CN-121991640-A - Low GWP replacement refrigerant for R410A, preparation method and application thereof

Abstract

The invention belongs to the technical field of refrigerants, and particularly relates to a low GWP (global warming potential) substitution refrigerant for R410A, a preparation method and application thereof. The substitute refrigerant is near azeotropic mixture and comprises the following components, by weight, 25-35 parts of difluoromethane (R32), 35-55 parts of ‌,1, 2-pentafluoroethane (R125) ‌ and 20-30 parts of 1, 2-trifluoroethylene (R1123). The refrigerant has the characteristics of good environmental protection, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic performance, and is particularly suitable for direct replacement of an air conditioning system without modifying the prior equipment.

Inventors

• LIU YE
• LIU JINGJING
• ZHANG LI

Assignees

• 湖北瑞能华辉能源管理有限公司
• 西安交通大学

Dates

Publication Date

20260508

Application Date

20260123

Claims (10)

1. 1. The low GWP replacement refrigerant for R410A is characterized by comprising, by weight, 25-35 parts of difluoromethane, 35-55 parts of ‌,1, 2-pentafluoroethane ‌ and 20-30 parts of 1, 2-trifluoroethylene.
2. 2. The low GWP replacement refrigerant for R410A according to claim 1, comprising the components of 25 to 30 parts by weight of difluoromethane, 35 to 45 parts by weight of ‌,1, 2-pentafluoroethane ‌,20 to 25 parts by weight of 1, 2-trifluoroethylene.
3. 3. The low GWP replacement refrigerant for R410A according to claim 1, comprising the components of 25 to 30 parts by weight of difluoromethane, 46 to 55 parts by weight of ‌,1, 2-pentafluoroethane ‌,26 to 30 parts by weight of 1, 2-trifluoroethylene.
4. 4. The low GWP replacement refrigerant for R410A according to claim 1, comprising 31 to 35 parts by weight of difluoromethane, 40 to 45 parts by weight of ‌,1, 2-pentafluoroethane ‌,20 to 25 parts by weight of 1, 2-trifluoroethylene.
5. 5. The low GWP replacement refrigerant for R410A according to claim 1, comprising 31 to 35 parts by weight of difluoromethane, 46 to 55 parts by weight of ‌,1, 2-pentafluoroethane ‌,26 to 30 parts by weight of 1, 2-trifluoroethylene.
6. 6. The low GWP replacement refrigerant for R410A according to claim 1, comprising 26 parts by weight of difluoromethane, 51 parts by weight of 1, 2-pentafluoroethane, 23 parts by weight of 1, 2-trifluoroethylene.
7. 7. The low GWP replacement refrigerant for R410A according to claim 1, comprising the following components, by weight, 30 parts of difluoromethane, 45 parts of 1, 2-pentafluoroethane, 25 parts of 1, 2-trifluoroethylene.
8. 8. The low GWP replacement refrigerant for R410A according to claim 1, comprising 34 parts by weight of difluoromethane, 49 parts by weight of 1, 2-pentafluoroethane, 27 parts by weight of 1, 2-trifluoroethylene.
9. 9. A method for preparing a low GWP substitution refrigerant for R410A according to any one of claims 1 to 8, comprising the steps of injecting difluoromethane, 1, 2-pentafluoroethane and 1, 2-trifluoroethylene in a gas phase or a liquid phase into a pressure-resistant container at normal temperature according to the weight ratio, uniformly mixing in a liquid phase state by a physical mixing method, and standing to obtain the near-azeotropic low GWP substitution refrigerant for R410A.
10. 10. The use of a low GWP replacement refrigerant for R410A according to any one of claims 1 to 8 for replacing R410A refrigerant in an air conditioning system comprising an air cooled system, a water cooled system or a heat pump system.

Description

Low GWP replacement refrigerant for R410A, preparation method and application thereof Technical Field The invention belongs to the technical field of refrigerants, and particularly relates to a low GWP (global warming potential) substitution refrigerant for R410A, a preparation method and application thereof. Background The R410A refrigerant is an HFC mixed refrigerant widely used for air-conditioning and heat pump systems, and has a main component of 50% R32 (difluoromethane) and 50% R125 (pentafluoroethane). Although R410A has excellent refrigerating performance, the GWP value of the refrigerant is high (about 2088), and the refrigerant is subject to elimination pressure of environmental protection regulations such as 'Kiril amendment'. In addition, R32 alone has low GWP (about 675), but has light flammability (A2L safety class) and high exhaust temperature, R125 alone has extremely high GWP (about 3500), poor refrigeration efficiency, and R1216 (hexafluoropropylene) alone has extremely low GWP (< 1), but has large difference in thermophysical properties from R410A, and poor system compatibility. Existing substitutes such as R32, R452B and R454B have the problems of limited flammability, limited GWP reduction, large temperature slippage and the like, although the existing substitutes are improved in terms of GWP or safety. Accordingly, the development of an alternative refrigerant that is low GWP, high performance, safe, and compatible with the R410A system is an urgent need in the air conditioning industry. The invention aims to provide a novel near-azeotropic mixed refrigerant, the GWP value of which is obviously lower than R410A, and meanwhile, similar thermodynamic performance and operation characteristics are maintained, and the refrigerant is specially optimized for an air conditioning system. Disclosure of Invention In order to solve the defects of the prior art, the invention provides a low GWP (global warming potential) substitution refrigerant for R410A, and a preparation method and application thereof. The refrigerant has the characteristics of good environmental protection, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic performance, and is particularly suitable for direct replacement of an air conditioning system without modifying the prior equipment. The technical scheme provided by the invention is as follows: An R410A low GWP substitute refrigerant for an air conditioning system comprises, by weight, 25 to 35 parts of difluoromethane (R32, CH 2F2), 35 to 55 parts of ‌,1, 2-pentafluoroethane ‌ ‌ (R125, CHF 2CF3), 20 to 30 parts of 1, 2-trifluoroethylene (R1123, C 2HF3). Based on the technical scheme: Compared with the prior HFC-410A refrigerant, the refrigerant provided by the invention has the advantages that the global warming potential is greatly reduced by about 20%, and the refrigerating capacity per unit volume is equivalent or slightly excellent in COP; Compared with single use of difluoromethane, the refrigerant provided by the invention has the advantages of higher safety (the combustibility is inhibited by R125) and reduced theoretical exhaust temperature, and has the advantages of obviously reduced GWP value and improved refrigeration efficiency; compared with 1, 2-trifluoroethylene which is singly used, the refrigerant provided by the invention has the advantages of higher safety (the combustibility is inhibited by R125) and reduced theoretical exhaust temperature; compared with ‌,1, 2-pentafluoroethane which is singly used, the refrigerant provided by the invention has the advantages of obviously reducing GWP value and greatly improving refrigeration efficiency. In general, the refrigerant has a low Global Warming Potential (GWP), high energy efficiency, and good system compatibility, and is suitable for direct replacement of R410A. Preferably, the composition comprises, by weight, 25-30 parts of difluoromethane, 35-45 parts of ‌,1, 2-pentafluoroethane ‌ and 20-25 parts of 1, 2-trifluoroethylene. Preferably, the composition comprises 25-30 parts by weight of difluoromethane, 46-55 parts by weight of ‌,1, 2-pentafluoroethane ‌ and 26-30 parts by weight of 1, 2-trifluoroethylene. Preferably, the composition comprises 31-35 parts by weight of difluoromethane, 40-45 parts by weight of ‌,1, 2-pentafluoroethane ‌ and 20-25 parts by weight of 1, 2-trifluoroethylene. Preferably, the composition comprises 31-35 parts by weight of difluoromethane, 46-55 parts by weight of ‌,1, 2-pentafluoroethane ‌ and 26-30 parts by weight of 1, 2-trifluoroethylene. More preferably, the composition comprises 26 parts by weight of difluoromethane, 51 parts by weight of 1, 2-pentafluoroethane and 23 parts by weight of 1, 2-trifluoroethylene. More preferably, the composition comprises 30 parts by weight of difluoromethane, 45 parts by weight of 1, 2-pentafluoroethane and 25 parts by weight of 1, 2-trifluoroethylene. More preferably, the composition compri