CN217270640U - Photo-thermal enhanced organic Rankine cycle geothermal power generation system - Google Patents
Photo-thermal enhanced organic Rankine cycle geothermal power generation system Download PDFInfo
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- CN217270640U CN217270640U CN202221348637.6U CN202221348637U CN217270640U CN 217270640 U CN217270640 U CN 217270640U CN 202221348637 U CN202221348637 U CN 202221348637U CN 217270640 U CN217270640 U CN 217270640U
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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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Abstract
The utility model belongs to the technical field of geothermal power generation and specifically relates to a carry out coupling design with geothermal energy electricity generation and solar electric system to improve geothermal generating set's installed capacity and the organic rankine cycle geothermal power generation system of light and heat enhancement mode of generating benefit. The utility model provides a technical scheme that its technical problem adopted is: the photothermal enhancement type organic Rankine cycle geothermal power generation system comprises a primary geothermal heat exchange device, wherein the primary geothermal heat exchange device comprises a geothermal fluid pipeline and a working medium fluid pipeline, and comprises a solar heat collection device and a secondary geothermal heat exchange device provided with the geothermal fluid pipeline and the working medium fluid pipeline, the outlet of the geothermal fluid pipeline of the primary geothermal heat exchange device is communicated with the inlet of the solar heat collection device, and the outlet of the solar heat collection device is communicated with the inlet of the geothermal fluid pipeline of the secondary geothermal heat exchange device. The utility model discloses be particularly useful for the area that geothermal energy and solar energy all can utilize and use.
Description
Technical Field
The utility model belongs to the technical field of geothermal power generation and specifically relates to a light and heat enhancement mode organic rankine cycle geothermal power generation system.
Background
Geothermal energy and solar energy belong to renewable clean energy sources and have the characteristics of wide distribution, large storage capacity and cyclic utilization. By utilizing geothermal energy and solar energy resources to generate electricity, good carbon emission reduction benefits can be realized, and the method is more important especially under the current 'double carbon' target background of China. According to the natural conditions of geothermal energy and solar energy resources in China, China has geothermal energy and solar energy resources which can generate electricity and has certain geographical position overlapping property. In certain areas of the Qinghai-Tibet plateau, for example, there are abundant lighting conditions and high temperature geothermal fields available for power generation. In addition, the power generation by utilizing the two energy sources has obvious short plates: geothermal power generation is not influenced by the environment, the annual utilization hours are high, but the power generation power is limited by geothermal heat storage temperature, flow and the like, and the power generation efficiency is not high generally; the photo-thermal power generation steam parameters are controllable, super-high pressure level superheated steam (550 ℃ and 14MPa) can be generated, the power generation efficiency is high, the annual utilization hours limited by environmental fluctuation are low, and an intermediate heat conduction system and an energy storage system with a certain scale need to be configured to optimize the generated energy, so that the process system is complex, and the engineering investment and the occupied area are greatly increased. Therefore, the coupling design of the geothermal energy power generation system and the solar power generation system is realized, the geothermal tail water after primary power generation is directly heated and heated through solar energy and is sent to a unit for secondary power generation, and the method is a simple and efficient mode for utilizing renewable energy.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a carry out coupling design with geothermal energy power generation and solar power system is provided to full play geothermal energy electricity generation and solar energy power generation advantage separately, thereby improve geothermal power generating set's installed capacity and the organic rankine cycle geothermal power generation system of light and heat enhancement mode of generating benefit.
The utility model provides a technical scheme that its technical problem adopted is: the photothermal enhancement type organic Rankine cycle geothermal power generation system comprises a primary geothermal heat exchange device, wherein the primary geothermal heat exchange device comprises a geothermal fluid pipeline and a working medium fluid pipeline, and comprises a solar heat collection device and a secondary geothermal heat exchange device provided with the geothermal fluid pipeline and the working medium fluid pipeline, the outlet of the geothermal fluid pipeline of the primary geothermal heat exchange device is communicated with the inlet of the solar heat collection device, and the outlet of the solar heat collection device is communicated with the inlet of the geothermal fluid pipeline of the secondary geothermal heat exchange device.
The primary geothermal heat exchange device comprises an evaporator and a preheater which are communicated with each other, wherein geothermal fluid in the primary geothermal heat exchange device is communicated with an inlet of the solar heat collection device after sequentially passing through the evaporator and the preheater, and working medium fluid in the primary geothermal heat exchange device is communicated with the power generation equipment after sequentially passing through the preheater and the evaporator.
The secondary geothermal heat exchange device comprises an evaporator and a preheater which are communicated with each other, wherein geothermal fluid flowing out of the solar heat collection device sequentially passes through the evaporator and the preheater of the secondary geothermal heat exchange device, and working medium fluid in the secondary geothermal heat exchange device sequentially passes through the preheater and the evaporator of the secondary geothermal heat exchange device and then is communicated with the power generation equipment.
Further, a recharging pump is arranged at a geothermal fluid flow outlet of the secondary geothermal heat exchange device.
Further, the pumping direction of the recharge pump is towards the recharge well.
Furthermore, a geothermal fluid pipeline of the primary geothermal heat exchange device is communicated with a geothermal production well.
Furthermore, a primary three-way valve is arranged at the outlet of the geothermal fluid pipeline of the primary geothermal heat exchange device, a secondary three-way valve is arranged at the outlet of the geothermal fluid pipeline of the secondary geothermal heat exchange device, and the primary three-way valve and the secondary three-way valve are communicated with each other.
Furthermore, a working medium fluid three-way valve is arranged at the inlet of the working medium fluid pipeline of the secondary geothermal heat exchange device and is communicated with the inlet of the working medium fluid pipeline of the primary geothermal heat exchange device.
Furthermore, the working medium fluid of the primary geothermal heat exchange device is recycled for the next time after sequentially passing through the corresponding turbine and the air cooling island.
Furthermore, the working medium fluid of the secondary geothermal heat exchange device is recycled for the next time after sequentially passing through the corresponding turbine and the air cooling island.
The beneficial effects of the utility model are that: firstly, in areas with abundant illumination conditions and high-temperature geothermal resources, the technical scheme provided by the utility model is adopted, a solar heat collection device, namely a solar energy enhancement system, is utilized to heat geothermal tail water after primary power generation, and the geothermal tail water is sent to a unit for secondary power generation, thereby realizing the cascade utilization of local renewable resources and expanding the installed capacity and the power generation benefit of the unit; secondly, the utility model provides a light and heat enhancement mode organic rankine cycle geothermal power generation system, wherein solar energy enhancement system adopts direct thermal cycle technology, and the terrestrial heat tail water of the hot water outlet of one-level geothermal heat exchange module is directly heated to the solar radiation energy of gathering promptly, compares with traditional light and heat indirect thermal cycle technology, has saved middle heat conduction system and energy storage system, makes the process systems simpler, and the engineering investment is lower; and thirdly, when the solar energy enhancement system does not work, the geothermal generator set can still operate, and the generating efficiency of the generator set is hardly influenced. The utility model discloses be particularly useful for the area that geothermal energy and solar energy all can utilize and use.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Labeled as: the system comprises a geothermal production well 1, an evaporator 2, a preheater 3, a primary three-way valve 4, a solar heat collection device 5, an evaporator 6, a secondary three-way valve 8, a recharge pump 9, a recharge well 10, a primary turbine 11, a primary generator 12, an air cooling island 13, a working medium pump 14, a secondary generator 15, a secondary turbine 16, a working medium fluid three-way valve 17, a geothermal fluid 111, a working medium fluid 112, a primary geothermal heat exchange device 21 and a secondary geothermal heat exchange device 61.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The photo-thermal enhanced organic rankine cycle geothermal power generation system shown in fig. 1 comprises a primary geothermal heat exchange device 21, wherein the primary geothermal heat exchange device 21 comprises a geothermal fluid pipeline and a working fluid pipeline, and comprises a solar heat collection device 5 and a secondary geothermal heat exchange device 61 provided with the geothermal fluid pipeline and the working fluid pipeline, an outlet of the geothermal fluid pipeline of the primary geothermal heat exchange device 21 is communicated with an inlet of the solar heat collection device 5, and an outlet of the solar heat collection device 5 is communicated with an inlet of the geothermal fluid pipeline of the secondary geothermal heat exchange device 61.
The solar heat collecting device 5 is generally composed of a plurality of solar light-gathering and heat-collecting modules, and preferably adopts a trough type heat collecting mode to heat the geothermal fluid flowing out of the primary geothermal heat exchanging device 21, so that the temperature of the geothermal fluid entering the secondary geothermal heat exchanging device 61 is increased. Generally, the circulating working medium of the power generation system is preferably selected to be a low-boiling-point organic working medium. In practical use, when the system is completely put into operation, organic working medium steam generated by the primary geothermal heat exchange device 21 and the secondary geothermal heat exchange device 61 is respectively led into the primary turbine 11 and the secondary turbine 16 to be flushed and converted for power generation, the power generation power of the generator set is the maximum, and the geothermal tail water recharging bypass is not put into operation. When the solar heat collection device 5 is stopped due to factors such as external weather, only organic working medium steam generated by the primary geothermal heat exchange device 21 is introduced into the primary turbine 11 to generate electricity, and meanwhile, geothermal tail water at a hot water outlet of the primary geothermal heat exchange device 21 is boosted by the recharge pump 9 through a recharge bypass and then is conveyed to the recharge well 10 to be recharged, generally, the recharge pump 9 is preferably arranged at a geothermal fluid outlet of the secondary geothermal heat exchange device 61, and the pumping direction of the recharge pump 9 is towards the recharge well 10. The geothermal fluid pipeline of the primary geothermal heat exchange device 21 is communicated with the geothermal production well 1, so that the geothermal fluid is supplied continuously.
In order to achieve higher heat exchange efficiency of the primary geothermal heat exchange device 21, it is preferable that the primary geothermal heat exchange device 21 includes an evaporator 2 and a preheater 3 which are communicated with each other, wherein geothermal fluid in the primary geothermal heat exchange device 21 is communicated with an inlet of the solar heat collection device 5 after passing through the evaporator 2 and the preheater 3 in sequence, and working fluid in the primary geothermal heat exchange device 21 is communicated with the power generation equipment after passing through the preheater 3 and the evaporator 2 in sequence. The arrangement of the evaporator 2 and the preheater 3 can realize the sufficient heat exchange between the working medium fluid and the geothermal fluid, thereby greatly improving the heat exchange efficiency. Based on the same concept, it is preferable that the secondary geothermal heat exchanging device 61 comprises an evaporator 6 and a preheater 7 which are communicated with each other, wherein the geothermal fluid flowing out of the solar heat collecting device 5 sequentially passes through the evaporator 6 and the preheater 7 of the secondary geothermal heat exchanging device 61, and the working fluid in the secondary geothermal heat exchanging device 61 sequentially passes through the preheater 7 and the evaporator 6 of the secondary geothermal heat exchanging device 61 and then is communicated with the power generating equipment.
Preferably, the primary geothermal fluid pipe outlet of the primary geothermal heat exchanger 21 is provided with a primary three-way valve 4, the geothermal fluid pipe outlet of the secondary geothermal heat exchanger 61 is provided with a secondary three-way valve 8, and the primary three-way valve 4 and the secondary three-way valve 8 are communicated with each other, so that the geothermal fluid can be circularly heated. Preferably, the working fluid three-way valve 17 is arranged at the inlet of the working fluid pipeline of the secondary geothermal heat exchanger 61, and the working fluid three-way valve 17 is communicated with the inlet of the working fluid pipeline of the primary geothermal heat exchanger 21, so that the working fluid becomes a closed circulation path, and the working fluid in the primary geothermal heat exchanger 21 and the working fluid in the secondary geothermal heat exchanger 61 are recycled. As shown in fig. 1, in order to realize the rapid condensation of the exhaust gas after the power generation of the gaseous working fluid, it is preferable that the working fluid of the primary geothermal heat exchanging device 21 passes through the turbine and the air cooling island corresponding thereto in sequence, and then is recycled for the next time. Based on the same concept, the working fluid of the second-level geothermal heat exchange device 61 is preferably recycled for the next time after sequentially passing through the corresponding turbine and the air cooling island.
Claims (10)
1. Photothermal enhancement type organic Rankine cycle geothermal power generation system comprises a primary geothermal heat exchange device (21), wherein the primary geothermal heat exchange device (21) comprises a geothermal fluid pipeline and a working medium fluid pipeline, and is characterized in that: the geothermal energy heat collection device comprises a solar heat collection device (5) and a secondary geothermal heat exchange device (61) provided with a geothermal fluid pipeline and a working medium fluid pipeline, wherein a geothermal fluid pipeline outlet of a primary geothermal heat exchange device (21) is communicated with an inlet of the solar heat collection device (5), and an outlet of the solar heat collection device (5) is communicated with a geothermal fluid pipeline inlet of the secondary geothermal heat exchange device (61).
2. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, wherein: the primary geothermal heat exchange device (21) comprises an evaporator (2) and a preheater (3) which are communicated with each other, wherein geothermal fluid in the primary geothermal heat exchange device (21) sequentially passes through the evaporator (2) and the preheater (3) and then is communicated with an inlet of the solar heat collection device (5), and working fluid in the primary geothermal heat exchange device (21) sequentially passes through the preheater (3) and the evaporator (2) and then is communicated with power generation equipment.
3. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, wherein: the secondary geothermal heat exchange device (61) comprises an evaporator (6) and a preheater (7) which are communicated with each other, wherein geothermal fluid flowing out of the solar heat collection device (5) sequentially passes through the evaporator (6) and the preheater (7) of the secondary geothermal heat exchange device (61), and working medium fluid in the secondary geothermal heat exchange device (61) sequentially passes through the preheater (7) and the evaporator (6) of the secondary geothermal heat exchange device (61) and then is communicated with power generation equipment.
4. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, 2 or 3, wherein: and a geothermal fluid flow outlet of the secondary geothermal heat exchange device (61) is provided with a reflux pump (9).
5. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 4, wherein: the pumping direction of the recharging pump (9) faces the direction of the recharging well (10).
6. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, 2 or 3, wherein: the geothermal fluid pipeline of the primary geothermal heat exchange device (21) is communicated with the geothermal production well (1).
7. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, 2, 3 or 5, wherein: the geothermal fluid pipeline outlet of the primary geothermal heat exchange device (21) is provided with a primary three-way valve (4), the geothermal fluid pipeline outlet of the secondary geothermal heat exchange device (61) is provided with a secondary three-way valve (8), and the primary three-way valve (4) and the secondary three-way valve (8) are communicated with each other.
8. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, 2, 3 or 5, wherein: and a working medium fluid three-way valve (17) is arranged at the inlet of the working medium fluid pipeline of the secondary geothermal heat exchange device (61), and the working medium fluid three-way valve (17) is communicated with the inlet of the working medium fluid pipeline of the primary geothermal heat exchange device (21).
9. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 1, 2, 3 or 5, wherein: working medium fluid of the primary geothermal heat exchange device (21) passes through the corresponding turbine and the corresponding air cooling island in sequence and is recycled for the next time.
10. The photothermal enhanced organic rankine cycle geothermal power generation system of claim 9, wherein: working medium fluid of the secondary geothermal heat exchange device (61) passes through the corresponding turbine and the air cooling island in sequence and then is recycled for the next time.
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| CN202221348637.6U CN217270640U (en) | 2022-05-31 | 2022-05-31 | Photo-thermal enhanced organic Rankine cycle geothermal power generation system |
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| CN202221348637.6U CN217270640U (en) | 2022-05-31 | 2022-05-31 | Photo-thermal enhanced organic Rankine cycle geothermal power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810521A (en) * | 2022-05-31 | 2022-07-29 | 中国电建集团成都勘测设计研究院有限公司 | Photothermal Enhanced Organic Rankine Cycle Geothermal Power Generation System |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810521A (en) * | 2022-05-31 | 2022-07-29 | 中国电建集团成都勘测设计研究院有限公司 | Photothermal Enhanced Organic Rankine Cycle Geothermal Power Generation System |
| CN114810521B (en) * | 2022-05-31 | 2024-11-22 | 中国电建集团成都勘测设计研究院有限公司 | Solar-thermal enhanced organic Rankine cycle geothermal power generation system |
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