CN1233779C - A group of high temperature heat pump mixed working medium - Google Patents
A group of high temperature heat pump mixed working medium Download PDFInfo
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- CN1233779C CN1233779C CN 03100577 CN03100577A CN1233779C CN 1233779 C CN1233779 C CN 1233779C CN 03100577 CN03100577 CN 03100577 CN 03100577 A CN03100577 A CN 03100577A CN 1233779 C CN1233779 C CN 1233779C
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- hcfc
- hfc
- heat pump
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- temperature heat
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Abstract
The present invention relates to a group of mixed working mediums for a high temperature heat pump. The mixed working mediums are binary mixtures and ternary mixtures prepared by physically mixing HCFC-123, HCFC-124, HFC-134a, HCFC-142b, HFC-152a and HFC-245 fa at normal temperature according to different mass ratios, and are suitable for being used as a refrigerant for a high temperature heat pump system at the condensing temperature of 100 to 160DEGC. The working mediums of the present invention have the advantages of no damage to the ozonosphere, low greenhouse effect, environmental protection, proper hot working parameter and good circulation performance. The high temperature heat pump system can be optimized by an HCFC22 air conditioning compressor and the working mediums of the present invention can be directly filled into the existing HCFC22 air conditioning unit to convert the HCFC22 air conditioning unit to a high temperature heat pump unit of the working mediums.
Description
Technical field
The invention belongs to the refrigeration agent in heat pump or refrigeration, the air-conditioning system, especially be suitable as condensing temperature and be the refrigeration working medium in 100-160 ℃ the high temperature heat pump system.
Background technology
For produce and life in a large amount of that exist, to heat energy grade requirement relatively low (temperature is 60-160 ℃) with can link, adopt the heat pump heat supply technology that the total energy utilising efficiency higher than conventional energy-provision way not only arranged, minimizing CO
2Discharging (thereby reducing Greenhouse effect) also can effectively utilize the low grade heat energy that contains in industrial exhaust heat, Geothermal energy, sun power and the environment (air, soil, surface water or shallow ground water), reduces the thermal pollution that the waste heat discharging causes.Current, high temperature in the heat pump techniques forward (condensing temperature is 80-100 ℃), high temperature (condensing temperature is higher than 100 ℃) heat pump direction develop, and restrict one of key issue of its development, are exactly to lack the cycle fluid that is fit to.The material that in the past once was used as high temperature heat pump system working medium has CFC11, CFC113, CFC114 etc., they are CFC class material, its depletion of the ozone layer gesture (ODP) and global warming potential (GWP) are all very big, and developed country is in forbidding in 1996, and developing country also will be in forbidding in 2010.What application was more at present is the air-conditioning-heat pump of working medium with HCFC22 or its surrogate R407C, R410A etc., the hot water top temperature that can provide is 50-55 ℃, and (high more not only cycle performance worsens, also will cause the accident because of the pressure and the warm upper limit of row that breaks through system), the heat energy of higher temperature level can't be provided.Development environment close friend, the good novel working medium of thermal performance are most important to the development of high temperature heat pump technology.
Mixing medium provided by the invention is to be that 100-160 ℃ high temperature heat pump system is used and to be developed for satisfying condensing temperature, also can be used as centrifugal refrigerating, air conditioning unit working medium.
Summary of the invention
The purpose of this invention is to provide one group and be suitable for the new working medium that the high temperature heat pump unit is used, make its environmental characteristics and cycle performance all good.
Content introduction of the present invention and embodiment: a kind of high-temperature heat pump mixed working medium is characterized in that being made up of HFC-134a (1,1,1, the 2-Tetrafluoroethane), HCFC-142b (chloro-1,1-C2H4F2 C2H4F2) and HCFC-123; Or by HCFC-124 (chloro-1,2,2,2-Tetrafluoroethane), HCFC-142b and HCFC-123 composition; Or by HFC-134a, HCFC-123 and HFC-245fa (1,1,1,3, the 3-pentafluoropropane) composition; Or form by HCFC-124, HCFC-123 and HFC-245fa.Its concrete proportioning (mass percent) is:
HFC-134a/HCFC-142b/HCFC-123：5-60/10-50/30-90％，
HCFC-124/HCFC-142b/HCFC-123：10-60/10-50/30-90％
HFC-134a/HCFC-123/HFC-245fa:10-60/20-90/0-50%, wherein the content of constituent element HFC-245fa is not 0,
HCFC-124/HCFC-123/HFC-245fa:10-60/15-90/0-50%, wherein the content of constituent element HFC-245fa is not 0,
More than each constituent element material mass percentage ratio sum of every kind of mixing medium be 100%.
Preparation method of the present invention is that each constituent element material is carried out physical mixed at normal temperatures by its specified quality proportioning.The present invention has the following advantages and beneficial effect:
(1) compliance with environmental protection requirements: ODP approaches zero, GWP also very low (basically less than 1000).(2) thermal parameter is suitable: under the high temperature heat pump design conditions, and close under the standard air conditioning condition of stress level and HCFC22, row's temperature is lower than row's temperature of HCFC22 compressor and limits.Therefore, can adopt the compressor of air conditioner of HCFC22 in the high temperature heat pump system design, need not to be working medium of the present invention specialized designs compressor separately.(3) cycle performance is good: the present invention is about 4.8 at the heat supply COP under the high temperature heat pump design conditions, the unit mass heat supplied substantially more than 110kJ/kg, the unit volume heat supplied is substantially at 4000kJ/m
3More than.The interchanger load is close with the HCFC22 air-conditioning system, working medium of the present invention directly can be poured into (some working medium requires more oil change) air conditioning unit in existing HCFC22, be translated into the high temperature heat pump unit of new working medium, efficiency and unit main hardware matching degree can guarantee to circulate.
The basic parameter of contained constituent element in table 1 high-temperature heat pump mixed working medium
T
b: normal boiling point, T
c: critical temperature, P
c: emergent pressure
| Constituent element | Title | Molecular formula | Molecular weight | T b ℃ | T c ℃ | P c MPa | ODP | GWP |
| HCFC123 | 1,1-two chloro-2,2,2-Halothane | CHCl 2CF 3 | 152.93 | 27.85 | 183.79 | 3.674 | 0.02 | 90 |
| HCFC124 | One chloro-, 1,2,2 2-Tetrafluoroethanes | CHClFCF 3 | 136.48 | -12.05 | 122.50 | 3.634 | 0.02 | 440 |
| HFC134a | 1,1,1, the 2-Tetrafluoroethane | CF 3CH 2F | 102.03 | -26.15 | 101.06 | 4.056 | 0 | 1300 |
| HCFC142b | 1-one chloro-1,1 C2H4F2 C2H4F2 | CClF 2CH 3 | 100.50 | -9.25 | 137.1 | 4.246 | 0.06 | 1800 |
| HFC152a | 1.1-C2H4F2 C2H4F2 | CHF 2CH 3 | 66.05 | -24.15 | 113.29 | 4.520 | 0 | 150 |
| HFC245fa | 1,1,1,3, the 3-pentafluoropropane | CF 3CH 2CHF 2 | 134.0 | 15.30 | 157.50 | 3.644 | 0 | 790 |
Embodiment
Embodiment 1: get 15
Mass%HFC-134a, 40
Mass%HFC-245fa, 45
Mass%HCFC-123 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 2: get 37
Mass%HCFC-124,39
Mass%HFC-245fa, 24
Mass%HCFC-123 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 3: get 10
Mass%HFC-134a, 31
Mass%HCFC-142b, 59
Mass%HCFC-123 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 4: get 21
Mass%HCFC-124,31
Mass%HCFC-142b, 48
Mass%HCFC-123 carries out after the physical mixed at normal temperatures as refrigeration agent.
If the design conditions of heat pump are taken as: average vaporization temperature is 70 ℃, average condensing temperature is 120 ℃, the suction superheat temperature be 5 ℃ (to some working medium, for guaranteeing to avoid wet compression, getting the exhaust superheating temperature is 5 ℃), supercooling temperature is 5 ℃, it is 85% that compression process is decided entropic efficiency, according to cycle calculations, above-mentioned 4 embodiment have related parameter and cycle performance index as shown in table 2.
Table 2 embodiment of the invention performance
| Parameter and performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Evaporating pressure MPa | 0.591 | 0.711 | 0.646 | 0.718 |
| Condensing pressure MPa | 1.944 | 2.122 | 2.080 | 2.151 |
| Pressure ratio | 3.29 | 2.99 | 3.22 | 2.99 |
| Exhaust temperature ℃ | 129.82 | 127.5 | 130.1 | 128.6 |
| COP | 4.87 | 4.81 | 4.73 | 4.80 |
| Heat supplied kJ/kg | 128.2 | 109.0 | 129.1 | 118.7 |
| Unit volume heating capacity kJ/m 3 | 3938 | 4243 | 4154 | 4370 |
| ODP | 0.008 | 0.012 | 0.0332 | 0.0360 |
| GWP | 612 | 503 | 902.1 | 844 |
Claims (2)
1. a high-temperature heat pump mixed working medium is characterized in that being made up of HFC-134a (1,1,1, the 2-Tetrafluoroethane), HCFC-142b (chloro-1,1-C2H4F2 C2H4F2) and HCFC-123; Or by HCFC-124 (chloro-1,2,2,2-Tetrafluoroethane), HCFC-142b and HCFC-123 composition; Or by HFC-134a, HCFC-123 and HFC-245fa (1,1,1,3, the 3-pentafluoropropane) composition; Or form by HCFC-124, HCFC-123 and HFC-245fa.
2. according to the described a kind of high-temperature heat pump mixed working medium of claim 1, it is characterized in that the concrete proportioning (mass percent) of above-mentioned each constituent element material is:
HFC-134a/HCFC-142b/HCFC-123：5-60/10-50/30-90％，
HCFC-124/HCFC-142b/HCFC-123：10-60/10-50/30-90％，
HFC-134a/HCFC-123/HFC-245fa:10-60/20-90/0-50%, wherein the content of constituent element HFC-245fa is not 0,
HCFC-124/HCFC-123/HFC-245fa:10-60/15-90/0-50%, wherein the content of constituent element HFC-245fa is not 0,
More than each constituent element material mass percentage ratio sum of every kind of mixing medium be 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100577 CN1233779C (en) | 2003-01-20 | 2003-01-20 | A group of high temperature heat pump mixed working medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03100577 CN1233779C (en) | 2003-01-20 | 2003-01-20 | A group of high temperature heat pump mixed working medium |
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| CN1425734A CN1425734A (en) | 2003-06-25 |
| CN1233779C true CN1233779C (en) | 2005-12-28 |
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| CN 03100577 Expired - Fee Related CN1233779C (en) | 2003-01-20 | 2003-01-20 | A group of high temperature heat pump mixed working medium |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387674C (en) * | 2005-01-14 | 2008-05-14 | 天津大学 | Mixed substance containing HCFC-142b(chloro-1,1-difluoroethane) for moderate and high temperature heat pump |
| CN1326967C (en) * | 2005-11-11 | 2007-07-18 | 清华大学 | Zero zone destruction and mixed working medium suitable for compression type heat pump |
| CN101186807B (en) * | 2007-12-01 | 2011-01-26 | 广东长菱空调冷气机制造有限公司 | Mixed refrigerant |
| CN102127397A (en) * | 2011-01-19 | 2011-07-20 | 天津大学 | Mixed working medium for organic working medium rankine cycle system of screw expander |
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