CO2 refrigerating and heating integrated system capable of performing mechanical assisted super-cooling through non-azeotropic working medium

Abstract

The invention discloses a CO2 refrigerating and heating integrated system capable of performing mechanical assisted super-cooling through a non-azeotropic working medium. Non-azeotropic mixed steam compression cycle is combined with CO2 trans-critical cycle; the non-azeotropic working medium has temperature glide in a phase-change process; one path of return water flows through a condenser which is assisted by the non-azeotropic working medium to circulate, the other path of return water flows through a CO2-cycle gas cooler to heat, temperature difference of inlets and outlets of two paths ofwater is relatively small, and relatively good temperature matching is formed between an assisted-cycle non-azeotropic mixed working medium condensing process and a CO2 fluid cooling process. Very good temperature matching is formed between a non-azeotropic refrigerant evaporating process and a trans-critical CO2 fluid cooling process, heat-exchange irreversible loss in the condenser, a gas coolerand a cooling evaporator can be greatly reduced through a combined heating system, compressor input power can be reduced by recycling expansion work through an expanding machine, and efficient operation of CO2 refrigerating and heating integrated system is guaranteed.

Description

technical field [0001] The present invention relates to the mechanically assisted supercooled CO of non-azeotropic working medium 2 Integrated cooling and heating system. Background technique [0002] As Beijing and Zhangjiakou successfully bid to host the 2022 Winter Olympics, my country's ice and snow sports have ushered in unprecedented opportunities for development. In order to achieve the goal of "300 million people participating in ice and snow sports", ice and snow games are gradually popularized to the public. As more and more people participate in ice and snow sports, ice and snow sports venues and facilities will also increase rapidly. Large gymnasiums will have artificial skating rinks, swimming pools, and heating and cooling needs in winter and summer. To ensure the normal operation of large sports venues, it is necessary to provide cooling for the skating rink through refrigeration equipment, and provide heat for swimming pools and heating equipment. In orde...

AI Technical Summary

Problems solved by technology

However, CO 2 The heat pump system is suitable for systems with a large temperature difference between supply and return water (such as for heat pump water heater systems), such as using CO 2 Heat pumps are used for heating and are less energy efficient

and CO 2 The throttling loss is relatively large, resulting in low energy efficiency under refrigeration conditions

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