CN118232788A - Day and night radiation temperature difference power generation device and method - Google Patents
Day and night radiation temperature difference power generation device and method Download PDFInfo
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Abstract
The invention relates to the technical field of solar power generation and discloses a day and night radiation thermoelectric power generation device and a day and night radiation thermoelectric power generation method.
Description
Technical Field
The invention relates to the technical field of solar power generation, in particular to a day and night radiation thermoelectric power generation device and method.
Background
At present, due to the limitation of a limit forbidden band, the photovoltaic cell can only absorb and utilize the energy of a solar shortwave band to carry out photovoltaic power generation, and the rest solar energy is converted into heat energy. The part of heat energy cannot be utilized by the photovoltaic cell, energy is wasted by being directly emitted to the environment, and the running temperature of the photovoltaic cell is increased due to the fact that the heat cannot be rapidly emitted, so that the photoelectric conversion efficiency of the photovoltaic cell is reduced. In addition, while photovoltaic power generation provides a viable commercial route that can be achieved on a small scale in the grid and daytime, it is difficult to achieve small-scale distributed power generation without energy storage at night due to the absence of sunlight. In summary, the current solar power generation technology has the problems of insufficient solar radiation, low power generation efficiency and the like in the daytime, and cannot realize continuous power generation at night and day.
The prior art provides a photovoltaic photo-thermal combined power generation device based on solar energy frequency division, which comprises a light condensation module, a spectrum splitter, a photo-thermal power generation module, a photovoltaic power generation module and a storage battery for storing electric energy; the light focusing module is used for focusing sunlight on the spectrum splitter; the spectrum splitter is used for dividing sunlight focused by the light focusing module into two paths according to frequency spectrums, wherein one path is a high-frequency photo-thermal power generation light path, and the other path is a low-frequency photovoltaic power generation light path; the photovoltaic power generation module comprises an outer shell and a photovoltaic component arranged at the bottom in the outer shell; the opening of the outer shell of the photovoltaic power generation module is provided with a frequency divider for absorbing infrared light to generate photo-thermal power, and the heat of the frequency divider and the waste heat of the photovoltaic module generate power through a second thermoelectric module. The prior art has the problems that part of heat energy cannot be utilized by the photovoltaic cell and the photoelectric conversion efficiency is low.
Disclosure of Invention
The invention aims to provide a day and night radiation thermoelectric generation device which can utilize waste heat of photovoltaic cells and low-temperature characteristics of outer space to generate electricity, effectively improve photoelectric conversion efficiency, and realize utilization of solar energy full spectrum band energy and day and night continuous power generation.
In order to achieve the above object, the invention provides a day and night radiation thermoelectric generation device, which comprises a groove type condenser, a glass shell, a photovoltaic power generation layer, a radiation cooling layer, a thermoelectric power generation layer and a heat pipe, wherein the groove type condenser is positioned below the heat pipe, the heat pipe is arranged at the focusing center of the groove type condenser, the thermoelectric power generation layer is sleeved on the heat pipe, the radiation cooling layer is arranged at the outer side of the thermoelectric power generation layer facing the sky, the photovoltaic power generation layer is arranged at the outer side of the thermoelectric power generation layer facing the groove type condenser, the glass shell is sleeved on the photovoltaic power generation layer and the radiation cooling layer, and the groove type condenser, the glass shell, the photovoltaic power generation layer, the radiation cooling layer, the thermoelectric power generation layer and the heat pipe are all coaxially arranged.
Preferably, the heat pipe is located at the focusing center part of the groove type condenser and is an evaporation end.
Preferably, the thermoelectric generation layer comprises a sky side thermoelectric generation layer and a condenser side thermoelectric generation layer, the outside of the sky side thermoelectric generation layer faces the sky, the radiation cooling layer is arranged on the outside of the sky side thermoelectric generation layer, the outside of the condenser side thermoelectric generation layer faces the groove type condenser, and the photovoltaic generation layer is arranged on the outside of the condenser side thermoelectric generation layer.
Preferably, the sky side thermoelectric generation layer includes sky side thermoelectric generation layer hot junction and sky side thermoelectric generation layer cold junction, sky side thermoelectric generation layer cold junction with the inboard laminating of radiation cooling layer, sky side thermoelectric generation layer hot junction with the heat pipe evaporation end laminating.
Preferably, the condenser side thermoelectric generation layer comprises a condenser side thermoelectric generation layer hot end and a condenser side thermoelectric generation layer cold end, the condenser side thermoelectric generation layer hot end is attached to the inner side of the photovoltaic generation layer, and the condenser side thermoelectric generation layer cold end is attached to the evaporation end of the heat pipe.
Preferably, the thermoelectric generation layer further comprises a P-type thermoelectric leg block and an N-type thermoelectric leg block, wherein the inner side sectional areas of the P-type thermoelectric leg block and the N-type thermoelectric leg block are smaller than the outer side sectional areas, and the P-type thermoelectric leg block and the N-type thermoelectric leg block are arranged at intervals along the circumferential direction.
Preferably, a vacuum layer is formed between the glass shell, the photovoltaic power generation layer and the radiation cooling layer by vacuumizing.
Preferably, the radiation cooling layer comprises a reflecting layer and an emitting layer, the reflecting layer is located at one side closer to the heat pipe, the emitting layer is sleeved on the outer side of the reflecting layer, and the outer surface of the cold end of the sky-side thermoelectric generation layer is attached to the inner surface of the reflecting layer.
Preferably, the photovoltaic power generation layer, the radiation cooling layer, the thermoelectric power generation layer and the heat pipe are all bonded through insulating heat conduction silicone grease.
The invention also provides a day and night radiation thermoelectric generation method, which comprises the following steps: when sunlight irradiates in daytime, the sunlight irradiates onto the trough type condenser, the trough type condenser reflects and converges the incident sunlight and irradiates the incident sunlight onto the surface of the photovoltaic power generation layer through the glass shell, the rest sunlight irradiates onto the radiation cooling layer through the glass shell, the reflecting layer irradiates most of the sunlight irradiating onto the radiation cooling layer to reflect into the atmosphere, the emitting layer radiates heat into the atmosphere through self heat radiation, the temperature of the cold end of the sky-side thermoelectric power generation layer attached to the reflecting layer is reduced, the solar radiation of the long wave band absorbed by the photovoltaic power generation layer is converted into heat energy to be transmitted to the hot end of the condenser-side thermoelectric power generation layer, the hot end of the condenser-side thermoelectric power generation layer is enabled to be increased in temperature, the cold end of the condenser-side thermoelectric power generation layer is enabled to transmit heat to the evaporating end, the inside working medium of the evaporating end absorbs and transmits heat to the condensing end of the heat to the heat pipe, the inside the condensing end radiates heat to the atmosphere, the temperature of the sky-side thermoelectric power generation layer is enabled to be reduced, the sky-side thermoelectric power generation layer is enabled to be transmitted to the cold end of the sky-side thermoelectric power generation layer, the sky-side thermoelectric power generation layer is enabled to be reduced, the temperature of the sky-side thermoelectric layer is enabled to be reduced, the sky-side thermoelectric layer is enabled to be transmitted to be cooled, the temperature is enabled to be reduced, the temperature of the sky-side is enabled to be reduced, the temperature is enabled to be transmitted to be cooled, the cold end is enabled to be cooled, and the temperature is enabled to be cooled to the cold side, and the temperature is cooled, generating electric energy.
Compared with the prior art, the invention has the beneficial effects that:
Through the coupling between heat pipe, thermoelectric generation layer, photovoltaic generation layer and the radiation cooling layer, photovoltaic generation layer absorbs solar energy shortwave band energy and generates electricity, thermoelectric generation layer utilizes solar energy longwave band energy to generate electricity, and gather solar energy through the trough type condenser and can improve integrated power generation device's power generation, reduce cost, the heat pipe can take away the heat of condenser side thermoelectric generation layer cold junction end fast, increase the cold and hot end difference in temperature of trough type condenser and reduce the temperature of photovoltaic generation layer, can effectively improve photovoltaic thermoelectric integration power generation device's generating efficiency, utilize solar energy full spectrum band energy, the high-efficient solar energy of utilizing is generated electricity, energy-conservation environmental protection, effectively improve photoelectric conversion efficiency, and realize continuous power generation round clock, widen practical application scene.
Drawings
FIG. 1 is a schematic diagram of a diurnal radiation thermoelectric generation device of an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a diurnal radiation thermoelectric generation device of an embodiment of the present invention;
FIG. 3 is a schematic view of a thermoelectric generation layer of a diurnal radiation thermoelectric generation device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the operation of the diurnal radiation thermoelectric generation device of the embodiment of the present invention.
In the figure, 1, a trough type condenser; 2. a glass housing; 3. a vacuum layer; 4. a photovoltaic power generation layer; 5. a radiation cooling layer; 51. an emissive layer; 52. a reflective layer; 6. a thermoelectric generation layer; 61. a condenser side thermoelectric generation layer; 62. sky side thermoelectric generation layer; 63. a sky-side thermoelectric generation layer hot end; 64. a cold end of the sky-side thermoelectric generation layer; 65. a condenser side thermoelectric generation layer hot end; 66. a condenser side thermoelectric generation layer cold end; 7. a heat pipe; 71. an evaporation end; 8. p-type thermoelectric leg blocks; 9. an N-type thermoelectric leg block; 10. an inner metal conductive sheet; 11. an outer metal conductive sheet; 12. sunlight is incident; 13. sunlight is reflected; 14. and (5) heat radiation.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
As shown in fig. 1, a day and night radiation thermoelectric generation device of a preferred embodiment of the present invention includes a trough type condenser 1, a glass housing 2, a photovoltaic power generation layer 4, a radiation cooling layer 5, a thermoelectric power generation layer 6 and a heat pipe 7, wherein the trough type condenser 1 is located below the heat pipe 7, the heat pipe 7 is arranged at the focusing center of the trough type condenser 1, the thermoelectric power generation layer 6 is sleeved on the heat pipe 7, the radiation cooling layer 5 is arranged at the outer side of the thermoelectric power generation layer 6 facing the sky, the photovoltaic power generation layer 4 is arranged at the outer side of the thermoelectric power generation layer 6 facing the trough type condenser 1, the glass housing 2 is sleeved on the photovoltaic power generation layer 4 and the radiation cooling layer 5, and the trough type condenser 1, the glass housing 2, the photovoltaic power generation layer 4, the radiation cooling layer 5, the thermoelectric power generation layer 6 and the heat pipe 7 are all coaxially arranged.
The thermoelectric generation layer 6 can absorb heat energy and generate power based on the Seebeck effect, the thermoelectric generation layer 6 is coupled with the photovoltaic generation layer 4, solar energy spectrum energy which cannot be utilized by the photovoltaic generation layer 4 can be converted into heat energy and transferred to a thermoelectric device for use, the surface temperature of a battery is effectively reduced, and additional electric energy output is generated, so that the utilization of solar energy full spectrum band energy is realized.
The heat pipe 7 can quickly dissipate heat through evaporation and condensation of working media, the heat pipe 7 and the photovoltaic power generation layer 4 are coupled with the thermoelectric power generation layer 6 to form a photovoltaic-thermoelectric-heat pipe structure, the temperature difference of the cold and hot ends of the thermoelectric power generation layer 6 is increased, the surface temperature of the photovoltaic power generation layer 4 is reduced, and the photoelectric conversion efficiency of the device is effectively improved.
Radiation cooling is a passive cooling technique that uses its own high solar reflectance and high thermal emissivity to reflect solar radiation out and radiates heat into the cool universe through an "atmospheric window", e.g., 0.3 μm-2.5 μm, 3.2 μm-4.8 μm, 7 μm-14 μm, to achieve a cooling effect below ambient temperature. The heat pipe 7 and the thermoelectric generation layer 6 are coupled, so that the temperature difference of the cold end and the hot end of the thermoelectric generation sheet can be increased in the daytime, the surface temperature of the photovoltaic cell can be reduced, and the photoelectric conversion efficiency of the device can be improved; the thermoelectric generation sheet can also generate power by utilizing the characteristics of the low-temperature cold source of the outer space at night, so that day and night continuous power generation is realized.
The photovoltaic temperature difference integrated power generation device based on radiation cooling and the heat pipe is used for generating power, the photovoltaic cell absorbs solar short wave band energy for generating power, the temperature difference power generation sheet utilizes solar long wave band energy for generating power, the photovoltaic temperature difference integrated power generation device can utilize solar full spectrum band energy, the utilization rate of solar energy is improved, and solar light is concentrated through the trough type condenser to improve the power generation of the integrated power generation device, so that the cost is reduced. The heat pipe can rapidly take away the heat of the cold end of the condenser side temperature difference power generation layer, increase the temperature difference of the cold end and the hot end of the condenser side temperature difference power generation layer, reduce the temperature of the photovoltaic power generation layer and effectively improve the power generation efficiency of the photovoltaic temperature difference integrated power generation device.
The photovoltaic power generation layer in this embodiment is a flexible perovskite solar cell.
The heat pipe 7 is located at the focusing center of the trough condenser 1 and is an evaporation end 71, the right side of the evaporation end 71 is an adiabatic end and a condensation end, which are beyond the condenser, and the width of the condenser only covers the evaporation end 71 of the heat pipe 7.
As shown in fig. 3, the thermoelectric generation layer 6 includes a sky-side thermoelectric generation layer 62 and a condenser-side thermoelectric generation layer 61, the sky-side thermoelectric generation layer 62 and the condenser-side thermoelectric generation layer 61 are independent and unconnected, the outside of the sky-side thermoelectric generation layer 62 faces the sky, and the radiation cooling layer 5 is disposed on the outside of the sky-side thermoelectric generation layer 62, the outside of the condenser-side thermoelectric generation layer 61 faces the trough condenser 1, and the photovoltaic generation layer 4 is disposed on the outside of the condenser-side thermoelectric generation layer 61, the radiation cooling layer and the sky-side thermoelectric generation layer are coupled to be capable of radiating and refrigerating the sunlight due to high reflectivity and emissivity thereof, and reducing the cold end temperature of the sky-side thermoelectric generation layer, so that the integrated power generation device can continuously generate electricity in daytime and night.
The sky side thermoelectric generation layer 62 includes sky side thermoelectric generation layer hot junction 63 and sky side thermoelectric generation layer cold junction 64, and sky side thermoelectric generation layer cold junction 64 is laminated with the inboard of radiant cooling layer 5, and sky side thermoelectric generation layer hot junction 63 is laminated with evaporation end 71.
The concentrator side thermoelectric generation layer 61 includes a concentrator side thermoelectric generation layer hot end 65 and a concentrator side thermoelectric generation layer cold end 66, the concentrator side thermoelectric generation layer hot end 65 is attached to the inner side of the photovoltaic generation layer 4, and the concentrator side thermoelectric generation layer cold end 66 is attached to the evaporation end 71.
As shown in fig. 2, 10 is an inner metal conductive sheet, 11 is an outer metal conductive sheet, the thermoelectric generation layer 6 further comprises P-type thermoelectric leg blocks 8 and N-type thermoelectric leg blocks 9,P, the inner side cross-sectional area of the P-type thermoelectric leg blocks 8 and N-type thermoelectric leg blocks 9 is smaller than the outer side cross-sectional area, the P-type thermoelectric leg blocks 8 and N-type thermoelectric leg blocks 9 are arranged at intervals along the circumferential direction, the material is bismuth telluride, and the thermoelectric leg blocks with variable cross-sectional areas are beneficial to improving the power generation efficiency of the thermoelectric generation sheet. A P-type thermoelectric leg block 8 and an N-type thermoelectric leg block 9 are welded to the same metal conductive sheet.
And vacuumizing between the glass shell 2 and the photovoltaic power generation layer 4 and between the glass shell and the radiation cooling layer 5 to form a vacuum layer 3. The vacuum layer can avoid the erosion of the photovoltaic power generation layer and the radiation refrigerating layer by the environment, and prevent the photovoltaic power generation layer from directly dissipating heat from the surface by convection and heat conduction with air.
The power generated by the integrated power generation device can be improved and the cost can be reduced by condensing the light by the trough condenser 1. And the vacuum layer can avoid the corrosion of the environment to the photovoltaic power generation layer and the radiation refrigeration layer, improve the durability of the device and widen the practical application scene.
As shown in fig. 2, the radiation cooling layer 5 includes a reflecting layer 52 and an emitting layer 51, the reflecting layer 52 is located at a side closer to the heat pipe 7, the emitting layer 51 is sleeved at the outer side of the reflecting layer 52, and the outer surface of the cold end 64 of the sky-side thermoelectric generation layer is attached to the inner surface of the reflecting layer 52. As shown in fig. 2, the semi-annular radiation cooling layer 5 is divided into a coaxial semi-annular reflecting layer 52 and an emitting layer 51, and the silver film reflecting layer is deposited on the lithium fluoride emitting layer by electron beam evaporation.
The photovoltaic power generation layer 4, the radiation cooling layer 5, the thermoelectric power generation layer 6 and the heat pipe 7 are all bonded through insulating heat conduction silicone grease. The insulating heat-conducting silicone grease can reduce the contact thermal resistance of each layer of bonding and prevent heat accumulation.
The invention also provides a day and night radiation thermoelectric generation method, as shown in fig. 4, wherein 12 is the sunlight incidence direction, 13 is the sunlight reflection direction, 14 is the heat radiation, and the method comprises the following steps: when sunlight irradiates in daytime, the sunlight irradiates on the trough type condenser 1, the trough type condenser 1 reflects and gathers the incident sunlight to irradiate on the surface of the photovoltaic power generation layer 4 through the glass shell 2, the photovoltaic power generation layer 4 is a flexible perovskite solar cell, the reflected sunlight can be absorbed and solar radiation in a short wave band (lower than 800 nm) is converted into electric energy by utilizing a photovoltaic effect, the solar radiation in a long wave band (higher than 800 nm) is absorbed by the photovoltaic power generation layer 4 and then is converted into heat energy, the rest of the sunlight irradiates on the radiation cooling layer 5 through the glass shell 2, the reflecting layer 52 and the emitting layer 51 are respectively a silver film and lithium fluoride, the solar reflectivity of the radiation cooling layer 5 is 0.953, the thermal emissivity is 0.894, the cooling power is 40W/m 2, the reflecting layer 52 reflects most of the sunlight irradiated on the radiation cooling layer 5 into the atmosphere, the emitting layer 51 radiates heat to the atmosphere through self heat radiation, so that the temperature of the cold end 64 of the sky-side thermoelectric generation layer attached to the reflecting layer 52 is reduced, the temperature is close to or even lower than the temperature of ambient air, solar radiation of the long wave band absorbed by the photovoltaic generation layer 4 is converted into heat energy to be transmitted to the hot end 65 of the condenser-side thermoelectric generation layer, the temperature is increased, the hot end 65 of the condenser-side thermoelectric generation layer transmits heat to the cold end 66 of the condenser-side thermoelectric generation layer, part of the heat is converted into electric energy through the Seebeck effect, the cold end 66 of the condenser-side thermoelectric generation layer transmits heat energy to the evaporation end 71, the working medium in the evaporation end 71 absorbs and transmits the heat to the condensation end of the heat pipe 7 through evaporation, the heat is radiated through condensation in the condensation end, the temperature of the cold end 66 of the condenser-side thermoelectric generation layer is reduced, the evaporation end 71 transfers heat to the sky-side thermoelectric generation layer hot end 63 to raise the temperature thereof, the sky-side thermoelectric generation layer hot end 63 transfers heat to the sky-side thermoelectric generation layer cold end 64 and converts part of the heat into electric energy by using the seebeck effect, the sky-side thermoelectric generation layer cold end 64 transfers heat to the reflecting layer 52, when no sunlight irradiates at night, the radiation cooling layer 5 dissipates self heat by heat radiation by using high heat emissivity and the characteristics of an outer space low-temperature cold source to reduce the temperature, the sky-side thermoelectric generation layer cold end 64 transfers heat to the radiation cooling layer 5 to lower the temperature thereof than the temperature of the sky-side thermoelectric generation layer hot end 63 and generates electric energy by using the seebeck effect.
In summary, the embodiment of the invention provides a day and night radiation thermoelectric generation device and a day and night radiation thermoelectric generation method, which are characterized in that through coupling among a heat pipe, a thermoelectric generation layer, a photovoltaic generation layer and a radiation cooling layer, the photovoltaic generation layer absorbs solar energy shortwave band energy to generate electricity, the thermoelectric generation layer utilizes solar energy longwave band energy to generate electricity, solar light is concentrated through a trough condenser to improve the power generation of an integrated power generation device, the cost is reduced, the heat pipe can rapidly take away the heat of the cold end of the condenser side thermoelectric generation layer, the temperature difference between the cold end and the hot end of the trough condenser is increased, the temperature of the photovoltaic generation layer is reduced, the power generation efficiency of the photovoltaic thermoelectric integrated power generation device can be effectively improved, the solar energy is efficiently utilized to generate electricity, the energy is saved, the environment is protected, the photoelectric conversion efficiency is effectively improved, day and night continuous power generation is realized, and the practical application scene is widened.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
1. The utility model provides a radiation thermoelectric generation device round clock, its characterized in that, including slot type spotlight ware (1), glass shell (2), photovoltaic power generation layer (4), radiation cooling layer (5), thermoelectric power generation layer (6) and heat pipe (7), slot type spotlight ware (1) are located heat pipe (7) below, heat pipe (7) set up in the focus of slot type spotlight ware (1), thermoelectric power generation layer (6) suit is in on heat pipe (7), radiation cooling layer (5) set up in the outside of thermoelectric power generation layer (6) towards the sky, photovoltaic power generation layer (4) set up in the outside of thermoelectric power generation layer (6) towards slot type spotlight ware (1), glass shell (2) suit is in on photovoltaic power generation layer (4) and radiation cooling layer (5), slot type spotlight ware (1), glass shell (2), photovoltaic power generation layer (4), radiation cooling layer (5), thermoelectric power generation layer (6) and (7) are coaxial setting.
2. A diurnal radiation thermoelectric generation device as claimed in claim 1, characterized in that the heat pipe (7) is located in the focusing center portion of the trough condenser (1) as an evaporation end (71).
3. The day and night radiation thermoelectric generation device according to claim 2, wherein the thermoelectric generation layer (6) comprises a sky-side thermoelectric generation layer (62) and a condenser-side thermoelectric generation layer (61), the outside of the sky-side thermoelectric generation layer (62) faces the sky, and the radiation cooling layer (5) is arranged on the outside of the sky-side thermoelectric generation layer (62), the outside of the condenser-side thermoelectric generation layer (61) faces the trough-type condenser (1), and the photovoltaic generation layer (4) is arranged on the outside of the condenser-side thermoelectric generation layer (61).
4. A day and night radiation thermoelectric generation device according to claim 3, characterized in that the sky side thermoelectric generation layer (62) comprises a sky side thermoelectric generation layer hot end (63) and a sky side thermoelectric generation layer cold end (64), the sky side thermoelectric generation layer cold end (64) is attached to the inner side of the radiation cooling layer (5), and the sky side thermoelectric generation layer hot end (63) is attached to the evaporation end (71).
5. The day and night radiation thermoelectric generation device according to claim 4, wherein the concentrator side thermoelectric generation layer (61) comprises a concentrator side thermoelectric generation layer hot end (65) and a concentrator side thermoelectric generation layer cold end (66), the concentrator side thermoelectric generation layer hot end (65) is attached to the inner side of the photovoltaic generation layer (4), and the concentrator side thermoelectric generation layer cold end (66) is attached to the evaporation end (71).
6. The day and night radiation thermoelectric generation device according to claim 5, wherein the thermoelectric generation layer (6) further comprises a P-type thermoelectric leg block (8) and an N-type thermoelectric leg block (9), the inner side sectional areas of the P-type thermoelectric leg block (8) and the N-type thermoelectric leg block (9) are smaller than the outer side sectional areas, and the P-type thermoelectric leg block (8) and the N-type thermoelectric leg block (9) are arranged at intervals along the circumferential direction.
7. A diurnal radiation thermoelectric power generation device according to claim 6, characterized in that the vacuum layer (3) is formed by evacuating between the glass housing (2) and the photovoltaic power generation layer (4) and the radiation cooling layer (5).
8. The day and night radiation thermoelectric generation device according to claim 7, wherein the radiation cooling layer (5) comprises a reflecting layer (52) and an emitting layer (51), the reflecting layer (52) is located at one side closer to the heat pipe (7), the emitting layer (51) is sleeved on the outer side of the reflecting layer (52), and the outer surface of the cold end (64) of the sky side thermoelectric generation layer is attached to the inner surface of the reflecting layer (52).
9. The day and night radiation thermoelectric power generation device according to any one of claims 1 to 8, wherein the photovoltaic power generation layer (4), the radiation cooling layer (5), the thermoelectric power generation layer (6) and the heat pipe (7) are all bonded through insulating heat-conducting silicone grease.
10. A day and night radiation thermoelectric generation method is characterized by comprising the following steps: when sunlight irradiates in daytime, the sunlight irradiates on the trough type condenser (1), the trough type condenser (1) irradiates incident sunlight on the surface of the photovoltaic power generation layer (4) through the glass shell (2) in a reflection mode, the rest sunlight irradiates on the radiation cooling layer (5) through the glass shell (2), the reflecting layer (52) reflects most sunlight irradiated on the radiation cooling layer (5) into the atmosphere, the transmitting layer (51) radiates heat into the atmosphere through self heat radiation, so that the temperature of a sky-side thermoelectric power generation layer cold end (64) attached to the reflecting layer (52) is reduced, the photovoltaic power generation layer (4) absorbs solar radiation in a long wave band and transfers heat energy to a condenser-side thermoelectric power generation layer hot end (65) to enable the temperature of the solar radiation to be increased, the condenser-side thermoelectric power generation layer hot end (65) transfers heat to a condenser-side thermoelectric power generation layer cold end (66), part of the heat is converted into electric energy, the condenser-side thermoelectric power generation layer cold end (66) transfers heat to an evaporation end (71) to an evaporation end, the temperature of the evaporation end (71) transfers heat to a condensation end (71) to a condensation end, the condensation end (71) transfers heat to the condensation end through the condensation end, make its temperature rise, sky side thermoelectric generation layer hot junction (63) give sky side thermoelectric generation layer cold junction (64) with heat transfer, turn into the electric energy with partial heat, sky side thermoelectric generation layer cold junction (64) with heat transfer to reflection stratum (52), when not shining in the sunshine night, radiation cooling layer (5) will self heat through the thermal radiation loss, make the temperature reduce, sky side thermoelectric generation layer cold junction (64) with heat transfer for radiation cooling layer (5), make its temperature be less than the temperature of sky side thermoelectric generation layer hot junction (63), produce the electric energy.
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| CN202410237346.7A CN118232788A (en) | 2024-03-01 | 2024-03-01 | Day and night radiation temperature difference power generation device and method |
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