Mechanical auxiliary overcooling CO2 cross-critical heat pump heating system

Abstract

The invention discloses a mechanical auxiliary overcooling CO2 cross-critical heat pump heating system. The system comprises a mechanical auxiliary overcooling heat pump system and a CO2 heat pump system; backwater of a heating radiator flows into a condenser to be heated through a three-way valve and then flows into a mixing tank; a refrigerant flowing out of a cooling evaporator flows into the condenser to be cooled through an auxiliary circulation compressor, and then flows into the cooling evaporator through an auxiliary circulation throttling valve; CO2 heat flows out of an evaporator, passes through a compressor then enters a gas cooler, then enters a pipeline which is provided with the evaporator and a throttling valve to enter the evaporator; and the backwater of the heating radiator flows into the gas cooler to be heated through the three-way valve and then flows into the mixing tank, and the mixing tank is connected with an water inlet of the heating radiator through a pipeline. According to the system, CO2 at an outlet of the gas cooler of a CO2 system is overcooled through a mechanical overcooling system, so that the temperature of CO2 before the COW2 entering the throttling valve is reduced, throttling loss is reduced, and therefore the operation high-pressure of the CO2 is reduced, and efficient operation of the CO2 heat pump system is ensured.

Description

technical field [0001] The present invention relates to the technical field of heating, more specifically, relates to mechanically assisted supercooled CO 2 heat pump system. Background technique [0002] As a basic industry with overall and leading influence on the development of the national economy, the heating industry is closely related to people's lives. In recent years, my country's central heating industry has developed rapidly. Central heating has moved from large cities to small and medium-sized towns, from government agencies and public buildings to residential heating. [0003] Most towns and rural areas in northern my country rely on coal for heating, and it is still low-quality coal, which produces more pollutants and is more harmful to the environment. In order to control the smog problem in northern winter, the government proposes to use coal to electricity and other measures to solve the heating in northern winter, that is, to replace traditional coal-fire...

AI Technical Summary

Problems solved by technology

However CO 2 Heat pumps are suitable for systems with large temperature differences between supply and return water ...

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