Abstract
A waste heat recovery Stirling engine has lower working temperature level and lower thermal efficiency than a high-performance Stirling engine with combustion gas as the heat source. Therefore, the cooler should have enough rejected heat performance. When the cooler does not have enough performance, the compression space gas temperature becomes high, and the power becomes low. In this paper, the authors present operating results using several types of the cooler with a 500 W class Stirling engine. Then the thermal performance of the coolers is discussed with the comparison of the test results and calculated results.
