FIELD: power engineering. SUBSTANCE: invention relates to power plants with Stirling engines designed for operation without communication with atmosphere, for instance, in deepwater apparatus and submarines. Proposed power plant has Stirling engine, sea water main line coupled with engine cooling circuit through cold accumulator, cryogenic fuel and cryogenic oxygen tanks, economizer, and cooling unit through which engine cooling circuit passes. Plant has bubbling chamber partially filled with sea water to which exhaust gas line is connected and it has also remaining oxygen line getting out of gas part of bubbling chamber and connected with oxidizer main line by means of ejector located on oxidizer main line between economizer and cooling unit. Bubbling chamber is connected to sea water main line and is coupled with outboard space by means of pressure line with pump. Sea water main line is furnished with discharge branch with control valve. Liquefied natural gas is used as cryogenic fuel. EFFECT: reduced mass and overall dimensions of plant and cost of operation of submarine as a whole. 1 dwg
