CN102127397A - Mixed working medium for organic working medium rankine cycle system of screw expander - Google Patents
Mixed working medium for organic working medium rankine cycle system of screw expander Download PDFInfo
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- CN102127397A CN102127397A CN2011100224121A CN201110022412A CN102127397A CN 102127397 A CN102127397 A CN 102127397A CN 2011100224121 A CN2011100224121 A CN 2011100224121A CN 201110022412 A CN201110022412 A CN 201110022412A CN 102127397 A CN102127397 A CN 102127397A
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Abstract
The invention discloses a mixed working medium for an organic working medium rankine cycle system of a screw expander. The mixed working medium consists of two or three of four organic working media, namely HCFC(hydrochlorofluorocarbon)-123 (2,2-dichloro-1,1,1-trifluoroethane), HFC(hydro-fluoro-carbon)-245fa (1,1,1,3,3-pentafluoropropane), HFC-152a (1,1-difluoroethane) and HFC-134a (1,1,1,2-tetrafluoroethane). The sum of mass percentage of components of each mixed working medium is 100 percent. The preparation method for the mixed working medium comprises the following step of: physically mixing the components in the set mass ratio at normal temperature. The mixed working medium meets environmental protection requirement, namely has the ozone depletion potential (ODP) of zero, low global warming potential (GWP), suitable thermal parameters, good cycle performance and high cycle heat utilization rate.
Description
Technical field
The present invention relates to a kind of refrigeration, heat pump cycle working medium.Particularly relating to a kind of vaporization temperature is the mixing medium of 60-130 ℃ the organic working medium Rankine cycle system that is used for screw expander.
Background technology
Nowadays, the energy-saving and emission-reduction problem more and more is subjected to the attention of various circles of society, various power-saving technology new installations continue to bring out out, but, low-temperature cogeneration technology is ripe not enough, because, can not generate electricity with the conventional power generation usage technology for low-temp low-pressure (or normal pressure) the waste heat thermal source that is lower than 150 ℃.Organic working medium circulation screw expander system has remedied this deficiency just.This system can be used for low temperature exhaust heat and reclaims, and can generate electricity or drags Pumps ﹠ Fans as power.In addition, China's energy utilization rate is low, and in Industrial processes, it is big and wide to contain the thermal resource amount, also provides wide space for this technology.Adopt the low temperature Rankine cycle of decompressor, not only can recycle cryogenic waste heat resource, reduce the CO2 discharging, thereby reduction Greenhouse effect, can also reduce manufacturing cost, current, the developing direction of screw expander low temperature Rankine cycle technology is to improve system efficiency, and determine one of key of its development to lack suitable cycle fluid exactly.The material that in the past once was used as the working medium of Rankine cycle has CFC12, CFC113, and CFC22 etc., their ozone layer destroying gesture (ODP) and greenhouse efficient gesture (GWP) are all very high, just progressively at forbidding.At present the working medium used of low temperature ranking cycle system all concentrates on the pure matter, is that the alkanes of representative is a working medium with butane pentane etc. mostly, and it is fewer that other is applied to actual organic working medium, R134a only arranged, a few working medium such as ammonia.Though alkanes material circulation heating power better performances, it very easily fires explosive, has higher risk, thereby has limited it and further promoted the use of.R134a, working medium circulating pressures such as ammonia are higher, in the practical application equipment resistance to pressure had relatively high expectations.Therefore, the friendly type of development environment, thermal performance is good, and the novel working medium that practical application is safe and reliable is most important to the development of screw expander low temperature Rankine cycle technology.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of can be used as vaporization temperature be 60-130 ℃ with the low-temperature industrial residual heat resources, simultaneously, also can be used as the mixing medium of the organic working medium Rankine cycle system that is used for screw expander that renewable energy sources such as underground heat, sun power are the organic rankine cycle system of thermal source
The technical solution adopted in the present invention is: a kind of mixing medium that is used for the organic working medium Rankine cycle system of screw expander, be by HCFC-123 (2,2-two chloro-1,1,1 Halothane), HFC-245fa (1,1,1,3, the 3-pentafluoropropane), HFC-152a (1.1 C2H4F2 C2H4F2), HFC-134a (1,1,1,2-Tetrafluoroethane) mixing medium formed of binary in four kinds of organic working medium or ternary.
The concrete combination matching (mass percent) of described mixing medium is as follows:
R123/R152a：50-90/10-50％；
R123/R245fa：50-70/30-50％；
R123/R134a：30-65/35-70％；
R245fa/R152a：45-90/10-55％；
R245fa/R134a：50-85/15-50％；
R123/R245fa/R152a：20-80/15-50/5-50％；
R123/R245fa/R134a：25-65/10-50/25-55％；
R123/R152a/R134a：40-90/0-20/10-50％；
R245fa/R152a/R134a：20-60/5-20/30-50％。
Each constituent element material mass percentage ratio sum of every kind of mixing medium is 100%.
The preparation method of described mixing medium is that each constituent element material is carried out physical mixed at normal temperatures by the quality proportioning that sets.
The mixing medium that is used for the organic working medium Rankine cycle system of screw expander of the present invention has following characteristics:
(1) compliance with environmental protection requirements: ODP equals zero, and GWP is also very low;
(2) thermal parameter is suitable: about the following evaporating pressure 900kPa of low temperature organic rankine cycle system design conditions (as 70 ℃ of average vaporization temperatures, 40 ℃ of average condensing temperatures, saturation steam), about condensing pressure 300kPa, ratio of expansion is about 2.3;
(3) cycle performance is good: mixing medium of the present invention unit mass circulation net work output under design conditions increases than pure working medium, and about about 17kj/kg, Rankine cycle efficient is greatly about about 8% greatly;
(4) the cycling hot utilization ratio is higher: the present invention is a zeotrope, has obvious temperature glide during phase transformation, matches with heat transfer temperature difference, can effectively improve heat, thereby can improve system thermal efficiency.
Embodiment
Below in conjunction with embodiment and accompanying drawing the mixing medium that is used for the organic working medium Rankine cycle system of screw expander of the present invention is made a detailed description.
The mixing medium that is used for the organic working medium Rankine cycle system of screw expander of the present invention, be by HCFC-123 (2,2-two chloro-1,1,1 Halothane), HFC-245fa (1,1,1,3, the 3-pentafluoropropane), HFC-152a (1.1 C2H4F2 C2H4F2), HFC-134a (1,1,1,2-Tetrafluoroethane) mixing medium formed of binary in four kinds of organic working medium or ternary.
The basic parameter such as the table 1 of four kinds of above-mentioned contained constituent elements of organic working medium:
The basic parameter of contained constituent element in the table 1 low temperature organic working medium Rankine cycle mixing medium
T
b: normal boiling point; T
C: critical temperature; P
C: emergent pressure
The concrete combination matching (mass percent) of aforesaid mixing medium is as follows:
R123/R152a：50-90/10-50％；
R123/R245fa：50-70/30-50％；
R123/R134a：30-65/35-70％；
R245fa/R152a：45-90/10-55％；
R245fa/R134a：50-85/15-50％；
R123/R245fa/R152a：20-80/15-50/5-50％；
R123/R245fa/R134a：25-65/10-50/25-55％；
R123/R152a/R134a：40-90/0-20/10-50％；
R245fa/R152a/R134a：20-60/5-20/30-50％。
Each constituent element material mass percentage ratio sum of every kind of mixing medium is 100%.
The preparation method of aforesaid mixing medium is each constituent element material to be carried out physical mixed at normal temperatures by the quality proportioning that sets get final product.
Specific examples is as follows:
Example 1:
Get 82.5%HCFC-123 and 17.5%HFC-152a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 2:
Get 65.5%HCFC-123 and 34.5%HFC-245fa, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 3:
Get 60.5%HCFC-123 and 39.5%HFC-134a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 4:
Get 80.5%HFC-245fa and 19.5%HFC-152a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 5:
Get 72.5%HFC-245fa and 27.5%HFC-134a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 6:
Get 71.5%HCFC-123 and 20.5%HFC-245fa and 8%HFC-152a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 7:
Get 55%HCFC-123 and 19.5%HFC-245fa and 25.5%HFC-134a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 8:
Get 58.5%HCFC-123 and 15%HFC-152a and 26.5%HFC-134a, carry out at normal temperatures after the physical mixed as cycle fluid.
Example 9:
Get 55.5%HFC-245fa and 15.8%HFC-152a and 28.7%HFC-134a, carry out at normal temperatures after the physical mixed as cycle fluid.
With the screw expander low temperature ranking cycle system is example, and getting the average vaporization temperature of system condition is 70 ℃, and average condensing temperature is 40 ℃, and expansion process is an isoentropic process, and according to cycle calculations, above-mentioned 9 embodiment have related parameter and cycle performance index such as a table 2.
Table 2 example cycle performance of the present invention
Claims (3)
1. a mixing medium that is used for the organic working medium Rankine cycle system of screw expander is characterized in that, is by HCFC-123 (2,2-two chloro-1,1,1 Halothane), HFC-245fa (1,1,1,3, the 3-pentafluoropropane), HFC-152a (1.1 C2H4F2 C2H4F2), HFC-134a (1,1,1,2-Tetrafluoroethane) mixing medium formed of binary in four kinds of organic working medium or ternary.
2. the mixing medium that is used for the organic working medium Rankine cycle system of screw expander according to claim 1 is characterized in that, the concrete combination matching (mass percent) of described mixing medium is as follows:
R123/R152a：50-90/10-50％；
R123/R245fa：50-70/30-50％；
R123/R134a：30-65/35-70％；
R245fa/R152a：45-90/10-55％；
R245fa/R134a：50-85/15-50％；
R123/R245fa/R152a：20-80/15-50/5-50％；
R123/R245fa/R134a：25-65/10-50/25-55％；
R123/R152a/R134a：40-90/0-20/10-50％；
R245fa/R152a/R134a：20-60/5-20/30-50％。
Each constituent element material mass percentage ratio sum of every kind of mixing medium is 100%.
3. described mixing medium and the preparation method who is used for the organic working medium Rankine cycle system of screw expander of claim 1, it is characterized in that, the preparation method of described mixing medium is that each constituent element material is carried out physical mixed at normal temperatures by the quality proportioning that sets.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694962A (en) * | 2013-12-31 | 2014-04-02 | 淄博桑特动力设备有限公司 | Organic mixed working medium of steam turbine |
| CN104762065A (en) * | 2015-03-10 | 2015-07-08 | 光大环保（中国）有限公司 | Organic rankine cycle mixed working medium and preparation method thereof |
| CN105623616A (en) * | 2016-02-29 | 2016-06-01 | 哈尔滨工程大学 | Rankine cycle mixing working media 1,1,2,2,3-pentafluoropropane and heptafluoropropane for recycling diesel waste heat and waste heat recycling method |
| CN105670566A (en) * | 2016-02-29 | 2016-06-15 | 哈尔滨工程大学 | Waste heat recovery Rankine cycle refrigerant mixture 1,1,1,3,3-perfluoropropane and 1,1,1-trifluoroethane and waste heat recovery method |
| CN105670567A (en) * | 2016-02-29 | 2016-06-15 | 哈尔滨工程大学 | Mixed working medium of 1,1,2,2,3-perfluoropropane and 1,1,1-halothane and waste heat recovery method |
| CN109679583A (en) * | 2018-12-17 | 2019-04-26 | 江苏大学 | The mixed working fluid of middle low temperature Organic Rankine Cycle |
| CN111925775A (en) * | 2013-03-14 | 2020-11-13 | 霍尼韦尔国际公司 | Low GWP fluids for high temperature heat pump applications |
| CN114736655A (en) * | 2013-03-14 | 2022-07-12 | 霍尼韦尔国际公司 | Low GWP fluids for high temperature heat pump applications |
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| EP0314978A1 (en) * | 1987-10-19 | 1989-05-10 | Daikin Industries, Limited | Refrigerants |
| CN1425734A (en) * | 2003-01-20 | 2003-06-25 | 天津大学 | A group of high temperature heat pump mixed working medium |
| CN1563253A (en) * | 2004-04-05 | 2005-01-12 | 天津大学 | A group of mixed working media containing HFCs for high temperature heat pump |
| CN101235273A (en) * | 2007-12-28 | 2008-08-06 | 天津大学 | Binary mixture actuating medium used for solar energy low-temperature Rankine circulation system |
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2011
- 2011-01-19 CN CN2011100224121A patent/CN102127397A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0314978A1 (en) * | 1987-10-19 | 1989-05-10 | Daikin Industries, Limited | Refrigerants |
| CN1425734A (en) * | 2003-01-20 | 2003-06-25 | 天津大学 | A group of high temperature heat pump mixed working medium |
| CN1563253A (en) * | 2004-04-05 | 2005-01-12 | 天津大学 | A group of mixed working media containing HFCs for high temperature heat pump |
| CN101235273A (en) * | 2007-12-28 | 2008-08-06 | 天津大学 | Binary mixture actuating medium used for solar energy low-temperature Rankine circulation system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925775A (en) * | 2013-03-14 | 2020-11-13 | 霍尼韦尔国际公司 | Low GWP fluids for high temperature heat pump applications |
| CN114736655A (en) * | 2013-03-14 | 2022-07-12 | 霍尼韦尔国际公司 | Low GWP fluids for high temperature heat pump applications |
| CN103694962A (en) * | 2013-12-31 | 2014-04-02 | 淄博桑特动力设备有限公司 | Organic mixed working medium of steam turbine |
| CN104762065A (en) * | 2015-03-10 | 2015-07-08 | 光大环保（中国）有限公司 | Organic rankine cycle mixed working medium and preparation method thereof |
| CN105623616A (en) * | 2016-02-29 | 2016-06-01 | 哈尔滨工程大学 | Rankine cycle mixing working media 1,1,2,2,3-pentafluoropropane and heptafluoropropane for recycling diesel waste heat and waste heat recycling method |
| CN105670566A (en) * | 2016-02-29 | 2016-06-15 | 哈尔滨工程大学 | Waste heat recovery Rankine cycle refrigerant mixture 1,1,1,3,3-perfluoropropane and 1,1,1-trifluoroethane and waste heat recovery method |
| CN105670567A (en) * | 2016-02-29 | 2016-06-15 | 哈尔滨工程大学 | Mixed working medium of 1,1,2,2,3-perfluoropropane and 1,1,1-halothane and waste heat recovery method |
| CN109679583A (en) * | 2018-12-17 | 2019-04-26 | 江苏大学 | The mixed working fluid of middle low temperature Organic Rankine Cycle |
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Application publication date: 20110720 |