二次反射聚光分频光伏系统的三维光学模型

建立了考虑太阳张角的抛物槽式二次反射聚光分频光伏系统的三维光学模型,模拟计算了分频器和光伏电池表面入射的能流密度分布情况,结果表明:受分频器对入射光遮拦和抛物槽中心安装光电池的影响分频器表面能流密度分布中心低两边均匀,而光伏电池表面能流密度分布中间高两边低.分析了不同跟踪系统误差对能流密度及集光效率的影响.     

单抛物反射面聚光光伏系统的性能研究

为了提高常规光伏电池组件利用率,该文采用单抛物反射面建立了聚光光伏系统,并与常规平板系统对比,进行了性能研究.该系统利用控制机构,根据太阳高度角决定单抛物反射面是否立起工作,对太阳辐射低倍率聚光,避免了聚光后辐照度过高,表面温度升高也较小.对比常规平板系统,夏至附近短路电流提高了约12.6%,开路电压提高了约0.5%;冬至附近,短路电流提高了约36.4%,开路电压提高了约1.4%.另一方面,夏至附近不聚光的最高辐照度为842W/m2,冬至附近聚光的最高辐照度为834W/m2,不会损伤光伏电池组件,可采用普通多晶硅光伏电池组件,且不需要冷却系统.研究表明,采用该系统能以较小的成本获得以上受益,发掘了常规光伏电池组件应用潜力,为进一步提高光伏发电系统的性价比提供了方法.     

两级聚光光伏系统中砷化镓电池特性的实验研究

针对一般聚光系统中光斑不均匀而导致电池性能下降的问题,设计并搭建了具有二级聚光器的碟式聚光光伏发电系统,介绍了系统的结构及工作原理,进行了户外实验。在相同聚光比条件下(150X),与单级聚光系统相比,三结砷化镓光伏电池的平均峰值功率为1.515 W/cm2,平均效率为29.29%,平均峰值功率和平均效率分别提高了23.32%和9.12%。     

常规单晶硅太阳电池在低倍聚光条件下应用研究

利用常规单晶硅光伏电池，在进行输出特性研究的基础上，设计研制出带有非对称复合抛物面聚光器的光伏发电系统。该系统利用聚光器的有效聚光比随季节的变化，使光电池上接收到的太阳辐射量全年相对均衡，结果不仅降低了发电成本而且可改善系统的可靠性。     

光伏聚光器的研究现状及发展趋势

介绍了聚光光伏系统降低发电成本的原理和光伏聚光器的研究现状。总结了光伏聚光器的分类方法和工作原理,并详细介绍了几种混合聚光器的性能特点。讨论了设计光伏聚光器时需要考虑的因素。最后介绍了新型聚光器的工作原理和特点,分析了光伏聚光器的发展趋势。     

建筑一体化500倍聚光组件光电特性实验与模拟研究

利用砷化镓聚光太阳电池设计制作建筑一体化高倍(500倍)聚光光伏组件,采用TracePro软件对组件光学性能进行了模拟分析,同时对组件光、电特性进行了实验检测.模拟结果表明经一次聚光后光斑尺寸为15 mm×15 mm,二次聚光器的能量损失为4.1％,跟踪误差在±0.5°以内时对组件聚光效率影响较小,组件聚光效率达到78...     

高聚光条件下砷化镓光伏电池特性的实验研究

设计并搭建了一种碟式聚光光伏发电系统,介绍了系统的结构,阐述了系统工作原理,并对其进行了户外实验研究。根据实验结果,该碟式聚光光伏系统的几何聚光倍数为150倍,其峰值功率为1.5315W/cm2,平均效率为26.58%,电池平均工作温度为46.875℃。太阳直接辐射强度和电池温度是影响三结砷化镓光伏电池性能的主要因素。与现有的单晶硅光伏电池片相比,三结砷化镓聚光光伏电池具有转换效率高、电学性能好等特点,所收集的电池温度、输出功率、效率等数据对碟式聚光光伏系统的进一步研究具有一定参考价值。     

便携式太阳能电池组件测试仪

由信息产业部电子第十八研究所承担的国家九五科技攻关项目“便携式太阳能电池组件测试仪”,已于2001年2月在北京通过了专家组的验收。目前,该项目正在进行性能的优化及校准工作以保证在实际应用中更可靠。该测试仪将于近期正式投放市场。常规的太阳电池组件测试仪器仅局限于实验室内使用,需要设计良好的人造光源以匹配标准光源。为了满足在野外对太阳电池组件进行测试的要求,我们设计制造了利用自然光源进行测试的便携式太阳电池组件测试仪。测试仪设计的主导思想是通过对标准电池组件在标准测试条件及实测条件下的性能参数的比较,把…     

太阳电池组件封装工艺研究

分析了太阳电池组件三种封装工艺的优缺点,并对自行研制的紫外固化胶的装胶黏度及透光率进行了测试,获得了基本适合于透明光伏组件紫外固化封装要求的紫外固化封装胶。     

基于ProE的太阳电池组件层压机的设计

在确定太阳电池组件层压机总体结构和功能要求的基础上,利用逆向设计思路、Pro/E的三维造型对层压机进行模型设计,对各种零件进行模拟装配及运动分析,检查机械各构件运动是否发生干涉;再运用Pro/Mechanica模块进行有限元分析,对传动机构进行力学计算.通过模仿真实环境下的工作发现并改正设计上的问题,最终完成太阳电池组件层压机的设计与制造.     

Performance of amorphous silicon solar cell module and solar lantern

The solar lantern (manufactured by BHEL) could regularly be lit for 5–6 h up to a maximum of 7 h, if the battery was fully charged. It is desirable, for regular use, that the solar lantern should be lit for not more than 5 h a day if the clear sky condition exists. If the weather is partially cloudy, use of the lantern should be reduced accordingly. A performance study of the amorphous silicon (a-Si) module shows that the maximum power transfer voltage (V_mp) and corresponding current is ca. 65 and 75% of the open circuit voltage (V_oc) and short circuit current (I_sc), respectively. Efficiency of the module is 3–4% under field conditions and is slightly greater for a higher ambient temperature.     

A concentrator module of spherical Si solar cell

Spherical Si solar cell, which is made up of Si spheres with a diameter of approximately 1.0 mm, is expected to be a promising candidate for low consumption of Si feedstock and simple process technology. This paper describes the formation process and the structure of a concentrator module in detail. The concentrator lens was formed by casting with ultraviolet light hardening resin. The concentration ratio was 4.4 times and the pitch between the spheres was 2.0 mm. By this module design, it was possible to realize a consumption of the Si feedstock of about 3.0 g/W. Conversion efficiencies of 11.3% from single-sphere cell, 8.5% from a 23-spheres module and 5.2% from a 105-spheres module under AM1.5, 100 mW/cm² illumination were achieved.     

A high efficiency thin film silicon solar cell and module

A photoelectric conversion efficiency of over 10% has been achieved in thin-film microcrystalline silicon solar cells which consist of a 2 μm thick layer of polycrystalline silicon. It was found that an adequate current can be extracted even from a thin film due to the very effective light trapping effect of silicon with a low absorption coefficient. As a result, this technology may eventually lead to the development of low-cost solar cells. Also, an initial aperture efficiency as high as 13.5% has been achieved with a large area (91 cm × 45 cm) tandem solar cell module of microcrystalline silicon and amorphous silicon (thin film Si hybrid solar cell). An even greater initial efficiency of 14.7% has been achieved in devices with a small size (area of 1 cm²), and further increases of efficiency can be expected.     

The 3-dimensional dye-sensitized solar cell and module based on all titanium substrates

Here we report a 3-dimensional dye-sensitized solar cell (3D-DSSCs) and module simulating the fractal structure of the pine tree for capturing sunlight. Compared to traditional flat solar cells, this type of solar cell exhibits superiority of absorbing sunlight from all directions. The fabricated 3D-DSSC and module have achieved 3.36% and 3.19% efficiencies, respectively. The results show that the shade has little effect on the performance of 3D-DSSC and module. It is expected that this 3D-DSSC and module have strong potential for practical application due to their 3D light utilization.     

Innovation in concentrated solar power

This work focuses on innovation in CSP technologies over the last decade. A multitude of advancements has been developed during this period, as the topic of concentrated solar power is becoming more mainstream. Improvements have been made in reflector and collector design and materials, heat absorption and transport, power production and thermal storage. Many applications that can be integrated with CSP regimes to conserve (and sometimes produce) electricity have been suggested and implemented, keeping in mind the environmental benefits granted by limited fossil fuel usage.     

A glass frit-sealed dye solar cell module with integrated series connections

As the dye solar cell (DSC) technology progresses from laboratory-scale to large-area applications, long-term stability is one major obstacle. Especially for large-area DSC modules, stability is often a matter of hermetic sealing both between cells and for the whole module. Here we suggest glass frit as sealing material. Glass frit is thermally, mechanically and chemically very stable and can be applied via screen printing.DSC modules of 30×30 cm² with a glass frit as primary sealing material have been produced.It was shown that glass frit is applicable for the upscaling of the DSC technology to large areas. The thermal stability of the glass frit sealing and the integrated series connections was verified in a thermal cycling from −40 to 80 °C.The colouration process has been scaled up to 30×30 cm² by pumping the dye solution through the module using only two filling holes. By heating the module to 70 °C the filling of the module with electrolytes based on high viscous ionic liquids was demonstrated.     

The mathematical modeling of concentrated photovoltaic module temperature

In this study, we examined the effect of the use of paraffin wax on the panel temperature of concentrated solar panels. Some tests were performed on various days for three months (including spring, summer, and winter months). With the help of the experimental results, new approaches have been made as concentrator ratio, area ratio, concentrator efficiency and power coefficient. As a result of this approaches the concentrator ratio was found to be 3. When the concentrator ratio was 3, the panel temperature of the system with paraffin was found to be between 80 and 100 °C, while that of the other system was found to be above 100 °C. Panel efficiency might be reduced down to 10% at these temperatures. The study also included the development of a mathematical model of the changes in the panel temperature of the concentrated systems in which paraffin was not used. The temperature at the back of the panels could be calculated by this mathematical model, depending on the ambient temperature and the concentrated solar radiation. The correlation coefficient of the mathematical model was found to be 0.929. The test results of two days, which were not included in the model, were used to determine the reliability of the model, and the panel temperatures were calculated using the correlation coefficients of 0.933 and 0.966.