Abstract
In this chapter, exergy analyses are presented of a several fuel cell systems: a proton exchange membrane (PEM) fuel cell power system for a light-duty fuel cell vehicle, a combined solid oxide fuel cell (SOFC)-gas turbine system, a molten carbonate fuel cell, and a cogeneration system integrating an ammonia fuel cell and an internal combustion engine. Parametric studies are also conducted to investigate the effect of operating-condition variations on the performance of the systems. The fuel cell is an electrochemical energy conversion device, which converts the chemical energy of hydrogen directly and efficiently into electrical energy while emitting only waste heat and liquid water. Fuel cells are considerably efficient and generate electricity in one step, with no moving parts. Fuel cells operate at low temperatures in some instances and high temperatures in others.
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