CN103973216A - Photovoltaic, photo-thermal and lighting energy comprehensive utilization device - Google Patents
Photovoltaic, photo-thermal and lighting energy comprehensive utilization device Download PDFInfo
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- CN103973216A CN103973216A CN201410177759.7A CN201410177759A CN103973216A CN 103973216 A CN103973216 A CN 103973216A CN 201410177759 A CN201410177759 A CN 201410177759A CN 103973216 A CN103973216 A CN 103973216A
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- optically focused
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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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- 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
- Y02E10/52—PV systems with concentrators
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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
- Y02E10/60—Thermal-PV hybrids
Abstract
The invention relates to a photovoltaic, photo-thermal and lighting energy utilization device. The device comprises a transparent light concentration prism cover plate, anti-reflective films, photovoltaic cells, side plates, a bottom plate, a ventilation pipe and a fan. The surface of one side of the transparent light concentration prism cover plate is a plane, and solid light concentration prisms in parallel are evenly distributed on the surface of the other side of the transparent light concentration prism cover plate. The two side faces of each solid light concentration prism are symmetrical parabolic faces. The photovoltaic cells are pasted at the bottoms of the solid light concentration prisms. The anti-reflective films are located between the solar photovoltaic cells and the lower bottom surfaces of the solid light concentration prisms. The bottom plate and the side plates are transparent, and small holes are evenly machined in the bottom plate. The side face of the transparent light concentration prism cover plate and the side plates are connected to form a closed-loop enclosed space. One face, provided with the solid light concentration prisms, of the transparent light concentration cover plate is located in the enclosed space. The enclosed space is sealed by the bottom plate, the side plates are connected to the ventilation pipe to be communicated with the enclosed space, and the exhaust fan is connected to the ventilation pipe. The photovoltaic, photo-thermal and lighting energy utilization device is simple in overall structure, achieves a concentrating photovoltaic, photo-thermal and lighting combination and increases the comprehensive utilization rate of energy.
Description
Technical field
The present invention relates to one and there is photovoltaic generation, photo-thermal and daylighting total energy approach device, belong to optical technology application, Green Architecture and solar energy composite and utilize field, particularly solar energy green building and solar energy, heat, CCHP technical field, also can be applicable to the field such as agriculture project and arviculture.
Background technology
In modern building design, more and more focus on adopting novel lighting and power-saving technology, the most conventional energy saving building roof slab of application is at present the transparent materials such as glass.The use of a large amount of transparent materials can not only increase euphorosia and the design art of building, and makes building interior have good illumination daytime.But conventional transparent cover plate also can be with and serve negative issue, such as, when sunlight is strong at noon on conventional clear glass roof, light sees through roof and is shining into indoor, make indoor illumination excessively strong, make people produce dazzling sensation, and the light of a large amount of transmissions can cause indoor temperature to raise, make human body discomfort.In actual use, the light intensity demand in building is substantially invariable, and the light intensity of the sun is along with the variation of different time sections in season and a day changes.Typically, time period at the high noon light intensity in summer and a day be eager to excel, and upper and lower time period at the noon light intensity in winter and a day relatively a little less than, cause architecture indoor illuminance inhomogeneous.
In order to adapt to the light intensity demand in building, need to adopt certain measure control light and control heat, realize in one day as far as possible illuminance in building evenly.Solution mainly contains following a few class at present: a class is in the time of design building wall windowpane, by windowpane indent or above windowpane or both sides add the fixed blind thing of extension, windowpane masking structure around can block certain sunlight, make light not enter completely in building, reach reduction indoor light excessively strong, the problem of excess Temperature.This method has certain defect, and can meet original intention the high noon in summer or one day, but the upper and lower noon in winter or one day and cloudy day time, illumination originally a little less than, this design can make indoor light deficiency, also can make indoor sombrely.
An other class solution is the movable veil that increases similar shutter outside glass window at building wall, the design form of veil is various, can be above windowpane or side increase rotatable shadow shield, or increase window leaf or level or vertical venetian blind type veil outside glass window, or increase roll-up roller shutter.Although this method can, under the weak weather condition of light, because veil can be movable, be rotated or remove veil with respect to preceding method, makes it no longer be in the light, and meets indoor lighting requirement.But this kind of method also has shortcoming, first these veils order building appearances that are added to building wall periphery are irregular, not attractive in appearance, and easily make the veil increase potential safety hazard that comes off at strong wind weather.These outstanding veils are easy to dust stratification in addition, affect the reflection of light, have also increased clean difficulty and difficulty of construction.
Also having class methods is to post double-deck complementary stepped transparent prism wedge film at the inner surface of windowpane, and the light that enters the different incidence angles scope in windowpane is reflected and reflected.Winter, angle of incidence of light was little, can enter in window through reflection and the refraction of film, met indoor lighting requirement; Summer, angle of incidence of light was large, after the reflection of film and refraction, penetrated downwards along the perpendicular wall of windowpane, did not enter in window.Accompany thin layer air in the middle of duplicature, the advantage of duplicature is in realizing control light, and people still can see scenery outside window clearly indoor.The shortcoming of these class methods is: involve great expense, cost is high.
The light-operated hot measure of above-described control is all the research of carrying out for the window of building wall, because construction window is not only wanted printing opacity, diathermanous, and need to ventilate, people needs to observe outdoor situation by window under construction, and these requirements are subject to many limitations the light-operated thermal means of control that utilizes window to carry out.The function of building roof is relatively single, does not have the variety of issue such as window.
Summary of the invention
In view of this, the invention provides a kind of photovoltaic, photo-thermal and daylighting total energy approach device, utilize it to carry out daylighting control, make light penetration morning and evening and the winter of device high, noon and summer are low, and in conjunction with photoelectricity and photothermal technique, can solve preferably the problem of illuminance and non-uniform temperature in interior one day of building.
A kind of photovoltaic, photo-thermal and daylighting total energy approach device, device comprises transparent optically focused rib cover plate, anti-reflection film, photovoltaic cell, side plate, base plate, ventilation duct and blower fan, wherein, one side surface of transparent optically focused rib cover plate is plane, entity optically focused rib for being parallel to each other uniform on opposite side surface, the two sides of entity optically focused rib are symmetrical parabola, and photovoltaic cell is posted in entity optically focused rib bottom, and anti-reflection film is between solar-energy photo-voltaic cell and entity optically focused rib bottom surface; Base plate and side plate are all transparent, are processed with uniform aperture on base plate;
Its integrated connection closes, the side of transparent optically focused rib cover plate and side plate are connected to form the space of surrounding of a closed loop, on transparent optically focused rib cover plate, be positioned at this with the one side of entity optically focused rib and surround space, this surrounds space and is sealed by base plate, on side plate, connect ventilation duct and communicate with surrounding space, on ventilation duct, be connected to air exhauster.
Described transparent optically focused rib cover plate by transparent material as organic bulk glass machine-shaping; On it, each optically focused rib is also referred to as also referred to as CPC (Compound Parabolic Concentrator is compound parabolic concentrator).
Operation principle: photovoltaic of the present invention, photo-thermal and daylighting total energy approach device are arranged on building roof or part daylighting window place, irradiated device by sunlight daytime, when sunlight direct projection or incidence angle hour, because sunlight is to penetrate stereotropic transparent optically focused rib cover plate by air, belong to optically thinner medium directive optically denser medium, therefore unirefringence occur at transparent optically focused rib cover plate interface; Light is mapped to the interface of entity optically focused rib wall and air afterwards, owing to meeting total reflection condition, thereby at entity optically focused rib wall, a total reflection occurs, then light directive entity optically focused rib bottom.Light finally, after transparent cover plate refraction and reflection, converges at entity optically focused rib bottom, finally by after crossing anti-reflection film so that the photovoltaic cell that is affixed on entity optically focused rib bottom receive and produce electric energy heating.
In the time that angle of incidence of sunlight is larger, because sunlight is by air directive entity transparent cover plate, belong to optically thinner medium directive optically denser medium, therefore there is unirefringence at transparent cover plate interface, light is mapped to the interface of entity optically focused rib wall and air afterwards, owing to meeting total reflection condition, thereby there is a total reflection at entity optically focused rib wall; Then the interface of light directive entity optically focused rib opposite side wall and air, at this interface, light is by optically denser medium directive optically thinner medium, occur to be penetrated by the wall of entity optically focused rib the latter half after unirefringence, light enters in building and realizes daylighting through dianegative, and this part luminous energy has also heated the air surrounding in space simultaneously; After blower fan is opened, the air being sucked in building by aperture on base plate is extracted out by blower fan after photovoltaic cell heating, can carry out heat utilization to it, and mobile air simultaneously also cooling photovoltaic cell, increased life-span and the efficiency of photovoltaic cell.
For realizing the object of easy processing, described entity optically focused rib adopts trapezoidal shape, and its cross section is inverted trapezoidal;
Save material for realizing, alleviate the object of the weight of parts, entity optically focused rib adopts hollow structure, and its surfaces externally and internally is parabola; In addition, on transparent optically focused rib cover plate, add a cover layer of transparent cover plate, can prevent that its inside from reducing because dust stratification causes light transmittance, and be beneficial to clean.
Beneficial effect:
(1) the present invention is in the time that sunlight is strong, be angle of incidence of light hour, the photovoltaic cell of entity optically focused rib bottom receives the raw electricity heating of the light being converged by entity optically focused rib, when obtaining electric energy, can obtain heat energy, and avoid the problem that building interior is overheated and light is dazzling, attractive in appearance with seasonal modern building design, increase design art, the comprehensive utilization that has realized the energy has realized the object of green building; In the time of sunlight oblique incidence, angle of incidence of light is larger, there is unirefringence at air and polymethyl methacrylate interface in light, and then occur after total reflection on the entity optically focused rib wall of making at polymethyl methacrylate, again be mapped on the interface of polymethyl methacrylate and air and reflect, last light is penetrated by dianegative again, enters and in building, realizes daylighting, be simple, the reliable combination that also can realize condensation photovoltaic, photo-thermal and daylighting of overall structure, improved total energy approach rate.
(2) entity optically focused rib of the present invention adopts prismatoid unit to replace, and prismatoid unit outer surface is trapezium structure, is designed to trapezium structure, i.e. convenient processing, rate of finished products are high.
(3) entity optically focused rib of the present invention adopts hollow structure, can save material, and alleviate the weight of whole clearing cover plate, adopt transparent flat deck that optically focused rib openend is sealed, can prevent that hollow structure inside from reducing because dust stratification causes light transmittance, be beneficial to clean, thereby extend useful life of transparent cover plate.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the light path principle figure of entity optically focused rib in the transparent optically focused rib of the present invention cover plate.
Fig. 3 is transparent cover plate three-dimensional structure diagram of the present invention.
Fig. 4 is that the transparent optically focused rib cover plate that the present invention makes entity optically focused rib into trapezoidal shape is implemented illustration.
Fig. 5 is that the transparent optically focused rib cover plate that the present invention makes entity optically focused rib into hollow structure is implemented illustration.
Wherein, 1-anti-reflection film; 2-entity optically focused rib; 3-transparent optically focused rib cover plate; 4-oblique incident ray; 5-normal incident light; 6-photovoltaic cell; 7-ventilation duct; 8-air stream; 9-base plate; 10-side plate; 11-light beam I; 12-light beam II; Half maximum acceptance angle of 13-entity optically focused rib; The critical angle of 14-generation total reflection; 15-plane of incidence normal; 16-trapezoidal optically focused rib; 17-transparent trapezoidal optically focused rib cover plate; The inside and outside parabolic concentrator rib of 18-hollow; 19-transparent cover plate; 20-clear hollow parabolic concentrator rib cover plate.
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
As shown in accompanying drawing 1 and 3, photovoltaic of the present invention, photo-thermal and daylighting total energy approach device comprise transparent optically focused rib cover plate 3, anti-reflection film 1, photovoltaic cell 6, side plate 10, base plate 9, ventilation duct 7 and blower fan, wherein, one side surface of transparent optically focused rib cover plate 3 is plane, entity optically focused rib 2 for being parallel to each other uniform on opposite side surface, the two sides of entity optically focused rib 2 are symmetrical parabola, photovoltaic cell 6 is posted in entity optically focused rib 2 bottoms, and anti-reflection film 1 is between photovoltaic cell 6 and entity optically focused rib 2 bottom surfaces; On base plate 9, be processed with uniform aperture;
Its integrated connection closes, the side of transparent optically focused rib cover plate 3 and side plate 10 are connected to form the space of surrounding of a closed loop, on transparent optically focused rib cover plate 3, be positioned at this with the one side of entity optically focused rib 2 and surround space, this surrounds space and is sealed by base plate 9, on side plate 10, connect ventilation duct 7 and communicate with surrounding space, on ventilation duct 7, be connected to air exhauster.
Operation principle is, sunlight is injected by entity oolemma optically focused rib cover plate 3 upper surfaces, through refraction and the reflection of transparent entity optically focused rib 2, when incidence angle hour or when being direct light 5, light is converged on photovoltaic cell 6 after anti-reflection film 1, has reduced the transmitance of transparent optically focused rib cover plate 3 and has produced electric energy and heat; In the time that incidence angle increases, oblique incidence light 4, through refraction and the reflection of transparent entity optically focused rib 2, finally penetrates transparent optically focused rib cover plate 3, lower wall surface by transparent entity optically focused rib 2 penetrates, transmitance increases, and then enters in building and realizes daylighting through base plate 9, can be used for illumination.Open after blower fan, the air stream 8 being sucked by base plate aperture is extracted out by blower fan by ventilation duct 7 after photovoltaic cell 6 heats, and can carry out heat utilization, and air stream 8 simultaneously also cooling photovoltaic cell 6, increased life-span and the efficiency of photovoltaic cell 6.
As shown in Figure 2, the light path principle of single entity optically focused rib 2 is as follows:
Light beam 11 is effectively to converge light, the angle that itself and plane of incidence normal 15 form is incidence angle α, effectively converge light and refer to that incident light 11 is after the upper surface refraction of entity optically focused rib 2, its refraction angle just equates with half maximum acceptance angle 13 of optically focused rib, is just mapped to the junction of entity optically focused rib 2 bottoms and curved wall after the offside reflection of optically focused rib.Now, light beam 11 still can be received by the photovoltaic cell 6 of transparent single entity optically focused rib 2 bottoms just, therefore, penetrate the incident light that is less than α in A point and incidence angle and all can converge on photovoltaic cell 6, penetrate the incident light that is greater than α in A point and incidence angle and can after the refraction of transparent single entity optically focused rib 2 and reflection, be penetrated by transparent single entity optically focused rib 2 bottoms.
Sunlight direct projection or incidence angle hour, the propagation path of light beam 11 in entity optically focused rib 2 can be explained as follows step by step: because light beam I is by the transparent optically focused rib of air directive cover plate 3, belong to optically thinner medium directive optically denser medium, therefore at transparent optically focused rib cover plate 3 interfaces, unirefringence occurs.Light beam I 11 is mapped to the interface of entity optically focused rib 2 walls and air afterwards, because incidence angle is greater than the critical angle 14 that total reflection occurs, meet total reflection condition, thereby after a total reflection occurs entity optically focused rib 2 walls, light beam I directive entity optically focused rib 2 bottoms.Light beam I finally, after transparent optically focused rib cover plate 3 reflects and reflects, converges at entity optically focused rib 2 bottoms.Because light beam I is understood some generation total reflection in entity optically focused rib 2 bottoms, be unfavorable for that photovoltaic cell 6 receives, therefore between photovoltaic cell 6 and entity optically focused rib 2, put anti-reflection film 1, anti-reflection film 1 density is between air and cover plate 3 density, can avoid so a part of light, in entity optically focused rib 2 bottoms, total reflection occurs, increase by 6 amount of light that can receive of photovoltaic cell, thereby improve the generating efficiency of photovoltaic cell 6.The photovoltaic cell 6 that final light is affixed on entity optically focused rib 2 bottoms receives generation electric energy heating.
When sunlight oblique incidence, incidence angle is large, light beam 12 is effective lighting light, its incidence point is all A point, and with the angle that plane of incidence normal 15 forms be β, the propagation path of light beam II in entity optically focused rib 2 can be explained as follows step by step: because light beam II is by the transparent entity cover plate 3 of air directive, belong to optically thinner medium directive optically denser medium, therefore at transparent cover plate 3 interfaces, unirefringence occurs.Light beam II is mapped to the interface of entity optically focused rib 2 walls and air afterwards, because incidence angle is greater than the critical angle 14 that total reflection occurs, meets total reflection condition, thereby at entity optically focused rib 2 walls, a total reflection occurs.Due to incidence angle, β is greater than α, light beam II is the interface of directive entity optically focused rib 2 opposite side walls and air then, at this interface, incident beam II is less than the critical angle 14 that total reflection occurs, do not meet total reflection condition, it is occurred finally to be penetrated by entity optically focused rib 2 bottoms after unirefringence by optically denser medium directive optically thinner medium, thereby enters in building and realize daylighting through base plate 9.
As shown in Figure 4, this embodiment makes entity parabolic concentrator rib into trapezoidal optically focused rib; The operation logic of device is as follows: the sun light beam 5 of vertical incidence converges at the photovoltaic cell 6 of trapezoidal optically focused rib 16 bottoms after the reflection of the trapezoidal optically focused rib 16 of transparent trapezoidal optically focused rib cover plate 17 again through anti-reflection film 1, raw electricity heating.The sun light beam 4 of oblique incidence penetrates in its underpart after the refraction of trapezoidal optically focused rib 16 and reflection, sees through base plate 9 and enters building interior, is used for daylighting.On side plate 10, have ventilation hole, on external ventilation duct 7, a blower fan can be installed, open blower fan, air stream 8 is in base plate 9 aperture accesss to plant, cooling photovoltaic cell 6 when heating by photovoltaic cell 6, can increase efficiency and the life-span of photovoltaic cell 6, discharge afterwards in addition heat utilization from ventilation duct 7 air outlets.
As shown in Figure 5, this embodiment makes entity parabolic concentrator rib at the inside and outside parabolic concentrator rib of hollow structure; The operation logic of device is as follows: the sun light beam of vertical incidence 5 sees through after transparent cover plate 19 photovoltaic cell 6 that converges at again its bottom after the refraction of the transparent hollow type parabolic concentrator rib 18 of clear hollow parabolic concentrator rib cover plate 20 and reflection through anti-reflection film 1, raw electricity heating.After the sun light beam 4 of oblique incidence is mapped to transparent cover plate 19 and reflects, be mapped on the curved wall of the inside and outside parabolic concentrator rib 18 of hollow, more finally penetrate in its underpart after refraction, see through base plate 9 and enter building interior, be used for daylighting.On side plate 10, have ventilation hole, on external ventilation duct 7, a blower fan can be installed, open blower fan, air stream 8 is in base plate 9 aperture accesss to plant, cooling photovoltaic cell 6 when heating by photovoltaic cell 6, can increase efficiency and the life-span of photovoltaic cell 6, discharge afterwards in addition heat utilization from ventilation duct 7 air outlets.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. photovoltaic, photo-thermal and daylighting total energy approach device, it is characterized in that, device comprises transparent optically focused rib cover plate (3), anti-reflection film (1), photovoltaic cell (6), side plate (10), base plate (9), ventilation duct (7) and blower fan, wherein, one side surface of transparent optically focused rib cover plate (3) is plane, entity optically focused rib (2) for being parallel to each other uniform on opposite side surface, the two sides of entity optically focused rib (2) are symmetrical parabola, photovoltaic cell (6) is posted in entity optically focused rib 2 bottoms, anti-reflection film (1) is positioned between photovoltaic cell (6) and entity optically focused rib (2) bottom surface, base plate (9) and side plate (10) are all transparent, and base plate is processed with uniform aperture on (9),
Its integrated connection closes, the side of transparent optically focused rib cover plate (3) and side plate (10) are connected to form the space of surrounding of a closed loop, the one side of transparent optically focused rib cover plate (3) upper band entity optically focused rib (2) is positioned at this and surrounds space, this surrounds space and is sealed by base plate (9), the upper ventilation duct (7) that connects of side plate (10) communicates with surrounding space, and ventilation duct is connected to air exhauster on (7).
2. photovoltaic as claimed in claim 1, photo-thermal and daylighting total energy approach device, is characterized in that, described entity optically focused rib (2) adopts trapezoidal shape, and its cross section is inverted trapezoidal.
3. photovoltaic as claimed in claim 1, photo-thermal and daylighting total energy approach device, is characterized in that, described entity parabolic concentrator rib (2) adopts hollow structure, and its surfaces externally and internally is parabola.
4. photovoltaic as claimed in claim 3, photo-thermal and daylighting total energy approach device, is characterized in that, adds a cover layer of transparent cover plate (19) on transparent optically focused rib cover plate (3).
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| CN201410177759.7A CN103973216A (en) | 2014-04-29 | 2014-04-29 | Photovoltaic, photo-thermal and lighting energy comprehensive utilization device |
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| CN201410177759.7A CN103973216A (en) | 2014-04-29 | 2014-04-29 | Photovoltaic, photo-thermal and lighting energy comprehensive utilization device |
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| CN104767475A (en) * | 2015-04-27 | 2015-07-08 | 乔风成 | Solar generator |
| CN104949353A (en) * | 2015-06-20 | 2015-09-30 | 赵石林 | Non-tracking solar compound paraboloid condenser |
| CN105577105A (en) * | 2015-12-17 | 2016-05-11 | 广东五星太阳能股份有限公司 | Asymmetric concentrating photovoltaic photo-thermal system capable of realizing fixed installation |
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| CN108966952A (en) * | 2018-08-27 | 2018-12-11 | 中国农业科学院农业环境与可持续发展研究所 | A kind of solar spectral watt and greenhouse |
| CN109827344A (en) * | 2019-02-25 | 2019-05-31 | 北方工业大学 | Gas expansion driving liquid light-gathering type light-dimming heat collection system and method |
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| CN111081801A (en) * | 2019-11-28 | 2020-04-28 | 湖北工业大学 | Lighting and power generation integrated glass with adjustable radiation transmittance |
| CN112865702A (en) * | 2021-01-14 | 2021-05-28 | 北京理工大学 | Shutter type solar concentrating photovoltaic/photo-thermal/illumination integrated system |
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| CN109827344A (en) * | 2019-02-25 | 2019-05-31 | 北方工业大学 | Gas expansion driving liquid light-gathering type light-dimming heat collection system and method |
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Application publication date: 20140806 |