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    Wyświetlanie 1-5 z 5
    Tytuł:
    IMOR survey vessel diesel-electric system advantages
    Autorzy:
    Hac, B.
    Ossowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/244307.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    survey vessel
    diesel-electric system
    fuel consumption
    operational flexibility
    Opis:
    (How diesel-electric system improves reliability, operational flexibility and economy of the survey vessel IMOR) IMOR was built for Maritime Institute of Gdansk as a multi -purpose shallow water survey and ROV support twin-hull vessel. It is configured and capable of performing a range of tasks, such as: hydrographic and geophysical operations, bottom and pipeline inspection, etc. Its small size, small draught, relatively high power and great flexibility of possible applications makes it ideal for work on shallow waters and offshore projects starting onshore. It is equipped with diesel-electric propulsion system that consists of: 3 generator sets, 2 dual azipod aft active rudders - propellers, 2 dual waterjet bow thrusters. These units are powered by electric motors controlled by helmsman stand and DP system. First year of service has proven the project success. In contrast to conventional construction, both fuel consumption and pollution discharges have been reduced substantially. Additionally, manoeuvring and maintenance of the vessel has been improved. A great advantage of such system is the use of sufficient number of auxiliary diesel engines; consequently operation of all engines at a time is avoided. During idle operation or reduced speed of the vessel, it is sufficient to connect only one or two auxiliary generators which, in return, will be operated at an optimum capacity and efficiency. On demand, high speed and operation of all vessel auxiliary generators can be achieved in a few seconds. This flexibility enables substantial energy-savings and exploitation cost advantages. Other benefits may be summarized as follows: high survivability, reduction of noise and vibration, improved operational flexibility and reliability, increased flexibility and adaptability for different kind of survey works, increased space available, reduced manning and logistics.
    Źródło:
    Journal of KONES; 2007, 14, 4; 113-118
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Decision-Making Process Development for Industry 4.0 Transformation
    Autorzy:
    Sajjad, Ahmad
    Ahmad, Wasim
    Hussain, Sulman
    Powiązania:
    https://bibliotekanauki.pl/articles/2201777.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    analytical hierarchy process
    AHP
    technique for order of preference by similarity to ideal solution
    TOPSIS
    operational flexibility
    Industry 4.0
    multi-criteria decision making
    MCDM
    Opis:
    Development of design characteristics based dynamic decision support framework is presented in the current study, to facilitate the decision makers in the transformation of system in the industry 4.0 paradigm. The model development is designed for a robust decision-making approach to integrating human and machine knowledge to adopt smart technologies and system design. The system is based on prioritization of the industry 4.0 design principles and characteristics including flexibility, self-adaptability, self-reconfigurability, context awareness, decision autonomy, and real-time capabilities. It has been revealed from an industrial field study, the companies facing difficulty to transform the system, and systematics approach needed to overcome the challenge. A decision support process has been developed as an integrated approach to embedding human knowledge. The developed process has been validated using Technique for Order of Preference by Similarity to Ideal Solution, the results depict the operational flexibility, has been most crucial transformation characteristics prioritized using the Analytical Hierarchical Process. The developed process has the capability to help the system development and estimate the factors involved in the transformation.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 3; 1--11
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The problem of thermal unit elasticity under the conditions of dynamic RES development
    Problem elastyczności bloków cieplnych w warunkach dynamicznego rozwoju OZE
    Autorzy:
    Kowalczyk, T.
    Badur, J.
    Ziółkowski, P.
    Kornet, S.
    Banaś, K.
    Ziółkowski, P. J.
    Stajnke, M.
    Bryk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/397195.pdf
    Data publikacji:
    2017
    Wydawca:
    ENERGA
    Tematy:
    energy storage
    operational flexibility
    steam turbine
    gas turbine
    SOEC
    hydrogen technologies
    machine monitoring
    magazyn energii
    elastyczność pracy
    turbina parowa
    turbina gazowa
    technologie wodorowe
    monitoring maszyn
    Opis:
    The paper is an overview of selected ways of increasing the operational flexibility of steam units, which are predominant in the Polish power system. These studies were prompted by the dynamic changes in the structures of installed capacity and generation output in the National Power System due to a rapid increase in the number of wind turbines in the country. The methods of thermal unit operational flexibility improvement are divided into two groups. The first group comprises solutions with heat and mass storage as well as chemical energy storage. These are solutions to manage the auxiliary load of units regardless of system load. The second group consists of methods for an off-design increase in the safe level of thermal energy machine design stress. The development of numerical tools using complex methods of thermal stress determination, such as Burzyński-Pęcherski’s theory, combined with advanced on-line machine diagnostics, allows for an extension in the operational range of a machine, beyond the original safe operation limit without risk of damage or loss of service life, in other words.
    W pracy przedstawiono przegląd wybranych sposobów zwiększania elastyczności pracy bloków parowych, które stanowią największą siłę wytwórczą w polskim systemie elektroenergetycznym. Motywacją do podjęcia prac w tym kierunku są dynamiczne zmiany w strukturze mocy zainstalowanej i energii wytwarzanej w Krajowym Systemie Elektroenergetycznym związane z szybkim wzrostem liczby siłowni wiatrowych na terenie kraju. Metody poprawy elastyczności pracy bloków cieplnych podzielono na dwie grupy. Pierwszą grupę stanowią rozwiązania wykorzystujące magazyny ciepła i masy oraz magazyny energii chemicznej. Są to rozwiązania pozwalające kształtować obciążenie potrzeb własnych bloku niezależnie od obciążenia systemu. Drugą grupę stanowią metody pozwalające na pozaprojektowe wytężanie konstrukcji maszyn cieplnych. Rozwój narzędzi numerycznych wykorzystujących złożone metody wyznaczania naprężeń cieplnych, takie jak np. teoria Burzyńskiego–Pęcherskiego, w połączeniu z zaawansowanymi systemami diagnostyki maszyn online, umożliwiają wychodzenie z pracą maszyn poza granice tzw. bezpiecznej pracy bez ryzyka uszkodzeń lub utraty żywotności.
    Źródło:
    Acta Energetica; 2017, 2; 116-121
    2300-3022
    Pojawia się w:
    Acta Energetica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of air filter on operational properties of engine with the common rail fuel supply system
    Autorzy:
    Gołębiewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/241554.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    air filter
    operational properties of engine
    engine flexibility
    specific fuel consumption
    torque
    effective power
    Opis:
    The objective of this research project was to determine the percentage impact of dry-medium air filter being used in Fiat Multijet 1.3 JTD engine on its operational properties (engine flexibility and specific fuel consumption). Experiments were performed according to the requirements of research methods specified in the piston combustion engine standard in force. In order to make comparisons, operational parameters of the power unit (torque, effective power and specific fuel consumption) were measured with dry-medium air filter (with a new filter element) being fitted and with air filter being removed. Each point of respective characteristic curves was determined based on four measurements as their mean value. Also boost pressure, which could be of importance for results, was considered in the experiments. However, the degree of EGR valve lift, the operation of which could also appear to be important, was not taken into account. For each measuring point of respective characteristic curves, the ranges of measurement uncertainties were determined. Expanded standard uncertainties were calculated based on the Guide to the Expression of Uncertainty in Measurement. The experiments being carried out allowed concluding that the engine with air filter was less flexible by approx. 20% when compared to that without air filter, whereas its specific fuel consumption was greater by approx. 9%. The degree of air filter pollution affects its flow resistance and, which is related to this, engine torque and its effective power as well as its flexibility decrease but fuel consumption increases
    Źródło:
    Journal of KONES; 2013, 20, 1; 103-109
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compilation of operational and strategic agility for ensuring the highest efficiency of company operations
    Autorzy:
    Sajdak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/398766.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    operational agility
    strategic agility
    adaptation
    flexibility
    efficiency
    change
    sprawność operacyjna
    wydajność strategiczna
    adaptacja
    elastyczność
    wydajność
    zmiany
    Opis:
    The author of the article, using the analysis of the literature, presents the two perspectives of company’s agility – the strategic and the operational ones, and tries to make the compilation of them in order to obtain the highest effectives of the company’s performance. The article shows that on the strategic level an outwards-oriented attitude is required which involves scanning the environment and assessing the likely impact of the trends in a given industry, as well as the technological possibilities, competitive forces, market changes, and market segment dynamics. Referring to the literature the operational level agility refers to changes which occur within an organization, particularly with regard to the processes of manufacturing and innovation. Adopting an agile strategy involves a new type of activity - a transformation of internal operations. The practice shows that only the implementation of both presented perspectives of agility may lead the company to the outstanding results and ensure competitive advantage in the unstable market. The aim of this article is to identify the determinants for strategic agility and the operational agility of companies as well as attempting to combine the two areas in order to ensure the highest efficiency of enterprises.
    Źródło:
    Ekonomia i Zarządzanie; 2015, 7, 2; 20-25
    2080-9646
    Pojawia się w:
    Ekonomia i Zarządzanie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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