Lunar Surface Heat Storage Thermoelectric Generation System with Optical Fiber Light Collection and In-Band Mirror Irradiation

Abstract

The present invention relates to a lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation, which includes a frame body, a Fresnel lens arranged at the top of the frame body, and a lower bottom of an in-band mirror enclosed heat insulation cavity arranged at the bottom of the frame body. Between the Fresnel lens and the lower bottom of the in-band mirror enclosed heat insulation cavity, a converging light frustum array, an optical fiber with its upper end coupled to the lower bottom of the converging light frustum array, an upper bottom of the in-band mirror enclosed heat insulation cavity for inserting and holding the optical fiber, a high light absorption layer directly irradiated by the optical fiber, a heat storage material sealed box with its upper surface closely adjacent to the high light absorption layer, and a heat insulation pad placed between the heat storage material sealed box and the lower bottom of the in-band mirror enclosed heat insulation cavity are successively arranged from top to bottom. After being concentrated by the Fresnel lens and then passing through the converging light frustum array, the problem of the change in the position of the focus of the Fresnel lens and the non-concentration of the focus when the incident angle of solar irradiation changes is overcome, ensuring the performance of the photovoltaic panel and good stability.

Description

Technical Field

[0001] The present invention belongs to the field of thermoelectric power generation, and relates to a lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and internal mirror irradiation. Background Art

[0002] Thermoelectric power generation is a fully solid-state power generation technology that directly converts thermal energy into electrical energy using thermoelectric materials, and has the advantages of no noise, no wear, no medium leakage, small volume, light weight, convenient movement, long service life, etc. The Office of Space and Defense Power Systems of the US Department of Energy said that thermoelectric power generation is "a power technology proven to be reliable in performance, requiring little maintenance, and capable of working for a long time in extremely harsh environments". Therefore, thermoelectric power generation technology is particularly suitable for lunar surface photo-thermal power generation, and can effectively solve the problem of lunar night power supply by storing heat during lunar day and generating electricity by the temperature difference during lunar night.

[0003] Building a lunar base in the future has become an international consensus, and the construction of the lunar base depends on a stable energy supply. The solar irradiance intensity on the sunny side of the moon reaches 1353W / m 2 , and the photo-thermal resources are very rich. Traditionally, due to its relatively high power generation efficiency (~26%), the solar photovoltaic panel power generation method is generally adopted.

[0004] However, under the direct action of high-energy rays and high-energy particles, the performance of the photovoltaic panel decays to a certain extent, the service life is shortened, the stability is poor, and photovoltaic power generation cannot be continuously carried out during the lunar night period. Summary of the Invention

[0005] In view of this, the present invention provides a lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and internal mirror irradiation to solve the problems of certain performance decay, shortened service life, poor stability of the currently commonly used solar photovoltaic panel power generation method under the direct action of high-energy rays and high-energy particles on the lunar surface, and the inability to continuously carry out photovoltaic power generation during the lunar night period.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] Lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation, comprising a frame body, a Fresnel lens arranged at the top of the frame body, and a lower bottom of an in-band mirror enclosed heat preservation cavity arranged at the bottom of the frame body. Between the Fresnel lens and the lower bottom of the in-band mirror enclosed heat preservation cavity, a converging light quadrangular frustum array, an optical fiber with its upper end coupled to the lower bottom of the converging light quadrangular frustum array, an upper bottom of the in-band mirror enclosed heat preservation cavity for inserting and holding the optical fiber, a high light absorption layer directly irradiated by the optical fiber, a heat storage material sealed box with its upper surface closely adjacent to the high light absorption layer, and a heat insulation pad placed between the heat storage material sealed box and the lower bottom of the in-band mirror enclosed heat preservation cavity are arranged in sequence from top to bottom. The upper bottom and the lower bottom of the in-band mirror enclosed heat preservation cavity form a box body surrounded by columns of the in-band mirror enclosed heat preservation cavity. The heat storage material sealed box is accommodated in the box body. Thermoelectric generation modules are closely attached to the four side surfaces of the heat storage material sealed box. A heat dissipation flat plate is closely attached to the surface of the thermoelectric generation module. A side panel of the in-band mirror enclosed heat preservation cavity hinged to the lower bottom of the in-band mirror enclosed heat preservation cavity and capable of being opened and closed is arranged on the side surface of the box body. The inner surfaces of the upper bottom, the lower bottom, and the side panel of the in-band mirror enclosed heat preservation cavity all have a reflective coating.

[0008] The beneficial effects of this basic solution are as follows: After sunlight is concentrated by the Fresnel lens and then further concentrated by the converging light quadrangular frustum array, the problems of the change in the position of the converging focus of the Fresnel lens and the non-concentration of the focus when the incident angle of solar irradiation changes are overcome, and optical fiber light collection is carried out to ensure the performance of the photovoltaic panel, extend the service life of the photovoltaic panel, and have good stability. Then, the heat absorption surface of the heat storage unit is irradiated in the enclosed heat preservation cavity with an in-band mirror. Thermoelectric generation modules are arranged on the four side surfaces around the heat storage unit. During the lunar day, the side panel of the in-band mirror enclosed heat preservation cavity is closed through the bottom, that is, the panel is vertical, so as to greatly reduce the radiant heat loss of the heat storage unit; during the lunar night, the side panel of the in-band mirror enclosed heat preservation cavity is opened through the bottom, that is, the panel is horizontal, and a temperature difference is formed at both ends of the thermoelectric generation module through radiant heat dissipation of the heat dissipation flat plate for thermoelectric generation.

[0009] Further, the frame body is composed of an upper frame and a lower frame arranged parallel up and down, a bottom plate, and support columns fixedly connecting the upper frame, the lower frame, and the bottom plate.

[0010] Further, the converging light quadrangular frustum array is placed on a perforated flat plate, the perforated flat plate is embedded in flat plate support bars around it, and the flat plate support bars are fixedly connected to the support columns.

[0011] Further, the converging light quadrangular frustum array includes nine hollow converging light quadrangular frustums, and the inner surfaces of the converging light quadrangular frustums have a reflective layer.

[0012] Further, the lower bottom of the in-band mirror enclosed heat preservation cavity is placed on the lower frame and the bottom plate.

[0013] Furthermore, a hollow heat insulation frame that is mutually adapted to both of them is provided between the thermoelectric power generation module and the heat dissipation flat plate.

[0014] Furthermore, the Fresnel lens and the upper frame are fixed by screws.

[0015] Furthermore, the thermoelectric power generation module and the heat dissipation flat plate are fixed on four side surfaces of the heat storage material sealed box by screws.

[0016] Furthermore, the side panel of the enclosed heat insulation cavity with an internal mirror and the lower bottom of the enclosed heat insulation cavity with an internal mirror are connected by a hinge.

[0017] Furthermore, the upper frame and the lower frame are of the same size, and the support columns are four identical hollow cylinders.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. For the lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and internal mirror irradiation disclosed by the present invention, after sunlight is concentrated by the Fresnel lens and then further concentrated by the converging light quadrangular pyramid array, the problems of the change of the focal position of the Fresnel lens and the non-concentration of the focal point when the incident angle of solar radiation changes are overcome, optical fiber light collection is carried out, the performance of the photovoltaic panel is ensured, the service life of the photovoltaic panel is prolonged, and the stability is good.

[0020] 2. For the lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and internal mirror irradiation disclosed by the present invention, the heat absorption surface of the heat storage unit is irradiated in the enclosed heat insulation cavity of the internal mirror, and the thermoelectric power generation modules are arranged on the four side surfaces around the heat storage unit. During the lunar day, the side panel of the enclosed heat insulation cavity with an internal mirror is closed at the bottom, that is, the panel is vertical, so as to greatly reduce the radiant heat loss of the heat storage unit and realize heat storage during the lunar day. During the lunar night, the side panel of the enclosed heat insulation cavity with an internal mirror is opened at the bottom, that is, the panel is horizontal, and a temperature difference is formed at both ends of the thermoelectric power generation module through radiation heat dissipation of the heat dissipation flat plate, so as to realize temperature difference power generation during the lunar night.

[0021] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in preferred detail below in conjunction with the drawings, wherein:

[0023] Figure 1Explosion structure diagram of the lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation according to the present invention;

[0024] Figure 2 Schematic structural diagram of the lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation according to the present invention after assembly;

[0025] Figure 3 Left view of the lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation according to the present invention;

[0026] Figure 4 Front view of the lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation according to the present invention;

[0027] Figure 5 Top view of the lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation according to the present invention.

[0028] Reference numerals: Fresnel lens 1, screw 2, upper end frame 3, converging light quadrangular prism array 4, perforated flat plate 5, flat plate support bar 6, optical fiber 7, upper bottom of the in-band mirror enclosed heat insulation cavity 8, high light absorption layer 9, heat storage material sealed box 10, heat dissipation flat plate 11, hollow heat insulation frame 12, support pillar of the in-band mirror enclosed heat insulation cavity 13, thermoelectric generation module 14, heat insulation pad 15, side panel of the in-band mirror enclosed heat insulation cavity 16, lower bottom of the in-band mirror enclosed heat insulation cavity 17, lower end frame and bottom plate 18, support column 19. Detailed implementation manners

[0029] The following illustrates the implementation manners of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0030] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] As Figures 1 to 5 shown, the lunar surface heat storage thermoelectric power generation system with fiber optic light collection and in-band mirror irradiation includes a frame body, a Fresnel lens 1 provided at the top of the frame body, and a lower bottom 17 of an in-band mirror enclosed heat preservation cavity provided at the bottom of the frame body. A converging light quadrangular pyramid array 4 and a perforated flat plate 5 for placing the converging light quadrangular pyramid array 4 are sequentially arranged from top to bottom between the Fresnel lens 1 and the lower bottom 17 of the in-band mirror enclosed heat preservation cavity. An optical fiber 7 whose upper end is coupled to the lower bottom of the converging light quadrangular pyramid array 4, an upper bottom 8 of the in-band mirror enclosed heat preservation cavity for the lower end of the optical fiber 7 to be inserted into, a high light absorption layer 9 directly irradiated by the optical fiber 7, a heat storage material sealed box 10 whose upper surface is close to the high light absorption layer, and a heat insulation pad 15 placed between the heat storage material sealed box 10 and the lower bottom 17 of the in-band mirror enclosed heat preservation cavity. The upper bottom 8 and the lower bottom 17 of the in-band mirror enclosed heat preservation cavity form a box body surrounded by the columns of the in-band mirror enclosed heat preservation cavity.

[0033] The heat storage material sealed box 10 is accommodated inside the box body. Four sides of the heat storage material sealed box 10 are closely attached to the thermoelectric generation module 14. The surface of the thermoelectric generation module 14 is closely attached to the heat dissipation flat plate 11. On the side of the box body, there is a side panel 16 of the enclosed heat insulation cavity with an internal mirror, which is connected to the lower bottom 17 of the enclosed heat insulation cavity with an internal mirror through a hinge and can be opened and closed. The inner surfaces of the upper bottom 8, the lower bottom 17, and the side panel 16 of the enclosed heat insulation cavity with an internal mirror all have a reflective coating. The lower bottom 17 of the enclosed heat insulation cavity with an internal mirror is placed on the lower end frame and the bottom plate 18. A hollow heat insulation frame 12 that is mutually adapted to both of them is arranged between the thermoelectric generation module 14 and the heat dissipation flat plate 11. The thermoelectric generation module 14 and the heat dissipation flat plate 11 are fixed on the four sides of the heat storage material sealed box 10 through screws 2. After the sunlight is concentrated by the Fresnel lens 1, it is further concentrated by the converging light quadrangular prism array 4, overcoming the problems of the change in the position of the converging focus of the Fresnel lens 1 and the non-concentration of the focus when the incident angle of solar radiation changes, performing fiber optic 7 light collection, ensuring the performance of the photovoltaic panel, extending the service life of the photovoltaic panel, having good stability, and then irradiating the heat absorption surface of the heat storage unit in the enclosed heat insulation cavity with an internal mirror. The thermoelectric generation module 14 is arranged on the four surrounding sides of the heat storage unit. During the lunar day, the side panel 16 of the enclosed heat insulation cavity with an internal mirror is closed at the bottom, that is, the panel is vertical, thereby greatly reducing the radiative heat loss of the heat storage unit. During the lunar night, the side panel 16 of the enclosed heat insulation cavity with an internal mirror is opened at the bottom, that is, the panel is horizontal, and a temperature difference is formed at both ends of the thermoelectric generation module 14 through radiative heat dissipation of the heat dissipation flat plate 11 for thermoelectric generation.

[0034] The frame body is composed of an upper end frame 3 and a lower end frame and bottom plate 18 that are arranged parallel to each other up and down and have the same size, and support columns 19 that fixedly connect the upper end frame 3 and the lower end frame and bottom plate 18. The support columns 19 are four identical hollow cylinders.

[0035] The Fresnel lens 1 is fixed to the upper end frame 3 through screws 2. The Fresnel lens 1 and the upper end frame 3 can be square, rectangular, or circular.

[0036] The perforated flat plate 5 is embedded in the flat plate support strip 6 around it, and the flat plate support strip 6 is fixedly connected to the support column 19.

[0037] The converging light quadrangular prism array 4 includes nine converging light quadrangular prisms. Each converging light quadrangular prism is hollow, and a converging light cone can also be used, and its inner surface has a reflective layer. In practical applications, the number of converging light quadrangular prisms can be adjusted according to needs. The Fresnel lens 1 can be square, circular, or hemispherical.

[0038] When the lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation is in use, sunlight in space is concentrated by the Fresnel lens 1 and then further concentrated by the converging light quadrangular prism array 4. The concentrated light is collected by the optical fiber 7 and then enters the sealed heat storage material box 10 in the closed heat preservation cavity with an in-band mirror for irradiation. During lunar day, the side panel 16 of the closed heat preservation cavity with an in-band mirror is closed through the bottom, that is, the panel is vertical, and the closed heat preservation cavity with an in-band mirror reflects the radiation light of the sealed heat storage material box 10 back to the sealed heat storage material box 10, thus greatly reducing the radiation heat loss of the sealed heat storage material box 10. During lunar night, the side panel 16 of the closed heat preservation cavity with an in-band mirror is opened through the bottom, that is, the panel is horizontal, and a temperature difference is formed at both ends of the thermoelectric power generation module 14 through radiation heat dissipation of the heat dissipation flat plate 11 for thermoelectric power generation.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A lunar surface heat storage thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation, characterized in that It includes a frame body, a Fresnel lens arranged at the top of the frame body, and a lower bottom of an internally reflective mirror-enclosed heat-insulating cavity arranged at the bottom of the frame body. Between the Fresnel lens and the lower bottom of the internally reflective mirror-enclosed heat-insulating cavity, a converging light frustum array, an optical fiber with its upper end coupled to the lower bottom of the converging light frustum array, an upper bottom of the internally reflective mirror-enclosed heat-insulating cavity for socketing the optical fiber, a high light-absorbing layer directly irradiated by the optical fiber, a heat storage material sealed box with its upper surface closely adjacent to the high light-absorbing layer, and a heat-insulating pad placed between the heat storage material sealed box and the lower bottom of the internally reflective mirror-enclosed heat-insulating cavity are successively arranged from top to bottom. The upper bottom and the lower bottom of the internally reflective mirror-enclosed heat-insulating cavity form a box body surrounded by columns of the internally reflective mirror-enclosed heat-insulating cavity. The heat storage material sealed box is accommodated in the box body. Thermoelectric generation modules are closely attached to four sides of the heat storage material sealed box. A heat dissipation flat plate is closely attached to the surface of the thermoelectric generation modules. A side panel of the internally reflective mirror-enclosed heat-insulating cavity hinged to the lower bottom of the internally reflective mirror-enclosed heat-insulating cavity and capable of being opened and closed is arranged on the side of the box body. The inner surfaces of the upper bottom, the lower bottom, and the side panel of the internally reflective mirror-enclosed heat-insulating cavity all have reflective coatings; The frame body is composed of an upper frame and a lower frame arranged parallel to each other up and down, a bottom plate, and support columns fixedly connecting the upper frame, the lower frame, and the bottom plate; The converging light frustum array contains nine hollow converging light frustums, and the inner surfaces of the converging light frustums have reflective layers.

2. The lunar surface heat storage thermoelectric generation system with optical fiber light collection and in-band mirror irradiation as claimed in claim 1, wherein The converging light frustum array is placed on a perforated flat plate, and the perforated flat plate is embedded in flat plate support strips around it. The flat plate support strips are fixedly connected to the support columns.

3. The lunar surface heat storage thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation as described in claim 1, wherein The lower bottom of the internally reflective mirror-enclosed heat-insulating cavity is placed on the lower frame and the bottom plate.

4. The lunar surface heat storage thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation as claimed in claim 1, wherein A hollow heat-insulating frame adapted to both of them is arranged between the thermoelectric generation module and the heat dissipation flat plate.

5. The lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation as claimed in claim 1, wherein, The Fresnel lens and the upper frame are fixed by screws.

6. The lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation as claimed in claim 1, wherein, The thermoelectric generation mode and the heat dissipation flat plate are fixed on four sides of the heat storage material sealed box by screws.

7. The lunar surface heat storage type thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation as described in claim 1, characterized in that, The side panel of the internally reflective mirror-enclosed heat-insulating cavity and the lower bottom of the internally reflective mirror-enclosed heat-insulating cavity are connected by a hinge.

8. The lunar surface heat storage thermoelectric power generation system with optical fiber light collection and in-band mirror irradiation as described in claim 2, characterized in that, The upper frame and the lower frame are of the same size, and the support columns are four identical hollow cylinders.

Images