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A mixed refrigerant formula with a minimum temperature of -150°C

A mixed refrigerant and the lowest temperature technology, which is applied in the field of cryogenic refrigeration to achieve excellent refrigeration performance, suppress flammability, and reduce the effect of global warming coefficient value GWP

Active Publication Date: 2021-06-11
杨文海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a mixed refrigerant formula with a minimum temperature of -150°C, which solves the problem that the existing mixed refrigerant formula with a minimum temperature of -150°C in the cryogenic zone cannot be used in While achieving excellent refrigeration performance in the cryogenic temperature zone, it is a technical problem to further make the mixed refrigerant meet the environmental protection requirements to the greatest extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The mixed refrigerant formula includes the following raw materials in parts by weight:

[0049] The first level is: 70% by mass of R134a (tetrafluoroethane CH2FCF3, boiling point -26.50°C, ozone-depleting potential value ODP is 0, non-toxic and non-flammable), 30% by mass of R142b (one chlorodifluoroethane CClF2CH3 , boiling point -9.6°C), mass fraction 20%;

[0050] The second level is: 60% by mass of R22 (difluorochloromethane CHClF2, boiling point -40.80 ° C, ozone destruction potential value ODP is 0.05), 20% by mass of R404A {44% R125 (pentafluoroethane C2HF5, boiling point -48.45°C, ODP is 0), 4% R134a (tetrafluoroethane CH2FCF3, boiling point -26.5°C, ODP is 0), 52% R143 (trifluoroethane C2H3F3, boiling point -4.7 ℃)}, 20% mass fraction of R290 (propane C3H8, boiling point-42.09 °C, ozone destruction potential value ODP is 0, global warming coefficient value GWP is 3.3), mass fraction 10%;

[0051] The third grade is: R23 (trifluoromethane CHF3, boiling point -...

Embodiment 2

[0056] The mixed refrigerant formula includes the following raw materials in parts by weight:

[0057] The first level is: 50% by mass of R134a (tetrafluoroethane CH2FCF3, boiling point -26.50°C, ozone-depleting potential value ODP is 0, non-toxic and non-flammable), 50% by mass of R141b (dichlorofluoroethane CH3CCl2F , boiling point 32.05°C, ozone-depleting potential value ODP 0.15, global warming coefficient value GWP 0.15), mass fraction 40%;

[0058] The second grade is: 40% by mass of R22 (chlorodifluoromethane CHClF2, boiling point-40.80°C, ozone-depleting potential value ODP is 0.05), 20% by mass of R407c{23%R32 (difluoromethane CH2F2, boiling point- 51.60°C), 25% R125 (pentafluoroethane C2HF5, boiling point -48.45°C, ozone-destroying potential ODP is 0), 52% R134a (tetrafluoroethane CH2FCF3, boiling point -26.20°C, ozone-destroying potential ODP is 0 , non-toxic and non-flammable)}, 40% by mass of R290 (propane C3H8, boiling point-42.09°C, ozone-depleting potential va...

Embodiment 3

[0064] The mixed refrigerant formula includes the following raw materials in parts by weight:

[0065] The first level is: 60% by mass of R134a (tetrafluoroethane CH2FCF3, boiling point -26.50°C, ozone-depleting potential ODP of 0, non-toxic and non-flammable), 40% by mass of R600a {isobutane (CH3) 2CHCH3 , boiling point -11.73°C, ozone-depleting potential value ODP is 0, global warming coefficient value GWP is 3}, and the mass fraction is 30%;

[0066] The second grade is: 40% by mass of R22 (difluorochloromethane CHClF2, boiling point -40.80°C, ozone-destroying potential value ODP is 0.05), 40% by mass of R290 (propane C3H8, boiling point-42.09°C, ozone-destroying potential Value ODP is 0, global warming coefficient value GWP is 3.3), 20% mass fraction of R125 (pentafluoroethane C2HF5, boiling point-48.45 ℃, ozone destruction potential value ODP is 0), mass fraction 20%;

[0067] The third grade is: R23 (trifluoromethane CHF3, boiling point -84.00°C), mass fraction 20%;

...

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Abstract

The invention relates to the technical field of refrigeration in cryogenic temperature zones, and discloses a mixed refrigerant formula with a minimum temperature of -150°C, comprising: the first stage includes R134a, R142b, R141b, and R600a, and the mass fraction is 20% to 40%; two Grades include R22, R404A, R407c, R290, R125, with a mass fraction of 2% to 20%; the third grade is: R23, with a mass fraction of 10% to 30%; the fourth grade is: R14, with a mass fraction of 20% to 40%; Including R728, R740, R784, R50, the mass fraction is 5% to 10%. The present invention solves the problem that the mixed refrigerant formula with the lowest temperature can reach -150°C cryogenic temperature zone at present cannot achieve excellent refrigerating performance in the cryogenic temperature zone, and at the same time, the mixed refrigerant can further meet the environmental protection requirements to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of cryogenic temperature zone refrigeration, in particular to a mixed refrigerant formula whose lowest temperature can reach -150°C. Background technique [0002] Refrigerants, also known as refrigerants, are medium substances used in refrigeration equipment to complete energy conversion. In modern refrigeration equipment, if the compressor is used to cool down to the cryogenic temperature range of -100°C to -150°C, the three-element or four-element cascade refrigeration method is usually used, and the effective working range of the general two-stage cascade refrigeration cycle is Above -80°C, in order to obtain a lower temperature, a three-stage overlapping refrigeration cycle is required, and the lowest evaporation temperature can reach -140°C, but the overlapping refrigeration cycle above three stages is due to low work efficiency and poor economy. The reason is generally not used in industrial applicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/04
CPCC09K5/044C09K2205/122C09K2205/128C09K2205/13C09K2205/34
Inventor 杨文海
Owner 杨文海
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