CN201621887U - Composite-type flat-plate solar-energy heat collecting plate - Google Patents
Composite-type flat-plate solar-energy heat collecting plate Download PDFInfo
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- CN201621887U CN201621887U CN2010201194590U CN201020119459U CN201621887U CN 201621887 U CN201621887 U CN 201621887U CN 2010201194590 U CN2010201194590 U CN 2010201194590U CN 201020119459 U CN201020119459 U CN 201020119459U CN 201621887 U CN201621887 U CN 201621887U
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- heat collecting
- plate
- collecting plate
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- solar
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- 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
- Y02E10/44—Heat exchange systems
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Abstract
The utility model discloses a composite-type flat-plate solar-energy heat collecting plate, which is formed by integral structures, of which units are connected through couplings made of shape memory alloy, and the integral structure is formed through combination of a heat collecting plate, a black chromium selective absorption membrane, a metal pipeline for hot medium, and transparent heat insulation material. With perfect combination of black chromium and SiO2 aerogel, the solar-energy heat collecting plate enables the black chromium selective absorption membrane to be firmly combined on the heat collecting plate and solves a key problem that restricts the production of solar-energy heat collecting plates through SiO2 aerogel; shape memory alloy is applied on couplings to enable the integral structural units to be combined more conveniently and to realize good sealing performance. Further, transparent heat insulation characteristic of SiO2 aerogel is adopted and the selective absorption membrane, the heat collecting plate and the metal pipeline for hot medium are sealed , and therefore the composite-type flat-plate solar-energy heat collecting plate not only improves the heat utilization efficiency of solar energy, but also remarkably enhances the strength of transparent insulation material, and additionally enables the flat-plate solar energy heat collector to be lightened, simplified and miniaturized.
Description
Technical field
The utility model relates to a kind of flat plate solar collector with combined type sun set hot plate, belongs to solar energy heat utilization field, further belongs to solar energy and architecture-integral field.
Background technology
Along with the development of World Economics and the raising of living standards of the people, will constantly increase the demand of the energy, development and utilization new forms of energy (particularly solar energy) have great importance.Utilize the approach of solar energy a lot, mainly contain solar thermal utilization, heat power, heat generating and the direct conversion of photoelectricity etc.In the present most widely used helioplant, the parts-absorption solar radiation of two keys is all arranged and be converted into the baffle of heat energy and can see through solar radiation and can reduce heat and conduct the heat waste that causes and stop the long wave heat radiation to reduce the transparent heat-insulated cover plate of heat waste.
Along with solar energy utilizes the continuous development of research work, be born many new materials and new technology are as spectrum selective paint, vacuum heat collection pipe and all kinds of transparent insulate material and device etc.Transparent insulate material wherein (Transparent Insulation Materials (be called for short TIMs)) ability with its high transmitance and good inhibition convection current heat waste gains great popularity.
Serious day by day along with environmental problem and energy problem, solar energy is as inexhaustible, nexhaustible novel clean energy resource, and it utilizes field and degree to be subjected to the countries in the world extensive concern day by day, presses for the sun set hot plate thermal conversion efficiency rate that improves.
Transparent insulate material or parts are one of parts very crucial in the solar heat collector.As known, the sun set hot plate mainly is divided into plate and vacuum tube type, and the plate main flow that is developing into the sun set hot plate simple in structure and that reduce cost easily.
Yet plate type heat collecting plate is big because of the heat loss that its convection current, conduction cause, compares with vacuum tube type, more needs thermal insulation.As existing plate insulation method, the dual glass of use and transparent honeycomb structure etc. are arranged, use polyurethane foam heat insulation material or fibre thermal-insulation material in the bottom.For the heat insulation and preservation effect that obtains, this structure causes thermal-arrest plate weight to increase.
Carried out various research work for the thermal transition efficient that improves flat plate type solar heat collecting plate, opened 9-217961 communique, Japan Patent spy the Japan Patent spy and open in No. 2002.130835 communiques and a lot of document report is all arranged.
SiO
2Aeroge has unique nano-pore structure and high porosity height because of it, be the present minimum a kind of light heat-insulating material of the coefficient of heat conduction in the solid material of finding, as super insulating material and by known, and, its visible light transmissivity height, light specific gravity (is about 100kg/m
3), be the very desirable transparent heat-insulating material of sun set hot plate.But, SiO
2The mechanical strength of aeroge is low, need pay special attention in the use, and up to the present its case of successfully using is actually rare, opens 2002-130835 and Chinese patent CN1890511A as Japanese patent laid-open 9-217961 and Japan Patent spy.They mainly are by be paved with block SiO on absorber plate
2Aeroge forms heat insulation layer thus.But this structure usually can be because of absorber plate and SiO
2Gap between the aeroge and cause that cross-ventilation causes the heat loss problem.In addition, because of SiO
2The mechanical strength of aeroge very a little less than, have easy impaired problem in the assembling process.Chinese patent CN1890511A discloses a kind of solar heat-collection plate structure unit.Though this patent can improve the free degree that sun set hot plate shape is set, but, this solar heat-collection unit need could form solar heat-collection slab integral structure by more electrical connector, it has not only increased installation difficulty, cause time-consuming, and easily cause the damage of solar heat-collection plate structure unit, use difficulty to increase thereby cause.On the other hand, its selective absorbing film is TiOxNy, because this selective absorbing film and copper absorber plate interface binding power are relatively poor, in the supercritical drying process, often cause the TiOxNy film to come off from the copper absorber plate because of the different thermal stress that produce of the thermal coefficient of expansion of the two, and the solar energy that makes absorption can't pass to absorber plate effectively, causes thermal transition efficient to fall flat.
The utility model content
In view of above-mentioned technical problem, the purpose of this utility model is: provide a kind of and simplify that slab construction and heat-insulating property are better than obviously that prior art level and selective absorbing film and copper absorber plate have adhesion preferably and the sun set hot plate that brings high thermal conversion efficiency.
Composite flat plate type solar heat collecting plate of the present utility model, be spliced with the integral structure unit that metallic conduit and transparent heat-insulating material were compounded to form by thermal-arrest plate, black chromium selective absorbing film, thermal medium, described thermal medium is incorporated into the one side of thermal-arrest plate with metallic conduit, another side at the thermal-arrest plate is coated with black chromium selective absorbing film (thickness range of black chromium selective absorbing film is 10～50 μ m, preferred 20～30 μ m); Transparent heat-insulating material will be combined with in thermal medium is included in metallic conduit and the thermal-arrest plate that is coated with black chromium selective absorbing film, form the integral structure unit.Thermal medium is connected with the pipe joint that an energy is connected with other integral structure unit respectively with the two ends of metallic conduit, and described pipe joint material is copper base or Ti-Ni marmem.
Described marmem is CuZnAl system, CuAlNi system or TiNi system.Be preferably CuZnAl system or CuAlNi system.
Described transparent heat-insulating material is SiO
2Aeroge.
Described integral structure unit is that the length of side is 800-1200mm * 150-250mm, and thickness is the cuboid of 15-25mm; Be not particularly limited the preferred good copper of heat conductivity as thermal-arrest plate and thermal medium metal material kind with metallic conduit.
The beneficial effects of the utility model:
1, the utility model can link adjacent integral structure unit by described pipe joint, thereby can form the size of needed composite flat plate type solar heat collecting plate.Because the size of integral structure of the present utility model unit and unique rectangular shape are more reasonable, only are provided with a spot of pipe joint, just can very simple construction unit be linked together, and form whole flat plate type solar heat collecting plate.Key is that to have chosen copper base or Ti-Ni marmem first be the manufacturing field that the material of pipe joint is applied to the sun set hot plate in addition, it utilizes the unidirectional shape of the one way shape-memory effect of marmem to recover, be that marmem is out of shape under lower temperature, the shape before the heating back recoverable deformation; Interface is tight, and drip (oil) does not leak.Its sealing effectiveness outclass welding, and easy and simple to handle, practicality and structure are very compact.Therefore, be specially adapted to the high-efficient flat-plate heat collector that solar energy and architecture-integral are used.
2, the thermal-arrest plate is coated with black chromium selective absorbing film, black chromium have with titanium oxynitrides same absorb the solar radiation wavelength light preferably and the outside character of infrared radiation wavelength light not, but the titanium oxynitrides coating is to adopt magnetically controlled sputter method to form usually, the adhesion of itself and thermal-arrest plate is relatively poor, when supercritical drying, when especially adopting the high temperature supercritical drying, because of the influence of thermal stress, very easily cause selective absorbing film in conjunction with insecure and come off, and easily break from the thermal-arrest board substrate; This also is that restriction utilizes SiO
2Aeroge prepares the main cause of sun set hot plate.The inventor adds up and adopts titanium oxynitrides coating and SiO
2Aeroge prepares compound integrated unit, and titanium oxynitrides coating shedding rate reaches more than 50%.Black chromium then adopts the method for electrochemical method deposition to be coated on the thermal-arrest plate, and it has better adhesion than titanium oxynitrides; No matter adopting low temperature supercritical drying drying process still is that high temperature supercritical drying drying process all can be realized firmly complete being attached on the thermal-arrest plate of selective absorbing film; Black chromium selective absorbing film does not have fully and comes off, almost the crack-free phenomenon.Also nobody will deceive chromium selective absorbing film and SiO at present
2The aeroge combination, and the two combination has brought good effect; The sun set hot plate integral structure of the present utility model unit coefficient of heat conduction is lower than 0.82W/m
2K; The outlet heat medium temperature can improve more than 51%, so this is an another considerable advantage of the present utility model.
3, SiO
2Aeroge is because porosity height and pyroconductivity are extremely low, and by known, and because the transmission of visible light height, and proportion is low (is about 100kg/m as the high-performance heat-insulating material
3), be suitable as very much the transparent heat-insulating material of solar heat-collection plate.
Though 4 SiO
2The intensity of aeroge is very low, but in the utility model, because SiO
2Aeroge is strengthened by the compound thermal-arrest plate in inside, has improved SiO
2The practicality of aeroge.Subsequently, SiO
2Aeroge is coated by glass and polymer etc., also can further improve intensity, thereby satisfies the practicality requirement.
5, in addition, integral structure of the present utility model unit is because be coated with the thermal-arrest plate of selective absorbing film and pipeline by SiO
2Aeroge institute integral coating, very close to each other between them, so can not cause cross-ventilation, the heat-insulating property of this integral structure unit is very good.
Description of drawings
Fig. 1 is the schematic diagram of integral structure of the present utility model unit;
1 is the thermal-arrest plate among the figure, and 2 are the thermal medium metal tube, and 3 is SiO
2Aeroge, 4 is pipe joint.
Fig. 2 is the process chart of preparation integral structure unit;
1 is the thermal-arrest plate among the figure, and 2 are the thermal medium metal tube, and 3 is SiO
2Aeroge, 4 is pipe joint, 5 is SiO
2Colloidal sol, 6 is SiO
2Wet gel, 7 is mould.
Fig. 3 is the flat plate type solar heat collecting plate schematic diagram that integral structure of the present utility model unit constitutes.
The specific embodiment
The utility model is described in further detail by the following examples, but protection domain is not subjected to the restriction of these embodiment.
The utility model comprises integral structure unit that thermal-arrest plate, black chromium selective absorbing film, thermal medium are compounded to form with metallic conduit and the transparent heat-insulating material (see figure 3) that is spliced, described thermal medium is incorporated into the one side of thermal-arrest plate with metallic conduit, another side at the thermal-arrest plate is coated with black chromium selective absorbing film (thickness range of black chromium selective absorbing film is 10～50 μ m, preferred 20～30 μ m); Transparent heat-insulating material will be combined with in thermal medium is included in metallic conduit and the thermal-arrest plate that is coated with black chromium selective absorbing film, form the integral structure unit.The described integral structure unit preferably length of side is 800-1200mm * 150-250mm, and thickness is the cuboid of 15-25mm; Thermal medium is connected with the pipe joint that an energy is connected with other integral structure unit respectively with the two ends of metallic conduit, and described pipe joint material is copper base or Ti-Ni marmem Connection Element (see figure 1).
Concrete joint connection procedure is as follows: at first be processed into internal diameter connects the external diameter little 4% of thermal medium metal tube than desire casing joint with marmem, then under liquid nitrogen temperature with casing joint hole enlargement about 8%, during assembling this sleeve pipe is taken out from liquid nitrogen, the pipe that desire is connected inserts from two ends.When temperature was increased to normal temperature, pipe joint mouth place marmem deformed, and sleeve pipe shrinks and promptly forms fit sealing.
In following examples, the integral structure unit is the rectangle that the length of side is about 1000mm * 200mm, and thickness is approximately 20mm.
With ethyl orthosilicate, dimethyldiethoxysilane, absolute ethyl alcohol, deionized water, hydrochloric acid, ammoniacal liquor 1: 0.05: 7 in molar ratio: 3: 0.002: 0.004, be made into Ludox with two-step method, be cast in then to set in advance and be combined with thermal medium with metallic conduit be coated with in the mould of thermal-arrest plate of selective absorbing film of black chromium, the thickness of black chromium selective absorbing film is 25 μ m; Make out wet gel formed body, compound wet gel formed body after under the room temperature aging 1 day, is put into autoclave, preliminary filling N with composite construction
2To 3.0MPa, be heated to 260 ℃ with the programming rate of 60 ℃/h, constant temperature kept temperature-resistant after 2 hours, with the slow release pressure of speed of 3MPa/h, to the normal pressure with N
2Dash and swept autoclave 30 minutes, powered-down cools off it naturally, can make the sun set hot plate integral structure unit with composite construction, and its compression strength is 1.10MPa, and the sun set hot plate integral structure unit coefficient of heat conduction is 0.71W/m
2K.Then the two-port of the pipeline of each unit pipe joint by the processing of CuZnAl memorial alloy is combined, promptly become the solar heat-collection plate.The selective absorbing film combination of black chromium very firm do not have broken phenomenon.Compare with existing flat plate collector product, the outlet heat medium temperature has improved 71%.
With ethyl orthosilicate, absolute ethyl alcohol, deionized water, hydrochloric acid, ammoniacal liquor 1: 6: 3 in molar ratio: 0.002: 0.003, be made into Ludox with two-step method, be cast in then to set in advance and be combined with pipeline and be coated with in the mould of thermal-arrest plate of selective absorbing film of black chromium, the thickness of black chromium selective absorbing film is 25 μ m; Make out the wet gel formed body with composite construction, compound wet gel formed body after under the room temperature aging 1 day, is adopted embodiment 1 described supercritical drying drying process, wherein baking temperature is 250 ℃, and can make the coefficient of heat conduction is 0.79W/m
2The sun set hot plate integral structure unit of K.Be that the pipe joint of memorial alloy processing combines with the two-port of the pipeline of each unit by CuAlNi then, promptly become the solar heat-collection plate.The selective absorbing film combination of black chromium very firm do not have broken phenomenon.Compare with existing flat plate collector product, the outlet heat medium temperature has improved 57%.
With ethyl orthosilicate, absolute ethyl alcohol, deionized water, hydrochloric acid, ammoniacal liquor 1: 7: 3 in molar ratio: 0.001: 0.002, be made into Ludox with two-step method, be cast in then to set in advance and be combined with pipeline and be coated with in the mould of thermal-arrest plate of selective absorbing film of black chromium, the thickness of black chromium selective absorbing film is 20 μ m; Make out the wet gel formed body with composite construction, compound wet gel formed body after under the room temperature aging 1 day, is adopted embodiment 1 described supercritical drying drying process, wherein baking temperature is 280 ℃, and can make the coefficient of heat conduction is 0.77W/m
2The sun set hot plate integral structure unit of K.Be that the pipe joint of memorial alloy processing combines with the two-port of the pipeline of each unit by CuAlNi then, promptly become the solar heat-collection plate.The selective absorbing film combination of black chromium very firm do not have broken phenomenon.Compare with existing flat plate collector product, the outlet heat medium temperature has improved 61%.
With ethyl orthosilicate, dimethyldiethoxysilane, absolute ethyl alcohol, deionized water, hydrochloric acid, ammoniacal liquor 1: 0.05: 9 in molar ratio: 3: 0.002: 0.004, be made into Ludox with two-step method, be cast in then to set in advance and be combined with pipeline and be coated with in the mould of thermal-arrest plate of selective absorbing film of black chromium, the thickness of black chromium selective absorbing film is 15 μ m; Make out the wet gel formed body with composite construction, compound wet gel formed body after under the room temperature aging 1 day, is adopted embodiment 1 described supercritical drying drying process, wherein baking temperature is 300 ℃, and can make the coefficient of heat conduction is 0.82W/m
2The sun set hot plate integral structure unit of K.Be that the pipe joint of memorial alloy processing combines with the two-port of the pipeline of each unit by CuAlNi then, promptly become the solar heat-collection plate.The selective absorbing film combination of black chromium very firm do not have broken phenomenon.Compare with existing flat plate collector product, the outlet heat medium temperature has improved 51%.
With ethyl orthosilicate, absolute ethyl alcohol, deionized water, hydrochloric acid, ammoniacal liquor 1: 7: 3 in molar ratio: 0.001: 0.002, be made into Ludox with two-step method, be cast in then to set in advance and be combined with pipeline and be coated with in the mould of thermal-arrest plate of selective absorbing film of black chromium, the thickness of black chromium selective absorbing film is 30 μ m; Make out the wet gel formed body with composite construction, compound wet gel formed body after under the room temperature aging 1 day, is adopted embodiment 1 described supercritical drying drying process, wherein baking temperature is 260 ℃, and can make the coefficient of heat conduction is 0.73W/m
2The sun set hot plate integral structure unit of K.Be that the pipe joint of memorial alloy processing combines with the two-port of the pipeline of each unit by TiNi then, promptly become the solar heat-collection plate.The selective absorbing film combination of black chromium very firm do not have broken phenomenon.Compare with existing flat plate collector product, the outlet heat medium temperature has improved 65%.
Claims (7)
1. composite flat plate type solar heat collecting plate, it is characterized in that: be spliced with the integral structure unit that metallic conduit and transparent heat-insulating material were compounded to form by thermal-arrest plate, black chromium selective absorbing film, thermal medium, described thermal medium is incorporated into the one side of thermal-arrest plate with metallic conduit, is coated with black chromium selective absorbing film at the another side of thermal-arrest plate; Transparent heat-insulating material will be combined with in thermal medium is included in metallic conduit and the thermal-arrest plate that is coated with black chromium selective absorbing film, form the integral structure unit, described thermal medium is connected with the pipe joint that an energy is connected with other integral structure unit respectively with the two ends of metallic conduit, and the material of described pipe joint is copper base or Ti-Ni marmem.
2. a kind of composite flat plate type solar heat collecting plate according to claim 1 is characterized in that: the thickness range of described black chromium selective absorbing film is 10～50 μ m.
3. a kind of composite flat plate type solar heat collecting plate according to claim 1 and 2 is characterized in that: the thickness range of described black chromium selective absorbing film is 20～30 μ m.
4. a kind of composite flat plate type solar heat collecting plate according to claim 1 is characterized in that: described marmem is CuZnAl system, CuAlNi system or TiNi system.
5. according to claim 1 or 4 described a kind of composite flat plate type solar heat collecting plates, it is characterized in that: described marmem is CuZnAl system or CuAlNi system.
6. a kind of composite flat plate type solar heat collecting plate according to claim 1 is characterized in that: transparent heat-insulating material is SiO
2Aeroge.
7. a kind of composite flat plate type solar heat collecting plate according to claim 1 is characterized in that: described integral structure unit is that the length of side is 800-1200mm * 150-250mm, and thickness is the cuboid of 15-25mm.
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| CN2010201194590U CN201621887U (en) | 2010-02-26 | 2010-02-26 | Composite-type flat-plate solar-energy heat collecting plate |
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| CN201621887U true CN201621887U (en) | 2010-11-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793438A (en) * | 2010-02-26 | 2010-08-04 | 东莞市创一新材料科技有限公司 | Composite flat plate type solar heat collecting plate and preparation method thereof |
-
2010
- 2010-02-26 CN CN2010201194590U patent/CN201621887U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793438A (en) * | 2010-02-26 | 2010-08-04 | 东莞市创一新材料科技有限公司 | Composite flat plate type solar heat collecting plate and preparation method thereof |
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| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20101103 |