Energy utilization system and device

Abstract

The invention relates to an energy utilization system and device, the system comprises a heat supply subsystem, a power generation subsystem, a solar energy unit and a terrestrial heat unit, the terrestrial heat unit is in coupling connection with the heat supply subsystem and the power generation subsystem, and the solar energy unit is in coupling connection with the heat supply subsystem and the power generation subsystem; the geothermal unit is used for obtaining geothermal energy through geothermal fluid, and the geothermal fluid is fluid providing the geothermal energy; the solar unit is used for obtaining solar energy through solar thermal fluid, and the solar thermal fluid is fluid providing the solar energy; the heat supply subsystem is used for supplying heat through the geothermal fluid and / or the solar thermal fluid; and the power generation subsystem is used for generating power through the geothermal fluid and / or the solar thermal fluid.

Description

Technical Field

[0001] The present disclosure relates to the technical field of geothermal power generation and thermal energy utilization, and in particular, to an energy utilization system and device. Background Art

[0002] Geothermal energy is the heat carried by rocks or hot fluids that can be developed within a certain distance (<10km) from the surface under current technical and economic conditions. As a non-fossil energy source, geothermal energy can be used directly or in the power generation process. The principle is to extract high-temperature geothermal fluids (liquid or steam) to the ground through mining wells, and then convert them into high-temperature and high-pressure steam in various ways to drive the steam turbine to work, thereby driving the engine to generate electricity. The utilization process is clean and low-carbon.

[0003] In the related technologies, when using geothermal energy for power generation, most of the heat is usually wasted, resulting in low efficiency in thermal energy utilization. In addition, due to the common shortcomings of small geothermal fluid flow and insufficient temperature in the development and utilization of most geothermal fields, the overall scale of geothermal power generation and its heating utilization is relatively low, resulting in the problem of being unable to meet actual needs. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides an energy utilization system and device.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an energy utilization system, the system comprising a heating subsystem, a power generation subsystem, a solar energy unit and a geothermal unit, the geothermal unit being coupled to the heating subsystem and the power generation subsystem respectively, the solar energy unit being coupled to the heating subsystem and the power generation subsystem respectively; The geothermal unit is used to obtain geothermal energy through geothermal fluid, and the geothermal fluid is a fluid that provides the geothermal energy; The solar energy unit is used to obtain solar energy through a solar thermal fluid, wherein the solar thermal fluid is a fluid that provides the solar energy; The heating subsystem is used to provide heating through the geothermal fluid and / or the solar thermal fluid; The power generation subsystem is used to generate electricity using the geothermal fluid and / or the solar thermal fluid.

[0006] Optionally, the heating subsystem is connected to the power generation subsystem; The power generation subsystem is used to transport the geothermal fluid and / or the solar thermal fluid used for power generation to the heat supply subsystem; The heat supply subsystem is used to receive the geothermal fluid and / or the solar thermal fluid delivered by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity.

[0007] Optionally, the system further comprises a first valve and a second valve, the geothermal unit is coupled to the heating subsystem and the power generation subsystem respectively through the first valve, and the solar unit is coupled to the heating subsystem and the power generation subsystem respectively through the second valve; The first valve is used to open the passage between the geothermal unit and the heating subsystem, and / or to open the passage between the geothermal unit and the power generation subsystem; The second valve is used to open the passage between the solar unit and the heating subsystem, and / or to open the passage between the solar unit and the power generation subsystem.

[0008] Optionally, the heating subsystem includes a first heating subsystem and a second heating subsystem, the first heating subsystem is connected to the geothermal unit through the first valve; the second heating subsystem is connected to the solar energy unit through the second valve; The first heating subsystem is used to provide heat through the geothermal fluid; The second heating subsystem is used for providing heat through the solar thermal fluid.

[0009] Optionally, the power generation subsystem is used to transport the geothermal fluid used for power generation to the first heat supply subsystem, and / or to transport the solar thermal fluid used for power generation to the second heat supply subsystem; The first heat supply subsystem is used to receive the geothermal fluid delivered by the power generation subsystem to obtain the residual heat remaining after the power generation subsystem generates electricity; The second heat supply subsystem is used to receive the solar thermal fluid delivered by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity.

[0010] Optionally, the power generation subsystem includes a multi-stage power generation cycle.

[0011] Optionally, the first heating subsystem includes a first heat exchanger and a first heat utilization module for performing heat cycle exchange with the first heat exchanger; the first heat exchanger is connected to the geothermal unit; The first heat exchanger is used to receive the geothermal fluid delivered by the geothermal unit and perform heat cycle exchange with the first heat utilization module through the geothermal fluid; The first heat utilization module is used to obtain heat from the geothermal fluid through heat cycle exchange.

[0012] Optionally, the first heat exchanger is also connected to the power generation subsystem; The power generation subsystem is used to transport the geothermal fluid used for power generation to the first heat exchanger; The first heat exchanger is also used to receive the geothermal fluid transported by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity; and to perform heat cycle exchange with the first heat utilization module through the geothermal fluid, so that the first heat utilization module can obtain the waste heat remaining after the power generation subsystem generates electricity.

[0013] Optionally, the second heat supply subsystem includes a second heat exchanger and a second heat utilization module for performing heat cycle exchange with the second heat exchanger; the second heat exchanger is connected to the solar energy unit; The second heat exchanger is used to receive the solar thermal fluid delivered by the solar unit and perform heat cycle exchange with the second heat utilization module through the solar thermal fluid; The second heat utilization module is used to obtain heat from the solar fluid through heat cycle exchange.

[0014] Optionally, the second heat exchanger is also connected to the power generation subsystem; The power generation subsystem is used to deliver the solar thermal fluid used for power generation to the second heat exchanger; The second heat exchanger is also used to receive the solar thermal fluid delivered by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity; and to perform heat cycle exchange with the second heat utilization module through the solar thermal fluid, so that the second heat utilization module can obtain the waste heat remaining after the power generation subsystem generates electricity.

[0015] According to a second aspect of an embodiment of the present disclosure, an energy utilization device is provided, wherein the energy utilization device comprises the energy utilization system described in any one of the first aspects of the embodiments of the present disclosure.

[0016] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: The energy utilization system provided by the above technical solution includes a heating subsystem, a power generation subsystem, a solar unit and a geothermal unit. The geothermal unit is coupled to the heating subsystem and the power generation subsystem respectively, and the solar unit is coupled to the heating subsystem and the power generation subsystem respectively; the geothermal unit is used to obtain geothermal energy through geothermal fluid, and the geothermal fluid is a fluid that provides the geothermal energy; the solar unit is used to obtain solar energy through solar thermal fluid, and the solar thermal fluid is a fluid that provides the solar energy; the heating subsystem is used to provide heating through the geothermal fluid and / or the solar thermal fluid; the power generation subsystem is used to generate electricity through the geothermal fluid and / or the solar thermal fluid. In this way, by setting up solar energy units and geothermal units, geothermal energy can be coupled with solar energy for utilization, thereby increasing the power generation and heating scale of the system and realizing larger-scale utilization of geothermal energy. In addition, by setting up heating subsystems and power generation subsystems, geothermal fluids and / or solar thermal fluids can be utilized separately and in a cascade manner, thereby satisfying the heating system's demand for high-grade heat sources and improving the overall efficiency of the entire energy utilization system.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 It is a block diagram of an energy utilization system according to an exemplary embodiment.

[0019] Figure 2 is a block diagram of another energy utilization system according to an exemplary embodiment.

[0020] Figure 3 is a block diagram of another energy utilization system according to an exemplary embodiment.

[0021] Figure 4 is a block diagram of another energy utilization system according to an exemplary embodiment.

[0022] Figure 5 It is a specific logic diagram of fluid flow according to an exemplary embodiment.

[0023] Figure 6 is a block diagram of an energy utilization device 600 according to an exemplary embodiment. DETAILED DESCRIPTION

[0024] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0025] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0026] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0027] Before introducing the specific implementation methods of the present disclosure in detail, the application scenarios of the present disclosure are first described. The present disclosure can be applied to scenarios where geothermal energy is used to generate electricity and provide heat. At present, geothermal energy is the heat carried by rocks or thermal fluids that can be developed within a certain distance (<10km) from the surface of the earth under current technical and economic conditions. As a non-fossil energy source, geothermal energy can be directly utilized or used in the power generation process. The principle is to extract high-temperature geothermal fluids (liquid or steam) to the ground through mining wells, and then convert them into high-temperature and high-pressure steam through various methods to drive the steam turbine to do work, thereby driving the engine to generate electricity, and its utilization process is clean and low-carbon.

[0028] In related technologies, using geothermal energy to generate electricity can usually be done in the following ways: Method 1: Geothermal fluids can be indirectly used to generate electricity. In systems that do not directly use geothermal fluids for power generation, geothermal fluids are usually reinjected into the ground through reinjection wells after heat exchange with circulating power generation fluids. However, this part of tail water usually still has a relatively high temperature (can reach 70-80°C or even higher). Direct reinjection will cause a waste of geothermal energy, resulting in poor economic performance of geothermal energy development projects and low thermal energy utilization efficiency.

[0029] Method 2: Directly utilize the high-temperature and high-pressure steam generated by geothermal fluid for circulating power generation. However, due to the common shortcomings of small geothermal fluid flow and insufficient temperature in the development and utilization of most geothermal fields, the overall scale of geothermal power generation and its heating utilization is relatively low, making it insufficient to meet actual needs.

[0030] In order to overcome the technical problems existing in the above-mentioned related technologies, the present disclosure provides an energy utilization system and device. The energy utilization system provided by the above-mentioned technical solution includes a heating subsystem, a power generation subsystem, a solar unit and a geothermal unit. The geothermal unit is coupled to the heating subsystem and the power generation subsystem respectively, and the solar unit is coupled to the heating subsystem and the power generation subsystem respectively; the geothermal unit is used to obtain geothermal energy through geothermal fluid, and the geothermal fluid is a fluid that provides the geothermal energy; the solar unit is used to obtain solar energy through solar thermal fluid, and the solar thermal fluid is a fluid that provides the solar energy; the heating subsystem is used to provide heating through the geothermal fluid and / or the solar thermal fluid; the power generation subsystem is used to generate electricity through the geothermal fluid and / or the solar thermal fluid. In this way, by setting up solar energy units and geothermal units, geothermal energy can be coupled with solar energy for utilization, thereby increasing the power generation and heating scale of the system and realizing larger-scale utilization of geothermal energy. In addition, by setting up heating subsystems and power generation subsystems, geothermal fluids and / or solar thermal fluids can be utilized separately and in a cascade manner, which can not only meet the heating system's demand for high-grade heat sources, but also improve the overall efficiency of the entire energy utilization system.

[0031] The present disclosure is described below in conjunction with specific embodiments.

[0032] Figure 1 is a block diagram of an energy utilization system 100 according to an exemplary embodiment. Figure 1 As shown, the system includes a heating subsystem 101 , a power generation subsystem 102 , a solar energy unit 103 and a geothermal unit 104 .

[0033] The geothermal unit 104 is coupled to the heating subsystem 101 and the power generation subsystem 102 respectively, and the solar energy unit 103 is coupled to the heating subsystem 101 and the power generation subsystem 102 respectively.

[0034] In some embodiments, the geothermal unit 104 can be used to obtain geothermal energy through geothermal fluid; and the solar unit 103 can be used to obtain solar energy through solar thermal fluid.

[0035] The geothermal fluid is a fluid that provides geothermal energy; the solar thermal fluid is a fluid that provides solar energy.

[0036] Optionally, the geothermal unit 104 can be used to obtain geothermal energy through geothermal fluid. For example, in practical applications, geothermal production wells can be used to obtain various geothermal fluids stored underground and having a temperature higher than normal. The geothermal fluid is a fluid that provides geothermal energy, and is often mainly composed of underground hot water and geothermal steam. And the solar unit 103 can be used to obtain solar energy through solar thermal fluid. For example, in practical applications, solar energy can be obtained through a heat-conducting medium in a solar collector, and the heat-conducting medium can be an organic medium.

[0037] In some embodiments, the heating subsystem 101 can be used to provide heating through the geothermal fluid and / or the solar thermal fluid; and the power generation subsystem 102 can be used to generate electricity through the geothermal fluid and / or the solar thermal fluid.

[0038] In this embodiment, the heating subsystem 101 can utilize the geothermal fluid alone, or the solar thermal fluid alone for heating, or can utilize the geothermal fluid and the solar thermal fluid simultaneously for heating. Similarly, the power generation subsystem 102 can utilize the geothermal fluid alone, or the solar thermal fluid alone for power generation, or can utilize the geothermal fluid and the solar thermal fluid simultaneously for power generation.

[0039] For example, when the heating subsystem 101 uses the geothermal fluid alone for heating, the connection device between the solar unit 103 and the heating subsystem 101 can be closed, so that the solar unit 103 and the heating subsystem 101 are in a disconnected state, or the solar unit 103 can be directly closed so that the solar unit 103 cannot obtain solar energy through the solar thermal fluid.

[0040] When the heating subsystem 101 solely utilizes solar thermal fluid for heating, the connection device between the geothermal unit 104 and the heating subsystem 101 can be closed, so that the geothermal unit 104 and the heating subsystem 101 are in a disconnected state, or the geothermal unit 104 can be directly closed, so that the geothermal energy unit cannot obtain geothermal energy through the geothermal fluid.

[0041] When the power generation subsystem 102 uses the geothermal fluid alone to generate electricity, the connection device between the solar unit 103 and the power generation subsystem 102 can be closed, so that the solar unit 103 and the power generation subsystem 102 are in a disconnected state, or the solar unit 103 can be directly closed, so that the solar unit 103 cannot obtain solar energy through the solar thermal fluid.

[0042] In the case where the power generation subsystem 102 solely utilizes solar thermal fluid to generate electricity, the connection device between the geothermal unit 104 and the power generation subsystem 102 can be closed, so that the geothermal unit 104 and the power generation subsystem 102 are in a disconnected state, or the geothermal unit 104 can be directly closed, so that the geothermal energy unit cannot obtain geothermal energy through geothermal fluid.

[0043] Furthermore, when the heating subsystem 101 utilizes the geothermal fluid and the solar thermal fluid for heating at the same time, the connection device between the geothermal unit 104 and the heating subsystem 101 can be opened, and the connection device between the solar unit 103 and the heating subsystem 101 can be opened at the same time, and it is ensured that the geothermal unit 104 and the solar unit 103 are in operation.

[0044] Furthermore, when the power generation subsystem 102 simultaneously utilizes the geothermal fluid and the solar thermal fluid to generate electricity, the connection device between the geothermal unit 104 and the power generation subsystem 102 can be opened, and the connection device between the solar unit 103 and the power generation subsystem 102 can be opened at the same time, and ensure that the geothermal unit 104 and the solar unit 103 are in operation.

[0045] The energy utilization system 100 provided by the above technical solution includes a heating subsystem 101, a power generation subsystem 102, a solar unit 103 and a geothermal unit 104. The geothermal unit 104 is coupled to the heating subsystem 101 and the power generation subsystem 102, respectively, and the solar unit 103 is coupled to the heating subsystem 101 and the power generation subsystem 102, respectively; the geothermal unit 104 is used to obtain geothermal energy through geothermal fluid, and the geothermal fluid is a fluid that provides the geothermal energy; the solar unit 103 is used to obtain solar energy through solar thermal fluid, and the solar thermal fluid is a fluid that provides the solar energy; the heating subsystem 101 is used to provide heating through the geothermal fluid and / or the solar thermal fluid; the power generation subsystem 102 is used to generate electricity through the geothermal fluid and / or the solar thermal fluid. In this way, by setting up the solar energy unit 103 and the geothermal unit 104, geothermal energy and solar energy can be coupled for utilization, thereby increasing the power generation and heating scale of the system and realizing larger-scale utilization of geothermal energy. In addition, by setting up the heating subsystem 101 and the power generation subsystem 102, geothermal fluid and / or solar thermal fluid can be utilized separately and in a cascade manner, which not only helps to meet the demand for high-grade heat sources of the heating system, but also improves the overall efficiency of the entire energy utilization system.

[0046] Considering that after the power generation subsystem 102 uses the geothermal fluid and / or the solar thermal fluid to generate electricity, the geothermal fluid and / or the solar thermal fluid still has a relatively high temperature. If the geothermal fluid is directly re-injected or re-enters the solar unit, it will cause energy waste. In order to improve the efficiency of thermal energy utilization, therefore, in some embodiments, such as Figure 2 As shown, the heating subsystem 101 can also be connected to the power generation subsystem 102.

[0047] Among them, the power generation subsystem 102 can be used to transport the geothermal fluid and / or the solar thermal fluid used for power generation to the heating subsystem 101; and the heating subsystem 101 is used to receive the geothermal fluid and / or the solar thermal fluid transported by the power generation subsystem 102 to obtain the waste heat remaining after the power generation subsystem 102 generates electricity.

[0048] By adopting the above technical scheme, after the power generation subsystem 102 uses the geothermal fluid and / or the solar thermal fluid to generate electricity, the thermal fluid that still has a relatively high temperature can be transported into the heating subsystem 101, so as to use the waste heat remaining after the power generation subsystem 102 generates electricity for supplementary heating. This not only helps to meet the demand of the heating system for high-grade heat sources, but also improves the overall efficiency of the entire energy utilization system.

[0049] In some embodiments, Figure 3 As shown, the system also includes a first valve 105 and a second valve 106. The geothermal unit 104 is coupled to the heating subsystem 101 and the power generation subsystem 102 through the first valve 105, and the solar unit 103 is coupled to the heating subsystem 101 and the power generation subsystem 102 through the second valve 106.

[0050] Among them, the first valve 105 is used to conduct the passage between the geothermal unit 104 and the heating subsystem 101, and / or to conduct the passage between the geothermal unit 104 and the power generation subsystem 102; and the second valve 106 is used to conduct the passage between the solar unit 103 and the heating subsystem 101, and / or to conduct the passage between the solar unit 103 and the power generation subsystem 102.

[0051] For example, the first valve 105 may include a three-way valve, and the valve ports provided therein may be connected to different equipment systems. For example, the first port of the first valve 105 may be connected to the output port of the geothermal unit 104, the second port of the first valve 105 may be connected to the heating subsystem 101, and the third port of the first valve 105 may be connected to the power generation subsystem 102.

[0052] Specifically, when the power generation subsystem 102 solely utilizes the geothermal fluid to generate electricity, the connection between the first port and the second port of the first valve 105 can be closed, so that the geothermal fluid in the geothermal unit 104 can be transported to the power generation subsystem 102 through the connection between the first port and the third port of the first valve 105, so that the power generation subsystem 102 can solely utilize the geothermal fluid to generate electricity; and when the power generation subsystem 102 solely utilizes the solar thermal fluid to generate electricity, the connection between the first port and the second port of the second valve 106 can be closed, so that the solar thermal fluid in the solar unit 103 can be transported to the power generation subsystem 102 through the connection between the first port and the third port of the second valve 106, so that the power generation subsystem 102 can solely utilize the solar thermal fluid to generate electricity.

[0053] Similarly, when the heating subsystem 101 solely utilizes the geothermal fluid for heating, the connection between the first port and the third port of the first valve 105 can be closed so that the heating subsystem 101 can solely utilize the geothermal fluid for heating, and when the heating subsystem 101 solely utilizes the solar thermal fluid for heating, the connection between the first port and the third port of the second valve 106 can be closed so that the heating subsystem 101 solely utilizes the solar thermal fluid for heating.

[0054] Furthermore, when the power generation subsystem 102 uses the geothermal fluid and the solar thermal fluid to generate electricity together, the connection between the first port and the second port of the first valve 105 can be closed, and the connection between the first port and the second port of the second valve 106 can be closed, so that the geothermal fluid in the geothermal unit 104 can be transported to the power generation subsystem 102 through the connection between the first port and the third port of the first valve 105, and the solar thermal fluid in the solar unit 103 can be transported to the power generation subsystem 102 through the connection between the first port and the third port of the second valve 106.

[0055] Similarly, when the heating subsystem 101 utilizes the geothermal fluid and the solar thermal fluid to jointly provide heating, the connection between the first port and the third port of the first valve 105 can be closed, and the connection between the first port and the third port of the second valve 106 can be closed, so that the heating subsystem 101 can utilize the geothermal fluid and the solar thermal fluid to jointly provide heating.

[0056] In another possible implementation, the geothermal fluid can also be used for simultaneous heating and power generation. In this case, all passages of the first valve 105 can be opened. For example, the connection between the first port and the second port of the first valve 105 can be opened, and the connection between the first port and the third port of the first valve 105 can be opened. In this way, the geothermal fluid can be used directly for simultaneous heating and power generation.

[0057] Similarly, the solar thermal fluid can also be used for simultaneous heating and power generation. In this case, all passages of the second valve 106 can be opened. For example, the connection between the first port and the second port of the second valve 106 can be opened, and the connection between the first port and the third port of the second valve 106 can be opened. In this way, the solar thermal fluid can be used directly for simultaneous heating and power generation.

[0058] In another possible implementation, the geothermal fluid and the solar thermal fluid may be used to simultaneously provide heat and generate electricity.

[0059] In this implementation, all passages of the first valve 105 and the second valve 106 can be opened at the same time. In this case, the geothermal fluid can be transported to the heating subsystem 101 and the power generation subsystem 102 respectively through the first port and the second port of the first valve 105, and at the same time, the solar thermal fluid can be transported to the heating subsystem 101 and the power generation subsystem 102 respectively through the first port and the second port of the second valve 106.

[0060] It should be noted that, in actual application, when heat supply and power generation are performed simultaneously, the valve openings of the first valve 105 and the second valve 106 can be adjusted accordingly according to the actual requirements of heat supply and power generation efficiency. For example, the valve opening of the second port of the first valve 105 and the valve opening of the second port of the second valve 106 can be adjusted according to the actual requirements of power generation efficiency, so that the thermal fluid passing through the first valve 105 and the second valve 106 meets the actual requirements of power generation efficiency. In addition, the valve opening of the third port of the first valve 105 and the valve opening of the third port of the second valve 106 can be adjusted according to the actual requirements of heating efficiency, so that the thermal fluid passing through the first valve 105 and the second valve 106 meets the actual requirements of heating efficiency.

[0061] Considering that, in the actual application process, after the geothermal fluid generates electricity through the power generation submodule, the geothermal fluid still has a relatively high temperature. If the geothermal fluid passing through the power generation submodule is directly discarded at this time, it will cause great economic losses. Therefore, the geothermal fluid passing through the power generation submodule can continue to be transported into the heating submodule to avoid the problem of most of the heat being wasted and improve the efficiency of thermal energy utilization.

[0062] By adopting the above technical solution, the geothermal fluid passing through the power generation submodule can be further transported into the heating submodule to avoid the problem of most of the heat being wasted and improve the efficiency of thermal energy utilization.

[0063] In some embodiments, Figure 4 As shown, the heating subsystem 101 includes a first heating subsystem 1011 and a second heating subsystem 1012 . The first heating subsystem 1011 is connected to the geothermal unit 104 via the first valve 105 ; the second heating subsystem 1012 is connected to the solar unit 103 via the second valve 106 .

[0064] The first heating subsystem 1011 can be used to provide heating through the geothermal fluid; and the second heating subsystem 1012 is used to provide heating through the solar thermal fluid.

[0065] In other embodiments, the first heating subsystem 1011 may include a first heat exchanger and a first heat utilization module that performs heat cycle exchange with the first heat exchanger; the first heat exchanger is connected to the geothermal unit 104 .

[0066] Among them, the first heat exchanger can be used to receive the geothermal fluid transported by the geothermal unit 104, and perform heat cycle exchange with the first heat utilization module through the geothermal fluid; the first heat utilization module can be used to obtain the heat of the geothermal fluid through heat cycle exchange.

[0067] Furthermore, the second heating subsystem 1012 includes a second heat exchanger and a second heat utilization module for performing heat cycle exchange with the second heat exchanger; the second heat exchanger is connected to the solar energy unit 103 .

[0068] The second heat exchanger is used to receive the solar thermal fluid delivered by the solar unit 103, and to perform heat cycle exchange with the second heat utilization module through the solar thermal fluid; the second heat utilization module is used to obtain the heat of the solar fluid through heat cycle exchange.

[0069] Furthermore, the second heat exchanger may also be connected to the power generation subsystem 102 .

[0070] The power generation subsystem 102 is used to transport the solar thermal fluid used for power generation to the second heat exchanger; The second heat exchanger is also used to receive the solar thermal fluid delivered by the power generation subsystem 102 to obtain the waste heat remaining after the power generation subsystem 102 generates electricity; and to perform heat cycle exchange with the second heat utilization module through the solar thermal fluid, so that the second heat utilization module can obtain the waste heat remaining after the power generation subsystem 102 generates electricity.

[0071] The above technical solution is adopted, and an energy utilization system 100 provided by the above technical solution includes a heating subsystem, a power generation subsystem 102, a solar unit 103 and a geothermal unit 104. The geothermal unit 104 is coupled to the heating subsystem and the power generation subsystem 102 respectively, and the solar unit 103 is coupled to the heating subsystem and the power generation subsystem 102 respectively; the geothermal unit 104 is used to obtain geothermal energy through geothermal fluid; the solar unit 103 is used to obtain solar energy through solar thermal fluid; the heating subsystem is used to provide heating through the geothermal fluid and / or the solar thermal fluid; the power generation subsystem 102 is used to generate electricity through the geothermal fluid and / or the solar thermal fluid. In this way, by setting up the solar energy unit 103 and the geothermal unit 104, geothermal energy and solar energy can be coupled for utilization, thereby increasing the power generation and heating scale of the system and realizing larger-scale utilization of geothermal energy. In addition, by setting up the heating subsystem and the power generation subsystem 102, geothermal fluid and / or solar thermal fluid can be utilized separately and in a cascade manner, which can not only meet the demand of the heating system for high-grade heat sources, but also improve the overall efficiency of the entire energy cascade utilization system.

[0072] Figure 5 It is a specific logic diagram of a fluid flow according to an exemplary embodiment. The operation strategy of the energy utilization system 100 can be explained through the following situations, and the fluid flow in the geothermal fluid and the solar thermal fluid can be explained.

[0073] In the case where the power generation subsystem 102 uses the geothermal fluid alone to generate electricity, Figure 5 As shown, the specific logic of the fluid flow of the geothermal fluid in the energy utilization system 100 is as follows: The geothermal fluid power generation adopts a two-stage power generation cycle. For geothermal fluid, the geothermal fluid produced from the geothermal production well 32 passes through the first three-way valve 1, and then all enters the first evaporator 2, exchanges heat with the circulating working fluid in the first-stage power generation cycle module, and then enters the second evaporator 10, continues to exchange heat with the circulating working fluid in the second-stage power generation cycle, and then enters the heating module. For the circulating working fluid, the working fluid in the first-stage power generation cycle system is pressurized by the first working fluid pump 8 and enters the first reheater 6 for preheating, and then is further preheated by the first preheater 9, enters the first evaporator 2 to generate high-temperature and high-pressure steam, and is further heated by the first superheater 3, and then expands and works in the first turbine 4, driving the first generator 15 to operate and generate electricity, and the steam after power generation then enters the first reheater 6 to preheat the circulating working fluid, and finally re-enters the first working fluid pump 8 after condensation in the first air condenser 7, completing the working fluid circulation in the first-stage power generation cycle; In the secondary power generation cycle system, the working fluid is pressurized by the second working fluid pump 16 and then enters the second reheater 14 for preheating, and then is further preheated by the second preheater 18, enters the second evaporator 10 to generate high-temperature and high-pressure steam, and is further heated by the second superheater 11, and then expands and does work in the second turbine 12, driving the second generator 13 to operate and generate electricity. The steam after power generation then enters the second reheater 14 to preheat the circulating working fluid, and finally is condensed in the second air condenser 15 and then re-enters the second working fluid pump 16, completing the working fluid circulation in the secondary power generation cycle.

[0074] In the case where the heating subsystem uses the geothermal fluid alone for heating, Figure 5 As shown, the specific logic of the fluid flow of the geothermal fluid in the energy utilization system 100 is as follows: The geothermal fluid extracted from the geothermal production well 32 directly enters the heating module after passing through the first three-way valve 1. After entering the fourth heat exchanger 28, the geothermal fluid exchanges heat with the circulating working fluid therein and provides heat for the fourth heat utilization module 29. Then, it passes through the fourth three-way valve 27 and mixes with the geothermal fluid at the outlet of the second evaporator 10 in the secondary power generation system, enters the third heat exchanger 25 to exchange heat with the circulating working fluid and provide heat for the third heat utilization module 26. Then, it enters the underground through the geothermal recharge well 30 and reheats in the geothermal energy heating layer 31. Finally, it is extracted through the geothermal production well 32 and re-enters the first three-way valve 1 to complete the cycle.

[0075] And in the case where the power generation subsystem 102 uses the solar thermal fluid alone to generate electricity, the power generation subsystem 102 includes a multi-stage power generation cycle, for example, it may include a two-stage power generation cycle, such as Figure 5 As shown, the specific logic of the flow direction of the solar thermal fluid in the energy utilization system 100 is as follows: The thermal fluid generated from the solar collector 33 all enters the second three-way valve 17 through the third three-way valve 19 and is diverted again. A part of the thermal fluid enters the second superheater 11 in the secondary power generation cycle to further heat the high-temperature and high-pressure circulating working fluid steam, and then enters the second preheater 18 to preheat the circulating working fluid, and then passes through the fifth three-way valve 34 to the first four-way valve 22 of the heating module; another part of the thermal fluid in the second three-way valve 17 enters the first superheater 3 in the primary power generation cycle to further heat the high-temperature and high-pressure circulating working fluid steam, and then enters the first preheater 9 to preheat the circulating working fluid, and then enters the first four-way valve 22 of the heating module through the sixth three-way valve 36.

[0076] And when the heating subsystem uses the solar thermal fluid alone for heating, Figure 5 As shown, the specific logic of the flow direction of the solar thermal fluid in the energy utilization system 100 is as follows: The thermal fluid directly enters the heating module after passing through the third three-way valve 19. The thermal fluid enters the first heat exchanger 20 to exchange heat with the circulating working fluid, providing heat for the first heat utilization module 21, and then enters the first four-way valve 22 to mix with the thermal fluid from the outlet of the first preheater 9 of the primary power generation system and the outlet of the second preheater 18 of the secondary power generation system, and then enters the second heat exchanger 23 to provide heat for the second heat utilization module 24, and finally flows back to the solar collector 33 to complete the circulation of the solar thermal fluid.

[0077] And the geothermal fluid can be used to simultaneously generate heat and electricity, in which case, if Figure 5 As shown, the specific logic of the fluid flow of the geothermal fluid in the energy utilization system 100 is as follows: The passage in the first three-way valve 1 that flows to the heating module is opened, and part of the geothermal fluid flows to the first evaporator 2 for heat exchange, and part of the fluid flows to the heating module. After continuous heat exchange in the first evaporator 2 and the second evaporator 10, part of the geothermal fluid only flows to the fourth three-way valve 27 when passing through the seventh three-way valve 37; part of the geothermal fluid flows to the fourth three-way valve 27 after heat exchange in the fourth heat exchanger, and mixes with part of the geothermal fluid from the seventh three-way valve 37 in the fourth three-way valve 27, and then enters the third heat exchanger 25 for heat exchange, and then enters the geothermal energy heating layer 31 through the geothermal recharge well 31 to reheat, and finally re-enters the first three-way valve 11 through the geothermal production well 32 to complete the cycle.

[0078] And the solar thermal fluid can be used to simultaneously provide heat and generate electricity, in which case, if Figure 5 As shown, the specific logic of the flow direction of the solar thermal fluid in the energy utilization system 100 is as follows: The passage in the third three-way valve 19 that flows to the heating module is opened, and part of the thermal fluid in the solar thermal collector 33 flows to the second three-way valve 17, and part flows to the first heat exchanger 20. According to actual needs, the solar thermal fluid in the second three-way valve 17 can flow to the first superheater 3 or the second superheater 10 alone, or can flow to the first superheater 3 and the second superheater 10 at the same time. Among them, the geothermal fluid flowing to the first superheater 3 continues to exchange heat in the first preheater 9, and then flows to the first four-way valve 22 through the sixth three-way valve 36, and then flows to the second four-way valve 35 after heat exchange through the second heat exchanger 23, and finally re-enters the solar collector 33 for heating to complete the cycle; the geothermal fluid flowing to the second superheater 11 continues to exchange heat in the second preheater 18, and then flows to the first four-way valve 22 through the fifth three-way valve 34, and then flows to the second four-way valve 35 after heat exchange through the second heat exchanger 23, and finally re-enters the solar collector 33 for heating to complete the cycle.

[0079] It is also possible to use the geothermal fluid and the solar thermal fluid to simultaneously provide heat and generate electricity. In this case, Figure 5 As shown, the specific logic of the flow direction of the solar thermal fluid in the energy utilization system 100 is as follows: The passage in the first three-way valve 1 that flows to the heating module is opened, and part of the geothermal fluid flows to the first evaporator 2 for heat exchange, and part of the fluid flows to the heating module. After continuous heat exchange in the first evaporator 2 and the second evaporator 10, part of the geothermal fluid only flows to the fourth three-way valve 27 when passing through the seventh three-way valve 37; part of the geothermal fluid flows to the fourth three-way valve 27 after heat exchange in the fourth heat exchanger 28, and mixes with part of the geothermal fluid from the seventh three-way valve 37 in the fourth three-way valve 27, and then enters the third heat exchanger 25 for heat exchange, and then enters the geothermal energy heating layer 31 through the geothermal recharge well 30 to reheat, and finally re-enters the first three-way valve 1 through the geothermal production well 32 to complete the cycle.

[0080] And the passage in the third three-way valve 19 flowing to the heating module is opened, and the thermal fluid in the solar collector 33 partially flows to the second three-way valve 17, and partially flows to the first heat exchanger 20. According to actual needs, the solar thermal fluid in the second three-way valve 17 can flow to the first superheater 3 or the second superheater 10 alone, or can flow to the first superheater 3 and the second superheater 10 at the same time. Among them, the geothermal fluid flowing to the first superheater 3 continues to exchange heat in the first preheater 9, and then flows to the first four-way valve 22 through the sixth three-way valve 36, and then flows to the second four-way valve 35 after heat exchange through the second heat exchanger 23, and finally re-enters the solar collector 33 for heating to complete the cycle; the geothermal fluid flowing to the second superheater 11 continues to exchange heat in the second preheater 18, and then flows to the first four-way valve 22 through the fifth three-way valve 34, and then flows to the second four-way valve 35 after heat exchange through the second heat exchanger 23, and finally re-enters the solar collector 33 for heating to complete the cycle.

[0081] According to the operation strategy of the energy utilization system 100, by setting up the solar unit 103 and the geothermal unit 104, geothermal energy and solar energy can be coupled for utilization, thereby increasing the power generation and heating scale of the system and realizing larger-scale utilization of geothermal energy. In addition, by setting up the heating subsystem and the power generation subsystem 102, geothermal fluid and / or solar thermal fluid can be utilized separately and in a cascade manner, which can not only meet the demand of the heating system for high-grade heat sources, but also improve the overall efficiency of the entire energy utilization system.

[0082] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0083] Figure 6 FIG. 6 is a block diagram of an energy utilization device 600 according to an exemplary embodiment. Figure 6 As shown, the energy utilization device 600 includes any one of the energy utilization systems 100 described above.

[0084] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0085] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0086] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An energy utilization system, characterized in that: The system comprises a heating subsystem, a power generation subsystem, a solar energy unit and a geothermal unit, wherein the geothermal unit is coupled to the heating subsystem and the power generation subsystem respectively, and the solar energy unit is coupled to the heating subsystem and the power generation subsystem respectively; The geothermal unit is used to obtain geothermal energy through geothermal fluid, and the geothermal fluid is a fluid that provides the geothermal energy; The solar energy unit is used to obtain solar energy through a solar thermal fluid, wherein the solar thermal fluid is a fluid that provides the solar energy; The heating subsystem is used to provide heating through the geothermal fluid and / or the solar thermal fluid; The power generation subsystem is used to generate electricity using the geothermal fluid and / or the solar thermal fluid.

2. The energy utilization system according to claim 1, characterized in that: The heating subsystem is connected to the power generation subsystem; The power generation subsystem is used to transport the geothermal fluid and / or the solar thermal fluid used for power generation to the heat supply subsystem; The heat supply subsystem is used to receive the geothermal fluid and / or the solar thermal fluid delivered by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity.

3. The energy utilization system according to claim 2, characterized in that: The system further comprises a first valve and a second valve, wherein the geothermal unit is coupled to the heating subsystem and the power generation subsystem respectively through the first valve, and the solar unit is coupled to the heating subsystem and the power generation subsystem respectively through the second valve; The first valve is used to open the passage between the geothermal unit and the heating subsystem, and / or to open the passage between the geothermal unit and the power generation subsystem; The second valve is used to open the passage between the solar unit and the heating subsystem, and / or to open the passage between the solar unit and the power generation subsystem.

4. The energy utilization system according to claim 3, characterized in that: The heating subsystem comprises a first heating subsystem and a second heating subsystem, the first heating subsystem is connected to the geothermal unit through the first valve; the second heating subsystem is connected to the solar energy unit through the second valve; The first heating subsystem is used to provide heat through the geothermal fluid; The second heating subsystem is used for providing heat through the solar thermal fluid.

5. The energy utilization system according to claim 4, characterized in that: The power generation subsystem is used to transport the geothermal fluid used for power generation to the first heat supply subsystem, and / or to transport the solar thermal fluid used for power generation to the second heat supply subsystem; The first heat supply subsystem is used to receive the geothermal fluid delivered by the power generation subsystem to obtain the residual heat remaining after the power generation subsystem generates electricity; The second heat supply subsystem is used to receive the solar thermal fluid delivered by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity.

6. The energy utilization system according to any one of claims 1 to 5, characterized in that: The power generation subsystem includes a multi-stage power generation cycle.

7. The energy utilization system according to claim 4, characterized in that: The first heating subsystem includes a first heat exchanger and a first heat utilization module for heat cycle exchange with the first heat exchanger; the first heat exchanger is connected to the geothermal unit; The first heat exchanger is used to receive the geothermal fluid delivered by the geothermal unit and perform heat cycle exchange with the first heat utilization module through the geothermal fluid; The first heat utilization module is used to obtain heat from the geothermal fluid through heat cycle exchange.

8. The energy utilization system according to claim 7, characterized in that: The first heat exchanger is also connected to the power generation subsystem; The power generation subsystem is used to transport the geothermal fluid used for power generation to the first heat exchanger; The first heat exchanger is also used to receive the geothermal fluid transported by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity; and to perform heat cycle exchange with the first heat utilization module through the geothermal fluid, so that the first heat utilization module can obtain the waste heat remaining after the power generation subsystem generates electricity.

9. The energy utilization system according to claim 4, characterized in that: The second heat supply subsystem includes a second heat exchanger and a second heat utilization module for heat cycle exchange with the second heat exchanger; the second heat exchanger is connected to the solar energy unit; The second heat exchanger is used to receive the solar thermal fluid delivered by the solar unit and perform heat cycle exchange with the second heat utilization module through the solar thermal fluid; The second heat utilization module is used to obtain the heat of the solar fluid through heat cycle exchange.

10. The energy utilization system according to claim 4, characterized in that: The second heat exchanger is also connected to the power generation subsystem; The power generation subsystem is used to deliver the solar thermal fluid used for power generation to the second heat exchanger; The second heat exchanger is also used to receive the solar thermal fluid delivered by the power generation subsystem to obtain the waste heat remaining after the power generation subsystem generates electricity; and to perform heat cycle exchange with the second heat utilization module through the solar thermal fluid, so that the second heat utilization module can obtain the waste heat remaining after the power generation subsystem generates electricity.

11. An energy utilization device, characterized in that: The energy utilization device comprises the energy utilization system according to any one of claims 1-10.

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