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    Wyświetlanie 1-92 z 92
    Tytuł:
    Multi-source-supplied parallel hybrid propulsion of the inland passenger ship STA.H. Research work on energy efficiency of a hybrid propulsion system operating in the electric motor drive mode
    Autorzy:
    Kowalski, J.
    Leśniewski, W.
    Litwin, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259623.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    hybrid ship propulsion
    ship propulsion
    Opis:
    In the Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, design has recently been developed of a small inland ship with hybrid propulsion and supply system. The ship will be propelled by a specially designed so called parallel hybrid propulsion system. The work was aimed at carrying out the energy efficiency analysis of a hybrid propulsion system operating in the electric motor drive mode and at performing the noise pollution measurements. The performed investigations have shown that a significant impact on the efficiency and on the acoustic emission has the type of belt transmission applied.
    Źródło:
    Polish Maritime Research; 2013, 3; 20-27
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Waterjet propulsion of small-draught inland waterways ships
    Autorzy:
    Domachowski, Z.
    Próchnicki, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/260461.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion
    hydromechanics
    Opis:
    This paper presents some aspects of ship waterjet propulsion. Advantages and limitations of its applicability are discussed. Also, possible use of waterjet propeller to move a small-draught inland waterways ship, is considered .
    Źródło:
    Polish Maritime Research; 2006, S 2; 66-71
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A proposal of ship gas-turbine driven waterjet propulsion - preliminary considerations
    Autorzy:
    Próchnicki, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/962800.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion
    hydromechanics
    waterjet
    Opis:
    In the paper are presented preliminary considerations concerning the efficiency of waterjet ship propulsion system, as well as the calculation of main dimensions of waterjet channel. The friction and momentum losses of the flow channel have been roughly estimated by using Fliegner s equations. An important conclusion is confirmed that the summary losses are inversely proportional to square of ship velocity (~1/u2). On the other hand the ship propulsion power is directly proportional to third power of ship velocity (~u3). Therefore to minimize ship s hull resistance, hulls of water jet-driven ships ought to be of a great slenderness - e.g. L/B = 15, stabilized by sponsons, or of semi-swath hydrofoil-supported construction.
    Źródło:
    Polish Maritime Research; 2004, S 1; 79-82
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnosing of ship propulsion elements by vibration measurement
    Autorzy:
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/244654.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    diagnosing
    vibroacoustics
    gas turbine engines
    ship propulsion plantDiagnosing
    ship propulsion plant
    Opis:
    In the present time the technical progress, make us use more and more complicated machines in our everyday life. The application of turbine engines as the main propulsion engines of a vessel impels, according to requirements, operation procedures. It alters considerably the usage of gas turbine engines in the navy from the ones in aviation. The relatively low load is characteristic to the operation of the marine engine. In the case of the technology used at sea, the necessity of highly specialized service is especially evident. In the paper, we present the diagnostic systems elaborated to support the exploitation of the vessel power plant with gas turbines. Application of computer simulation for diagnosing a technical state of gas turbines rotor sets should be applied during calculation and project process. During engine assembly, the rotating components are mounted with great care with the main objective of minimizing shaft unbalance. However, even with the best of care, such factors as machining imperfection, differential thermal expansion etc cause a small residual unbalance of gas turbine rotor. The dynamic problems of Marine Gas Turbine Engines are connected with such basic elements: rotors, bearings, struts of bearings, engine body and type of substructure. The proposed diagnostics method makes it possible to determine the limiting value of vibration symptoms .
    Źródło:
    Journal of KONES; 2011, 18, 1; 93-98
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Case Study on the Unavailability of a Ship Propulsion System under Aging Effects and Maintenance
    Autorzy:
    Okazaki, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117350.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    vessel exploitation
    unavailability of a ship propulsion system
    ship propulsion
    ship propulsion system
    aging effects
    ship maintenance
    GO-FLOW
    fuel consumption
    Opis:
    Unavailability of a ship propulsion system under aging effects and proper maintenance is estimated using GO-FLOW. GO-FLOW is an effective software tool for the unavailability analysis of complex systems. Aging effects are incorporated into GO-FLOW using a time-dependent technique and assuming a linear aging model. The results show that the aging effects and improper maintenance can potentially increase the frequency of accidents due to a malfunction of the propulsion system by a factor of three.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 501-508
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Automatic control systems for ships fitted with podded propulsion drive (POD)
    Autorzy:
    Dymarski, C.
    Dąbrowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/962799.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion
    azimuthal propulsion
    ship control systems
    Opis:
    The paper shows purposefulness and possiblity of automation of ship propulsion systems, especially those of POD type, intended to be used on four Baltic navigation ships: a containership, ro-ro ship, product tanker, as well as river-sea-going ship, designed within the frame of the Eureka "Baltecologicalship" project. Requirements of ship classification societies, and general ones for modern ship control systems were presented, as well as a review and analysis of currently applied power plant automation systems for diesel- electric ships fitted with podded propulsion drive (POD), were performed. Moreover real ways and possibilities of controlling ship s course and speed were indicated. Information contained in this paper may facilitate selecting appropriate design assumptions for a propulsion control system to be applied on the above mantioned ships.
    Źródło:
    Polish Maritime Research; 2004, S 1; 83-86
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnosing elements of ship propulsion of vibration measurement
    Autorzy:
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/243179.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    diagnosing
    vibroacoustics
    gas turbine engines
    ship propulsion plant Diagnosing
    ship propulsion plant
    Opis:
    In the present time the technical progress make us use more and more complicated machines in our everyday life. In the case of the technology used at sea the necessity of highly specialised service is especially evident. The diagnostic systems elaborated to support the exploitation of the vessel power plant with gas turbines are presented in the paper. Application of computer simulation for diagnosing a technical state of gas turbines rotor sets should be applied during calculation and project process. During engine assembly, the rotating components are mounted with great care with the main objective of minimising shaft unbalance. However, even with the best of care, such factors as machining imperfection, differential thermal expansion etc cause a small residual unbalance of gas turbine rotor. The dynamic problems of Marine Gas Turbine Engines are connected with such basic elements as rotors, bearings, struts of bearings, engine body and type of substructure.
    Źródło:
    Journal of KONES; 2007, 14, 2; 81-89
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LNG as a marine fuel - possibilities and problem
    Autorzy:
    Herdzik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/242119.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    marine fuel
    LNG
    ship propulsion
    Opis:
    The limitations of marine fuels use incorporated sulphur on levels 4-5% for HFO and 0.5-1% for MDO were caused a necessity of possessing on ship a few types of fuel: conventional and with limited amount of sulphur. It is a necessary to separate the installation of different fuels caused that the ship fuel system are complicated. It is needed to change the fuel with time advance on areas with SOx controlled emissions (SECA areas) for example Baltic and North Sea. In the same time it is needed to change the engine adjustment in the aim of decreasing NOx emission. It allows for fulfilling the emission on tier 2 level (IMO regulations). It was announced for January 1st 2016 the time of tier 3 requirement of being in force. It is seemed to be impossible the fulfilling of that standard on marine liquid fuels (HFO and MDO). It was interested on gas fuels, especially on popular one the liquid natural gas (LNG). In the liquid state LNG is seemed to be an attractive marine fuel. It is remaining a problem of marine engines adaptation for burning that type of fuel in the aim of fulfilling the tier3 standard. At present, available dual fuel for marine diesel engines burn natural gas for ship operating reasons. Fulfilment these requirements needs an engine modernization or the alternative way is use of piston spark engines. There is an additional problem the assurance of repeatability of natural gas combustion process. During the change of engine load changes the fuel-air mixture composition, it is heterogeneous in the cylinder volume caused the ignition loss, the knocking combustion and the risk of out-of-control fuel self-ignition. The paper presents a probe of analysis these problems.
    Źródło:
    Journal of KONES; 2011, 18, 2; 169-176
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmentally friendly fuel system for liquefied gas carrier propelled with 45 MW main propulsion plant
    Autorzy:
    Górski, Z.
    Cwilewicz, R.
    Krysiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246132.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    natural gas ship propulsion
    COGES propulsion system
    Opis:
    This paper describes the problem of improvement in environment protection by application "environment friendly" fuel natural gas for ship propulsion. In thepaper the most suitable type of ship main propulsion system using natural gas was take into consideration. Propulsion using Iow speed diesel engine, medium speed diesel engine, steam turbine and combined systems were taken into consideration. As a result of analysis it was affirmed that COGES (Combined Gas Turbine and Steam Turbine Integrated Electric Drive System) is the most suitable propulsion plant to be fed with natural gas in contrary to ship diesel engines which adaptation to natural gas use still is in initial condition. COGES type propulsion plant consists in thermodynamic join of gas turbines and steam turbines. Ali turbines drive generators ofmain ship power station supplying simultaneously electric power to ship main propulsion electric motors and to ship electric network as well. It is suggested to use natural gas as fuel for gas turbines. Steam turbines are driven by steam produced in boilers warmed by gas turbines exhaust gases. This way a high efficiency of ship propulsion is obtained. The simplest source of natural gas is cargo carried by LNG (Liquefied Natural Gas) carriers. The preliminary project of such a carrier fuel system is presented in the paper. In addition conditions of application, advantages and disadvantages of natural gas fuel system are discussed.
    Źródło:
    Journal of KONES; 2010, 17, 1; 149-154
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of effectiveness of waterjet propulsor for a small underwater vehicle
    Autorzy:
    Rowinski, Lech
    Kaczmarczyk, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/2033211.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion
    hydromechanics
    waterjet
    underwater vehicle
    Opis:
    The goal of the project described is to replace the existing propulsion system of a small underwater vehicle with a solution less prone to mechanical damage and ensuring a lower risk of the entanglement of fibrous objects suspended in the body of water. Four typical marine screws are utilised in the current design of the vehicle. One possible solution of the problem is the application of waterjet propulsors located inside the body of the vehicle instead. The general conditio of the application of the new solution was to secure at least the same motion control capabilities of the vehicle while the basic capability is its propulsion effectiveness at the required speed. Specific features of the considered waterjet propulsor, when compared with their application in surface vessel propulsion, are the lack of the head losses and the low significance of cavitation issues. One of the difficulties in the considered case is the small diameter of the propulsor in comparison to commercially available waterjet units, which have diameters between 0.1 [m] and 1.0 [m]. There is very little data regarding the design and performance of devices in the 0.02 to 0.05 [m] range. Methods utilised to forecast the performance of the new propulsion system are presented and results compared. These were semi-empirical calculations, numerical calculations and tests of real devices. The algorithm that is based on semi-empirical calculations is of particular interest while it offers possibility quick assessment of performance of a propulsor composed of several well defined components. The results indicate the feasibility of modification of the propulsion system for the considered vehicle if all the existing circumstances are taken into account.
    Źródło:
    Polish Maritime Research; 2021, 4; 30-41
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of main dimensions and estimation of propulsion power of a ship
    Autorzy:
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/244443.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship propulsion
    Marine Power Plant
    database
    ship’ dimensions
    Opis:
    TEU number, which is the container ships’ crucial designing factor, directly influences the main hull dimensions such as displacement V , length L, breadth B, draught T, their combinations and block coefficient CB. The main dimensions have a great impact on developing the ships resistant performance. Thus, it is really fundamental to establish the correct dimensions of the hull during the design and ship building process. Estimating the shape of the ship’s hull, that comprises its main dimensions, is one of the basic tasks as part of the preliminary design stage. The most significant decisions determining ships performance, its duration and building costs are made at the beginning of the preliminary stage, when the costs are relatively low. It is important to limit the total ship resistance, for instance, by lowering the wave ship resistance as much as possible, especially when the operational speed and TEU number carried by one vessel is increasing. That resistance depends on the operational speed expressed by Froude number. The resistance criteria and the existing hull dimensions limits, resulting from ships route, must be taken into consideration bearing in mind safety conditions such as ships stability and seaworthiness, when the main ships dimensions are being determined. In the paper are presented general rules for calculations of ship’s hull principle dimensions and total power of engines of container ship 1300TEU and 18 kn at preliminary stage of design process.
    Źródło:
    Journal of KONES; 2014, 21, 2; 39-44
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An analysis 0f characteristics of ship gas turbine propulsion system (in the light of the requirements for ship operation in the Baltic Sea)
    Autorzy:
    Domachowski, Z.
    Dzida, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/962803.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion system
    gas turbines
    environment protection
    Opis:
    The paper concerns a propulsion system of merchant ships intended for sailing in the Baltic Sea zone. Such system is to satisfy the ecological requirements determined by relevant international conventions for special zones to which the Baltic Sea also belongs. The paper draws attention to gas turbine used as a prime mover for such ships, because it satisfies the ecological requirements and has also other advantages. Application of gas turbine for ship powering does not require exhaust gas to be purified, however it requires fuel oils of a low sulphur content to be used. If the ecological rules impose the using of the fuel oils of similar quality for diesel engines then gas turbine propulsion system will be comparable - also economically (regarding specific fuel oil consumption cost) - with that of diesel engine. It would be even more favourable in a combine gas turbine /steam turbine system, especially at compound production of electric and heat energy (i.e. COGES systems). In the Baltic Sea zone gas turbines willfind application to powering a. o. such ships as : fast car-passenger ferries, fast cargo ships, special vehicles (hydrofoils, hovercraft, motor yachts).
    Źródło:
    Polish Maritime Research; 2004, S 1; 73-78
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for selection of parameters of ship propulsion system fitted with compromise screw propeller
    Autorzy:
    Michalski, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/260378.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    design of inland waterways ships
    ship propellers
    ship propulsion
    Opis:
    This paper concerns an algorithmic method for preliminary selection of parameters of ship propulsion system fitted with fixed screw propeller in the case when the ship’s operation is associated with significant changes of waterway depth and width, hull resistance of the ship and its service speed. Mathematical model arguments of the considered design problem are main ship design parameters identified in the preliminary design stage. Structure of the formulated model complies with formal requirements for continuous- discrete mathematical optimization problems. The presented examples of application of the method concern an inland waterways ship fitted with compromise screw propeller optimized in the sense of minimization of fuel consumption for passing a given route distance within a given time. The elaborated method may be especially useful in designing such ships as : coasters, inland waterways ships, tugs, pushers, trawlers, mine sweepers, icebreakers etc.
    Źródło:
    Polish Maritime Research; 2007, 4; 3-9
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two design concepts of power plant for an inland waterways passenger ship intended for operating on BERLIN – KALININGRAD route
    Autorzy:
    Bocheński, D.
    Rudnicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/260447.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    inland waterways passenger ship
    ship power plant
    ship propulsion systems
    Opis:
    This paper presents two most probable design solutions of power plant for a two-segment passenger ship intended for operating on inland waterways of Poland, Germany and Russia. Preliminary designs of the main power plant to be installed on the pusher are presented, as well as requirements for the auxiliary power plant to be placed on the barge are outlined.
    Źródło:
    Polish Maritime Research; 2006, S 2; 52-56
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A concept design of diesel – hydraulic propulsion system for passenger ship intended for inland shallow water navigation
    Autorzy:
    Dymarski, Czesław
    Powiązania:
    https://bibliotekanauki.pl/articles/259998.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion systems
    hydraulic drive and control
    azimuthal propulsion systems
    Opis:
    This paper presents an analysis of environmental and technical conditions necessary for working out a possibly most favourable propulsion system for a two – segment passenger ship intended for navigation between Berlin and Kaliningrad. There are presented various types of propulsion systems for small ships as well as analyzed their possible applications and consequences. In this work there were taken into account system’s reliability, efficiency, dimensions, mass and costs of manufacturing, assembling and possible replacing the system components as well as an impact on maneuverability and natural environment. With taking into account the above mentioned criteria it was finally found that the diesel-hydraulic system fitted with two azimuthal ducted solid propellers is the most favourable. There are also presented a schematic propulsion and control diagram, three-dimensional arrangement drawing of system components as well as assembly drawing of the designed azimuthal propulsion system.
    Źródło:
    Polish Maritime Research; 2019, 3; 30-38
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economical analysis of selected variants of power plant for inland waterways passenger ship intended for operating on Berlin - Kaliningrad route
    Autorzy:
    Bocheński, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/260439.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    inland waterways passenger ship
    ship power plant
    ship propulsion systems
    Opis:
    This paper contains an economical analysis of three selected variants of power plant for inland waterways passenger ship intended for operating on Berlin-Kaliningrad route. Purchase cost of elements of the ship’s energy system and fuel consumption cost were assumed as the assessment criterion for the analyzed variants of the ship’s power plant. The economical indices : Average Annual Cost (AAC) and Net Present Value (NPV) were taken into consideration.
    Źródło:
    Polish Maritime Research; 2006, S 2; 47-51
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy efficient and environmentally friendly hybrid conversion of inland passenger vessel
    Autorzy:
    Litwin, W.
    Leśniewski, W.
    Kowalski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259006.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion
    hybrid propulsion
    green shipping
    zero emission
    solar power
    Opis:
    The development and growing availability of modern technologies, along with more and more severe environment protection standards which frequently take a form of legal regulations, are the reason why attempts are made to find a quiet and economical propulsion system not only for newly built watercraft units, but also for modernised ones. Correct selection of the propulsion and supply system for a given vessel affects significantly not only the energy efficiency of the propulsions system but also the environment – as this selection is crucial for the noise and exhaust emission levels. The paper presents results of experimental examination of ship power demand performed on a historic passenger ship of 25 m in length. Two variants, referred to as serial and parallel hybrid propulsion systems, were examined with respect to the maximum length of the single-day route covered by the ship. The recorded power demands and environmental impact were compared with those characteristic for the already installed conventional propulsion system. Taking into account a high safety level expected to be ensured on a passenger ship, the serial hybrid system was based on two electric motors working in parallel and supplied from two separate sets of batteries. This solution ensures higher reliability, along with relatively high energy efficiency. The results of the performed examination have revealed that the serial propulsion system is the least harmful to the environment, but its investment cost is the highest. In this context, the optimum solution for the ship owner seems to be a parallel hybrid system of diesel-electric type.
    Źródło:
    Polish Maritime Research; 2017, 4; 77-84
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy analysis of the propulsion shaft fatigue process in a rotating mechanical system part III dimensional analysis
    Autorzy:
    Korczewski, Zbigniew
    Marszałkowski, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/1573606.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion shaft
    dimensional analysis
    Buckingham theorems
    similarity criteria
    Opis:
    This article presents the third and last part of the problem of diagnosing the fatigue of marine propulsion shafts in terms of energy with the use of the action function, undertaken by the authors. Even the most perfect physical models of real objects, observed under laboratory conditions and developed based on the results of their research, cannot be useful in diagnostics without properly transferring the obtained results to the scale of the real object. This paper presents the method of using dimensional analyses and the Buckingham theorem (the so-called π theorem) to determine the dimensionless numbers of the dynamic similarity of the physical model of the propulsion shaft and its real ship counterpart, which enable the transfer of the results of the research on the energy processes accompanying the ship propulsion shaft fatigue from the physical model to the real object.
    Źródło:
    Polish Maritime Research; 2021, 2; 72-77
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of gas turbine controller adjustment on ship propulsion system behavior in rough sea conditions. Part 2. The simulation investigations
    Autorzy:
    Dzida, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/259451.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion system
    gas turbines
    automatic control
    sea waving
    Opis:
    The paper presents simulation investigations of influence of gas turbine controller adjuŹstment on ship propulsion system operating in heavy sea conditions, based on the model presented in Part 1 of the paper. The ship propulsion system with two gas turbines driŹving - through mechanical gear - ship controllable pitch propeller, described in Part 1, was used to analysis. The harmonic disturbances due to sea waves with selected frequencies were used as input function in computing the system’s amplitude characteristics at different settings of P and PD controllers.
    Źródło:
    Polish Maritime Research; 2004, 1; 15-23
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assisted propulsion device of a semi-submersible ship based on the magnus effect
    Autorzy:
    Lv, Jingze
    Lin, Yiqun
    Zhang, Rui
    Li, Boyang
    Hualin, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/32909218.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Flettner rotor
    semi-submersible ship
    wind energy
    ship propulsion
    numerical simulation
    Opis:
    The purpose of this study is to explore the potentiality of wind propulsion on semi-submersible ships. A new type of Flettner rotor (two rotating cylinders) system installed on a semi-submersible ship is proposed. The structure and installation of two cylinders with a height of 20 m and a diameter of 14 m are introduced. The numerical simulation of the cylinder is carried out in Fluent software. The influence of apparent wind angle and spin ratio on the two cylinders are analysed, when the distance between two cylinders is 3D-13D (D is cylinder diameter). When the distance between two cylinders is 3D, the performance of the system increases with an increase in spin ratio. Moreover, the apparent wind angle also has an effect on the system performance. Specifically, the thrust contribution of the system at the apparent wind angle of 120° is the largest at the spin ratio of 3.0. The maximum thrust reaches 500 kN. When the spin ratio is 2.5 and the apparent wind angle is 120°, the maximum effective power of the system is 1734 kW. In addition, the influence of the two cylinders distance on system performance cannot be ignored. When the distance between the two cylinders is 7D and the spin ratio is 2.5, the effective power of the system reaches a maximum, which is 1932 kW.
    Źródło:
    Polish Maritime Research; 2022, 3; 33-46
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of propeller emergence on hull, propeller, engine, and fuel consumption performance in regular head waves
    Autorzy:
    Ghaemi, Mohammad Hossein
    Zeraatgar, Hamid
    Powiązania:
    https://bibliotekanauki.pl/articles/32898210.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship dynamics
    ship propulsion system
    propeller ventilation
    propeller emergence
    sea waves
    Opis:
    In this study, the impact of propeller emergence on the performance of a ship (speed), propeller (thrust, torque, and RPM), a diesel engine (torque and RPM) and fuel consumption are analysed under severe sea conditions. The goal is to describe the variation in the system variables and fuel consumption rather than analysing the motion of the ship or the phenomenon of propeller ventilation in itself. A mathematical model of the hull, propeller, and engine interactions is developed in which the propeller emergence is included. The system parameters are set using model experiments, empirical formulae, and available data for the engine. The dynamic response of the system is examined in regular head waves under submerged and emerged conditions of the propeller. The pulsatility and the extent of variation of 20 selected variables for the coupled system of hull, propeller, and engine are elaborated using quantitative and qualitative terms and absolute and relative scales. The simulation begins with a ship moving on a straight path, in calm water, with a constant speed for the ship, propeller and engine under steady conditions. The ship then encounters regular head waves with a known time series of the total resistance of the ship in waves. Large motions of the ship create propeller emergence, which in turn reduces the propeller thrust and torque. This study shows that for a specific ship, the mean ship speed, shaft angular velocity, and engine power were slightly reduced in submerged conditions with respect to calm water. We compared the mean values of the variables to those in the emerged condition, and found that the shaft angular velocity was almost the same, the ship speed was considerably reduced, and the engine power significantly dropped with respect to calm water. The ratios of the amplitude of fluctuation to the mean (Amp/Mean) for the ship speed and angular velocity of the shaft under both conditions were considerable, while the Amp/Mean for the power delivered by the engine was extremely high. The outcomes of the study show the degree of influence of propeller emergence on these variables. We identify the extent of each change and categorise the variables into three main groups based on the results.
    Źródło:
    Polish Maritime Research; 2022, 4; 56-76
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of a new type of Flettner rotor in merchant ships
    Autorzy:
    Li, Boyang
    Zhang, Rui
    Li, Yajing
    Zhang, Baoshou
    Guo, Chao
    Powiązania:
    https://bibliotekanauki.pl/articles/1573694.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion
    flettner rotor
    wind energy
    rotating cylinder
    numerical simulation
    Opis:
    Wind energy is a clean and renewable source of energy. This study seeks to explore the potential for utilising wind power for merchant ships. A new type of Flettner rotor (rotating cylinder) mounted on the superstructure of a ship is proposed and numerically simulated. The construction and installation of the rotating cylinder is designed and a numerical simulation of the ship-mounted cylinder is carried out, using the commercially available CFD code Ansys Fluent to obtain parameters such as lift and drag coefficient of the cylinder in different conditions. Specifically, it is found that the cylinder type superstructure can play a certain role in reducing the effect of friction by comparing traditional and cylindrical superstructures; the rotating cylinder can generate auxiliary thrust for the ship. After analysis, the wind speed around the cylinder and spin ratio will have a direct influence on its thrust effect; there is an inflection point in the lift coefficient with the increase of α; the thrust coefficient (8.63) reaches the maximum environmental wind speed at 10 m/s and spin ratio is 2.5. For the rotating cylinder, the greater the environmental wind, the greater the thrust contribution generated under the same spin ratio conditions. The maximum thrust can reach 750,000 N; the cylinder’s auxiliary propulsion contribution shows a better advantage in α = 2.0. The effective power generated by the cylinder reaches a maximum of 2,240 kW for environmental wind speed = 20 m/s and α = 1.0.
    Źródło:
    Polish Maritime Research; 2021, 1; 28-41
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental analysis of the effectiveness of ship propulsion devices
    Autorzy:
    Abramowicz-Gerik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/320536.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    napędy okrętowe
    modelowanie
    siły hydrodynamiczne
    ship propulsion
    modelling
    hydrodynamic forces
    Opis:
    The paper presents the study on the effectiveness of ship propulsion devices based on model tests conducted in the open water experimental set up. The influence of the water depth to draft ratio and distance from the vertical tight wall on the hydrodynamic forces generated by the propellers on the ship hull was investigated. The interaction effects observed for the twin propeller ship in bollard pull condition were compared with the effects induced by single propeller vessels available in literature and discussed with respect to the mathematical modelling of hydrodynamic forces generated on the hull by ship propulsion devices.
    Źródło:
    Annual of Navigation; 2008, 13; 5-13
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sighting through as part of shaft alignment procedure
    Wyznaczanie linii odniesienia jako element procedury osiowania wałów
    Autorzy:
    Jarysz-Kamińska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/327712.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    wał
    współosiowość
    okrętowy układ napędowy
    shaft
    alignment
    ship propulsion system
    Opis:
    This paper presents chosen activities of the ships propulsion system shafting alignment procedure. The main focus in this paper was put on sighting through (bore sighting) which can be done with three different types of measurement equipment: piano were, optical instruments and laser instruments. The analysis of measurement equipment allows selection of most optimal measurement solution for company. The matter of this selection is to avoid hazard to the shaft line due to shafts misalignment. Presented in paper measuring techniques and measurement equipment which is being used for sighting trough the elements of ships propulsion system meet technological requirements requested by the client and by the ship classification society.
    W artykule przedstawiono zagadnienie procedury osiowania układu napędowego statku. Skoncentrowano się na ustawianiu bezpośrednim z wykorzystaniem trzech różnych przyrządów pomiarowych. Do pomiarów wykorzystano strunę stalową, urządzanie optyczne i urządzenie laserowe. Przedstawienie trzech różnych grup przyrządów pozwala na wybór najbardziej optymalnego rozwiązania dla przedsiębiorstwa. Istotą tego doboru jest uniknięcie zagrożenia dla linii wałów wynikającą z przekroczenia parametrów współosiowości. Omawiane techniki i przyrządy pomiarowe służące do bezpośredniego ustawiania elementów okrętowego układu napędowego spełniają wymagania technologiczne stawiane zarówno przez klienta jak i towarzystwa klasyfikacyjne.
    Źródło:
    Diagnostyka; 2010, 4(56); 65-68
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability, availability, and maintainability analysis of the propulsion system of a fleet
    Autorzy:
    Bayraktar, Murat
    Nuran, Mustafa
    Powiązania:
    https://bibliotekanauki.pl/articles/24202522.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ship propulsion system
    reliability
    availability
    maintainability
    RWB software
    RAM analysis
    Opis:
    New systems are produced and developed to meet specific needs, and their reliability is the most important issue. In the maritime industry, evaluating failures in a ship’s propulsion system results in high costs and the loss of prestige for the company. Land/sea fleet employees need to detect and minimize the failures that may occur in ship propulsion systems in advance to ensure the continuity of the ships’ operations. In this study, the recorded failure data of four different ships belonging to a fleet in the last 10 years are used. Failures were examined as a whole since the ships have similar propulsion systems. The obtained failure data were grouped, and the average time to fix the failures was determined by the chief engineer and made suitable for reliability, availability, and maintainability (RAM) analysis. A suitable model was created for grouped failures by Isograph’s RWB software. As a result of the analysis of the propulsion system and its subsystems, the main engine of the ship was shown to have the best reliability. Furthermore, the most important components were the cylinders of the main engine as subsystems. This study highlights the components that are important to the reliability of a propulsion system. Thanks to the RAM analysis, improvements can be pinpointed on a ship’s propulsion system, which will increase the operations of the maritime industry. Reducing failures will further increase the confidence in maritime transport and strengthen its place among the modes of transportation. This study provides a valuable resource for academicians, experts, as well as companies working on reliability, availability, and maintainability in the future.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 70 (142); 63--70
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of nondimensional arguments in dimensional functions of ship propulsion engine operation
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246528.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship propulsion engine operation dimensional analysis
    dimensionless arguments in dimensional functions
    Opis:
    The following article describes different ways for determining dimensionless arguments in dimensional functions of ship propulsion engine operation. Dimensional space has also been characterized in relation to properties it possesses. An attention has been paid to the fact that it creates Abelian group, where involution fulfils multiplication axiom by scalar, and positive numbers that belong to dimensional space create dimensionless subspace. The conception of dimensional dependence has also been explained. There are also described conditions, which should be fulfilled by dimensional quantities to be dimensionally independent. Fundamental theorems of dimensional analysis have also been characterized. There is also given the definition of dimensional function of ship propulsion engine operation concerning values and dimensional arguments. It has been explained what requirements are to be fulfilled. One can also learn what limitations are imposed on dimensional function of ship propulsion engine operation concerning dimensional homogeneity and invariance. The ways of dimensional function transformation into a numerical one have been described. In addition, some conditions have been given which must be applied at given method of dimensional function transformation. An attention has been paid to the fact that dimensionless arguments are similarity invariant as a result of transformation by the similarity method of mathematical model of ship propulsion engine operation. In this study, the ship propulsion engine performance is expressed by product of Joule and second interpreted as transfer of energy in the form of work. Identification of ship propulsion engine operation by dimensional analysis performed in terms of its usefulness for diagnosis of ship propulsion engines. The basic problem of marine diesel exploitation is the monitoring of its technical condition. Diagnosis of marine diesel propulsion increases the safety of the ship and thus protects the marine environment against pollution.
    Źródło:
    Journal of KONES; 2015, 22, 2; 185-190
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Subjective risk estimation of the rare event
    Autorzy:
    Nguyen, Hoang
    Powiązania:
    https://bibliotekanauki.pl/articles/241939.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    rare event
    subjective risk estimation
    intuitionistic fuzzy set
    ship propulsion risk
    Opis:
    In the safety engineering, the most frequently disadvantage in risk estimation is the lack of data. In such cases, we have to rely on subjective estimations made by persons with practical knowledge in the field of interest, i.e. experts. However, in some realistic situations, they may have uncertainty in the perceiving and evaluation of the problem considered or limited knowledge of the rare events, such as the consequences of the seagoing ship propulsion failures. The probabilistic models of the risk estimation turn out to be insufficient in modelling the subjective uncertainty. The fuzzy methods are viewed to be powerful in dealing with ambiguity and uncertainty that can be used to handle with the subjective estimation. This article addresses the intuitionistic fuzzy method in the subjective estimation of the ship propulsion failure consequences as rare event risk. In the article, a subjective model of the ship propulsion risk is developed as scenarios of the different subsequent consequences of loss of ship propulsion function until a seriously severe accident resulting in loss of seaworthiness. The model proposes an approach combining AHP method and intuitionistic fuzzy method to assess the occurrence probability and severe probability of these rare events based on the expert opinions. In order to show the applicability of the proposed model, a study case of the propulsion risk of the container carrier operating on the North Atlantic lines is conducted.
    Źródło:
    Journal of KONES; 2019, 26, 1; 103-110
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of main engine power of seagoing ship at preliminary design stage
    Autorzy:
    Charchalis, A.
    Krefft, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247536.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    seagoing ships
    container vessels
    preliminary design stage
    ship's propulsion
    main engine power
    Opis:
    Permanent growth of the container shipbuilding has led to the need of research - developing activities with references to design and ship building process. The requirements for the container vessels have been modified and changed compared with the ships built in the eighties of the past century. The ships capacity have been increased up to and even above 10 000 twenty feet containers (TEU) with the service speed above 25 knots. For such a giant sea going vessels with the overall length above 300 meters and draught above 10 meters the ship hull resistance characteristics have been modified. Those conditions bring to the situation where the propulsion power for the seagoing ships reached 80 MW. The estimation of the main engine power relation in the preliminary design stage is the main aim of the paper. The problem is such important as in that stage the most important design decisions with relatively low investment costs are determined. Moreover, the preliminary design stage distinguishes that the designer possesses just a few design parameters given by the ship owner of the future vessel. That is why the correct choice of the main engine power is difficult to determine. Determination of the main propulsion power impacts the electric and heat energy amount and the production way of both energy forms. The main engine equation has been determined based on the container ship's parameters for the entire range of container vessels load capacity (TEU). The values of the design parameters have came from author 's data base for the contemporary container vessels.
    Źródło:
    Journal of KONES; 2010, 17, 4; 89-95
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Step by Step Approach for Evaluating the Reliability of the Main Engine Lube Oil System for a Ships Propulsion System
    Autorzy:
    Anantharaman, M.
    Khan, F.
    Garaniya, V.
    Lewarn, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/116248.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Propulsion
    Main Engine
    Main Propulsion
    Lubricating Oil System
    Markov Analysis
    reliability
    Propulsion System
    Engine Lube Oil System
    Opis:
    Effective and efficient maintenance is essential to ensure reliability of a ship's main propulsion system, which in turn is interdependent on the reliability of a number of associated sub- systems. A primary step in evaluating the reliability of the ship's propulsion system will be to evaluate the reliability of each of the sub- system. This paper discusses the methodology adopted to quantify reliability of one of the vital sub-system viz. the lubricating oil system, and development of a model, based on Markov analysis thereof. Having developed the model, means to improve reliability of the system should be considered. The cost of the incremental reliability should be measured to evaluate cost benefits. A maintenance plan can then be devised to achieve the higher level of reliability. Similar approach could be considered to evaluate the reliability of all other sub-systems. This will finally lead to development of a model to evaluate and improve the reliability of the main propulsion system.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 367-371
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metody ograniczania emisji substancji gazowych i pyłowych na statkach śródlądowych
    Methods for limiting emissions of exhoust emissions on inland waterway vessels
    Autorzy:
    Semenov, I. N.
    Kaup, M.
    Ignalewski, W.
    Durajczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/134312.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    statek śródlądowy
    paliwa alternatywne
    napęd statku
    inland waterway vessel
    alternative fuels
    ship propulsion
    Opis:
    Artykuł dotyczy problematyki ograniczania emisji substancji gazowych i pyłowych na statkach śródlądowych w związku z nowymi uregulowaniami prawnymi i technicznymi obowiązującymi na obszarze Unii Europejskiej. Jednym z kierunków spełnienia norm ochrony środowiska, w tym normy STAGE V, jest stosowanie paliw alternatywnych w napędach nowo budowanych statków śródlądowych lub stosowania instalacji ograniczających emisje szkodliwych substancji do atmosfery na statkach będących w eksploatacji kilkadziesiąt lat. Celem artykułu jest analiza wybranych rozwiązań napędowych i możliwości ich wdrożenia w najbliższych latach, aby dostosować tabor pływający do nowoczesnych wymagań technicznych oraz obniżyć ich koszty eksploatacji. W artykule przedstawiono dotychczas stosowane rodzaje napędów na jednostkach śródlądowych oraz uwarunkowania prawne określające warunki wdrażania paliw alternatywnych i stosowania technologii ograniczających emisje spalin. Przeanalizowano wybrane paliwa alternatywne oraz możliwości ich zastosowania w napędach statków śródlądowych. W ostatniej części rozpatrzono aspekt ekonomiczny zastosowania gazu naturalnego jako paliwa i jego wpływ na korzyści armatora statku śródlądowego.
    The authors of the article raise the issue of limiting the emission of gaseous and dust substances on inland vessels in connection with new legal and technical regulations in European Union. One of the directions of meeting environmental protection standards, including STAGE V, is the use of alternative fuels in drives of newly built inland vessels or the use of installations limiting emissions of harmful substances to the atmosphere on vessels in operation for several decades. The aim of the article is to analyze selected drive solutions and the possibilities of their implementation in the coming years to adapt the fleet to the modern technical requirements and reduce their operating costs. The article presents hitherto used types of drives on inland units and legal conditions defining for the implementation of alternative fuels and the use of technologies limiting exhaust emissions. In addition, were analyzed selected alternative fuels and options for their use in inland waterway vessels. The last part deals with the economic aspect of the use of natural gas as a fuel and its impact on the benefits of the owner of an inland vessel.
    Źródło:
    Problemy Transportu i Logistyki; 2018, 44, 4; 85-94
    1644-275X
    2353-3005
    Pojawia się w:
    Problemy Transportu i Logistyki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopping of Ships Equipped with Azipods
    Autorzy:
    Nowicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/117172.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Azipods, Propeller
    Stopping od Ships
    Ship Propulsion
    ship model
    Stopping Tests
    LNG Carrier
    Stopping Manoeuvres
    Opis:
    The paper contains a description of different possibilities of stopping a large ship equipped with azipods. The model tests were carried out to compare the effectiveness of stopping the ship using the different methods. The ship model used in stopping tests reproduces a large LNG carrier of capacity ~150 000 m3.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 373-376
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The semi-Markov model of the process of appearance of sea-going ship propupsion system ability and inability states in application to determining the reliablity of these systems
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259071.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    reliability
    semi-Markov process
    state of ability
    state of inability
    sea-going ship
    ship propulsion system
    Opis:
    The article presents possible application of the theory of semi-Markov processes in creating the eight-state model of the process of appearance of the propulsion systems ability and inability states on sea-going vessels performing transportation tasks in a relatively long operating time t (t → ∞). The model has been proved to be able to be successfully used for determining the reliability of the abovementioned systems. The probability of faultless operation in time t was assumed the measure of system reliability. Operating situations of sea-going vessels were characterised, with special attention being paid to the fact that the loads of propulsion system components of these vessels are of random nature. These loads lead to damages which for this reason were also considered random events. It was also assumed that the damages provoke the appearance of states of inability of particular ship propulsion system components which means that these states are random events as well. The states of ability of a given ship propulsion system have been assumed to exist when all components of this system are in the state of ability. In case when at least one component is in the state of inability, the entire system is in the state of inability. Conditions were formulated for the reliability model of an arbitrary system to be able to be worked out in the form of the semi-Markov process. The need for the use of technical diagnostics in reliability examination of sea-going ship propulsion systems was indicated. In conclusions, certain qualities of the article were highlighted which are, in author’s opinion, of highest importance in reliability examination of sea-going ship propulsion systems.
    Źródło:
    Polish Maritime Research; 2013, 4; 18-24
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for estimating propulsion risk of the ship casualty
    Autorzy:
    Nguyen, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/242339.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    estimation
    expert judgment
    risk
    ship propulsion system
    analytic hierarchy process (AHP)
    sea transport
    Opis:
    Loss of the propulsion function by a ship is one of the most serious categories of hazardous events in sea transport. In specific external conditions it may lead to a loss of ship and environmental pollution. The consequences of propulsion loss by a ship are events classified by the International Maritime Organization as casualties or incidents. The probabilities of occurrence of the former events in a specific time unit constitute the propulsion risk of a ship. Determination of these probabilities is in practice confronted with difficulties connected with shortage of data. A method for estimating the risk caused by loss of a seagoing ship propulsion function is proposed. The estimation is fully based on the expert judgments. Expert is assumed to be well acquainted with the subject he is expected to formulate his judgment on. Expert should also be capable of formulating his judgment. This is connected with level of his education and the language used in the elicitation process, particularly as regards the parameters the expert is expected to estimate. This may be the language of numerical or linguistic values. Numerical values are better but are more difficult to articulate - also errors in judgments are more likely. To overcome this problem and to obtain a more accurate estimation, this study suggests using an analytic hierarchy process (AHP), which quantifies the subjective judgments and confirms the consistency of collected data. An example of the propulsion risk estimation of container carriers operating on the North Atlantic line allows to assess effectiveness of the method.
    Źródło:
    Journal of KONES; 2013, 20, 2; 315-321
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance and emission modelling and simulation of marine diesel engines using publicly available engine data
    Autorzy:
    Ghaemi, Mohammad Hossein
    Powiązania:
    https://bibliotekanauki.pl/articles/2033202.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine diesel engine
    mathematical model
    Mean-Value Model
    simulation of ship propulsion system
    Opis:
    To analyse the behaviour of marine diesel engines in unsteady states for different purposes, for example to determine the fuel consumption or emissions level, to adjust the control strategy, to manage the maintenance, etc., a goal-based mathematical model that can be easily implemented for simulation is necessary. Such a model usually requires a wide range of operating data, measured on a test stand. This is a time-consuming process with high costs and the relevant data are not available publicly for a selected engine. The present paper delivers a rapid and relatively simple method for preparing a simulation model of a given marine diesel engine, based only on the widely available data in the project guides indicated for steady state conditions. After establishing the framework of the mathematical model, it describes how the parameters of the model can be adjusted for the simulation model and how the results can be verified as well. Conceptually, this is a trial and error method, but the presented case example makes clear how the parameters can be selected to reduce the number of trials and quickly determine the model parameters. The necessary descriptions are given through a case study, which is the MAN-B&W 8S65ME-C8 marine diesel engine. The engine is assumed to be connected to a constant pitch propeller. The presented mathematical model is a mean-value zero-dimensional type with seven state variables. The other variables of the engine are determined based on the state independent variables and the input value, which is the fuel rate. The paper can be used as a guideline to prepare a convenient mathematical model for simulation, with the minimum publicly available data.
    Źródło:
    Polish Maritime Research; 2021, 4; 63-87
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on MDO of ship propulsion shafting dynamics considering the coupling effect of a propeller-shafting-hull system
    Autorzy:
    Liu, Jinlin
    Gu, Zheng
    Liu, Shuyong
    Powiązania:
    https://bibliotekanauki.pl/articles/32916294.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship propulsion shafting
    dynamic modelling
    shafting alignment
    shafting vibration
    multi-disciplinary design optimisation
    Opis:
    Dynamic designs for ship propulsion shafting can be categorised as complex multi-disciplinary coupling systems. The traditional single disciplinary optimisation design method has become a bottleneck, restricting the further improvement of shafting design. In this paper, taking a complex propulsion shafting as the object, a dynamic analysis model of the propeller-shafting-hull system was established. In order to analyse the coupling effect of propeller hydrodynamics on shafting dynamics, the propeller’s hydrodynamic force in the wake flow field was calculated as the input for shafting alignment and vibration analysis. On this basis, the discipline decomposition and analysis of the subdisciplines in design of shafting dynamics were carried out. The coupling relationships between design variables in the subdisciplines were studied and the Multi-disciplinary Design Optimisation (MDO) framework of shafting dynamics was established. Finally, taking the hollowness of the shaft segments and the vertical displacement of bearings as design variables, combined with the optimal algorithm, the MDO of shafting dynamics, considering the coupling effect of the propellershafting-hull system, was realised. The results presented in this paper can provide a beneficial reference for improving the design quality of ship shafting.
    Źródło:
    Polish Maritime Research; 2023, 1; 86-97
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ship’s operational speed on the planned ocean route in real weather conditions
    Autorzy:
    Szelangiewicz, Tadeusz
    Żelazny, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/27315876.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    ocean route
    ship speed
    weather parameters
    ship propulsion
    trasa oceaniczna
    prędkość statku
    parametr pogodowy
    napęd statku
    Opis:
    While operating the ship, one of the most important tasks is forecasting the ocean route. For this purpose, the speed characteristics of the ship are used, which are used in specialized computer systems and presented in publications. However, published algorithms for speed (or decrease of speed) calculations of a ship in real weather conditions on given routes are very simplified and do not contain all the relevant parameters related to the ship's hull (affecting its resistance when sailing, eg on waves), its propulsion and weather conditions. The article presents its own, more detailed mathematical model of the speed of the ship, and the performed calculations of speed of the ship were compared with the algorithms available in the literature and with the records from the ship's log.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 159-166
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prognozowanie charakterystyk napędowych statku ze śrubą stałą podczas pływania w zmiennych warunkach pogodowych
    Prediction of Propulsion Performance of a Ship with Fixed-Pitch Propeller in Variable Weather Conditions
    Autorzy:
    Szelangiewicz, T.
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/359720.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    charakterystyki napędowe statku
    praca napędu w zmiennych warunkach pogodowych
    EXPLO-SHIP 2004
    ship propulsion characteristics
    propulsion operation in variable weather conditions
    Opis:
    Przedstawiono algorytm umożliwiający numeryczne obliczanie charakterystyk napędowych statku. Charakterystyki te uzupełniono o wykresy całkowitego oporu w określonych warunkach pogodowych. Podano różne możliwości wyboru punktu pracy układu napędowego w zależności od przyjętych kryteriów.
    The article presents an algorithm for the numerical calculation of ship propulsion characteristics. The propulsion characteristics were completed with total resistance charts for given weather conditions. Alternative choices of the propulsion working point depending on assumed criteria were discussed.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 489-498
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative components importance analysis of a complex technical system with the use of different importance measures
    Analiza porównawcza ważności elementów systemu technicznego z jednoczesnym wykorzystaniem różnych miar ważności
    Autorzy:
    Chybowski, L.
    Idziaszczyk, D.
    Wiśnicki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/112937.pdf
    Data publikacji:
    2014
    Wydawca:
    STE GROUP
    Tematy:
    importance measures
    comparative analysis
    ship propulsion system
    miara ważności
    analiza porównawcza
    okrętowy układ napędowy
    Opis:
    This paper presents a components importance analysis of a complex technical system with the use of selected reliability components importance measures. The analysis was carried out on a propeller shaft stern tube seal of a ship propulsion system. The reliability structure of the analyzed system was modeled by means of the fault tree. For given system components the following were determined: the Birnbaum’s reliability and structural importance measure, reliability improvement potential, criticality measure and Vesely-Fussell’s measure. A transformation of measures based on rescaling their values has been proposed to simplify the comparative analysis using different measures with reference to the same system components. A transformation process for the analyzed system has been presented together with a results visualization of comparative components importance analysis by means of 3D bar charts and radar charts for a data series determined as system components and importance measures. Comments on the proposed methodology have been presented and other ways of its application have been indicated.
    W artykule przedstawiono analizę ważności elementów złożonego systemu technicznego z wykorzystaniem wybranych niezawodnościowych miar ważności elementów. Analizę przeprowadzono na przykładzie systemu smarowania i uszczelnienia pochwy wału śrubowego układu napędowego statku. Strukturę niezawodnościową analizowanego systemu zamodelowano z wykorzystaniem drzewa niezdatności. Dla poszczególnych elementów systemu wyznaczono niezawodnościową miarę ważności Birnbauma, miarę strukturalną Birnbauma, Potencjał przyrostu niezawodności, miarę krytyczności oraz miarę Veseley-Fussell’a, Zaproponowano transformację miar polegająca na przeskalowaniu ich wartości w celu ułatwienia analizy porównawczej wykorzystującej różne miary w odniesieniu do tych samych elementów systemu. Przedstawiono dla analizowanego systemu proces transformacji oraz zaprezentowano wizualizację wyników analizy porównawczej ważności elementów z wykorzystaniem wykresów słupkowych 3D oraz wykresów radarowych dla serii danych ustalonych jako elementy systemu oraz jako miary ważności. Przedstawiono uwagi dotyczące zaproponowanej metodyki i wskazano inne możliwe jej zastosowania.
    Źródło:
    Systemy Wspomagania w Inżynierii Produkcji; 2014, 1 (7); 23-33
    2391-9361
    Pojawia się w:
    Systemy Wspomagania w Inżynierii Produkcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coefficients of Propeller-hull Interaction in Propulsion System of Inland Waterway Vessels with Stern Tunnels
    Autorzy:
    Kulczyk, J.
    Tabaczek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117051.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Propulsion System
    Inland Waterway Vessel
    Stern Tunnels
    Ship Propulsion
    Propeller-Hull Interaction
    Hydrodynamics
    ANSYS Fluent
    hull efficiency
    Opis:
    Propeller-hull interaction coefficients - the wake fraction and the thrust deduction factor - play significant role in design of propulsion system of a ship. In the case of inland waterway vessels the reliable method of predicting these coefficients in early design stage is missing. Based on the outcomes from model tests and from numerical computations the present authors show that it is difficult to determine uniquely the trends in change of wake fraction and thrust deduction factor resulting from the changes of hull form or operating conditions. Nowadays the resistance and propulsion model tests of inland waterway vessels are carried out rarely because of relatively high costs. On the other hand, the degree of development of computational methods enables’ to estimate the reliable values o interaction coefficients. The computations referred to in the present paper were carried out using the authors’ own software HPSDKS and the commercial software Ansys Fluent.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 377-384
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy efficient small inland passenger shuttle ferry with hybrid propulsion - concept design, calculations and model tests
    Autorzy:
    Kunicka, Magdalena
    Litwin, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/259786.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship hybrid propulsion
    energy efficiency
    green shipping
    energy management
    Opis:
    In recent years, there has been a significant development in “green” and energy efficient propulsion systems, which fits into the general trend of environmentally friendly “green shipping”. The pursued goal is to construct a safe passenger ship that is low in energy demand and equipped with a highly energy efficient, emission-free propulsion system. The paper presents main problems encountered by designers of a small, hybrid-powered ferry powered lithium batteries. The conducted research allowed to create a design of an energy efficient hull shape, which decreases the demand for energy. Completed remote control model tests resulted in a proposal of an energy efficient and safe propulsion system with good manoeuvring capabilities. Measurements completed on an existing ferry permitted completing energy balance and forming an energy management policy. The paper contains the emission calculations computed for the existing ferry that are necessary for the environmental impact analysis. The soon to be constructed, newly designed vessel will provide a valuable contribution to hybrid-propulsion, energy management and unmanned technologies research.
    Źródło:
    Polish Maritime Research; 2019, 2; 85-92
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charging station location optimization of electric ship based on backup coverage model
    Autorzy:
    Zhang, W.
    Yan, X.
    Zhang, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/117632.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    main engine
    ship propulsion
    charging station
    electric ship
    backup coverage model
    electric ship energy
    electric energy supply
    ship charging station
    Opis:
    In terms of electric ship energy requirement in navigation, the ship charging station location is especially important. In this paper, a multi-period ship charging station location optimization model is pro-posed to make location decision in overall, from initial possible station sites chosen to the capacity determination for the final location sites. In the first phase, from the perspective of external environment, find out all possible ship charging station candidate sites through the feasible analyze. In the second phase, taking the ship charging demands into consideration, the final ship charging station sites can be selected among the candidate sites based on backup coverage model. In the last phase, regarding the cost of construction and service capability for different grade as the main factor in capacity determination, the optimal capacity of each final ship charging station are determined by means of optimization method. Finally, an example of Yanqi lake in China is used to verify the validity of the proposed methodology. The reasonable location of charging station could ensure the electric energy supply and avoid congestion caused by ship charging gathering. The model can be easily generalized to other problems regarding facility allocation based on user demand.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 323-327
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selection of measuring equipment in assembly process - analysis of selected elements
    Dobór wyposażenia pomiarowego w procesach montażowych - analiza wybranych elementów
    Autorzy:
    Jarysz-Kamińska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/327994.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    wyposażenie pomiarowe
    właściwości metrologiczne
    okrętowy układ napędowy
    measuring equipment
    metrological characteristics
    ship propulsion system
    Opis:
    The paper presents function of selection of measuring equipment - DWP function. Analysis of the individual elements of described the function can be used for isolation the most important measurement components of the selection of measuring equipment for selected measurement processes. The paper shows one chosen element of function of selection of measuring equipment - metrological characteristics. Those characteristics are shown on the example of chosen measuring equipment which is used in the alignment deviation measurements carried out during the assembly of elements of the ships propulsion system.
    W artykule przedstawiono funkcję doboru wyposażenia pomiarowego - funkcja DWP. Analiza poszczególnych elementów przedstawionej funkcji może służyć wyodrębnieniu najistotniejszych składników doboru wyposażenia pomiarowego dla wybranych zadań pomiarowych. W artykule zobrazowano jeden z elementów funkcji doboru wyposażenia pomiarowego - właściwości metrologiczne. Charakterystyki te przedstawiono na przykładzie wyposażenia pomiarowego wykorzystywanego w trakcie pomiarów odchyłki współosiowości realizowanych w trakcie montażu elementów okrętowego układu napędowego.
    Źródło:
    Diagnostyka; 2011, 3(59); 47-52
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical evaluation of propriety of measurements of ship’s movement parameters
    Autorzy:
    Charchalis, A.
    Polanowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/244984.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    diagnostics
    vessel’s propulsion systems
    ship propulsion characteristics for ships with fixed propeller modelling
    determination of power characteristics
    Opis:
    The paper presents some problems of carrying out measurements of energetic characteristics and vessel’s performance in the conditions of sea examinations. As the object of propulsion characteristic determination was selected the ship with fixed pitch propeller. In order to formulate models of power characteristics, in first, known physical aspect were taken and subsequently statistic theory was implemented. Models of propulsion performance were built basing on two theoretical methods of determination of required shaft power and torque at a hub, as the function of propeller’s revolutionary speed and sailing condition represented by dimensionless coefficients. Model number one, based on Silukov method presents function with variable power index, of shaft power in domain of revolutionary speed. The second one presents model of torque variations, based on Silovic – Fancev method. For verification of models were taken presented in available bibliography, results of researches of ship’s propulsion systems [6]. We also discuss the manner of reducing the results of measurements to the standard conditions. We present the way of preparing propulsion characteristics and the analysis of examination uncertainty for the measurement of torque. Statistical analysis of deviation of results, using three models, proposed in the paper. As a result of analysis, one point from primary data set was rejected due to its unreliability, what was resulting with higher adequacy of characteristics.
    Źródło:
    Journal of KONES; 2016, 23, 1; 83-89
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recommendations for Training of Crews Working on Diesel-Electric Vessels Equipped with Azimuth Thrusters
    Autorzy:
    Pipchenko, O. D.
    Tsymbal, M.
    Shevchenko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/116343.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    diesel-electric vessels
    azimuth thrusters
    crew training
    ship propulsion
    power plant system
    azimuth propulsion
    risk matrix
    emergency steering
    Opis:
    This study addresses the problem of training the officers, which are assigned to an electrical-driven vessels equipped with azimuth thrusters. A pair of omnidirectional thrusters in combination with power plant system containing several diesel generators imply a potential for a variety of different emergency scenarios, which also includes partial or full loss of control or blackout. These fault scenarios were classified in the article with predefined risk levels depending on the area, time limitation, mode of operation and fault itself. Mutual responsibilities and action algorithms for bridge and engine teams in a step-by-step manner have been developed for each scenario. Personnel behavioral differences in both expected and unexpected emergencies have also been studied.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 567-571
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The analysis of overall ship fuel consumption in acceleration manoeuvre using hull-propeller-engine interaction principles and governor features
    Autorzy:
    Zeraatgar, Hamid
    Ghaemi, M. Hossein
    Powiązania:
    https://bibliotekanauki.pl/articles/258468.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    modelling and simulation
    fuel consumption
    hull-propeller-engine interactions
    ship propulsion system
    governor
    control strategy
    Opis:
    The problem of reduction of greenhouse gas emissions in shipping is currently addressed by many research works and related industries. There are many existing and visionary technologies and ideas, which are conceptually defined or practically realised. This goal can be achieved in different ways, and reducing fuel consumption is one of the major methods. In these circumstances, the aim of this study is to analyse the possibility of fuel consumption reduction by using an alternative control strategy for low-speed marine diesel engines which would take into account the interactions between hull, propeller and main engine. For this purpose, a mathematical model including ship hull and propulsion system is developed. A case study is conducted for a ship for which the results of both the ship hull and screw propeller model tests are available. A low-speed two-stroke diesel engine is then selected for the considered ship. Two different governors are included in the model and their parameters are changed to investigate the dynamic behaviour of the system when simulating the forward acceleration mode in calm sea conditions. The research is mainly focused on variations of fuel consumption by the ship passing a certain distance to reach the nominal constant speed. It is concluded that, for a given travel distance, it is possible to save considerable amount of fuel at the expense of slight increase of journey time.
    Źródło:
    Polish Maritime Research; 2019, 1; 162-163
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The microprocessor device for measurements of torque and rotational speed on the propeller shaft of ship
    Urządzenie do pomiaru momentu i prędkości obrotowej na wale śruby napędowej statku
    Autorzy:
    Morawski, L.
    Szuca, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/158019.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    okrętowy układ napędowy
    silnik napędu głównego
    pomiar momentu
    momentomierz
    ship's propulsion unit
    main engine
    torquemeter
    Opis:
    The paper presents the new model of torque meter designed in Gdynia Maritime University and Research-Production Enterprise for Maritime Industry "ENAMOR" Ltd., Gdynia. The general idea of measurement makes use of the torsion angle measured on a shaft section (400 mm) using the photo-optical technique. Torque meter unit is equipped with Programmable Logic Device (PLC) for calculations, external parameters acquisition (ex.: speed, trim, shaft generator power etc.) and measured data storage in memory. This unit (bearing a symbol ETNP-8) has also possibility to measure instantaneous fluctuations of the torque and engine rotational speed as a function of the shaft rotation angle. Displaying time-histories of those parameters on the monitor screen of an external PC computer gives the operator an opportunity to make a preliminary performance assessment for each individual cylinder in the engine, and for the drive system as a whole. As an example, the analysis and processing of the measured torque and rotational speed fluctuations are presented. The measurements were done on the training ship m/s Horyzont II, owned by the Gdynia Maritime University.
    Referat przedstawia urządzenie do pomiaru momentu i prędkości kątowej na wale śruby, wykorzystujące fotooptyczny pomiar kąta skręcenia wału. Na podstawie mierzonych czasów trwania zębów i szczelin dwóch tarczy zębowych wyznaczana jest prędkość obrotowa, moment i moc na wale oraz teoretyczne zużycie paliwa. Dołączony do urządzenia zewnętrzny komputer PC, z odpowiednim oprogramowaniem umożliwia pomiar wartości chwilowych momentu i prędkości obrotowej w funkcji kąta położenia wału korbowego. Pomiary wartości chwilowych zawierają informację diagnostyczną o pracy układu napędowego statku.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 12, 12; 5-7
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Model of Ship Propulsion Systems Operating Process
    Model procesu eksploatacji układu napędowego statku
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/360243.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    proces eksploatacji
    proces semimarkowski
    układ napędowy statku
    EXPLO-SHIP 2004
    operation process
    semi-Markov process
    ship propulsion system
    Opis:
    The paper contains a formal description of ship propulsion systems operation process. The model of the process is presented in the form of two-dimensional stochastic process of which coordinates are semi-Markov processes of the final states set. The former process describes the process of changes in technical states of ship propulsion systems, the latter - the process of changes in their operating states. A monovariate model of ship propulsion systems operation process has also been proposed.
    Podano opis formalny procesu eksploatacji układów napędowych statków. Model tego procesu przedstawiono w formie dwuwymiarowego procesu, którego współrzędnymi są procesy semi-Markowa o skończonych zbiorach stanów. Jeden z tych procesów jest procesem zmian stanów technicznych układów napędowych a drugi - procesem zmian ich stanów eksploatacyjnych. Zaproponowano także jednowymiarowy model procesu eksploatacji układów napędowych statków.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 211-220
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model for predicting the ship speed in the actual weather conditions on the planned ocean route
    Autorzy:
    Szelangiewicz, Tadeusz
    Żelazny, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/27315862.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    ocean route
    ship speed
    wind
    current
    wave
    ship propulsion
    trasa oceaniczna
    prędkość statku
    wiatr
    prąd
    fale
    siłownie okrętowe
    Opis:
    While operating the ship, one of the most important tasks is forecasting the ocean route. The vessel's speed characteristics are used to predict the route. Commonly used are very simplified algorithms for calculating those characteristics in which only a few basic ship parameters are used. The article presents a more detailed mathematical model for forecasting the speed of the ship in real weather conditions. This model requires more detailed geometric data of the ship and its propulsion (propeller and propulsion engine), but this data is available for operating ships.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 105-112
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vessel main propulsion engine performance evaluation
    Autorzy:
    Borkowski, T.
    Kowalak, P.
    Myśków, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/247310.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship main propulsion
    marine diesel engine
    Energy Efficiency Design Index
    Opis:
    In general, the performance of a ship in service is different from that obtained on shipyard sea trial. Apart from any differences due to loading conditions, and for which due correction should be made, these differences arise principally from the weather, fouling and surface deterioration of the hull and propeller. The influence of the weather, both in terms of wind and sea conditions, is an extremely important factor in ship performance analysis. Consequently, the weather effects needs to be taken into account if a realistic evaluation is to be made. The primary role of the ship service analysis is a standard of performance data, under varying operational and environmental conditions. The resulting information, derived from this data, becomes the basis for operational and chartering decision. In addition, the part for the data records is to enable the analysis of trends of either the hull or machinery, from which the identification of potential failure scenarios and maintenance decisions can be derived. The traditional method of data collection is the deck and engine room log records, and this is the most commonly used method today. In terms of data processing and capabilities, this method of data collection is far from ultimate, since involves significant data distortion risk. Instrumentation errors are always a potential source of concern in performance analysis methods. Such errors are generally in the form of instrument drift or gross distortion of the reading. However, these can generally be detected by the use of trend analysis techniques. The procedure for the evaluation of the ship's service performance, that relies on proven methods of main propulsion engine service data analysis used and applied for container vessel - small feeder. The vessel is equipped with indirect main propulsion, driven by means of modern medium speed engine. The different approach demonstrated to achieve the reliable and accurate main engine performance. The difference in developed engine power has been found, that corresponds well to registered sea trial results and engine retrofitting reports done, in order to limit the effective power.
    Źródło:
    Journal of KONES; 2012, 19, 2; 53-60
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The development of specialized ships propulsion systems with the aim of improving their manoeuvring ability in the aspect of navigation safety
    Rozwój układów napędowych specjalistycznych statków w celu podniesienia ich zdolności manewrowych w aspekcie bezpieczeństwa żeglugi
    Autorzy:
    Herdzik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/243414.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    statek specjalistyczny
    układ napędowy
    pędnik
    zdolności manewrowe
    bezpieczeństwo żeglugi
    specialized ship
    ship propulsion system
    thruster
    manoeuvring ability
    navigation safety
    Opis:
    The paper presents the development of specialized ship's propulsion system during last twenty years. It was shown some applied solutions of propulsion systems and what aims were achieved: improving of manoeuvring ability, the achievement ofpropulsion system's high efficiency in very large range from the idling to full load and the increasing of navigation safety. Ship propulsion systems are more often applied, especially for ships which operate on the sea in special ways and need: ship positioning, very high manoeuvring abilities, other ships services, self manoeuvring even for cruise ships. These propulsion systems are not needed applying the steering gears. These functions: steering and propulsion do thrusters, which in these cases are built in twin systems. It ensures possibilities of ship's propulsion (motion) keeping, even in case of failure in one propulsion system. For reason of sea traffic increasing, especially on sea area, when this traffic needs co-ordination (VTS stations), ship equipped in modern propulsion system should ensure greater navigation safety for herself and should decrease collision risk for other ships situated on this sea area. The usage high-performance and efficiency active powerplants is a key for the enlargement of the safety of sea shipping.
    W artykule przedstawiono rozwój układów napędowych specjalistycznych statków w okresie ostatnich dwudziestu lat. Podano stosowane rozwiązania oraz jakie cele udało się osiągnąć: zwiększenie zdolności manewrowych jednostek, uzyskanie wysokiej sprawności układów napędowych w szerokim zakresie obciążeń od biegu jałowego do obciążenia nominalnego oraz podniesienie bezpieczeństwa żeglugi. Układy napędowe z nowoczesnymi pędnikami są coraz powszechniej stosowane, szczególnie dla statków, które uprawiają nietypowążeglugę i wymagają: pozycjonowania jednostki, wysokich zdolności manewrowych, obsługi innych statków, samodzielnego manewrowania nawet w przypadku dużych statków pasażerskich. Układy te nie wymagają stosowania tradycyjnych maszyn sterowych. Funkcje sterowania i napędu jednostki spełniają pędniki, które z tego powodu budowane są minimum w układach podwójnych. W związku ze zwiększaniem się ruchu morskiego, szczególnie na akwenach, na których ruch ten wymaga koordynacji (stacji kierowania ruchem), statek posiadający nowoczesny układ napędowy będzie w stanie zapewnić bezpiecznążeglugę dla siebie i zmniejszyć zagrożenie kolizyjne w stosunku do wszystkich jednostek znajdujących się na danym akwenie. Stosowanie wysokosprawnych pędników aktywnych jest kluczem do zwiększenia bezpieczeństwa żeglugi.
    Źródło:
    Journal of KONES; 2007, 14, 3; 211-218
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An application of intuitionistic fuzzy analytic hierarchy process in ship system risk estimation
    Autorzy:
    Nguyen, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/244796.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    intuitionistic fuzzy sets
    risk estimation
    expert judgment
    ship propulsion system
    analytic hierarchy process (AHP)
    sea transport
    Opis:
    In this paper, we extend the analytic hierarchy process (AHP) method and the Atanassov’s intuitionistic fuzzy set (IFS) into the intuitionistic fuzzy analytic hierarchy process (IFAHP) with application in ship system risk estimation. In the safety engineering, risk estimation is in practice confronted with difficulties connected with shortage of data. In such cases, we have to rely on subjective estimations made by persons with practical knowledge in the field of interest, i.e. experts. However, in some realistic situations, the decision makers might be reluctant or unable to assign the crisp evaluation values to the comparison judgments due to his/her limited knowledge. In other words, there is a certain degree of hesitancy in human cognition and his judgment. Taking advantages of IFSs in dealing with ambiguity and uncertainty into account, the IFAHP can be used to handle with the subjective preferences of experts, who may have insufficient knowledge of the problem domain or uncertainty in assigning the evaluation values to the objects considered. This paper also develops a new knowledge-based ranking method to derive the priority vector of the hierarchy. An illustrative example of the propulsion risk estimation of container carriers operating on the North Atlantic line is given to show the applicability and effectiveness of the proposed method.
    Źródło:
    Journal of KONES; 2016, 23, 3; 365-372
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The increase of operational safety of ships by improving diagnostic methods for marine diesel engine
    Autorzy:
    Witkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/117520.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    diagnostic methods
    marine diesel engine
    main engine
    ship propulsion
    operational safety
    injection system
    damage
    fuel oil
    Opis:
    This article shows the importance of the diagnostic improvement methods of marine engines to boost the economy and safety of operation of marine cargo ships. The need to implement effective diagnostic methods is justified by presenting statistical data of marine diesel engines failure and the cost of their operation. Based on the own research has been proven, for the chosen example, that indicator diagrams and analysis of indicated parameters have limited utility in the diagnosis of damages of marine engine, although this is a method commonly used in operational practice. To achieve greater diagnostic effectiveness, when, based on indicator diagrams, are calculated and then the characteristics of heat release is analyzed - net of heat release characteristics and the intensity of the heat release, it was demonstrated. This procedure is particularly effective in the diagnosis of damage of injection system components marine diesel engine.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 317-321
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on applying the Catfish Biofuel in The Mekong Delta for The Marine Diesel Engine
    Autorzy:
    Quan, P. W.
    Phuoc, H. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/115953.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Propulsion
    marine diesel engine
    Catfish Biofuel
    Mekong Delta
    diesel oil
    Exhaust Gas
    Petrol Oil Replacement
    biofuel
    Opis:
    The manufacturing of Catfish products has been developed rapidly in the Mekong delta. Every year, about 1.2 million tons of Catfish and 150,000 tons of biofuel are produced. The biofuel B100 manufactures in Mekong delta satisfies the America standard ASTM D6751; EURO EN 14214 or Vietnamese standard TCVN 7717. Mekong delta, a lower land area, has a large inland water way system with around 100.000 river boats that operate with marine diesel engine. Using the biofuel for the marine diesel engine in area will reduce the HC, CO, SOx and NOx emission to the environment. Therefore, with a study on applying the catfish biofuel, it will reduce the climate change by the increasing of sea water level and save energy by using green energy to replace petrol oil.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 523-529
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozwój technologii siłowni okrętowych u progu XXI wieku
    Development of Ship Propulsion Plants at the Entry into the XXI Century
    Autorzy:
    Listewnik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/906520.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    turbiny gazow
    hybrydowe systemy siłowni okrętowych
    nadprzewodnikowe silniki elektryczne
    gas turbines
    ship propulsion hybrid systems
    superconductivity electric motors
    Opis:
    Artykuł określa kierunki rozwoju siłowni okrętowej po 2000 roku, analizując możliwości szerokiego zastosowania turbin gazowych do napędu statków oraz rozwój rozwiązań układów siłowni podyktowany względami bezpieczeństwa i ochrony środowiska morskiego. W ostatnim rozdziale opisano, planowane w połowie 2006 roku przez japoński koncern IHI, wprowadzenie do eksploatacji silnika elektrycznego pracującego w zakresie nadprzewodnictwa. Omówiono charakterystyczne cechy tego epokowego dokonania.
    The paper points out ways of ship propulsion developments after the year 2000, analysing the possibilities of gas turbine application for ship's propulsion, as well as the design of propulsion plants systems fulfilling safety and marine environmental aspects. The last chapter of the paper gives a general description of the introduction into the operation of an electrical motor working in the range of superconductivity by the Japanese Co. IHI. A brief characteristics of this epoch-making achievement is made.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 7 (79); 77-90
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of selected design variants of propulsion system for an inland waterways ship
    Autorzy:
    Dymarski, C.
    Rolbiecki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/259631.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    elektryczny układ napędowy
    hydrauliczny układ napędowy
    układ napędowy statku
    ship propulsion systems
    combustion-electric driving system
    combustion-hydraulic driving system
    Opis:
    In this paper are presented design assumptions and technical conditions as well as selected design versions of propulsion system for an inland waterways ship, and also a preliminary comparative analysis of two solutions. In the first version this is a combustion-electric system fitted with frequency converter and in the other - combustion-hydraulic one with hydrostatic reduction gear.
    Źródło:
    Polish Maritime Research; 2006, 1; 3-7
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eksploatacyjna metoda analizy rozkładu obciążeń użytecznych silników napędu głównego statku
    Effective Load Analysis Method of the Ship Main Propulsion Unit
    Autorzy:
    Borkowski, T.
    Kowalak, P.
    Kijewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/360565.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    okrętowe wolnoobrotowe silniki wysokoprężne
    główne napędy statków
    eksploatacja statku
    OMiUO 2005
    marine slow speed diesel engines
    ship propulsion
    vessel maintenance
    Opis:
    Okrętowe wolnoobrotowe silniki wysokoprężne stanowią zdecydowaną większość głównych napędów dla statków handlowych. Instalowane są one w najprostszych układach napędowych, gdzie silnik jest bezpośrednio połączony ze śrubą. Taki układ zapewnia najwyższą sprawność i najniższe z możliwych zużycie paliwa. Warunkiem uzyskania najlepszych rezultatów w tym zakresie jest utrzymywanie w czasie eksploatacji statku określonych zasad eksploatacji głównego napędu statku. W artykule przedstawiono uproszczoną metodę analizy istotnych wskaźników pracy głównego układu napędowego statku. Metoda może być stosowana w eksploatacji silników wyposażonych w standardowe urządzenia pomiarowe.
    The marine diesel engine today is the prime mover for ship propulsion. The most typical marine propulsion plant of modern merchant ships is a single, slow-speed turbocharged, two stroke diesel engine, directly coupled to the vessel's single, fixed or controllable pitch propeller. This configuration can provide high power outputs and improved fuel economy. The paper deals with basic ship propulsion factors used for fuel consumption calculations.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 5 (77); 121-130
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measures for estimating transport vessels operators subjective preferences uncertainty
    Autorzy:
    Goncharenko, A. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/213181.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    pseudo-entropy
    hybrid model
    subjective analysis
    prevailing preferences factor
    dominating preferences index
    ship propulsion
    main engine
    subjective preferences functions
    multialternative situations
    Opis:
    The pseudo-entropy hybrid model is suggested as the measure of uncertainty of operators' subjective preferences. Because of the introduced relative prevailing preferences factor the proposed hybrid model has advantages comparatively to the traditional measures of uncertainty in the view of Boltzmann's or Shannon 's entropy. According to the relative dominating preferences index the pseudo-entropy varies within [-1...1] showing the sign and magnitude of the relative subjective assuredness. Analytical expressions have been achieved. The theoretical concept is illustrated with examples and graphs.
    Źródło:
    Prace Instytutu Lotnictwa; 2013, 1 (228); 13-21
    0509-6669
    2300-5408
    Pojawia się w:
    Prace Instytutu Lotnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the Efficiency of a High Speed Catamaran Through the Replacement of the Propulsion System
    Autorzy:
    Melo, G.
    Echevarrieta, I.
    Serra, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/116469.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Propulsion
    Propulsion System
    High Speed Catamaran
    High Speed Craft (HSC)
    MARPOL Annex VI
    Energy Efficiency Operational Index (EEOI)
    Marine Gas Oil (MGO)
    Improving the Efficiency
    Opis:
    The high speed vessels are primarily designed for short distances services as public transport of passengers and vehicles. The range of high speed, according to the Code of high-speed vessels begins at 20 knots, which depends on the cruise speed you desire for your vessel; you will have to use the most appropriate type of propellant. In general, in the past 20 years, they have been building high-speed vessels with speeds above 33 knots, which meant installing water jet propellants coupled to powerful engines and therefore of high consumption of fuel, increasing operating costs and causing increased air pollution. Although the prices of fuel have been reduced to half, due to the sharp fall in oil prices, the consumption of fuel and the air pollution remains high at these speeds and powers used, in addition to that the reduction of the time spent on each trip is not excessive, mainly in short routes that are less than an hour . This article is about adapting a ship of high-speed service, with a maximum speed in tests of 34 knots and to reduce its operating costs (fuel, maintenance, etc.) and make it economically viable; before the transformation, this vessel was operating with a service speed of 22 knots, and with a consumption per mile of 135 litters of MGO. The transformation process has consisted by: – Replacement of the two original water jet with four shaft lines with fix pitch propeller. – Replacement of the two original main engines (2 x 6500 kW = 13000 kW) by four engines (4 x 1380kW = 5.520 kW). – Changing the underwater hull shape to fit the new propellers and maximize its efficiency. – Relocation of auxiliary engines, to achieve the most efficient trim. – Installation of two lateral propellers to improve maneuverability and shorten the total time of journey. After the reform and the return to service of the vessel with a service speed of over 22 knots, it has been verified that the consumption per mile is of 45 litters MGO, representing a reduction of 65% of consumption and even more reduction of emissions as the new engines comply with the latest regulations.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 531-535
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of properties of marine Diesel engines run on two kinds of fuel using performance indicators
    Porównanie właściwości silników okrętowych zasilanych dwoma rodzajami paliwa z wykorzystaniem wskaźników efektywności
    Autorzy:
    Adamkiewicz, A.
    Deska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/360771.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    wskaźniki efektywności
    właściwości
    morski silnik Diesla
    układ napędowy
    gazowiec
    key performance indicators
    properties
    marine diesel engine
    ship propulsion system
    gas carrier
    Opis:
    Basing on the evolution of application of different kinds of fuel supplying main engines of gas carriers, this article justifies the need to compare the qualities of these engines. Mass-size, energy and energy-ecological effectiveness indicators have been defined. Properties of self-ignition engines run on one or two kinds of fuel have been considered. Values of key performance indicators have been estimated. On the basis of the identified sets of indicators, comparative analysis of a dual fuel engine with single fuel ones has been carried out.
    Posługując się ewolucją zastosowania różnych rodzajów paliw zasilających silniki główne gazowców, w artykule uzasadniono potrzebę konfrontacji cech tych silników. Zdefiniowano wskaźniki efektywności masowo-gabarytowe, energetyczne i energetyczno-ekologiczne. Rozpatrzono cechy silników o zapłonie samoczynnym zasilanych jednym i dwoma rodzajami paliw. Oszacowano wartości kluczowych wskaźników efektywności. W oparciu o zidentyfikowane zbiory wskaźników przeprowadzono analizę porównawczą cech silnika dwupaliwowego z jednopaliwowymi.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 5-13
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja symulatora nawigacyjnego planowania podróży z wykorzystaniem modelu neuronowego układu napędu statku
    The concept of a navigational travel planning simulator using the neural model of the propulsion system of the ship
    Autorzy:
    Rudzki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/344237.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
    Tematy:
    modelowanie
    sztuczne sieci neuronowe
    układ napędu statku
    symulator
    nawigacyjne planowanie podróży
    modeling
    artificial neural networks
    ship propulsion system
    simulator
    navigational travel planning
    Opis:
    W artykule przedstawiono koncepcję symulatora nawigacyjnego planowania podróży, zbudowanego na bazie programu nawigacyjnego OpenCPN. Poprzez dodatkowy plug-in możliwości programu zostaną rozszerzone o moduł do planowania i symulacji trasy żeglugi z uwzględnieniem warunków meteorologicznych panujących na akwenie. Pozycja statku na potrzeby symulacji trasy będzie wyznaczana na podstawie przyjętego kursu zgodnie z zaplanowaną trasą oraz prędkości wyliczanej przez sztuczną sieć neuronową z uwzględnieniem warunków meteorologicznych.
    The article presents the concept of a navigation simulator for travel planning based on the OpenCPN navigation program. Through an additional plug-in the program capabilities will be extended with a module for planning and simulating shipping routes taking into account meteorological conditions on the basin. The position of the ship for the simulation of the route will be determined on the basis of the accepted course of the ship, according to the planned route and velocity calculated by the artificial neural network, taking into account the forecasted meteorological conditions.
    Źródło:
    Prace Wydziału Nawigacyjnego Akademii Morskiej w Gdyni; 2017, 32; 84-90
    1730-1114
    Pojawia się w:
    Prace Wydziału Nawigacyjnego Akademii Morskiej w Gdyni
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LNG – the dominant fuel for merchant ships by year 2025
    LNG – dominujące paliwo dla floty handlowej w roku 2025
    Autorzy:
    Listewnik, J.
    Wiewióra, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/360535.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    charakterystyka paliwa LNG
    wartość kaloryczna LNG
    przykłady zastosowań zakładu siłowni LNG
    LNG fuel properties
    calorific value LNG
    examples of LNG ship propulsion system
    Opis:
    The paper considers and analyses the application of gas (LNG) as a marine fuel for the whole of the merchant fleet. From made considerations, it is evident that up to year 2025 LNG will become a general ships fuel.
    Artykuł rozpatruje i analizuje zastosowanie gazu LNG, jako paliwa statkowego dla całej floty handlowej. Z dokonanych rozważań wynika, że do 2025 roku paliwem statkowym będzie LNG.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 78-82
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Features of load and wear of main propulsion devices on sea-going ships with piston combustion engines and their impact on changes in technical states of the systems
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259714.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    load
    reciprocating internal combustion engine
    seagoing ship
    propulsion system of a ship
    wear
    Opis:
    The paper presents the specificity of operation of propulsion systems of seagoing ships which causes the need to control the load on them, especially on their engines called main engines. The characteristics of the load on the propulsion systems, especially on the main engines as well as on the shaft lines and propellers driven by the engines, along with the process of wear in tribological joints (sliding tribological systems) of the machines have been described herein. Using examples of typical types of wear (both linear and volumetric) for the tribological systems of this sort, interpretation of states of their wear has been provided with regards to the wear levels defined as acceptable, unacceptable and catastrophic. The following hypotheses have been formulated: 1) hypothesis explaining necessity to consider the loads on the systems under operation as stochastic processes; 2) hypothesis explaining a possibility of considering the processes as stationary; and 3) hypothesis explaining why it can be assumed that a given technical state of any tribological system can be considered as dependent only on the directly preceding state and stochastically independent of the states that existed earlier. Accepting the hypotheses as true, a four-state continuous-time semi-Markov process has been proposed in the form of a model of changes in condition of a propulsion system (PS) of any ship. The model includes the most significant states affecting safety of a ship at sea, such as: s0 – PS ability state, s1 – PS disability state due to damage to the main engine (ME), s2 – PS disability state due to damage to the shaft line (SL) and s3 – PS disability state due to damage to the propeller (P). Probability of occurrence (changes) of the states has also been demonstrated.
    Źródło:
    Polish Maritime Research; 2017, 4; 57-66
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Symulacja niegotowości systemu siłowni okrętowej oparta na drzewie niezdatności
    A Simulation of the Unavailability of Marine Power Plant System Based on the Fault Tree
    Autorzy:
    Chybowski, L.
    Matuszak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/360249.pdf
    Data publikacji:
    2004
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    system energetyczno-napędowy statku
    drzewo niezdatności
    symulacja niegotowości systemu siłowni
    EXPLO-SHIP 2004
    ship power-propulsion system
    fault tree
    simulation of power plant unavailability
    Opis:
    Na przykładzie systemu energetyczno-napędowego statku wspomagającego eksplorację dna morskiego dokonano symulacji niegotowości tego systemu. Analizę wykonano opierając się na drzewie niezdatności metodą aproksymacji kresu górnego i algorytmem dokładnej kalkulacji.
    The power-propulsion system of a ship exploring seabed was used for a simulation of the unavailability of the system. The analysis was performed on the basis of a fault tree by the upper limit approximation and with the use of the accurate calculation algorithm.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 145-159
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibrations in Marine Power Transmission System
    Drgania okrętowych układów przeniesienia napędu
    Autorzy:
    Doan, D.
    Murawski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/342083.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
    Tematy:
    marine propulsion ship vibrations
    torsional vibration
    marine propulsion system
    finite element method
    drgania okrętowych układów napędowych
    drgania skrętne
    okrętowe układy napędowe
    metoda elementów skończonych
    Opis:
    Vibration analyses of marine machines and structures are one of the most important during the design process as well as during exploitation. Vibrations of ship hull (including superstructure and main engine body) are separately analysed from the vibrations of power transmission system. Vibrations of propulsion system include three types: lateral vibration, coupled axial vibration and torsional vibration. Among them, torsional vibrations are usually the most dangerous for the shaft line and the crankshaft. These vibrations may cause the increasing failure of the engine crankshaft as broken and bent shaft. Therefore, this article focuses on the study of torsional vibration of ship propulsion system. Calculation of torsional vibration of propulsion system with a medium-speed main engine is presented. The analysis is based on finite element method, with the code written in Matlab software. The result of this paper is applied for the tugboat with the engine of power 350 HP.
    Analizy drgań okrętowych maszyn i konstrukcji są jednymi z najważniejszych podczas procesu projektowania oraz ich eksploatacji. Drgania kadłuba statku (z nadbudówką i korpusem silnika głównego włącznie) są analizowane oddzielnie od drgań układu przeniesienia napędu. Wyróżnia się trzy typy drgań układu napędowego: drgania giętne, sprzężone wzdłużne oraz skrętne. Wśród nich drgania skrętne są zwykle najgroźniejsze dla linii wałów wału korbowego. Mogą one zwiększyć prawdopodobieństwo uszkodzenia wału korbowego poprzez jego złamanie lub wygięcie. Z tego powodu w artykule skupiono się na analizie drgań skrętnych okrętowych układów napędowych. Zaprezentowano obliczenia drgań skrętnych układu napędowego wyposażonego w średnioobrotowy silnik główny. Analizę przeprowadzono metodą elementów skończonych, której procedura została napisana w programie Matlab. Zastosowano ją do obliczeń holownika wyposażonego w silnik o mocy 350 HP.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Gdyni; 2017, 100; 37-50
    1644-1818
    2451-2486
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Gdyni
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling the dynamics of ships with different propulsion systems for control purpose
    Autorzy:
    Gierusz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259918.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship dynamics
    simulation model
    pod propulsion
    conventional propulsion
    tests results
    Opis:
    Two different propulsion systems are analyzed from point of view of future control applications. The traditional one consists of a pushing single screw propeller and a blade rudder. The other system is based on pod (pods): pulling or pushing ones. The equations describing forces and moments generated in both systems, are presented. Exemplary results of a simulation in comparison to the real-time experiments for two ships are also shown.
    Źródło:
    Polish Maritime Research; 2016, 1; 31-36
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of hull biofouling on parameters characterising ship propulsion system efficiency
    Autorzy:
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259814.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship
    hull
    biofouling
    propulsion system
    efficiency
    Opis:
    One of most important issues concerning technical objects is the increase of their operating performance. For a ship this performance mainly depends on the efficiency of its main propulsion system and the resistance generated during its motion on water. The overall ship resistance, in turn, mainly depends on the hull friction resistance, closely related with the presence of different types of roughness on the hull surface, including underwater part biofouling. The article analyses the effect of hull biofouling on selected parameters characterising the efficiency of the ship propulsion system with adjustable propeller. For this purpose a two-year research experiment was performed on a sailing vessel during its motor navigation phases. Based on the obtained results, three groups of characteristics were worked out for different combinations of engine rotational speed and adjustable propeller pitch settings. The obtained results have revealed that the phenomenon of underwater hull biofouling affects remarkably the parameters characterizing propulsion system efficiency. In particular, the development of the biofouling layer leads to significant reduction of the speed of navigation.
    Źródło:
    Polish Maritime Research; 2014, 4; 27-34
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of the probability of propulsion loss by a seagoing ship based on expert opinions
    Autorzy:
    Brandowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/258638.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship
    loss of propulsion
    probability
    estimation
    expert
    Opis:
    The event of the loss of propulsion function has been defined as hazardous event to a seagoing ship. It has been formalized. The procedure of acquisition of expert opinions on frequency of the event occurrence has been described. It may be considered to be of a numerical-fuzzy character. The fuzzy part was transferred to the numerical form by the pair comparison method. An example of the ship propulsion system comprising a low speed internal combustion engine and a fix pitch propeller illustrates the method presented. It may be used wherever a hazard analysis has to be performed of a system involving human and technical aspects and there is a shortage of objective data on the investigated object.
    Źródło:
    Polish Maritime Research; 2009, 1; 73-77
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wielokryterialny wektor efektywności napędu statku morskiego floty wsparcia marynarki wojennej
    Multicriterial vector of efficiency of propulsion marine fleet of naval support
    Autorzy:
    Łosiewicz, Z.
    Mironiuk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/314448.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    efektywność napędu
    transport
    statek morski
    efficiency of propulsion
    ship
    Opis:
    W artykule omówiony został wielokryterialny wektor efektywności napędu statku morskiego - na przykładzie statków floty wsparcia marynarki wojennej.
    In this paper we discuss the multi-criterion vector of maritime ship propulsion efficiency - on the example of ships navy support fleet.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 592-594, CD
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic analyses of ships shafts lines
    Autorzy:
    Grządziela, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/241759.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    ship propulsions
    dynamic analyse
    propulsion system
    Simulink software
    Opis:
    Ships' propulsion plant usually works in a hard environment caused by static forces and permanent dynamic loads. Exciding of tolerated values of shaft alignments causes a damage of radial and thrust bearings in relative short time. Modelling of dynamical reactions could bring information to the designer for recognizing the level of hazard for propulsion system. Knowledge of a character of dynamic loading which affects ship shaft line can make it possible to identify potential failures by means of on-line vibration measuring systems. This way elimination of costly and time-consuming overhauls on dock leads to lowering operational costs and increasing ship fighting merits. A paper presents a proposal of identification of a degree of hazard to ship shaft line due to forces of shafts misalignment. A theoretical analysis was made of influence of changes in co - axiality of shafts resulting from elastic deformations of hull structure in vicinity of shaft bearing foundations. The main problem of naval vessels is a lack of dynamical requirements of stiffness of the hull. Modelled signals were recognized within sensitive symptoms of two sub models: model of propulsion system and model of shaft's misalignment. Both sub models allow testing forces and their responses in vibration spectrum using SIMULINK software.
    Źródło:
    Journal of KONES; 2008, 15, 4; 163-170
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The application of the ahp method in ship system risk estimation
    Autorzy:
    Nguyen, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/258664.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    AHP method
    estimation
    propulsion risk
    expert courts
    ship systems
    Opis:
    The article presents procedures of application of the AHP method for estimating risks of ship systems. The estimation of system risk function parameters is done based on the data obtained from experts and processed using the pairwise comparative method.
    Źródło:
    Polish Maritime Research; 2009, 1; 78-82
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design methodology for small passenger ships on the example of the ferryboat Motława 2 driven by hybrid propulsion system
    Autorzy:
    Gełesz, P.
    Karczewski, A.
    Kozak, J.
    Litwin, W.
    Piątek, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/259617.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    small passenger ships
    urban ship
    design methodology
    hybrid propulsion system
    Opis:
    Dynamic development in practically all fields of science and engineering has not passed over shipbuilding . In last years, engineers got to their use computer software which makes it possible to perform strength and hydrodynamic calculations as well as to visualize design projects in 3 D space [1-4]. At their disposal they have full spectrum of modern solutions associated with the use of advanced materials and technologies [5-7]. More and more attention is also paid to impact onto the natural environment [8,9]. Every new object must influence the environment as low as possible, beginning from building phase through its service life up to final utilization – such approach is called „green-shipping”. However , not only practical reasons are important . Clients , i.e. ship owners and passengers of ships paid more and more attention to image of floating units. During decision taking on that from whom a transport service has to be ordered , the most modern ships of an attractive image matching with place and time, are often taken into consideration. Such situation has become a basis for an idea of working out a concept of a new ferryboat for National Maritime Museum. As the ferry has to navigate in „the heart of the town”, then , apart from strictly marine and engineering aspects , an important factor of its designing is its expected image - a set of significant meanings and emotions written in architecture language. The new ferryboat , like its historical predecessors , will never leave urban water routes.
    Źródło:
    Polish Maritime Research; 2017, S 1; 67-73
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilisation of data base in preliminary design of marine power plant
    Autorzy:
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/244415.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ships propulsion
    Marine Power Plant
    database
    ship’s general dimensions
    Opis:
    The paper presents general rules of utilization of database, called „significant ships list,” for preliminary design of ship’s propulsion and configuration of power plant. Knowledge collected in the database is related to new buildings classified according to type, displacement, shipping class etc. It encompass general dimensions, characteristics of mobility ,propulsion’s power and type of main engines and propulsors, electric power plant, boilers and main mechanisms of a power plant. In the paper is presented method of utilization of the significant ships list during design of a container ship with capacity of 1300 TEU and speed of 18 knots. The first step of propulsion and main engine’s selection is determination of main dimensions, i.e. displacement, length, draft and breadth. That dimensions cannot be selected random way, due to hull’s mobility, stability and durability constraints. The list of significant ships consisted of 30 units, and amongst them, 17 were selected and analyzed. Others were rejected because of significant difference from mean values what could be due to different class of the ships.
    Źródło:
    Journal of KONES; 2014, 21, 1; 43-48
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer simulator of a model ship’s unmanned movement
    Autorzy:
    Szelangiewicz, Tadeusz
    Żelazny, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/135658.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    experimental model of an unmanned ship
    ship’s manoeuvring equations
    propulsion system
    computer simulator
    mathematical model of the ship
    unmanned ship
    Opis:
    As part of this research, an experimental model of an unmanned ship equipped with an ecological electric drive was built. Ultimately, the ship model was equipped with an on-board computer with appropriate software for autonomous control. A computer simulator was used to test the control software. This article presents the concept of such a simulator, a general mathematical model of the movement dynamics of an unmanned vehicle, a description of the propulsion system, and the tasks planned for implementation in a computer simulator.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 59 (131); 34-40
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Service margin - solution of the problem or a problem waiting for solution?
    Autorzy:
    Stasiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/962777.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    sea-going ship
    design
    seagoing qualities
    resistance
    main propulsion horsepower
    service margins
    Opis:
    Subiect of the paper is the problem of predicting sea-going ship resistance and/or horsepower in real operating conditions. Attention is drawn first of all to the need and possibility of revising the very much outdated but still used "service margin" method, which consists in adding an arbitrary percentage margin to the value of resistance or horsepower, relatively precisely determined for the calm water conditions. A negative impact in this respect is shown of the generally used delivery-acceptance procedures, where particular importance is attached to the ship propulsion tests on the "measured mile". The need of revising the "service margins" is a consequence of an obvious need for most efficient ships from the technical as well as economic point of view. Secondly, it is a "must" of permanent improving the ship design quality - the adequacy and accuracy of design methods. The work presents the "wave service margin" coefficient models. It is assumed that they may contribute to the necessary rationalization of the procedure of real ship resistance and/or horsepower determination. The work is based on the results of resistance tests of a series of ships designed within the Baltecologicalship project. The tests were carried out in the Chair of Ship Theory and Design of the Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology.
    Źródło:
    Polish Maritime Research; 2004, S 1; 29-33
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An approximate method for calculating the mean statistical service speed of container ships on a given shipping line and its application in preliminary design
    Autorzy:
    Szelangiewicz, T.
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/135192.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    service speed
    shipping lines
    preliminary design
    container ship
    propulsion system
    weather conditions
    Opis:
    During ship design, service speed is one of the crucial parameters in determining the operational economy of the vessel. As sufficiently exact calculation methods applicable to preliminary design stage are lacking, the so-called contract speed, the speed which a ship reaches in calm water, is usually cited. Żelazny (2015) developed a parametric method for calculating total ship resistance under actual weather conditions (wind, waves, sea current). This paper presents a parametric model of a ship’s propulsion system (screw propeller – propulsion engine) as well as a method, based on both the resistance and propulsion system models, of calculating the mean statistical value of a ship’s service speed under the seasonal weather conditions occurring on shipping lines. The method makes use only of basic design parameters, and may be applied in preliminary design phase of container ships.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 34-42
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy efficiency design index of container vessel - operational approach
    Autorzy:
    Borkowski, T.
    Kasyk, L.
    Kowalak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/241715.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    ship
    main propulsion
    marine diesel engine
    Energy Efficiency Design Index
    exhaust emission
    Opis:
    The ship "Energy Efficiency Design Index (EEDI)" has been formulated by the IMO Marine Environment Protection Committee (MEPC) as a measure of the CO2 emission performance of ships. The ship EEDI is calculated based on characteristics of the ship at build, incorporating parameters including ship capacity, engine power and fuel consumption. Shipping is responsible for CO2 discharge of approximately 3.3% global emission and despite being an energy-efficient transport means, compared with other transport modes, there are opportunities for increasing energy efficiency. The EEDI requires a minimum energy efficiency level (CO2 emissions) per capacity mile (e.g. tonne mile) for different ship type and size sectors. With the level being tightened over time, the EEDI will stimulate continued technical development of all the components influencing the energy efficiency of a ship. The paper presents an overview of EEDI calculation method for container vessels and results of experimental approach. The experimental process results through comprehensive analysis of operational data, from modern container vessel, equipped with direct main propulsion unit have been introduced. Ship operators have already been implementing energy efficiency operational measures and set goals for reducing the energy consumption of their fleet. Performance and savings are not always monitored and reported. However, it can be foreseen that such activity when is successfully promoted, reduction of CO2 emissions can be achieved.
    Źródło:
    Journal of KONES; 2012, 19, 4; 93-100
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on the Propulsion Performance in the Actual Sea by means of Full-scale Experiments
    Autorzy:
    Kayano, J.
    Yabuki, N.
    Sasaki, N.
    Hiwatashi, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/116354.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Propulsion Performance
    Propulsion
    mechanical engineering
    Energy Efficiency Design Index (EEDI)
    Ship Energy Efficiency Management Plan (SEEMP)
    Energy Efficiency Operational Indicator (EEOI)
    Self Propulsion Factors
    Power Curves
    Opis:
    The IMO has adopted Energy Efficiency Design Index (EEDI), Ship Energy Efficiency Management Plan (SEEMP) and Energy Efficiency Operational Indicator (EEOI) in order to reduce GHG emissions from international shipping. And, the shipping industry is required to develop and improve the energy saving ship operation technologies to meet the above IMO guideline. The weather routing is one of the energy saving navigation technologies and widely adopted by oceangoing merchant ships. The effectiveness of the weather routing mainly depends on the accuracy of weather forecast data and the ship’s propulsion performance prediction. The propulsion performance in the actual sea is usually predicted using the Self Propulsion Factors obtained by model tests. It is necessary to understand the propulsion performance characteristics in the actual sea conditions for the improvement of propulsion performance prediction. From the above points of view, the authors performed full‐scale experiments using a training ship in order to investigate the propulsion performance characteristics in the actual sea. This paper describes the analysis results on the characteristics of Power Curves and Self Propulsion Factors under various weather and sea conditions.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 521-526
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Load analysis of propulsion engine during ships speed acceleratio
    Autorzy:
    Rosłanowski, J.
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246664.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    load propulsion engine
    ship's speed acceleration
    control engine operation
    running non-overload engine
    Opis:
    The following paper presents load analysis of propulsion engine during ship's speed acceleration. This process is carried out after manoeuvring in order to receive, as fast as possible, exploitation speeds of the ship, achieved during the voyage. The analysis concerns direct propulsion power system of low-speed engine of constant pitch propeller. Wrong steering process of engine load changes in temporary states, can cause engine overloading, as the result of its operation on the external limiting characteristic and can end up in engine seizure. Control of engine operation is carried on through selecting of adequate setting of rotational speed governor, which for specified external conditions can result in adequate position of fuel link and the choice of adequate fuel index arm dose. Equalization of the power delivered by the engine in given conditions of work with power required by the ship’s propeller cooperating with the hull, will establish adequate rotational speed of the engine and finally the speed of the vessel. In order to speed up the sip's motion, there must occur an overflow of propeller thrust over the required thrust (resistance) and this, in turn, is connected with the necessity to ensure the engine power surplus over the power required for a given range of operation or in other words sailing speed. This article presents the working model of ship propelling system during speed acceleration and concerns mainly nonoverload running of the engine. The model described above has been verified during tests in real conditions at sea.
    Źródło:
    Journal of KONES; 2012, 19, 2; 443-448
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda określania zapotrzebowania energii do napędu statku, energii elektrycznej i wydajności kotłów dla nowoczesnych statków pasażerskich przy wykorzystaniu metod statystycznych
    Method of determining energy demand for main propulsion, electric power and boiler capacity for modern cruise liners by means of statistic methods
    Autorzy:
    Giernalczyk, M.
    Górski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/360271.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    statek pasażerski
    napęd główny
    kotły
    elektrownia
    passenger ship
    main propulsion
    boilers
    electric power
    Opis:
    W artykule przedstawiono oryginalną metodę określania zapotrzebowania energii do napędu statku, energii elektrycznej oraz wydajności kotłów dla nowoczesnych statków pasażerskich, na etapie wstępnego projektowania statku przy wykorzystaniu metod statystycznych.
    The article presents an original method of determining energy demand for ship propulsion, electrical power and boiler capacity for modern cruise liners at the preliminary stage of ship designing by means of statistic methods of calculations.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2008, 14 (86); 9-13
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability evaluation of electrochemical energy storage systems supplying the ships main propulsion system
    Autorzy:
    Szewczyk, P.
    Łebkowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201455.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    reliability assessment
    electric propulsion system
    energy storage systems
    electric ship
    reliability block diagram
    probability of failure occurrence
    hybrid electric-propulsion system
    Opis:
    The paper presents the structure of hybrid and electric modern ship propulsion systems. Types and configuration of electrochemical cells for selected electric energy storage facilities on the ship were presented. The method and results of reliability analyses, such as failure mode effect analysis (FMEA), reliability block diagram (RBD) and fault tree analysis (FTA), used to estimate the probability of failure of the energy storage systems supplying the ship's main propulsion, are presented. Methods of evaluation and verification of the proposed reliability model using a laboratory model and available operational and service data are discussed. A proposal for a quantitative risk analysis of potential damage during the operation of the energy storage has been presented.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 87--94
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MUTSU
    Autorzy:
    Rzymkowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/950376.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    statek z napędem jądrowym
    napęd jądrowy
    statek MUTSU
    nuclear ship
    nuclear propulsion
    sjhip MUTSU
    Opis:
    Opisano historię japońskiego eksperymentalnego statku MUTSU z napędem jądrowym.
    History of Japanese experimental ship MUTSU with nuclear propulsion is described.
    Źródło:
    Postępy Techniki Jądrowej; 2017, 1; 31-35
    0551-6846
    Pojawia się w:
    Postępy Techniki Jądrowej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analyzing the feasibility of an unmanned cargo ship for different operational phases
    Autorzy:
    Røstum Bellingmo, P.
    Wille, E.
    Nordahl, H.
    Mørkrid, O. E.
    Holte, E. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201463.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    autonomous ship
    navigation
    cargo handling
    mooring
    communication
    power and propulsion
    technical feasibility
    regulatory feasibililty
    Opis:
    The maritime industry has begun to look into autonomous ships as an alternative to conventional ships due to growing pressure to reduce the environmental impact of maritime transportation, to increase safety, to mitigate the growing challenges in recruiting seafarers, and to increase profit margins. There is a lot of research on the challenges and feasibilities of an autonomous ship. However, there is less discussion on the transition from manned to unmanned ships and the tasks that are feasible to automate before the whole ship is unmanned. This paper investigates the technical and regulatory feasibility of automating different tasks for different operational phases for a large cargo ship. This study shows that a fully unmanned cargo ship is not feasible today, but that some tasks can be automated within the next five years.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 397--404
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of the Probability of Propulsion Loss by a Seagoing Ship Based on Expert Opinions
    Autorzy:
    Brandowski, A.
    Frackowiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/117585.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Probability
    Propulsion Loss
    estimation
    seagoing ship
    Expert Opinion
    Hazard Analysis
    Immediate Catastrophic Failure (ICF)
    Risk Analysis
    Opis:
    The event of the loss of propulsion function has been defined as hazardous event to a seagoing ship. It has been formalized. The procedure of acquisition of expert opinions on frequency of the event occurrence has been described. It may be considered to be of a numerical-fuzzy character. The fuzzy part was transferred to the numerical form by the pair comparison method. An example of the ship propulsion system comprising a low speed internal combustion engine and a solid propeller illustrates the method presented. It may be used wherever a hazard analysis has to be performed of a system involving human and technical aspects and there is a shortage of objective data on the investigated object.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 449-454
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of the Calculated Wind Loads to the Power Generated by the Main Propulsion and Thrusters of the Ship with the Results of Simulation Tests
    Autorzy:
    Formela, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/116285.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    marine simulation
    port maneuvers
    ship's movement
    main propulsion
    thruster
    simulation tests
    Port of Gdynia
    wind loads
    Opis:
    One of the main factors affecting the safe port maneuvers by ships is wind, which directly affects the ship's movement. The article presents a comparison of calculated wind loads to the power generated by thrusters and the main propulsion of the ship with the results of simulation tests in order to determine the safe wind force limits allowing safe port maneuvers with a particular ship model.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 315-319
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Drag and Torque on Locked Screw Propeller
    Autorzy:
    Tabaczek, T.
    Bugalski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117621.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ship Operation
    Locked Screw Propeller
    Propulsion System
    Propeller Drop
    Propeller Torque
    CFD Computations
    Hydrodynamics
    Sailboat Fixed Blade Propeller
    Opis:
    Few data on drag and torque on locked propeller towed in water are available in literature. Those data refer to propellers of specific geometry (number of blades, blade area, pitch and skew of blades). The estimation of drag and torque of an arbitrary propeller considered in analysis of ship resistance or propulsion is laborious. The authors collected and reviewed test data available in the literature. Based on collected data there were developed the empirical formulae for estimation of hydrodynamic drag and torque acting on locked screw propeller. Supplementary CFD computations were carried out in order to prove the applicability of the formulae to modern moderately skewed screw propellers.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 441-447
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda określania zapotrzebowania energii do napędu statku, energii elektrycznej i wydajności kotłów dla nowoczesnych zbiornikowców do przewozu ropy naftowej i jej produktów przy wykorzystaniu metod statystycznych
    A Statistics-based Method for the Determination of Energy Demand for Main Propulsion, Electric Power Production and Boiler Capacities for Modern Crude Oil and Products Tankers
    Autorzy:
    Giernalczyk, M.
    Górski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/359483.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    zbiornikowiec
    EXPLO-SHIP 2006
    ropa naftowa
    napęd główny
    kotły
    elektrownia
    crude oil tanker
    main propulsion
    electric power
    boilers
    Opis:
    W artykule przedstawiono oryginalną metodę określania zapotrzebowania energii do napędu statku, energii elektrycznej oraz wydajności kotłów dla nowoczesnych zbiornikowców do przewozu ropy naftowej i jej produktów, na etapie wstępnego projektowania statku, przy wykorzystaniu metod statystycznych.
    This article presents a method of estimating main propulsion power, electrical power and boiler capacities of modern crude oil and products tankers using statistic methods of calculations.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 183-192
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problemy rozdziału wektora sterującego między pędniki w systemach dynamicznego pozycjonowania statków
    Problems of steering vector allocation to thrusters in ships dynamic positioning systems
    Autorzy:
    Herdzik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/312055.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    napęd statku
    pędniki okrętowe
    dynamiczne pozycjonowanie statków
    dokładność pozycjonowania
    propulsion system
    ship propellers
    dynamic positioning ships systems
    positioning accuracy
    Opis:
    W referacie przedstawiono problemy rozdziału wektora sterującego między dostępne pędniki układu napędowego i pozycjonowania przy spełnieniu określonych ograniczeń. Konieczne jest spełnienie warunku minimalnej sumarycznej mocy wymaganej z pędników, co pozwala na uzyskanie minimum zużycia paliwa. Analiza komplikuje się ze zwiększeniem liczby pędników w układzie pozycjonowania, ich rozmieszczeniem oraz dostępnością. Odpowiednie oprogramowanie systemów sterowania umożliwia uzyskanie wymaganej dokładności pozycjonowania lub utrzymania kursu, co jest warunkiem podstawowym na statkach specjalistycznych z systemami dynamicznego pozycjonowania klasy 2 i 3.
    Paper discussed the problems of steering vector allocation to thrusters in ship's dynamic positioning systems to the demanded quality of station keeping taking into account the required limitations. The main challenge is minimum of delivered power that allows to get the minimum of total fuel consumption. The analysis is complicated due to increasing the number of thrusters, their allocation and accessibility. The software of dynamic positioning systems ought to allow the keeping of required position or heading what is a basic condition for DPS class 2 and 3.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 637-644
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrodynamic characteristics of the propulsion thrusters of an unmanned ship model
    Autorzy:
    Szelangiewicz, Tadeusz
    Żelazny, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/906104.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    experimental model of an unmanned ship
    propulsion system
    hydrodynamic characteristics of propellers
    azimuthal propeller
    tunnel thruster
    measurements of propeller characteristics
    Opis:
    In this paper, an experimental model has been developed to study an unmanned ship. Two aft azimuthal propellers and two bow tunnel thrusters were used to propel the ship. In order to develop algorithms and a computer program to control the model, it is necessary to determine the hydrodynamic characteristics of the propellers installed in the model. The propellers are very small; therefore it is impossible to use approximate methods of calculating the thrust of the ship’s propellers. The characteristics of the thrust of the propellers installed in the model were measured experimentally. This paper has given a description of the test stand and the results of the measurement of the thrust forces of the propellers installed in the model of an unmanned ship.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 62 (134); 136-141
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring system of extreme loadings of propulsion system’s foundation : design assumptions
    Autorzy:
    Kyzioł, L.
    Murawski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/242588.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    marine structural health monitoring
    propulsion system diagnostic
    marine engines’ foundations
    underwater explosion
    ship grounding
    optical time-domain reflectometer
    Fibre Bragg Grating
    Opis:
    Project of on-line diagnostic (monitoring) system of marine propulsion system working parameters is the authors' general target. Proper propulsion system’s foundation is one of the most important parameters for its reliable operation. Different types of quasi-static loadings and dynamic excitations can be observed during ships exploitation. Presented research has been limited to extreme loadings. Underwater explosions or ship groundings are considered examples of extreme foundation loadings. Analysis of the physical parameters of the extreme forces has been presented in the first part of the paper. Water pressure spatial and non-spatial (time) distribution during underwater explosion has been analysed as an example. Short overview of the dynamic mathematical models of underwater explosions is presented. Time function of vibrations acceleration of ship construction is important design assumption of planned Structural Health Monitoring (SHM) system. Propulsion system's foundation loading measurements should take into account general ship hull deformation (in the aft part of the ship) as well as reactions changes of main engine and shaft line bearings. Ship hull deformation should be monitored as quasi-continuous measurements, along whole propulsion system. Optical Time-Domain Reflectometer method (OTDR) is planned for hull deformation monitoring. Propulsion system bearings' reactions are a source of local foundation pads' strain changes. Fibre Bragg Grating (FBG) sensors are the best for that kind of measurements, in authors opinion. Both techniques (OTDR and FBG) have been shortly described in the paper. Scheme of monitoring system of marine propulsion systems foundation's loadings are proposed in the end of the article.
    Źródło:
    Journal of KONES; 2013, 20, 1; 155-162
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of hull’s resistance at preliminary phase of designing
    Autorzy:
    Charchalis, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246841.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    seagoing ship
    hull coefficient
    hull dimensions parameters
    hull resistance
    propulsion power
    statek morski
    współczynnik kadłuba
    wymiary kadłuba
    parametry
    odporność kadłuba
    siła napędowa
    Opis:
    In this paper are presented the methodology of calculation of hull resistance components, principal parameters of a vessel, necessary for calculation of displacement in relation to vessel’s type. That methodology concerns analysis of designing ways at early stage of ship’s power calculation. Ship owners' preliminary assumptions for new ship consist of deadweight (for container vessel load capacity TEU), speed shipping line and others. Taking it as a base, in early stage of design one has to select propulsion type. This goal needs definition of principal dimensions of a vessel, which are the base for further calculations of hull’s resistance and evaluation of necessary power of main engine (engines) to fulfil shipping requirements. In the paper, are presented major constraints for designing of new vessels coming from ship-owner assumptions such as seafaring limitations and safety of shipping regulations due to Classification Societies Rules or coming out from designing experience. In the paper are presented components of ship’s resistance and methods of total resistance calculations what is a basis for power calculation and propulsion designing. Moreover, are presented results of calculations of resistance components of different types of ships, and variety of displacement and sailing velocity. It has to be assumed, that presented method concerns preliminary design stage and can vary from different ships classes and constructions of hulls.
    Źródło:
    Journal of KONES; 2017, 24, 1; 77-82
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Average fuel consumption by a ship on a sales line in statistical weather conditions
    Autorzy:
    Szelangiewicz, T.
    Żelazny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315961.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    zużycie paliwa
    prędkość statku
    moc napędowa
    linie żeglugowe
    średnie statystyczne parametry pogodowe
    fuel consumption
    ship speed
    propulsion power
    shipping lines
    average statistical weather parameters
    Opis:
    During operation of the ship, fuel consumption and associated emissions are very important for economic and ecological reasons. The fuel consumption is greatly influenced by the choice of shipping route, weather conditions on these routes and engine control criteria. The article presents its own algorithm for forecasting ship operation parameters, including fuel consumption on selected shipping routes for average, statistical (seasonal) weather parameters occurring on these routes. It shows what factors have the main impact on fuel consumption and how you can affect fuel consumption during the cruise in changing weather conditions.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 573-579
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Trendy rozwoju układów napędowych gazowców LNG
    Developments of Propulsion Systems of LNG Carriers
    Autorzy:
    Chądzyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/359459.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    LNG
    EXPLO-SHIP 2006
    ubytki ładunku
    układ napędowy
    układ ponownego skraplania
    turbina parowa
    silnik spalinowy dwupaliwowy
    boil-off
    propulsion system
    reliquefaction plant
    steam turbine
    dual fuel diesel engine
    Opis:
    Zdolności przewozowe światowej floty gazowców LNG rosną gwałtownie, a ilość zamówień na nowe statki wzrasta bardzo dynamicznie. Niewykluczone, że budowa gazowców LNG zostanie podjęta także w naszym kraju. W niniejszej pracy zostaną przedstawione wymagania, jakie stawiane są przed układem napędowym gazowca LNG, sposoby wykorzystania naturalnych ubytków LNG podczas rejsu, warianty możliwych do zastosowania układów napędowych wraz z ich cechami eksploatacyjnymi, szkic założeń do badań nad optymalnym rozwiązaniem układu napędowego w powiązaniu z wielkością statku.
    The global LNG shipping capacity is growing sharply and the number of ordered LNG carriers is very high at the moment. It is possible that Poland will appear among experienced builders of those ships. The author considers the requirements for propulsion systems of modern LNG carriers, the methods of utilising boil-off gas, different alternatives of power sources. Besides, the paper introduces a preliminary idea of research on an optimal solution of propulsion system closely related with the size of the vessel.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2006, 10 (82); 139-150
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-92 z 92

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