CN110957978A - Photovoltaic photo-thermal comprehensive utilization device using transparent aerogel - Google Patents
Photovoltaic photo-thermal comprehensive utilization device using transparent aerogel Download PDFInfo
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- CN110957978A CN110957978A CN201911114103.XA CN201911114103A CN110957978A CN 110957978 A CN110957978 A CN 110957978A CN 201911114103 A CN201911114103 A CN 201911114103A CN 110957978 A CN110957978 A CN 110957978A
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- comprehensive utilization
- transparent aerogel
- heat
- aerogel
- utilization device
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- 239000004964 aerogel Substances 0.000 title claims abstract description 49
- 239000011521 glass Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000002834 transmittance Methods 0.000 claims abstract description 10
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 8
- 230000005855 radiation Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004965 Silica aerogel Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/50—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings
- F24S80/56—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings characterised by means for preventing heat loss
-
- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
-
- 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
-
- 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
- Y02E10/60—Thermal-PV hybrids
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a solar photovoltaic photo-thermal comprehensive utilization device using transparent aerogel, which comprises a metal box body with a glass cover plate on the top surface, wherein a transparent aerogel, a photovoltaic cell, a heat absorption plate, a metal tube and a heat insulation layer of opaque aerogel are sequentially arranged in the box body from top to bottom. The transparent aerogel used has very low heat conductivity coefficient (0.010-0.025W/m.K), the transmittance in a wave band with the wavelength of 0.3-2.5 mu m can reach more than 80 percent, and the transmittance in an infrared spectrum range of 2.5-5.0 mu m is lower than 20 percent. The novel solar photovoltaic photo-thermal comprehensive utilization device can effectively reduce heat loss and improve the solar photovoltaic photo-thermal comprehensive utilization efficiency.
Description
Technical Field
The invention belongs to the technical field of energy utilization, and particularly relates to comprehensive application of solar photovoltaic and photothermal.
Technical Field
The solar photovoltaic photo-thermal comprehensive utilization device integrates the solar thermal collector and the photovoltaic module into one device, and can collect and utilize the redundant heat released by the photovoltaic cell, thereby improving the efficiency of solar photovoltaic photo-thermal comprehensive utilization of the unit sunlight receiving area.
At present, a solar photovoltaic photo-thermal comprehensive utilization device mostly adopts a flat plate type, and a heat absorption plate core is formed by laminating a photovoltaic cell layer and a heat absorption plate. To reduce the heat dissipation of the device, an air interlayer is typically provided between the glass cover plate and the heat sink core. Because the air has a very low heat conduction coefficient, the air interlayer can reduce the heat conduction loss of the plate core and the glass cover plate of the solar photovoltaic photo-thermal comprehensive utilization device, but convection heat exchange and radiation heat exchange still exist, and the radiation heat loss is the most important part of heat loss in the solar photovoltaic photo-thermal comprehensive utilization device. In a traditional solar thermal collector, the heat loss can be reduced by coating a photovoltaic selective absorbing coating on an absorber plate, vacuumizing the space between a glass cover plate and an absorber plate core and the like, so that the thermal efficiency of the solar thermal collector is improved. The selectively absorptive coating has a high absorptivity in the solar visible band of wavelengths from 0.3 to 2.5 μm and a low emissivity in the infrared spectral range from 2.5 to 5.0 μm, so that the collector absorbs more heat while reducing radiative heat transfer. However, in the solar photovoltaic photo-thermal comprehensive utilization device, it is difficult to coat a selective absorptive coating on the surface of the photovoltaic cell layer, and the photovoltaic cell has high emissivity in the infrared spectrum range, so that high radiation heat loss is caused. The other method is to reduce the convection heat exchange loss between the glass cover plate and the heat absorbing plate core by a vacuumizing method so as to improve the heat efficiency, and the method has high technical requirements and low weather resistance and reliability.
Disclosure of Invention
In order to effectively reduce the heat loss of the solar photovoltaic photo-thermal comprehensive utilization device and improve the solar photovoltaic photo-thermal comprehensive utilization efficiency, the invention provides the solar photovoltaic photo-thermal comprehensive utilization device using transparent aerogel.
The utility model provides an use photovoltaic light and heat comprehensive utilization device of transparent aerogel includes that the top surface is the box of glass apron 1's metal, from top to bottom sets gradually photovoltaic cell board 4 in the box, absorber plate 5 and heat preservation 3, the equipartition is equipped with a plurality of metal water pipe 6 in the heat preservation 3, the both ends of a plurality of metal water pipe 6 communicate respectively and are equipped with the collector pipe, the collector pipe 7 of one end is communicating water inlet 8, the collector pipe of the other end is communicating delivery port 9, be the heat preservation chamber between glass apron 1 and the photovoltaic cell board 4, the improvement lies in:
the transparent aerogel has a thermal conductivity of 0.010-0.025W/m.K and a density of 50-120 kg/m3The transmittance in the solar-visible light band of wavelength 0.3-2.5 μm is more than 80%, and the transmittance in the infrared spectrum range of 2.5-5.0 μm is less than 20%.
The technical scheme for further limiting is as follows:
the transparent aerogel is a silicon dioxide nano porous structure material.
The thickness of transparent aerogel 2 filled in the heat preservation cavity between the glass cover plate 1 and the photovoltaic cell panel 4 is not less than 3 mm.
And fixedly connecting the glass cover plate 1, the transparent aerogel 2 and the photovoltaic cell 4 together by adopting a mechanical laminating process.
The beneficial technical effects of the invention are embodied in the following aspects:
1. the invention adopts transparent silicon dioxide aerogel to replace an air interlayer, and the transparent aerogel is of a nano porous structure and has the characteristics of low density, low dielectric constant, low heat conductivity coefficient and high porosity. The nanoporous structure of the transparent silica aerogel makes the air molecules in the transparent silica aerogel approximately static, thus avoiding the convective heat transfer loss of air, and the curved path and the extremely low bulk density of the transparent silica aerogel nano-grid structure also prevent the heat conduction of solid and gas states. The transparent aerogel has the thermal conductivity coefficient of 0.010-0.025W/m.K, the transmittance in a wave band with the wavelength of 0.3-2.5 mu m can reach more than 80 percent, and the transparent aerogel has very low transmittance in the infrared spectrum range of 2.5-5.0 mu m; the sunlight is effectively absorbed by the photovoltaic cell panel and the aluminum plate heat absorption plate and converted into electric energy and heat energy, the heat conductivity (0.010-0.025W/m.K) of the transparent aerogel is lower than the heat conductivity coefficient (0.025W/m.K) of static air at normal temperature, and an excellent heat insulation effect can be achieved.
2. The nanoporous structure of the transparent aerogel allows the air molecules in the aerogel to be approximately stationary, thus avoiding convective heat transfer losses from the air. In the solar photovoltaic photo-thermal comprehensive utilization device, the total heat loss coefficient can be reduced by 20% by reducing the heat loss caused by convection.
3. The transparent aerogel is applied to a solar photovoltaic photo-thermal comprehensive utilization device, and can solve the problem of radiant heat loss caused by high emissivity of 0.9 on the surface of a photovoltaic cell layer. The transmittance of the transparent aerogel in the infrared spectrum range is lower than 20%, the infrared heat radiation emitted by the photovoltaic cell layer is effectively intercepted, and the radiation heat loss is reduced. The radiant heat loss is the most important part of heat loss in the solar photovoltaic photo-thermal comprehensive utilization device, and the total heat loss coefficient can be reduced by 40 percent by reducing the radiant heat loss.
In conclusion, the novel solar photovoltaic photo-thermal comprehensive utilization device using the transparent aerogel can effectively reduce the heat loss of the solar photovoltaic photo-thermal comprehensive utilization device, improve the solar photovoltaic photo-thermal comprehensive utilization efficiency and have good use and popularization values.
Drawings
Fig. 1 is a cross-sectional view of a solar photovoltaic photo-thermal comprehensive utilization device.
Fig. 2 is a structural diagram of the solar photovoltaic/photothermal integrated apparatus.
Sequence numbers in the upper figure: glass apron 1, transparent aerogel 2, opaque aerogel heat preservation 3, photovoltaic cell board 4, absorber plate 5, tubular metal resonator 6, collector pipe 7, water inlet 8, delivery port 9.
Detailed Description
The invention will be further described by way of example with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the solar photovoltaic photo-thermal comprehensive utilization device using transparent aerogel comprises a metal box body with a glass cover plate 1 on the top surface, and a transparent aerogel 2, a photovoltaic cell 4, a heat absorbing plate 5, a metal pipe 6 and an opaque aerogel heat preservation layer 3 are sequentially arranged in the box body from top to bottom. Glass apron 1, transparent aerogel 2, photovoltaic cell 4 adopt the mode of mechanical lamination to link together, and wherein the thickness of the transparent aerogel 2 of the heat preservation intracavity intussuseption between glass apron 1 and the photovoltaic cell board 4 is 3 mm. The photovoltaic cell 4 and the heat absorbing plate 5 are connected in a laminating mode of black TPT and EVA to form a heat absorbing plate core. Referring to fig. 2, metal tubes 6 are uniformly arranged on the back of the heat absorbing plate 5 by laser welding, two headers 7 are arranged at the upper end and the lower end of the back of the heat absorbing plate 5 and are respectively communicated with the metal tubes 6, the extending end of the lower header is a water inlet 8, the extending end of the upper header is a water outlet 9, and a heat insulating layer 3 made of opaque aerogel is arranged between the back of the heat absorbing plate 5 and the bottom of the box body. The thermal conductivity of the opaque aerogel thermal insulation material is generally 0.02W/m.K.
When the solar photovoltaic photo-thermal comprehensive utilization device runs, water flows in from the water inlet 8, flows through the metal pipe 6 and flows out from the water outlet 9. Sunlight penetrates through the glass cover plate 1 and the transparent aerogel 2 to be absorbed and utilized by the heat absorption plate core (the photovoltaic cell panel 4 and the heat absorption plate 5), the photovoltaic cell panel 4 absorbs the sunlight to generate electric energy, and heat is absorbed by the metal tube 6 through heat conduction and is conducted to working media flowing in the metal tube.
The transparent aerogel 2 effectively reduces convection heat loss between the heat absorbing plate core (the photovoltaic cell plate 4 and the heat absorbing plate 5) and the glass and radiation heat loss between the heat absorbing plate core and the sky, and the low heat conductivity coefficient of the heat insulating layer 3 of the opaque aerogel effectively reduces conduction heat loss. When the inlet temperature is 60 ℃, the environment temperature is 20 ℃ and the solar radiation is 800W/m2Under the conditions, the adopted transparent aerogel 2 has the transmittance of 92 percent, the thermal conductivity coefficient of 0.015W/m.K, the infrared band is not transparent, and the effective daylighting area of the solar photovoltaic photo-thermal comprehensive utilization device is 2m2The coverage rate of the cell is 70%, the thermal efficiency of the solar photovoltaic photo-thermal comprehensive utilization device adopting the transparent aerogel can reach 49%, and the total thermal loss coefficient is only 1.75.
Example 2
In the traditional solar photovoltaic photo-thermal comprehensive utilization device, the position of the transparent aerogel 2 of the top heat-insulating layer is an air interlayer, and the other structures are the same as those in embodiment 1. Under the same condition, the solar photovoltaic photo-thermal comprehensive utilization device of the traditional device is only half of the thermal efficiency of the solar photovoltaic photo-thermal comprehensive utilization device adopting the transparent aerogel. Therefore, the efficiency of the solar photovoltaic photo-thermal comprehensive utilization device can be effectively improved by adopting the transparent aerogel.
Claims (4)
1. The utility model provides an use transparent aerogel's photovoltaic light and heat comprehensive utilization device, be the box of the metal of glass apron (1) including the top surface, photovoltaic cell board (4) that set gradually from top to bottom in the box, absorber plate (5) and heat preservation (3), the equipartition is equipped with a plurality of metal water pipe (6) in heat preservation (3), the both ends of a plurality of metal water pipe (6) communicate respectively and are equipped with the collector pipe, water inlet (8) are being linked together in collector pipe (7) of one end, the collector pipe of the other end is communicating delivery port (9), be the heat preservation chamber between glass apron (1) and photovoltaic cell board (4), its characterized in that:
transparent aerogel (2) is filled in a heat insulation cavity between the glass cover plate (1) and the photovoltaic cell panel (4);
the transparent aerogel has a thermal conductivity of 0.010-0.025W/m.K and a density of 50-120 kg/m3The transmittance in the wavelength range of 0.3 to 2.5 μm is 80% or more, and the transmittance in the infrared spectrum range of 2.5 to 5.0 μm is less than 20%.
2. The photovoltaic and thermal comprehensive utilization device using transparent aerogel according to claim 1, characterized in that: the transparent aerogel is a silicon dioxide nano porous structure material.
3. The photovoltaic and thermal comprehensive utilization device using transparent aerogel according to claim 1, characterized in that: the thickness of transparent aerogel (2) filled in the heat preservation cavity between the glass cover plate (1) and the photovoltaic cell panel (4) is not less than 3 mm.
4. The photovoltaic and thermal comprehensive utilization device using transparent aerogel according to claim 1, characterized in that: and (3) adopting mechanical lamination treatment to fixedly connect the glass cover plate (1), the transparent aerogel (2) and the photovoltaic cell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114103.XA CN110957978A (en) | 2019-11-14 | 2019-11-14 | Photovoltaic photo-thermal comprehensive utilization device using transparent aerogel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114103.XA CN110957978A (en) | 2019-11-14 | 2019-11-14 | Photovoltaic photo-thermal comprehensive utilization device using transparent aerogel |
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| Publication Number | Publication Date |
|---|---|
| CN110957978A true CN110957978A (en) | 2020-04-03 |
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| CN201911114103.XA Pending CN110957978A (en) | 2019-11-14 | 2019-11-14 | Photovoltaic photo-thermal comprehensive utilization device using transparent aerogel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815541A (en) * | 2020-12-31 | 2021-05-18 | 广西赫阳能源科技有限公司 | Photovoltaic heat collector |
| CN113871506A (en) * | 2021-10-13 | 2021-12-31 | 西安交通大学 | Photovoltaic-thermoelectric coupling power generation system and method based on aerogel heat insulation and phase change temperature control |
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2019
- 2019-11-14 CN CN201911114103.XA patent/CN110957978A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815541A (en) * | 2020-12-31 | 2021-05-18 | 广西赫阳能源科技有限公司 | Photovoltaic heat collector |
| CN112815541B (en) * | 2020-12-31 | 2024-04-02 | 广西赫阳能源科技有限公司 | Photovoltaic heat collector |
| CN113871506A (en) * | 2021-10-13 | 2021-12-31 | 西安交通大学 | Photovoltaic-thermoelectric coupling power generation system and method based on aerogel heat insulation and phase change temperature control |
| CN113871506B (en) * | 2021-10-13 | 2024-04-09 | 西安交通大学 | Aerogel heat insulation and phase change temperature control-based photovoltaic-thermoelectric coupling power generation system and method |
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