Multi-cylinder free piston Stirling engines and heat pumps in alpha arrangement with graduated pistons

摘要

An improved free-piston Stirling engine (111) comprising at least three pistons (56, 81, 122, 124) reciprocably disposed in a mating cylinder (50, 94, 123, 125), each piston (56 , 81, 122, 124) and cylinders (50, 94, 123, 125) define an expansion space (64, 83) and a compression space (68, 87), the expansion space (64, 83) in each cylinder (50, 94 , 123, 125) serially in an alpha-stirling arrangement via a regenerator (70, 89) and via a plurality of heat exchangers (72, 74, 91, 92) with a compression space (68, 87) in another cylinder (50, 94 , 123, 125) and the compression space (68, 87) in each cylinder (50, 94, 123, 125) serially in an alpha-stirling arrangement via a regenerator (70, 89) and via a plurality of heat exchangers (72, 74, 91, 92) is connected to the expansion space (64, 83) in another cylinder (50, 94, 123, 125), the free-piston Stirling engine (111) comprising: a) each Cylinder (50, ...