50 W Class Stirling Engine, Mini-Ecoboy

In order to develop a compact and low cost Stirling engine, we have developed a displacer type Stirling engine named Mini-Ecoboy. It has simple heat exchangers and a Rhombic mechanism. Its target shaft power is 50 W at engine speed of 4000 rpm and mean pressure of 0.8 MPa using helium as working gas.

LINK to: 50 W Class Stirling Engine, Mini-Ecoboy
This site shows the outline of the engine structure and the performance test.

Relative Papers (in English)
Development of a Small 50W Class Stirling Engine: HIRATA, K., Sixth International Symposium On Marine Engineering, p.235-240, Oct. 2000.