The following paper develops tools using energy and exergy analysis of heat engine and fuel cell based CHP systems to determine which type should be used to minimize fuel consumption and CO2 production. In the near future, physical plant and energy resource managers will have to decide how to satisfy electrical power requirements and reduce CO2 and other “greenhouse gas” emissions. Preliminary results demonstrate these tools provide useful information and indicate that heat engine based cogeneration devices are more desirable than the fuel cell based devices for systems with a large heat load to require power ratio. Fuel cell cogeneration devices are preferred for systems with a large power requirement as compared to the heat load.

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