CN214505513U - Self-cooling back plate and photovoltaic module - Google Patents
Self-cooling back plate and photovoltaic module Download PDFInfo
- Publication number
- CN214505513U CN214505513U CN202121003837.3U CN202121003837U CN214505513U CN 214505513 U CN214505513 U CN 214505513U CN 202121003837 U CN202121003837 U CN 202121003837U CN 214505513 U CN214505513 U CN 214505513U
- Authority
- CN
- China
- Prior art keywords
- back plate
- main body
- working medium
- plate main
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 238000001704 evaporation Methods 0.000 claims abstract description 31
- 230000008020 evaporation Effects 0.000 claims abstract description 30
- 238000009833 condensation Methods 0.000 claims abstract description 27
- 230000005494 condensation Effects 0.000 claims abstract description 27
- 238000010248 power generation Methods 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 230000017525 heat dissipation Effects 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to the technical field of photovoltaic power generation, and provides a self-cooling back plate, which comprises a back plate main body and a working medium runner arranged in the back plate main body; the working medium flow channel forms an evaporation area and a condensation area in the back plate main body; the back plate main body is provided with an air passing hole which is convenient for air flow exchange at two sides of the back plate main body at the condensation area; when the photovoltaic back plate is used, the evaporation area of the back plate main body is configured on the photovoltaic module and used for cooling the photovoltaic module through evaporation and heat absorption of working media in the working medium flow channel, and the condensation area of the back plate main body is exposed on the photovoltaic module and improves the heat dissipation rate through air flow passing through the air inlet.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field, concretely relates to from cooling backplate and photovoltaic module.
Background
In the process of generating electricity, the surface temperature of the existing solar photovoltaic panel changes synchronously along with the change of sunshine. At a period of time after noon, sunlight is the strongest, the temperature of the surface of the photovoltaic panel is the highest, and at the moment, because the overhigh temperature exceeds the optimal working condition range of the photovoltaic panel (internal electronic components), the power generation efficiency of the photovoltaic panel is reduced, so that the photovoltaic panel needs to be cooled to be within the optimal working condition temperature range, and the power generation efficiency is improved.
For this reason, a chinese patent with application number 2021201882156 appeared, which discloses a photoelectric and photothermal integrated assembly, including tempered glass, transparent EVA, a photovoltaic power generation main body, a heat absorption back plate, and an outer frame for fixing; the heat absorption back plate is internally provided with a working medium flow passage for absorbing heat and reducing temperature of the photovoltaic power generation main body through a working medium in the working medium flow passage and exchanging heat with the outside.
Although the photovoltaic module of this structure can be through concentrating on a subassembly with photovoltaic power generation and light and heat energy recovery in, set up the working medium runner in the heat absorption backplate, utilize the working medium to cool down the photovoltaic power generation main part to improve its photovoltaic power generation efficiency, because through the heat absorption cooling of working medium in the heat absorption backplate, make the photovoltaic power generation main part be in the work condition work under the lower operating mode of temperature, thereby prolong its life. However, the back plate in the photovoltaic module with the structure has low heat dissipation efficiency, needs to be externally connected with a compression device, a heat exchange device and a throttling component, and forms a photo-thermal circulation loop. Thus, additional power is required to adequately cool the photovoltaic device.
Therefore, the conventional photovoltaic module lacks a self-cooling back plate which is high in heat dissipation efficiency and independent of an external circulation system and an external power supply for driving.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome above-mentioned current photovoltaic module backplate from the low defect that just wants external power supply of radiating efficiency, provide a from cooling backplate and photovoltaic module.
In order to achieve the above object, the present invention is achieved in a first aspect by the following technical solutions: a self-cooling back plate comprises a back plate main body and a working medium flow passage arranged in the back plate main body; the working medium flow channel forms an evaporation area and a condensation area in the back plate main body; the back plate main body is provided with an air passing hole which is convenient for air flow exchange at two sides of the back plate main body at the condensation area; when the photovoltaic back plate is used, the evaporation area of the back plate main body is configured on the photovoltaic module and used for cooling the photovoltaic module through evaporation and heat absorption of working media in the working medium flow channel, and the condensation area of the back plate main body is exposed on the photovoltaic module and improves the heat dissipation rate through air flow passing through the air inlet.
The utility model discloses further preferred scheme does: the back plate main body is a metal product and is formed by an extrusion process; and a support bar is formed between two adjacent working medium flow passages, and the air passing port penetrates through the support bar of the condensation area.
The utility model discloses further preferred scheme does: the back plate main body is an aluminum alloy product.
The utility model discloses further preferred scheme does: the working medium filled in the working medium flow passage of the back plate main body is a refrigerant.
The utility model discloses further preferred scheme does: the working medium flow passage is a direct flow passage, and a gaseous communication area is formed at the end part of the working medium flow passage positioned in the condensation area through a communicating pipe.
The utility model discloses further preferred scheme does: the working medium flow passage is a direct flow passage, and a liquid state balance area is formed at the end part of the working medium flow passage positioned in the evaporation area through a communicating pipe.
The utility model discloses further preferred scheme does: the cross section of the working medium flow passage is circular, oval or polygonal.
The utility model discloses further preferred scheme does: the heat exchanger is characterized in that fins for improving heat exchange efficiency by increasing contact area are arranged in the working medium flow channel, and the fins extend along the length direction of the working medium flow channel.
The utility model discloses further preferred scheme does: the thickness of the back plate main body is [1,8] mm.
The utility model provides a photovoltaic module in a second aspect, which comprises toughened glass, transparent EVA, a photovoltaic power generation main body, a self-cooling back plate as in the first aspect, and an outer frame for fixing; the evaporation area of the back plate main body is tightly attached to the photovoltaic power generation main body; and a heat insulating layer is arranged on the other surface of the back plate main body.
To sum up, the utility model discloses following beneficial effect has: in the evaporation area, the photovoltaic power generation main body is cooled by evaporating and absorbing heat of the liquid working medium in the working medium flow passage, the gas working medium after heat absorption floats upwards and enters the condensation area, and the condensation area is provided with the air passing opening, so that the gas working medium can fully exchange heat with the outside through the air passing opening, and the efficiency is high, therefore, the gas working medium passing through the condensation area can fall back to the evaporation area due to gravity after being cooled, and the circulation is repeated, so that the photovoltaic self-cooling is realized, and the power generation capacity can be improved by more than 10%; the utility model discloses a from cooling backplate and photovoltaic module simple structure, it is few to current photovoltaic board change, need not outer circulation system and external power supply, no extra power consumption.
Drawings
Fig. 1 is an exploded view of the photovoltaic module described in example 1.
Fig. 2 is a schematic structural view of the photovoltaic module described in example 1.
FIG. 3 is a cross-sectional view of the self-cooling backing plate of FIG. 2 taken along A-A.
FIG. 4 is a partial cross-sectional view of the self-cooling backing plate of FIG. 3 taken along the direction B-B.
FIG. 5 is a partial cross-sectional view of the self-cooling backing plate taken along the direction B-B in example 2.
Wherein:
100. tempering the glass; 300. a photovoltaic power generation main body; 400. a back plate main body; 410. a working medium flow passage; 411. a fin; 412. a supporting strip; 420. an evaporation zone; 430. a condensation zone; 431. an air passing port; 500. a heat insulating layer; 600. an outer frame.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1:
as shown in fig. 1 and 2, the present embodiment shows a photovoltaic module, which includes a tempered glass 100, a transparent EVA, a photovoltaic power generation main body 300, a self-cooling back sheet, and an outer frame 600 for fixing. Transparent EVA laminates in photovoltaic power generation board both sides and forms photovoltaic power generation 300, and the back of photovoltaic power generation main part 300 is closely laminated with the surface (being located the front) of self-cooling backplate. And finally, secured together by the outer frame 600.
The self-cooling back plate comprises a back plate main body 400 and a working medium flow channel 410 arranged in the back plate main body 400. The back plate body 400 is made of metal, in this embodiment, aluminum alloy, and is formed by an extrusion process, and the working medium flow channel 410 inside the back plate body is a straight flow channel (i.e., arranged in a straight line). In this embodiment, 20 straight flow channels are adopted, the 20 straight flow channels are arranged side by side and extend from one end of the back plate main body 400 to the other end of the back plate main body 400, and an evaporation area 420 and a condensation area 430 are formed in the back plate main body 400. Wherein the region combined with the photovoltaic power generating main body 300 is an evaporation region 420, and wherein the region located outside the photovoltaic power generating main body 300 is a condensation region 430. In use, the photovoltaic module is tilted such that the condensation zone 430 is located at the upper end of the evaporation zone 420.
And air vents 431 for facilitating air flow exchange at two sides of the back plate main body 400 are arranged at the condensation area 430. When the back plate main body 400 is used, the evaporation area 420 of the back plate main body 400 is configured on the photovoltaic module to cool the photovoltaic module through evaporation and heat absorption of the working medium in the working medium flow channel 410, and the condensation area 430 of the back plate main body 400 is exposed on the photovoltaic module and increases the heat dissipation rate through the air flow passing through the air inlet 431.
As shown in fig. 3, in the extrusion process, a support strip 412 is formed between two adjacent working medium flow channels 410, and an air vent 431 penetrates through the support strip 412 of the condensation area 430, so that air at the condensation area 430 can pass through the air vent 431 when the air circulates up and down, thereby carrying away heat.
The working medium filled in the working medium channel 410 of the backplate main body 400 is a refrigerant, freon is selected in the embodiment, the working medium channel 410 is vacuumized before filling, and then a proper amount of freon is injected.
In order to balance the air pressure in the working fluid channel 410, the working fluid channel 410 forms a gaseous communication region at the upper end of the condensation region 430 by a communication pipe, and forms a liquid balance region at the lower end of the evaporation region 420 by a communication pipe.
As shown in fig. 4, working medium channel 410 has a rectangular cross section in the present embodiment. But may also be circular, oval or polygonal. In embodiment 2, working medium flow channel 410 with a circular cross section is adopted, and particularly, referring to fig. 5, detailed description is omitted here.
In order to improve heat exchange efficiency, a fin 411 for improving heat exchange efficiency by increasing a contact area is provided in the working medium flow passage 410, and the fin 411 extends in a length direction of the working medium flow passage 410.
In order to ensure sufficient evaporation and improve the cooling efficiency of the evaporation zone on the photovoltaic module, the heat insulating layer 500 is arranged on the other side (back side) of the self-cooling back plate, and the heat insulating layer 500 is a foam board (or other heat insulating coatings) and is mainly arranged in the evaporation zone 420, so that the evaporation zone 420 and the condensation zone 430 form pressure difference, and the gaseous working medium flows along the length direction of the working medium flow channel 410. If the heat insulating layer is not arranged, and sufficient pressure difference cannot be formed between the evaporation area 420 and the condensation area 430, the heat absorption evaporation of the working medium in the evaporation area 420 is not severe enough, and the steam movement is relatively slow, so that the cooling efficiency of the evaporation area 420 to the photovoltaic module is reduced.
Claims (10)
1. A self-cooling back plate comprises a back plate main body and a working medium flow passage arranged in the back plate main body; the working medium flow channel forms an evaporation area and a condensation area in the back plate main body; the back plate main body is provided with an air passing hole which is convenient for air flow exchange at two sides of the back plate main body at the condensation area; when the photovoltaic back plate is used, the evaporation area of the back plate main body is configured on the photovoltaic module and used for cooling the photovoltaic module through evaporation and heat absorption of working media in the working medium flow channel, and the condensation area of the back plate main body is exposed on the photovoltaic module and improves the heat dissipation rate through air flow passing through the air inlet.
2. The self-cooling back plate according to claim 1, wherein the back plate body is a metal product formed by an extrusion process; and a support bar is formed between two adjacent working medium flow passages, and the air passing port penetrates through the support bar of the condensation area.
3. The self-cooling back plate according to claim 2, wherein the back plate body is an aluminum alloy product.
4. The self-cooling back plate of claim 1, wherein the working medium filled in the working medium flow channel of the back plate main body is a refrigerant.
5. The self-cooling back plate according to claim 1, wherein the working medium flow channel is a direct flow channel, and a gaseous communication area is formed at the end part of the working medium flow channel located in the condensation area through a communication pipe.
6. The self-cooling back plate according to claim 1, wherein the working medium flow channel is a direct flow channel, and a liquid equilibrium region is formed at the end of the working medium flow channel located in the evaporation region by a communicating pipe.
7. The self-cooling back plate according to claim 1, wherein the cross section of the working medium flow channel is circular, elliptical or polygonal.
8. The self-cooling back plate according to claim 7, wherein fins for increasing heat exchange efficiency by increasing contact area are provided in the working fluid flow channel, and the fins extend along the length direction of the working fluid flow channel.
9. The self cooling backsheet according to claim 1, wherein the backsheet body has a thickness of [1,8] mm.
10. A photovoltaic module comprising tempered glass, transparent EVA, a photovoltaic power generation body, the self-cooling back sheet of any one of claims 1-9, and an outer frame for fixation; the photovoltaic power generation back plate is characterized in that the evaporation area of the back plate main body is tightly attached to the photovoltaic power generation main body; and a heat insulating layer is arranged on the other surface of the back plate main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121003837.3U CN214505513U (en) | 2021-05-06 | 2021-05-06 | Self-cooling back plate and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121003837.3U CN214505513U (en) | 2021-05-06 | 2021-05-06 | Self-cooling back plate and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214505513U true CN214505513U (en) | 2021-10-26 |
Family
ID=78204823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121003837.3U Active CN214505513U (en) | 2021-05-06 | 2021-05-06 | Self-cooling back plate and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214505513U (en) |
-
2021
- 2021-05-06 CN CN202121003837.3U patent/CN214505513U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101236273B1 (en) | Solar panel cooling without power consumption | |
| CN111106411B (en) | Power battery module based on loop heat pipe and phase-change material coupling cooling | |
| CN215062969U (en) | Refrigeration module based on semiconductor refrigeration piece | |
| CN211782035U (en) | Multifunctional double-cold condenser heat pipe photovoltaic photo-thermal system | |
| CN111327270A (en) | Double-cold-condenser heat pipe type photovoltaic photo-thermal module-super-Lambert wall system and method | |
| CN102563891A (en) | Capillary tube radiation cooling type photovoltaic electricity and heat combined using device | |
| CN111306814B (en) | Multifunctional double-cold condenser heat pipe photovoltaic photo-thermal system and method | |
| CN214505513U (en) | Self-cooling back plate and photovoltaic module | |
| KR20030095937A (en) | Solar energy collecting device with a thermal conductor, and water heating apparatus using the solar energy collecting device | |
| CN202064542U (en) | Photovoltaic photo-thermal element adopting heat pipes for heat dissipation | |
| CN202889858U (en) | Double-sided water cooling heat radiation plate | |
| CN116241931A (en) | Domestic hot water heating system for cooling photovoltaic module | |
| CN203118978U (en) | U-shaped pipe fin type dual-medium intensified radiation photovoltaic optothermal integrated device | |
| CN212034083U (en) | Special Lambert wall system adopting double-cold-condenser heat pipe type photovoltaic photo-thermal module | |
| CN211084467U (en) | Photovoltaic and photo-thermal integrated device capable of radiating and refrigerating at night | |
| CN213627767U (en) | Auto radiator hydroecium with quick heat dissipation cooling function | |
| CN209357740U (en) | A kind of device of solar generating with radiator | |
| CN213905373U (en) | Photoelectric and photo-thermal integrated assembly | |
| CN211595597U (en) | Cold-heat exchanger | |
| CN221328923U (en) | Novel concentrating photovoltaic cell panel device | |
| CN105485969B (en) | Heat-exchanger rig and semiconductor freezer with the heat-exchanger rig | |
| CN211127718U (en) | Solar photovoltaic module | |
| CN2227313Y (en) | Heat exchanger for thermoelectric refrigeration machine | |
| CN211601673U (en) | Phase change radiator | |
| CN216897488U (en) | Double-water-tank heat collection and supply system based on refrigerant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A self cooling backplane and photovoltaic module Granted publication date: 20211026 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Huzhou Changxing sub branch Pledgor: ZHEJIANG SHIZI NEW ENERGY TECHNOLOGY CO.,LTD. Registration number: Y2024980023247 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |