CN1978581A - Medium-high-temperature heat pump set working medium - Google Patents
Medium-high-temperature heat pump set working medium Download PDFInfo
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- CN1978581A CN1978581A CN 200510107248 CN200510107248A CN1978581A CN 1978581 A CN1978581 A CN 1978581A CN 200510107248 CN200510107248 CN 200510107248 CN 200510107248 A CN200510107248 A CN 200510107248A CN 1978581 A CN1978581 A CN 1978581A
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Abstract
This invention relates to new type medium high temperature heat pump engine working medium, it is matched of various component in mass percentage such as HCFC124, HFC245fa, HC600a, HCFC22, HFC134a and so on, its component reach the requirement of the environmental protection, heat work function is fine, hindering burning commixture working medium, and may use the compression engine directly which adopts the mature technology and whose former working medium is HCFC22.
Description
Affiliated technical field
The invention belongs to the refrigeration agent in the heat pump type air conditioning system, especially be suitable as condensing temperature and be the working medium in 70-120 ℃ the moderate and high temperature heat system.
Background technology
In China heating area, along with to coal firing boiler limit the use of and to improving constantly that ambient air quality requires, heat pump set obtains everybody extensive attention gradually, 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.The high temperature refrigerant that in the past was used as heat pump usually is CFC-11 and CFC-114 etc.But because CFC-11 and CFC-114 all belong to CFC class material, the latent value ODP of its ozone depletion is respectively 1.0 and 0.85, atmospheric ozone layer there is serious destruction, and the influence of their Greenhouse effect is also very big, its chamber effect potential value GWP is respectively 4600 and 9800, developed country is in forbidding in 1996, and developing china also will be in forbidding in 2010.So it is very necessary developing environment amenable moderate and high temperature heat working medium.
Mixing medium of the present invention, 75-95 ℃ of the hot water top temperature that can provide, compliance with environmental protection requirements, thermal property is good, fire-retardant novel working medium.
Summary of the invention
The present invention is to provide one group of new working medium that is suitable for the moderate and high temperature heat unit, make it can meet the protection ozonosphere, reduce the environmental protection requirement of Greenhouse effect; Have thermal parameter and thermal property preferably again, safety, reliable, and compatible with existing HCFC-22 handpiece Water Chilling Units equipment with refrigeration oil, can directly charge, higher leaving water temperature(LWT) is provided.
Preparation method of the present invention is that each constituent element material is carried out physical mixed at normal temperatures by its specified mass percent proportioning.
High-temperature heat pump mixed working medium contains 1-chloro-1,2,2,2-Tetrafluoroethane (HCFC-124), 2-methylpropane (HC-600a), 1,1,1,3,3-pentafluoropropane (HFC-245fa), 2-1,1,1,2-Tetrafluoroethane (HFC-134a), chlorodifluoromethane (HCFC-22) waits the constituent element material.The basic parameter of each constituent element material is as described in Table 1:
The basic parameter of contained constituent element in the table 1 moderate and high temperature heat mixing medium
| Constituent element | Title | Molecular formula | Molecule | Tb/℃ | Tc/℃ | Pc/M | OD | GW |
| HCFC-12 | 1-chloro-1,2,2, the 2-tetrafluoro | CHClFCF3 | 136.4 | -12.05 | 122.5 | 3.634 | 0.02 | 440 |
| HC-600a | The 2-methylpropane | CH(CH3)2C | 58.12 | -11.7 | 134.7 | 3.64 | 0 | 20 |
| HFC-245f | 1,1,1,3, the 3-pentafluoropropane | CF3CH2CHF | 134.0 | 15.30 | 157.5 | 3.644 | 0 | 790 |
| HFC-134 | 1,1,1, the 2-tetrafluoro | CF3CH2F | 102.0 | 26.15 | 101.0 | 4.056 | 0 | 130 |
| HCFC-22 | Chlorodifluoromethane | CHClF2 | 86.47 | -40.8 | 96.2 | 4.99 | 0.03 | 170 |
This group working medium provided by the invention is characterized in that this working medium contains a chloro-1,2,2,2-Tetrafluoroethane (HCFC-124) and 2-methylpropane (HC-600a), 1,1,1,3,3-pentafluoropropane (HFC-245fa), chlorodifluoromethane (HCFC-22), 1,1,1,2-Tetrafluoroethane (HFC-134a), its component concentration (mass percent) is respectively:
HCFC124/HC600a/HFC245fa (working medium-1): 75-95%/5-1%/20-4%;
HCFC124/HCFC22 (working medium-2): 70-90%/30-10%;
HCFC124/HFC134a (working medium-3): 70-90%/30-10%.
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 moderate and high temperature heat 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.
(3) cycle performance is good: the present invention is about 4.8 at the heat supply COP under the moderate and high temperature heat design conditions, the unit mass heat supplied substantially about 110kJ/kg, the unit volume heat supplied is substantially about 4000kJ/m3.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.
Embodiment
Embodiment 1: get 75%HCFC124,5%HC600a, 20%HFC245fa, carry out at normal temperatures after the physical mixed as refrigeration agent.
Embodiment 2: get 70%HCFC124,30%HCFC22, carry out at normal temperatures after the physical mixed as refrigeration agent.
Embodiment 3: get 70%HCFC124,30%HFC134a, carry out at normal temperatures after the physical mixed as refrigeration agent.
Design conditions are: average vaporization temperature is 45 ℃, and average condensing temperature is 90 ℃, and the suction superheat temperature is 5 ℃, and supercooling temperature is 2 ℃, and it is 85% that compression process is decided entropic efficiency, the various embodiments described above have related parameter and cycle performance index as shown in table 2.
Table 2 embodiment of the invention is respectively organized thermal property
| Parameter and performance | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| ODP | 0.018 | 0.029 | 0.0165 |
| GWP | 586 | 994 | 868 |
| Relative molecular weight | 127.43 | 116.3 | 123.93 |
| Normal boiling point ℃ | -6.81 | -23.62 | -17.11 |
| Critical temperature ℃ | 130.49 | 111.77 | 114.56 |
| Emergent pressure MPa | 3.64 | 4.17 | 3.78 |
| Condensing pressure MPa | 2.0 | 2.0 | 2.0 |
| Condensing temperature ℃ | 97.47 | 75.4 | 82.81 |
| Condensation latent heat kJ/kg | 97.71 | 112.39 | 101.1 |
| Vaporization temperature ℃ | 51.8 | 30.65 | 36.81 |
| Unit volume heating capacity kJ/m3 | 3797.1 | 3977.1 | 3689.78 |
Claims (2)
1. novel moderate and high temperature heat unit working medium contains HCFC124, HFC245fa, and HC600a, HCFC22, working medium such as HFC134a is characterized in that HCFC124, HFC245fa, HC600a forms mixing medium-1 according to different mass percentage ratio; By HCFC124, HCFC22 forms mixing medium-2 according to different mass percentage ratio; By HCFC124, HFC134a forms mixing medium-3 according to different mass percentage ratio.
2. novel moderate and high temperature heat unit working medium according to claim 1 is characterized in that the concrete mass percent of described above-mentioned substance consists of:
HCFC124/HC600a/HFC245fa (working medium-1): 75-95%/5-1%/20-4%;
HCFC124/HCFC22 (working medium-2): 70-90%/30-10%;
HCFC124/HFC134a (working medium-3): 70-90%/30-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510107248 CN1978581A (en) | 2005-12-07 | 2005-12-07 | Medium-high-temperature heat pump set working medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510107248 CN1978581A (en) | 2005-12-07 | 2005-12-07 | Medium-high-temperature heat pump set working medium |
Publications (1)
| Publication Number | Publication Date |
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| CN1978581A true CN1978581A (en) | 2007-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200510107248 Pending CN1978581A (en) | 2005-12-07 | 2005-12-07 | Medium-high-temperature heat pump set working medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093848A (en) * | 2009-12-11 | 2011-06-15 | 田朝嫦 | Novel high-temperature mixed refrigerant |
| CN107674649A (en) * | 2017-10-26 | 2018-02-09 | 焦景田 | A kind of working medium group for heat pump cycle |
| CN113604200A (en) * | 2017-01-13 | 2021-11-05 | 霍尼韦尔国际公司 | Refrigerant, heat transfer compositions, methods, and systems |
-
2005
- 2005-12-07 CN CN 200510107248 patent/CN1978581A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093848A (en) * | 2009-12-11 | 2011-06-15 | 田朝嫦 | Novel high-temperature mixed refrigerant |
| CN113604200A (en) * | 2017-01-13 | 2021-11-05 | 霍尼韦尔国际公司 | Refrigerant, heat transfer compositions, methods, and systems |
| CN107674649A (en) * | 2017-10-26 | 2018-02-09 | 焦景田 | A kind of working medium group for heat pump cycle |
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