共查询到20条相似文献,搜索用时 125 毫秒
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《现代制造技术与装备》2019,(9)
为满足太阳电池生产企业需求,采用长弧脉冲疝灯加光学系统组成太阳模拟器,设计了一种太阳电池组件测试系统,用于测试太阳电池各种参数。测试结果表明,该测试系统的光谱匹配度及辐照不均匀度均达到A等级技术指标要求。 相似文献
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小型可见光双视场光学系统的研制 总被引:2,自引:1,他引:1
基于光学设计基本理论,设计了一种体积小,跟踪范围可以达到整个前半球的可见光双视场光学系统.系统由前部集束系统,中间光路转折系统及后部成像系统3部分组成.集束系统采用望远镜式结构,用于改变光束的口径;光路转折系统采用库德光路,由4片反射镜组成,用于转折光路及扫描;成像系统由长焦成像系统和短焦成像系统组成,分别形成两个视场的像,用于目标识别与跟踪.光学系统焦距分别为60 mm和120 mm,设计传递函数在58 lp/mm处均大于0.5.加工装调后进行了成像试验验证,结果表明,该系统能够同时完成大视场及小视场的图像获取,在可视范围内成像质量满足系统总体要求. 相似文献
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纪浩 《仪器仪表与分析监测》2018,(2)
设计了针对线性菲涅尔聚光集热单元的控制系统,自动接收GPS信号计算太阳位置及太阳倾角,采用太阳视日运动轨迹跟踪方法,比较当前倾角与理论倾角的偏差,结合极限角度,驱动反射镜自动追踪太阳位置。设计了性能可靠的电机驱动电路和抗干扰能力强且符合ESD防护的RS485及RS232通信电路。经验证,控制系统具有稳定、高效、精确的优点,有助于提升线性菲涅尔系统的集热效率。 相似文献
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Núñez N Vázquez M González JR Jiménez FJ Bautista J 《The Review of scientific instruments》2011,82(2):024703
Concentrator photovoltaic is an emergent technology that may be a good economical and efficient alternative for the generation of electricity at a competitive cost. However, the reliability of these new solar cells and systems is still an open issue due to the high-irradiation level they are subjected to as well as the electrical and thermal stresses that they are expected to endure. To evaluate the reliability in a short period of time, accelerated aging tests are essential. Thermal aging tests for concentrator photovoltaic solar cells and systems under illumination are not available because no technical solution to the problem of reaching the working concentration inside a climatic chamber has been available. This work presents an automatic instrumentation system that overcomes the aforementioned limitation. Working conditions have been simulated by forward biasing the solar cells to the current they would handle at the working concentration (in this case, 700 and 1050 times the irradiance at one standard sun). The instrumentation system has been deployed for more than 10?000 h in a thermal aging test for III-V concentrator solar cells, in which the generated power evolution at different temperatures has been monitored. As a result of this test, the acceleration factor has been calculated, thus allowing for the degradation evolution at any temperature in addition to normal working conditions to be obtained. 相似文献
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Gallardo JJ Navas J Alcántara R Fernández-Lorenzo C Aguilar T Martín-Calleja J 《The Review of scientific instruments》2012,83(6):063105
This paper presents a non-conventional methodology and an instrumental system to measure the effect of temperature on the photovoltaic properties of solar cells. The system enables the direct measurement of the evolution of open-circuit voltage and short-circuit current intensity in relation to a continuously decreasing temperature. The system uses a high-intensity white light-emitting diode light source with low emissions of radiation in the infrared region of the electromagnetic spectrum, resulting in a reduced heating of the photovoltaic devices by the irradiation source itself. To check the goodness of the system and the methodology designed, several measurements were performed with monocrystalline silicon solar cells, dye-sensitized solar cells, and thin-film amorphous silicon solar cells, showing similar tendencies to those reported in the literature. 相似文献
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Navas J Alcántara R Fernández-Lorenzo C Martiín-Calleja J 《The Review of scientific instruments》2012,83(4):043102
This paper presents a quick methodology for focusing a laser beam on a photoactive surface based on performing a single line scan while simultaneously modifying the laser's position over the surface and the distance between the focusing lens and the active surface. The methodology was tested using the computer simulation technique. Several configurations were computer simulated by programming different experimental situations to discover the situations in which this focusing methodology would provide optimum results. The conclusions obtained from computer simulation methodology were checked by means of experimental tests using several solar cells, such as a thin-film amorphous silicon solar cell, a monocrystalline silicon solar cell, and a polycrystalline silicon solar cell. From the tests performed, we concluded that optimum focusing is achieved in systems in which the laser beam induced current signal generated by the photoactive surface has no large heterogeneities (e.g., fingers or grain boundaries), artefacts, or defects. Thus, the best results are achieved in systems where the surface of the photovoltaic device has a certain degree of homogeneity. 相似文献
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Design of Reflective Concentrator Model with Application for Concentrator Photovoltaic System 总被引:2,自引:0,他引:2
SU Zhongyuan ZHANG Yaoming JIA Minping SUN Liguo XU Feiyun WANG Jun School of Energy & Environment Southeast University Nanjing China School of Mechanical Engineering China Received February revised January accepted June published electronically November 《机械工程学报(英文版)》2011,(6):1007-1012
The nonuniform irradiation in the standard photovoltaic(PV) cells causes their relatively high series resistance,which results in a considerably lowered efficiency of PV cells.Currently the concentrator of uniform irradiation designed for concentrator photovoltaic is rare in China and lack sufficient theoretical research.In this paper,a systematic research on the solar reflective concentrator is conducted.A novel structure for a solar reflective concentrator is designed with the application of a flat mirror matrix to concentrate the sunlight for concentrator photovoltaic(CPV) systems.Sunlight beams are focused through the reflection of the mirror array on the solar cell to generate electricity.The concentrator is capable of producing much more uniform sunlight with a certain concentration ratio.The design scheme includes laying out the flat mirrors,optimizing the optical pathway and the parameters of each mirror.The prototype of the CPV system was installed at Nanjing,China.In the configuration of the prototype,it is composed of 24 pieces parallelogram flat mirrors,which are arranged into a total reflective array of 5 rows and 5 columns.In comparison with the parabolic trough concentrator,the experimental measurements verify such design has high efficiency.The concentrator model of a flat mirror matrix and the proposed new design method will lay a solid foundation for designing the concentrator of uniform irradiation. 相似文献
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《Measurement》1986,4(2):42-48
The first part of this paper describes basic parameters for the determination of the conversion efficiency as well as the energy loss of solar cells. The second part contains different methods for solar cell calibrations: four direct methods and the absolute differential spectral responsivity method. In the last part, space- and terrestrial applications of photovoltaic solar energy generators are given. 相似文献
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N. A. Pakhanov V. M. Andreev M. Z. Shvarts O. P. Pchelyakov 《Optoelectronics, Instrumentation and Data Processing》2018,54(2):187-202
Multi-junction solar cells based on III–V compounds are the most efficient converters of solar energy to electricity and are widely used in space solar arrays and terrestrial photovoltaic modules with sunlight concentrators. All modern high-efficiency III–V solar cells are based on the long-developed triple-junction III–V GaInP/GaInAs/Ge heterostructure and have an almost limiting efficiency for a given architecture — 30 and 41.6% for space and terrestrial concentrated radiations, respectively. Currently, an increase in efficiency is achieved by converting from the 3-junction to the more efficient 4-, 5-, and even 6-junction III–V architectures: growth technologies and methods of post-growth treatment of structures have been developed, new materials with optimal bandgaps have been designed, and crystallographic parameters have been improved. In this review, we consider recent achievements and prospects for the main directions of research and improvement of architectures, technologies, and materials used in laboratories to develop solar cells with the best conversion efficiency: 35.8% for space, 38.8% for terrestrial, and 46.1% for concentrated sunlight. It is supposed that by 2020, the efficiency will approach 40% for direct space radiation and 50% for concentrated terrestrial solar radiation. This review considers the architecture and technologies of solar cells with record-breaking efficiency for terrestrial and space applications. It should be noted that in terrestrial power plants, the use of III–V SCs is economically advantageous in systems with sunlight concentrators. 相似文献