FIELD: mechanical engineering; devices working by Stirling cycle. SUBSTANCE: during operation of engines 1 and 2, forced oscillations arise in outlet pipes 8 and 9. Due to reciprocating motion of pistons 10 and 11 caused by forced oscillations in inlet pipes 8 and 9 and spring 12 located between pistons 10 and 11, pressure in working chamber 7 changes periodically, thus making bypass valves 13 and 14 operate pumping liquid from chamber 16 and 17 through working chamber 7 via pipe lines 18 and 19. EFFECT: effective use of fluctuations of liquid columns in outlet pipes of engines, type FLUIDYNE in handling liquids; control of pumping plant; enhanced efficiency of engines and pumping plant as a whole. 1 dwg
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