Subway waste heat source heat pump system with auxiliary cold source and working method of system

Abstract

The invention discloses a subway waste heat source heat pump system with an auxiliary cold source and a working method of the system. The system comprises a capillary network front-end heat exchanger,a compressor, a condenser, an evaporator, a radiation tail end and the auxiliary cold source, the capillary network front-end heat exchanger conveys high-temperature liquid to the evaporator througha circulation loop between a winter subway waste heat source side heat exchanger and a heat pump unit, low-temperature return water at the radiation tail end is conveyed to the condenser through a circulation loop between the winter load side radiation tail end and the heat pump unit, and high-temperature water flows into the radiation tail end from the condenser and supplies heat for an above-ground building. After cooling water in the condenser exchanges heat with high-temperature high-pressure refrigerant gas, the cooling water is conveyed into the auxiliary cold source for cooling througha circulation loop between a summer auxiliary cold source side and the heat pump unit, the cooling water in the condenser is conveyed to the evaporator through a throttling valve, and chilled water inthe evaporator is cooled and conveyed to the radiation tail end through a circulation loop between the summer load side radiation tail end and the heat pump unit to cool the above-ground building.

Description

technical field [0001] The invention relates to a subway waste heat source heat pump system, in particular to a subway waste heat source heat pump system with an auxiliary cold source and a working method thereof. Background technique [0002] At present, the subway has become the only choice for more and more large cities to relieve traffic pressure. The total mileage of my country's subway planning has reached about 6,000 kilometers. After the subway is put into operation, heat accumulation in the tunnel is unavoidable. Since the tunnel will generate more and more waste heat as the running time increases, the temperature rise in the tunnel will be obvious. To solve this problem, Guangzhou, Shanghai and other construction Most cities with earlier subways used the method of setting cooling towers on the ground to directly cool the subway tunnels. However, most of the areas that the subway passes are in the bustling areas of the city center. And it happened that the subway a...

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Problems solved by technology

[0004] Since the cooling load in the station only accounts for a small part during the operation of the subway, which is far smaller than the cooling load of the above-ground buildings, and only cooling the subway station does not make full use of the ability of the subway tunnel to absorb waste heat, the above-mentioned patent does not solve the problem of above-ground buildings. Cooling problem for users in summer

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