Pages 161-162
Cycle simulation was made on a SOFC-Stirling engine combined system in which the SOFC served as a topper and the Stirling engine worked as the bottoming cycle to evaluate partial load characteristics. The calculation showed that the system efficiency under low load is expected to be still on a high level although the heat loss causes a significant decrease in the efficiency. Also, the comparison with SOFC system revealed that the combined system is advantageous in case the operation of SOFC is difficult at high cell temperature and high hydrogen utilization factor.
