Wyniki wyszukiwania - BazTech

1

Opracowanie modelu dynamicznego stosu węglanowych ogniw paliwowych

Dybiński Olaf, Szczęśniak Arkadiusz, Milewski Jarosław

Rynek Energii

|

2019

|

Nr 5

52--61

PL

W artykule przedstawiono wyniki pracy polegającej na opracowaniu modelu dynamicznego węglanowych ogniw paliwowych oraz jego weryfikacji przy wykorzystaniu rzeczywistych danych pomiarowych. Na podstawie danych wejściowych w postaci parametrów gazów na wlocie do katody i anody opracowany model umożliwia badanie stanów nieustalonych pracy stosu ogniw paliwowych, w tym parametrów gazów na wylocie z katody i anody, a także krzywych prądowo napięciowych możliwych do uzyskania z ogniwa. Do obliczeń wykorzystane zostało oprogramowanie Aspen Hysys. Wyniki uzyskiwane przy pomocy modelu zostały porównane z rzeczywistymi danymi pomiarowymi uzyskanymi z badania referencyjnego stosu ogniw paliwowych o mocy 1 kW. Przeanalizowano dwa stany pracy ogniwa: stan ustalony i stan nieustalony (proces rozruchu). Zaprezentowano wykresy wyników pomiarowych i obliczeniowych.

EN

The paper presents results of work involving development of a dynamic model of molten carbonate fuel cells, both with its verification using experimental data. On the basis of input parameters (supplied gases on the inlet to cathode and anode channel and current drawn from fuel cells) the model calculates the real-time stack response, i.e. stack voltage, parameters of outlet gases allowing for transient states of MCFC stack analysis. Aspen Hysys software was used for the calculations. The results obtained using the model were verified with real measurement data obtained from a reference test of a 1 kW fuel cell stack. Two cell operating states were analyzed: steady state and transient (startup process). Graphs of measurement and calculation results are presented.

2

Design of open-porous materials for high-temperature fuel cells

Wejrzanowski T., Ibrahim H., Cwieka K., Milewski J., Kurzydlowski K. J.

Journal of Power Technologies

|

2016

|

Vol. 96, nr 3

178--182

EN

Microstructure is one of the major factors influencing material properties. It is especially important for open-porous materials dedicated to catalytic applications, where fraction of pores, their size distribution and specific surface influence the diffusion of reactants and the kinetics of catalytic reactions. In these studies the numerical models of the microstructure of open-porous electrodes for molten carbonate fuel cell (MCFC) are presented. The models presented here simulate fabrication routes for real materials, including mixing of powders, tape casting and sintering processes. The substrate powders are represented by spheres with defined size distribution. Mixing and compaction of powders with polymeric binder is simulated by a granular model implemented in LAMMPS code. In the next step the polymeric phase represented by fine particles and larger porogen addition is removed to form pores. The sintering process is simulated by geometry smoothing, which results in sphere aggregation. The models presented here were compared with micro computed tomography (µCT) 3D images of real MCFC materials. Quantitative analysis of µCT images was performed and it was demonstrated that algorithms used in these studies make it possible to design materials with the desired porous microstructure.

3

Capturing exhaust CO2 gas using molten carbonate fuel cells

Dhawan P., Kapoor A. U.

Advances in Science and Technology. Research Journal

|

2016

|

Vol. 10, nr 29

147--151

EN

Carbon dioxide is considered as one of the major contenders when the question of greenhouse effect arises. So for any industry or power plant it is of utmost importance to follow certain increasingly stringent environment protection rules and laws. So it is significant to keep eye on any possible methods to reduce carbon dioxide emissions in an efficient way. This paper reviews the available literature so as to try to provide an insight of the possibility of using Molten Carbonate Fuel Cells (MCFCs) as the carbon capturing and segregating devices and the various factors that affect the performance of MCFCs during the process of CO2 capture.

4

Analiza i porównanie układów energetycznych zawierających węglanowe ogniwo paliwowe

Wołowicz M., Milewski J., Badyda K.

Rynek Energii

|

2014

|

Nr 4

66--73

PL

W artykule przedstawiono analizę i porównanie układów energetycznych zawierających węglanowe ogniwo paliwowe. Omówiono różne konfiguracje takich układów poczynając od najprostszej, czyli ogniwa pracującego samodzielnie, a kończąc na hybrydowych układach z turbiną gazową, parową i powietrzną. Omówiono również główne parametry pracy układów energetycznych z węglanowym ogniwem paliwowym istotne z punktu widzenia usytuowania ogniwa paliwowego w takim układzie. Wytypowano główne parametry, które są uniwersalne dla każdego układu energetycznego współpracującego z ogniwem. Są to: ilość paliwa jakie zostało utlenione w procesach elektrochemicznych zachodzących w ogniwie (zarówno całkowita jak i procentowa), temperatura pracy ogniwa, ciśnienie pracy i straty ciśnienia, sprawność i moc ogniwa.

EN

The article presents an analysis and comparison of molten carbonate fuel cell hybrid systems. Discusses the different configurations of such systems starting from the simplest, ie. independently working fuel cell and ending with the hybrid systems containing gas, steam and air turbine. It also discusses the main parameters of the energy systems containing molten carbonate fuel cell relevant to the location of the fuel cell in such system. Main parameters that are universal for all the systems are presented and described. These are: the amount of fuel that has been oxidized in the electrochemical processes occurring in the fuel cell (both total and percentage), the fuel cell operating temperature, operating pressure and pressure loss, cell efficiency, power of the fuel cell.

5

Wetting behavior of molten alkali carbonates on Au interface under various gas atmospheres

Godula-Jopek A., Suski L.

Polish Journal of Chemistry

|

1998

|

Vol. 72, nr 6

1045-1053

EN

Wettability of gold by molten (Li+Na), (Li+K) and (Li+Na+K) carbonate eutectic systems has been measured by sessile-drop method, as relevant to the problem of adhesion at the molten electrolyte/solid interfaces in molten carbonate fuel cell. The parameters determined and the literature surface tension data have been used for calculation of the adhesion work parameters for interfaces under study.