A heat dissipation system for a photovoltaic power generation device in a lunar base

Abstract

The present invention provides a heat dissipation system for a photovoltaic power generation device of a lunar base, belonging to the field of power generation heat dissipation. It solves the problem that excessive radiant energy causes the temperature of the photovoltaic panel to rise, threatening the normal operation of the photovoltaic panel. The dish concentrator power generation system is connected to the cooling system, the cooling system is connected to the cold source matching system, and the cold source matching system is connected to the lunar soil constant temperature layer heat dissipation system. The cold source matching system and the lunar soil constant temperature layer heat dissipation system cooperate to match the cooling capacity for the dish concentrator power generation system according to whether the dish concentrator power generation system generates electricity; the cooling system includes a spray cavity, a nozzle and a porous medium layer. The spray cavity is provided with a nozzle and a porous medium layer, and the porous medium layer is arranged below the nozzle. The porous medium layer is used to prevent the attenuation of the spray cooling heat dissipation capacity. It can match the cooling capacity according to whether power generation is carried out and can prevent the attenuation of the spray cooling capacity of the nozzle.

Description

Technical Field

[0001] The present invention belongs to the field of power generation heat dissipation, and particularly relates to a heat dissipation system for a photovoltaic power generation device on a lunar base. Background Art

[0002] Humans have a great enthusiasm for exploring the boundaries of the Earth to the moon and beyond. Most of the world's space agencies' lunar colonization plans are planning to establish a large number of lunar outposts within a decade. Future lunar outposts for permanent human presence will require high power to support activities such as scientific experiments, in-situ mining and processing, astronomical observations, and surface exploration;

[0003] The interest in establishing outposts on the moon has been increasing recently, not only because rare earth metals and gases can be mined from the lunar surface, but also because useful experience can be gained from lunar exploration to prepare for Mars exploration. Building lunar outposts will help humans develop survival skills in deep space and prepare for future manned Mars missions;

[0004] A suitable energy system is the key to lunar base construction. The dish concentrator power generation system can effectively transfer large-area radiant energy to a small-area photovoltaic panel and convert it into electrical energy. However, the conversion efficiency is about 30%. The excess radiant energy causes the temperature of the photovoltaic panel to rise, threatening the normal operation of the photovoltaic panel. How to dissipate heat efficiently and quickly has become a top priority;

[0005] In addition, a single cold source is difficult to ensure sufficient and stable cold quantity supply, and a suitable cold source allocation method needs to be found. Summary of the Invention

[0006] In view of this, the present invention aims to provide a heat dissipation system for a photovoltaic power generation device on a lunar base to solve the problem that the excess radiant energy causes the temperature of the photovoltaic panel to rise and threatens the normal operation of the photovoltaic panel.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A heat dissipation system for a photovoltaic power generation device on a lunar base includes a dish concentrator power generation system, a cooling system, a cold source matching system, and a lunar soil constant temperature layer heat dissipation system. The dish concentrator power generation system is connected to the cooling system, the cooling system is connected to the cold source matching system, and the cold source matching system is connected to the lunar soil constant temperature layer heat dissipation system. The cold source matching system and the lunar soil constant temperature layer heat dissipation system cooperate to match cold quantity for the dish concentrator power generation system according to whether the dish concentrator power generation system generates electricity;

[0008] The cooling system includes a spray cavity, a nozzle, and a porous medium layer. The spray cavity is provided with a nozzle and a porous medium layer. The porous medium layer is arranged below the nozzle, and the porous medium layer is used to prevent the attenuation of the spray cooling heat dissipation capacity of the nozzle.

[0009] Furthermore, the dish concentrator power generation system includes a support frame, a dish concentrator, and a photovoltaic panel. A dish concentrator for concentrating energy is provided directly below the photovoltaic panel. The lower end of the dish concentrator is connected to a support frame, and the photovoltaic panel is disposed on the lower surface of the porous medium layer.

[0010] Furthermore, the cold source matching system includes a first valve, a pump, a radiator, a second valve, a third valve, a fourth valve, a fifth valve, a liquid storage tank, a sixth valve, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, and a fifth pipeline. The outlet end of the first pipeline extends into the spray chamber and is connected to a nozzle. The first valve and the fifth valve are provided on the first pipeline. The inlet end of the second pipeline is connected to the spray chamber, and the outlet end of the second pipeline is connected to the inlet end of the radiator. The outlet end of the radiator is connected to the first pipeline, and the connection point is disposed between the first valve and the fifth valve. The second valve and the third valve are provided on the second pipeline. The inlet end of the third pipeline is connected to the second pipeline between the second valve and the third valve. A pump and a fourth valve are sequentially provided on the third pipeline from the inlet end to the outlet end. The fourth pipeline connects the first pipeline and the third pipeline. The inlet end of the fourth pipeline is connected between the inlet end of the third pipeline and the pump, and the outlet end of the fourth pipeline is connected between the outlet end of the radiator and the fifth valve. The liquid storage tank is connected to the first pipeline through the fifth pipeline, and the connection point is located between the outlet end of the fourth pipeline and the fourth pipeline. The inlet end of the first pipeline is connected to the lunar soil constant temperature layer heat dissipation system, and the outlet end of the third pipeline is connected to the lunar soil constant temperature layer heat dissipation system.

[0011] Furthermore, the lunar soil constant temperature layer heat dissipation system includes a radiator, heat pipes, and a flow disturbance pipeline. Multiple groups of symmetrically arranged heat pipes are provided outside the radiator. The flow disturbance pipeline is disposed inside the radiator. The inlet end of the flow disturbance pipeline is connected to the outlet end of the third pipeline, and the outlet end of the flow disturbance pipeline is connected to the inlet end of the first pipeline.

[0012] Furthermore, the flow disturbance pipeline is a serpentine pipe.

[0013] Furthermore, the radiator is disposed in the lunar soil constant temperature layer.

[0014] Furthermore, the inner wall of the heat pipe adopts a porous wall structure.

[0015] Furthermore, the material of the radiator is lightweight aluminum.

[0016] Furthermore, the dish concentrator adopts a point tracking method to track the sun's movement trajectory in real time.

[0017] Furthermore, the photovoltaic panel is a gallium arsenide photovoltaic panel.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting up nozzles to spray coolant on the porous medium layer, the cooling of excess heat is completed on the premise of effectively preventing a significant attenuation of the spray cooling capacity.

[0020] 2. By setting up the cold source matching system and cooperating with the lunar soil constant temperature layer heat dissipation system to adjust the cooling capacity, the cooling capacity can be matched according to whether power generation is carried out.

[0021] 3. By setting up the radiator, it can assist in cooling and reduce the heat dissipation pressure of the radiator.

[0022] 4. By setting up the liquid storage tank and cooperating with other valves, the collection of coolant is completed, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 It is a schematic structural diagram of a heat dissipation system for a lunar base photovoltaic power generation device described in the present invention.

[0025] Support frame 1; dish concentrator 2; photovoltaic panel 3; spray chamber 4; nozzle 5; first valve 6; pump 7; radiator 8; second valve 9; third valve 10; fourth valve 11; fifth valve 12; liquid storage tank 13; radiator 14; heat pipe 15; turbulence pipe 16; porous medium layer 17; sixth valve 18; first pipe 19; second pipe 20; third pipe 21; fourth pipe 22; fifth pipe 23. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Referring to the drawings to illustrate this embodiment, a heat dissipation system for a lunar base photovoltaic power generation device includes a dish concentrator power generation system, a cooling system, a cold source matching system, and a lunar soil constant temperature layer heat dissipation system. The dish concentrator power generation system is connected to the cooling system, the cooling system is connected to the cold source matching system, and the cold source matching system is connected to the lunar soil constant temperature layer heat dissipation system. The cold source matching system and the lunar soil constant temperature layer heat dissipation system cooperate to match the cooling capacity for the dish concentrator power generation system according to whether the dish concentrator power generation system generates electricity.

[0028] The cooling system includes a spray chamber 4, a nozzle 5, and a porous medium layer 17. The spray chamber 4 is provided with a nozzle 5 and a porous medium layer 17. The porous medium layer 17 is arranged below the nozzle 5 and is used to prevent the attenuation of the spray cooling and heat dissipation capacity of the nozzle 5.

[0029] In this embodiment, the dish-type concentrating power generation system includes a support frame 1, a dish-type concentrator 2, and a photovoltaic panel 3. A dish-type concentrator 2 for concentrating energy is provided directly below the photovoltaic panel 3. The lower end of the dish-type concentrator 2 is connected to a support frame 1. The photovoltaic panel 3 is arranged on the lower surface of the porous medium layer 17.

[0030] In this embodiment, the cold source matching system includes a first valve 6, a pump 7, a radiator 8, a second valve 9, a third valve 10, a fourth valve 11, a fifth valve 12, a liquid storage tank 13, a sixth valve 18, a first pipeline 19, a second pipeline 20, a third pipeline 21, a fourth pipeline 22, and a fifth pipeline 23. The outlet end of the first pipeline 19 extends into the spray chamber 4 and is connected to the nozzle 5. The first valve 6 and the fifth valve 12 are arranged on the first pipeline 19. The inlet end of the second pipeline 20 is connected to the spray chamber 4, and the outlet end of the second pipeline 20 is connected to the inlet end of the radiator 8. The outlet end of the radiator 8 is connected to the first pipeline 19, and the connection point is arranged between the first valve 6 and the fifth valve 12. The second valve 9 and the third valve 10 are arranged on the second pipeline 20. The inlet end of the third pipeline 21 is connected to the second pipeline 20 between the second valve 9 and the third valve 10. The pump 7 and the fourth valve 11 are arranged on the third pipeline 21 in sequence from the inlet end to the outlet end. The fourth pipeline 22 connects the first pipeline 19 and the third pipeline 21. The inlet end of the fourth pipeline 22 is connected between the inlet end of the third pipeline 21 and the pump 7, and the outlet end of the fourth pipeline 22 is connected between the outlet end of the radiator 8 and the fifth valve 12. The liquid storage tank 13 is connected to the first pipeline 19 through the fifth pipeline 23, and the connection point is located between the outlet end of the fourth pipeline 22 and the fourth pipeline 22. The inlet end of the first pipeline 19 is connected to the lunar soil constant temperature layer heat dissipation system, and the outlet end of the third pipeline 21 is connected to the lunar soil constant temperature layer heat dissipation system.

[0031] In this embodiment, the lunar soil constant temperature layer heat dissipation system includes a radiator 14, heat pipes 15, and a flow disturbance pipeline 16. Multiple groups of symmetrically arranged heat pipes 15 are arranged outside the radiator 14. The flow disturbance pipeline 16 is arranged inside the radiator 14. The inlet end of the flow disturbance pipeline 16 is connected to the outlet end of the third pipeline 21, and the outlet end of the flow disturbance pipeline 16 is connected to the inlet end of the first pipeline 19.

[0032] In this embodiment, the inner wall of the heat pipe 15 adopts a porous wall structure. Under low gravity, the capillary force can play an adequate pumping role.

[0033] In this embodiment, the material of the radiator 8 is lightweight aluminum, which reduces the mass of the radiator.

[0034] In this embodiment, the dish concentrator 2 adopts a point-tracking method to track the sun's movement trajectory in real time, obtain the best solar radiation value.

[0035] In this embodiment, the photovoltaic panel 3 is a gallium arsenide photovoltaic panel, and the thermoelectric conversion efficiency is between 20% and 30%.

[0036] During use, the dish concentrator 2 can concentrate the radiated solar energy on the photovoltaic panel 3. The photovoltaic panel 3 will convert the radiant energy into electrical energy. The dish concentrator 2 can effectively convert the large-area radiant energy to the small-area photovoltaic panel, improve the energy conversion ability, and effectively avoid setting up too many photovoltaic devices to increase the infrastructure cost and usage cost.

[0037] During the lunar day, when the heat of the photovoltaic panel 3 is excessive and the temperature increases, by opening the first valve 6, the second valve 9, the fourth valve 11 and the fifth valve 12, and closing the third valve 10 and the sixth valve 18, the coolant is sprayed onto the porous medium layer 17 through the nozzle 5. The porous medium layer 17 has the function of draining liquid and blocking gas. The evaporation of the coolant occurs on the surface of the porous medium in the capillary core, and then a meniscus is formed. As the evaporation progresses, capillary force can be generated to fix the liquid droplets in the gaps of the porous medium, which is equivalent to forming a liquid film with a certain thickness. This can effectively avoid the situation that the spray cooling heat dissipation ability is greatly attenuated under the lunar microgravity. The evaporated coolant vapor enters the radiator 14 in the lunar soil constant temperature layer, transfers the heat to the constant temperature layer, and condenses into a liquid for circulating cooling.

[0038] At lunar noon, the heat of the photovoltaic panel 3 is relatively high. Relying solely on the lunar soil constant temperature layer cannot dissipate all the heat. Open the first valve 6, the second valve 9, the third valve 10, the fourth valve 11 and the fifth valve 12, and close the sixth valve 18. The coolant vapor enters the radiator 14 in the lunar soil constant temperature layer and the radiator 8 respectively, and transfers the heat to the constant temperature layer and deep space respectively, greatly reducing the working pressure of the radiator 14 in the lunar soil constant temperature layer.

[0039] During the lunar night, since the photovoltaic power generation system cannot work without light, the heat transferred to the lunar soil constant temperature layer during the lunar day is extracted into deep space during the lunar night to ensure the constant temperature of the constant temperature layer for the next lunar day. The extraction method is to open the third valve 10, the fourth valve 11 and the fifth valve 12, close the other valves in the system, drive the coolant to flow unidirectionally through the pump 7, extract the heat in the radiator 14 of the lunar soil constant temperature layer through the coolant, and then bring it into the radiator 8, so that the heat in the constant temperature layer can be brought into deep space.

[0040] When the power generation equipment is under maintenance, open the sixth valve 18, close all other valves, and pump the coolant in all pipelines into the liquid storage tank 13 through the pump 7 for collection, which is convenient for repairing the equipment.

[0041] The embodiments of the present invention disclosed above are only used to help explain the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well.

Claims

1. A heat dissipation system for a photovoltaic power generation device of a lunar base, characterized in that: It includes a dish concentrator power generation system, a cooling system, a cold source matching system, and a lunar regolith constant temperature layer heat dissipation system. The dish concentrator power generation system is connected to the cooling system, the cooling system is connected to the cold source matching system, and the cold source matching system is connected to the lunar regolith constant temperature layer heat dissipation system. The cold source matching system and the lunar regolith constant temperature layer heat dissipation system cooperate to match cooling capacity for the dish concentrator power generation system according to whether the dish concentrator power generation system generates electricity. The cooling system includes a spray chamber (4), a nozzle (5), and a porous medium layer (17). The spray chamber (4) is provided with a nozzle (5) and a porous medium layer (17) inside. The porous medium layer (17) is arranged below the nozzle (5), and the porous medium layer (17) is used to prevent the attenuation of the spray cooling heat dissipation capacity of the nozzle (5). The dish concentrator power generation system includes a support frame (1), a dish concentrator (2), and a photovoltaic panel (3). A dish concentrator (2) for concentrating energy is provided directly below the photovoltaic panel (3). The lower end of the dish concentrator (2) is connected to a support frame (1), and the photovoltaic panel (3) is arranged on the lower surface of the porous medium layer (17). The cold source matching system includes a first valve (6), a pump (7), a radiator (8), a second valve (9), a third valve (10), a fourth valve (11), a fifth valve (12), a liquid storage tank (13), a sixth valve (18), a first pipeline (19), a second pipeline (20), a third pipeline (21), a fourth pipeline (22), and a fifth pipeline (23). The outlet end of the first pipeline (19) extends into the spray chamber (4) and is communicated with the nozzle (5). The first valve (6) and the fifth valve (12) are arranged on the first pipeline (19). The inlet end of the second pipeline (20) is communicated with the spray chamber (4), and the outlet end of the second pipeline (20) is connected to the inlet end of the radiator (8). The outlet end of the radiator (8) is communicated with the first pipeline (19), and the communication point is arranged between the first valve (6) and the fifth valve (12). The second valve (9) and the third valve (10) are arranged on the second pipeline (20). The inlet end of the third pipeline (21) is communicated with the second pipeline (20) between the second valve (9) and the third valve (10). The pump (7) and the fourth valve (11) are arranged on the third pipeline (21) in sequence from the inlet end to the outlet end. The fourth pipeline (22) communicates the first pipeline (19) and the third pipeline (21). The inlet end of the fourth pipeline (22) is connected between the inlet end of the third pipeline (21) and the pump (7), and the outlet end of the fourth pipeline (22) is connected between the outlet end of the radiator (8) and the fifth valve (12). The liquid storage tank (13) is communicated with the first pipeline (19) through the fifth pipeline (23), and the communication point is located between the outlet end of the fourth pipeline (22) and the fourth pipeline (22). The inlet end of the first pipeline (19) is communicated with the lunar regolith constant temperature layer heat dissipation system, and the outlet end of the third pipeline (21) is connected to the lunar regolith constant temperature layer heat dissipation system.

2. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 1, characterized in that: The lunar regolith isothermal layer heat dissipation system includes a radiator (14), heat pipes (15) and a flow disturbance pipe (16). Multiple groups of symmetrically arranged heat pipes (15) are provided outside the radiator (14). The flow disturbance pipe (16) is arranged inside the radiator (14). The inlet end of the flow disturbance pipe (16) is connected to the outlet end of the third pipe (21), and the outlet end of the flow disturbance pipe (16) is connected to the inlet end of the first pipe (19).

3. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 2, characterized in that: The flow disturbance pipe (16) is a serpentine pipe.

4. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 2, characterized in that: The radiator (14) is arranged in the lunar regolith isothermal layer.

5. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 2, characterized in that: The inner wall of the heat pipe (15) adopts a porous wall structure.

6. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 2, characterized in that: The material of the radiator (8) is lightweight aluminum.

7. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 2, characterized in that: The dish concentrator (2) adopts a point tracking method to track the sun's movement trajectory in real time.

8. The heat dissipation system of a lunar base photovoltaic power generation device according to claim 2, characterized in that: The photovoltaic panel (3) adopts a gallium arsenide photovoltaic panel.

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