CN103694962A - Organic mixed working medium of steam turbine - Google Patents
Organic mixed working medium of steam turbine Download PDFInfo
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- CN103694962A CN103694962A CN201310751734.9A CN201310751734A CN103694962A CN 103694962 A CN103694962 A CN 103694962A CN 201310751734 A CN201310751734 A CN 201310751734A CN 103694962 A CN103694962 A CN 103694962A
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- working medium
- heat transfer
- organic
- r245fa
- mixed
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Abstract
The invention belongs to the technical field of organic working mediums and in particular relates to an organic mixed working medium of a steam turbine. The sum of the mass percentage of the components is 100%; the working medium consists of R245fa and R123; the mass percentage of the R245fa to the R123 is (60-70) : (30-40). The working medium has different-temperature thermodynamic characteristics in a constant-pressure evaporation or condensation process. The working medium is optimally matched with cold/heat source temperature in evaporation equipment or condensation equipment by selecting the components of the mixed organic working medium and optically selecting the proportion of the components. Bubbles generated by the low-boiling-point organic working medium in the pipe generates perturbation action on the mixed organic working medium by utilizing the non-azeotropic characteristic of the mixed working medium, so that a heat transfer enhancement effect is achieved, the boiling heat transfer coefficient is increased, the optimal region of the heat transfer coefficient is enlarged, the heat transfer coefficient is increased by 6 to 10% through experimental test, and the area of heat transfer equipment is reduced.
Description
Technical field
The present invention relates to the organic mixing medium of a kind of steam turbine, belong to organic working medium technical field.
Background technology
At present, single organic working medium organic Rankine circulates in the existing practical application of power field, but the problem that the optimization problem of single organic rankie cycle power generation system is organic rankie cycle generating, will face at low-temperature cogeneration system structure optimization, reduction afterheat generating system cost.Although mix organic working medium existing application in air conditioner refrigerating and heat-pump apparatus, also not practical application in low-temperature cogeneration organic Rankine circulating technology.
Summary of the invention
According to above deficiency of the prior art, the technical problem to be solved in the present invention is: the organic mixing medium of steam turbine that a kind of heat transfer effect is strong, can reduce heat-exchange equipment cost is provided.
The organic mixing medium of steam turbine of the present invention, the mass percent sum of each component is 100%, and this working medium is comprised of R245fa, two kinds of components of R123, and the mass percent of R245fa and R123 is (60～70): (30～40).
Above-mentioned mixing organic working medium compound method: will mix each component of organic working medium by matching ratio, and inject respectively in container for storing liquid, working medium is naturally mixed in tank.
In said components:
R245fa(pentafluoropropane), molecular formula CF
3cH
2cHF
2, molecular weight 134,58.8 ℃ of boiling points, 256.9 ℃ of critical temperatures, emergent pressure 464.1Mpa;
R123(trifluorobichloroethane), molecular formula CF
3cHCl
2, molecular weight 152.93,27.85 ℃ of boiling points, 183.68 ℃ of critical temperatures, emergent pressure 3668KPa.
This mixing organic working medium, by the coupling of moiety, utilizes working medium to have the thermodynamic characteristics that temperature is different in level pressure evaporation or condensation process, utilizes the characteristic of the non-azeotropic point of mixing medium, enhanced heat exchange effect, and then reduce heat-exchange equipment cost.
The beneficial effect that the present invention compared with prior art had is:
The organic mixing medium of this steam turbine utilizes working medium to have the thermodynamic characteristics that temperature is different in level pressure evaporation or condensation process, by the optimized choice to proportioning between the selection of mixing organic working medium moiety and each moiety, make working medium have mating of optimization with Cooling and Heat Source temperature in evaporation equipment or condensing equipment, utilize the characteristic of the non-azeotropic point of mixing medium, make to manage the bubble that interior lower boiling organic working medium generates, to mixing organic working medium operating mode, produce perturbation action, thereby play enhanced heat exchange effect, and then boiling heat transfer coefficient is increased and the growth of coefficient of heat transfer best region, through the experiment test coefficient of heat transfer, increase by 6～10%, thereby significantly reduce heat-exchange equipment area.
Embodiment
Below in conjunction with embodiment, the present invention is described further:
Embodiment 1:
The R123 of 60% R245fa and 40% is injected respectively in container for storing liquid, and working medium is naturally mixed application in tank, and the coefficient of heat transfer that experiment test obtains mixing medium is: 7200w/ (m
2k).
Embodiment 2:
The R123 of 64% R245fa and 36% is injected respectively in container for storing liquid, and working medium is naturally mixed application in tank, and the coefficient of heat transfer that experiment test obtains mixing medium is: 7000w/ (m
2k).
Embodiment 3:
The R123 of 67% R245fa and 33% is injected respectively in container for storing liquid, and working medium is naturally mixed application in tank, and the coefficient of heat transfer that experiment test obtains mixing medium is: 6000w/ (m
2k).
Embodiment 4:
The R123 of 70% R245fa and 40% is injected respectively in container for storing liquid, and working medium is naturally mixed application in tank, and the coefficient of heat transfer that experiment test obtains mixing medium is: 6250w/ (m
2k).
From above-described embodiment, the organic mixing medium being formed by R245fa, R123, its coefficient of heat transfer is far away higher than the tradition list working medium coefficient of heat transfer 5590 ± 70w/ (m
2k), thus can enhanced heat exchange effect, significantly reduce heat-exchange equipment area.
Each organic working medium of the organic mixing medium of steam turbine of the present invention belongs to conventional organic working medium, meets the international organic working medium standard of using, and GDP and ODP value meet the international use standard that allows.
Claims (1)
1. the organic mixing medium of steam turbine, the mass percent sum of each component is 100%, it is characterized in that: this working medium is comprised of R245fa, two kinds of components of R123, and the mass percent of R245fa and R123 is (60～70): (30～40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751734.9A CN103694962A (en) | 2013-12-31 | 2013-12-31 | Organic mixed working medium of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751734.9A CN103694962A (en) | 2013-12-31 | 2013-12-31 | Organic mixed working medium of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103694962A true CN103694962A (en) | 2014-04-02 |
Family
ID=50356632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310751734.9A Pending CN103694962A (en) | 2013-12-31 | 2013-12-31 | Organic mixed working medium of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103694962A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117542807A (en) * | 2024-01-09 | 2024-02-09 | 广东海洋大学 | Composite phase-change load cooling and recycling device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6362153B1 (en) * | 1998-12-24 | 2002-03-26 | Honeywell International Inc. | Compositions of pentafluoropropane and dichlorotrifluoroethane |
| 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 |
-
2013
- 2013-12-31 CN CN201310751734.9A patent/CN103694962A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6362153B1 (en) * | 1998-12-24 | 2002-03-26 | Honeywell International Inc. | Compositions of pentafluoropropane and dichlorotrifluoroethane |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117542807A (en) * | 2024-01-09 | 2024-02-09 | 广东海洋大学 | Composite phase-change load cooling and recycling device |
| CN117542807B (en) * | 2024-01-09 | 2024-03-29 | 广东海洋大学 | Composite phase-change load cooling and recycling device |
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Application publication date: 20140402 |
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| RJ01 | Rejection of invention patent application after publication |