Abstract
Stirling engine can be operated by many kinds of heat sources other than fossil fuel. Low temperature hear sources of solar radiation, biogas, geothermal and exhaust heat energies can be utilized. The authors designed and developed a low temperature difference Stirling engine which operates at the temperature difference between the room temperature and ambient temperature with thermal ratio of 0.93. As a result, it is confirmed that the maximum brake power of 1mW/12rpm was obtained on the experimental engine under the condition of higher heat source temperature of about 22℃, heat sink temperature 4℃, buffer pressure of atmospheric pressure. In addition, it was possible to obtain 0.915 mechanism efficiency.
