Solar energy and terrestrial heat co-production power generation system

Abstract

The solar energy and terrestrial heat co-production power generation system comprises a solar device, the solar device comprises a heat collector and a heat storage water tank, and a heat exchange outlet of the heat storage water tank is connected with a heat exchange inlet of the heat storage water tank through a third pipeline; the generator set comprises a first turbine and a heater, an inlet of the first turbine is connected with the fourth pipeline, an outlet of the first turbine is communicated with an inlet of the fourth pipeline through a fifth pipeline and a sixth pipeline which are arranged in parallel, and the fifth pipeline is connected with the third pipeline through a first heat exchanger; the geothermal energy storage part comprises a production well and an injection well, geothermal water discharged by the production well can be introduced into the injection well through a seventh pipeline, and the seventh pipeline is connected with a sixth pipeline through a second heat exchanger so that the working medium in the sixth pipeline can be heated by the geothermal water in the seventh pipeline. Therefore, the solar energy and terrestrial heat co-production power generation system is convenient for power generation, low in energy consumption and small in influence on the environment.

Description

Technical Field

[0001] This invention relates to the field of geothermal energy storage technology, specifically to a solar and geothermal combined heat and power generation system. Background Technology

[0002] Among related technologies, geothermal energy storage technology utilizes porous underground media to store energy. This technology uses underground fluids as a carrier, selects underground spaces with good thermal insulation to store energy, and extracts the energy to the surface for utilization when necessary through wells. However, geothermal energy storage suffers from low utilization rates and environmental damage. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a combined solar and geothermal power generation system.

[0004] The solar and geothermal combined heat and power generation system of this invention includes:

[0005] A solar energy device, comprising a collector and a hot water storage tank, wherein the outlet of the collector is connected to the inlet of the hot water storage tank via a first pipe, the inlet of the collector is connected to the outlet of the hot water storage tank via a second pipe, and the heat exchange outlet of the hot water storage tank is connected to the heat exchange inlet of the hot water storage tank via a third pipe.

[0006] A generator set includes a first turbine and a heater. The first turbine can drive a generator connected to it to generate electricity. The inlet of the first turbine is connected to a fourth pipeline. The heater is located on the fourth pipeline. The outlet of the first turbine is connected to the inlet of the fourth pipeline through a fifth pipeline and a sixth pipeline arranged in parallel. The fifth pipeline is connected to the third pipeline through a first heat exchanger so that the working fluid in the third pipeline can heat the working fluid in the fifth pipeline.

[0007] The geothermal energy storage unit includes a production well and an injection well. The geothermal water discharged from the production well can be introduced into the injection well through a seventh pipeline. The seventh pipeline is connected to the sixth pipeline through a second heat exchanger so that the geothermal water in the seventh pipeline can heat the working fluid in the sixth pipeline.

[0008] Therefore, the solar and geothermal combined power generation system according to embodiments of the present invention is easy to generate electricity, has low energy consumption, and has little environmental impact.

[0009] In some embodiments, the geothermal energy storage unit further includes a separator, the inlet of which is connected to the outlet of the production well. The separator has a geothermal water outlet and a steam outlet. The geothermal water outlet is used to discharge geothermal water, and the steam outlet is used to discharge steam. The geothermal water outlet is connected to the inlet of the seventh pipeline.

[0010] In some embodiments, the generator set further includes a second turbine that can drive a generator connected thereto to generate electricity. The inlet of the second turbine is connected to the steam outlet through an eighth pipeline, and the outlet of the second turbine is connected to the inlet of the injection well through a ninth pipeline.

[0011] In some embodiments, a condenser is provided on the ninth pipeline.

[0012] In some embodiments, the geothermal water outlet is connected to the inlet of the injection well via a tenth pipeline, and the tenth pipeline is connected to the heating pipeline via a third heat exchanger so that the tenth pipeline can heat the heating water in the heating pipeline through the third heat exchanger.

[0013] In some embodiments, the tenth pipeline is provided with a heat absorption device located between the geothermal water outlet and the third heat exchanger, the heat absorption device being used to absorb heat from the geothermal water in the tenth pipeline.

[0014] In some embodiments, the temperature of the geothermal water in the tenth pipeline after the heat absorption device absorbs heat is greater than or equal to 60°C and less than or equal to 65°C.

[0015] In some embodiments, the heat-absorbing device is a heat generator or a fourth heat exchanger, wherein the fourth heat exchanger can utilize the thermal energy of the geothermal water in the tenth pipeline to provide heat to the geothermal drying room.

[0016] In some embodiments, both the fifth pipeline and the sixth pipeline are equipped with flow valves.

[0017] In some embodiments, both the fifth pipeline and the sixth pipeline are equipped with pump bodies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a solar and geothermal combined power generation system according to an embodiment of the present invention.

[0019] Figure label:

[0020] 1. Solar collector; 11. Hot water storage tank; 12. First pipeline; 13. Second pipeline; 14. Third pipeline;

[0021] 2. First turbine; 21. Heater; 22. Fourth pipeline; 23. Fifth pipeline; 24. Sixth pipeline; 25. First heat exchanger; 26. Second turbine; 27. Eighth pipeline; 28. Ninth pipeline; 29. ​​Condenser; 291. Pump body.

[0022] 31. Production well; 32. Injection well; 33. Seventh pipeline; 34. Second heat exchanger; 35. Separator; 351. Geothermal water outlet; 352. Steam outlet; 36. Tenth pipeline; 37. Third heat exchanger; 38. Heat absorption device; 39. Heating pipeline. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The following description, with reference to the accompanying drawings, describes an embodiment of the solar and geothermal combined power generation system of the present invention. For example... Figure 1 As shown, the solar and geothermal combined power generation system according to an embodiment of the present invention includes a solar energy device, a generator set, and a geothermal energy storage unit.

[0025] The solar energy device includes a collector 1 and a hot water storage tank 11. The outlet of the collector 1 is connected to the inlet of the hot water storage tank 11 via a first pipe 12, and the inlet of the collector 1 is connected to the outlet of the hot water storage tank 11 via a second pipe 13. The heat exchange outlet of the hot water storage tank 11 is connected to the heat exchange inlet of the hot water storage tank 11 via a third pipe 14. The collector 1 absorbs solar energy to heat the working fluid, and then passes the heated working fluid (water) into the hot water storage tank 11 for storage.

[0026] The generator set includes a first turbine 2 and a heater 21. The first turbine 2 drives a generator connected to it to generate electricity. The inlet of the first turbine 2 is connected to a fourth pipe 22, and the heater 21 is located on the fourth pipe 22. The outlet of the first turbine 2 is connected to the inlet of the fourth pipe 22 via a fifth pipe 23 and a sixth pipe 24 connected in parallel. The fifth pipe 23 is connected to a third pipe 14 via a first heat exchanger 25, so that the working fluid in the third pipe 14 can heat the working fluid in the fifth pipe 23. Thus, the heat energy converted from solar energy absorbed by the solar energy device can be used to preheat the working fluid in the fifth pipe 23 through the first heat exchanger 25. The heated working fluid in the fifth pipe 23 can then be fed into the fourth pipe 22, heated by the heater 21, and then fed into the first turbine 2 to generate electricity. For example, the heater 21 burns fuel to heat the water in the fourth pipe 22 to a steam state.

[0027] The geothermal energy storage unit includes a production well 31 and an injection well 32. Geothermal water discharged from the production well 31 is introduced into the injection well 32 via a seventh pipe 33. The seventh pipe 33 is connected to a sixth pipe 24 via a second heat exchanger 34, allowing the geothermal water in the seventh pipe 33 to heat the working fluid in the sixth pipe 24. This allows the geothermal energy stored in the production well 31 to preheat the working fluid in the sixth pipe 24 via the second heat exchanger 34. The heated working fluid in the sixth pipe 24 is then introduced into a fourth pipe 22, heated by a heater 21, and finally fed into a first turbine 2 to generate electricity.

[0028] In some embodiments, both the fifth pipe 23 and the sixth pipe 24 are equipped with flow valves, which can control the flow rate within each pipe. Thus, when the heat generated by either the solar energy device or the geothermal energy storage unit is low, the flow rate of the corresponding pipe in the fifth pipe 23 or the sixth pipe 24 can be reduced, flexibly adjusting the working fluid flowing into the fourth pipe 22. Both the fifth pipe 23 and the sixth pipe 24 are equipped with pump bodies 291 to facilitate the flow of the working fluid.

[0029] The generator set of the solar and geothermal cogeneration power generation system according to an embodiment of the present invention includes a fifth pipe 23 and a sixth pipe 24 connected in parallel to the inlet of the first turbine 2. Thus, the heat generated by the solar energy device and the geothermal energy from the geothermal storage unit can be used to heat the working fluid in the fifth pipe 23 and the sixth pipe 24 respectively, so that the working fluid is preheated before entering the heater 21, thereby reducing the energy consumption of the heater 21. Furthermore, the geothermal water in the seventh pipe 33, after heat exchange, can be reintroduced into the injection well 32, thereby reducing the impact on groundwater and the underground environment.

[0030] Therefore, the solar and geothermal combined power generation system according to embodiments of the present invention is easy to generate electricity, has low energy consumption, and has little environmental impact.

[0031] like Figure 1 As shown, in some embodiments, the geothermal energy storage unit further includes a separator 35. The inlet of the separator 35 is connected to the outlet of the production well 31, and the separator 35 can separate steam and water. The separator 35 has a geothermal water outlet 351 for discharging geothermal water and a steam outlet 352 for discharging steam. The geothermal water outlet 351 is connected to the inlet of the seventh pipeline 33.

[0032] In some embodiments, the generator set further includes a second turbine 26, which drives a connected generator to generate electricity. The inlet of the second turbine 26 is connected to a steam outlet 352 via an eighth pipe 27, and the outlet of the second turbine 26 is connected to the inlet of the injection well 32 via a ninth pipe 28. A condenser 29 is provided on the ninth pipe 28. Thus, steam discharged from the steam outlet 352 can be fed into the second turbine 26 to generate electricity, and the working fluid discharged from the second turbine 26 can be condensed by the condenser and then fed into the injection well 32.

[0033] like Figure 1 As shown, in some embodiments, the geothermal water outlet 351 is connected to the inlet of the injection well 32 via a tenth pipe 36. The tenth pipe 36 is connected to the heating pipe 39 via a third heat exchanger 37, so that the tenth pipe 36 can heat the heating water in the heating pipe 39 through the third heat exchanger 37. Therefore, the geothermal water discharged from the geothermal water outlet 351 can provide heat energy to the heating pipe 39, thereby reducing energy consumption. Furthermore, the geothermal water after heat exchange in the tenth pipe 36 can be reintroduced into the injection well 32.

[0034] In some embodiments, a heat absorption device 38 is provided on the tenth pipe 36 between the geothermal water outlet 351 and the third heat exchanger 37. The heat absorption device 38 is used to absorb heat from the geothermal water in the tenth pipe 36. Specifically, the temperature of the geothermal water in the tenth pipe 36 after the heat absorption device 38 absorbs heat is greater than or equal to 60°C and less than or equal to 65°C. This is so that the geothermal water in the tenth pipe 36 after the heat absorption device 38 absorbs heat can easily provide heat energy for geothermal water systems.

[0035] In some embodiments, the heat-absorbing device 38 is a thermoelectric generator or a fourth heat exchanger. Specifically, the heat-absorbing device 38 is a device that can utilize the geothermal heat energy within the tenth pipe 36. The heat-absorbing device 38 can be a thermoelectric generator that can generate electricity using the geothermal heat energy within the tenth pipe 36. Alternatively, the heat-absorbing device 38 can be a fourth heat exchanger that can utilize the geothermal heat energy within the tenth pipe 36 to provide heat to devices requiring heat, such as geothermal drying rooms.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A combined solar and geothermal power generation system, characterized in that, include: A solar energy device, comprising a collector and a hot water storage tank, wherein the outlet of the collector is connected to the inlet of the hot water storage tank via a first pipe, the inlet of the collector is connected to the outlet of the hot water storage tank via a second pipe, and the heat exchange outlet of the hot water storage tank is connected to the heat exchange inlet of the hot water storage tank via a third pipe. A generator set includes a first turbine and a heater. The first turbine can drive a generator connected to it to generate electricity. The inlet of the first turbine is connected to a fourth pipeline. The heater is located on the fourth pipeline. The outlet of the first turbine is connected to the inlet of the fourth pipeline through a fifth pipeline and a sixth pipeline arranged in parallel. The fifth pipeline is connected to the third pipeline through a first heat exchanger so that the working fluid in the third pipeline can heat the working fluid in the fifth pipeline. The geothermal energy storage unit includes a production well and an injection well. The geothermal water discharged from the production well can be introduced into the injection well through a seventh pipeline. The seventh pipeline is connected to the sixth pipeline through a second heat exchanger so that the geothermal water in the seventh pipeline can heat the working fluid in the sixth pipeline.

2. The solar and geothermal combined heat and power generation system according to claim 1, characterized in that, The geothermal energy storage unit also includes a separator, the inlet of which is connected to the outlet of the production well. The separator has a geothermal water outlet and a steam outlet. The geothermal water outlet is used to discharge geothermal water, and the steam outlet is used to discharge steam. The geothermal water outlet is connected to the inlet of the seventh pipeline.

3. The solar and geothermal combined heat and power generation system according to claim 2, characterized in that, The generator set also includes a second turbine, which can drive a generator connected to it to generate electricity. The inlet of the second turbine is connected to the steam outlet through an eighth pipeline, and the outlet of the second turbine is connected to the inlet of the injection well through a ninth pipeline.

4. The solar and geothermal combined heat and power generation system according to claim 3, characterized in that, A condenser is installed on the ninth pipeline.

5. The solar and geothermal combined heat and power generation system according to claim 2, characterized in that, The geothermal water outlet is connected to the inlet of the injection well via a tenth pipeline, and the tenth pipeline is connected to the heating pipeline via a third heat exchanger so that the tenth pipeline can heat the heating water in the heating pipeline through the third heat exchanger.

6. The solar and geothermal combined heat and power generation system according to claim 5, characterized in that, The tenth pipeline is equipped with a heat absorption device located between the geothermal water outlet and the third heat exchanger. The heat absorption device is used to absorb the heat from the geothermal water in the tenth pipeline.

7. The solar and geothermal combined heat and power generation system according to claim 6, characterized in that, The temperature of the geothermal water in the tenth pipeline after the heat absorption device absorbs heat is greater than or equal to 60°C and less than or equal to 65°C.

8. The solar and geothermal combined heat and power generation system according to claim 6, characterized in that, The heat absorption device is a heat generator or a fourth heat exchanger.

9. The solar and geothermal combined heat and power generation system according to claim 1, characterized in that, Both the fifth and sixth pipelines are equipped with flow valves.

10. The solar and geothermal combined heat and power generation system according to claim 1, characterized in that, Pump bodies are installed on both the fifth and sixth pipelines.

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