A thermal management system for wind, solar and biomass integrated power generation

Abstract

The present invention relates to a thermal management system for wind, solar and biogas integrated power generation, which is used to thermally interact with the photovoltaic cooling tube of a photovoltaic power generation device, the shaft seal cooling box of a wind power generation device, and the biogas fermentation tank of a biogas fermentation device. The thermal management system comprises: a first heat medium pipeline connected to the photovoltaic cooling tube via a first valve; a second heat medium pipeline connected to the shaft seal cooling box via a second valve; a first refrigerant pipeline connected to the biogas heater of the biogas fermentation tank via a third valve; a first temperature sensor for detecting the temperature inside the photovoltaic cooling tube; a second temperature sensor for detecting the temperature inside the shaft seal cooling box; a third temperature sensor for detecting the temperature inside the biogas heater; and a temperature controller for controlling the switching states of the first, second and third valves based on the detection results of the first, second and third temperature sensors. The present invention can achieve thermal integration of various power generation devices and save resources.

Description

Technical Field

[0001] The present invention generally relates to the field of renewable energy power generation. More specifically, the present invention relates to a thermal management system for wind, solar, and biomass integrated power generation. Background Art

[0002] At present, outdoor places with many electrical devices and high power consumption rates (such as farms) are usually equipped with power generation devices, especially new energy power generation devices, such as biogas power generation devices, photovoltaic power generation devices, and wind power generation devices. On the one hand, renewable energy power generation can reduce electricity costs, and on the other hand, it can be used to cope with sudden power outages. However, at present, multiple power generation devices in the same place usually operate independently, and there is no intelligent system to unify the management of each power generation device. As a result, the various power generation devices cannot complement each other's strengths and energy mutual assistance, resulting in energy waste.

[0003] Furthermore, each generator has a different power output. If a single generator is used to power a device, it will be unable to supply power if its power output is too low. On the other hand, if its power output is too high, power generation will be concentrated, which can easily put pressure on the grid and cause damage. Summary of the Invention

[0004] In order to at least solve the above problems, the present invention proposes a thermal management system for integrated wind, solar and biogas power generation. By thermally interacting the photovoltaic cooling tubes of the photovoltaic power generation device, the shaft seal cooling box of the wind power generation device and the biogas fermentation tank of the biogas fermentation device, heat complementarity is achieved between the various power generation devices, thereby saving energy.

[0005] In one aspect, the present invention provides a thermal management system for integrated wind, solar and biogas power generation, which is used to perform thermal interaction on the photovoltaic cooling tube of the photovoltaic power generation device, the shaft seal cooling box of the wind power generation device and the biogas fermentation tank of the biogas fermentation device, including: a first heat medium pipeline, which is connected to the photovoltaic cooling tube via a first valve; a second heat medium pipeline, which is connected to the shaft seal cooling box via a second valve; a first refrigerant pipeline, which is connected to the biogas heater of the biogas fermentation tank via a third valve; a first temperature sensor, which is used to detect the temperature inside the photovoltaic cooling tube; a second temperature sensor, which is used to detect the temperature inside the shaft seal cooling box; a third temperature sensor, which is used to detect the temperature inside the biogas heater; and a temperature controller, which is connected to the first temperature sensor, the second temperature sensor and the third temperature sensor to control the switching status of the first valve, the second valve and the third valve according to the detection results of the first temperature sensor, the second temperature sensor and the third temperature sensor.

[0006] In one embodiment, a third heat medium pipeline is further included, which is connected to the coolant tank of the biogas power generation device.

[0007] In one embodiment, the system further comprises a fourth heat medium pipeline connected to the boiler via a fourth valve.

[0008] In one embodiment, the first heat medium pipeline, the second heat medium pipeline, the third heat medium pipeline, the fourth heat medium pipeline and the first refrigerant pipeline are arranged in a heat exchange box.

[0009] In one embodiment, the biogas slurry output end of the biogas slurry fermentation tank is connected to a biogas slurry storage tank, and the biogas slurry storage tank is used to store the fermented biogas slurry.

[0010] In one embodiment, a roof is provided above the biogas slurry storage tank, and the photovoltaic power generation assembly is provided above the roof.

[0011] In one embodiment, the wind power generation device is arranged along the circumference of the biogas slurry storage tank.

[0012] In one embodiment, the biogas output end of the biogas fermentation device is connected to the biogas input end of the biogas power generation device.

[0013] In one embodiment, it further includes a power management controller and a power storage device, wherein the power management controller is connected to the power consumption load and the power storage device, and the biogas power generation device, the photovoltaic power generation device and the wind power generation device are all connected to the power management controller.

[0014] In one embodiment, the biogas slurry storage tank is covered with a closing film for closing the biogas slurry storage tank, and the top of the closing film is located between the roof and the photovoltaic power generation assembly.

[0015] Unlike the existing technology in which multiple power generation devices operate independently, the present invention conducts thermal interaction between the photovoltaic cooling tubes of the photovoltaic power generation device, the shaft seal cooling box of the wind power generation device, and the biogas fermentation device's biogas slurry heater, transferring the heat from the photovoltaic cooling tubes and the shaft seal cooling box to the biogas slurry fermentation tank. While promoting biogas slurry fermentation, it also reduces the temperature of the photovoltaic cooling tubes and the shaft seal cooling box. This improves the biogas output rate, while also improving the efficiency of photovoltaic and wind power generation, thereby saving energy and benefiting the environment. In addition, by automatically controlling the opening and closing of valves between the various power generation devices through temperature controllers, the heat conduction between the various power generation devices can be regulated more accurately and timely, thereby further promoting the rational operation of the above-mentioned thermal interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0017] Figure 1 This is a structural diagram showing a thermal management system for wind-solar-marine integrated power generation according to an embodiment of the present invention;

[0018] Figure 2 is a thermal interaction control flow chart illustrating a thermal management system for wind-solar-marsh integrated power generation according to an embodiment of the present invention; and

[0019] Figure 3 FIG. 4 is a block diagram illustrating a power output control module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The embodiments will now be described with reference to the accompanying drawings. It should be understood that for simplicity and clarity of explanation, reference numerals may be repeated in the accompanying drawings to indicate corresponding or similar elements, where deemed appropriate. In addition, this application sets forth many specific details in order to provide a thorough understanding of the embodiments described herein. However, one of ordinary skill in the art will understand that the embodiments described herein can be practiced without these specific details. In other cases, well-known methods, processes, and components are not described in detail to avoid obscuring the embodiments described herein. Moreover, this description should not be construed as limiting the scope of the embodiments described herein.

[0021] Existing photovoltaic modules generally utilize self-cooling. During hot summer months, the back surface temperature of a photovoltaic module can reach 70°C, while the operating junction temperature of the photovoltaic cell can reach 100°C. Given a nominal operating junction temperature of 25°C, the module's open-circuit voltage will decrease by approximately 213 × (100-25) × 36 = 6210 mV compared to the rated value. The peak power loss rate is approximately 14% × (100-25) = 30%. When photovoltaic cells (such as silicon solar cells) operate at high temperatures, their open-circuit voltage drops significantly with increasing temperature, significantly shifting the charging operating point and potentially causing system damage due to insufficient charging. The output power of photovoltaic cells also decreases significantly with increasing temperature, preventing the module from achieving its full performance. Therefore, photovoltaic cooling tubes are required to cool the photovoltaic light-emitting modules.

[0022] At the same time, the shaft seal of the wind turbine generator usually generates a large amount of heat during the power generation process, and needs to be cooled by a shaft seal cooling box. In addition, biogas fermentation is the basis for biogas production, and the factor that restricts the biogas output rate the most is temperature. The most suitable fermentation temperature for the currently commonly used medium-temperature fermentation bacteria is around 35°C. When the temperature is less than 16°C, biogas is basically no longer produced, so a biogas slurry heater 3 is usually used to heat the biogas slurry. In summary, the shaft seal of the wind turbine and the photovoltaic light-emitting components need to be cooled during the power generation process, and biogas fermentation requires heat, so how to fuse the heat of the three is a technical problem that needs to be solved urgently.

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0024] Figure 1 This diagram illustrates the structure of a thermal management system 100 for integrated wind, solar, and biogas power generation according to an embodiment of the present invention. To facilitate understanding of the technical solution of the present invention, the diagram also shows photovoltaic cooling tubes 1, shaft seal cooling box 2, biogas fermentation unit, boiler 4, and biogas power generation unit 8.

[0025] The present invention provides a thermal management system for integrated wind, solar, and biogas power generation. It is designed to thermally interact with the photovoltaic cooling tubes of a photovoltaic power generation device, the shaft seal cooling box of a wind power generation device, and the biogas slurry heater of a biogas fermentation device. In one application scenario, it may include a heat exchanger to achieve this thermal interaction. Because the types of liquids in the photovoltaic cooling tubes, shaft seal cooling box, and biogas slurry heater differ, the heat exchanger can include multiple heat transfer and refrigerant pipes, with different heat transfer pipes used to flow different liquids. The heat transfer pipes are used to flow high-temperature liquids, while the refrigerant pipes are used to flow low-temperature liquids. After the heat transfer and refrigerant pipes interact, the high-temperature liquid is cooled and the low-temperature liquid is heated. It should be emphasized that high temperature and low temperature are relative terms here; that is, the higher temperature liquid is called the high-temperature liquid, and the lower temperature liquid is called the low-temperature liquid. The following describes how the heat exchanger connects to the photovoltaic cooling tubes, shaft seal cooling box, and biogas slurry heater.

[0026] In one implementation scenario, the photovoltaic cooling tube can adopt a modular design that matches the size of the photovoltaic power generation module, allowing for quick connection, installation, and replacement, with the pipes connected by quick connectors. Its high-temperature coolant outlet is connected to the inlet of the first heat medium pipeline of the heat exchange box via a first valve and a first water pump, and the outlet of the first heat medium pipeline is connected to the low-temperature coolant inlet of the photovoltaic cooling tube. The high-temperature coolant outlet of the shaft seal cooling box is connected to the inlet of the second heat medium pipeline via a second valve and a second water pump, and the outlet of the second heat medium pipeline is connected to the low-temperature coolant inlet of the shaft seal cooling box. The low-temperature liquid outlet of the biogas heater of the biogas fermentation device (such as a biogas fermentation tank) is connected to the inlet of the first refrigerant pipeline. The high-temperature liquid inlet of the biogas heater is connected to the outlet of the first refrigerant pipeline. In one implementation scenario, the biogas heater can be a coil heater, and the coil uses traditional flexible pipes, similar to a small floor heating system. This increases the contact area between the heat exchange portion and the biogas, thereby making it easier to fully utilize the heat of the coil heater. The biogas produced by the biogas fermentation device can be used to generate electricity and can also be used to heat liquid in a boiler. Therefore, in one embodiment, the biogas output of the biogas fermentation device can be connected to the biogas input of the biogas power generation device, and can also be connected to the biogas input of a boiler fueled by biogas. To further integrate the heat of the boiler and the biogas power generation device, in one application scenario, the heat exchange box can also include a third heat medium pipeline, the high-temperature liquid outlet of the coolant tank of the biogas power generation device is connected to the inlet of the third heat medium pipeline, and the outlet of the third heat medium pipeline is connected to the low-temperature liquid inlet of the coolant tank. At the same time, the heat exchange box can also include a fourth heat medium pipeline, which is connected to the above-mentioned boiler via a fourth valve and a fourth water pump.

[0027] In actual applications, the photovoltaic cooling tube, shaft seal cooling box, boiler and biogas power generation device are all the ones that should provide heat in the above heat exchange, and only the biogas heater is the one that absorbs heat. In some cases, such as when one or some of the heat-providing devices cannot provide heat, or may even absorb heat from the biogas heater, it is necessary to isolate the biogas heater from it. However, the pipe settings in the heat exchange box are fixed and cannot be changed at will, so the above isolation cannot be achieved. Therefore, if Figure 1As shown, in another embodiment, a heat exchanger 5 can be added for isolation. The photovoltaic cooling tube 1, shaft seal cooling box 2, and boiler 4 are respectively connected to different heat medium pipelines in the heat exchange box 6. At the same time, the coolant tank 81 of the biogas power generation device 8 is connected to the heat medium pipeline in the heat exchanger 5, and the biogas slurry heater 3 is connected to the refrigerant pipeline in the heat exchanger 5 via the third water pump 31. The refrigerant pipeline outlet of the heat exchange box 6 is connected to the heat medium pipeline of the heat exchanger 5 via the fifth water pump 51. In this way, when the biogas slurry heater 3 requires a small amount of heat, it can only exchange heat with the coolant tank 81. When the biogas slurry heater 3 requires more heat, the heat of the heat medium in the heat exchange box 6 can be absorbed by the heat exchanger 5. When the temperature in the heat medium pipeline in the heat exchange box 6 is not high enough (for example, lower than the temperature of the biogas slurry heater 3), the connection between the heat exchange box 6 and the heat exchanger 5 is cut off to prevent the heat of the biogas slurry heater 3 from being absorbed.

[0028] To achieve optimal heat exchange between the photovoltaic cooling tube 1, the shaft seal cooling box 2, and the biogas slurry heater 3, it is necessary to monitor their respective temperatures so that heat exchange can be controlled accordingly. In one implementation scenario, a first temperature sensor is provided within the photovoltaic cooling tube 1 to detect the temperature of the liquid within the photovoltaic cooling tube 1. A second temperature sensor is provided within the shaft seal cooling box 2 to detect the temperature within the box. Furthermore, a third temperature sensor is provided within the biogas slurry heater 3 to detect the temperature within the biogas slurry heater 3. After obtaining the temperatures of the photovoltaic cooling tube 1, the shaft seal cooling box 2 and the biogas slurry heater 3, in order to keep all three at a suitable temperature (for example, 35°C), in one implementation scenario, a thermal management system for wind-solar-biogas integrated power generation may include a temperature controller (which can be set in a control box outside the heat exchange box 6), which is connected to the first temperature sensor, the second temperature sensor and the third temperature sensor (wired connection or wireless connection) to control the switching status of the first valve 12, the second valve 22, the third valve 31, the first water pump 11, the second water pump 21 and the third water pump 31 according to the detection results of the first temperature sensor, the second temperature sensor and the third temperature sensor.

[0029] Combination of the above Figure 1 The structure of a thermal management system 100 for wind-solar-marine integrated power generation according to an embodiment of the present invention is exemplarily described. Those skilled in the art should understand that the above structure is illustrative rather than restrictive and can be adjusted according to actual needs. Figure 2 This is a flow chart showing the thermal interaction control of a thermal management system 100 for wind-solar-marsh integrated power generation according to an embodiment of the present invention. Figure 2 The thermal interaction control process of a thermal management system 100 for wind-solar-biomass integrated power generation according to an embodiment of the present invention is exemplarily introduced.

[0030] like Figure 2 As shown, in order to keep the photovoltaic cooling tube 1, the shaft seal cooling box 2 and the biogas liquid heater 3 at a suitable temperature (for example, 35°C), in one embodiment, the temperature controller will control the switching status of the above-mentioned valves and water pumps according to the following process. At step S201, the thermal management system performs a self-test: open the above-mentioned first valve 12, the second valve 22, the third valve 31, the first water pump 11, the second water pump 21, the third water pump 31, the fourth water pump 41 and the fifth water pump 51, and close them after two seconds to check whether they can operate normally. At step S202, it is determined whether the temperature of the liquid in the biogas heater 3 is greater than 40°C. If so, the biogas heater 3 does not need to perform thermal interaction. Therefore, the process proceeds to step S203, i.e., closing the first valve 12, the second valve 22, the third valve 31, the first water pump 11, the second water pump 21, the third water pump 31, the fourth water pump 41 and the fifth water pump 51; if not, the biogas heater 3 needs to perform thermal interaction, so the process proceeds to step S204, i.e., judging whether the temperature of the liquid in the biogas heater 3 is less than 35°C; if so, the process proceeds to step S205, i.e., turning on the fifth water pump 51, which means that the biogas heater 3 needs to absorb heat from the photovoltaic cooling tube 1 and / or the shaft seal cooling box 2 and / or the boiler 4.

[0031] At step S206, it is determined whether the temperature of the photovoltaic cooling tube 1 is greater than or equal to the temperature of the shaft seal cooling box 2, and whether the temperature of the photovoltaic cooling tube 1 is greater than 45°C; if so, the photovoltaic cooling tube 1 is involved in thermal interaction, while the shaft seal cooling box 2 does not need to participate in thermal interaction, so the process proceeds to step S207, opens the first water pump 11, the first valve 12, and the third valve 31, and closes the second water pump 21, the second valve 22, the fourth water pump 41, and the fourth valve 42. If not, the photovoltaic cooling tube 1 does not need to participate in thermal interaction, but the shaft seal cooling box 2 does, so the process proceeds to step S208, closes the first water pump 11 and the first valve 12, and then proceeds to step S209, determines whether the temperature of the shaft seal cooling box 2 is greater than or equal to the temperature of the biogas heater 3, and whether the temperature of the shaft seal cooling box 2 is greater than 45°C. If so, the shaft seal cooling box 2 is involved in the thermal interaction, i.e., the process proceeds to step S210, where the second water pump 21, second valve 22, and third valve 31 are turned on, and the fourth water pump 41 and first water pump 11 are turned off. If not, the shaft seal cooling box 2 is not required to participate in the thermal interaction, so the process proceeds to step S211, where the second water pump 21 and second valve 22 are turned off, and the process proceeds to step S212, where it is determined whether the temperature of boiler 4 is greater than or equal to that of biogas heater 3, and whether the temperature of boiler 4 is greater than 45°C. If so, heat is provided to biogas heater 3 via boiler 4, so the process proceeds to step S213, where the fourth water pump 41, fourth valve 42, and third valve 31 are turned on, and the first water pump 11 and second water pump 21 are turned off. If not, the heat exchange box 6 is not required to provide heat to heat exchanger 5, so the process proceeds to step S214, where the fourth water pump 41, fifth water pump 51, and fourth valve 42 are turned off.

[0032] In one embodiment, the biogas output port of the biogas fermentation tank can be connected to a biogas storage tank, which is used to store fermented biogas. The storage tank typically covers an area of ​​several to several dozen acres. A roof can be installed above the biogas storage tank, covered with a UV-resistant and anti-aging sealing film (e.g., black film) to seal the biogas storage tank. This reduces the risk of biogas leakage and provides insulation, reducing heat loss from the liquid within the biogas storage tank and increasing biogas fermentation yields. Photovoltaic power generation components can be installed above the sealing film and in other unused areas around the biogas storage tank to increase land utilization. Wind turbines can also be installed along the embankment surrounding the biogas storage tank, increasing the dam's carrying capacity, reducing land use area, and increasing unit land utilization. In specific implementation, a flat biogas dam can be excavated underground to serve as the biogas storage tank. A black film storage system can be installed at the bottom and around the biogas dam. Color-coated steel tiles with insulation cotton can be installed on the top of the biogas dam. A photovoltaic power generation system can be installed on the color-coated steel tiles, in the green area, and on the open space surrounding the biogas dam.

[0033] Combination of the above Figure 2An exemplary description is given of the thermal interaction control process of a thermal management system 100 for wind-solar-marine integrated power generation according to an embodiment of the present invention. Those skilled in the art should understand that the above process is exemplary rather than restrictive and can be adjusted according to actual needs. Figure 3 1 is a schematic diagram showing a power output control module 300 according to an embodiment of the present invention. Figure 3 The power output control module 300 according to the embodiment of the present invention is exemplarily described.

[0034] In one application scenario, the biogas output end of the biogas fermentation device is connected to the biogas input end of the biogas power generation device 8 so as to generate electricity through the produced biogas. Photovoltaic power generation devices cannot generate electricity in weather or time periods without the sun. Power generation is more concentrated in sunny weather, which can easily put pressure on the power grid. Wind power generation devices cannot generate electricity when there is little wind or no wind. When the wind is strong or in bad weather, the power generation increases instead, which can also easily put pressure on the power grid. The biogas power generation device 8 adopts an internal combustion engine mode. In addition to being restricted by the amount of biogas, it is more stable, controllable and adjustable than wind and photovoltaic power generation. Therefore, it can balance the photovoltaic power generation device and the wind power generation device.

[0035] In order to further prevent the drastic changes in each power generation device in a short period of time from causing an impact on the external power system. In one embodiment, the above-mentioned thermal management system for wind, solar and biogas integrated power generation also includes a power management controller and a power storage device. The power management controller is connected to the power-consuming load, the power storage device, the DC load and the inverter, and the output end of the inverter is connected to the AC load. The biogas power generation device 8, the photovoltaic power generation device and the wind power generation device are all connected to the power management controller. The power management controller decides whether to directly transmit the power output of each power generation device to the power-consuming load or to the power storage device based on the intensity of the power output of each power generation device. The output fluctuation problem of the three is adjusted and buffered to make the power grid more stable. The power storage device can use lithium iron phosphate batteries or hydrogen chemical energy, lithium batteries, etc. to store electrical energy, act as a buffer to buffer power shocks, reduce the pressure on the power grid during period, and thus increase safety. At the same time, it can also release electrical energy when there is a power shortage.

[0036] The present invention mainly relies on the respective characteristics of light, wind and biogas power generation, and now adopts a complementary mode of the three, connecting the wind power generation shaft seal coolant (heat dissipation), the photovoltaic power generation coolant, and the exhaust of the biogas generator with a heat exchanger 5, which has the following technical effects: 1. Lowering the temperature of the photovoltaic panel, making the photovoltaic power generation efficiency higher. 2. Reducing the wear of the wind power shaft and increasing the service life. 3. Increasing the temperature of the biogas anaerobic fermentation tank and adjusting it to reach the optimal fermentation temperature, so that the biogas production is increased and more stable. Reduce the system's heat energy loss and reduce the fuel consumption of the boiler 4 that provides heat energy to the system. The heat energy between various power generation devices is complementary and circulated to increase the efficiency of each system. The present invention combines the positions of wind, light and biogas, generates biogas in the biogas dam, installs photovoltaics on the dam, and uses wind power generation at the dam as the basis. Photovoltaic power generation, wind power generation, and biogas power generation are connected to the storage device, and the storage device stabilizes the power supply and sends it to the power grid or user end through the inverter.

[0037] It should be noted that although the operations of the present method are described in a particular order in the accompanying drawings, this does not require or imply that the operations must be performed in that particular order, or that all of the operations shown must be performed to achieve the desired results. Rather, the steps depicted in the flowcharts may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into a single step, and / or a single step may be broken down into multiple steps.

[0038] It should be understood that when the terms "first," "second," "third," and "fourth," etc. are used in the claims, specification, and drawings of the present invention, they are only used to distinguish different objects, rather than to describe a specific order. The terms "comprise" and "comprising" used in the specification and claims of the present invention indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0039] It should also be understood that the terminology used in this specification is for the purpose of describing specific embodiments only and is not intended to limit the present invention. As used in the specification and claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should further be understood that the term "and / or" as used in the specification and claims refers to any and all possible combinations of one or more of the associated listed items, including and including these combinations.

[0040] Although the embodiments of the present invention are as described above, the contents are only examples used to facilitate understanding of the present invention and are not intended to limit the scope and application scenarios of the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention, but the scope of patent protection of the present invention shall still be based on the scope defined by the attached claims.

Claims

1. A thermal management system for wind, solar and biogas integrated power generation, which is used to perform thermal interaction between photovoltaic cooling pipes of photovoltaic power generation devices, shaft seal cooling boxes of wind power generation devices and biogas fermentation tanks of biogas fermentation devices, characterized in that: include: A first heat medium pipeline is connected to the photovoltaic cooling pipe via a first valve; a second heat medium pipeline is connected to the shaft seal cooling box via a second valve; a first refrigerant pipeline is connected to the biogas slurry heater of the biogas slurry fermentation tank via a third valve; a first temperature sensor for detecting the temperature inside the photovoltaic cooling tube; a second temperature sensor for detecting the temperature inside the shaft seal cooling box; and a third temperature sensor for detecting the temperature inside the biogas slurry heater; as well as a temperature controller connected to the first temperature sensor, the second temperature sensor, and the third temperature sensor to control the on / off states of the first valve, the second valve, and the third valve according to detection results of the first temperature sensor, the second temperature sensor, and the third temperature sensor; a heat exchange box, in which the first heat medium pipeline, the second heat medium pipeline, and the first refrigerant pipeline are arranged, and the heat exchange box is used to achieve thermal exchange; It also includes a heat exchanger, which connects the photovoltaic cooling tube, the shaft seal cooling box, and the boiler to different heat medium pipelines in the heat exchange box respectively, and at the same time connects the coolant tank of the biogas power generation device to the heat medium pipeline in the heat exchanger, and the biogas liquid heater is connected to the refrigerant pipeline in the heat exchanger through the third water pump; the refrigerant pipeline outlet of the heat exchange box is connected to the heat medium pipeline of the heat exchanger through the fifth water pump.

2. The thermal management system for wind, solar and biomass integrated power generation according to claim 1, characterized in that: It also includes a third heat medium pipeline, which is connected to the coolant tank of the biogas power generation device.

3. The thermal management system for wind, solar and biomass integrated power generation according to claim 2, characterized in that: The system also includes a fourth heat medium pipeline connected to the boiler via a fourth valve.

4. The thermal management system for wind, solar and biomass integrated power generation according to claim 3, characterized in that: The third heat medium pipeline and the fourth heat medium pipeline are arranged in the heat exchange box.

5. The thermal management system for wind, solar and biomass integrated power generation according to any one of claims 1 to 4, characterized in that: The biogas slurry output end of the biogas slurry fermentation tank is connected to a biogas slurry storage tank, and the biogas slurry storage tank is used to store the fermented biogas slurry.

6. The thermal management system for wind, solar and biomass integrated power generation according to claim 5, characterized in that: A roof is provided above the biogas slurry storage tank, and a photovoltaic power generation component is provided above the roof.

7. The thermal management system for wind, solar and biomass integrated power generation according to claim 6, characterized in that: The wind power generation device is arranged along the circumference of the biogas slurry storage tank.

8. The thermal management system for wind, solar and biomass integrated power generation according to claim 7, characterized in that: The biogas output end of the biogas fermentation device is connected to the biogas input end of the biogas power generation device.

9. The thermal management system for wind, solar and biomass integrated power generation according to claim 8, characterized in that: It also includes a power management controller and a power storage device. The power management controller is connected to the power consumption load and the power storage device. The biogas power generation device, the photovoltaic power generation device and the wind power generation device are all connected to the power management controller.

10. The thermal management system for wind, solar and biomass integrated power generation according to claim 9, characterized in that: The biogas slurry storage tank is covered with a closing film for closing the biogas slurry storage tank, and the top of the closing film is located between the roof and the photovoltaic power generation assembly.

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