Abstract
We have now designed a new α^+-type engine that is considered about higher buffer pressure and higher engine speed. Note that the α^+-type mechanism is suitable for low-temperature-difference Stirling engines and the α^+-type engine has a mechanism that is possible to use a regenerator with a suff iciently large area without large load applied to the crankshaft. The α^+-type engine is most effectively applied to power generation using combined solar heat and combustion heat from a wood biomass because the engine can be driven by indirect heating using 300 degC thermal oils. We report the plan and design of new 10 kW class engine that reduces size of half, increases thermal efficiency from 12% to 20%.
