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    Wyświetlanie 1-9 z 9
    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:
    Redundancy as a way increasing reliability of ship power plants
    Autorzy:
    Tarelko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315952.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    redundancja
    niezawodność
    elektrownia okrętowa
    redundancy
    dependability
    ship power plant
    Opis:
    One of key ways of assuring a high level of reliability of a ship power plant is to design redundancy of its structural elements, for example redundancy of prime drivers, drivelines etc. This paper deals with issues related to the redundancy as a way increasing dependability of the ship power and propulsion systems. Especially, fundamental characteristics of dependability, major design strategies influencing the reliability, and types of redundancies related to ship power and propulsion systems are presented.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 515-522
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of redundancy in ship power plants of offshore vessels
    Autorzy:
    Tarelko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/27315942.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    redundancja
    niezawodność
    elektrownia okrętowa
    statek przybrzeżny
    reliability
    ship power plant
    offshore vessel
    Opis:
    Power and propulsion systems of offshore units must be of a very high level of reliability. The loss of ability to perform functions of their components causes generally to very high economic losses, which may be increased by unused the weather window resulting to postponing the planned offshore operations. To ensure carrying out so expensive offshore operations in the most reliable way, various types of redundancies are built-in ship power plants. This paper deals with issues related to application of redundancy in ship power plants of offshore vessels. Especially, evolution of redundancy application in ship power plants, and design solution of redundancy for offshore vessels are presented. Moreover, the specifics of these offshore operations so important from the point of view of minimizing financial losses due to any interruptions caused by failures of power and propulsion systems are discussed in detailed way.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 443-452
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zarys historii pojęć związanych z projektowaniem maszyn
    Brief history of terminologies connected with machine design
    Autorzy:
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/196324.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    projektowanie
    konstruowanie
    terminologia
    historia
    design
    project
    terminology
    history
    Opis:
    W artykule przedstawiono zarys historii pojęć związanych z projektowaniem maszyn, w szczególności zaś omówiono rozwój terminologii technicznej i naukowej w powiązaniu z rozwojem cywilizacji technicznej oraz zaprezentowano zasady przyjmowania nazewnictwa technicznego na ziemiach polskich w okresie rewolucji przemysłowo-technicznej. Ponadto przedstawiono w ujęciu historycznym dzieje terminu „projekt”, wskazując początek jego współczesnego znaczenia. W zakończeniu artykułu zaprezentowano obecne znaczenie pojęć projektowania i konstruowania stosowanych w ojczystej literaturze przedmiotowej, a także ich interpretacje w literaturze anglojęzycznej.
    A brief history of terms connected with machine design is presented in this paper. Particularly, the development of technical and scientific terminology as a consequence of technical civilization growth and principles of taking Polish technical nomenclature in a period of the Industrial Revolution are described. Moreover, a trace of the term ‘project’ is presented in the historical view with indication of its genesis. In conclusion, senses of terms ‘project’ and ‘design’ applied in Polish subject bibliography are presented together with their interpretation in English.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2014, 83; 279-286
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The thermal state modelling of cylinder liner of marine two-stroke combustion engine
    Autorzy:
    Kowalski, J.
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259669.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    silniki okrętowe
    elementanre metody równowagi
    stan cieplny
    tuleja cylindrowa
    ship engine
    elementary balance method
    thermal state
    cylinder liner
    Opis:
    This paper presents a two-dimensional model of heat flow through structural elements of cylinder of two-stroke cross-head engine of longitudinal scavenging, obtained with the use of the elementary balance method. Special attention was paid to the modelling of temperature distribution within engine cylinder liner of "wet" construction. For modelling the unsteady heat flow multi-dimensional equations with Dirichlet - Fourier boundary conditions, were used. For the Fourier boundary conditions in the engine cylinder space local values of convective and radiant heat-transfer coefficients were applied. For calculations the KM3R method of solving differential equations, based on the elementary balance method, was used. Modelling results have been presented in the form of the temperature field of engine cylinder structural elements in function of the changeable angle of crankshaft position.
    Źródło:
    Polish Maritime Research; 2006, 2; 15-20
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Management of assignment of operational tasks realized in ship power plant
    Autorzy:
    Kamiński, P.
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/258526.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship power plant
    management
    Opis:
    The frequent cause of ships’ detentions by port authorities are abnormalities of ship power plant functioning. Each extended ship lay time in port results in waste of ship operating time thus costs rise to shipowners. This is connected with improper ship power plant management. In order to avoid this, a ship engineer should have at his disposal computer aided system supporting him in managing of ship power plant. Such a system can be worked out on condition that mathematical formula which represents the decision – making process of an engineer has been built. The present work shows approache to the problem according to the situation in which the engineer is made to take certain decisions. In formulation of the most substantial operating states of a ship like lay time in harbour and sea voyage the ‚knapsack algorithm’ was applied. For both approaches objective function was formulated.
    Źródło:
    Polish Maritime Research; 2008, 1; 42-51
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of hazard to operator during design process of safe ship power plant
    Autorzy:
    Kowalewski, T.
    Podsiadło, A.
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259383.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    safety
    design process
    ship power plant
    hazard
    fuzzy inference
    Opis:
    This paper presents comparison of two methods for assessment of hazards to ship power plant operator, used in the preliminary stage of ship power plant design process: the matrix method and that based on fuzzy logic. And, it reports this way results of realization of the research projects [1, 2] financed by Polish Ministry of Science and Higher Education.The assessment of hazard to ship power plant operator, carried out at preliminary design stages meets certain difficulties resulting from that information connected with his safety are scarce or associated with high uncertainty. Therefore fuzzy logic was decided to be used to safety assesment. It was found out that at preliminary design stages application of the fuzzy-logic-based assessment yielded better results as compared with the classic matrix method.
    Źródło:
    Polish Maritime Research; 2010, 4; 26-30
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of fuzzy inference to assessment of degree of hazard to ship power plant operator
    Autorzy:
    Kowalewski, T.
    Podsiadło, A.
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259595.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    safety
    operator
    ship power plant
    assessment
    fuzzy inference
    Opis:
    This paper presents application of fuzzy logic to assessment of degree of hazard to ship power plant operator. For the assessment a system of computer-aided identification of hazardous zone within ship power plant, was used. The system’s variables representing the subject-matter knowledge in safety design area were transformed into fuzzy sets by means of appropriate linguistic variables and membership functions. The assessing of safety level of operator with the use of fuzzy inference was performed by means of an expert system programmed in the PROLOG LPA language.
    Źródło:
    Polish Maritime Research; 2007, 3; 7-11
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A method for determining the decision variables of hazardous zone identification system for ship power plant operator
    Autorzy:
    Kamiński, P.
    Podsiadło, A.
    Tarełko, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259648.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    siłownie okrętowe
    bezpieczeństwo
    operator
    czynniki niebezpieczne i szkodliwe
    strefa niebezpieczna
    procedury realizacji zadań
    zmienność decyzji
    strefa wiatrów zmiennych
    ship power plant
    safety
    hazardous and noxious factors
    hazardous zone
    task realization procedures
    decision variables
    Opis:
    In this paper a method is presented of determining - on the basis of information available in the preliminary phase of ship power plant design - the set of hazardous and noxious factors for the operator, as well as of converting them into the set of input variables to a hazardous zone identification system. Basing on the choice of values of determined decision variables, the system's user is able to determine potential hazardous zones for the ship power plant operator. Conversions of the determined factors into the set of the system's input variables were performed by using the knowledge achieved from the side of experts in ship power plant designing and operating.
    Źródło:
    Polish Maritime Research; 2006, 3; 17-25
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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