A geothermal photovoltaic circulating water system

Abstract

The present invention relates to the field of distributed energy technologies, and particularly to a geothermal photovoltaic circulating water system. The present invention is provided with a photovoltaic module, a heat exchange module, a first circulation loop, a second circulation loop, a third circulation loop, and a control module. The control module determines whether temperature management of the conversion unit is required based on the temperature of the conversion unit. Under the condition that it is determined that temperature management of the conversion unit is required, the opening and closing of each circulation loop are controlled, including that under the condition that the temperature of the conversion unit is less than or equal to a preset operating temperature threshold, the second circulation loop is controlled to open, and under the condition that the temperature of the conversion unit is greater than the operating temperature threshold, the second circulation loop and the third circulation loop are controlled to open. Furthermore, temperature control of the photovoltaic power generation conversion unit is achieved by using the circulating water of the system, and the heat generated by the photovoltaic power generation is reasonably utilized during this process, improving the stability of the system operation and the energy utilization rate.

Description

Technical Field

[0001] The present invention relates to the field of distributed energy technology, and in particular to a geothermal photovoltaic circulating water system. Background Art

[0002] With the rapid expansion of urban scale, the demand for energy in cities is also increasing. In order to avoid environmental pollution, the use of geothermal energy and photovoltaics in heating has become the main direction of urban heating development today. Geothermal energy has large reserves and high stability, and photovoltaic power generation uses clean and renewable solar energy. Therefore, the rational use of geothermal energy combined with photovoltaic power generation for heating is an important direction for future development. It is crucial to improve the energy utilization efficiency of the heating system and ensure the stability of the system.

[0003] Chinese patent publication number: CN114447969A, discloses a geothermal-photovoltaic-energy storage multi-energy complementary energy station system, including a geothermal well module and an energy storage power generation module, the energy storage power generation module includes a photovoltaic panel, a power grid and a battery system; the photovoltaic panel includes a bottom plate and a solar panel arranged above the bottom plate, the upper and lower sides of the solar panel are respectively provided with mutually parallel auxiliary rods and transmission rods, and the outer sides of the auxiliary rod and the transmission rod are rotatably provided with a belt-shaped mesh belt covering the outer side of the solar panel. The effect is: by arranging an automatic snow cleaning device on the photovoltaic panel structure of the multi-energy complementary energy station system, after snow is generated at the photovoltaic panel position, the snow accumulation on the outer force plate of the driving rod is rotated to drive the transmission rod and the mesh belt to rotate in turn, and the snow on the surface of the solar panel is scraped off by the mesh belt, and the rotation support and periodic vibration of the solar panel are realized synchronously, and the snow removal process is assisted, without manual or electrified operation, and the labor of maintenance personnel is reduced.

[0004] It can be seen that the prior art still has the following problems:

[0005] 1. In the prior art, the reduction in photovoltaic power generation efficiency caused by heat generation during photovoltaic power generation is not considered, which affects the working stability and working efficiency of the system;

[0006] 2. In the prior art, the heat generated during photovoltaic power generation is not utilized, resulting in energy waste. Summary of the invention

[0007] To achieve the above object, the present invention provides a geothermal photovoltaic circulating water system, comprising:

[0008] A photovoltaic module, comprising a conversion unit for converting light energy into electrical energy, an energy storage unit for storing the electrical energy output by the conversion unit, a temperature collection unit for collecting the temperature of the conversion unit, and a temperature control unit for performing temperature management on the conversion unit;

[0009] A geothermal module for extracting a medium from a geothermal water layer and outputting it.

[0010] A heat exchange module connected to the photovoltaic module, a heat supply terminal, and the geothermal module, for converting the heat of the medium output by the geothermal module into the medium of the pipeline connected to the heat supply terminal and heating the medium in the pipeline.

[0011] A first circulation loop including a pipeline connecting the heat supply terminal and the heat exchange module to transmit the medium output by the heat supply terminal to the heat exchange module for heat exchange.

[0012] A second circulation loop including a pipeline connecting the heat supply terminal, the photovoltaic module, and the heat exchange module to cool the conversion unit through the medium output by the heat supply terminal and transmit the medium to the heat exchange module.

[0013] A third circulation loop including a pipeline connecting the water inlet of the geothermal module, the photovoltaic module, the water outlet of the geothermal module, and the heat exchange module to cool the conversion unit by intercepting the medium to be input into the water inlet of the geothermal module and transmit the medium to the heat exchange module.

[0014] A control module connected to the temperature acquisition unit and the valves in each circulation loop, for determining whether temperature management of the conversion unit is required based on the temperature of the medium output by the heat supply terminal, and controlling the opening and closing of each circulation loop under the condition that temperature management of the conversion unit is determined to be required, including

[0015] Controlling the second circulation loop to open under a first preset condition.

[0016] Controlling the second circulation loop and the third circulation loop to open under a second preset condition.

[0017] The first preset condition is that the temperature of the conversion unit is greater than a preset operating temperature threshold, and the second preset condition is that the temperature of the conversion unit is still lower than the operating temperature threshold after a predetermined time length when the second circulation loop is opened.

[0018] Further, the heat exchange module includes a heat exchange unit and a heating unit, wherein

[0019] A geothermal pipeline for transmitting the medium output by the geothermal module and a heat supply pipeline for transmitting the medium output by the heat supply terminal are arranged inside the heat exchange unit, so that the heat of the geothermal pipeline is transferred to the heat supply pipeline.

[0020] The heating unit is arranged on one side of the heat supply pipeline for converting the electric energy generated by the photovoltaic module into heat energy to heat the heat supply pipeline.

[0021] Further, the liquid inlet end of the geothermal pipeline is connected to the second circulation loop and the third circulation loop and is connected to the water outlet of the geothermal module, and the liquid outlet end of the geothermal pipeline is connected to the third circulation loop and is connected to the water inlet of the geothermal module.

[0022] One end of the heating pipeline is connected to the second circulation loop, and the other end is connected to the first circulation loop and the second circulation loop and is connected to the heating terminal.

[0023] Further, the liquid outlet end of the geothermal pipeline is connected to a distiller, and the distiller is connected to a storage tank through a pipeline to convey the distilled distillation medium to the storage tank, and the pipeline passes through a secondary heat exchanger to transfer the heat in the distillation medium to the medium conveyed by the heating terminal to the secondary heat exchanger.

[0024] Further, the temperature control unit is arranged on one side of the conversion unit and includes a spiral circulation pipeline and a heat exchange medium arranged on one side of the spiral circulation pipeline. Both ends of the spiral circulation pipeline are connected to the second circulation loop and the third circulation loop, so that the temperature of the conversion unit is transferred to the first circulation loop and the second circulation loop to cool the conversion unit.

[0025] Further, the temperature control unit includes a spiral circulation pipeline and a heat exchange medium arranged on one side of the spiral circulation pipeline. Both ends of the spiral circulation pipeline are connected to the first circulation loop and the second circulation loop.

[0026] Further, the control module determines whether temperature management of the conversion unit is required based on the temperature of the medium output by the heating terminal, wherein

[0027] The temperature of the medium output by the heating terminal is compared with a preset heat exchange temperature threshold, and the heat exchange temperature threshold is less than the operating temperature threshold;

[0028] If the temperature of the conversion unit is less than or equal to the heat exchange temperature threshold, the control module determines that temperature management of the conversion unit is required;

[0029] If the temperature of the conversion unit is greater than the heat exchange temperature threshold, the control module determines that temperature management of the conversion unit is not required.

[0030] Further, the control module is also used to control the opening of the first circulation loop under the condition that it is determined that temperature management of the conversion unit is not required.

[0031] Further, a delay protection duration is set in the control module. After the control module controls the opening or closing of the second circulation loop or / and the third circulation loop respectively, it can control the opening or closing of the second circulation loop or / and the third circulation loop again only after the delay protection duration has passed.

[0032] Further, the control module is also connected to a display, and the display is used to display the temperature of the conversion unit and the opening and closing states of each circulation loop.

[0033] Compared with the prior art, the present invention is provided with a photovoltaic module, a heat exchange module, a first circulation loop, a second circulation loop, a third circulation loop and a control module. The control module determines whether temperature management needs to be performed on the conversion unit based on the temperature of the conversion unit. Under the condition that it is determined that temperature management needs to be performed on the conversion unit, the opening and closing of each circulation loop are controlled. Specifically, when the temperature of the conversion unit is less than or equal to a preset operating temperature threshold, the second circulation loop is controlled to open; when the temperature of the conversion unit is greater than the operating temperature threshold, the second circulation loop and the third circulation loop are controlled to open. Thus, the temperature control of the conversion unit of the photovoltaic module is realized by using the system circulating water, and the heat generated by photovoltaic power generation is reasonably utilized in this process, improving the stability of system operation and energy utilization rate.

[0034] In particular, the present invention manages and controls the temperature of the conversion unit of the photovoltaic module by setting a temperature control unit. In actual situations, during the process of photovoltaic power generation, due to solar irradiation and the heat generation of the photoelectric conversion unit itself, the increase in unit temperature during the working state will significantly affect the power generation efficiency of photovoltaic power generation. Therefore, it is crucial to ensure that the conversion unit operates at a reasonable and efficient working temperature. The present invention realizes the temperature management of the conversion unit by flowing water with a lower temperature through the temperature control unit, improving the stability of system operation and energy utilization rate.

[0035] In particular, the present invention adaptively manages the temperature of the conversion unit of the photovoltaic module by setting each circulation loop. In actual situations, the temperature output by the heat supply terminal in the second circulation loop or the third circulation loop will affect the cooling efficiency of the conversion unit. Based on this, it is determined whether to perform temperature management on the conversion unit of the photovoltaic module. When the temperature is high, the cooling efficiency is low, and the first circulation loop is adopted to improve the heat exchange efficiency. When the temperature is low, the cooling efficiency is fast, and the medium in the second circulation loop and the third circulation loop can be heated by the conversion unit, improving the heat utilization rate. Combining the further heat exchange and heating of the second circulation loop and the third circulation loop by the heat exchange module to increase the heat supply temperature of the heat supply terminal, and improving the energy utilization rate of the system through the switching of the circulation loop.

[0036] In particular, the temperature control unit of the present invention is connected to each circulation loop. In actual situations, after the heat of the medium in each circulation loop is exchanged or dissipated, the circulating water with less heat flows through the temperature control unit to absorb and transfer the heat generated by the conversion unit. The circulating water after absorbing the heat of the conversion unit has its heat increased in the next round of circulation. Thus, the reasonable utilization of the heat generated during the photovoltaic power generation process is achieved, and the energy utilization efficiency of the system is improved.

[0037] In particular, the control module of the present invention sets a delay protection time. In actual situations, due to the volatility of the temperature of the conversion unit, the temperature of the conversion unit may jump up and down near the operating temperature threshold within a short period, which easily causes the control module to frequently and unnecessarily switch the opening and closing of the circulation loop. By setting a delay protection time at the moment of temperature change, the present invention avoids the influence of the temperature fluctuation of the conversion unit on the control module. Thus, the stability of the system operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural block diagram of the geothermal photovoltaic circulating water system according to an embodiment of the invention;

[0039] Figure 2 It is a structural block diagram of the photovoltaic module according to an embodiment of the invention;

[0040] Figure 3 It is a schematic structural diagram of the temperature control unit according to an embodiment of the invention;

[0041] Figure 4 It is a schematic structural diagram of the heat exchange unit according to an embodiment of the invention;

[0042] In the figure, 1: heat exchange medium, 2: spiral-shaped circulation pipeline, 3: geothermal pipeline, 4: heat exchange pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] In order to make the objectives and advantages of the present invention clearer and more understandable, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0045] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0046] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Please refer to Figure 1 and Figure 2 as shown Figure 1 which is a structural block diagram of the geothermal photovoltaic circulating water system according to an embodiment of the invention. Figure 2 which is a structural block diagram of the photovoltaic module according to an embodiment of the invention. The present invention provides a geothermal photovoltaic circulating water system, including:

[0048] A photovoltaic module, which includes a conversion unit for converting light energy into electrical energy, an energy storage unit for storing the electrical energy output by the conversion unit, a temperature acquisition unit for acquiring the temperature of the conversion unit, and a temperature control unit for managing the temperature of the conversion unit;

[0049] A geothermal module, which is used to extract a medium from the geothermal water layer and output it;

[0050] A heat exchange module, which is connected to the photovoltaic module, the heat supply terminal, and the geothermal module, and is used to convert the heat of the medium output by the geothermal module into the medium in the pipeline connected to the heat supply terminal and heat the medium in the pipeline;

[0051] A first circulation loop, which includes a pipeline connecting the heat supply terminal and the heat exchange module to transfer the medium output by the heat supply terminal to the heat exchange module for heat exchange;

[0052] A second circulation loop, which includes a pipeline connecting the heat supply terminal, the photovoltaic module, and the heat exchange module to cool the conversion unit with the medium output by the heat supply terminal and transfer the medium to the heat exchange module;

[0053] A third circulation loop, which includes pipelines connecting the water inlet of the geothermal module, the photovoltaic module, the water outlet of the geothermal module, and the heat exchange module, so as to cool the conversion unit by intercepting the medium to be input into the water inlet of the geothermal module, and transmit the medium to the heat exchange module;

[0054] A control module, which is connected to the temperature acquisition unit and the valves in each circulation loop, and is used to determine whether temperature management of the conversion unit is required based on the temperature of the medium output by the heat supply terminal. Under the condition that it is determined that temperature management of the conversion unit is required, control the opening and closing of each circulation loop, including,

[0055] Under a first preset condition, control the second circulation loop to open;

[0056] Under a second preset condition, control the second circulation loop and the third circulation loop to open;

[0057] The first preset condition is that the temperature of the conversion unit is greater than a preset operating temperature threshold, and the second preset condition is that the temperature of the conversion unit is still lower than the operating temperature threshold after a predetermined time when the second circulation loop is opened.

[0058] Among them, the operating temperature threshold is measured in advance. Specifically, measure the power conversion efficiency of the conversion unit in different temperature ranges, and obtain the temperature range where the best power conversion efficiency is located. Determine the lower limit of the temperature range as the operating temperature threshold.

[0059] Specifically, the present invention does not limit the specific structure of the temperature acquisition unit, as long as it can complete the temperature acquisition of the conversion unit. This is prior art and will not be elaborated here.

[0060] Specifically, the present invention does not limit the specific structure of the control module. It can be composed of logic components, and the logic components include a microcontroller, a processor, or a field programmable component. This is prior art and will not be elaborated here.

[0061] Specifically, the temperature output by the heat supply terminal in the second circulation loop or the third circulation loop will affect the cooling efficiency of the conversion unit. Based on this, determine whether to perform temperature management on the conversion unit of the photovoltaic module. When the temperature is high, the cooling efficiency is low, and the first circulation loop is adopted to improve the heat exchange efficiency. When the temperature is low, the cooling efficiency is fast, and the medium in the second circulation loop and the third circulation loop can be heated through the conversion unit, improving the heat utilization rate. Combining the further heat exchange and heating of the second circulation loop and the third circulation loop by the heat exchange module can increase the heat supply temperature of the heat supply terminal and improve the energy utilization rate of the system.

[0062] Specifically, please refer to Figure 3As shown, a geothermal pipeline for transporting the output medium of the geothermal module and a heating pipeline for transporting the output medium of the heating terminal are arranged inside the heat exchange unit, so that the heat of the geothermal pipeline is transferred to the heating pipeline, and a heat exchange medium is filled between the pipelines to improve the heat exchange efficiency.

[0063] The heating unit is arranged on one side of the heating pipeline to convert the electric energy generated by the photovoltaic module into heat energy to heat the heating pipeline.

[0064] Specifically, the liquid inlet end of the geothermal pipeline is connected to the second circulation loop and the third circulation loop and is connected to the water outlet of the geothermal module, and the liquid outlet end of the geothermal pipeline is connected to the third circulation loop and is connected to the water inlet of the geothermal module.

[0065] One end of the heating pipeline is connected to the second circulation loop, and the other end is connected to the first circulation loop and the second circulation loop and is connected to the heating terminal.

[0066] In this embodiment, there is no limitation on the way that the liquid inlet end of the pipeline is connected to the second circulation loop and the third circulation loop, as long as the connection and control of the conduction of each pipeline can be achieved. For example, a three-way valve can be selected to connect the liquid inlet end to the third circulation loop and the second circulation loop. Of course, in this embodiment, for the connection methods of other pipelines when they are connected, those skilled in the art can select the connection method according to specific needs. For example, a three-way valve, a four-way valve, etc. can be selected to connect the pipelines, and details will not be described hereinafter.

[0067] Specifically, the present invention does not make specific limitations on the way of controlling the opening and closing of the circulation loop. In this embodiment, the opening and closing of each circulation loop can be realized by controlling the opening and closing of various valves in different circulation loops, and those skilled in the art can set according to specific situations.

[0068] Specifically, the liquid outlet end of the geothermal pipeline is connected to the distiller, and the distiller is connected to the storage tank through a pipeline to transport the distilled distillation medium to the storage tank. Moreover, the pipeline passes through a secondary heat exchanger to convert the heat in the distilled medium into the medium transported by the heating terminal to the secondary heat exchanger.

[0069] Please refer to Figure 4 shown Figure 4 As shown in the structural schematic diagram of the temperature control unit of the invention embodiment, the temperature control unit is arranged on one side of the conversion unit and includes a spiral circulation pipeline and a heat exchange medium arranged on one side of the spiral circulation pipeline. Both ends of the spiral circulation pipeline are connected to the second circulation loop and the third circulation loop, so that the temperature of the conversion unit is transferred to the first circulation loop and the second circulation loop to cool the conversion unit.

[0070] Specifically, the temperature control unit includes a spiral circulation pipeline and a heat exchange medium disposed on one side of the spiral circulation pipeline. Both ends of the spiral circulation pipeline are connected to a first circulation loop and a second circulation loop.

[0071] Specifically, the temperature control unit of the present invention is connected to each circulation loop. In actual situations, after the heat of the medium in each circulation loop is exchanged or dissipated, the circulating water with less heat flows through the temperature control unit to absorb and transfer the heat generated by the conversion unit. The circulating water after absorbing the heat of the conversion unit has its heat increased in the next round of circulation. Thus, the heat generated during the photovoltaic power generation process is reasonably utilized, and the energy utilization rate of the system is improved.

[0072] Specifically, the present invention manages and controls the temperature of the conversion unit of the photovoltaic module by setting a temperature control unit. In actual situations, during the photovoltaic power generation process, due to solar irradiation and the heat generation of the photoelectric conversion unit itself, the increase in the unit temperature during the working state will significantly affect the power generation efficiency of the photovoltaic power generation. It is crucial to ensure that the conversion unit operates at a reasonable and efficient working temperature. The present invention realizes the temperature management of the conversion unit by flowing the water with a lower temperature through the temperature control unit, improving the stability of the system operation and the energy utilization rate.

[0073] Specifically, the control module determines whether temperature management of the conversion unit is required based on the temperature of the medium output by the heat supply terminal, where

[0074] the temperature of the medium output by the heat supply terminal is compared with a preset heat exchange temperature threshold, and the heat exchange temperature threshold is less than the operating temperature threshold.

[0075] If the temperature of the conversion unit is less than or equal to the heat exchange temperature threshold, the control module determines that temperature management of the conversion unit is required;

[0076] If the temperature of the conversion unit is greater than the heat exchange temperature threshold, the control module determines that temperature management of the conversion unit is not required.

[0077] In this embodiment, the heat exchange temperature threshold Te is determined based on the operating temperature threshold Tb, and Te = βTb is set, where β represents the heat exchange coefficient and 0.3 < β < 0.5.

[0078] Specifically, the control module is also used to control the opening of the first circulation loop under the condition that it is determined that temperature management of the conversion unit is not required.

[0079] A delay protection duration is set within the control module. After the control module controls the opening or closing of the second circulation loop and / or the third circulation loop respectively, it can control the opening or closing of the second circulation loop and / or the third circulation loop again only after the delay protection duration has elapsed.

[0080] In this embodiment, the delay protection duration is set within the range of 5 minutes to 15 minutes.

[0081] Specifically, the control module is also connected to a display, and the display is used to display the temperature of the conversion unit and the opening and closing states of each circulation loop.

[0082] Specifically, the control module of the present invention sets a delay protection time. In actual situations, due to the volatility of the temperature of the conversion unit, the temperature of the conversion unit may fluctuate up and down near the operating temperature threshold within a short period of time, which easily causes the control module to frequently and unnecessarily switch the opening and closing of the circulation loop. The present invention avoids the influence of the temperature fluctuation of the conversion unit on the control module by setting a delay protection time at the moment of temperature change, and thus improves the stability of the system operation.

[0083] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A geothermal photovoltaic circulating water system, characterized in that, Comprising: A photovoltaic module, which includes a conversion unit for converting light energy into electrical energy, an energy storage unit for storing the electrical energy output by the conversion unit, a temperature acquisition unit for acquiring the temperature of the conversion unit, and a temperature control unit for performing temperature management on the conversion unit; A geothermal module, which is used to extract a medium from a geothermal water layer and output it; A heat exchange module, which is connected to the photovoltaic module, a heating terminal, and the geothermal module, and is used to convert the heat of the medium output by the geothermal module into the medium of the pipeline connected to the heating terminal and heat the medium in the pipeline; A first circulation loop, which includes a pipeline connecting the heating terminal and the heat exchange module to transmit the medium output by the heating terminal to the heat exchange module for heat exchange; A second circulation loop, which includes a pipeline connecting the heating terminal, the photovoltaic module, and the heat exchange module to cool the conversion unit through the medium output by the heating terminal and transmit the medium to the heat exchange module; A third circulation loop, which includes a pipeline connecting the geothermal module water inlet, the photovoltaic module, the geothermal module water outlet, and the heat exchange module to cool the conversion unit by intercepting the medium to be input into the geothermal module water inlet and transmit the medium to the heat exchange module; A control module, which is connected to the temperature acquisition unit and the valves in each circulation loop, and is used to determine whether temperature management of the conversion unit is required based on the temperature of the medium output by the heating terminal. Under the condition that it is determined that temperature management of the conversion unit is required, the opening and closing of each circulation loop are controlled, including, Under a first preset condition, controlling the second circulation loop to open; Under a second preset condition, controlling the second circulation loop and the third circulation loop to open; The first preset condition is that the temperature of the conversion unit is greater than a preset operating temperature threshold, and the second preset condition is that the temperature of the conversion unit is still lower than the operating temperature threshold after a predetermined time when the second circulation loop is opened.

2. The geothermal photovoltaic circulating water system according to claim 1, characterized in that, The heat exchange module includes a heat exchange unit and a heating unit, wherein, Inside the heat exchange unit, there is a geothermal pipeline for transmitting the medium output by the geothermal module and a heating pipeline for transmitting the medium output by the heating terminal, so that the heat of the geothermal pipeline is transferred to the heating pipeline; The heating unit is arranged on one side of the heating pipeline and is used to convert the electrical energy generated by the photovoltaic module into heat energy to heat the heating pipeline.

3. The geothermal photovoltaic circulating water system according to claim 2, characterized in that, The liquid inlet end of the geothermal pipeline is connected to the second circulation loop and the third circulation loop and is connected to the geothermal module water outlet, and the liquid outlet end of the geothermal pipeline is connected to the third circulation loop and is connected to the geothermal module liquid inlet; One end of the heating pipeline is connected to the second circulation loop, and the other end is connected to the first circulation loop and the second circulation loop and is connected to the heating terminal.

4. The geothermal photovoltaic circulating water system according to claim 3, characterized in that, The liquid outlet end of the geothermal pipeline is connected to a distiller, and the distiller is connected to a storage tank through a pipeline to transport the distilled distillation medium to the storage tank. Moreover, the pipeline passes through a secondary heat exchanger to convert the heat in the distillation medium into the medium transported by the heating terminal to the secondary heat exchanger.

5. The geothermal photovoltaic circulating water system according to claim 1, wherein The temperature control unit is arranged on one side of the conversion unit and includes a spiral circulation pipeline and a heat exchange medium arranged on one side of the spiral circulation pipeline. Both ends of the spiral circulation pipeline are connected to the second circulation loop and the third circulation loop, so that the temperature of the conversion unit is transferred to the first circulation loop and the second circulation loop to cool the conversion unit.

6. The geothermal photovoltaic circulating water system according to claim 5, characterized in that, The temperature control unit includes a spiral circulation pipeline and a heat exchange medium arranged on one side of the spiral circulation pipeline. Both ends of the spiral circulation pipeline are connected to the first circulation loop and the second circulation loop.

7. The geothermal photovoltaic circulating water system according to claim 1, wherein The control module determines whether temperature management of the conversion unit is required based on the temperature of the medium output by the heat supply terminal, where the temperature of the medium output by the heat supply terminal is compared with a preset heat exchange temperature threshold, and the heat exchange temperature threshold is less than the operating temperature threshold; if the temperature of the conversion unit is less than or equal to the heat exchange temperature threshold, the control module determines that temperature management of the conversion unit is required; if the temperature of the conversion unit is greater than the heat exchange temperature threshold, the control module determines that temperature management of the conversion unit is not required.

8. The geothermal photovoltaic circulating water system according to claim 7, characterized in that The control module is further configured to control the opening of the first circulation loop under the condition that it is determined that temperature management of the conversion unit is not required.

9. The geothermal photovoltaic circulating water system according to claim 1, characterized in that A delay protection duration is set in the control module. After the control module controls the opening or closing of the second circulation loop and / or the third circulation loop respectively, the second circulation loop and / or the third circulation loop can be controlled to be opened or closed again only after passing through the delay protection duration.

10. The geothermal photovoltaic circulating water system according to claim 1, wherein The control module is also connected to a display, and the display is used to display the temperature of the conversion unit and the opening and closing states of each circulation loop.

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