Testing of a Low-Temperature Differential Stirling Engine by Using Actual Solar Energy

Abstract

In this article, the construction and performance of a small low-temperature differential Stirling engine is presented. The engine is connected to a small DC generator and tested with actual solar energy by using a parabolic-dish concentrator as a heat source. Engine performance tested with actual solar energy is reported. Variations of engine-generator power output, combined engine and generator efficiency, and overall efficiency with direct normal intensity are presented.

Keywords:

• Stirling engine
• Low-temperature differential Stirling engine
• Hot-air engine
• Solar-powered heat engine
• Parabolic-dish concentrator

ACKNOWLEDGMENTS

The authors would like to express their appreciation to the Joint Graduate School of Energy and Environment (JGSEE) and the Thailand Research Fund (TRF) for providing financial support for this study.