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Environmentally-friendly mixed refrigerant used for replacing R134a and preparation method of refrigerant

A mixed refrigerant and environmental protection technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of high flammability and high GWP value, and achieve the effect of good environmental protection performance, excellent thermal parameters and thermal performance.

Active Publication Date: 2019-05-07
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The refrigerants disclosed in the above-mentioned patents have disadvantages such as high GWP value, inability to be directly filled into R134a systems, or high flammability. Therefore, it is necessary to develop refrigerants with better refrigeration performance, better compatibility with existing systems, and New refrigerants with better environmental performance

Method used

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  • Environmentally-friendly mixed refrigerant used for replacing R134a and preparation method of refrigerant
  • Environmentally-friendly mixed refrigerant used for replacing R134a and preparation method of refrigerant
  • Environmentally-friendly mixed refrigerant used for replacing R134a and preparation method of refrigerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of the mixed refrigerant is carried out in a 2L stainless steel stirring tank with cooling function. Set the temperature of the stirred tank at -10°C, and add 278.4g of 3,3,3-trifluoropropene, 54g of difluoromethane and 6222.2g of 1,1,1,2-tetrafluoroethane to the tank in sequence. After the sample is filled, Turn on the stirrer, cool down to -20°C, keep stirring for 2 hours, and control the pressure of the equilibrium tank within 0.2MPa, so that 3,3,3-trifluoropropene, difluoromethane and 1,1,1,2-tetrafluoroethane Mix in liquid state. After the treatment process, a mixed refrigerant is obtained, wherein the molar percentage of 3,3,3-trifluoropropene is 29%, the molar percentage of difluoromethane is 10%, 1,1,1,2-tetrafluoroethane The molar percentage of is 61%.

Embodiment 2～10

[0024] Examples 2-10 The preparation method of environmentally friendly mixed refrigerants is similar to that of Example 1, the difference is that 3,3,3-trifluoropropene, difluoromethane and 1,1,1,2-tetrafluoroethane are changed The mole percentage, the specific usage is as shown in Table 1.

[0025] Table 1

[0026]

[0027]

Embodiment 11

[0029] The preparation of the mixed refrigerant is carried out in a 2L stainless steel stirring tank with cooling function. First, 1.60 g of nanoparticle Fe 2 o 3 Add it to the balance tank, and set the temperature of the stirred tank to -10°C. Add 625.8g of 3,3,3-trifluoropropene, 54g of difluoromethane and 224.4g of 1,1,1,2-tetrafluoroethane to the kettle in sequence. After the sample is filled, turn on the stirrer and cool down to -20 ℃, keep stirring for 2 hours, and control the pressure of the equilibrium tank within 0.2 MPa, so that 3,3,3-trifluoropropene, difluoromethane and 1,1,1,2-tetrafluoroethane are mixed in a liquid state. After the treatment process, a mixed refrigerant is obtained, wherein the molar percentage of 3,3,3-trifluoropropene is 67.99%, the molar percentage of difluoromethane is 10%, 1,1,1,2-tetrafluoroethane The mole percentage is 22%, Fe 2 o 3 The molar percentage of nanoparticles is 0.01%.

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Abstract

The invention discloses an environmentally-friendly mixed refrigerant used for replacing R134a and a preparation method of the refrigerant. The environmentally-friendly mixed refrigerant used for replacing the R134a is composed of the following components, in percentages by molar: 29-92% of 3,3,3-trifluoropropene, 3-20% of difluoromethane and 5-61% of 1,1,1,2-tetrafluoroethane. According to the refrigerant and preparation method provided by the invention, the 3,3,3-trifluoropropene and the 1,1,2,2-tetrafluoroethane are added into the 1,1,1,2-tetrafluoroethane, so that the environmentally-friendly properties of the mixed refrigerant are improved, and the GWP value is significantly reduced compared with that of the R134a; in addition, the environmentally-friendly mixed refrigerant prepared by the method has excellent thermal parameters and thermal performance, the circulation efficiency, the refrigeration coefficient and the unit volume refrigeration capacity in the refrigeration systemare superior or equivalent to those of the R134a, the saturated vapor pressure is similar to that of the R134a, and the refrigerant can directly replace the R134a. The invention also discloses the environmentally-friendly mixed refrigerant. Fe2O3, MnO2, ZnO or Al2O3 nanoparticles are added into the above mixture, so that compatibility between the refrigerant and mineral-type refrigerating machineoil is improved.

Description

technical field [0001] The invention relates to a mixed refrigerant, in particular to an environment-friendly mixed refrigerant replacing R134a and a preparation method thereof. Background technique [0002] R134a is currently a kind of automobile air-conditioning refrigerant widely used in China and the world. Because it has no damage to the ozone layer, it has been used as a substitute for R12 refrigerant. However, R134a still has a strong greenhouse gas effect (GWP value is 1550). At present, China's auto industry is in a stage of rapid growth. It is estimated that in 2030, the number of cars in my country will increase by 190 million compared with 2015. At the same time, as the air-conditioning installation rate of light-duty passenger vehicles approaches 100%, the emissions of automotive air-conditioning refrigerants will continue to increase along with economic growth. [0003] In recent years, global warming has intensified. In order to cope with climate change, cou...

Claims

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Application Information

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IPC IPC(8): C09K5/04
Inventor 吕剑杨志强唐晓博曾纪珺张伟赵波郝志军亢建平李凤仙
Owner XIAN MODERN CHEM RES INST
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