HEAT PUMP SYSTEM FOR UTILIZING WASTE HEAT OF SUBWAY EXHAUST AIR Russian patent published in 2021 - IPC F24F12/00 F24D15/04 

FIELD: subway.

SUBSTANCE: invention relates to the subway, namely to installations for using waste heat of the exhaust air of the subway for the simultaneous production of hot and cold water and their use in heating systems, hot water supply and air conditioning for the subway's own needs. The heat pump 1 is located in the heating point 19 inside the metro station 24 with a double-track tunnel 25, under the roof of which the exhaust ventilation duct is located 20. Due to the operation of the heat pump 1, the low-potential heat of the exhaust air is converted into heat with a high temperature, which is transferred to the heat carrier circulating in pipelines 14 hot water circuit. The hot water circuit is divided through the heat accumulator 4 into the heating circuit 9 and the hot water circuit 10. When transferring heat in the evaporator of the heat pump 1, the heat carrier (propylene glycol) of the intermediate heat transfer circuit from the exhaust air is cooled and its refrigerating potential can be used for cooling systems of consumers located at the metro station 24. Objects located inside the metro station are used as heat and cold consumers.

EFFECT: increasing the efficiency of the heat pump, reducing the volume of construction work when installing a heat pump at a metro station and reducing the length of heat communications (pipelines) from the heat pump to consumers of thermal energy and cold.

1 cl, 3 dwg