WO2012176590A1 - Système d'utilisation d'énergie solaire - Google Patents

Système d'utilisation d'énergie solaire Download PDF

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Publication number
WO2012176590A1
WO2012176590A1 PCT/JP2012/063804 JP2012063804W WO2012176590A1 WO 2012176590 A1 WO2012176590 A1 WO 2012176590A1 JP 2012063804 W JP2012063804 W JP 2012063804W WO 2012176590 A1 WO2012176590 A1 WO 2012176590A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
energy utilization
utilization system
solar energy
heat
Prior art date
Application number
PCT/JP2012/063804
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English (en)
Japanese (ja)
Inventor
広志 正木
菊池　宏成
Original Assignee
株式会社日立プラントテクノロジー
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Filing date
Publication date
Application filed by 株式会社日立プラントテクノロジー filed Critical 株式会社日立プラントテクノロジー
Publication of WO2012176590A1 publication Critical patent/WO2012176590A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • 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

Definitions

  • the present invention relates to a solar energy utilization system, and more particularly to a system for recovering and effectively utilizing solar energy as electric energy and thermal energy.
  • Patent Document 1 An example of a conventional solar energy utilization system is described in Patent Document 1.
  • the holder that holds the solar cell module is a refrigerant.
  • it has the some inflow port and several outflow port which are connected to each refrigerant
  • Patent Document 2 Another example of a conventional solar energy utilization system is described in Patent Document 2.
  • a wick is provided in the vicinity of the surface plate that fixes the solar cell, and the heat pipe working chamber and the secondary cooling chamber are divided by the wave heat transfer plate. .
  • a working medium such as water is sealed in the heat pipe working chamber, and the saturation pressure in the working chamber is set to a saturation pressure near the temperature at which the operation efficiency of the solar cell is highest. Water is circulated in the secondary cooling chamber, heat from the heat pipe is received through the heat transfer plate, discharged as hot water, and used outside.
  • the thermal conductivity of the holder which is a heat absorbing member
  • heat generated in the solar cell is dissipated from the surface of the holder opposite to the surface in contact with the solar cell without being transferred from the holder to the refrigerant in the refrigerant flow path. Therefore, the loss in heat energy recovery increases.
  • the thermal conductivity of the holder which is a member for absorbing heat generated in the solar cell
  • the thermal conductivity of the holder which is a member for absorbing heat generated in the solar cell
  • the present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to effectively cool the solar cell and effectively generate heat generated by the solar cell in the solar energy utilization system having the solar cell. It is to make it available. Thereby, it aims at making the improvement of the reliability of a solar energy utilization system and the improvement of efficiency compatible.
  • a feature of the present invention that achieves the above object is that a solar energy utilization system including a solar cell is provided with a heat collecting device that collects heat generated by the solar cell on a surface opposite to the light receiving surface of the solar cell,
  • the heat collecting device has a laminated structure in which a heat collecting plate, a sealing means, and a support plate are laminated, and the heat conductivity of the heat collecting plate is higher than the heat conductivity of the sealing means and the support plate. It is in.
  • the shape of the sealing means may be an integral shape obtained by adding a plurality of linear straightening members extending into the frame to the frame. Further, a plurality of grooves or protrusions extending in the longitudinal direction may be formed on the surface of the heat collecting plate opposite to the contact surface with the solar cell, and the support plate is opposite to the surface in contact with the sealing means.
  • a frame-like spacer and a flat plate-like second support plate may be laminated on the surface, and an air heat insulation space may be formed inside the spacer. Furthermore, it is desirable to insulate the surface of the heat collecting plate in contact with the solar cell.
  • the cooling means for cooling the solar cell has high thermal conductivity on the solar cell contact side and low thermal conductivity on the side opposite to the solar cell contact surface.
  • the solar cell can be effectively cooled and the heat generated in the solar cell can be effectively utilized.
  • the improvement of the reliability of a solar energy utilization system and the improvement of efficiency are compatible.
  • FIG. 1 is a system diagram of one embodiment of a solar energy utilization system according to the present invention. It is a figure explaining the relationship between solar cell temperature and electric power generation amount. It is a longitudinal cross-sectional view of the heat collecting device which the solar energy utilization system shown in FIG. 1 has. It is a disassembled perspective view of the heat collecting apparatus shown in FIG. It is a partial expanded sectional view of a heat collecting device, and is a figure showing other examples of a heat collecting plate. It is a top view of the sealing material which the heat collecting apparatus shown in FIG. 3 has. It is a top view of the modification of a sealing means. It is a disassembled perspective view of the other Example of a heat collecting device.
  • FIG. 1 is a system diagram of an embodiment of a solar energy utilization system 100.
  • Solar cells 10 used for photovoltaic power generation are provided on the roof of the building, the roof of the house, the sunshine surface, and the like.
  • the sunlight 18 incident on the solar cell 10 is converted into electric energy by the solar cell 10 to generate electric power and used as a power source.
  • part of the sunlight 18 incident on the solar cell 10 becomes heat energy and generates heat, thereby raising the temperature of the solar cell 10.
  • the power generation amount P (kW) of the solar cell 10 decreases as the temperature T (° C.) of the solar cell 10 increases. Therefore, in order to secure the power generation amount of the solar cell 10, it is necessary to set the temperature of the solar cell 10 to a predetermined temperature or lower. Therefore, in the present invention, in order to prevent the temperature of the solar cell 10 from rising due to the sunlight 18, the heat collecting device 12 having the same size as the light receiving surface of the solar cell 10 is attached to the back side of the solar cell 10. .
  • the heat collector 12 is a cooling device that cools with water or a refrigerant, and is connected to the heat source facility 22 via a coolant supply pipe 16 and a coolant return pipe 14.
  • a pump is provided in the middle of the coolant supply pipe 16 to supply the coolant to the heat collector 12.
  • the heat source equipment 22 is most simply a liquid-liquid type heat exchanger. Or refrigeration equipment, such as an absorption refrigerator, may be sufficient.
  • a hot water tank 24 is connected to the heat source facility 22 by piping.
  • the coolant or refrigerant collected or absorbed by the heat collector 12 is led to the heat source facility 22 from the coolant return pipe 14, and heat is exchanged with the cold water led from the cooling water pipe 28 for heating / hot water supply.
  • the water that has been heated and heated by heat exchange at the heat source facility 22 is stored in the hot water tank 24 and then sent from the heating / hot water supply hot water pipe 26 to the demand source.
  • the coolant or the refrigerant whose temperature has been reduced by heat exchange with the cold water led from the cold water pipe 28 for heating and hot water supply in the heat source facility 22 is sent again from the coolant supply pipe 16 to the heat collector 12 by the pump 20. Thereafter, it circulates between the heat collecting device 12 and the heat source device 22.
  • FIG. 3 one Example of a heat collecting device is shown with a longitudinal cross-sectional view.
  • the heat collector 12 is attached to the back surface of the solar cell 10 in close contact with the solar cell 10.
  • the heat collector 12 is a rectangular flat plate heat collecting plate 30 that is in close contact with the solar cell 10 and collects heat generated by the solar cell 10, and a rectangular flat plate that is disposed at a predetermined interval from the heat collecting plate 30.
  • a frame-shaped sealing means 32 disposed between the heat collecting plate 30 and the support plate 40 in order to maintain a predetermined distance between the heat collecting plate 30 and the support plate 40.
  • the heat collecting plate 30 is made of aluminum, copper, or an alloy thereof having high thermal conductivity, and is brought into close contact with the back side of the solar cell 10 to prevent a decrease in thermal conductivity. However, it is desirable to insulate the surface on the side in close contact with the solar cell 10 so as to be electrically insulated from the solar cell.
  • the support plate 40 prevents the heat transmitted to the heat collecting plate 30 from being dissipated to the outside, and the space formed inside the frame of the frame-shaped sealing means 32 together with the heat collecting plate 30 as a coolant. Or it forms as the coolant flow path 46 of a refrigerant
  • coolant is made of aluminum, copper, or an alloy thereof having high thermal conductivity, and is brought into close contact with the back side of the solar cell 10 to prevent a decrease in thermal conductivity. However, it is desirable to insulate the surface on the side in close contact with the solar cell 10 so as to be electrically insulated from the solar cell.
  • the support plate 40 prevents the heat transmitted to the heat collecting plate 30 from
  • the material of the support plate 40 is preferably one that does not interfere with the flow of the coolant or refrigerant and has low thermal conductivity, and stainless steel or plastic material is used.
  • stainless steel or plastic material is used.
  • PC polycarbonate
  • the support plate 40 includes a supply hole 42 that is a through hole for introducing the coolant or the refrigerant into the coolant flow path 46, and a discharge hole 44 that is a through hole for discharging the coolant or the coolant from the coolant flow path 46. Is formed.
  • a coolant supply pipe 47 and a coolant discharge pipe 48 are connected to the holes 42 and 44, respectively.
  • the seal means 32 is required to prevent the coolant or refrigerant introduced to the coolant flow path 46 from leaking to the outside.
  • the sealing means 32 is a member that ensures the height of the coolant flow path 46. Further, since the outer peripheral portion is in contact with the outside air, it is necessary to avoid heat dissipation.
  • the seal means 32 is made of rubber or the like having good adhesion to the metal heat collecting plate 30 and the plastic support plate 40. If rubber or the like is used, the shape of the sealing means 32 can be easily obtained by mold molding in which raw materials are poured into a mold or the like.
  • FIG. 4 is an exploded perspective view of the heat collecting device 12.
  • the heat collecting plate 30, the sealing means 32, and the support plate 40 are stacked, and then bolts are inserted into bolt holes provided in the peripheral portion of each member and fastened with nuts.
  • a device 12 is formed. It should be noted that the sealing performance is reinforced between each member, that is, between the heat collecting plate 30 and the sealing means 32 and between the sealing means 32 and the support plate 40 by using any sealing material such as a liquid sealing material, gasket, or O-ring. ing.
  • a material having high thermal conductivity is used for the heat collecting plate and a material having low thermal conductivity is used for the supporting plate, so that heat collected by the heat collecting plate is prevented from being directly transmitted to the supporting plate.
  • the heat collected by the heat collecting device can be effectively used for hot water and the like, thereby saving energy.
  • FIG. 5 shows another embodiment of the heat collecting device provided in the solar energy utilization system 100 according to the present invention.
  • the present embodiment is different from the above embodiment in that the heat collecting plate 30 is not a flat plate, but a large number of protrusions 31a and grooves 31b are formed on the surface on the side of the coolant channel 46 through which the coolant 45 flows. .
  • the cross-sectional shapes of the protrusion 31a and the groove 31b are rectangular in consideration of ease of processing. Since the protrusion 31a and the groove 31b are formed, the area where the coolant 45 contacts the heat collecting plate 30 is increased, and heat transfer from the heat collecting plate 30 to the coolant 45 is promoted.
  • the cross-sectional shape of the groove 31b of the heat collecting plate 30 is rectangular, but it is not necessarily rectangular, and the contact area increases, such as a semicircular cross-section, a triangle, or a combination of a rectangle and an arc. I just need it. However, it is preferable that the surface of the heat collecting plate 30 on the side of the coolant channel 46 is wider than the inner part because the flow of the coolant 45 is not hindered.
  • FIG. 6 shows some modified examples of the sealing means according to the present invention.
  • FIG. 6A shows the sealing means 32 serving as a reference.
  • the coolant or refrigerant supplied from the coolant / refrigerant supply hole 42 formed in the support plate 40 similarly flows toward the coolant / refrigerant discharge hole 44 formed in the support plate 40 (flow 35). Therefore, the cooling liquid or refrigerant supply hole 42 and the discharge hole 44 are provided in the vicinity of the longitudinal end of the cooling liquid flow path 46 so that the cooling liquid or refrigerant can exchange heat with the heat collecting plate 30 for a long time. It is provided at position 40.
  • the cooling that extends in the longitudinal direction of the sealing means 32a and 32b is performed in order to increase the distance through which the coolant or refrigerant flows in the coolant flow path.
  • a plurality of flow path dividing members 33b are formed in a nested manner in the liquid flow path dividing member 33a or in a direction perpendicular to the longitudinal direction.
  • the flow path dividing member 33a is a central portion on the short side of the seal member, and the coolant or refrigerant supply hole 42a side is integrated with the frame portion of the seal member 32a. The opposite end portion is formed at a distance from the frame portion of the seal member 32a.
  • the coolant supply hole 42a is on one side of the flow path divided by the flow path dividing member 33a, in the vicinity of the frame portion of the seal member 32a, and the discharge hole 44a has a longitudinal position substantially the same as the supply hole 42a. And it is formed on the other channel side divided by the channel dividing member 33a.
  • a U-shaped coolant flow 35a from the supply hole 42a toward the discharge hole 44a is formed, the distance that the coolant comes into contact with the heat collecting plate 30 is increased, and heat exchange is promoted.
  • a plurality of flow path dividing members 33b are integrally formed from one long side of the frame portion of the sealing means 32b toward the central portion, and the plurality of flow path dividing members 33b are formed in the frame of the sealing means 32b. It is integrally formed from the other long side to the central part.
  • the position in the longitudinal direction of the flow path dividing member 33b is set to be the middle, preferably the center, between one long side and the other long side of the sealing means 32b.
  • the length in the short side direction of the flow path dividing member 33b is set to be not less than half the length of the short side.
  • the coolant supply hole 42b and the discharge hole 44b are formed in the vicinity of the short side of the sealing means 32b and on the other short side.
  • the coolant or refrigerant supplied from the supply hole 42b forms meandering flows 35b and 35c, so that it is possible to further increase the contact distance and time with the heat collecting plate 30 and promote heat exchange. Is done.
  • FIG. 7 shows another embodiment of the sealing means 32c in plan sectional view and several sectional views.
  • 4A is a cross-sectional view taken along the line DD ′ of FIG. 4B
  • FIGS. 4B, 4C, and 4D are cross-sectional views taken along the line AA ′ of FIG. , BB ′ sectional view and CC ′ sectional view.
  • headers 50a and 50b are respectively formed in the vicinity of the short side of the sealing means 32c where the coolant or refrigerant supply hole 42c and the discharge hole 44c are formed, and the supply hole 42c side header 50a and the discharge hole side are formed.
  • a plurality of elongated channels are formed between the header 50b.
  • This flow path is obtained by alternately forming grooves 52 and lands 54 having a rectangular cross section on the surface of the sealing means 32c. According to the present embodiment, the flow path area is reduced, but the flow of the coolant or the refrigerant is rectified, so heat exchange is promoted by controlling the flow velocity of the flow.
  • FIG. 8 is an exploded perspective view showing another embodiment of the heat collecting apparatus 12f according to the present invention.
  • the present embodiment differs from the above embodiment in that an air heat insulating layer is formed on the back side of the support plate provided in the above embodiment in order to further reduce the heat radiation from the support plate.
  • a frame-shaped spacer 60 is disposed in close contact with the support plate 40a.
  • a cooling liquid supply hole 42 and a discharge hole 44 are formed in the support plate 40a.
  • a coolant supply pipe 47b and a coolant discharge pipe 48b that fit into the supply hole 42 and the discharge hole 44 are formed on the upper surface of the second support plate 40b.
  • the second support plate 40 b is disposed in close contact with the spacer 60 on the back side of the frame-shaped spacer 60.
  • the frame-like spacer 60 is reinforced with an O-ring, a gasket, a liquid sealing material or the like so as to be airtight with the support plates 40a and 40b.
  • the peripheral portion of each member is fastened with bolts and nuts.
  • a coolant supply pipe 47 and a coolant discharge pipe 48 are attached to the back surface of the second support plate 40b so as to correspond to the coolant supply pipe 47b and the coolant discharge pipe 48b. According to the present embodiment, heat radiation from the support plate can be further reduced than in the above embodiment due to the heat insulation effect of air.
  • cooling liquid is used as the cooling liquid or refrigerant, but the cooling liquid is not limited to water, and non-azeotropic refrigerants such as coolant and R407 can also be used.
  • non-azeotropic refrigerants such as coolant and R407
  • sealing means used in the heat collecting apparatus having the air heat insulating layer shown in the other embodiments any of the above embodiments and modifications can be used.
  • the heat collecting plate is not limited to the flat plate embodiment, but the one shown in the grooved embodiment can be used.
  • cooling liquid 46 ... cooling liquid flow path, 47, 47b ... cooling liquid supply piping 48, 48b ... Coolant discharge pipe, 50a ... Coolant supply space, 50b ... Coolant discharge space, 52 ... Groove, 54 ... Land, 56 ... Peripheral part, 58 ... Bottom plate part, 60 ... Spacer, 100 ... Solar energy Usage system.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention porte sur un système d'utilisation d'énergie solaire, lequel système possède une cellule solaire et est configuré de telle sorte que la cellule solaire est efficacement refroidie et de telle sorte qu'une chaleur générée par la cellule solaire est efficacement utilisée. Un système d'utilisation d'énergie solaire comporte une cellule solaire (10). Un dispositif de collecte de chaleur (12) pour collecter de la chaleur générée par la cellule solaire est disposé sur la surface inverse de la surface de réception de lumière de la cellule solaire. Le dispositif de collecte de chaleur possède une structure d'empilement formée par l'empilement d'une plaque de collecte de chaleur (30), de moyens d'étanchéité (32) et d'une plaque de support (40) les uns sur les autres. La conductivité thermique de la plaque de collecte de chaleur est supérieure à la conductivité thermique tout à la fois des moyens d'étanchéité et de la plaque de support.
PCT/JP2012/063804 2011-06-23 2012-05-29 Système d'utilisation d'énergie solaire WO2012176590A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-139349 2011-06-23
JP2011139349A JP2013008786A (ja) 2011-06-23 2011-06-23 太陽エネルギ利用システム

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WO2012176590A1 true WO2012176590A1 (fr) 2012-12-27

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FR3022994A1 (fr) * 2014-06-25 2016-01-01 Valeo Systemes Thermiques Echangeur de chaleur et procede de fabrication dudit echangeur de chaleur
CN111735330A (zh) * 2020-06-30 2020-10-02 晶科绿能(上海)管理有限公司 一种散热装置及电池组件制造设备
CN114294840A (zh) * 2022-01-12 2022-04-08 中北大学 一种设置反射镜的平板式太阳能集热器
CN116465101A (zh) * 2022-01-11 2023-07-21 山东大学 一种上下同时集热的太阳能集热器

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JP6466667B2 (ja) * 2014-08-27 2019-02-06 高砂熱学工業株式会社 太陽熱利用システム
WO2016065045A1 (fr) * 2014-10-23 2016-04-28 Solight Solar, Inc. Capteurs solaires à conversion thermique et échangeurs de chaleur à plaques minces pour des applications solaires
CN107208933A (zh) * 2014-10-23 2017-09-26 索莱特太阳能有限公司 用于太阳能应用的太阳能集热器和薄板热交换器
JP6598728B2 (ja) * 2016-04-28 2019-10-30 三菱電機株式会社 太陽電池モジュールおよび太陽電池システム
JP2017221007A (ja) * 2016-06-06 2017-12-14 大成建設株式会社 太陽電池パネル
JP2018096557A (ja) * 2016-12-08 2018-06-21 学校法人同志社 太陽エネルギー複合利用システムおよび該システムにおける太陽電池パネルの冷却方法、並びに熱回収システム

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WO2006038508A1 (fr) * 2004-10-06 2006-04-13 Tama-Tlo, Ltd. Systeme de cellules solaires et systeme de cellules solaires a chaleur/electricite combinees

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FR3022994A1 (fr) * 2014-06-25 2016-01-01 Valeo Systemes Thermiques Echangeur de chaleur et procede de fabrication dudit echangeur de chaleur
CN111735330A (zh) * 2020-06-30 2020-10-02 晶科绿能(上海)管理有限公司 一种散热装置及电池组件制造设备
CN111735330B (zh) * 2020-06-30 2022-05-17 晶科绿能(上海)管理有限公司 一种散热装置及电池组件制造设备
CN116465101A (zh) * 2022-01-11 2023-07-21 山东大学 一种上下同时集热的太阳能集热器
CN116465101B (zh) * 2022-01-11 2024-03-12 山东大学 一种上下同时集热的太阳能集热器
CN114294840A (zh) * 2022-01-12 2022-04-08 中北大学 一种设置反射镜的平板式太阳能集热器

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