Abstract
For enhancement of heat recovery at the heater part of Stirling engine, we made a prototype Stirling engine of 3.7kw maximum output, with large size heat exchanger, large bore and stroke opposed piston, and semi-circulating flow system by lead valves and manifold at the heater side. Then, the semi-circulating flow effect is measured by the prototype and wooden biomass combustion. Although the manifold and lead valves are small, simple, low dead volume and low cost, temperature efficiency of heater part enhanced 5/3 times compared with the ordinary reciprocating flow Stirling engine.
