Fuel Cells and Hybrid Systems
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In order to develop a new fuel cell and/or to enhance fuel cell performance, it is very important to understand clearly what the real performance of a fuel cell is. However, some important issues for the assessment of a fuel cell performance still require additional considerations. For example, the performance of a fuel cell is generally described based on an isothermal condition in spite of the non-uniform cell temperature distributions under real operating conditions. Also, it is necessary to reveal the real difference in the performance of a fuel cell and a heat engine. Understanding of the purpose of the hybridization of a fuel cell with a heat engine is another important issue. In the present study, issues related to the performance of a fuel cell are considered from a thermodynamic point of view.