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Dual-stage compression refrigeration circulating system for cooling flashing gas bypass in stepped mode

A two-stage compression and circulation system technology, applied in irreversible cycle compressors, refrigerators, compressors, etc., can solve the problems of large throttling loss and low cycle efficiency in the refrigeration cycle, reduce pressure loss, and strengthen heat exchange. The effect of process, small fire use" loss

Inactive Publication Date: 2016-06-08
TIANJIN UNIV OF COMMERCE
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that CO 2 To solve the problems of large throttling loss and low cycle efficiency in the refrigeration cycle, a two-stage compression refrigeration cycle system with flash gas bypass cascade cooling is provided

Method used

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  • Dual-stage compression refrigeration circulating system for cooling flashing gas bypass in stepped mode

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Embodiment Construction

[0014] The system will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, the outlet side of the low-pressure stage compressor 1 is connected to the inlet end of the intercooler 2, the outlet end of the intercooler 2 is connected to the inlet end of the high-pressure stage compressor 3, and the high-pressure stage compressor 3. The outlet port is connected to the inlet port of the gas cooler 4. The outlet port of the gas cooler 4 is connected to the high-temperature fluid inlet port of the flash gas bypass external heat exchanger 5. The flash gas bypass external heat exchange The high-temperature fluid outlet end of the device 5 is connected to the high-temperature fluid inlet end of the internal heat exchanger 6, and the high-temperature fluid outlet end of the internal heat exchanger 6 is connected to the inlet end of the flash gas bypass internal heat exchanger 7, so The outlet end of the...

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Abstract

The invention discloses a dual-stage compression refrigeration circulating system for cooling a flashing gas bypass in a stepped mode. High-temperature gas refrigerant discharged by a high-pressure compressor enters a gas cooler to be primarily cooled, then gas refrigerant sequentially passes a flashing gas bypass external heat exchanger, an internal heat exchanger and a flashing gas bypass internal heat exchanger to be sufficiently cooled, and finally refrigerant gas passing through the flashing gas bypass external heat exchanger and refrigerant gas passing through the internal heat exchanger are input to a low-pressure compressor after being mixed. The key problems that CO2 refrigeration circulating throttling loss is large and circulating efficiency is low are solved, the efficiency of the CO2 trans-critical refrigeration circulating system is greatly improved, and the use range of the system is widened.

Description

technical field [0001] The present invention relates to CO 2 The two-stage compression refrigeration cycle system used as a refrigerant, specifically, is a two-stage compression refrigeration cycle system with flash gas bypass cascade cooling. Background technique [0002] Climate change is a major problem facing human society today. Synthetic refrigerants such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) destroy the ozone layer and have a high greenhouse effect. There is a long way to go to replace refrigerants. From a long-term perspective, the use of natural working fluids in refrigeration and air-conditioning systems can fundamentally solve the problem of refrigerant substitution and achieve the environmental protection goals of refrigeration and air-conditioning systems. In such a situation, CO 2 Refrigeration system has become a research hotspot in the refrigeration and air-conditioning industry today. [0003] At present, many countries have b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B41/00F25B43/00
CPCF25B1/10F25B43/00F25B41/40
Inventor 孙志利吴国强臧润清
Owner TIANJIN UNIV OF COMMERCE
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