CN210183244U - Solar energy temperature difference power generation device - Google Patents
Solar energy temperature difference power generation device Download PDFInfo
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- CN210183244U CN210183244U CN201921556752.0U CN201921556752U CN210183244U CN 210183244 U CN210183244 U CN 210183244U CN 201921556752 U CN201921556752 U CN 201921556752U CN 210183244 U CN210183244 U CN 210183244U
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Abstract
The utility model discloses a solar temperature difference power generation device, which comprises a shell made of heat insulation materials, wherein the top of the shell is provided with an opening, and a light transmission layer is arranged at the opening; the shell is internally provided with a cavity, and a heat collection power generation element is arranged in the cavity; the heat collection power generation element comprises a heat collection metal body, a thermoelectric power generation sheet and a cold end radiator, wherein the heat collection metal body is arranged in the middle of the cavity, and the upper surface of the heat collection metal body is coated with a heat absorption coating; the hot end of the thermoelectric power generation sheet is attached to the lower surface of the heat collection metal body through heat conduction silica gel, and the cold end radiator is attached to the cold end of the thermoelectric power generation sheet through heat conduction silica gel; the cooling cavity is filled with cooling liquid with a preset height, the cold end radiator comprises a heat conduction layer attached to the cold end of the thermoelectric generation sheet and radiating fins protruding from the lower surface of the heat conduction layer, and the lower ends of the radiating fins are partially immersed in the cooling liquid. The utility model discloses a solar energy temperature difference power generation facility utilizes solar energy directly to generate electricity, has improved solar energy's utilization efficiency and generating efficiency.
Description
Technical Field
The utility model relates to a new forms of energy technical field, concretely relates to solar energy thermoelectric generation device.
Background
Although the energy and environmental crisis have been highlighted in recent years, and the development of a group of high-performance thermoelectric conversion materials has been successful, the research of thermoelectric technology has become a hot spot again. The principle of semiconductor thermoelectric generation is that two thermoelectric conversion materials N and P of different types are combined, one end of the thermoelectric conversion material N and P is placed in a high-temperature state, and when the other end of the thermoelectric conversion material N and P is open-circuited and is provided with low temperature, due to the fact that the thermal excitation effect of the high-temperature end is strong, the concentration of holes and electrons is higher than that of the low-temperature end, the holes and the electrons are diffused to the low-temperature end under the driving of the carrier concentration gradient, and therefore a potential difference is formed at the low-; if many pairs of P-type and N-type thermoelectric conversion materials are connected to form a module, a sufficiently high voltage can be obtained to form a thermoelectric generator.
In the field of solar power generation, many engineers have noticed that the high temperature generated by concentrating solar energy is used as the high temperature end of the semiconductor thermoelectric power generation device, and then a low temperature end is used, for example, a heat collector forms a low temperature end with a temperature higher than the ambient temperature, so as to form a thermoelectric power generation device to generate power, specifically, refer to the patent No. CN200520120563.0 of "concentrating heat collection type solar thermoelectric power generation device", and the device directly utilizing the solar energy concentrating device to generate high temperature to generate power by using the thermoelectric power generation block has the problems of low power generation efficiency, low power generation amount, low practical application significance and low cost performance.
Chinese patent application No. CN201010299360.8 discloses a solar thermoelectric power generation device, which comprises a solar heat collection device consisting of a solar heat collector, a medium conduit and a medium storage, a heat conduction heat pipe and a thermoelectric generator, wherein one end of the heat conduction heat pipe is arranged in the medium storage, and the other end of the heat conduction heat pipe is connected with the thermoelectric generator. The solar thermal collector collects heat to generate high temperature to heat the heat transfer medium, so that a heat source is provided for the thermoelectric generator to generate power. However, the cold end of the thermoelectric generator only adopts a radiator for heat dissipation, the heat dissipation effect is poor, the two ends of the thermoelectric generator cannot keep large temperature difference, and the power generation efficiency is low.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a solar energy temperature difference power generation device, this temperature difference power generation device utilize solar energy directly to generate electricity, have improved solar energy utilization efficiency and generating efficiency.
In order to solve the technical problem, the utility model provides a solar thermoelectric power generation device, which comprises a shell made of heat insulation materials, wherein the top of the shell is provided with an opening, and the opening is provided with a euphotic layer; the shell is internally provided with a cavity, a heat collection power generation element is arranged in the cavity, and the cavity is divided into a heat collection cavity at the upper side and a cooling cavity at the lower side by the heat collection power generation element;
the heat collection power generation element comprises a heat collection metal body, a thermoelectric power generation sheet and a cold end radiator, wherein the heat collection metal body is arranged in the middle of the cavity, and the upper surface of the heat collection metal body is coated with a heat absorption coating; the hot end of the thermoelectric power generation sheet is attached to the lower surface of the heat collection metal body through heat conduction silica gel, and the cold end radiator is attached to the cold end of the thermoelectric power generation sheet through heat conduction silica gel;
the cooling cavity is filled with cooling liquid with a preset height, the cold end radiator comprises a heat conduction layer attached to the cold end of the thermoelectric generation sheet and radiating fins protruding from the lower surface of the heat conduction layer, and the lower ends of the radiating fins are partially immersed in the cooling liquid.
Further, the shell body sequentially comprises a shell layer, a heat insulation layer and an aluminum foil layer which are attached together from outside to inside.
Furthermore, the shell layer, the heat insulation layer and the aluminum foil layer are bonded together by high-temperature-resistant glue.
The heat insulation layer is further made of foam, a glass fiber board, an aluminum silicate fiber board, a rock wool fiber board or aerogel felt.
Furthermore, the euphotic layer is a condenser lens or a transparent aerogel layer, and the periphery of the euphotic layer is bonded to the opening at the top of the shell in a sealing mode through heat-resistant glue.
Furthermore, an automatic pressure regulating air valve is arranged on the wall of the heat collecting cavity. The automatic pressure regulating air valve has the function of automatically balancing the air pressure inside and outside the heat collecting cavity and preventing the cavity from expanding and cracking due to overlarge air pressure in the heat collecting cavity.
Furthermore, a cooling liquid inlet and a cooling liquid outlet are formed in the cavity of the cooling cavity, and the cooling liquid inlet and the cooling liquid outlet are connected to an external cooling liquid source to form cooling liquid circulation.
Further, the heat absorption coating is a black chromium coating, a black nickel coating or a PbS coating, and the thickness of the heat absorption coating is 30-50 nm.
Further, the cooling liquid is water, ethanol or glycol.
The utility model has the advantages that:
1. the thermoelectric power generation device of the utility model adopts the heat insulating material as the material of the shell, which can reduce the heat conduction and dissipation in the heat collecting cavity and ensure that the temperature in the heat collecting cavity can rise rapidly under the irradiation of sunlight; in addition, the heat absorbing coating can rapidly conduct heat to the heat collecting metal body, the heat collecting metal body has excellent heat conduction and heat storage capacity, and the hot end of the thermoelectric power generation piece is ensured to be at a higher temperature for a long time, so that the efficiency of thermoelectric power generation is improved.
2. The temperature difference power generation device of the utility model has the advantages that the heat insulation shell can reduce the influence of the external environment on the temperature in the cooling cavity, so that the temperature in the cooling cavity is kept stable; adopt cold junction radiator and coolant liquid cooperation to dispel the heat the cooling to the cold junction of thermoelectric generation piece, ensure that the cold junction is in lower temperature, improved thermoelectric generation's efficiency and stability.
Drawings
Fig. 1 is a schematic cross-sectional view of a solar thermoelectric power generation device according to an embodiment of the present invention;
the reference numbers in the figures illustrate: 100. a housing; 110. a heat collection cavity; 120. a cooling chamber; 200. a light transmitting layer; 300. a metal heat collector; 310. a heat absorbing coating; 400. a thermoelectric power generation sheet; 410. heat conducting silica gel; 500. a cold side heat sink; 510. a heat conductive layer; 520. a heat dissipating fin; 610. a coolant inlet; 620. and a cooling liquid outlet.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, an embodiment of the solar thermoelectric power generation device of the present invention includes a housing 100 made of a heat insulating material, wherein the housing 100 has an open top and a light-transmitting layer 200 is disposed at the open top. The inside of the case 100 has a cavity in which a heat collecting power generating element is disposed, which divides the cavity into a heat collecting cavity 110 at an upper side and a cooling cavity 120 at a lower side.
Specifically, the casing 100 includes a shell layer, a thermal insulation layer, and an aluminum foil layer bonded together in sequence from outside to inside. The aluminum foil layer has a heat reflection function to prevent heat in the heat collection cavity 110 from being transferred outwards, and the thermal insulation layer further prevents heat from being conducted and dissipated, so that the temperature in the heat collection cavity 110 can be ensured to be rapidly increased under the irradiation of sunlight. The shell layer is preferably made of engineering plastics, such as polypropylene, polycarbonate, ABS and the like, and has high strength and good weather resistance. The heat insulation layer is made of foam, a glass fiber board, an aluminum silicate fiber board, a rock wool fiber board or an aerogel felt. The glass fiber board, the aluminum silicate fiber board or the rock wool fiber board are common inorganic heat insulation materials, the sources are wide, the cost is low, the heat resistance and the flame retardance are good, and a heat insulation layer made of the glass fiber board, the aluminum silicate fiber board or the rock wool fiber board is small in density, high in porosity and low in heat conductivity coefficient and is an excellent heat insulation material.
The utility model discloses in, shell layer, insulating layer and aluminium foil layer bond together by high temperature resistant glue, and the glue more than 400 ℃ can be endured to preferred, for example silicone glue, phenolic resin glue, urea-formaldehyde resin glue, temperature resistant epoxy glue, polyimide glue etc..
The utility model discloses in, euphotic layer 200 optional use high printing opacity, low expansion coefficient's printing opacity glass or printing opacity membrane, preferably euphotic layer 200 is the condensing lens, and euphotic layer 200's accessible heat-resistant glue all around seals and bonds in the open-top of casing 100. In another embodiment, the light-transmitting layer 200 is a transparent aerogel layer made of a transparent aerogel material, and the light transmittance can reach more than 95%, which reaches the standard of common glass; compared with a light-transmitting film or light-transmitting glass, the heat-insulating effect is better, and heat in the heat collection cavity 110 can be prevented from dissipating. Of course, the transparent aerogel layer can also be used in combination with a frame, film or glass, for example, by being attached to the frame, film or glass, to improve strength.
Along with the temperature rise in the heat collecting cavity 110, the air pressure also rises, and in order to avoid the cavity from expanding and cracking due to the excessive air pressure in the heat collecting cavity 110, preferably, an automatic pressure regulating air valve is arranged on the cavity wall of the heat collecting cavity 110. The function is to automatically open and close according to the pressure difference between the inside and the outside of the heat collection cavity 110 to balance the pressure inside and outside the heat collection cavity 110, and meanwhile, the heat in the heat collection cavity 110 is not greatly dissipated. In another embodiment, the heat collecting chamber 110 is closed, and a partial area of the chamber wall of the heat collecting chamber 110 is made of a flexible material, and when the pressure in the heat collecting chamber 110 is too high, the flexible material area can expand to balance the internal and external pressures, and simultaneously, the dissipation of the heat in the heat collecting chamber 110 is reduced, and the structure and stability of the whole housing 100 are not affected.
The heat collection power generation element comprises a heat collection metal body, a thermoelectric power generation sheet 400 and a cold end radiator 500, wherein the heat collection metal body is arranged in the middle of the cavity, and the upper surface of the heat collection metal body is coated with a heat absorption coating 310. Preferably, an annular step is formed on the inner wall of the cavity, and the heat collecting metal body is adhered to the step through heat-resistant glue. The heat collecting metal body has excellent heat conduction and heat storage capacity, and the heat absorbing coating 310 is a black chromium coating, a black nickel coating or a PbS coating, and has a thickness of 30-50 nm, so that heat can be quickly conducted and stored in the metal heat collector 300.
The hot end (upper surface) of the thermoelectric generation piece 400 is attached to the lower surface of the heat collection metal body through the heat conductive silica gel 410. The cold-end heat sink 500 includes a heat conducting layer 510 attached to the cold end of the thermoelectric generation sheet 400 and a heat dissipating fin 520 protruding from the lower surface of the heat conducting layer 510, wherein the heat conducting layer 510 of the cold-end heat sink 500 is attached to the cold end (lower surface) of the thermoelectric generation sheet 400 through a heat conducting silica gel 410.
The cooling chamber 120 contains a predetermined height of the cooling liquid, and the lower ends of the heat dissipation fins 520 are partially immersed in the cooling liquid to timely remove heat from the heat conductive layer 510, thereby cooling the cold ends of the thermoelectric generation elements 400. The coolant may be water, ethanol or ethylene glycol.
The utility model discloses in, still be equipped with coolant liquid import 610 and coolant liquid export 620 on the cavity of cooling chamber 120, and coolant liquid import 610 and coolant liquid export 620 connect in outside coolant liquid source, and the coolant liquid flows in order to form the coolant liquid circulation between coolant liquid source and cooling chamber 120, takes away the heat in time, improves refrigerated effect. Meanwhile, the heat insulation shell of the cooling cavity 120 can reduce the influence of the external environment on the temperature in the cooling cavity 120, so that the temperature in the cooling cavity 120 is kept stable, and the stability of thermoelectric generation is improved.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (8)
1. The solar temperature difference power generation device is characterized by comprising a shell made of heat insulation materials, wherein the top of the shell is provided with an opening, and a light transmission layer is arranged at the opening; the shell is internally provided with a cavity, a heat collection power generation element is arranged in the cavity, and the cavity is divided into a heat collection cavity at the upper side and a cooling cavity at the lower side by the heat collection power generation element;
the heat collection power generation element comprises a heat collection metal body, a thermoelectric power generation sheet and a cold end radiator, wherein the heat collection metal body is arranged in the middle of the cavity, and the upper surface of the heat collection metal body is coated with a heat absorption coating; the hot end of the thermoelectric power generation sheet is attached to the lower surface of the heat collection metal body through heat conduction silica gel, and the cold end radiator is attached to the cold end of the thermoelectric power generation sheet through heat conduction silica gel;
the cooling cavity is filled with cooling liquid with a preset height, the cold end radiator comprises a heat conduction layer attached to the cold end of the thermoelectric generation sheet and radiating fins protruding from the lower surface of the heat conduction layer, and the lower ends of the radiating fins are partially immersed in the cooling liquid.
2. The solar thermoelectric generation device of claim 1, wherein the housing comprises a polypropylene layer, a thermal insulation layer and an aluminum foil layer bonded together in sequence from outside to inside.
3. The solar thermoelectric generation device of claim 2, wherein the thermal insulation layer is made of foam, glass fiber board, aluminum silicate fiber board, rock wool fiber board or aerogel felt.
4. The solar thermoelectric generation device of claim 1, wherein the transparent layer is a condenser or a transparent aerogel layer, and the periphery of the transparent layer is bonded to the top opening of the housing by a heat-resistant adhesive in a sealing manner.
5. The solar thermoelectric generation device of claim 1, wherein an automatic pressure-regulating air valve is disposed on a wall of the heat collection chamber.
6. The solar thermoelectric generation device according to claim 1, wherein the cooling cavity has a cooling fluid inlet and a cooling fluid outlet, and the cooling fluid inlet and the cooling fluid outlet are connected to an external cooling fluid source to form a cooling fluid circulation.
7. The solar thermoelectric generation device according to claim 1, wherein the heat absorption coating is a black chromium coating, a black nickel coating, or a PbS coating, and has a thickness of 30 to 50 nm.
8. The solar thermoelectric generation device of claim 1, wherein the coolant is water, ethanol, or ethylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921556752.0U CN210183244U (en) | 2019-09-18 | 2019-09-18 | Solar energy temperature difference power generation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921556752.0U CN210183244U (en) | 2019-09-18 | 2019-09-18 | Solar energy temperature difference power generation device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111700471A (en) * | 2020-06-23 | 2020-09-25 | 邓艳丽 | Self-rotating sock clamping frame |
| CN113193788A (en) * | 2021-05-25 | 2021-07-30 | 河海大学 | Wind-solar hybrid thermoelectric power generation device |
| JP7421425B2 (en) | 2020-06-25 | 2024-01-24 | カヤバ株式会社 | thermal power generation device |
| JP7469967B2 (en) | 2020-06-25 | 2024-04-17 | カヤバ株式会社 | Thermoelectric power generation device |
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2019
- 2019-09-18 CN CN201921556752.0U patent/CN210183244U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111700471A (en) * | 2020-06-23 | 2020-09-25 | 邓艳丽 | Self-rotating sock clamping frame |
| JP7421425B2 (en) | 2020-06-25 | 2024-01-24 | カヤバ株式会社 | thermal power generation device |
| JP7469967B2 (en) | 2020-06-25 | 2024-04-17 | カヤバ株式会社 | Thermoelectric power generation device |
| CN113193788A (en) * | 2021-05-25 | 2021-07-30 | 河海大学 | Wind-solar hybrid thermoelectric power generation device |
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Effective date of registration: 20210730 Address after: 215000 699 Maopeng Road, Xukou Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: SUZHOU JUNYUE NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: Room 2321, building 4, Pingshang commercial center, 1168 Xiangcheng Avenue, Xiangcheng District, Suzhou City, Jiangsu Province 215000 Patentee before: Suzhou qichuangxin Material Technology Co.,Ltd. |
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