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    Wyświetlanie 1-4 z 4
    Tytuł:
    Triple-layer based control strategy for molten carbonate fuel cell - hybrid system
    Autorzy:
    Milewski, J.
    Miller, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/185632.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    strategia kontroli
    control strategy
    solid oxide fuel cell
    off-design operation
    Opis:
    Based on mathematical modelling and numerical simulations, a control strategy for a Molten Carbonate Fuel Cell Hybrid System (MCFC-HS) is presented. Adequate maps of performances with three independent parameters are shown. The independent parameters are as follows: stack current, fuel mass flow and compressor outlet pressure. Those parameters can be controlled by external load, fuel valve and turbine-compressor shaft speed, respectively. The control system is purposed to meet many constraints: e.g. stack temperature, steam-to-carbon ratio, compressor surge limitation, etc. The aim is to achieve maximum efficiency of power generated within these constraints. Governing equations of MCFC-HS modelling are given. An operational line of the MCFC-GT system is presented which fulfils several constraints (temperature difference, cell temperature, etc.) The system is able to achieve efficiency of more than 62% even in part-load operation.
    Źródło:
    Chemical and Process Engineering; 2012, 33, 3; 445-461
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the structure of an intelligent locomotive DSS and assessment of its effectiveness
    Autorzy:
    Gorobchenko, Oleksandr
    Nevedrov, Oleksandr
    Powiązania:
    https://bibliotekanauki.pl/articles/1833630.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intelligent locomotive
    intelligent system
    assessment effectiveness
    control strategy
    train
    inteligentna lokomotywa
    inteligentny system
    ocena sprawności
    strategia kontroli
    pociąg
    Opis:
    The purpose of the article is developing the locomotive structure of intellectual system of support of decision-making and to find a criterion by which to adequately assess different control action to the train. System of decision support for locomotive crew is seen as a complex structure with complex interactions located at a great distance, on-board locomotive systems. The quality of the organization determines the effectiveness of the system as a whole. To solve the problem of creating the optimal structure of the DSS applies the aggregate-decomposition method that involves two steps: decomposition of the problem into a number of subproblems and aggregating the partial results. To evaluate the quality control of a locomotive used the concept of control strategy with specific indicators. Design is developed and structure of locomotive DSS is obtained, taking into account peculiarities of operation of railway transport. To account for not only quantitative but also qualitative characteristics of activity of the locomotive or intellectual systems of decision support, it is proposed to use methods of fuzzy logic. So were able to deduce and calculate the additive criterion of the quality control activities of the intelligent system. Formal indicator of the quality of the train control process using different strategies is received. In the work theoretically grounded definition of the weighting factors for each partial criterion of the quality of train control. Using the dependencies derived, the nature of the influence of the value of partial criteria on the quality of train control in relation to a strategy. The results of the work allow to more accurately simulate the operations of a locomotive crew, which in the future will serve as the basis for the development of autonomous intelligent systems of locomotive control. The developed method is shown to be three main criteria which values the safety, energy consumption, and execution time schedule. However, for more flexible and accurate model, this approach allows to enter additional criteria, and the simplicity of the calculation provides the necessary speed when implemented on on-board locomotive computers.
    Źródło:
    Archives of Transport; 2020, 56, 4; 47-58
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors influencing the hybrid drive of urban public transport buses
    Czynniki wpływające na napęd hybrydowy stosowany w autobusach publicznego transportu miejskiego
    Autorzy:
    Barta, D.
    Mruzek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/409736.pdf
    Data publikacji:
    2015
    Wydawca:
    STE GROUP
    Tematy:
    control strategy
    combustion engine
    hybrid drive
    public transport
    bus
    strategia kontroli
    silnik spalinowy
    napęd hybrydowy
    transport publiczny
    autobus
    Opis:
    The efficiency of each drives is dependent on many factors. Hybrid drives and specially the drives of urban public transport may be affected by other factors given by transport infrastructure or operational conditions. These factors condition the suitable configuration of the individual elements of hybrid drive and the establishment of good control strategy of such drive. The study of influencing factors of the control strategy is the aim of this paper.
    Efektywność poszczególnych napędów jest zależna od wielu czynników. Na napędy hybrydowe, a w szczególności te stosowane w publicznym transporcie miejskim mogą mieć wpływ inne czynniki, wynikające z infrastruktury transportowej lub warunków eksploatacyjnych. Te czynniki warunkują odpowiednią konfigurację poszczególnych elementów napędu hybrydowego oraz ustanowienie dobrej strategii kontroli takiego napędu. Celem niniejszego opracowania jest badanie czynników wpływających na strategię kontroli.
    Źródło:
    Management Systems in Production Engineering; 2015, 4 (20); 213-218
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical study on control strategy of a single cell proton conducting solid oxide fuel cell
    Autorzy:
    Szczęśniak, Arkadiusz
    Powiązania:
    https://bibliotekanauki.pl/articles/41176203.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Warszawska, Instytut Techniki Cieplnej
    Tematy:
    solid oxide fuel cell
    H+SOFC
    control strategy
    numerical simulations
    ogniwo paliwowe ze stałym tlenkiem
    strategia kontroli
    symulacje numeryczne
    Opis:
    The aim of the paper is to examine a control strategy for a single proton conducting solid oxide fuel cell (H+SOFC). The study is based on a dynamic model originating from the steady state reduced order model of H+SOFC. The proposed control strategy is based on a singular PID controller that controls the amount of air delivered to the cathode side of the fuel cell. Additionally, fuel mass flow is correlated with current density to achieve a fixed fuel utilization factor. The concept was tested on typical operating scenarios such as load-follow mode. The study revealed that the singular PID controller is reliable and ensures a safe H+SOFC operation.
    Źródło:
    Journal of Power Technologies; 2022, 102, 4; 1-8
    1425-1353
    Pojawia się w:
    Journal of Power Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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