A modular geothermal power generation system

Abstract

The present invention relates to the technical field of geothermal power generation, and particularly relates to a modular geothermal power generation system. It includes: multiple groups of thermovoltaic power generation modules, a hot water supply system, and a cold water supply system; the thermovoltaic power generation module includes at least two heat exchangers, the heat exchangers are arranged adjacent to each other at intervals, and the two adjacent heat exchangers are respectively: a hot heat exchanger and a cold heat exchanger. A plurality of thermoelectric modules for thermovoltaic power generation are arranged between the two heat exchangers. The hot water supply system is connected to the hot heat exchanger, and the cold water supply system is connected to the cold heat exchanger. By arranging the hot heat exchanger and the cold heat exchanger which are oppositely arranged to form a hot end and a cold end of the groove, and arranging a thermoelectric module between them, the whole is modular, and the number of used modules can be adjusted according to requirements, which is convenient for maintenance and assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal power generation, and in particular to a modular geothermal power generation system. Background Art

[0002] Most of the existing geothermal power generation systems convert thermal energy into mechanical energy and then into electrical energy. Inevitably, there are disadvantages such as mechanical losses and pipeline scaling in the process, and the overall system is relatively complex and urgently needs to be optimized.

[0003] Thermoelectric materials are a type of functional materials that can achieve direct thermoelectric conversion. The internal carriers in them move directionally under the action of temperature difference, and a stable potential difference is formed at both ends of the material. Specifically, when different temperatures are applied to both ends of the thermoelectric material, the Seebeck effect causes the charge distribution inside the thermoelectric material to change, generating a stable potential difference and thus generating an electric current. The thermoelectric power generation technology of thermoelectric materials breaks through the traditional energy conversion path of thermal energy - mechanical energy - electrical energy, avoids the intermediate process of mechanical work, realizes direct thermoelectric conversion, and has unique advantages such as simple operation, no mechanical energy loss, stable and reliable, green and clean.

[0004] At present, some R & D teams have designed geothermal thermovoltaic generators and verified the feasibility of applying thermoelectric power generation technology to medium and low-temperature geothermal power generation. However, the installed capacity of their equipment is limited. Secondly, the overall design leads to a large volume of the equipment and poor scalability, and it is not convenient for later operation and maintenance, making it difficult to achieve large-scale engineering applications. Summary of the Invention

[0005] The purpose of the present invention is to provide a modular geothermal power generation system for the deficiencies of the existing technology. The modular geothermal power generation system has good scalability and is convenient for assembly and maintenance.

[0006] A modular geothermal power generation system includes: multiple thermovoltaic power generation modules;

[0007] A hot water supply system;

[0008] A cold water supply system;

[0009] Each thermovoltaic power generation module includes at least two heat exchangers, which are arranged at intervals adjacent to each other. The two adjacent heat exchangers are respectively a hot heat exchanger and a cold heat exchanger. A plurality of thermoelectric modules for thermovoltaic power generation are provided between the two heat exchangers. The hot water supply system is connected to the hot heat exchanger, and the cold water supply system is connected to the cold heat exchanger.

[0010] Furthermore, at least two thermovoltaic power generation modules form a power generation group. The heat exchanger includes a heat dissipation housing, and a water inlet interface and a water outlet interface are respectively provided at both ends of the heat dissipation housing. The hot water supply system and the cold water supply system are respectively arranged on the left and right sides of the thermovoltaic power generation module. The hot water supply system includes a hot water input pipe and a hot water output pipe, and the cold water supply system includes a cold water input pipe and a cold water output pipe;

[0011] Between two adjacent thermovoltaic power generation modules in the power generation group, the heat exchangers and cold exchangers are correspondingly connected through pipes, and the heat exchangers and cold exchangers of each thermovoltaic power generation module are correspondingly connected in series. The thermovoltaic power generation modules located on both sides in the power generation group are the main thermovoltaic power generation module and the auxiliary thermovoltaic power generation module. The water inlet interface of the heat exchanger of the main thermovoltaic power generation module is connected to the hot water input pipe through a pipe, and the water outlet interface of the heat exchanger of the auxiliary thermovoltaic power generation module is connected to the hot water output pipe through a pipe. The water inlet interface of the cold exchanger of the main thermovoltaic power generation module is connected to the cold water input pipe through a pipe, and the water outlet interface of the cold exchanger of the auxiliary thermovoltaic power generation module is connected to the cold water output pipe through a pipe.

[0012] Furthermore, the thermovoltaic power generation module includes 2K + 1 heat exchangers, where K is a natural number; among them, K heat exchangers are heat exchangers; K + 1 heat exchangers are cold exchangers, and the heat exchangers are arranged between two adjacent cold exchangers; it also includes a fixing structure for fixing the heat exchangers. The fixing structure has two clamping plates, and the two clamping plates are fixedly connected through a connecting piece.

[0013] Furthermore, the heat dissipation housing includes a cover plate and a bottom shell. The bottom shell includes a bottom plate, and multiple convex ribs are provided at intervals in the middle of the bottom plate. The convex ribs are arranged along the length direction of the heat exchanger, dividing the internal space of the heat exchanger into multiple water channels. The water inlet interface and the water outlet interface are respectively arranged at the lower end on the left side and the upper end on the right side of the heat dissipation housing.

[0014] Preferably, the left side plate and the right side plate of the bottom shell are both inclined; the distance between the left end face of the convex rib and the left side plate gradually increases from top to bottom, and the distance between the right end face of the convex rib and the right side plate gradually decreases from top to bottom.

[0015] Furthermore, the modular geothermal power generation system further includes a bracket for fixing the thermovoltaic power generation module; the bracket includes a bottom plate, and a support plate is provided in the middle of the bottom plate. Multiple spaced load-bearing plates are respectively connected to both side surfaces of the support plate, and the thermovoltaic power generation module is fixed to the load-bearing plates.

[0016] Further, the two thermovoltaic power generation modules form a power generation group. The hot water input pipe and the hot water output pipe are located at the front end and the rear end on one side of the thermovoltaic power generation module, and the cold water input pipe and the cold water output pipe are located at the front end and the rear end on the other side of the thermovoltaic power generation module. Multiple horizontally arranged hot water input branch pipes are connected to the side of the hot water input pipe, and the hot water input branch pipes are connected to the water inlet interface of the heat exchanger through pipelines. Multiple horizontally arranged hot water output branch pipes are connected to the hot water output pipe, and the hot water output branch pipes are connected to the water outlet interface of the heat exchanger through pipelines; the hot water input branch pipes and the hot water output branch pipes are arranged alternately; multiple horizontally arranged cold water input branch pipes are connected to the side of the cold water input pipe, and the cold water input branch pipes are connected to the water inlet interface of the cold radiator through pipelines. Multiple horizontally arranged cold water output branch pipes are connected to the cold water output pipe, and the cold water output branch pipes are connected to the water outlet interface of the cold radiator through pipelines; the cold water input branch pipes and the cold water output branch pipes are arranged alternately.

[0017] Further, it further includes a box body. The thermovoltaic power generation module, the cold water supply system, the hot water supply system and the bracket are all arranged inside the box body, and interfaces connected to the cold water supply system and the hot water supply system are arranged on the outer side of the box body.

[0018] Further, a control system is arranged at the upper end of the box body, and the control system is used to monitor the working states of the cold water supply system, the hot water supply system and the thermovoltaic power generation module.

[0019] The beneficial effects of the present invention: By setting the hot end and the cold end of the heat exchanger and the cold heat exchanger in a relatively arranged manner, and arranging the thermoelectric module therebetween, the whole is modularized, and the number of uses can be adjusted according to needs, which is convenient for maintenance and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of this embodiment.

[0021] Figure 2 is Figure 1 a schematic diagram excluding the box body and the control system.

[0022] Figure 3 is Figure 2 a schematic diagram of another perspective.

[0023] Figure 4 is a schematic diagram of the thermovoltaic power generation module.

[0024] Figure 5 is Figure 4 a schematic exploded view.

[0025] Figure 6 is Figure 3 a partial exploded view excluding the thermovoltaic power generation module.

[0026] Figure 7 It is a schematic structural diagram of a heat exchanger.

[0027] Figure 8 It is Figure 7 a schematic cross-sectional view of

[0028] Figure 9 a schematic diagram of the cooperation of a power generation group with a thermovoltaic power generation module and a hot water supply system.

[0029] Figure 10 It is Figure 1 a schematic exploded view of

[0030] Figure 11 a schematic diagram of a power generation group.

[0031] Reference numerals include:

[0032] 1 - control system; 2 - box body; 3 - thermovoltaic power generation module; 4 - cold water supply system; 5 - hot water supply system; 6 - bracket;

[0033] 12 - DC electronic load; 13 - programmable logic controller; 14 - touch display screen;

[0034] 31 - heat exchanger; 32 - thermoelectric module; 33 - heat dissipation housing; 34 - heat sink; 36 - clamping plate; 37 - connecting piece; 311 - water inlet interface; 312 - water outlet interface; 331 - rib; 332 - right side plate; 333 - water chute; 38 - main thermovoltaic power generation module; 39 - auxiliary thermovoltaic power generation module;

[0035] 41 - cold water output pipe; 42 - cold water input branch pipe; 43 - cold water output branch pipe; 44 - cold water input pipe;

[0036] 51 - hot water input branch pipe; 52 - hot water output branch pipe; 53 - hot water output pipe; 54 - hot water input pipe. Embodiment

[0037] The present invention will be described in detail below with reference to the accompanying drawings. As Figures 1 to 11 shown.

[0038] Example: Refer to Figures 1 to 5 , a modular geothermal power generation system, which includes: multiple groups of thermovoltaic power generation modules 3;

[0039] hot water supply system 5;

[0040] cold water supply system 4;

[0041] The thermovoltaic power generation module 3 includes at least two heat exchangers 31, which are arranged adjacent to each other at intervals. The two adjacent heat exchangers 31 are respectively a hot heat exchanger 31 and a cold heat exchanger 31. A plurality of thermoelectric modules 32 for thermovoltaic power generation are provided between the two heat exchangers 31. The hot water supply system 5 is connected to the hot heat exchanger 31, and the cold water supply system 4 is connected to the cold heat exchanger 31.

[0042] When implementing this technical solution, by modularizing the thermovoltaic power generation module 3, this technical solution can set the corresponding number of thermovoltaic power generation modules 3 according to requirements. In specific implementation, the thermoelectric modules 32 of each group of thermovoltaic power generation modules are all connected to the power generation circuit through wires, and the generated electric energy is output externally through the power generation circuit. The power generation circuit is a prior art and is not the innovation point of the application technology, so it will not be elaborated here. During implementation, the hot water supply system 5 provides hot water to the hot heat exchanger 31, and the cold water supply system 4 provides cold water to the cold heat exchanger 31. A hot end and a cold end are formed on both sides of the thermoelectric module 32. A potential difference is generated between the hot end and the cold end to form electric energy, and it is output externally. By modularizing the design of the thermoelectric module 32, its application has better expandability and is also convenient for assembly and maintenance. Preferably, flexible heat sinks 34 are provided on both sides of the thermoelectric module and are in contact with the heat exchanger through the heat sinks 34.

[0043] Further, at least two of the thermovoltaic power generation modules 3 form a power generation group. The heat exchanger 31 includes a heat dissipation housing 33, and a water inlet interface 311 and a water outlet interface 312 are respectively provided at both ends of the heat dissipation housing 33. The hot water supply system 5 and the cold water supply system 4 are respectively arranged on the left and right sides of the thermovoltaic power generation module 3. The hot water supply system 5 includes a hot water input pipe 54 and a hot water output pipe 53, and the cold water supply system 4 includes a cold water input pipe 44 and a cold water output pipe 41;

[0044] Between two adjacent thermovoltaic power generation modules 3 in the power generation group, the hot heat exchanger 31 and the cold heat exchanger 31 are correspondingly connected through pipes, and the hot heat exchangers 31 and the cold heat exchangers 31 of each thermovoltaic power generation module 3 are correspondingly connected in series; see Figure 11 ; The thermovoltaic power generation modules 3 located on both sides in the power generation group are the main thermovoltaic power generation module 38 and the auxiliary thermovoltaic power generation module 39. Here, both sides refer to the outermost sides. When the power generation group is distributed vertically, the two groups of thermovoltaic power generation modules 3 located at the bottommost and topmost are the main thermovoltaic power generation module 38 and the auxiliary thermovoltaic power generation module 39. When the power generation group is horizontally arranged, the two groups of thermovoltaic power generation modules 3 located at the outermost sides are the main thermovoltaic power generation module 38 and the auxiliary thermovoltaic power generation module 39.

[0045] The water inlet interface 311 of the heat exchanger of the main thermovoltaic power generation module 38 is connected to the hot water input pipe 54 through a pipeline, and the water outlet interface 312 of the heat exchanger of the secondary thermovoltaic power generation module 39 is connected to the hot water output pipe 53 through a pipeline; the water inlet interface 311 of the cold exchanger of the main thermovoltaic power generation module 38 is connected to the cold water input pipe 44 through a pipeline, and the water outlet interface 312 of the cold exchanger of the secondary thermovoltaic power generation module 39 is connected to the cold water output pipe 41 through a pipeline. See Figure 2 , Figure 3 , Figure 11 .

[0046] In practical applications, a thermovoltaic power generation module 3 is directly connected to the cold water supply system 4 and the hot water supply system 5. Due to the relatively fast flow rate of the water, the amount of heat exchange is relatively small; as a result, the temperature changes of the hot water and cold water are relatively small, and the efficiency of thermovoltaic conversion is relatively low; if the flow rate of the water is reduced, the temperature difference between the cold exchanger 31 and the heat exchanger 31 will become smaller, reducing the power of thermovoltaic conversion; if the heat exchanger 31 is extended, the volume of the entire device will become larger; in order to balance the above problems well, the applicant has developed a series connection method, in which at least two thermovoltaic power generation modules 3 are connected in series through pipelines, and the pipelines can be flexible corrugated pipes, etc. In this embodiment, two thermovoltaic power generation modules 3 are connected in series, and the two thermovoltaic power generation modules 3 are arranged vertically. For the convenience of understanding, the upper thermovoltaic power generation module 3 is the secondary thermovoltaic power generation module 39, and the lower thermovoltaic power generation module 3 is the main thermovoltaic power generation module 38.

[0047] The water inlet interface 311 on the right side of the heat exchanger 31 of the main thermovoltaic power generation module 38 is connected to the hot water input pipe 54 through a straight pipeline, and the water outlet interface 312 on the left side of the heat exchanger 31 of the main thermovoltaic power generation module 38 is connected to the water inlet interface 311 on the left side of the heat exchanger 31 of the secondary thermovoltaic power generation module 39 through a U-shaped pipeline; the water outlet interface 312 on the right side of the heat exchanger of the secondary thermovoltaic power generation module 39 is connected to the hot water output pipe through a straight pipeline, forming a hot water circulation.

[0048] The water inlet interface 311 on the left side of the cold exchanger 31 of the main thermovoltaic power generation module 38 is connected to the cold water input pipe 44 through a straight pipeline, and the water outlet interface 312 on the right side of the cold exchanger 31 of the main thermovoltaic power generation module 38 is connected to the water inlet interface 311 on the right side of the cold exchanger 31 of the secondary thermovoltaic power generation module 39 through a U-shaped pipeline; the water outlet interface 312 on the left side of the cold exchanger 31 of the secondary thermovoltaic power generation module 39 is connected to the cold water output pipe 41 through a straight pipeline, forming a cold water circulation.

[0049] For the convenience of pipeline connection, when adjacent thermovoltaic power generation modules 3 are connected in series, the outlet of the heat exchanger 31 of one thermovoltaic power generation module 3 and the inlet of the heat exchanger 31 of another thermovoltaic power generation module 3 are located on the same side and are connected by a pipeline; the outlet of the cold exchanger 31 of one thermovoltaic power generation module 3 and the outlet of the cold exchanger 31 of another thermovoltaic power generation module 3 are located on the same side and are connected by a pipeline.

[0050] See Figure 9 ; when there are 2N + 1 (such as 3) thermovoltaic power generation modules 3 connected in series, the cold water input pipe 44 and the cold water output pipe 41 are located on both sides of the thermovoltaic power generation module 3, and the hot water output pipe 53 and the hot water input pipe 54 are also located on both sides of the thermovoltaic power generation module 3. At this time, the flow of hot water and the flow of cold water both present an S-shaped line.

[0051] Secondly, in the same thermovoltaic power generation module 3, the cold water flow path and the hot water flow path adopt two opposite routes, with hot water flowing from left to right and cold water flowing from right to left, or vice versa; so that the relative temperature difference fluctuations between the cold exchangers 31 and the heat exchangers 31 on both sides of the thermovoltaic power generation module 3 are not large, and the working states of the thermoelectric modules 32 in the thermovoltaic power generation module 3 are basically the same, which is beneficial to the collection of electric energy.

[0052] Furthermore, the thermovoltaic power generation module 3 includes 2K + 1 heat exchangers 31, where K is a natural number; among them, K heat exchangers 31 are heat exchangers 31; K + 1 heat exchangers 31 are cold exchangers 31, and the heat exchangers 31 are arranged between two adjacent cold exchangers 31; it also includes a fixing structure for fixing the heat exchangers 31. The fixing structure has two clamping plates 36, and the two clamping plates 36 are fixedly connected by a connecting member 37.

[0053] In specific implementation, the thermovoltaic power generation module is arranged between the cold exchanger 31 and the heat exchanger 31; if the outermost heat exchanger 31 is a heat exchanger 31, then this heat exchanger 31 will exchange heat with the outside world and a part of the heat will be lost; in order to maximize the utilization of heat, the cold exchangers 31 are arranged on the outermost sides on both sides, and the heat exchangers 31 are arranged in the middle. K can be 1, 2, 3, 4, 5, etc.

[0054] See Figure 6 、 Figure 7 ; furthermore, the heat dissipation housing 33 includes a cover plate and a bottom case. The bottom case includes a bottom plate, and multiple convex ribs 331 are arranged at intervals in the middle of the bottom plate. The convex ribs 331 are arranged along the length direction of the heat exchanger 31, dividing the internal space of the heat exchanger 31 into multiple flowing water grooves 333. The water inlet interface 311 and the water outlet interface 312 are respectively arranged at the lower end on the left side and the upper end on the right side of the heat dissipation housing 33.

[0055] Preferably, the left side plate and the right side plate 332 of the bottom shell are both inclined; the distance between the left end face of the convex rib and the left side plate gradually increases from top to bottom, and the distance between the right end face of the convex rib and the right side plate 332 gradually decreases from top to bottom.

[0056] To reduce the turbulence inside the heat exchanger 31, convex ribs 331 are provided in the heat dissipation shell 33, and a plurality of water channels 333 are formed; since the width of the heat exchanger 31 is greater than the width of the interface, when cold water or hot water enters from the interface, if the heat exchanger 31 is made into a regular rectangle, different flow velocity layers will be formed inside the heat exchanger 31, resulting in a temperature difference on the surface of the heat exchanger 31, which affects the working efficiency of the thermoelectric power generation module; the inventor has also designed a similar heat exchanger 31 before, by designing the ends of the convex ribs 331 with different radian to adjust the flow velocity of the water channels 333; but this brings difficulties to the production; for the convenience of production and to balance the flow velocity of each water channel 333, the left side plate and the right side plate 332 of the bottom plate are set to be inclined, and the inclination angle is between 15 and 30 degrees; after the left side plate and the right side plate are set to be inclined, the water pressure at the left end and the right end of the heat exchanger 31 is adjusted, so that the pressure differences at the left and right ends of all the water channels 333 are equal or approximately equal, so that the water flow velocities of the water channels 333 are approximately equal, and further the temperature of the heat exchanger 31 is kept consistent in the width direction, linearly different in the length direction, and the temperature difference between the cold heat exchanger 31 and the hot heat exchanger 31 is equal or approximately equal in the length direction, so that the thermoelectric power generation module works stably.

[0057] Secondly, the convex ribs 331 can also play the role of structurally strengthening the heat exchanger. The temperature of the heat exchanger gradually rises or falls in the length direction. The heat exchanger is generally made of metal material, and its thermal expansion and contraction scales are different, which easily causes large internal stress to be formed inside, resulting in deformation of the cover plate and the bottom shell, affecting the thermal contact with the thermoelectric module; after adding the convex ribs 331, the overall strength is improved, and deformation can be reduced or avoided.

[0058] See Figure 4 Furthermore, the modular geothermal power generation system further includes a bracket 6 for fixing the thermoelectric power generation module 3; the bracket 6 includes a bottom plate, a support plate is provided in the middle of the bottom plate, and a plurality of spaced load-bearing plates are respectively connected to both side surfaces of the support plate, and the thermoelectric power generation module 3 is fixed to the load-bearing plates.

[0059] Setting the bracket 6 can facilitate the fixing of the thermoelectric power generation module 3.

[0060] Further, the two thermovoltaic power generation modules 3 form a power generation group. The hot water input pipe 54 and the hot water output pipe are located at the front end and the rear end on one side of the thermovoltaic power generation module 3. The cold water input pipe 44 and the cold water output pipe 41 are located at the front end and the rear end on the other side of the thermovoltaic power generation module 3. Multiple horizontally arranged hot water input branch pipes 51 are connected to the side of the hot water input pipe 54. The hot water input branch pipes 51 are connected to the water inlet interface 311 of the heat exchanger 31 through pipes. The hot water output pipe is connected to multiple horizontally arranged hot water output branch pipes 52. The hot water output branch pipes 52 are connected to the water outlet interface 312 of the heat exchanger 31 through pipes. The hot water input branch pipes 51 and the hot water output branch pipes 52 are arranged alternately. Multiple horizontally arranged cold water input branch pipes 42 are connected to the side of the cold water input pipe 44. The cold water input branch pipes 42 are connected to the water inlet interface 311 of the cold radiator through pipes. The cold water output pipe 41 is connected to multiple horizontally arranged cold water output branch pipes 43. The cold water output branch pipes 43 are connected to the water outlet interface 312 of the cold radiator through pipes. The cold water input branch pipes 42 and the cold water output branch pipes 43 are arranged alternately.

[0061] Taking two thermovoltaic power generation modules 3 as a power generation group makes the cold water input pipe 44 and the cold water output pipe 41 located on the same side, and the hot water input pipe 54 and the hot water output pipe 53 located on the same side, which is convenient for management. Secondly, by alternately arranging the cold water input branch pipes 42 and the cold water output branch pipes 43, and alternately arranging the hot water input branch pipes 51 and the hot water output branch pipes 52, the space is reasonably utilized.

[0062] See Figure 1 , further, it also includes a box body 2. The thermovoltaic power generation module 3, the cold water supply system 4, the hot water supply system 5 and the bracket 6 are all arranged in the box body 2. Interfaces connected to the cold water supply system 4 and the hot water supply system 5 are provided on the outer side of the box body 2.

[0063] To protect the normal operation of the thermovoltaic power generation module 3 and prevent the cold water supply system 4 and the hot water supply system 5 from being interfered by the outside, this technical solution sets up the box body 2 and also sets up interfaces to connect with the cold water supply system 4 and the hot water supply system 5 to facilitate the introduction and outflow of hot water and cold water. Geothermal water is used for hot water, and river water can be used for cold water.

[0064] See Figure 1 and Figure 10 ; further, a control system 1 is provided at the upper end of the box body 2. The control system 1 is used to monitor the working states of the cold water supply system 4, the hot water supply system 5 and the thermovoltaic power generation module 3.

[0065] Preferably, the monitoring system includes: a DC electronic load 12, a programmable logic controller 13 and a touch display screen 14.

[0066] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A modular geothermal power generation system, characterized in that: It includes: Multiple groups of thermovoltaic power generation modules; Hot water supply system; Cold water supply system; The thermovoltaic power generation module includes at least two heat exchangers, which are arranged at adjacent intervals. The two adjacent heat exchangers are respectively a hot heat exchanger and a cold heat exchanger. A plurality of thermoelectric modules for thermovoltaic power generation are provided between the two heat exchangers. The hot water supply system is connected to the hot heat exchanger, and the cold water supply system is connected to the cold heat exchanger; At least two of the thermovoltaic power generation modules form a power generation group. The heat exchanger includes a heat dissipation housing. Water inlet interfaces and water outlet interfaces are respectively provided at both ends of the heat dissipation housing. The hot water supply system and the cold water supply system are respectively arranged on the left and right sides of the thermovoltaic power generation module. The hot water supply system includes a hot water input pipe and a hot water output pipe. The cold water supply system includes a cold water input pipe and a cold water output pipe; Between two adjacent thermovoltaic power generation modules in the power generation group, the hot heat exchangers and the cold heat exchangers are correspondingly connected through pipes, and the hot heat exchangers and the cold heat exchangers of each thermovoltaic power generation module are correspondingly connected in series. The thermovoltaic power generation modules located on both sides in the power generation group are the main thermovoltaic power generation module and the auxiliary thermovoltaic power generation module. The water inlet interface of the hot heat exchanger of the main thermovoltaic power generation module is connected to the hot water input pipe through a pipe, and the water outlet interface of the hot heat exchanger of the auxiliary thermovoltaic power generation module is connected to the hot water output pipe through a pipe. The water inlet interface of the cold heat exchanger of the main thermovoltaic power generation module is connected to the cold water input pipe through a pipe, and the water outlet interface of the cold heat exchanger of the auxiliary thermovoltaic power generation module is connected to the cold water output pipe through a pipe; The heat dissipation housing includes a cover plate and a bottom case. The bottom case includes a bottom plate. A plurality of convex ribs arranged at intervals are provided in the middle of the bottom plate. The convex ribs are arranged along the length direction of the heat exchanger, and the internal space of the heat exchanger is divided into a plurality of water channels. The water inlet interface and the water outlet interface are respectively arranged at the lower end on the left side and the upper end on the right side of the heat dissipation housing; The thermovoltaic power generation module includes 2K + 1 heat exchangers, where K is a natural number; among them, K heat exchangers are hot heat exchangers; K + 1 heat exchangers are cold heat exchangers, and the hot heat exchangers are arranged between two adjacent cold heat exchangers; it also includes a fixing structure for fixing the heat exchanger. The fixing structure has two clamping plates, and the two clamping plates are fixedly connected through a connecting piece; The left side plate and the right side plate of the bottom case are both inclined; the distance between the left end face of the convex rib and the left side plate gradually increases from top to bottom, and the distance between the right end face of the convex rib and the right side plate gradually decreases from top to bottom; The two thermovoltaic power generation modules form a power generation group. The hot water input pipe and the hot water output pipe are located at the front end and the rear end on one side of the thermovoltaic power generation module. The cold water input pipe and the cold water output pipe are located at the front end and the rear end on the other side of the thermovoltaic power generation module. Multiple horizontally arranged hot water input branch pipes are connected to the side of the hot water input pipe. The hot water input branch pipes are connected to the water inlet interface of the heat exchanger through pipes. The hot water output pipe is connected to multiple horizontally arranged hot water output branch pipes. The hot water output branch pipes are connected to the water outlet interface of the heat exchanger through pipes. The hot water input branch pipes and the hot water output branch pipes are arranged alternately. Multiple horizontally arranged cold water input branch pipes are connected to the side of the cold water input pipe. The cold water input branch pipes are connected to the water inlet interface of the cold radiator through pipes. The cold water output pipe is connected to multiple horizontally arranged cold water output branch pipes. The cold water output branch pipes are connected to the water outlet interface of the cold radiator through pipes. The cold water input branch pipes and the cold water output branch pipes are arranged alternately. Taking two thermovoltaic power generation modules as a power generation group makes the cold water input pipe and the cold water output pipe located on the same side, and the hot water input pipe and the hot water output pipe located on the same side, which is convenient for management. Secondly, by alternately arranging the cold water input branch pipes and the cold water output branch pipes, and alternately arranging the hot water input branch pipes and the hot water output branch pipes, the space can be reasonably utilized.

2. The modular geothermal power generation system according to claim 1, wherein: The modular geothermal power generation system further includes a bracket for fixing the thermovoltaic power generation module. The bracket includes a bottom plate, a support plate is provided in the middle of the bottom plate, and multiple spaced load-bearing plates are respectively connected to the two side surfaces of the support plate. The thermovoltaic power generation module is fixed to the load-bearing plates.

3. A modular geothermal power generation system according to claim 1, characterized in that: It further includes a box body. The thermovoltaic power generation module, the cold water supply system, the hot water supply system and the bracket are all arranged in the box body, and interfaces connected to the cold water supply system and the hot water supply system are provided on the outer side of the box body.

4. A modular geothermal power generation system according to claim 3, wherein: A control system is provided at the upper end of the box body. The control system is used to monitor the working states of the cold water supply system, the hot water supply system and the thermovoltaic power generation module.

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