FIELD: supply of heat of hot-water plants in closed heat supply systems. SUBSTANCE: proposed system includes two-way valve and preheated water pipe line connected to thermal pump which consists of compressor using Freon as working medium, water and air heat exchanger and throttle valve; proposed system is additionally provided with water reservoir connected with compressor outlet through additional water heat exchanger and one-way valve whose inlet is connected to throttle valve and outlet is connected to air or additional air heat exchanger; one inlet of additional air heat exchanger used for condensation of Freon is connected with one-way valve and second inlet is connected with two-way valve. Water reservoir of heating system is connected in series with heating element. EFFECT: enhanced efficiency of utilization of thermal energy in central heating system. 2 cl, 1 dwg
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