Report on the developments of Steam Super Stirling Engine

The "Steam Super Stirling Engine (SSSE)" is a hybrid engine of Rankine cycle steam engine and steam Stirling engine. This engine has a power piston and a displaced piston. When the power piston comes near its top dead center, saturated steam of 0.2-1.0 Mpa is injected into the cold side of the displaced cylinder, and the steam expands into power cylinder at constant high temperature after passing through a regenerator and heater, as a Stirling engine. Many small remodeled atmospheric engines were tasted. Then a small double expanding SSSE was installed on an electric vehicle for the generation of electricity. Each engine above was successful, and the following points known: (1) power increases to several times those of atmospheric Stirling engines; (2) this engine needs no Helium gas; (3) nearly no cooling system and pressurized crankcase are needed; and (4) theoretical thermal efficiency is expected to be in the middle of both cycles.