FIELD: heat power engineering. SUBSTANCE: heat accumulator has housing 1 with chamber 2 for liquid heat-transfer agent, vapor chamber 5 bounded with cover 6 and condensate chamber 7. Intake compartment 3 is located in the upper portion of the housing above cover and is brought in communication with vapor chamber 3 by means of bypass branch pipe 12 combined with hydraulic seal whose lower portion is located in chamber 2. In the course of operation, intake compartment 3 is used as expansion tank. EFFECT: enhanced efficiency. 3 cl, 1 dwg
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