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Waste heat recovery of recirculated MCFC using supercritical carbon dioxide power cycle  

Lee, Jae Yoon (Graduate School, Inha University)
Ahn, Ji Ho (Graduate School, Inha University)
Kim, Tong Seop (Department of Mechanical Engineering, Inha University)
Publication Information
Plant Journal / v.15, no.2, 2019 , pp. 42-45 More about this Journal
Abstract
The molten carbonate fuel cell has a high temperature of waste heat and can constitute a bottoming cycle to increase the efficiency. Previous study used a bottoming cycle as steam turbine cycle. In this study, we are going to replace the bottoming cycle with a supercritical carbon dioxide power cycle. The system power was compared to consider replacing the bottoming cycle. As a result, the power of the supercritical carbon dioxide power cycle at the present development stage is lower than that of the steam turbine cycle, but theoretically, the power can be larger than the steam turbine cycle. If the supercritical carbon dioxide power cycle improves the isentropic efficiency of the turbine by 89%, the isentropic efficiency of the compressor by 83%, and the effectiveness of the recuperator by 0.9, the power can be same to the steam turbine cycle.
Keywords
Molten Carbonate Fuel Cell; Supercritical Carbondioxide Power Cycle; Steam Turbine Cycle; Bottoming Cycle;
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