Integrated energy pile based on organic Rankine cycle principle and its construction method

Abstract

The present invention relates to the field of underground engineering, and particularly to an integrated energy pile based on the principle of organic Rankine cycle and its construction method. It includes a steel frame; a heat extraction section and a cooling section, the heat extraction section is located below the cooling section, the heat extraction section and the cooling section are formed into an internal closed circulation structure and a heat exchange medium flows inside; the power generation system located in the cooling section includes a generator and an expander fixed in the steel frame, the generator and the expander are driven and connected, the expander is connected to the circulation structure of the cooling section, the heat exchange medium does work in the expander and drives the generator to generate electricity; the water pump is located in the cooling section, the water pump is connected to the circulation structure of the heat extraction section, and then the heat exchange medium inside the heat extraction section is driven to circulate through the water pump. Beneficial effect: the generator and the expander are directly buried in the energy pile, and the power generation system is installed simultaneously when the energy pile is constructed, and the geothermal energy in the soil is utilized, and it can operate automatically throughout the life cycle of the energy pile.

Description

Technical Field

[0001] The present invention relates to the field of underground engineering, and in particular to an integrated energy pile based on the organic Rankine cycle principle and a construction method thereof. Background Art

[0002] An underground energy structure utilizes renewable geothermal energy by embedding heat exchange tubes within underground building structures. The most common underground energy structure is the energy pile, which embeds heat exchange tubes directly into the pile foundation to extract geothermal energy from the soil. Currently, most energy piles are bored and cast-in-place piles, which can only serve as a heat source on their own and require additional heat pump units. These structures also have a low level of integration and require additional construction steps, impacting the normal construction process and limiting the further promotion and utilization of underground energy structures. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an integrated energy pile based on the principle of organic Rankine cycle and its construction method, so as to solve the problem that the existing energy piles use bored cast-in-place piles, which can only be used as heat sources and require additional heat pump units. The degree of integration is low and additional construction steps are required, which affects the normal construction process and limits the further promotion and utilization of underground energy structures.

[0004] The technical solution to achieve the above purpose is:

[0005] The present invention provides an integrated energy pile based on the organic Rankine cycle principle, comprising:

[0006] steel skeleton;

[0007] a heat extraction section and a cooling section installed in the steel frame, the heat extraction section being located below the cooling section, the heat extraction section and the cooling section forming an internally closed circulation structure with a heat exchange medium flowing therein, the cooling section including a second water collector for collecting the heat exchange medium, the heat extraction section including a first water distributor, a condenser being provided on one side of the first water distributor, the condenser extending from one side into the second water distributor and extending from the other side, so that the first water distributor and the second water distributor can exchange heat;

[0008] The power generation system located in the cooling section includes a generator and an expander fixed in the steel frame. The generator is connected to the expander via a drive shaft. The expander is connected to the circulation structure of the cooling section. The heat exchange medium in the cooling section performs work in the expander and drives the generator via the drive shaft to generate electricity. The generator is provided with a terminal block, which is connected to external electrical equipment via a wire.

[0009] A water pump is located in the cooling section, and the water pump is connected to the circulation structure of the heat extraction section, and the inlet end of the water pump is connected to the condenser pipe, and then the water pump drives the heat exchange medium inside the heat extraction section to circulate.

[0010] Furthermore, the heat extraction section includes:

[0011] Two or more vertically arranged first heat exchange tubes are installed in the steel frame, and the upper ends of the first heat exchange tubes are connected to the first water distributor;

[0012] a first water collector connected to the lower end of the first heat exchange tube;

[0013] A first return pipe is connected between the water pump and the first water collector.

[0014] Furthermore, the cooling section further comprises:

[0015] At least two vertically arranged second heat exchange tubes are installed in the steel frame, and the lower ends of the second heat exchange tubes are connected to the second water collector;

[0016] a second water distributor in communication with the upper end of the second heat exchange tube;

[0017] A second reflux pipe is connected between the second water distributor and the second water collector, and the expander is connected to the second reflux pipe.

[0018] Furthermore, the boiling point of the heat exchange medium in the heat extraction section is higher than that of the heat exchange medium in the cooling section, so that the heat exchange medium in the cooling section is more easily vaporized, thereby enabling the heat exchange medium in the gaseous state in the cooling section to perform work inside the expander.

[0019] Furthermore, the steel frame includes:

[0020] At least two first positioning plates are spaced apart from each other;

[0021] At least two vertical ribs are fixedly provided through the first positioning plate.

[0022] Furthermore, it also includes a water pump bracket fixed to the generator, the water pump is fixed to the water pump bracket, and an electric motor connected to the generator is provided in the water pump bracket. The electric energy generated by the generator drives the electric motor, and then drives the water pump to operate.

[0023] The present invention also provides a construction method of an integrated energy pile based on the organic Rankine cycle principle, which specifically includes the following steps:

[0024] S1: Assemble the steel frame;

[0025] S2: Install the heating section and the cooling section in the steel frame so that the heating section is located below the cooling section, and the condenser pipe of the first water distributor of the heating section passes through the second water collector;

[0026] S3: Install the generator and expander in the cooling section, install a transmission shaft between the generator and the expander, and connect the wiring terminals on the generator to the outside world through wires;

[0027] S4: Install the water pump in the cooling section and connect the water pump to the circulation structure of the heat extraction section;

[0028] S5: Inject heat exchange medium into the circulation structure of the heat extraction section and the cooling section.

[0029] Furthermore, the specific installation steps of the heat extraction section are as follows:

[0030] Provide at least two first heat exchange tubes, install the first heat exchange tubes in the steel frame, and connect the upper ends of the first heat exchange tubes to the first water distributor;

[0031] Providing a first water collector, installing the first water collector at the lower end of the first heat exchange tube, and connecting the two;

[0032] A first return pipe is provided and installed between the outlet end of the water pump and the first water collector.

[0033] Furthermore, the specific installation steps of the cooling section are as follows:

[0034] Provide at least two second heat exchange tubes, install the second heat exchange tubes in the steel frame, and connect the lower ends of the second heat exchange tubes to the second water collector;

[0035] Providing a second water separator, installing the second water separator at the upper end of the second heat exchange tube, and connecting the two;

[0036] A second return pipe is provided and installed to connect the second water distributor with the second water collector.

[0037] Furthermore, when installing the water pump, a water pump bracket and an electric motor are provided, the electric motor is mounted on the water pump bracket, the water pump bracket is fixed on the generator, and the electric motor is electrically connected to the generator through a wire;

[0038] Then the water pump is installed on the water pump bracket, and the generator drives the electric motor to operate, thereby causing the water pump to drive the heat exchange working medium in the heat extraction section to circulate.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1) By burying the generator and expander directly in the energy pile, the generator system can be installed synchronously when the energy pile is built. No external energy is required during the power generation process of the energy pile. The geothermal energy in the soil is utilized and the energy pile can operate automatically throughout its life cycle.

[0041] 2) Compared to traditional energy piles, the integrated heat exchange tubes and circulating structure enable large-scale production, eliminating the need for additional construction steps. This simplifies the construction process, reduces construction costs, and promotes the widespread use of underground energy structures. Compared to traditional geothermal collection methods, this invention utilizes geothermal energy more efficiently, converting heat energy into electricity through a generator, providing a continuous energy supply.

[0042] 3) Each device in the energy pile is firmly installed on the vertical reinforcement through the positioning plate, which effectively improves the stability and durability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the overall structure of the integrated energy pile based on the organic Rankine cycle principle of the present invention.

[0044] Figure 2 This is a schematic diagram of the internal structure of the integrated energy pile based on the organic Rankine cycle principle of the present invention.

[0045] Figure 3 This is a schematic diagram of the power generation system of the integrated energy pile based on the organic Rankine cycle principle of the present invention.

[0046] Legend: 1. Heat extraction section; 11. First water collector; 12. First water distributor; 13. First heat exchange tube; 2. Cooling section; 21. Second water collector; 22. Second water distributor; 23. Second heat exchange tube; 3. Power generation system; 31. Expander; 32. Second positioning plate; 33. Third positioning plate; 34. Generator; 341. Terminal block; 4. Vertical rib; 5. Water pump; 6. Water pump bracket; 7. First positioning plate. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] See Figure 1The present invention provides an integrated energy pile based on the organic Rankine cycle principle and its construction method. This solves the problem that existing energy piles, which use bored cast-in-place piles and can only serve as a heat source by themselves, require additional heat pump units, resulting in a low degree of integration and additional construction steps, which in turn affect the normal construction process and limit the further promotion and utilization of underground energy structures. 1) By directly embedding the generator and expander within the energy pile, the generator system can be installed simultaneously during the construction of the energy pile. The energy pile generates electricity without the need for external energy sources, utilizing geothermal energy in the soil and maintaining automatic operation throughout its lifecycle. 2) Compared with traditional energy piles, the integrated heat exchange tubes and circulation structure enable large-scale production without the need for additional construction steps, simplifying the construction process and reducing construction costs, thus promoting the promotion and utilization of underground energy structures. Compared with traditional geothermal collection methods, this invention can more efficiently utilize geothermal energy and convert heat energy into electricity through the generator, providing a continuous energy supply. 3) Each device in the energy pile is securely mounted to the vertical reinforcement using a positioning plate, effectively improving the stability and durability of the equipment.

[0049] The following describes an integrated energy pile based on the organic Rankine cycle principle and its construction method according to the present invention with reference to the accompanying drawings.

[0050] See Figure 1 , showing the overall structural diagram of an integrated energy pile based on the organic Rankine cycle principle of the present invention. Figure 2 , showing the internal structure of an integrated energy pile based on the organic Rankine cycle principle of the present invention. Figure 3 , shows a schematic diagram of a power generation system of an integrated energy pile based on the principle of organic Rankine cycle. Figures 1 to 3 , an integrated energy pile based on the organic Rankine cycle principle and its construction method are described in the present invention.

[0051] like Figures 1 to 3 As shown, the present invention is an integrated energy pile based on the organic Rankine cycle principle, comprising:

[0052] steel skeleton;

[0053] A heat extraction section 1 and a cooling section 2 are installed in the steel frame, wherein the heat extraction section 1 is located below the cooling section 2. The heat extraction section 1 and the cooling section 2 are formed into an internally closed circulation structure and a heat exchange medium flows therein. The cooling section 2 includes a second water collector 21 for collecting the heat exchange medium. The heat extraction section 1 includes a first water distributor 12. A condenser is provided on one side of the first water distributor 12. The condenser extends from one side into the second water distributor 21 and extends from the other side, so that the first water distributor 12 and the second water distributor 21 can exchange heat.

[0054] The power generation system 3 located in the cooling section 2 includes a generator 34 fixed within the steel frame and an expander 31. The generator 34 is connected to the expander 31 via a drive shaft. The expander 31 is connected to the circulation structure of the cooling section 2. The heat exchange medium in the cooling section 2 performs work in the expander 31 and drives the generator 34 via the drive shaft to generate electricity. The generator 34 is provided with a terminal 341, which is connected to external electrical equipment via a wire.

[0055] The water pump 5 is located in the cooling section 2, and the water pump 5 is connected to the circulation structure of the heat extraction section 1, and the inlet end of the water pump 5 is connected to the condenser, and then the heat exchange medium inside the heat extraction section 1 is driven to circulate through the water pump 5.

[0056] Specifically, the expander 31, generator 34, and water pump 5 are wrapped with sealing material to achieve waterproofing effect, preventing water from seeping into the above components and causing damage when pouring the pile foundation. The power generation system 3 is an organic Rankine cycle power generation device.

[0057] In one embodiment, the heat extraction section 1 includes:

[0058] Two or more vertically arranged first heat exchange tubes 13 are installed in the steel frame, and the upper ends of the first heat exchange tubes 13 are connected to the first water distributor 12;

[0059] a first water collector 11 connected to the lower end of the first heat exchange tube 13;

[0060] A first return pipe is connected between the water pump 5 and the first water collector 11.

[0061] In a preferred embodiment, there are multiple condensing tubes, and the multiple condensing tubes are spirally bent. By providing multiple condensing tubes and making the condensing tubes spirally bent, the heat exchange efficiency is improved.

[0062] In a specific embodiment, the cooling section 2 further includes:

[0063] At least two vertically arranged second heat exchange tubes 23 are installed in the steel frame, and the lower ends of the second heat exchange tubes 23 are connected to the second water collector 21;

[0064] a second water distributor 22 connected to the upper end of the second heat exchange tube 23;

[0065] The second reflux pipe is connected between the second water distributor 22 and the second water collector 21 , and the expander 31 is connected to the second reflux pipe.

[0066] In a specific embodiment, the boiling point of the heat exchange medium in the heat extraction section 1 is higher than the boiling point of the heat exchange medium in the cooling section 2, so that the heat exchange medium in the cooling section 2 is more easily vaporized, thereby enabling the heat exchange medium in the cooling section 2 in a gaseous state to perform work inside the expander 31.

[0067] In a preferred embodiment, the heat exchange medium within the heat extraction section 1 is water, and the heat exchange medium within the cooling section 2 is R245fa (pentafluoropropane). This liquid has a boiling point of 15.3 degrees Celsius and is a colorless, transparent, free-flowing liquid. It is volatile and stable at room temperature and pressure, primarily used as a refrigerant in refrigerators. After absorbing underground heat, the temperature of the water within the first manifold 11 of the heat extraction section 1 rises. Driven by the water pump 5, the water flows through the first heat exchange pipe 13 into the first manifold 12. It then flows into the second manifold 21, where it exchanges heat with the pentafluoropropane. It then flows back through the water pump 5 and the first return pipe to the first manifold 11. The pentafluoropropane in the second manifold 21, after absorbing the water's heat, evaporates or boils to form a gas. This gas then flows through the second heat exchange pipe 23 into the second manifold 22, then into the second return pipe, where it performs work in the expander 31 before returning to the second manifold 21.

[0068] Specifically, one-way valves are provided at both the inlet and outlet ends of the second manifold 21 , so that the gas in the second manifold 21 can enter the second heat exchange pipe 23 through the corresponding one-way valves to prevent backflow into the second reflux pipe.

[0069] In a specific embodiment, the steel skeleton comprises:

[0070] At least two first positioning plates 7 are spaced apart from each other;

[0071] At least two vertical ribs 4 are fixedly disposed in the first positioning plate 7 .

[0072] The first positioning plate 7 is annular and has two circles of fixing holes distributed inside and outside. The vertical ribs 4 are fixedly inserted into the fixing holes of the outer circle. The first heat exchange tube 13 of the heating section 1 and the second heat exchange tube 23 of the cooling section 2 are respectively passed through the corresponding fixing holes of the inner circle of the first positioning plate 7.

[0073] In a specific embodiment, the power generation system 3 further includes:

[0074] A second positioning plate 32 fixed on the vertical rib 4, and the expander 31 is fixed on the second positioning plate 32;

[0075] The third positioning plate 33 is fixed on the vertical rib 4 , and the generator 34 is fixed on the third positioning plate 33 .

[0076] Preferably, the second positioning plate 32 and the third positioning plate 33 have the same structure as the first positioning plate 7 .

[0077] In one embodiment, a water pump bracket 6 is further included, which is fixed to the generator 34. The water pump 5 is fixed to the water pump bracket 6. An electric motor connected to the generator 34 is installed in the water pump bracket 6. The electric energy generated by the generator 34 drives the electric motor, thereby driving the water pump 5. By providing the water pump bracket 6 and the electric motor, the generator 34 is directly electrically connected to the electric motor, thereby providing electric energy to the electric motor.

[0078] The present invention also provides a construction method of an integrated energy pile based on the organic Rankine cycle principle, which specifically includes the following steps:

[0079] S1: Assemble the steel frame;

[0080] S2: Install the heat extraction section 1 and the cooling section 2 in the steel frame, so that the heat extraction section 1 is located below the cooling section 2, and the condenser pipe of the first water distributor 12 of the heat extraction section 1 passes through the second water collector 21;

[0081] S3: Install the generator 34 and the expander 31 in the cooling section 2, install a transmission shaft between the generator 34 and the expander 31, and connect the terminal 341 on the generator 34 to the outside world through a wire;

[0082] S4: Install the water pump 5 in the cooling section 2 and connect the water pump 5 to the circulation structure of the heat extraction section 1;

[0083] S5: Inject heat exchange medium into the circulation structure of the heat extraction section 1 and the cooling section 2.

[0084] In a specific embodiment, the specific installation steps of the heat extraction section 1 are as follows:

[0085] Provide at least two first heat exchange tubes 13, install the first heat exchange tubes 13 in the steel frame, and connect the upper ends of the first heat exchange tubes 13 to the first water distributor 12;

[0086] Provide a first water collector 11, install the first water collector 11 at the lower end of the first heat exchange tube 13, and connect the two;

[0087] A first return pipe is provided and installed between the outlet end of the water pump 5 and the first water collector 11 .

[0088] In a specific embodiment, the specific installation steps of the cooling section 2 are as follows:

[0089] Provide at least two second heat exchange tubes 23, install the second heat exchange tubes 23 in the steel frame, and connect the lower ends of the second heat exchange tubes 23 to the second water collector 21;

[0090] Provide a second water separator 22, install the second water separator 22 on the upper end of the second heat exchange tube 23, and connect the two;

[0091] A second return pipe is provided and installed to connect the second water distributor 22 with the second water collector 21 .

[0092] In a specific embodiment, when installing the water pump 5, a water pump bracket 6 and an electric motor are provided, the electric motor is mounted on the water pump bracket 6, and the water pump bracket 6 is fixed to the generator 34, and the electric motor is electrically connected to the generator 34 through a wire;

[0093] Then the water pump 5 is installed on the water pump bracket 6 , and the generator 34 drives the electric motor to operate, thereby causing the water pump 5 to drive the heat exchange medium in the heat extraction section 1 to circulate.

[0094] The following is a detailed description of the use process and working principle of an integrated energy pile based on the organic Rankine cycle principle of the present invention.

[0095] The heat extraction section 1 absorbs underground heat energy, and the temperature of the water concentrated in the first water collector 11 gradually increases. Under the action of the water pump 5, the water enters the first water distributor 12 from the first water collector 11 through the first heat exchange pipe 13, then enters the condenser and exchanges heat with the pentafluoropropane in the cooling section 2, and then flows back to the first water collector 11 through the water pump 5 and the first reflux pipe.

[0096] The pentafluoropropane in the cooling section 2 is concentrated in the second water collector 21. Since the boiling point of pentafluoropropane is much lower than that of water, which is 15.3 degrees Celsius, pentafluoropropane evaporates rapidly or even boils after absorbing the heat of water, converting into a high-pressure gas state, and enters the second water distributor 22 through the second heat exchange tube 23, and then passes through the expander 31 through the first reflux pipe, and continues to flow back to the second water collector 21 after doing work in the expander 31.

[0097] Pentafluoropropane performs work in the expander 31 , and the expander 31 drives the generator 34 via the transmission shaft, thereby causing the generator 34 to generate electricity and output the electrical energy via the connection terminal 341 .

[0098] The expander 31 is a conventional technology and its working principle will not be described in detail here.

[0099] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An integrated energy pile based on the organic Rankine cycle principle, characterized by: include: steel skeleton; a heat extraction section (1) and a cooling section (2) installed in the steel frame, the heat extraction section (1) being located below the cooling section (2), the heat extraction section (1) and the cooling section (2) forming an internally closed circulation structure and having a heat exchange medium flowing therein, the cooling section (2) including a second water collector (21) for collecting the heat exchange medium, the heat extraction section (1) including a first water distributor (12), a condenser being provided on one side of the first water distributor (12), the condenser extending from one side into the second water distributor (21) and extending from the other side, so that the first water distributor (12) and the second water distributor (21) can exchange heat; The power generation system (3) located in the cooling section (2) includes a generator (34) and an expander (31) fixed in the steel frame, the generator (34) is connected to the expander (31) through a transmission shaft, the expander (31) is connected to the circulation structure of the cooling section (2), the heat exchange medium in the cooling section (2) performs work in the expander (31) and generates electric energy by driving the generator (34) through the transmission shaft, the generator (34) is provided with a terminal (341), and the terminal (341) is connected to an external electrical device through a wire; and A water pump (5) is located in the cooling section (2), and the water pump (5) is connected to the circulation structure of the heat extraction section (1), and the inlet end of the water pump (5) is connected to the condenser pipe, thereby driving the heat exchange medium inside the heat extraction section (1) to circulate.

2. The integrated energy pile based on the organic Rankine cycle principle according to claim 1 is characterized by: The heat extraction section (1) comprises: Two or more vertically arranged first heat exchange tubes (13) are installed in the steel frame, and the upper ends of the first heat exchange tubes (13) are in communication with the first water distributor (12); a first water collector (11) connected to the lower end of the first heat exchange tube (13); and A first return pipe connected between the water pump (5) and the first water collector (11).

3. The integrated energy pile based on the organic Rankine cycle principle according to claim 1 is characterized by: The cooling section (2) further comprises: At least two vertically arranged second heat exchange tubes (23) are installed in the steel frame, and the lower ends of the second heat exchange tubes (23) are in communication with the second water collector (21); a second water distributor (22) in communication with the upper end of the second heat exchange tube (23); and A second reflux pipe is connected between the second water distributor (22) and the second water collector (21), and the expander (31) is connected to the second reflux pipe.

4. The integrated energy pile based on the organic Rankine cycle principle according to claim 3 is characterized by: The boiling point of the heat exchange medium in the heat extraction section (1) is higher than that of the heat exchange medium in the cooling section (2), so that the heat exchange medium in the cooling section (2) is more easily vaporized, thereby enabling the heat exchange medium in the cooling section (2) in a gaseous state to perform work inside the expander (31).

5. The integrated energy pile based on the organic Rankine cycle principle according to claim 1 is characterized by: The steel skeleton comprises: At least two first positioning plates (7) are spaced apart from each other; At least two vertical ribs (4) are fixedly disposed in the first positioning plate (7).

6. The integrated energy pile based on the organic Rankine cycle principle according to claim 1, characterized in that: It also includes a water pump bracket (6) fixed to the generator (34), the water pump (5) fixed to the water pump bracket (6), and an electric motor connected to the generator (34) is provided in the water pump bracket (6). The electric energy generated by the generator (34) drives the electric motor, thereby driving the water pump (5) to operate.

7. A construction method of an integrated energy pile based on the organic Rankine cycle principle according to claim 1, characterized in that: The specific steps include: S1: Assemble the steel frame; S2: Install the heat extraction section (1) and the cooling section (2) in the steel frame so that the heat extraction section (1) is located below the cooling section (2), and the condenser pipe of the first water distributor (12) of the heat extraction section (1) passes through the second water collector (21); S3: Install the generator (34) and the expander (31) in the cooling section (2), install a transmission shaft between the generator (34) and the expander (31), and connect the terminal (341) on the generator (34) to the outside world through a wire; S4: Install the water pump (5) in the cooling section (2), and connect the water pump (5) to the circulation structure of the heat extraction section (1); S5: Injecting heat exchange medium into the circulation structure of the heat extraction section (1) and the cooling section (2).

8. The construction method of the integrated energy pile based on the organic Rankine cycle principle according to claim 7 is characterized in that: The specific installation steps of the heat extraction section (1) are as follows: Providing at least two first heat exchange tubes (13), installing the first heat exchange tubes (13) in the steel frame, and connecting the upper ends of the first heat exchange tubes (13) to the first water distributor (12); Providing a first water collector (11), installing the first water collector (11) at the lower end of the first heat exchange tube (13), and connecting the two; A first return pipe is provided and installed between the outlet end of the water pump (5) and the first water collector (11).

9. The construction method of the integrated energy pile based on the organic Rankine cycle principle according to claim 7 is characterized in that: The specific installation steps of the cooling section (2) are as follows: Providing at least two second heat exchange tubes (23), installing the second heat exchange tubes (23) in the steel frame, and connecting the lower ends of the second heat exchange tubes (23) to the second water collector (21); Providing a second water separator (22), installing the second water separator (22) at the upper end of the second heat exchange tube (23), and connecting the two; A second return pipe is provided and installed to connect the second water distributor (22) with the second water collector (21).

10. The construction method of the integrated energy pile based on the organic Rankine cycle principle according to claim 7, characterized in that: When installing the water pump (5), a water pump bracket (6) and an electric motor are provided, the electric motor is mounted on the water pump bracket (6), the water pump bracket (6) is fixed to the generator (34), and the electric motor is electrically connected to the generator (34) via a wire; The water pump (5) is then mounted on the water pump bracket (6), and the generator (34) drives the electric motor to operate, thereby causing the water pump (5) to drive the heat exchange medium in the heat extraction section (1) to circulate.

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