CN217685926U - Energy storage power generation system based on solar energy and geothermal energy coupling utilization - Google Patents
Energy storage power generation system based on solar energy and geothermal energy coupling utilization Download PDFInfo
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- CN217685926U CN217685926U CN202221476117.3U CN202221476117U CN217685926U CN 217685926 U CN217685926 U CN 217685926U CN 202221476117 U CN202221476117 U CN 202221476117U CN 217685926 U CN217685926 U CN 217685926U
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model discloses an energy storage power generation system based on solar energy and geothermal energy coupling utilization, which comprises a solar energy heat collection system, a geothermal energy development system, a heat storage system and an ORC power generation system; the solar heat collecting system comprises a solar heat collector, a cold medium storage tank and a cold circulating pump; the geothermal energy development system comprises a geothermal source acquisition device, a geothermal circulating pump, a first heat exchanger, a second heat exchanger and a compressor; the heat storage system comprises a heat medium storage tank and a heat medium circulating pump, and the outlet end of the solar heat collector and the heat outlet of the second heat exchanger are both connected with the heat medium storage tank; the ORC power generation system comprises a third heat exchanger, a turbine generator set, a fourth heat exchanger and a working medium pump; and the heat inlet of the third heat exchanger is connected with the outlet of the heat medium storage tank. The system reduces consumption of fossil energy and pollutant emission caused by consumption of the fossil energy by developing and utilizing shallow geothermal energy and solar energy, and can bring certain economic benefit.
Description
Technical Field
The utility model relates to an energy utilization technical field, in particular to energy storage power generation system based on solar energy and geothermal energy coupling utilization.
Background
With the rapid development of social economy and the great increase of population, the demand of human beings on energy is continuously increased, and meanwhile, the consumption of fossil energy brings huge damage to the environment. Due to day and night alternation and barriers in the prior art, the power grid cannot provide flexible power supply according to the needs of users, and a large amount of electric energy is wasted. Therefore, relevant policies and a great deal of technical research are carried out on peak load shifting carried out on the power grid, such as: by taking the peak-valley electricity price, the enterprises hope to be conditioned to increase the utilization amount of the valley electricity and reduce the waste of the electricity; for example, the research and development of an energy storage system can store the valley electricity, and the use can be carried out in the daytime. Meanwhile, in order to reduce the pollution problem caused by fossil energy, extensive research and implementation have been conducted on the development of renewable energy.
Although peak-to-valley electricity prices are proposed, this does not provide a good improvement in the case of waste of electric energy due to various conditions. Many scholars propose energy storage systems of different schemes in order to reduce electric energy waste, mainly have: compressed air energy storage, pumped storage, battery power storage and the like. Compressed air energy storage is greatly limited in its application because of the high air pressure stored and the need for further heat compensation during power generation. Pumped storage requires natural geographical location differences that are not applicable to plains. While battery storage requires further evaluation due to cost and safety issues.
The energy storage system developed aiming at peak clipping and valley filling of the power grid can reduce the consumption of fossil energy to a certain extent, but the development of clean renewable energy is an important way for solving the pollution caused by the fossil energy. The development and utilization of solar energy and geothermal energy are mainly power generation and heat utilization. In the solar power generation, the solar cell panel power generation and the solar heat collection power generation are mainly carried out. However, since solar energy changes obviously with weather, stable electric energy output cannot be provided, and new difficulties are increased for grid-connected use.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide an energy storage power generation system based on solar energy and geothermal energy coupling utilization, this system is through utilizing shallow geothermal energy and solar energy, has reduced the pollutant emission that fossil energy's consumption and fossil energy consumption brought, can also bring certain economic benefits simultaneously.
In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a following technical scheme realizes:
an energy storage power generation system based on solar energy and geothermal energy coupling utilization comprises a solar heat collection system, a geothermal energy development system, a heat storage system and an ORC power generation system;
the solar heat collecting system comprises a solar heat collector, a cold medium storage tank and a cold circulating pump; the inlet end of the solar heat collector is connected with the outlet of the cold medium storage tank through a cold circulating pump;
the geothermal energy development system comprises a geothermal source acquisition device, a geothermal circulating pump, a first heat exchanger, a second heat exchanger and a compressor; a circulation loop is formed among the geothermal source collecting device, the heat circulating pump and the first heat exchanger; the first heat exchanger, the compressor and the second heat exchanger are connected in sequence to form a circulation loop;
the heat storage system comprises a heat medium storage tank and a heat medium circulating pump, the outlet end of the solar heat collector and the heat outlet of the second heat exchanger are both connected with the heat medium storage tank, and the heat medium storage tank is connected with the ORC power generation system through the heat medium circulating pump;
the ORC power generation system comprises a third heat exchanger, a turbine generator set, a fourth heat exchanger and a working medium pump which are sequentially connected to form a circulation loop; the heat inlet of the third heat exchanger is connected with a heat medium storage tank through a heat medium circulating pump of the heat storage system; and a cold outlet of the third heat exchanger is connected with the cold medium storage tank.
As a further improvement of the above technical solution of the present invention, the energy storage power generation system further includes a first heat supply system, the first heat supply system includes a fifth heat exchanger, a heat consumer and a first heat supply circulating pump, which are sequentially connected to form a circulating loop; a hot inlet of the fifth heat exchanger is connected with a cold outlet of the third heat exchanger; and a cold outlet of the fifth heat exchanger is connected with the cold medium storage tank.
As a further improvement of the above technical solution of the present invention, the energy storage power generation system further includes a second heat supply system, and the second heat supply system includes a second heat supply circulation pump and a heat consumer; and the fourth heat exchanger, the heat user and the second heat supply circulating pump are sequentially connected to form a circulating loop.
As the utility model discloses above-mentioned technical scheme's further improvement, cold medium holding vessel pass through the cold medium circulating pump with the cold access connection of second heat exchanger.
As a further improvement of the above technical solution of the present invention, an expansion valve is further connected to the circulation pipeline between the second heat exchanger and the first heat exchanger.
As a further improvement of the above technical solution of the present invention, the number of the heat medium storage tanks is two, and one of the heat medium storage tanks is a spare tank.
As a further improvement of the above technical solution of the present invention, the cold medium stored in the cold medium storage tank is cold water.
As the further improvement of the above technical scheme of the utility model, the geothermal source that geothermal source collection device gathered is shallow geothermal water.
As the utility model discloses above-mentioned technical scheme's further improvement, be equipped with the valve on the pipeline between heat medium holding vessel and the ORC power generation system.
As the utility model discloses above-mentioned technical scheme's further improvement, the geothermal circulating pump adopts millet electric drive.
The utility model has the advantages that:
the energy storage power generation system can utilize valley electricity to drive a geothermal circulating pump to develop shallow geothermal energy at night and in the daytime at the low peak of electricity consumption, utilize the geothermal energy to heat a cold medium, and store a thermal medium with higher temperature level in a thermal medium storage tank; solar energy is collected by a solar heat collector during the daytime, the cold medium is heated by the solar energy, and the heated heat medium is stored in a heat medium storage tank. The ORC power generation system generates power by using the heat of the thermal medium stored in the thermal medium storage tank; the system realizes stable electric energy output by collecting, storing and recycling solar energy and optimizing calculation, thereby realizing grid connection of solar power generation.
The energy storage power generation system utilizes valley electricity in the low peak period of electricity consumption at night and in the daytime to develop and store shallow geothermal energy, so that peak clipping and valley filling of a power grid can be realized.
The energy storage power generation system has the following advantages:
(1) The peak clipping and valley filling of the power grid are realized, and the peak regulation frequency of the power grid and the loss caused by the peak regulation frequency are reduced;
(2) The stable output of the electric energy of the solar energy is realized, so that the large-scale grid connection of the solar power generation is promoted;
(3) The reduction of fossil energy consumption and the generation of pollutants are realized through the development of solar energy and geothermal energy.
Drawings
Fig. 1 is a schematic diagram of the energy storage and power generation system based on the coupling utilization of solar energy and geothermal energy.
Detailed Description
The following description of the preferred embodiments of the present invention will be provided with reference to the accompanying drawings, so that the advantages and features of the present invention can be easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.
A preferred embodiment of the energy storage and generation system based on coupled utilization of solar energy and geothermal energy as shown in fig. 1; the energy storage power generation system comprises a solar heat collection system 1, a geothermal energy development system 2, a heat storage system 3 and an ORC power generation system 4.
The solar heat collecting system 1 comprises a solar heat collector 11, a cold medium storage tank 12 and a cold circulating pump 13; in the present embodiment, the solar collector 11 is a trough collector; the cold medium stored in the cold medium storage tank 12 is cold water; the inlet end of the solar collector 11 is connected to the outlet of the cold medium storage tank 12 via a cold circulation pump 13.
The geothermal energy development system 2 includes a geothermal energy source collecting device 21, a geothermal circulating pump 22, a first heat exchanger 23, a second heat exchanger 24, a compressor 25, and an expansion valve 26. The geothermal source collecting apparatus 21 may be a geothermal well or the like. In the present embodiment, the geothermal source collected by the geothermal source collection device 21 is shallow geothermal water. A circulation loop is formed among the geothermal source collecting device 21, the geothermal circulating pump 22 and the first heat exchanger 23; the first heat exchanger 23, the compressor 25, the second heat exchanger 24 and the expansion valve 26 are connected in sequence through pipelines to form a circulation loop; specifically, the geothermal source collecting device 21 is connected with a hot inlet of a first heat exchanger 23 through a geothermal circulating pump 22, and a cold outlet of the first heat exchanger 23 is connected with the geothermal source collecting device 21; the hot outlet of the first heat exchanger 23 is connected with a compressor 25, the outlet of the compressor 25 is connected with the hot inlet of the second heat exchanger 24, the cold outlet of the second heat exchanger 24 is connected with an expansion valve 26, and the expansion valve 26 is connected with the cold inlet of the first heat exchanger 23; the cold medium storage tank 12 is also connected to the cold inlet of the second heat exchanger 24 by means of a cold medium circulation pump 27. The geothermal circulating pump 22 is driven by valley current.
The heat storage system 3 comprises a heat medium storage tank 31 and a heat medium circulating pump 32, the outlet end of the solar heat collector 11 and the heat outlet of the second heat exchanger 24 are both connected with the heat medium storage tank 31, and the heat medium storage tank 31 is connected with the ORC power generation system 4 through the heat medium circulating pump 32. In this heat storage system 3, the number of the heat medium storage tanks 31 is two, one of which is a backup tank; the two heat medium storage tanks 31 are controlled by a switching valve 33. Generally, the spare tank is used for storing the excess heat medium exceeding the design level under special conditions. When in use, the heat medium in the spare tank can be selected for use first. The surfaces of both the thermal medium storage tanks 31 are provided with insulating layers to minimize heat loss. The two heat medium storage tanks 31 may be designed with differentiated sizes and heat-insulating measures to reduce investment costs. The two heat medium storage tanks 31 are connected to each other by a pipe, and two valves 34 for controlling the two heat medium storage tanks are provided on the pipe. The connection pipe between the heat medium storage tank 31 and the ORC power generation system 4 is connected in parallel to the pipe between the two heat medium storage tanks 31. The valve 34 can control the flow direction and the flow rate of the thermal medium.
The ORC power generation system 4 includes a third heat exchanger 41, a turbine generator set, a fourth heat exchanger 42, and a working medium pump 43, which are connected in sequence to form a circulation loop. The turbine generator set includes a turbine 44 and a generator 45. The heat inlet of the third heat exchanger 41 is connected with the outlet of the heat medium storage tank 31 through the heat medium circulating pump 32 of the heat storage system 3; the cold outlet of the third heat exchanger 41 is connected with the cold medium storage tank 12; the cold inlet of the third heat exchanger 41 is connected with the cold outlet of the fourth heat exchanger 42 through a working medium pump 43; the hot outlet of the third heat exchanger 41 is connected to a turbine generator set, the outlet of which is connected to the hot inlet of the fourth heat exchanger 42.
The energy storage and power generation system further comprises a first heat supply system 5, wherein the first heat supply system 5 comprises a fifth heat exchanger 51, a heat consumer and a first heat supply circulating pump 52 which are sequentially connected to form a circulating loop. The fifth heat exchanger 51 is connected between the third heat exchanger 41 and the refrigerant storage tank 12 through a pipe; specifically, the hot inlet of the fifth heat exchanger 51 is connected to the cold outlet of the third heat exchanger 41; the cold outlet of the fifth heat exchanger 51 is connected to the cold medium storage tank 12. The hot outlet of the fifth heat exchanger 51 is connected to the heating apparatus of the heat consumer, and the outlet of the heating apparatus of the heat consumer is connected to the cold inlet of the fifth heat exchanger 51 through the first heating circulation pump 52.
The energy storage and power generation system further comprises a second heat supply system 6, wherein the second heat supply system 6 comprises a second heat supply circulating pump 61 and a heat consumer; the fourth heat exchanger 42, the heat consumer and the second heat supply circulation pump 61 are connected in sequence to form a circulation loop. Specifically, the hot outlet of the fourth heat exchanger 42 is connected to the heating device of the heat consumer, and the outlet of the heating device of the heat consumer is connected to the cold inlet of the fourth heat exchanger 42 through the second heating circulation pump 61.
Principle of operation
A solar heat collector 11 in the solar heat collecting system 1 collects solar energy in the daytime and converts the solar energy into heat energy, and a cold circulating pump 13 drives water in a cold medium storage tank 12 to flow through the solar heat collector 11 and take away the heat energy converted by the solar energy; the hot water enters the thermal medium storage tank 31 or the spare tank. According to the temperature measuring device, the temperature level of water at the outlet of the solar heat collector 11 is ensured by adjusting the frequency of the cold circulating pump 13 and further adjusting the cold water flow.
The geothermal energy development system 2 develops shallow geothermal energy through a geothermal circulating pump 22; during nighttime and daytime low-peak electricity consumption periods, the geothermal energy with a low temperature level is converted into the thermal energy with a high temperature level by driving the geothermal circulating pump 22 with valley electricity, and the thermal energy is stored in the thermal medium storage tank 31. Specifically, the geothermal circulating pump 22 drives water coming out from the shallow underground layer to enter the first heat exchanger 23 to provide heat for evaporation of a circulating working medium in the first heat exchanger 23, the circulating working medium evaporated to saturated gas enters the compressor 25 to be compressed to a high-temperature high-pressure state, and exchanges heat with cold water provided by the cold medium storage tank 12 in the second heat exchanger 24 to heat the cold water to the high-temperature state and store the cold water in the hot medium storage tank 31; the cooled circulating working medium is cooled and depressurized by the expansion valve 26 and then enters the first heat exchanger 23 for the next circulation.
Hot water in the heat medium storage tank 31 enters the third heat exchanger 41 through the heat medium circulating pump 32 to provide heat for the evaporation of the organic working medium, and the organic working medium evaporated to a saturated gas state enters the turbine 44 to expand and do work to drive the generator 45 to generate electricity; the organic medium flowing out of the turbine 44 enters the fourth heat exchanger 42 for condensation, and the released heat can supply heat to a heat user. The condensed organic working medium enters the third heat exchanger 41 again through the working medium pump 43 to be circulated in the next step.
The hot water as the heat source enters the first heat supply system 5 after the heat exchange in the third heat exchanger 41 is finished, and further heat exchange is performed in the fifth heat exchanger 51, thereby supplying heat to the hot user. The circulating water for supplying heat to the heat consumer is driven to circulate by the first heat-supplying circulating pump 52. The cold water flowing out through the cold outlet of the fifth heat exchanger 51 finally flows into the cold medium storage tank 12.
In addition, the organic working medium in the ORC power generation subsystem 4 exchanges heat in the fourth heat exchanger 42, and heat released by condensation of the organic working medium can also supply heat to a heat user; the circulating water for supplying heat to the heat consumers is driven to circulate by the second heat-supplying circulating pump 61.
The whole system can be considered globally according to the amount of valley electricity and the abundance of local solar energy in the design stage, the sizes and heat preservation measures of the cold medium storage tank, the heat medium storage tank and the standby heat medium storage tank are reasonably planned, and meanwhile, the water flow is controlled by the adjusting valve, so that the stable operation and stable output of the ORC power generation system are ensured.
The above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification and the attached drawings, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.
Claims (10)
1. An energy storage power generation system based on solar energy and geothermal energy coupling utilization, its characterized in that: the system comprises a solar heat collection system, a geothermal energy development system, a heat storage system and an ORC power generation system;
the solar heat collecting system comprises a solar heat collector, a cold medium storage tank and a cold circulating pump; the inlet end of the solar heat collector is connected with the outlet of the cold medium storage tank through a cold circulating pump;
the geothermal energy development system comprises a geothermal source acquisition device, a geothermal circulating pump, a first heat exchanger, a second heat exchanger and a compressor; a circulation loop is formed among the geothermal source collecting device, the heat circulating pump and the first heat exchanger; the first heat exchanger, the compressor and the second heat exchanger are connected in sequence to form a circulation loop;
the heat storage system comprises a heat medium storage tank and a heat medium circulating pump, the outlet end of the solar heat collector and the heat outlet of the second heat exchanger are both connected with the heat medium storage tank, and the heat medium storage tank is connected with the ORC power generation system through the heat medium circulating pump;
the ORC power generation system comprises a third heat exchanger, a turbine generator set, a fourth heat exchanger and a working medium pump which are sequentially connected to form a circulation loop; a heat inlet of the third heat exchanger is connected with a heat medium circulating pump of the heat storage system; and a cold outlet of the third heat exchanger is connected with the cold medium storage tank.
2. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 1, wherein: the first heat supply system comprises a fifth heat exchanger, a heat consumer and a first heat supply circulating pump which are sequentially connected to form a circulating loop; a hot inlet of the fifth heat exchanger is connected with a cold outlet of the third heat exchanger; and a cold outlet of the fifth heat exchanger is connected with the cold medium storage tank.
3. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 2, wherein: the system also comprises a second heat supply system, wherein the second heat supply system comprises a second heat supply circulating pump and a heat user; and the fourth heat exchanger, the heat user and the second heat supply circulating pump are sequentially connected to form a circulating loop.
4. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 1, wherein: the cold medium storage tank is connected with a cold inlet of the second heat exchanger through a cold medium circulating pump.
5. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 1, wherein: and an expansion valve is connected on the circulating pipeline between the second heat exchanger and the first heat exchanger.
6. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 1, wherein: the number of the heat medium storage tanks is two, and one of the heat medium storage tanks is a standby tank.
7. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 1, wherein: the cold medium stored in the cold medium storage tank is cold water.
8. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy according to claim 1, wherein: the geothermal source collected by the geothermal source collecting device is shallow geothermal water.
9. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy as claimed in claim 1, wherein: and a valve is arranged on a pipeline between the heat medium storage tank and the ORC power generation system.
10. An energy storage and power generation system based on coupled utilization of solar energy and geothermal energy as claimed in claim 1, wherein: the geothermal circulating pump is driven by valley current.
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| CN202221476117.3U CN217685926U (en) | 2022-06-14 | 2022-06-14 | Energy storage power generation system based on solar energy and geothermal energy coupling utilization |
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| CN202221476117.3U CN217685926U (en) | 2022-06-14 | 2022-06-14 | Energy storage power generation system based on solar energy and geothermal energy coupling utilization |
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