CN102911643A - Transcritical power cycle mixed working fluid containing 1,1,1-trifluoro ethane (R143a) - Google Patents
Transcritical power cycle mixed working fluid containing 1,1,1-trifluoro ethane (R143a) Download PDFInfo
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- CN102911643A CN102911643A CN2012103536844A CN201210353684A CN102911643A CN 102911643 A CN102911643 A CN 102911643A CN 2012103536844 A CN2012103536844 A CN 2012103536844A CN 201210353684 A CN201210353684 A CN 201210353684A CN 102911643 A CN102911643 A CN 102911643A
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Abstract
The invention discloses a group of transcritical power cycle mixed working fluid containing 1,1,1-trifluoro ethane (R143a), which is suitable to be used as a refrigerant of a low-temperature transcritical power cycle system with the resource temperature being 70-100 DEG C. The group of mixed working fluid is a binary mixture composed of R143a, R41 (fluoromethane) and CO2 according to different mass ratios. The preparation method comprises the step of carrying out physical mixing the components at ordinary temperature according to the appointed ratio to obtain corresponding mixed working fluid. The working fluid does not destroy ozonosphere, is lower in greenhouse effect potential, conforms to environmental protection requirements, and is proper in heat engineering parameters and excellent in cycle performances; and under the design condition, the Rankine cycle efficiency is about 6% and the net output power of the system is above 9.8kW.
Description
Technical field
The invention belongs to the refrigeration agent in heat pump or the air-conditioning system, being specifically related to as the resource temperature is that the low temperature of 70-100 ° of C is striden the working medium in the critical power circulation system.
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 be paid close attention to.Why the low temperature resource generates electricity is utilized economy relatively poor, is to lack the cycle fluid that is fit on the one hand, and on the other hand, the economics of power generation of subcritical organic Rankine Recycle design is lower.Therefore adopt and stride critical power cycle mode, and 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, provide one group to be applicable to the mixing medium that low-temperature electricity-generating is striden critical power cycle, can be used as the low-temperature geothermal resource of 70-100 ° of C, or other low-grade (such as used heat, sun power etc.) thermal source stride working medium in the critical power system.
The critical power cycle mixed working medium of striding that the present invention proposes has comprised 3 kinds of constituent element materials altogether, specifically: 1,1,1-Halothane (R143a), carbonic acid gas (CO
2) and fluoromethane (R41).
The basic parameter of each constituent element material is as shown in table 1.
The critical power cycle mixed working medium of striding that contains 1,1,1-Halothane (R143a) that the present invention proposes specifically consists of: by R143a(1, and 1,1-Halothane) and CO
2(carbonic acid gas) forms; Or by R143a(1,1,1-Halothane) and the R41(fluoromethane) form.
The concrete proportioning (mass percent) of above-mentioned its each constituent element of mixing medium is:
R143a/CO
2 2-93/7-98%，
R143a/R41 3-95/5-97%，
Each constituent element material mass percentage ratio sum of above every kind of mixing medium is 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: stride under the critical power circulation system design conditions (the narrow some temperature that such as the GEOTHERMAL WATER flow is 1kg/s, 90 ° of C of GEOTHERMAL WATER inlet temperature, 84 ° of C of steam turbine inlet temperature, cooling water inlet temperature 20 ° of C, vaporizer and condensers is respectively 5 ° of C) evaporating pressure about 8000.0kPa, condensing pressure about 4000.0kPa, ratio of expansion is about 2.
(3) cycle performance: the present invention is about 6% in the Rankine cycle efficient under the above-mentioned design conditions, (be in the steam turbine isentropic efficiency 80% condition under) more than the 9.8kW, cycle performance is good substantially for system's net power output.
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 30
Mass%R143a and 70
Mass%CO
2, carry out at normal temperatures after the physical mixed as refrigeration agent.
Embodiment 2: get 50
Mass%R143a and 50
Mass%CO
2, carry out at normal temperatures after the physical mixed as refrigeration agent.
Embodiment 3: get 70
Mass%R143a and 30
Mass%CO
2, carry out at normal temperatures after the physical mixed as refrigeration agent.
Embodiment 4: get 30
Mass%R143a and 70
Mass%R41 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 5: get 50
Mass%R143a and 50
Mass%R41 carries out after the physical mixed at normal temperatures as refrigeration agent.
Embodiment 6: get 70
Mass%R143a and 30
Mass%R41 carries out after the physical mixed at normal temperatures as refrigeration agent.
Stride critical power cycle as example take low temperature underground heat, low temperature underground heat is striden critical power circulation system design conditions and is taken as: the GEOTHERMAL WATER flow is that 1kg/s, 90 ° of C of GEOTHERMAL WATER inlet temperature, 84 ° of C of steam turbine inlet temperature, 20 ° of C of cooling water inlet temperature, narrow some temperature of two devices are respectively 5 ° of C, expansion process decide entropic efficiency be 80% and working medium pump efficient be 75%, according to cycle calculations, the relevant parameters of above-mentioned 6 embodiment and cycle performance index are as shown in table 2.
Table 2 embodiment of the invention performance
Claims (2)
1. contain the critical power cycle mixed working medium of striding of 1,1-Halothane (R143a), it is characterized in that mixing medium by R143a(1,1,1-Halothane) and CO
2(carbonic acid gas) forms; Or by R143a(1,1,1-Halothane) and the R41(fluoromethane) form.
2. according to the critical power cycle mixed working medium of striding that contains 1,1,1-Halothane (R143a) claimed in claim 1, it is characterized in that the concrete proportioning (mass percent) of described each constituent element material is:
R143a/CO
2 2-93/7-98%，
R143a/R41 3-95/5-97%，
Each constituent element material mass percentage ratio sum of above every kind of mixing medium is 100%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103536844A CN102911643A (en) | 2010-07-09 | 2010-07-09 | Transcritical power cycle mixed working fluid containing 1,1,1-trifluoro ethane (R143a) |
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|---|---|---|---|
| CN2012103536844A CN102911643A (en) | 2010-07-09 | 2010-07-09 | Transcritical power cycle mixed working fluid containing 1,1,1-trifluoro ethane (R143a) |
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|---|---|---|---|
| CN2010102228866A Division CN101914368A (en) | 2010-07-09 | 2010-07-09 | Transcritical power cycle mixed working medium |
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| Publication Number | Publication Date |
|---|---|
| CN102911643A true CN102911643A (en) | 2013-02-06 |
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ID=47610228
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103536844A Pending CN102911643A (en) | 2010-07-09 | 2010-07-09 | Transcritical power cycle mixed working fluid containing 1,1,1-trifluoro ethane (R143a) |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4116274A1 (en) * | 1991-05-17 | 1992-11-19 | Forschungszentrum Fuer Kaeltet | Environmentally-acceptable, non-CFC refrigerant - consists of mixt. of carbon di:oxide and partly fluorinated hydrocarbon(s), esp. R32, R143A, R125 etc. |
| WO1996002605A1 (en) * | 1994-07-13 | 1996-02-01 | Imperial Chemical Industries Plc | Refrigerant compositions |
-
2010
- 2010-07-09 CN CN2012103536844A patent/CN102911643A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4116274A1 (en) * | 1991-05-17 | 1992-11-19 | Forschungszentrum Fuer Kaeltet | Environmentally-acceptable, non-CFC refrigerant - consists of mixt. of carbon di:oxide and partly fluorinated hydrocarbon(s), esp. R32, R143A, R125 etc. |
| WO1996002605A1 (en) * | 1994-07-13 | 1996-02-01 | Imperial Chemical Industries Plc | Refrigerant compositions |
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Application publication date: 20130206 |