CN105441031A - Low temperature heat pump special-purpose refrigerant - Google Patents
Low temperature heat pump special-purpose refrigerant Download PDFInfo
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- CN105441031A CN105441031A CN201410516452.5A CN201410516452A CN105441031A CN 105441031 A CN105441031 A CN 105441031A CN 201410516452 A CN201410516452 A CN 201410516452A CN 105441031 A CN105441031 A CN 105441031A
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- Prior art keywords
- heat pump
- low temperature
- temperature heat
- refrigerant
- better
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Abstract
The invention discloses a low temperature heat pump special-purpose refrigerant. The low temperature heat pump special-purpose refrigerant solves the problem that the existing R22 refrigerant substitutes are unsatisfactory, is used for a low temperature heat pump, has good environmental performances, can replace the R22 refrigerant for a long time, has environmental performances ODP and GWP better than those of the R22, has GWP better than that of R407c and R410a, and has evaporation pressure, which is similar to that of R22 and better than that of R410a and belongs to a direct perfusion pressure scope. In the sight of thermal parameters, parameters of the embodiment are basically same to those of the main R22 substitute so that in system replacement, a direct replacement process can be carried out and is not influenced through a system volume and the perfusion amount can be designed completely according to the original perfusion amount. The low temperature heat pump special-purpose refrigerant is mainly used for lubricating oil replacement.
Description
Technical field
The present invention relates to a kind of refrigeration agent, particularly relate to and be a kind ofly specifically designed in hot pump in low temp system the green safety refrigeration agent replacing R22.
Prior art
At present, R22 is still very extensive as the conventional refrigerant use range that consumption is maximum, but it can produce atmospheric ozone layer and destroy, and can cause Greenhouse effect, has therefore determined that the developing country for comprising China forbids R22 from the year two thousand twenty in the world.
Current, instead the refrigeration agent of R22 mainly contains R407c in the world, R410a.And being mix refrigerant, R407c composition is the three components refrigeration agent that HCF-32, HCF-125 and HCF-134a mix, and R410a is the two-pack refrigeration agent of HCF-32 and HCF-125 composition.But owing to there is larger temperature slippage and as just a kind of transition refrigeration agent in R407c, R410a proposes requirements at the higher level to complete processing due to its higher operating pressure, stagnation point is low, and to make it use in high temperature environments limited, and the limitation that the redesign of secondary parts all causes its big area to use.
Summary of the invention
The present invention is directed to all less-than-ideal situation of current R22 alternative refrigerants, have studied a kind of environmental performance being specifically designed to heat pump better, the refrigeration agent of R22 can be substituted for a long time, its Fundamental Physical Properties is made to be bordering on R22, directly can replace on the basis not needing change equipment major parts, and there is excellent thermal property and thermal parameter.
The object of the present invention is achieved like this, and this refrigeration agent contains HFC-32 and HFC-134a two kinds of refrigerant component, it is characterized in that its each constituent mass mark is respectively also containing HFC-125:
HFC-3215～55％
HFC-134a30～40％
HFC-125a35～45％
Refrigeration agent of the present invention, its preparation method is that above-mentioned each component is carried out physical mixed at normal temperatures by its corresponding proportioning (massfraction).HFC-32 in said components, i.e. methylene fluoride, molecular formula is CH
2f
2, molecular weight is 52.02, and normal boiling point is-51.7 DEG C, and critical temperature is 78.2 DEG C, and emergent pressure is 5.8MPa.
HFC-134a, i.e. 1,1,1,2-tetrafluoromethane, its molecular formula is CH
2fCF
3, molecular weight is 102.03, and normal boiling point is-26.1 DEG C, and critical temperature is 101.1 DEG C, and emergent pressure is 4.04MPa.
HFC-125, i.e. pentafluoride ethane, its molecular formula is CHF
2cF
3, molecular weight is 120, and normal boiling point is-12 DEG C, and critical temperature is 122.3 DEG C, and emergent pressure is 3.62MPa.
With following nonlimiting examples, refrigeration agent of the present invention is further described, will contributes to the present invention and understanding a little thereof, but not as a limitation of the invention.
Embodiment:
Get the HFC-32 of 27%, the HFC-134a of 33%, the HFC-125 of 40%, these three kinds of components are carried out physical mixed at normal temperatures.If the design conditions of air-conditioning, heat pump are: vaporization temperature is 7.2 DEG C, condensing temperature is 54.4 DEG C, and condensate depression is 8.3 DEG C, suction temperature 11.1 DEG C, press efficiency is 80%, according to calculating, the relevant parameters of embodiment and R22 and surrogate R407c, R410a are compared, as follows:
Table one embodiment refrigeration agent compares with R22, R407c, R410a's
| R22 | R407c | R410a | Embodiment | |
| ODP | 0.05 | 0 | 0 | 0 |
| GWP | 1700 | 1600 | 1900 | 866 |
| Evaporating pressure MPa | 0.62 | 0.68 | 1.04 | 0.67 |
| Condensing pressure MPa | 2.17 | 2.50 | 2.36 | 2.41 |
| Pressure ratio | 3.48 | 3.70 | 3.75 | 3.55 |
| Exhaust temperature DEG C | 97.2 | 86.7 | 91.2 | 92.0 |
| COP* | 1.0 | 0.91 | 0.94 | 0.92 |
| Cold * | 1.0 | 0.91 | 1.06 | 0.92 |
| Volume refrigerating capacity compressor * | 1.0 | 0.99 | 0.98 | 0.97 |
Be the ratio with R22 with * item.
From table one, the environmental performance ODP of the present embodiment and GWP is all good than R22, and GWP is better than R407c and R410a equally; Its evaporating pressure is similar to R22 and is obviously better than R410a, and belonging to can direct injection pressure scope.By on thermal parameter, each parameter of embodiment and the main surrogate of R22 remain basically stable, and this just illustrates when system is replaced, and can directly change and can not impact because of system volume, and completely according to original design charging amount, but the replacing of primary lubricant oil can be wanted in groundwater increment.
Claims (1)
1. a hot pump in low temp refrigerant special, containing methylene fluoride and 1,1,1,2-tetrafluoromethane, two kinds of components, is characterized in that its each constituent mass mark is respectively also containing pentafluoride ethane:
Methylene fluoride 15 ~ 55%
1,1,1,2-tetrafluoromethane 30 ~ 40%
Pentafluoride ethane 35 ~ 45%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410516452.5A CN105441031A (en) | 2014-09-30 | 2014-09-30 | Low temperature heat pump special-purpose refrigerant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410516452.5A CN105441031A (en) | 2014-09-30 | 2014-09-30 | Low temperature heat pump special-purpose refrigerant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105441031A true CN105441031A (en) | 2016-03-30 |
Family
ID=55551688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410516452.5A Pending CN105441031A (en) | 2014-09-30 | 2014-09-30 | Low temperature heat pump special-purpose refrigerant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105441031A (en) |
-
2014
- 2014-09-30 CN CN201410516452.5A patent/CN105441031A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160330 |
|
| WD01 | Invention patent application deemed withdrawn after publication |