CN212106156U - Geothermal energy and solar energy organic Rankine cycle combined heat and power system - Google Patents
Geothermal energy and solar energy organic Rankine cycle combined heat and power system Download PDFInfo
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- CN212106156U CN212106156U CN202020476927.3U CN202020476927U CN212106156U CN 212106156 U CN212106156 U CN 212106156U CN 202020476927 U CN202020476927 U CN 202020476927U CN 212106156 U CN212106156 U CN 212106156U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The utility model relates to a cogeneration system of geothermal energy and solar energy organic Rankine cycle, which comprises a Rankine cycle system consisting of a flash separator, an evaporator, a secondary preheater, an expander and a generator, wherein the inlet of the flash separator is connected with a production well, the outlet I of the flash separator is connected with a recharging well after passing through a first pipeline of the secondary preheater, and the outlet II of the flash separator is connected with the recharging well; an exhaust port of the expansion machine sequentially passes through a second pipeline of the secondary preheater and a second pipeline of the evaporator and then is connected with an inlet of the expansion machine; the first pipeline of the evaporator is connected with the second pipeline of the heat accumulator to form a circulation loop; the first pipeline of the heat accumulator is connected with the solar heat collector to form a circulation loop; the expander is connected with the generator. The utility model discloses can improve the entry temperature of expander, promote the generating efficiency. Meanwhile, the cold end loss of the expansion machine can be eliminated, and the energy utilization rate is improved.
Description
Technical Field
The invention relates to a heat energy device, in particular to an improved organic Rankine cycle thermoelectric system, and specifically relates to a geothermal energy and solar organic Rankine cycle combined heat and power system.
Background
The renewable energy mainly comprises wind energy, solar energy, hydroenergy, biomass energy, geothermal energy and other energy sources. With the depletion of fossil fuels, the vigorous development of renewable energy sources is an urgent requirement at present, and the reasonable development and utilization of geothermal energy and biomass energy are increasingly regarded by the nation and the industry.
The geothermal energy is one of renewable energy sources, has the characteristics of large reserves, low carbon, cleanness and the like, can not be influenced by the sunny days and the nights, and stably and continuously provides heat. The heat of rocks and underground water within five kilometers below the earth land can meet the energy requirement of mankind for tens of thousands of years according to the consumption of 100 hundred million tons of standard coal all over the world.
At present, the conventional geothermal energy power generation system has low comprehensive energy utilization efficiency, and causes heat waste. The main reasons are: 1) the temperature of the inlet of the expansion machine is not high, and the power generation efficiency of the system is low; 2) the expander exhausts heat through the condenser, and the loss of the cold end is large.
Accordingly, there is a need for improvements in the art to improve efficiency and energy utilization.
Disclosure of Invention
The invention aims to provide a combined heat and power system for coupling geothermal energy and solar energy, aiming at the defects of the prior art, and the combined heat and power system can improve the inlet temperature of an expander and improve the power generation efficiency. Meanwhile, the cold end loss of the expansion machine can be eliminated, and the energy utilization rate is improved.
The technical scheme of the invention is as follows:
a combined heat and power system of geothermal energy and solar energy organic Rankine cycle comprises an organic Rankine cycle system consisting of a flash separator, an evaporator, a secondary preheater, an expansion machine and a generator, wherein an inlet of the flash separator is connected with a production well, an outlet I of the flash separator is connected with a recharging well after passing through a first pipeline of the secondary preheater, and an outlet II of the flash separator is connected with the recharging well; an exhaust port of the expander sequentially passes through a second pipeline of the secondary preheater and a second pipeline of the evaporator and then is connected with an inlet of the expander; the first pipeline of the evaporator is connected with the second pipeline of the heat accumulator to form a circulation loop; the first pipeline of the heat accumulator is connected with the solar heat collector to form a circulation loop; the expander is connected with the generator.
And further, the system also comprises a primary preheater, wherein a first pipeline of the primary preheater is connected between the outlet II of the flash separator and the recharging well in series, and a second pipeline of the primary preheater is connected between the exhaust port of the expansion machine and the secondary preheater in series.
Further, the system also comprises a heat supply network heat exchanger; the second pipeline of the heat supply network heat exchanger is connected with a heat user and forms a circulation loop; the first pipeline of the heat supply network heat exchanger is connected in series between the exhaust port of the expansion machine and the primary preheater.
Furthermore, a hot water pump is arranged between the heat supply network heat exchanger and a heat user.
Furthermore, a working medium pump is arranged between the primary preheater and the heat supply network heat exchanger.
Further, a medium pump I is arranged between the solar heat collector and the heat accumulator.
Further, a medium pump II is arranged between the evaporator and the heat accumulator.
Furthermore, a bypass connected in parallel with the primary preheater and the secondary preheater is arranged on a pipeline connected in series with the primary preheater and the secondary preheater; the bypass is provided with a regulating valve.
The invention has the beneficial effects that:
the invention can preheat the organic working medium through geothermal energy, and can supplement heat to the organic working medium through solar energy, thereby improving the inlet parameter of the organic working medium expander and improving the power generation efficiency of the system. Meanwhile, the waste heat exhausted by the expansion machine can be used for heat supply, the cold end loss is reduced, and the comprehensive energy utilization rate of the system is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein: 1-a production well; 2-a solar heat collector; 3-medium pump I; 4-a flash separator; 5-a heat accumulator; 6-an evaporator; 7-medium pump II; 8-a secondary preheater; 9-primary preheater; 10-a regulating valve; 11-a working medium pump; 12-an expander; 13-a generator; 14-heat network heat exchangers; 15-a hot water pump; 16-hot user; and 17-recharging the well. The arrows in the figure indicate the flow direction of the medium or hot water.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1.
A combined heat and power system of geothermal energy and solar energy organic Rankine cycle comprises a production well 1, a recharge well 17, a flash separator 4, a solar heat collector 2, a heat accumulator 5, an evaporator 6, a primary preheater 9, a secondary preheater 8, an expansion machine 12, a generator 13, a heat network heat exchanger 14 and a heat user 16.
The inlet of the flash separator 4 is connected with the production well 1, the outlet I of the flash separator is connected with the recharging well 17 after passing through the secondary preheater 8, and the outlet II of the flash separator is connected with the recharging well 17 after passing through the primary preheater 9, so that a geothermal energy system is formed. The flash separator 4 can adopt an SZ-2 type medium temperature flash separator.
An exhaust port of the expansion machine 12 is connected to an inlet of the expansion machine 12 after passing through a first pipeline of the heat supply network heat exchanger 14, the working medium pump 11, a second pipeline of the primary heat exchanger 9, a second pipeline of the secondary preheater 8 and a second pipeline of the evaporator 6, so that an organic Rankine cycle system is formed. And a first pipeline of the evaporator 6 is connected with a second pipeline of the heat accumulator 5 after passing through a medium pump II 7, and forms a circulation loop. And a first pipeline of the heat accumulator 5 is connected with the solar heat collector 2 after passing through a medium pump I3, and forms a circulation loop. Therefore, the solar heater 2 can be used as a heat supplementing device, and the obtained solar energy can be used for supplementing heat to the organic working medium in the organic Rankine cycle system through the heat accumulator 5 and the evaporator 6, so that the inlet temperature of the expansion machine 12 can be increased. Furthermore, a bypass connected in parallel with the primary preheater and the secondary preheater is arranged on a pipeline connected in series between the primary preheater 9 and the secondary preheater 8, and a regulating valve 10 is arranged on the bypass so as to regulate the flow of the organic working medium entering the primary preheater 9 and the secondary preheater 8. The organic working medium in the organic Rankine cycle system can be selected from R134a, R245fa and the like. The first-stage preheater 9 and the second-stage preheater 8 can both adopt BEM type one-way shell head-sealed tube box type heat exchangers. The regulating valve 10 adopts a ZDLP electronic type electric single-seat regulating valve. The solar heat collector 2 can adopt a groove type paraboloid solar heat collector. The heat accumulator 5 can adopt a PCM phase change heat accumulator. The heat energy can be transferred between the solar heat collector 2 and the heat accumulator 5 through heat-carrying media such as fused salt or heat transfer oil. The evaporator 6 adopts a BXM type flooded heat exchanger.
The second pipeline of the heat supply network heat exchanger 14 is connected with a heat user 16 after passing through a hot water pump 15, and a closed-loop heat supply system is formed, so that the waste heat in the exhaust gas of the expansion machine 12 is recovered, and the energy utilization rate is improved. The heat supply network heat exchanger 14 can adopt a BIU-shaped head tube box U-shaped tubular heat exchanger.
The working process of the invention is as follows:
geothermal steam-water mixture from the production well passes through a flash separator to generate geothermal flash steam and geothermal condensate, wherein the geothermal condensate is discharged from an outlet II to provide heat for a primary preheater. Geothermal flash steam is discharged from an outlet I to provide heat for the secondary preheater. And after recovering heat, the geothermal flash steam and the geothermal condensate enter a recharging well to realize cyclic utilization.
In the organic Rankine cycle system, organic working medium liquid is heated into gas with higher temperature after sequentially passing through a primary preheater, a secondary preheater and an evaporator, the gas pushes an expansion machine to do work, and the expansion machine drives a generator to generate power. And the organic working medium gas which does work is discharged from the expansion machine, enters the heat supply network heat exchanger to be cooled into liquid, and enters the working medium pump to complete the whole organic Rankine cycle. Meanwhile, the solar heat collector obtains solar energy, and the heat energy of the sun is transferred to the heat reservoir through the heat carrying medium. The heat reservoir can store solar heat energy, and the solar heat energy is transferred to the organic working medium in the Rankine cycle loop through the loop of the heat reservoir and the evaporator to supplement heat for the organic working medium, so that the temperature of the organic working medium at the inlet end of the expansion machine is increased, and the power generation efficiency is improved. When the sun is absent, the heat reservoir can continue to provide heat for the evaporator by utilizing the energy storage characteristic of the heat reservoir.
After the exhaust of expander gets into the heat supply network heat exchanger, can give hot water with the exhaust waste heat and be used for the heat supply, hot water pump is sent high temperature water to the heat consumer again, reduces the cold junction loss, improves the utilization ratio of the energy.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (8)
1. The utility model provides a cogeneration system of geothermal energy and solar energy organic Rankine cycle, includes the organic Rankine cycle system that comprises flash separator, evaporimeter, second grade preheater, expander and generator, characterized by: the inlet of the flash separator is connected with the production well, the outlet I of the flash separator is connected with the recharging well after passing through the first pipeline of the secondary preheater, and the outlet II of the flash separator is connected with the recharging well; an exhaust port of the expander sequentially passes through a second pipeline of the secondary preheater and a second pipeline of the evaporator and then is connected with an inlet of the expander; the first pipeline of the evaporator is connected with the second pipeline of the heat accumulator to form a circulation loop; the first pipeline of the heat accumulator is connected with the solar heat collector to form a circulation loop; the expander is connected with the generator.
2. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 1, wherein: the system also comprises a first-stage preheater, wherein a first pipeline of the first-stage preheater is connected in series between the outlet II of the flash separator and the recharging well, and a second pipeline of the first-stage preheater is connected in series between the exhaust port of the expansion machine and the second-stage preheater.
3. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 2, wherein: the heat supply network heat exchanger is also included; the second pipeline of the heat supply network heat exchanger is connected with a heat user and forms a circulation loop; the first pipeline of the heat supply network heat exchanger is connected in series between the exhaust port of the expansion machine and the primary preheater.
4. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 3, wherein: and a hot water pump is arranged between the heat supply network heat exchanger and a heat user.
5. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 3, wherein: and a working medium pump is arranged between the primary preheater and the heat supply network heat exchanger.
6. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 1, wherein: and a medium pump I is arranged between the solar heat collector and the heat accumulator.
7. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 1, wherein: and a medium pump II is arranged between the evaporator and the heat accumulator.
8. The cogeneration system of geothermal energy and solar energy in an organic rankine cycle of claim 2, wherein: a bypass connected in parallel with the primary preheater and the secondary preheater is arranged on a pipeline connected in series with the primary preheater and the secondary preheater; the bypass is provided with a regulating valve.
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| CN202020476927.3U CN212106156U (en) | 2020-04-03 | 2020-04-03 | Geothermal energy and solar energy organic Rankine cycle combined heat and power system |
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| CN202020476927.3U CN212106156U (en) | 2020-04-03 | 2020-04-03 | Geothermal energy and solar energy organic Rankine cycle combined heat and power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306017A (en) * | 2020-04-03 | 2020-06-19 | 南京天加热能技术有限公司 | Geothermal energy and solar energy organic Rankine cycle combined heat and power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306017A (en) * | 2020-04-03 | 2020-06-19 | 南京天加热能技术有限公司 | Geothermal energy and solar energy organic Rankine cycle combined heat and power system |
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Address after: No. 2 Hengxiang Road, Nanjing Economic and Technological Development Zone, Nanjing, Jiangsu Province, 210000 Patentee after: Nanjing Tianjia Energy Technology Co.,Ltd. Address before: 210046 No.6 Hengye Road, Nanjing Economic and Technological Development Zone, Jiangsu Province Patentee before: Nanjing tianheating Technology Co.,Ltd. |
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