FIELD: power engineering. SUBSTANCE: combined central heating engine has boiling unit, solid fuel gas turbine engine, steam power plant and heat pump. Atmospheric air compressed in compressor of solid fuel gas turbine engine is heated from outside in heat-exchanging chamber disposed in fire box of boiling unit. Heat pump operates, when ratio of total heat obtained by hot heat-exchanger and cold heat-exchanger and heat equivalent to heat pump work has maximum value. EFFECT: increased efficiency, wider operational capabilities and enhanced reliability in operation. 3 cl, 1 dwg
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