CN111509117A - Thermoelectric conversion device for moon surface - Google Patents

Thermoelectric conversion device for moon surface Download PDF

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Publication number
CN111509117A
CN111509117A CN202010320849.2A CN202010320849A CN111509117A CN 111509117 A CN111509117 A CN 111509117A CN 202010320849 A CN202010320849 A CN 202010320849A CN 111509117 A CN111509117 A CN 111509117A
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CN
China
Prior art keywords
reciprocating
lunar
heat pipe
conversion device
thermoelectric conversion
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Pending
Application number
CN202010320849.2A
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Chinese (zh)
Inventor
谢和平
张洪银
孙立成
李碧雄
李存宝
高明忠
莫政宇
唐继国
杜敏
杨伟
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Shenzhen University
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Shenzhen University
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Priority to CN202010320849.2A priority Critical patent/CN111509117A/en
Publication of CN111509117A publication Critical patent/CN111509117A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10NELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/13Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the heat-exchanging means at the junction
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10NELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/17Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device

Abstract

The invention discloses a thermoelectric conversion device for a lunar surface, which comprises the following components from top to bottom: the heat sink, the thermoelectric module group, the upper vapor chamber, the heat transfer module and the lower vapor chamber; the heat sink is attached to the upper surface of the thermoelectric module group, and the upper vapor chamber is attached to the lower surface of the thermoelectric module group; the heat transfer module comprises N parallel reciprocating heat pipes which are arranged in an array, N is an integer not less than 1, and the reciprocating heat pipes are fixedly connected between the upper vapor chamber and the lower vapor chamber; the heat sink, the thermoelectric module group and the upper part of the reciprocating heat pipe are exposed above the surface of the moon, and the lower part of the reciprocating heat pipe and the lower soaking plate are positioned in the lunar soil. The cold end and the hot end of the thermoelectric conversion device provided with the reciprocating heat pipe integrated heat transfer module can be automatically exchanged along with the change of the day and night temperature on the surface of the moon, and can continuously work in day and night to generate electricity; the energy storage device is not needed, the structure is simple, no moving part is contained, and the safety and the reliability are realized.

Description

Thermoelectric conversion device for moon surface
Technical Field
The present invention relates to the field of thermoelectric conversion devices, and in particular, to a thermoelectric conversion device for a lunar surface.
Background
The problem of effective energy supply is solved, the basis for the smooth development of manned lunar tasks is found, and the construction of a lunar base needs long-term and stable energy supply. The manned moon task has very strict requirements on an energy system, and generally has the advantages of light weight, small volume, safety, reliability, modularization and high efficiency. At present, space energy supply modes mainly comprise photovoltaic power generation, a space nuclear power supply, a fuel cell and the like. The above energy supply method has problems of discontinuous supply, short continuous operation time, poor environmental adaptability, etc.
The lunar surface is an extreme environment with the characteristics of near vacuum, extreme temperature difference and the like, and human beings cannot survive, but a constant temperature layer exists in lunar soil with the depth of less than 1m below the lunar surface, the temperature is kept at about minus 20 ℃ for a long time, and a lunar base in the lunar soil is expected to be built in the constant temperature layer, and even a large permanent human living area can be built. Because the lunar surface has almost no atmospheric layer and atmospheric activity and no atmospheric heat conduction, the lunar surface temperature caused by solar radiation in the daytime is very high and can reach about 127 ℃, the lunar surface temperature at night is very low and can reach about-183 ℃ at the lowest, and the temperature difference between the daytime and the night on the lunar surface is very large; this extremely hostile living condition is expected to provide another possibility for energy supply to the lunar base. Although some researchers propose to use the temperature difference between lunar soil and the surface of the moon and use a heat pipe and a thermoelectric direct conversion method to supply power to facilities on the surface of the moon, the existing thermoelectric conversion system can only generate power in one way in the daytime or day and night, and the power generation is discontinuous.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a thermoelectric conversion device for a lunar surface, which solves the problems of discontinuous supply, short continuous operation time, and poor environmental suitability of a conventional power generation system for a lunar surface.
The technical scheme of the invention is as follows:
a thermoelectric conversion device for a lunar surface, comprising, from top to bottom: the heat sink, the thermoelectric module group, the upper vapor chamber, the heat transfer module and the lower vapor chamber; the heat sink is attached to the upper surface of the thermoelectric module group, and the upper vapor chamber is attached to the lower surface of the thermoelectric module group; the heat transfer module comprises N parallel reciprocating heat pipes which are arranged in an array, N is an integer not less than 1, and the reciprocating heat pipes are fixedly connected between the upper vapor chamber and the lower vapor chamber; the heat sink, the thermoelectric module group and the upper part of the reciprocating heat pipe are exposed above the surface of the moon, and the lower part of the reciprocating heat pipe and the lower vapor chamber are positioned in the lunar soil.
Has the advantages that: the invention arranges the heat transfer module integrated by the reciprocating heat pipe in the thermoelectric conversion device, the upper part of the reciprocating heat pipe is exposed on the surface of the moon, and the heat transfer module is connected with the thermoelectric module group through the upper vapor chamber; the lower part of the reciprocating heat pipe is positioned in the lunar soil and fixedly connected with the lower soaking plate, so that the problem of poor heat conductivity of lunar soil rocks can be solved to a great extent; meanwhile, the reciprocating heat pipes in the heat transfer module can exchange the cold end and the hot end of the thermoelectric device along with the temperature change of the day and night on the surface of the moon, so that the thermoelectric device can continuously work in the day and night, and continuous power generation in the day and night is realized; in addition, the thermoelectric conversion device does not need to be provided with an energy storage facility, so that the structure of a power supply system is simplified; the thermoelectric conversion device does not contain moving parts, and is safe and reliable.
Drawings
Fig. 1 is a schematic perspective view of a thermoelectric conversion device for a lunar surface according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a thermoelectric conversion device for a lunar surface according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating an operation of the thermoelectric conversion device for a lunar surface shown in fig. 2;
FIG. 4 is a schematic perspective view of a heat sink;
FIG. 5 is a schematic perspective view of an upper vapor chamber;
FIG. 6 is a schematic perspective view of the lower vapor chamber;
FIG. 7 is a schematic perspective view of an additional vapor chamber;
fig. 8 is a schematic cross-sectional structure diagram of two adjacent first fixing ribs or two adjacent second fixing ribs.
Detailed Description
The present invention provides a thermoelectric conversion device for a lunar surface, which will be described in further detail below in order to make the objects, technical solutions, and effects of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the present invention provides a thermoelectric conversion device for a lunar surface, as shown in fig. 1, including: the heat sink 1, the thermoelectric module group 2, the upper vapor chamber 3, the heat transfer module 4 and the lower vapor chamber 5; the heat sink 1 is attached to the upper surface of the thermoelectric module group 2, and the upper vapor chamber 3 is attached to the lower surface of the thermoelectric module group 2; the heat transfer module 4 comprises N parallel reciprocating heat pipes 41 which are arranged in an array, wherein N is an integer not less than 1, and the reciprocating heat pipes 41 are fixedly connected between the upper soaking plate 3 and the lower soaking plate 5; the heat sink 1, the thermoelectric module group 2, and the upper portion of the reciprocating heat pipe 41 are exposed above the lunar surface (as shown by the dotted line in fig. 1), and the lower portion of the reciprocating heat pipe 41 and the lower heat spreader 5 plate are located in the lunar soil.
In this embodiment, by disposing the heat transfer module integrated with the reciprocating heat pipe in the thermoelectric conversion device, the upper portion of the reciprocating heat pipe is exposed to the lunar surface, which is connected to the thermoelectric module group through the upper soaking plate; the lower part of the reciprocating heat pipe is positioned in the lunar soil and fixedly connected with the lower soaking plate, so that the problem of poor heat conductivity of lunar soil rocks can be solved to a great extent; meanwhile, the reciprocating heat pipes in the heat transfer module can exchange the cold end and the hot end of the thermoelectric device along with the temperature change of the day and night on the surface of the moon, so that the thermoelectric device can continuously work in the day and night, and continuous power generation in the day and night is realized; in addition, the thermoelectric conversion device does not need to be provided with an energy storage facility, so that the structure of a power supply system is simplified; the thermoelectric conversion device does not contain moving parts, and is safe and reliable.
In one embodiment, the thermoelectric module group is formed by connecting a plurality of thermoelectric modules in series.
In a preferred embodiment, N.gtoreq.4; the specific value of N is determined according to the output power of the thermoelectric conversion device and the size of the thermoelectric module group.
In one embodiment, the lower soaking plate 11 is located in lunar soil at a depth of 4-5 m. In the lunar soil in the depth range, the temperature of a certain depth is constant, and the constant temperature in the depth range and the day and night temperatures (such as 127 ℃ and 183 ℃ respectively) on the surface of the moon can form a great temperature difference of more than 100 ℃, so that great temperature differences can be formed on the upper side and the lower side of the thermoelectric module group, and more continuous thermoelectric conversion is possible.
In one embodiment, M additional soaking plates 6 and additional heat transfer modules 7 are alternately arranged from top to bottom between the heat transfer module 2 and the lower soaking plate, the additional soaking plates 6 are fixedly connected with the reciprocating heat pipes 41 in the additional heat transfer modules 7, and M is an integer not less than 1; of course, both the additional soaking plate 6 and the additional heat transfer module 7 are located in the lunar soil. Soaking plates in lunar soil are also connected by adopting a heat transfer module integrated by a reciprocating heat pipe, so that the effect of increasing the heat exchange area of the lunar soil part is achieved, and the problem of poor heat conductivity of lunar soil rocks can be solved to a great extent; the solar air-to-air power supply system works continuously day and night, and does not need energy storage facilities, so that the defect that a common air-to-air power supply system needs to use the energy storage facilities is greatly simplified, the structure of the power supply system is simplified, and meanwhile, the safety is improved.
In a preferred embodiment, as shown in fig. 2, M is 1. The additional soaking plates 6 and the additional heat transfer modules 7 are excessively arranged, which may cause the structure of the thermoelectric conversion device to be complicated, and on the other hand, the temperature difference between two adjacent soaking plates may be too small to effectively transfer heat, which may not increase the heat exchange area. When 1, can have great temperature difference between additional soaking board 6 and the lower soaking board 5 of being in the different degree of depth in the lunar soil, both connect through reciprocating type heat pipe 41 integrated heat transfer module 4, form a whole, be equivalent to make the heat transfer part in the lunar soil have bigger heat transfer area, no matter the soaking board in the lunar soil is as cold junction or hot junction, the heat transfer capacity all can obtain improving, and then improves thermoelectric conversion device's generating efficiency.
The operation of the thermoelectric device will be described with reference to fig. 2 and 3: the heat transfer module integrated with the reciprocating heat pipe is arranged in the thermoelectric conversion device, and the surface tension of the working medium in the reciprocating heat pipe is adopted to drive the heat pipe to run, so that the bidirectional running can be realized: in the daytime, the heat sink 1 (the temperature of the heat sink and the temperature of the lunar surface) above the thermoelectric module group 2 serves as a hot end, the upper soaking plate 3 (the temperature of the upper soaking plate is determined by the part of the thermoelectric conversion device located in the lunar soil) below the thermoelectric module group 2 serves as a cold end, and the cold end and the hot end are exchanged when the heat sink enters the evening, so that day and night continuous work is realized, and continuous and stable power supply is provided. That is, for the part above the lunar surface, in the daytime, the heat sink 1 on the thermoelectric module group 2 is equivalent to the hot end (the cold end at night), and the part below the thermoelectric module group 2 is the cold end (the hot end at night), and through the heat transfer module integrated by the reciprocating heat pipe, the cold end and the hot end realize automatic switching along with the change of day and night, thereby ensuring the realization of the continuous working mode of the thermoelectric conversion device; for three soaking plates (an upper soaking plate, an additional soaking plate and a lower soaking plate), the upper soaking plate is a cold end (a hot end at night) of the thermoelectric module group 2, and a heat reciprocating transmission channel is formed after the three soaking plates are connected through the heat transfer modules 4 integrated by two groups of reciprocating heat pipes 41; in the daytime, heat is transferred to lunar soil from the lunar surface, and at night, heat is transferred to the lunar surface from the lunar soil, and a certain temperature difference is formed on two sides of the thermoelectric module group by utilizing the temperature difference of the lunar soil and the lunar surface, which exceeds 100 ℃, so that the thermoelectric continuous conversion is realized; the generated electricity is finally output through the electrode lines (solid lines with "+ (-) -symbol shown in fig. 1, 2) drawn out on the thermoelectric module group 2.
Further in one embodiment, the additional soaking plate 6 is positioned in the lunar soil with the depth of 1-2 m, and the lower soaking plate 5 is positioned in the lunar soil with the depth of 4-5 m. The additional soaking plates 6 and the lower soaking plates 5 in the lunar soil at different depths are also provided with certain temperature difference, the two are connected by utilizing the heat transfer module 4 integrated by the reciprocating heat pipe 41 to form a whole, which is equivalent to make the heat exchange part in the lunar soil have larger heat exchange area, and no matter the soaking plates in the lunar soil are used as cold ends or hot ends, the heat transfer quantity can be improved, so that the power generation efficiency of the thermoelectric conversion device is improved.
As shown in fig. 4, in an embodiment, the heat sink 1 includes a base plate 11 and a plurality of fins 12 spaced apart from the base plate 11 and arranged in an array, and the base plate 11 is attached to the upper surface of the thermoelectric module group 2. The heat sink 1 adopts the design with the fins 12, the radiation area of the heat sink 1 is increased, and the absorbed or released heat is improved, so that the temperature difference between two sides of the thermoelectric module group is larger, and the thermoelectric conversion efficiency is improved.
As shown in fig. 5 and 8, in an embodiment, the upper soaking plate 3 includes a soaking plate substrate 31 and a plurality of first fixing fins 32 arranged in an array at intervals below the soaking plate substrate 31, and a plurality of first positioning grooves 33 arranged in an array for fixing the upper portion of the reciprocating heat pipe 41 are recessed in one side of the first fixing fins 32 close to the reciprocating heat pipe 41.
As shown in fig. 6 and 8, in one embodiment, the lower vapor chamber 5 includes a vapor chamber substrate 31, and a plurality of second positioning grooves 33' arranged in an array and recessed in one side of the second fixing fins 32' close to the reciprocating heat pipe 41, and the second fixing fins 32' are arranged on the vapor chamber substrate 31 at intervals and arranged in an array.
As shown in fig. 7 and 8, in an embodiment, the additional soaking plate 6 includes a soaking plate substrate 31, a plurality of first fixing fins 32 arranged in an array below the soaking plate substrate 31, and a plurality of second fixing fins 32 'arranged in an array above the soaking plate substrate 31 for fixing the lower portion of the reciprocating heat pipe 41, the first fixing fins 32 are close to one side of the reciprocating heat pipe 41, a plurality of first positioning grooves 33 arranged in an array are concavely disposed on the one side of the reciprocating heat pipe 41, and the second fixing fins 32' are close to one side of the reciprocating heat pipe 41, a plurality of second positioning grooves 33 arranged in an array are concavely disposed on the one side of the reciprocating heat pipe 41, and the second positioning grooves 33 arranged in an array are fixedly disposed on the upper portion of the reciprocating heat pipe.
In one embodiment, the reciprocating heat pipe 41 is an S-shaped reciprocating heat pipe. The reciprocating heat pipe is arranged to be S-shaped, so that the heat exchange area in the lunar soil can be effectively increased, the heat transfer quantity in the lunar soil is improved, and the power generation efficiency of the whole system is improved.
The inner diameter of the S-shaped reciprocating heat pipe is a common size, such as 2-3 mm.
In one embodiment, the heat sink 1, the upper vapor chamber 3, the additional vapor chamber 6, the lower vapor chamber 5, and the reciprocating heat pipe 41 are made of materials with good thermal conductivity, such as copper, thermally conductive ceramic, and the like.
In summary, the present invention provides a thermoelectric conversion device for a lunar surface, in which a heat transfer module integrated with a reciprocating heat pipe is provided in the thermoelectric conversion device, an upper portion of the reciprocating heat pipe is exposed to the lunar surface, and is connected to a thermoelectric module group through an upper vapor chamber; the lower part of the reciprocating heat pipe is positioned in the lunar soil and fixedly connected with the lower soaking plate, so that the problem of poor heat conductivity of lunar soil rocks can be solved to a great extent; meanwhile, the reciprocating heat pipes in the heat transfer module can exchange the cold end and the hot end of the thermoelectric device along with the temperature change of the day and night on the surface of the moon, so that the thermoelectric device can continuously work in the day and night, and continuous power generation in the day and night is realized; in addition, the thermoelectric conversion device does not need to be provided with an energy storage facility, so that the structure of a power supply system is simplified; the thermoelectric conversion device does not contain moving parts, and is safe and reliable.
It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can modify or change the above descriptions, such as changing the shape, size, and number of bends of the reciprocating heat pipe, the soaking plate, structure, size, heat sink structure, fixing manner of the reciprocating heat pipe, the material and size of the thermoelectric module, and changing the position and number of the soaking plates under the lunar soil; all such modifications and variations are intended to be included herein within the scope of this disclosure and the appended claims.

Claims (10)

1. A thermoelectric conversion device for a lunar surface, comprising, from top to bottom: the heat sink, the thermoelectric module group, the upper vapor chamber, the heat transfer module and the lower vapor chamber; the heat sink is attached to the upper surface of the thermoelectric module group, and the upper vapor chamber is attached to the lower surface of the thermoelectric module group; the heat transfer module comprises N parallel reciprocating heat pipes which are arranged in an array, N is an integer not less than 1, and the reciprocating heat pipes are fixedly connected between the upper vapor chamber and the lower vapor chamber; the heat sink, the thermoelectric module group and the upper part of the reciprocating heat pipe are exposed above the surface of the moon, and the lower part of the reciprocating heat pipe and the lower vapor chamber are positioned in the lunar soil.
2. The thermoelectric conversion device for the lunar surface according to claim 1, wherein the lower soaking plate is located in the lunar soil at a depth of 4 to 5 m.
3. The thermoelectric conversion device for lunar surfaces according to claim 1, further comprising M additional soaking plates and additional heat transfer modules alternately arranged from top to bottom between the heat transfer module and the lower soaking plate, wherein the additional soaking plates are fixedly connected with the reciprocating heat pipes in the additional heat transfer modules, and M is an integer not less than 1.
4. The thermoelectric conversion device for lunar surfaces as defined in claim 3, wherein M is 1.
5. The thermoelectric conversion device for the lunar surface according to claim 4, wherein the additional soaking plate is located in the lunar soil at a depth of 1 to 2m, and the lower soaking plate is located in the lunar soil at a depth of 4 to 5 m.
6. The thermoelectric conversion device for the lunar surface as claimed in claim 1, wherein the heat sink comprises a base plate and a plurality of fins arranged in an array on the base plate at intervals, and the base plate is attached to the upper surface of the thermoelectric module group.
7. The thermoelectric conversion device for the lunar surface according to claim 1, wherein the upper soaking plate comprises a soaking plate substrate and first fixing fins arranged in an array at intervals under the soaking plate substrate, and a plurality of first positioning grooves arranged in an array are concavely provided on one side of the first fixing fins close to the reciprocating heat pipe for fixing the upper part of the reciprocating heat pipe.
8. The thermoelectric conversion device for the lunar surface as claimed in claim 1, wherein the lower soaking plate comprises a soaking plate substrate and second fixing fins arranged on the soaking plate substrate at intervals in an array, and a plurality of second positioning grooves arranged in an array are concavely formed on one side of the second fixing fins close to the reciprocating heat pipe for fixing the lower part of the reciprocating heat pipe.
9. The moon surface thermoelectric conversion device according to claim 2, wherein the additional soaking plate includes a soaking plate substrate, first fixing fins arranged in an array under the soaking plate substrate at intervals, and second fixing fins arranged in an array on the soaking plate substrate at intervals, wherein a plurality of first positioning grooves arranged in an array for fixing the upper portion of the reciprocating heat pipe are concavely provided on one side of the first fixing fins close to the reciprocating heat pipe, and a plurality of second positioning grooves arranged in an array for fixing the upper portion of the reciprocating heat pipe are concavely provided on one side of the second fixing fins close to the reciprocating heat pipe.
10. The thermoelectric conversion device for lunar surfaces according to claim 1, wherein the reciprocating heat pipe is an S-shaped reciprocating heat pipe.
CN202010320849.2A 2020-04-22 2020-04-22 Thermoelectric conversion device for moon surface Pending CN111509117A (en)

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Application Number Priority Date Filing Date Title
CN202010320849.2A CN111509117A (en) 2020-04-22 2020-04-22 Thermoelectric conversion device for moon surface

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114229042A (en) * 2021-12-07 2022-03-25 中国空间技术研究院 Two-way coupling system based on loop heat pipe
US11388812B1 (en) 2020-12-22 2022-07-12 Hamilton Sundstrand Corporation Thermal active heat sink

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11388812B1 (en) 2020-12-22 2022-07-12 Hamilton Sundstrand Corporation Thermal active heat sink
CN114229042A (en) * 2021-12-07 2022-03-25 中国空间技术研究院 Two-way coupling system based on loop heat pipe

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