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    Wyświetlanie 1-9 z 9
    Tytuł:
    CFD modelling of hydrogen starvation conditions in a planar Solid Oxide Fuel Cell
    Autorzy:
    Pianko-Oprych, P.
    Zinko, T.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/779053.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    planar Solid Oxide Fuel Cell
    fuel starvation
    current density
    CFD modelling
    Opis:
    The aim of this study was to highlight the interest of using CFD technique as a diagnostic tool of a malfunctioning Solid Oxide Fuel Cells. Hydrogen starvation of a SOFC due to nitrogen dilution is one of the cell dysfunctions and can lead to its degradation. Identification of the starvation point allows to improve cell performance and establish the best conditions for degradation tests. To illustrate a potential of the CFD tool, several simulations of a single planar SOFC and its behaviour under hydrogen starvation were performed and analysed. The results showed that at lower cell voltage values of 0.3 and 0.5 V significant gradients in the electric current were noticed due to a local reduction in hydrogen concentration. The CFD analysis allowed defining desirable mass flow rate of hydrogen to SOFCs to avoid fuel starvation. The model constitutes a helpful tool for optimizing cell design and operational conditions.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 2; 16-25
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of SOFCs based power generation system using Aspen
    Autorzy:
    Pianko-Oprych, P.
    Palus, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778251.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Solid Oxide Fuel Cell system
    modelling
    methane
    reforming
    CPOx
    Opis:
    This study presents a thermodynamic Aspen simulation model for Solid Oxide Fuel Cells, SOFCs, based power generation system. In the first step, a steady-state SOFCs system model was developed. The model includes the electrochemistry and the diffusion phenomena. The electrochemical model gives good agreement with experimental data in a wide operating range. Then, a parametric study has been conducted to estimate effects of the oxygen to carbon ratio, O/C, on reformer temperature, fuel cell temperature, fuel utilization, overall fuel cell performance, and the results are discussed in this paper. In the second step, a dynamic analysis of SOFCs characteristic has been developed. The aim of dynamic modelling was to find the response of the system against the fuel utilization and the O/C ratio variations. From the simulations, it was concluded that both developed models in the steady and dynamic state were reasonably accurate and can be used for system level optimization studies of the SOFC based power generation system.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 4; 8-15
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantification of the Radiative and Convective Heat Transfer Processes and their Effect on mSOFC by CFD Modelling
    Autorzy:
    Pianko-Oprych, P.
    Kasilova, E.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/778685.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    microtubular Solid Oxide Fuel Cell stack
    heat transfer
    computational fluid dynamics (CFD)
    temperature distributions
    Opis:
    The CFD modelling of heat transfer in a microtubular Solid Oxide Fuel Cell (mSOFC) stack has been presented. Stack performance predictions were based on a 16 anode-supported microtubular SOFCs sub-stack, which is a component of the overall stack containing 64 fuel cells. Both radiative and convective heat transfer were taken into account in the modelling. The heat flux value corresponded to the cell voltage of 0.7 [V]. Two different cases of the inlet air velocity of 2.0 and 8.5 [ms–1] were considered. It was found that radiation accounted for about 20–30 [%] of the total heat flux from the active tube surface, which means that the convective heat transfer predominated over the radiative one.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 2; 51-55
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelowanie procesów w mikrorurowym stałotlenkowym ogniwie paliwowym
    Modelling of processes in a microtubular Solid Oxide Fuel Cell
    Autorzy:
    Pianko-Oprych, P.
    Kasilova, E.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2072287.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    mikrorurowe stałotlenkowe ogniwo paliwowe
    modelowanie numeryczne
    CFD
    solid microtubular oxide fuel cell
    numerical modeling
    Opis:
    W pracy przedstawiono pierwszy etap opracowanej strategii modelowania, obejmujący zastosowanie dwuwymiarowego modelu numerycznego mikrorurowego stałotlenkowego ogniwa paliwowego. Zastosowane kody obliczeniowe numerycznej mechaniki płynów (CFD) umożliwiły ilościowy opis nieliniowych relacji pomiędzy parametrami: temperaturą, ciśnieniem, strumieniami substratów i produktów.
    Paper presents the first stage of developed modeling strategy, including the use of two-dimensional numerical model of the solid microtubular oxide fuel cell. Codes used in computational fluid dynamics (CFD) allowed a quantitative description of the non-linear relationship between parameters: temperature, pressure, substrate and product streams.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2013, 5; 462--464
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of the steady-state behaviour of a new design of a single planar Solid Oxide Fuel Cell
    Autorzy:
    Pianko-Oprych, P.
    Zinko, T.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/778012.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    planar Solid Oxide Fuel Cell stack
    computational fluid dynamics (CFD)
    voltage-current
    characteristics
    temperature distributions
    Opis:
    The aim of the work was to develop a mathematical model for computing the steady-state voltage – current characteristics of a planar Solid Oxide Fuel Cell and to determine the performance of a new SOFC design. The design involves cross-flow bipolar plates. Each of the bipolar plates has an air channel system on one side and a fuel channel system on the other side. The proposed model was developed using the ANSYS-Fluent commercial Computational Fluid Dynamics (CFD) software supported by additional Fuel Cell module. The results confirm that the model can well simulate the diagonal current path. The effects of temperature and gas flow through the channels and a Membrane Electrode Assembly (MEA) structure were taken into account. It was shown that a significant increase of the MEA temperature at high current density can lead to hot spots formation and hence electrode damage.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 1; 64-71
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model development of integrated CPOx reformer and SOFC stack system
    Autorzy:
    Pianko-Oprych, P.
    Hosseini, S. M.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/779855.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Catalytic Partial Oxidation (CPOx) reformer
    Solid Oxide Fuel Cell (SOFC) stack
    stead and dynamic mode
    modelling
    Opis:
    The main purpose of this study was to develop a mathematical model, in a steady state and dynamic mode, of a Catalytic Partial Oxidation (CPOx ) reformer – Solid Oxide Fuel Cell (SOFC) stack integrated system in order to assess the system performance. Mass balance equations were written for each component in the system together with energy equation and implemented into the MATLAB Simulink simulation tool. Temperature, gas concentrations, pressure and current density were computed in the steady-state mode and validated against experimental data. The calculated I–V curve matched well the experimental one. In the dynamic modelling, several different conditions including step changes in fuel flow rates, stack voltage as well as temperature values were applied to estimate the system response against the load variations. Results provide valuable insight into the operating conditions that have to be achieved to ensure efficient CPOx  performance for fuel processing for the SOFC stack applications.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 4; 41-46
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of the numerical studies on planar and tubular solid oxide fuel cells within four EU projects of the 7th framework programme
    Autorzy:
    Pianko-Oprych, P.
    Jaworski, Z.
    Zinko, T.
    Palus, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185086.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Solid Oxide Fuel Cell
    stack
    fuel cell system
    Computational Fluid Dynamics
    CFD
    Finite Element Method
    FEM
    modelling
    process simulation
    ogniwo paliwowe z tlenkiem stałym
    system ogniw paliwowych
    obliczeniowa dynamika płynów
    metoda elementów skończonych
    MES
    modelowanie symulacje procesu
    Opis:
    The paper addresses the issues of quantification and understanding of Solid Oxide Fuel Cells (SOFC) based on numerical modelling carried out under four European, EU, research projects from the 7FP within the Fuel Cell and Hydrogen Joint Undertaking, FCH JU, activities. It is a short review of the main projects’ achievements. The goal was to develop numerical analyses at a single cell and stack level. This information was integrated into a system model that was capable of predicting fuel cell phenomena and their effect on the system behaviour. Numerical results were analysed and favourably compared to experimental results obtained from the project partners. At the single SOFC level, a static model of the SOFC cell was developed to calculate output voltage and current density as functions of fuel utilisation, operational pressure and temperature. At the stack level, by improving fuel cell configuration inside the stack and optimising the operation conditions, thermal stresses were decreased and the lifetime of fuel cell systems increased. At the system level, different layouts have been evaluated at the steady-state and by dynamic simulations. Results showed that increasing the operation temperature and pressure improves the overall performance, while changes of the inlet gas compositions improve fuel cell performance.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 4; 377--393
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CFD Analysis of Heat Transfer in a Microtubular Solid Oxide Fuel Cell Stack
    Autorzy:
    Pianko-Oprych, P.
    Kasilova, E.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/185553.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    przenikanie ciepła
    strata ciepła
    rozkład temperatur
    microtubular Solid Oxide Fuel Cell stack
    heat transfer
    heat losses
    temperature distributions
    computational fluid dynamics (CFD)
    Opis:
    The aim of this work was to achieve a deeper understanding of the heat transfer in a microtubular Solid Oxide Fuel Cell (mSOFC) stack based on the results obtained by means of a Computational Fluid Dynamics tool. Stack performance predictions were based on simulations for a 16 anodesupported mSOFCs sub-stack, which was a component of the overall stack containing 64 fuel cells. The emphasis of the paper was put on steadystate modelling, which enabled identification of heat transfer between the fuel cells and air flow cooling the stack and estimation of the influence of stack heat losses. Analysis of processes for different heat losses and the impact of the mSOFC reaction heat flux profile on the temperature distribution in the mSOFC stack were carried out. Both radiative and convective heat transfer were taken into account in the analysis. Two different levels of the inlet air velocity and three different values of the heat losses were considered. Good agreement of the CFD model results with experimental data allowed to predict the operation trends, which will be a reliable tool for optimisation of the working setup and ensure sufficient cooling of the mSOFC stack.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 3; 293-304
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional modelling of thermal stresses in a planar solid oxide fuel cell of a novel design
    Modelowanie 3D termicznych naprężeń w płaskim stałotlenkowym ogniwie paliwowym o nowatorskiej konstrukcji
    Autorzy:
    Zinko, T.
    Pianko-Oprych, P.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/408754.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    planar Solid Oxide Fuel Cell
    thermal stresses
    residual stresses
    finite element method
    computational fluid dynamics (CFD)
    płaskie stałotlenkowe ogniwo paliwowe
    naprężenie termiczne
    naprężenie szczątkowe
    Metoda Elementu Skończonego
    Numeryczna Mechanika Płynów
    Opis:
    The presented modelling investigation was carried out to analyze thermal stresses and expansion in an anode supported planar Solid Oxide Fuel Cell (pSOFC). The temperature distribution was based on previously developed thermo-electrochemical model predicting fuel cell operation. The design of a single pSOFC consisted of three ceramic layers of membrane electrode assembly: anode, electrolyte, cathode and two cross-flow bipolar plates with 26 ribs. The gases flowed diagonally from one cell corner to the opposite one. The fuel and air flows were cross-wise opposed on each bipolar plate side. The study allowed to indicate the most vulnerable to thermal damage area of the fuel cell in the operating conditions. The results will be useful in further design modification and performance optimization of the SOFC.
    Przeprowadzone symulacje numeryczne miały na celu analizę termicznych naprężeń i ocenę stopnia wydłużenia płaskiego stałotlenkowego ogniwa paliwowego typu pSOFC (ang. planar Solid Oxide Fuel Cell). Rozkład temperatury w ogniwie wyznaczono w oparciu o wcześniej opracowany model termiczno-elektrochemiczny [11]. Nowatorskie rozwiązanie ogniwa typu pSOFC objęło ceramiczną konstrukcję, w skład której weszły porowate elektrody – anoda i katoda, elektrolit oraz dwie płytki bipolarne z 26-cioma żebrami. Przepływ paliwa i powietrza odbywał się krzyżowo i przeciwprądowo, po przekątnej ogniwa. Wyniki symulacji pozwoliły na określenie obszarów ogniwa narażonych na uszkodzenie w wyniku wysokich wartości naprężeń termicznych. Uzyskane rezultaty FEM umożliwią dalszą modyfikację konstrukcji płaskiego ogniwa w celu optymalizacji wydajności pSOFC.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2016, 1; 69-72
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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