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Mixed refrigerant for replacing HCFC-22 as well as preparation method and application of mixed refrigerant

A technology of mixing refrigerant and condensing temperature, applied in chemical instruments and methods, materials for heat exchange, etc., to achieve the effects of large economic benefits, reduced energy consumption, and reduced charging capacity

Inactive Publication Date: 2015-01-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are no related reports on mixed refrigerants with overall performance better than HCFC-22. Therefore, the development of new mixed refrigerants with excellent performance that can replace HCFC-22 is still the research focus of the refrigerant industry.

Method used

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  • Mixed refrigerant for replacing HCFC-22 as well as preparation method and application of mixed refrigerant
  • Mixed refrigerant for replacing HCFC-22 as well as preparation method and application of mixed refrigerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A mixed refrigerant that replaces HCFC-22 under high-temperature conditions, composed of the following three components in terms of mass percentage: fluoroethane, 80%; difluoromethane, 8%; 1,1-difluoroethane , 12%.

[0054] When replacing HCFC-22 under high-temperature conditions, physically mix HFC-161, HFC-32, and HFC-152a in a liquid phase at a mass percentage of 80:8:12 to obtain the above-mentioned mixed refrigerant.

Embodiment 2

[0056] A mixed refrigerant that replaces HCFC-22 under high-temperature conditions, composed of the following three components by mass percentage: fluoroethane, 70%; difluoromethane, 10%; 1,1-difluoroethane , 20%.

[0057] When replacing HCFC-22 under high-temperature conditions, physically mix HFC-161, HFC-32, and HFC-152a in a liquid phase at a mass percentage of 70:10:20 to obtain the above-mentioned mixed refrigerant.

Embodiment 3

[0059] A mixed refrigerant that replaces HCFC-22 under high-temperature conditions. It consists of the following three components by mass percentage: fluoroethane, 75%; difluoromethane, 10%; 1,1-difluoroethane , 15%.

[0060] When replacing HCFC-22 under high-temperature conditions, physically mix HFC-161, HFC-32, and HFC-152a in a liquid phase at a mass percentage of 75:10:15 to obtain the above-mentioned mixed refrigerant.

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Abstract

The invention relates to a mixed refrigerant for replacing HCFC-22 as well as a preparation method and an application of the mixed refrigerant. In high-temperature working conditions, the mixed refrigerant comprises the following components by mass percentage: 52-80% of fluoroethane, 5-12% of difluoromethane and 8-39% of 1, 1-difluoroethane and in medium-temperature working conditions, the mixed refrigerant comprises 55-80% of fluoroethane, 5-12% of difluoromethane and 8-36% of 1, 1-difluoroethane. When preparation is performed, the three components are uniformly mixed according to a proportion in a liquid state. According to the mixed refrigerant, the ODP (ozone depletion potential) is 0, the GWP (global warming potential) is less than 150, the evaporation pressure, condensation pressure, pressure ratio and standard boiling point are similar to those of HCFC-22, the slip temperature is less than 3K, the coefficient of cycling performance, refrigeration amount per unit mass, refrigeration amount per unit volume and refrigeration amount per standard volume are better than those of HCFC-22, and the power consumption per unit mass and exhaust temperature are lower than those of HCFC-22, so that the mixed refrigerant can be used as a long-term alternative to HCFC-22 and can reduce the filling amount and energy consumption.

Description

technical field [0001] The invention belongs to the field of refrigerants, and relates to a mixed refrigerant replacing HCFC-22, a preparation method and application thereof. Background technique [0002] HCFC-22 is the most widely used refrigerant with excellent performance in the refrigeration industry today, and is also widely used in various occasions such as air conditioning, chemical industry, and ships. HCFC-22 has excellent chemical and physical properties, non-toxic, non-flammable, non-explosive, and has good safety in use; excellent thermodynamic properties and good miscibility with mineral oil, no corrosion to metal and non-metal materials, but its adiabatic compression The index is 1.194, the final compression temperature is high, and cooling measures should be taken when the compressor works under high pressure. ODP of HCFC-22=0.034, GWP=1700, discharge into the atmosphere will destroy the ozone layer and cause the greenhouse effect. "The Montreal Protocol on ...

Claims

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Application Information

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IPC IPC(8): C09K5/04
CPCC09K5/045C09K2205/122C09K2205/22C09K2205/32
Inventor 赵小明吕二立
Owner XI AN JIAOTONG UNIV