A13 7.5kw electric output Stirling engine prototype of 4-cylinder horizontally opposed piston, with enhanced heat recovery

Abstract

For enhancement of heat recovery at the heater part of Stirling engine, we made a prototype Stirling engine of 7.5kw output, with four kinds of heat recovery enhancement method. Large size heat exchanger with large bore and stroke opposed piston, circulating flow system with lead valves and manifold, multi-stage heater, and working medium including condensable fluid. Through a simple modeling of 2-stage, circulating flow Stirling Engine with 10% partial pressure of H20 vapor, the heat recovery ratio on the heater part increases approx. 2.4 times, compare with single stage normal Stirling Engine.