A microchannel near-isothermal compression transcritical carbon dioxide circulation system and method

A technology of isothermal compression and carbon dioxide, applied in compressors, compressors, fluid circulation arrangements, etc., can solve problems such as poor coefficient of performance, achieve the effect of reducing power consumption and improving theoretical performance
CN113028668BActive Publication Date: 2021-12-28XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2021-12-28

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Abstract

The invention provides a micro-channel near-isothermal compression type transcritical carbon dioxide circulation system and method. The system includes: the low-pressure outlet of the regenerator is connected to the central inlet of the centrifugal impeller through an isothermal compression suction pipe, and the circumferential outlet of the centrifugal impeller is connected to several The inlet of a scaling microchannel heat exchanger is connected, the outlet of the scaling microchannel heat exchanger is connected to the inlet of the gas collector, the outlet of the gas collector is connected to the inlet of the auxiliary gas cooler through an isothermal compression exhaust pipe, and the outlet of the auxiliary gas cooler is connected to the heat recovery The high-pressure outlet of the regenerator is connected to the inlet of the evaporator through the electronic expansion valve, and the outlet of the evaporator is connected to the inlet of the gas-liquid separator; the gas outlet of the gas-liquid separator is connected to the low-pressure inlet of the regenerator. The present invention replaces the realization method of the conventional nearly isentropic compression process with the near isothermal compression process, thereby without affecting the transcritical CO 2 The power consumption of the compressor is significantly reduced on the premise of maintaining the cooling capacity of the system, thereby greatly improving the energy efficiency ratio of the cycle.
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Description

technical field

[0001] The invention belongs to the technical field of refrigeration and heat pumps, and relates to a microchannel near-isothermal compression transcritical carbon dioxide circulation system and method. Background technique

[0002] After the protection of the global ozone layer has achieved initial results, the control and reduction of strong greenhouse gases have become the main content of the technological transformation of the refrigeration industry. In this context, as a pure natural working medium, CO 2 back into the public eye. Compared with other alternatives such as CFC and HCFC refrigerants that are extremely destructive to the ozone layer, and HFC refrigerants with a high greenhouse effect index, CO 2 The working fluid is the only refrigerant alternative that is non-toxic, non-flammable, ODP (Ozone Destruction Index) is 0, GWP (Greenhouse Effect Index) is extremely low, and low temperature fluidity / heat transfer is excellent. At the same time, wh...

Claims

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