CN102925113A - Organic Rankine cycle mixed refrigerant containing HFC-236fa (1,1,1,3,3,3-hexafluoropropane) - Google Patents
Organic Rankine cycle mixed refrigerant containing HFC-236fa (1,1,1,3,3,3-hexafluoropropane) Download PDFInfo
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- CN102925113A CN102925113A CN201210455759XA CN201210455759A CN102925113A CN 102925113 A CN102925113 A CN 102925113A CN 201210455759X A CN201210455759X A CN 201210455759XA CN 201210455759 A CN201210455759 A CN 201210455759A CN 102925113 A CN102925113 A CN 102925113A
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Abstract
The organic Rankine cycle mixed refrigerant containing HFC-236fa (1,1,1,3,3,3-hexafluoropropane) is suitable for being used as the refrigerant of a low temperature organic Rankine cycle system with evaporating temperature of 60 DEG C to 100 DEG C. The mixed refrigerant is of a ternary mixture consisting of three substances including HFO-1234yf (FC3CF=CH2,2,3,3,3,-tetra-chloro-1-propylene), HFC-236fa (1,1,1,3,3,3-hexafluoropropane) and HFC-245fa (1,1,1,3,3-perfluoropropane) mixed according to different mass ratios. The preparation method is as follows: physically mixing each component according to an appointed proportion, thereby obtaining the corresponding mixed refrigerant. The refrigerant provided by the invention does not destroy the ozone layer, is relatively low in greenhouse effect potential, meets the environmental protection requirement, and is proper in thermal parameter and excellent in circulating performance. Under a designed working condition, the Rankine cycle efficiency is about 9.5%, and the unit mass net output is basically higher than 18kJ/kg.
Description
The present invention is that name is called: " contain HFO-1234yf (CF
3CF=CH
2) mixed working fluid for organic rankine cycle " divide an application, the applying date is on October 13rd, 2009, application number is 200910070780.6.
Technical field
The invention belongs to the refrigeration agent in heat pump or the air-conditioning system, being specifically related to as vaporization temperature is working medium in the low temperature organic rankine cycle system of 60-100 ° of C.
Background technology
The research of low temperature resource (such as cryogenically heat energy, used heat or sun power) generation technology is for reducing fossil energy consumption and CO
2, SO
2, NO
xThe discharging of isothermal chamber gas and environmental pollutant realizes that Sustainable development is significant.And one of major technique factor that the generating of restriction low temperature resource utilizes is exactly system economy.Middle temperature resource generation technology practice shows, take the generation technology better economy of organic Rankine circulation as the basis.
In recent years, continuing to increase of the challenge that brings along with the energy and environment problem, and the lifting of the economics of power generation that brings of technical progress, the utilization that always is considered to not possess the low temperature resource (particularly 70-120 ° of C temperature range) of economics of power generation begins to obtain to pay close attention to.Why the low temperature resource generates electricity is utilized economy relatively poor, and its one of the main reasons is exactly to lack the cycle fluid that is fit to.Working medium as the circulation of low temperature organic Rankine has C5F12, HC600 etc. at present, or they are because global warming potential (GWP) is very large, or because of inflammable and explosive, apply and limited it.Therefore develop a kind of environmental friendliness, the good novel working medium of thermal performance, most important to the development of low temperature organic Rankine circulating technology.
Summary of the invention
The objective of the invention is, a kind of mixing medium that contains HFC-236fa that is applicable to the circulation of low temperature organic Rankine is provided, can be used as the low-temperature geothermal resource that vaporization temperature is 60-100 ° of C, or the working medium in the organic rankine cycle system of other low-grade (such as used heat, sun power etc.) thermal source.
The mixed working fluid for organic rankine cycle that contains HFC-236fa that the present invention proposes has comprised 10 kinds of constituent element materials altogether, specifically: HFO-1234yf (CF
3CF=CH
2, 2,3,3,3-tetrafluoro-1-propene), HFC-143 (1,1,2-Halothane), HFC-236ea (1,1,1,2,3,3-HFC-236fa), HFC-236fa (1,1,1,3,3,3 ,-HFC-236fa), HFC-245ca (1,1,2,2,3-pentafluoropropane), HFC-245fa (1,1,1,3,3-pentafluoropropane), CF
3I (CF3I), HFE-143 (CH
2FOCHF
2), HFE-134 (CHF
2OCHF
2) and HFC-254cb (1,1,2,2-tetrafluoropropane).The basic parameter of each constituent element material is as shown in table 1.
The mixed working fluid for organic rankine cycle that contains HFO-1234yf that the present invention proposes specifically consists of:
By HFO-1234yf (CF
3CF=CH
2), HFC-236fa (1,1,1,3,3,3-HFC-236fa) and HFC-143 (1,1,2-Halothane) form; Or by HFO-1234yf, HFC-236fa and HFC-245fa (1,1,2,2,3-pentafluoropropane) composition; Or by HFO-1234yf, HFC-152a (1,1-C2H4F2 C2H4F2) and HFC-254cb (1,1,2,2-tetrafluoropropane) composition; Or by HFO-1234yf, HFC-152a and HFC-245ca (1,1,2,2,3-pentafluoropropane) composition; Or by HFO-1234yf, HFC-152a and HFC-236ea (1,1,1,2,3,3-HFC-236fa) composition; Or by HFO-1234yf, HFC-152a and HFE-134 (CHF
2OCHF
2) form; Or formed by HFO-1234yf, HFC-152a and HFE-143; Or formed by HFO-1234yf, HFC-152a and HFC-245fa; Or by HFO-1234yf, CF
3I (CF3I) and HFC-254cb form; Or by HFO-1234yf, CF
3I and HFC-245ca form; Or by HFO-1234yf, CF
3I and HFC-236ea form; Or by HFO-1234yf, CF
3I and HFE-134 form; Or by HFO-1234yf, CF
3I and HFE-143 (CH
2FOCHF
2) form; Or by HFO-1234yf, CF
3I and HFC-245fa form; Or by HFO-1234yf, HFC-143 (1,1,2-Halothane) and HFC-245fa composition.
HFO-1234yf/HFC-236fa/HFC-143 3-91/4-92/5-93%，
HFO-1234yf/HFC-236fa/HFC-245fa 5-45/2-93/2-93，
HFO-1234yf/HFC-152a/HFC-254cb 5-60/0-92/1-95%，
HFO-1234yf/HFC-152a/HFC-245ca 7-95/0-92/1-93%，
HFO-1234yf/HFC-152a/HFC-236ea 4-97/0-94/2-96%，
HFO-1234yf/HFC-152a/HFE-134 4-97/0-92/1-96%，
HFO-1234yf/HFC-152a/HFE-143 3-91/4-92/5-93%，
HFO-1234yf/HFC-152a/HFC-245fa 2-96/1-95/3-97%，
HFO-1234yf/CF
3I/HFC-254cb 2-60/3-94/4-95%，
HFO-1234yf/CF
3I/HFC-245ca 2-93/1-92/2-97%，
HFO-1234yf/CF
3I/HFC-236ea 2-95/3-95/2-95%，
HFO-1234yf/CF
3I/HFE-134 1-97/1-97/2-98%，
HFO-1234yf/CF
3I/HFE-143 7-91/0-87/5-93%，
HFO-1234yf/CF
3I/HFC-245fa 3-92/3-91/5-93%，
HFO-1234yf/HFC-143/HFC-245fa 5-97/0-94/1-95%。
More than each constituent element material mass percentage ratio sum of every kind of mixing medium be 100%.The preparation method of above-mentioned mixing medium is each constituent element material to be carried out physical mixed at normal temperatures by the quality proportioning of its appointment get final product.
The present invention has the following advantages and beneficial effect:
(1) environmental performance: ODP of the present invention equals zero, and environmental characteristics is good.(2) thermal parameter: low temperature organic rankine cycle system design conditions (as the evaporating pressure under 90 ° of C of vaporization temperature, 35 ° of C of condensing temperature, 5 ° of C of superheating temperature or 0 ° of C of weary gas superheating temperature about 1500.0kPa, condensing pressure about 350.0kPa, ratio of expansion is about 4.50.(3) cycle performance: the present invention is about 9.5% in the Rankine cycle efficient under the above-mentioned design conditions, (be in the steam turbine isentropic efficiency 75% condition under) more than the 23kJ/kg, cycle performance is good substantially for unit mass output net work.
The basic parameter of contained constituent element in the table 1 low temperature mixed working fluid for organic rankine cycle
T
b: normal boiling point, T
c: critical temperature, P
c: emergent pressure
Embodiment
Embodiment 1: get 32
Mass%HFO-1234yf, 15
Mass%HFC-236fa and 53
Mass%HFC-143 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 2: get 32
Mass%HFO-1234yf, 10
Mass%HFC-236fa and 58
Mass%HFC-245fa carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 3: get 1
Mass%HFO-1234yf, 2
Mass%HFC-152a and 83
Mass%HFC-254cb carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 4: get 38
Mass%HFO-1234yf, 10
Mass%HFC-152a and 52
Mass%HFC-254ca carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 5: get 12
Mass%HFO-1234yf, 5
Mass%HFC-152a and 83
Mass%HFC-236ea carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 6: get 26
Mass%HFO-1234yf, 3
Mass%HFC-152a and 71
MassCarry out under the %HFE-134, normal temperature after the physical mixed as refrigeration agent.
Embodiment 7: get 57
Mass%HFO-1234yf, 4
Mass%HFC-152a and 39
Mass%HFE-143 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 8: get 16
Mass%HFO-1234yf, 15
Mass%HFC-152a and 69
Mass%HFC-245fa carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 9: get 3
Mass%HFO-1234yf, 45
Mass%CF
3I and 52
Mass%HFC-254cb carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 10: get 10
Mass%HFO-1234yf, 38
Mass%CF
3I and 52
Mass%HFC-245ca carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 11: get 4
Mass%HFO-1234yf, 36
Mass%CF
3I and 60
Mass%HFC-236ea carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 12: get 21
Mass%HFO-1234yf, 18
Mass%CF
3I and 61
Mass%HFE-134 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 13: get 11
Mass%HFO-1234yf, 70
Mass%CF
3I and 19
Mass%HFE-143 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 14: get 26
Mass%HFO-1234yf, 20
Mass%CF
3I and 54
Mass%HFC-245fa carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 15: get 35
Mass%HFO-1234yf, 10
Mass%HFC-143 and 55
Mass%HFC-245fa carries out after the physical mixed at normal temperatures as refrigeration agent.
Take the circulation of low temperature underground heat organic Rankine as example, low temperature underground heat organic rankine cycle system design conditions are taken as: average vaporization temperature is 90 ° of C, average condensing temperature is 30 ° of C, the evaporation superheating temperature is that 5 ° of C are (to some working medium, enter two-phase region for guaranteeing to avoid expanding ending, getting weary gas superheating temperature is 0 ° of C, the evaporation superheating temperature of inverse is 6-10 ° of C with this understanding), expansion process decides entropic efficiency and working medium pump efficient is 75%, according to cycle calculations, the relevant parameters of above-mentioned 15 embodiment and cycle performance index are as shown in table 2.
Table 2 embodiment of the invention performance
| Parameter and performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Evaporating pressure MPa | 1.6448 | 1.5982 | 1.5669 | 1.5863 | 1.576 | 1.5852 |
| Condensing pressure MPa | 0.3672 | 0.3437 | 0.35648 | 0.3393 | 0.32737 | 0.35894 |
| Steam turbine import specific volume m 3/kg | 4.8819 | 5.2816 | 4.9492 | 5.1281 | 5.4774 | 4.7787 |
| Ratio of expansion | 4.4788 | 4.6489 | 4.3955 | 4.6745 | 4.8139 | 4.4164 |
| Unit mass output net work kJ/kg | 27.041 | 21.8740 | 23.6220 | 25.2010 | 20.859 | 23.07 |
| Cycle efficiency % | 0.0979 | 0.0926 | 0.0961 | 0.0935 | 0.09412 | 0.09805 |
| Vaporization temperature slippage ° C | 5.5924 | 7.8610 | 3.3362 | 16.8040 | 4.1566 | 6.4262 |
| Condensing temperature slippage ° C | 7.9096 | 12.2410 | 4.3415 | 22.5890 | 6.7991 | 8.4492 |
| Parameter and performance | Embodiment 7 | Embodiment 8 | Embodiment 9 | Embodiment 10 | Embodiment 11 | Embodiment 12 |
| Evaporating pressure MPa | 1.6227 | 1.6026 | 1.6229 | 1.201 | 1.5709 | 1.5808 |
| Condensing pressure MPa | 0.34315 | 0.33976 | 0.3786 | 0.25358 | 0.33643 | 0.36089 |
| Steam turbine import specific volume m 3/kg | 5.1226 | 5.221 | 4.7731 | 5.0197 | 5.2588 | 4.7321 |
| Ratio of expansion | 4.7288 | 4.7169 | 4.2861 | 4.7359 | 4.6695 | 4.3803 |
| Unit mass output net work kJ/kg | 27.453 | 25.064 | 18.3430 | 20.022 | 17.109 | 20.731 |
[0049]
| Cycle efficiency | 0.09477 | 0.09505 | 0.0981 | 0.09512 | 0.09611 | 0.09846 |
| Vaporization temperature slippage ° C | 18.946 | 8.4247 | 2.2204 | 13.359 | 2.717 | 5.7457 |
| Condensing temperature slippage ° C | 26.268 | 12.268 | 3.4117 | 18.713 | 5.4495 | 7.8389 |
| Parameter and performance | Embodiment 13 | Embodiment 14 | Embodiment 15 |
| Evaporating pressure MPa | 1.5937 | 1.6168 | 1.5929 |
| Condensing pressure MPa | 0.35088 | 0.35198 | 0.3445 |
| Steam turbine import specific volume m 3/kg | 4.7519 | 5.1649 | 5.1786 |
| Ratio of expansion | 4.542 | 4.5935 | 4.6240 |
| Unit mass output net work kJ/kg | 18.08 | 20.331 | 23.3880 |
| Cycle efficiency | 0.10024 | 0.09385 | 0.0938 |
| Vaporization temperature slippage ° C | 12.472 | 7.8336 | 8.1994 |
| Condensing temperature slippage ° C | 18.965 | 12.395 | 12.4650 |
Claims (1)
1. the mixed working fluid for organic rankine cycle that contains HFC-236fa (1,1,1,3,3,3 ,-HFC-236fa) is characterized in that mixing medium is by HFO-1234yf (CF
3CF=CH
2, 2,3,3,3-tetrafluoro-1-propene), HFC-236fa (1,1,1,3,3,3 ,-HFC-236fa) and HFC-245fa (1,1,2,2,3-pentafluoropropane) form; The mass percent of three constituent element materials is specially:
HFO-1234yf/HFC-236fa/HFC-245fa, 5-45/2-93/2-93, the mass percent sum of each component materials is 100%.
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|---|---|---|---|
| CN201210455759XA CN102925113A (en) | 2009-10-13 | 2009-10-13 | Organic Rankine cycle mixed refrigerant containing HFC-236fa (1,1,1,3,3,3-hexafluoropropane) |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112867774A (en) * | 2018-10-15 | 2021-05-28 | 霍尼韦尔国际公司 | Azeotrope or azeotrope-like composition of trifluoroiodomethane (CF3I) and 1,1,1,3,3, 3-hexafluoropropane (HFC-236fa) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101415793A (en) * | 2006-03-30 | 2009-04-22 | 纳幕尔杜邦公司 | Compositions comprising a fluoroolefin |
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2009
- 2009-10-13 CN CN201210455759XA patent/CN102925113A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101415793A (en) * | 2006-03-30 | 2009-04-22 | 纳幕尔杜邦公司 | Compositions comprising a fluoroolefin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112867774A (en) * | 2018-10-15 | 2021-05-28 | 霍尼韦尔国际公司 | Azeotrope or azeotrope-like composition of trifluoroiodomethane (CF3I) and 1,1,1,3,3, 3-hexafluoropropane (HFC-236fa) |
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