Partial cascade type CO2 trans-critical two-stage compression refrigeration system for commercial supermarkets

A refrigeration system and two-stage compression technology, applied in refrigerators, compressors, air-conditioning systems, etc., can solve the problems of low energy utilization rate and low system efficiency, and save operating costs, space resources, and low energy usage fees. Effect

Pending Publication Date: 2019-07-26
TIANJIN UNIV OF COMMERCE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a CO 2 Transcritical two-stage compression refrigeration system solves the problems of low energy utilization rate and low system efficiency in the prior art

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  • Partial cascade type CO2 trans-critical two-stage compression refrigeration system for commercial supermarkets

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] CO 2 Schematic diagram of transcritical two-stage compression refrigeration system figure 1 As shown, the refrigeration system includes a partial cascade subcooling refrigeration system and CO 2 Transcritical two-stage compression refrigeration system.

[0023] The partial cascade subcooling refrigeration system is a single-stage vapor compression refrigeration system, and the refrigerant liquid enters the compressor 14, the condenser 15, the throttle valve 16 and the cooling evaporator 7 through pipelines to complete refrigeration;

[0024] The CO 2 The transcritical two-stage compression refrigeration system includes a low temperature evaporator 13, a medium temperature evaporator 11, a low temperature compressor 1, a high temperature compressor 2, a parallel compressor 3, a hot water heater 4, an air heat exchanger 5, a g...

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Abstract

The invention discloses a partial cascade type CO2 trans-critical two-stage compression refrigeration system for commercial supermarkets. Refrigerant liquid for a partial cascade supercooling refrigeration system enters compressors, a condenser, throttle valves and a cooling evaporator to complete refrigeration successively through pipelines, which is used for supercooling the CO2 trans-critical two-stage compression refrigeration system to increase the refrigerating capacity and improve the system performance. The CO2 trans-critical two-stage compression refrigeration system comprises a low temperature evaporator, a medium temperature evaporator, a low temperature compressor, a high temperature compressor, a parallel compressor, a hot-water heater, an air heat exchanger, a gas cooler, thecooling evaporator, a high pressure throttle valve, an air conditioner, an intercooler, a bypass-valve, a medium pressure throttle valve and a low pressure throttle valve. The coupling of the two systems can realize the combination of various refrigeration and heating requirements of the commercial supermarkets, and the problem of low performance coefficient of a CO2 refrigerant used in the commercial supermarket refrigeration system is solved. Meanwhile, the safety of the system is ensured, and the efficiency of energy utilization is effectively improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a partially cascaded supercooled CO 2 Two-stage compression refrigeration system. Background technique [0002] In recent years, in response to environmental security issues, with the joint efforts of the international community, developed countries and some developing countries have made corresponding commitments to control the destruction of the ozone layer and the greenhouse effect, among which high "ODP" and high "GWP" refrigerants Production and application are strictly limited. At present, the HCFC refrigerants used in large quantities will be reduced to maintenance volume before 2030, and some HFC refrigerants may become intermediate transition products. The researchers concluded that there are two technical routes to solve the technical solution of refrigerant application. The first technical route is to continue to develop artificial refrigerants with zero "ODP" ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B29/00F24H4/02F24F5/00
CPCF25B1/10F25B29/003F24H4/02F24F5/0096
Inventor 孙志利李佳美王彩云杨立杰刘永强徐一博
Owner TIANJIN UNIV OF COMMERCE
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