CN204760403U - A solar photovoltaic receiver for dish formula high power condenser system - Google Patents
A solar photovoltaic receiver for dish formula high power condenser system Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
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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
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Abstract
本实用新型公开一种用于碟式高倍聚光系统的太阳能光伏接收器，包括透明板、绝缘光学流体、聚光太阳电池组件和金属基板，透明板具有碟式抛物面部分，在透明板的碟式抛物面部分的外表面设置有涂层，透明板通过侧壁与金属基板固定连接形成流道，流道内充满绝缘光学流体，侧壁上设置有流体进口和流体出口，金属基板包括碟式抛物面部分和平面部分，电池组件设置在金属基板的碟式抛物面部分，采用绝缘光学流体浸没聚光电池组件，既提高了碟式高倍聚光光伏系统的聚光比和光学效率，又解决了系统的散热难题，同时把固定安装电池组件的金属基板部分设计成碟式抛物面状，提高了焦斑处光强分布的均匀度，提高系统发电效率，降低光伏发电成本。
The utility model discloses a solar photovoltaic receiver for a dish-type high-power concentrating system, which comprises a transparent plate, an insulating optical fluid, a concentrating solar cell component and a metal substrate. The outer surface of the type parabolic part is provided with a coating, the transparent plate is fixedly connected with the metal substrate through the side wall to form a flow channel, the flow channel is filled with insulating optical fluid, the side wall is provided with a fluid inlet and a fluid outlet, and the metal substrate includes a dish-type paraboloid part And the flat part, the battery components are arranged on the dish-shaped parabolic part of the metal substrate, and the insulating optical fluid is used to immerse the concentrator battery components, which not only improves the light concentration ratio and optical efficiency of the dish-type high-power concentrating photovoltaic system, but also solves the problem of heat dissipation of the system At the same time, the metal substrate part of the fixed battery module is designed as a dish paraboloid, which improves the uniformity of the light intensity distribution at the focal spot, improves the system power generation efficiency, and reduces the cost of photovoltaic power generation.
Description
技术领域technical field
本实用新型属于太阳能光伏发电技术领域，具体涉及一种用于碟式高倍聚光系统的太阳能光伏接收器。The utility model belongs to the technical field of solar photovoltaic power generation, in particular to a solar photovoltaic receiver used in a dish-type high-power concentrating system.
背景技术Background technique
太阳能光伏发电是近年来太阳能众多利用方式中发展最快、最具活力的研究领域。然而，由于缺乏有竞争力的装机成本和上网电价，光伏产业一直没有取得突飞猛进的发展。从技术上解决光伏发电的成本问题，已经成为制约光伏发展的根本性问题。其中，采用聚光光伏技术来提高光电转换效率、降低光伏发电成本被寄予厚望。尤其是近年来随着III–V族多结太阳电池效率的不断提升，采用此类电池的高倍聚光光伏系统逐步成为探索和研究的前沿。Solar photovoltaic power generation is the fastest growing and most dynamic research field among the many utilization methods of solar energy in recent years. However, due to the lack of competitive installation costs and feed-in tariffs, the photovoltaic industry has not achieved rapid development. Technically solving the cost of photovoltaic power generation has become a fundamental problem restricting the development of photovoltaics. Among them, the use of concentrating photovoltaic technology to improve photoelectric conversion efficiency and reduce the cost of photovoltaic power generation has high hopes. Especially in recent years, with the continuous improvement of the efficiency of III-V multi-junction solar cells, the high-efficiency concentrating photovoltaic system using such cells has gradually become the frontier of exploration and research.
但是，即使III–V族多结电池在实际系统中有近40％的转换效率，仍然有近60％左右的能量转化为热，而且热量会随着聚光比的增加而增加。温度的升高会使太阳电池开路电压急剧降低以及转换效率的下降，长时间的高温还会缩短电池的使用寿命。另一方面由于构成电池组件的不同材料具有不同的热膨胀系数，长期热应力的作用会使组件结构永久破坏。因此，研发具有高散热能力的冷却技术来保证聚光太阳电池在较高效率下可靠工作，进而对降低光伏发电成本有重要意义。特别是对于碟式高倍聚光光伏系统，因为该系统中的电池上的所有热量只能通过与电池等大小的表面且垂直的方向散去。目前，碟式高倍聚光光伏系统多采用间壁式的主动冷却方式，这样只能利用电池的背面来散热且很难进一步降低电池和散热器间的热阻以满足更高聚光比和电池散热均匀性的要求。However, even though III–V multi-junction cells have nearly 40% conversion efficiency in practical systems, nearly 60% of the energy is still converted into heat, and the heat will increase with the concentration ratio. An increase in temperature will sharply reduce the open circuit voltage of the solar cell and decrease the conversion efficiency, and prolonged high temperature will also shorten the service life of the cell. On the other hand, due to the different thermal expansion coefficients of different materials that make up the battery components, the long-term thermal stress will permanently damage the component structure. Therefore, it is of great significance to develop cooling technology with high heat dissipation capacity to ensure the reliable operation of concentrating solar cells at higher efficiency, which in turn is of great significance to reduce the cost of photovoltaic power generation. Especially for the dish-type high concentration photovoltaic system, because all the heat on the battery in the system can only be dissipated through the surface of the same size as the battery and in the vertical direction. At present, the dish-type high-power concentrating photovoltaic system mostly adopts the active cooling method of the partition wall, which can only use the back of the battery to dissipate heat, and it is difficult to further reduce the thermal resistance between the battery and the radiator to achieve a higher concentration ratio and uniformity of battery heat dissipation requirements.
此外，现有的碟式高倍聚光光伏系统存在的另一个问题是焦斑处的光强通常呈高斯分布，即光强分布不均匀。而该系统采用的传统接收器中的聚光电池组件又是由多个电池经过串并联而成的平面方形结构。所以光强分布不均匀就会导致接收器中的各个电池的温度、电流和电压存在不同，从而导致系统发电效率下降。In addition, another problem existing in the existing dish-type high-power concentrating photovoltaic system is that the light intensity at the focal spot usually has a Gaussian distribution, that is, the light intensity distribution is not uniform. The concentrating cell assembly in the traditional receiver used in this system is a planar square structure formed by connecting multiple cells in series and parallel. Therefore, the uneven distribution of light intensity will cause the temperature, current and voltage of each battery in the receiver to be different, resulting in a decrease in the power generation efficiency of the system.
实用新型内容Utility model content
本实用新型的目的在于，克服现有技术中存在的不足，提供一种用于碟式高倍聚光系统的太阳能光伏接收器，解决碟式高倍聚光光伏系统的散热难题和焦斑处光强分布不均匀导致的系统发电效率下降的问题，提高整个系统的发电效率，降低光伏发电成本。The purpose of the utility model is to overcome the deficiencies in the prior art, provide a solar photovoltaic receiver for a dish-type high-power concentrating system, and solve the problem of heat dissipation and the light intensity at the focal spot of the dish-type high-power concentrating photovoltaic system The problem of system power generation efficiency decline caused by uneven distribution can improve the power generation efficiency of the entire system and reduce the cost of photovoltaic power generation.
实现本实用新型目的的技术解决方案为：The technical solution to realize the purpose of this utility model is:
一种用于碟式高倍聚光系统的太阳能光伏接收器，包括透明板、绝缘光学流体、聚光太阳电池组件和金属基板，其特征在于：所述透明板至少包括受光的碟式抛物面部分，在所述透明板的受光的碟式抛物面部分的外表面设置有在聚光太阳电池工作波段内透光的涂层，所述金属基板包括碟式抛物面部分和平面部分，所述透明板、金属基板与侧壁围成一个流道，所述聚光太阳电池组件设置在所述金属基板的碟式抛物面部分、且位于流道内，流道内充满所述绝缘光学流体，侧壁上设置有绝缘光学流体进口和绝缘光学流体出口。A solar photovoltaic receiver for a dish-type high-power concentrating system, including a transparent plate, an insulating optical fluid, a concentrating solar cell module, and a metal substrate, characterized in that: the transparent plate includes at least a light-receiving dish-shaped parabolic portion, The outer surface of the light-receiving dish-shaped paraboloid part of the transparent plate is provided with a light-transmitting coating in the working band of the concentrating solar cell. The metal substrate includes a dish-shaped paraboloid part and a plane part. The transparent plate, metal The base plate and the side wall form a flow channel, the concentrating solar cell assembly is arranged on the dish-shaped paraboloid part of the metal substrate and is located in the flow channel, the flow channel is filled with the insulating optical fluid, and the insulating optical fluid is arranged on the side wall. Fluid inlet and insulating optical fluid outlet.
优选地，所述绝缘光学流体采用具有高折射率的硅油或矿物油。Preferably, the insulating optical fluid adopts silicone oil or mineral oil with high refractive index.
优选地，所述聚光太阳电池组件采用聚光硅太阳电池组，所述涂层透光波段为400～1200nm。Preferably, the concentrating solar cell module is a concentrating silicon solar cell group, and the light transmission band of the coating is 400-1200 nm.
优选地，所述聚光太阳电池组件采用聚光III–V族多结太阳电池组，所述涂层透光波段为300～1800nm。Preferably, the concentrating solar cell module is a concentrating III-V group multi-junction solar cell group, and the light transmission band of the coating is 300-1800 nm.
优选地，所述透明板采用超白玻璃或石英玻璃。Preferably, the transparent plate is made of ultra-clear glass or quartz glass.
优选地，所述透明板还包括平面部分。Preferably, the transparent plate further includes a planar portion.
本实用新型与现有技术相比的优点在于：Compared with the prior art, the utility model has the following advantages:
(1)采用绝缘光学流体浸没聚光太阳电池组件，一方面，增大了聚光电池的散热面积和消除了聚光电池和散热器间的热阻，从而大幅度降低了电池的温升，提高了电池的光电转换效率；另一方面，光线经过具有高折射率的绝缘光学流体后到达电池组件，可以增大电池组件接收的有效聚光比和提高系统的光学效率。(1) Using insulating optical fluid to immerse the concentrator solar cell module, on the one hand, it increases the heat dissipation area of the concentrator cell and eliminates the thermal resistance between the concentrator cell and the radiator, thereby greatly reducing the temperature rise of the battery and improving the The photoelectric conversion efficiency of the battery; on the other hand, the light reaches the battery component after passing through an insulating optical fluid with a high refractive index, which can increase the effective concentration ratio received by the battery component and improve the optical efficiency of the system.
(2)把透明板设计成碟式抛物面和平面两部分，并让光线通过碟式抛物面部分，这样透明板不仅可以起到组成绝缘光学流体流道的作用，其碟式抛物面部分还具备透镜的功能，进一步把来自碟式高倍聚光器的汇聚太阳光聚焦到聚光电池组件上，提高了电池组件上的光强，降低了光伏发电成本。(2) Design the transparent plate into two parts: a dish paraboloid and a plane, and let the light pass through the dish paraboloid, so that the transparent plate can not only play the role of forming an insulating optical fluid channel, but the dish paraboloid also has a lens Function, to further focus the converging sunlight from the dish-type high-power concentrator onto the concentrator battery module, improve the light intensity on the battery module, and reduce the cost of photovoltaic power generation.
(3)把固定安装聚光太阳电池组件的金属基板部分设计成碟式抛物面状，和系统采用的聚光器形状几何相似，可以提高碟式高倍聚光光伏系统焦斑处的光强分布均匀度，从而提高整个系统的发电效率。(3) Design the metal substrate part of the fixed installation concentrating solar cell module into a dish-shaped paraboloid, which is geometrically similar to the concentrator used in the system, which can improve the uniform distribution of light intensity at the focal spot of the dish-type high-power concentrating photovoltaic system degree, thereby improving the power generation efficiency of the entire system.
(4)在透明板的碟式抛物面部分的外表面采用选择性涂层，可以有选择地透过聚光太阳电池工作波段内的光线，阻挡一部分非工作波段内的光线的透过，这样可以从源头上解决聚光太阳电池过热的可能，使得电池工作效率更高。(4) Selective coating is used on the outer surface of the dish paraboloid part of the transparent plate, which can selectively pass through the light in the working band of the concentrating solar cell and block the transmission of part of the light in the non-working band, which can Solve the possibility of overheating of concentrated solar cells from the source, making the cells work more efficiently.
附图说明Description of drawings
图1为本实用新型所述的太阳能光伏接收器的结构示意图。Fig. 1 is a schematic structural diagram of a solar photovoltaic receiver described in the present invention.
图中，In the figure,
1-涂层、2-透明板、3-透明板的碟式抛物面部分、4-透明板的平面部分、5-绝缘光学流体出口、6-侧壁、7-流道、8-绝缘光学流体、9-聚光太阳电池组件、10-金属基板、11-金属基板的碟式抛物面部分、12-金属基板的平面部分、13-绝缘光学流体进口、14-汇聚太阳光。1-coating, 2-transparent plate, 3-dish parabolic part of the transparent plate, 4-plane part of the transparent plate, 5-insulating optical fluid outlet, 6-side wall, 7-flow channel, 8-insulating optical fluid , 9-concentrating solar battery module, 10-metal substrate, 11-dish parabolic part of the metal substrate, 12-plane part of the metal substrate, 13-insulating optical fluid inlet, 14-concentrating sunlight.
具体实施方式Detailed ways
下面结合附图以及具体实施例对本实用新型作进一步的说明，但本实用新型的保护范围并不限于此。The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the utility model is not limited thereto.
如图1所示，本实用新型所述的太阳能光伏接收器，包括透明板2、绝缘光学流体8、聚光太阳电池组件9和金属基板10，透明板2由受光的碟式抛物面部分3和不受光的平面部分4组成，在透明板2的受光的碟式抛物面部分3的外表面设置有在聚光太阳电池工作波段内透光的涂层1，透明板2通过侧壁6与金属基板10固定连接形成一个流道7，流道7内充满绝缘光学流体8，侧壁6上设置有绝缘光学流体进口13和绝缘光学流体出口5，金属基板10包括碟式抛物面部分11和平面部分12，聚光太阳电池组件9设置在金属基板10的碟式抛物面部分11。As shown in Figure 1, the solar photovoltaic receiver described in the utility model comprises a transparent plate 2, an insulating optical fluid 8, a concentrating solar cell assembly 9 and a metal substrate 10, and the transparent plate 2 is composed of a light-receiving dish-type parabolic portion 3 and It is composed of a flat part 4 that is not exposed to light. On the outer surface of the light-receiving dish paraboloid part 3 of the transparent plate 2, a coating 1 that transmits light in the working band of the concentrating solar cell is provided. The transparent plate 2 passes through the side wall 6 and the metal substrate. 10 are fixedly connected to form a flow channel 7, the flow channel 7 is filled with an insulating optical fluid 8, the side wall 6 is provided with an insulating optical fluid inlet 13 and an insulating optical fluid outlet 5, and the metal substrate 10 includes a dish-shaped paraboloid part 11 and a planar part 12 , the concentrating solar cell module 9 is arranged on the dish-shaped parabolic part 11 of the metal substrate 10 .
具体地，绝缘光学流体8采用具有高折射率的硅油或矿物油。聚光太阳电池组件9采用聚光硅太阳电池组或聚光III–V族多结太阳电池组。透明板2采用超白玻璃或石英玻璃。Specifically, silicone oil or mineral oil with a high refractive index is used as the insulating optical fluid 8 . Concentrating solar cell module 9 adopts concentrating silicon solar cells or concentrating III-V group multi-junction solar cells. The transparent plate 2 adopts ultra-clear glass or quartz glass.
当聚光太阳电池组件9采用聚光硅太阳电池组时，则涂层1透光波段为400～1200nm；当聚光太阳电池组件9采用聚光III–V族多结太阳电池组时，则涂层1透光波段为300～1800nm。When the concentrating solar cell module 9 adopts a concentrating silicon solar cell group, the light transmission band of the coating 1 is 400-1200nm; when the concentrating solar cell module 9 adopts a concentrating III-V multi-junction solar cell group, then The light transmission band of coating 1 is 300-1800nm.
本实用新型的工作原理为：The working principle of the utility model is:
来自碟式高倍聚光器的汇聚太阳光14通过采用超白玻璃或石英玻璃的透明板2的碟式抛物面部分3，进一步汇聚到采用聚光硅太阳电池组或聚光III–V族多结太阳电池组的聚光太阳电池组件9上，为了从源头上解决聚光太阳电池组件9过热的可能，在透明板2的受光的碟式抛物面部分3的外表面设置有在聚光太阳电池工作波段内透光的涂层1，涂层1可以阻挡一部分聚光太阳电池非工作波段内的光线的透过；汇聚到聚光太阳电池组件9上的太阳光转变为电能和热量，电能提供给用户使用，电池内的大部分热量传递给由透明板2、金属基板10和侧壁6构造的流道7内的绝缘光学流体8，为了进一步增大聚光太阳电池组件9接收的有效聚光比和提高系统的光学效率，绝缘光学流体8采用具有高折射率的硅油或矿物油，侧壁6上设置有绝缘光学流体进口13和绝缘光学流体出口5；聚光太阳电池组件9设置在金属基板10的碟式抛物面部分11，把固定安装聚光太阳电池组件9的金属基板部分设计成与聚光器的形状几何相似，这样可以提高系统焦斑处光强分布的均匀度，从而提高系统发电效率。The concentrating sunlight 14 from the dish-type high-power concentrator passes through the dish-type parabolic part 3 of the transparent plate 2 using ultra-white glass or quartz glass, and further converges to the concentrating silicon solar cell group or concentrating III-V multi-junction On the concentrating solar cell assembly 9 of the solar cell group, in order to solve the possibility of overheating of the concentrating solar cell assembly 9 from the source, the outer surface of the light-receiving dish-shaped parabolic part 3 of the transparent plate 2 is provided with a working concentrating solar cell The light-transmitting coating 1 in the wavelength band, the coating 1 can block the transmission of light in the non-working band of a part of the concentrating solar cell; the sunlight converging on the concentrating solar cell module 9 is converted into electrical energy and heat, and the electrical energy is provided to When used by the user, most of the heat in the battery is transferred to the insulating optical fluid 8 in the flow channel 7 constructed by the transparent plate 2, the metal substrate 10 and the side wall 6, in order to further increase the effective concentration received by the concentrating solar cell module 9 ratio and improve the optical efficiency of the system, the insulating optical fluid 8 adopts silicone oil or mineral oil with a high refractive index, and the side wall 6 is provided with an insulating optical fluid inlet 13 and an insulating optical fluid outlet 5; the concentrating solar cell assembly 9 is arranged on a metal The dish-shaped parabolic part 11 of the substrate 10 is designed to fix the metal substrate part of the concentrating solar cell assembly 9 to be geometrically similar to the shape of the concentrator, so that the uniformity of the light intensity distribution at the focal spot of the system can be improved, thereby improving the system. power generation efficiency.
所述实施例为本实用新型的优选的实施方式，但本实用新型并不限于上述实施方式，在不背离本实用新型的实质内容的情况下，本领域技术人员能够做出的任何显而易见的改进、替换或变型均属于本实用新型的保护范围。Described embodiment is the preferred embodiment of the present utility model, but the present utility model is not limited to above-mentioned embodiment, under the situation of not departing from the essential content of the present utility model, any obvious improvement that those skilled in the art can make , replacement or modification all belong to the protection scope of the present utility model.
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| CN106452341A (en) * | 2016-11-30 | 2017-02-22 | 戚明海 | Solar photovoltaic power generation system |
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