Jet booster two-stage super-cooling trans-critical CO2 dual-temperature system and application

Abstract

The invention provides an ejector booster two-stage super-cooling trans-critical CO2 dual-temperature system and application. The ejector booster two-stage super-cooling trans-critical CO2 dual-temperature system comprises an ejector, booster, and dual-supercooler series mechanical super-cooling cycline and a trans-critical CO2 dual-temperature-region cycle, which can mutually exchange heat; the trans-critical CO2 dual-temperature-region cycle comprises a CO2 low-temperature-stage evaporator, an outlet of the CO2 low-temperature-stage evaporator sequentially communicates with a CO2 low-pressure-stage compressor, a CO2 medium-pressure-stage compressor, a CO2 high-pressure-stage compressor, a heating medium side of a CO2 gas cooler, a heating medium side of the medium-temperature-stage cooling evaporator, a heating medium side of a low-temperature-stage cooling evaporator, a medium-temperature-stage gas-liquid separator, a low-temperature-stage gas-liquid separator and an inlet of a CO2low-temperature-stage evaporator. The ejector booster two-stage super-cooling trans-critical CO2 dual-temperature system can reduce gas exhaust pressure of the compressor, reduces a pressure ratio ofthe CO2 compressor, improves isentropic efficiency, and prolongs the service life of the compressor.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, heating and heat pump, and in particular relates to a two-stage supercooled transcritical CO 2 Dual temperature system and its application. Background technique [0002] Today, when energy is increasingly scarce and environmental problems are becoming more prominent, the whole society is looking for feasible ways to save energy and protect the environment. At the same time, new technologies and products with excellent performance, low price and stable operation are also emerging. In terms of energy consumption, refrigeration and air-conditioning buildings account for a large proportion and are the largest electricity consumers in buildings. New energy-saving refrigeration and heat pump technologies need to be explored. For residential and commercial applications, there is an increasing demand for multi-zone cooling and heating. At present, two and more refrigeration (heat pump) equipment...

AI Technical Summary

Problems solved by technology

[0004] The gas-liquid two-phase fluid after throttling in the conventional refrigeration system directly enters the evaporator or the gas-phase working medium is throttled through the gas-liquid separator and then enters the compressor for further compression. The gas-phase working medium does not participate in evaporation and heat absorption, and has no contribution to the refrigeration process. The traditional treatment method leads to the deterioration of the heat transfer effect of the heat exchanger or the increase of the power consumption of the compressor

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