CN112459857A - Double-pressure organic Rankine cycle power generation system - Google Patents
Double-pressure organic Rankine cycle power generation system Download PDFInfo
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- CN112459857A CN112459857A CN202011347357.9A CN202011347357A CN112459857A CN 112459857 A CN112459857 A CN 112459857A CN 202011347357 A CN202011347357 A CN 202011347357A CN 112459857 A CN112459857 A CN 112459857A
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- 238000010248 power generation Methods 0.000 title claims abstract description 23
- 229920006395 saturated elastomer Polymers 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011555 saturated liquid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
- F01K21/04—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
Abstract
The invention provides a double-pressure organic Rankine cycle power generation system which adopts two-stage organic Rankine cycle and comprises a high-pressure evaporator (1), a reheater (2), a low-pressure evaporator (3), a first working medium pump (4), a second working medium pump (5), a high-pressure turbine (6), a condenser (7), a first power generator (8), a low-pressure turbine (9) and a second power generator (10); the heat source is divided into three sections of high temperature, medium temperature and low temperature for utilization, and the heat source sequentially enters a high-pressure evaporator, a reheater and a low-pressure evaporator; the high pressure evaporator utilizes the high temperature section of the heat source, the reheater utilizes the medium temperature section of the heat source, and the low pressure evaporator utilizes the low temperature section of the heat source.
Description
Technical Field
The invention belongs to the field of medium-low grade heat energy power generation systems, and particularly relates to a novel dual-pressure organic Rankine cycle power generation system.
Background
Referring to fig. 1, fig. 1 shows a single-pressure organic rankine cycle power generation system, which includes an evaporator, a turbine, a condenser, a working medium pump and a generator.
The low-temperature low-pressure organic working medium (liquid) enters the evaporator after being boosted by the working medium pump; absorbing heat provided by a heat source in an evaporator to form high-temperature high-pressure gas; the power enters a turbine to do expansion work and drive a generator to generate power; the organic working medium (gas) after expansion acting enters a condenser to be cooled into liquid; and returning to the working medium pump to complete a complete organic Rankine cycle.
For a single-pressure organic Rankine cycle power generation system, the system has low thermal efficiency, the net output power of the system is low due to the fact that medium-low-grade heat energy cannot be efficiently utilized, and the cost of power generation of the system is high due to the low net output power.
Referring to fig. 2, fig. 2 is a dual-pressure organic rankine cycle power generation system, which is divided into a high-pressure organic rankine cycle power generation system and a low-pressure organic rankine cycle power generation system; all comprise an evaporator, a turbine, a condenser, a working medium pump and a generator.
The method comprises the following steps that a heat source firstly enters an evaporator of the high-pressure organic Rankine cycle, heat is released in the evaporator of the high-pressure organic Rankine cycle to heat a working medium of the high-pressure cycle, then the heat source enters an evaporator of the low-pressure cycle to release heat, the working medium of the low-pressure cycle is heated, and then the working medium flows out; the organic working medium in the high-pressure circulation absorbs heat in the evaporator and evaporates until saturated gas enters a turbine to expand and do work, and a generator is driven to generate electricity; the organic working medium (gas) after expansion acting enters a condenser to be cooled into liquid; returning to the working medium pump to complete a complete organic Rankine cycle; the low pressure cycle is cycled in the same manner as the high pressure cycle.
Compared with the conventional organic Rankine cycle, the dual-pressure organic Rankine cycle power generation system can effectively improve the net output power of the system and improve the heat matching property of the heat source and the working medium, but the heat matching property of the heat source and the working medium and the net output power of the system have a space for further improving.
Disclosure of Invention
The invention provides a novel dual-pressure organic Rankine cycle power generation system which improves the net output power of the system, improves the heat matching property of a heat source and a working medium and reduces the average power generation cost. In order to solve the problems, the invention adopts the following technical scheme:
a double-pressure organic Rankine cycle power generation system adopts two-stage organic Rankine cycle and comprises a high-pressure evaporator (1), a reheater (2), a low-pressure evaporator (3), a first working medium pump (4), a second working medium pump (5), a high-pressure turbine (6), a condenser (7), a first power generator (8), a low-pressure turbine (9) and a second power generator (10); the heat source is divided into three sections of high temperature, medium temperature and low temperature for utilization, and the heat source sequentially enters a high-pressure evaporator, a reheater and a low-pressure evaporator; the high-pressure evaporator utilizes a high-temperature section of a heat source, the reheater utilizes a medium-temperature section of the heat source, and the low-pressure evaporator utilizes a low-temperature section of the heat source;
the organic working medium from the condenser is divided into two paths which are respectively pressurized by a first working medium pump and a second working medium pump, wherein one path of the organic working medium pressurized by the first working medium pump enters a low-pressure evaporator to absorb the heat energy of the low-temperature section of the heat source and evaporate to saturated gas to flow out; the other path of organic working medium boosted by the second working medium pump enters a high-pressure evaporator to absorb heat energy of a high-temperature section of the heat source and evaporate the heat energy to saturated gas to form high-temperature high-pressure gas, and the high-temperature high-pressure gas enters a high-pressure turbine to expand and do work and drive a first generator to generate electricity;
mixing the exhaust steam from the high pressure turbine with the saturated steam from the low pressure evaporator; the mixed organic working medium steam enters a reheater for further heating and temperature rise, then enters a low-pressure turbine for expansion work, and drives a second generator to generate power; the organic working medium gas flowing out of the low-pressure turbine enters a condenser to release heat and is condensed to saturated liquid, and a cycle is completed.
According to the invention, the heat source is divided into three sections of high temperature, medium temperature and low temperature for utilization, so that the heat matching property of the heat source and the organic working medium is improved, the efficient utilization of the heat source is realized, the net output power of the system is improved, and the power generation cost of the system is reduced.
Drawings
FIG. 1 is a single-pressure organic Rankine cycle power generation system
FIG. 2 shows a conventional dual-pressure organic Rankine cycle power generation system
FIG. 3 is a dual pressure organic Rankine cycle power generation system of the present invention
In the attached drawing 3, 1 is a high-pressure evaporator, 2 is a reheater, 3 is a low-pressure evaporator, 4 is a working medium pump, 5 is a working medium pump, 6 is a high-pressure turbine, 7 is a condenser, 8 is a generator, 9 is a low-pressure turbine, 10 is a generator.
Detailed Description
The invention is further described below with reference to fig. 3.
The invention provides a novel dual-pressure organic Rankine cycle power generation system which improves the net output power of the system, improves the heat matching property of a heat source and a working medium and reduces the average power generation cost.
As shown in fig. 3, the heat source is divided into three sections of high temperature, medium temperature and low temperature for use, and the heat source sequentially enters the high-pressure evaporator 1, the reheater 2 and the low-pressure evaporator 3; the high-pressure evaporator 1 utilizes a high-temperature section of a heat source, the reheater 2 utilizes a medium-temperature section of the heat source, and the low-pressure evaporator 3 utilizes a low-temperature section of the heat source; the organic working medium from the condenser 7 is divided into two paths and is respectively pressurized by the working medium pump 4 and the working medium pump 5; one path of organic working medium boosted by the working medium pump 4 enters the low-pressure evaporator 3 to absorb heat energy of the low-temperature section of the heat source and evaporate to saturated gas to flow out; in addition, one path of organic working medium boosted by the working medium pump 5 enters the high-pressure evaporator 1 to absorb heat energy of a high-temperature section of a heat source and evaporate the heat energy to saturated gas to form high-temperature high-pressure gas, and the high-temperature high-pressure gas enters the high-pressure turbine 6 to perform expansion work and drive the generator 8 to generate power; the high-pressure turbine designed according to the working medium flow and the inlet pressure can ensure that the pressure of exhaust steam flowing out of the high-pressure turbine 6 is the same as the pressure flowing out of the low-pressure evaporator 3 under a rated working condition, and the exhaust steam flowing out of the high-pressure turbine 6 is mixed with saturated steam flowing out of the low-pressure evaporator 3; the mixed organic working medium steam enters a reheater 2 for further heating and temperature rise, then enters a low-pressure turbine 9 for expansion work, and drives a generator 10 to generate power; the organic working medium gas flowing out of the low-pressure turbine 9 enters the condenser 7 to release heat to be condensed into saturated liquid, and a cycle is completed.
According to the invention, the heat source is divided into three sections of high temperature, medium temperature and low temperature for utilization, so that the heat matching property of the heat source and the organic working medium is improved, and the heat loss is reduced; the outlet temperature of the heat source off-development electric system is reduced, the efficient utilization of the heat source is realized, and the net output work of the system is improved; the power generation cost of medium and low grade heat energy is reduced.
The above description is only illustrative of the specific embodiments of the present invention, and the scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the claims and the content of the specification of the present invention are within the protection scope of the present invention.
Claims (1)
1. A double-pressure organic Rankine cycle power generation system adopts two-stage organic Rankine cycle and comprises a high-pressure evaporator (1), a reheater (2), a low-pressure evaporator (3), a first working medium pump (4), a second working medium pump (5), a high-pressure turbine (6), a condenser (7), a first power generator (8), a low-pressure turbine (9) and a second power generator (10); the heat source is divided into three sections of high temperature, medium temperature and low temperature for utilization, and the heat source sequentially enters a high-pressure evaporator, a reheater and a low-pressure evaporator; the high pressure evaporator utilizes the high temperature section of the heat source, the reheater utilizes the medium temperature section of the heat source, and the low pressure evaporator utilizes the low temperature section of the heat source.
The organic working medium from the condenser is divided into two paths which are respectively pressurized by a first working medium pump and a second working medium pump, wherein one path of the organic working medium pressurized by the first working medium pump enters a low-pressure evaporator to absorb the heat energy of the low-temperature section of the heat source and evaporate to saturated gas to flow out; the other path of organic working medium boosted by the second working medium pump enters a high-pressure evaporator to absorb heat energy of a high-temperature section of the heat source and evaporate the heat energy to saturated gas to form high-temperature high-pressure gas, and the high-temperature high-pressure gas enters a high-pressure turbine to expand and do work and drive a first generator to generate electricity;
mixing the exhaust steam from the high pressure turbine with the saturated steam from the low pressure evaporator; the mixed organic working medium steam enters a reheater for further heating and temperature rise, then enters a low-pressure turbine for expansion work, and drives a second generator to generate power; the organic working medium gas flowing out of the low-pressure turbine enters a condenser to release heat and is condensed to saturated liquid, and a cycle is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011347357.9A CN112459857A (en) | 2020-11-26 | 2020-11-26 | Double-pressure organic Rankine cycle power generation system |
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| CN202011347357.9A CN112459857A (en) | 2020-11-26 | 2020-11-26 | Double-pressure organic Rankine cycle power generation system |
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| CN202011347357.9A Pending CN112459857A (en) | 2020-11-26 | 2020-11-26 | Double-pressure organic Rankine cycle power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309678A (en) * | 2021-06-20 | 2021-08-27 | 山东电力研究院 | Two-stage turbine ocean temperature difference energy thermal cycle power generation system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101499636B1 (en) * | 2014-02-12 | 2015-03-06 | 부산대학교 산학협력단 | Organic Rankine Cycle system with attaching solar expander modules |
| CN106150579A (en) * | 2015-04-20 | 2016-11-23 | 中国海洋石油总公司 | A kind of horizontal two grade utility LNG Trans-critical cycle cold energy Rankine cycle electricity generation system |
| CN106640248A (en) * | 2017-01-09 | 2017-05-10 | 大连理工大学 | Two-stage transcritical Rankine cycle power generation system using geothermal energy |
| CN106762489A (en) * | 2016-12-27 | 2017-05-31 | 福州大学 | A kind of electricity generation system based on low-temperature solar energy and cold energy of liquefied natural gas |
| CN110761960A (en) * | 2019-10-10 | 2020-02-07 | 东方电气集团东方汽轮机有限公司 | Geothermal-coupling LNG cold energy reheating power generation system and method |
| CN111441836A (en) * | 2020-04-16 | 2020-07-24 | 天津大学 | Superimposed organic Rankine cycle for replacing mixed working medium and adjusting method thereof |
-
2020
- 2020-11-26 CN CN202011347357.9A patent/CN112459857A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101499636B1 (en) * | 2014-02-12 | 2015-03-06 | 부산대학교 산학협력단 | Organic Rankine Cycle system with attaching solar expander modules |
| CN106150579A (en) * | 2015-04-20 | 2016-11-23 | 中国海洋石油总公司 | A kind of horizontal two grade utility LNG Trans-critical cycle cold energy Rankine cycle electricity generation system |
| CN106762489A (en) * | 2016-12-27 | 2017-05-31 | 福州大学 | A kind of electricity generation system based on low-temperature solar energy and cold energy of liquefied natural gas |
| CN106640248A (en) * | 2017-01-09 | 2017-05-10 | 大连理工大学 | Two-stage transcritical Rankine cycle power generation system using geothermal energy |
| CN110761960A (en) * | 2019-10-10 | 2020-02-07 | 东方电气集团东方汽轮机有限公司 | Geothermal-coupling LNG cold energy reheating power generation system and method |
| CN111441836A (en) * | 2020-04-16 | 2020-07-24 | 天津大学 | Superimposed organic Rankine cycle for replacing mixed working medium and adjusting method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李健等: "双压蒸发有机朗肯循环系统火用分析", 《工程热物理学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309678A (en) * | 2021-06-20 | 2021-08-27 | 山东电力研究院 | Two-stage turbine ocean temperature difference energy thermal cycle power generation system and method |
| CN113309678B (en) * | 2021-06-20 | 2023-02-03 | 国网山东省电力公司电力科学研究院 | Two-stage turbine ocean temperature difference energy thermal cycle power generation system and method |
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Application publication date: 20210309 |