... variables. The mass flow of oxygen, hydrogen flow, water flow, and temperature were taken to be the critical dynamics in the system. The unknown parameters were estimated using the experimental data of a 1.2 kW PEMFC. The simplified model showed good agreement with experimental results. Control schemes were...

...Chen Li; Xiaoming Xu; Hao Hu; Nan Mei; Yi Yang The electrochemical reaction inside a high-power fuel cell generates a lot of heat. Excessive heat affects the performance of the membrane, so it is necessary to introduce coolant. The main objective of coolant is regulating the temperature...

... performance. Here, a detailed comparison between the agglomerate and a macrohomogeneous model is provided, elucidating the effects of the CL composition on the overall performance and the individual losses, the effects of operating temperature and inlet relative humidity on the cell performance, and the CL...

...Michael Mangold; Silvia Piewek; Olaf Klein; Achim Kienle A simple model for the start-up of a proton exchange membrane fuel cell stack is proposed. The model covers a wide temperature range from temperatures below the freezing point of water to usual operation temperatures of a low-temperature fuel...

... inlet manifold should be located far from the inlet of air, which is able to decrease the deterioration to below 3% when using nonuniform profile of pattern B. On the other hand, employing a suitable air flow rate, we can easily control the operating temperature of a solid oxide fuel cell unit...

...Hai-Bo Huo; Yan-Xiang Wu; Yu-Qing Liu; Shi-Hong Gan; Xing-Hong Kuang In this paper, a variable structure controller for temperature control of the solid oxide fuel cell (SOFC) is proposed. The performance and availability of the SOFC are greatly dependent on its operating temperature. For high...

... as a function of temperature and humidity is proposed. To this end, the G’Sell–Jonas (1979, “Determination of the Plastic Behavior of Solid Polymers at Constant True Strain Rate,” J. Mater. Sci., 14, pp. 583–591) constitutive model for semicrystalline polymers is extended by incorporating, in addition...