共查询到20条相似文献,搜索用时 125 毫秒
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该文基于海南某小型光伏电站测试项目,收集p型和n型2种光伏组件在2021年的发电量数据,对比分析这2种组件在不同月份下的单瓦日均发电量,验证n型光伏组件相较于p型组件发电效率方面的优越性。在光伏电站实际工作条件下测试辐照度和温度对2种组件发电性能的影响,结果表明:n型光伏组件弱光性能更好;在高温条件下有更多的发电量增益,证明n型光伏组件的热稳定性更好,与理论上n型光伏组件功率温度系数更小相符。通过研究2种组件在不同天气下的直流功率,发现n型光伏组件在辐照度突降的情况下也保持优越的发电性能。 相似文献
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《太阳能》2020,(7)
p-PERC+、n-PERT等结构的高效太阳电池的转换效率持续提升,双面化的结构设计在各类高效太阳电池和光伏组件中得以规模化普及应用。双面发电技术大幅降低了度电成本,可双面发电的光伏组件已经成为行业发展的大趋势。对于双面光伏组件的PID问题,可使用抗PID的增强型POE胶膜封装来解决,背面封装主要是使用玻璃或透明背板材料,但背面封装材料的长期可靠性仍需要进行验证。对比分析了透明PVF薄膜、PVDF薄膜、超耐候氟涂层膜等氟保护层材料的优劣,对耐紫外、耐湿热、UV+DH同步老化等性能进行对比,选择出性能更可靠的原材料及透明背板材料,并提供了高可靠性的透明背板封装解决方案。 相似文献
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B. Robles-Ocampo E. Ruíz-Vasquez H. Canseco-Snchez R.C. Cornejo-Meza G. Trpaga-Martínez F.J. García-Rodriguez J. Gonzlez-Hernndez Yu.V. Vorobiev 《Solar Energy Materials & Solar Cells》2007,91(20):1966-1971
Electric energy production with photovoltaic (PV)/thermal solar hybrid systems can be enhanced with the employment of a bifacial PV module. Experimental model of a PV/thermal hybrid system with such a module was constructed and studied. To make use of both active surfaces of the bifacial PV module, we designed and made an original water-heating planar collector and a set of reflecting planes. The heat collector was transparent in the visible and near-infrared spectral regions, which makes it compatible with the PV module made of crystalline Si. The estimated overall solar energy utilization efficiency for the system related to the direct radiation flux is of the order of 60%, with an electric efficiency of 16.4%. 相似文献
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提高发电效率是光伏模块进一步大规模应用的关键。温度是影响光伏模块发电效率的重要因素之一,尤其对屋顶分布式光伏系统而言。基于某屋顶分布式光伏电站运行数据,分析了温度对光伏模块发电效率的影响。通过建立多元线性回归模型探讨了环境温度与电池板发电效率的关系,并提出了一种拟合度较高的理论发电量计算模型。该模型可用于计算电站的应发电量和相应的损失发电量,以便综合考虑收益与成本,判断是否采取适当的降温措施。 相似文献
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Solar energy has been increasing its share in the global energy structure. However, the thermal radiation brought by sunlight will attenuate the efficiency of solar cells. To reduce the temperature of the photovoltaic (PV) cell and improve the utilization efficiency of solar energy, a hybrid system composed of the PV cell, a thermoelectric generator (TEG), and a water-cooled plate (WCP) was manufactured. The WCP cannot only cool the PV cell, but also effectively generate additional electric energy with the TEG using the waste heat of the PV cell. The changes in the efficiency and power density of the hybrid system were obtained by real time monitoring. The thermal and electrical tests were performed at different irradiations and the same experiment temperature of 22°C. At a light intensity of 1000 W/m2, the steady-state temperature of the PV cell decreases from 86.8°C to 54.1°C, and the overall efficiency increases from 15.6% to 21.1%. At a light intensity of 800 W/m2, the steady-state temperature of the PV cell decreases from 70°C to 45.8°C, and the overall efficiency increases from 9.28% to 12.59%. At a light intensity of 400 W/m2, the steady-state temperature of the PV cell decreases from 38.5°C to 31.5°C, and the overall efficiency is approximately 3.8%, basically remain unchanged. 相似文献
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通过在光伏组件的背面连接了一个热电转换模块,形成一个光伏一热电混合模块,从而将光伏组件工作过程中产生的废热转换成电能的同时又降低了光伏组件的温度,进而提高了光电转换效率。将光伏一热电模块与百叶有效结合,从而实现了室内采光、通风及节约空间等多种功能。同时,为了提高光伏组件的入射太阳辐射,引入了可调节的抛物型双面聚焦板,减少了太阳能电池板的面积,从而减少了太阳能发电的成本。 相似文献
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New maximum power point tracker for PV arrays using fuzzy controller in close cooperation with fuzzy cognitive networks 总被引:1,自引:0,他引:1
The studies on the photovoltaic (PV) generation are extensively increasing, since it is considered as an essentially inexhaustible and broadly available energy resource. However, the output power induced in the photovoltaic modules depends on solar radiation and temperature of the solar cells. Therefore, to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the PV array. In this paper, a maximum power point tracker using fuzzy set theory is presented to improve energy conversion efficiency. A new method is proposed, by using a fuzzy cognitive network, which is in close cooperation with the presented fuzzy controller. The new method gives a very good maximum power operation of any PV array under different conditions such as changing insolation and temperature. The simulation studies show the effectiveness of the proposed algorithm. 相似文献
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在太阳能光伏热系统中,光伏电池温度过高会导致太阳能发电效率下降。相变微胶囊悬浮液(MEPCMS)是一种潜热型功能性流体,将其作为冷却介质用于太阳能光伏热系统可以有效降低光伏电池温度,提高系统的能量利用率。针对相变微胶囊易泄露、导热性差等问题提出了改性方法,使其具有光热转换功能并提升了综合性能。基于性能评价指标分析了太阳能光伏热系统性能的影响因素。结果发现,流速、浓度和太阳辐照量是影响MEPCMS在太阳能光伏热系统中换热性能的关键因素。适当增加MEPCMS浓度和流速能提高工质的换热性能,在降低光伏板温度的同时增加太阳辐照量和系统热电产量,但需结合太阳辐照量大小合理匹配工质的浓度和流速。未来研究方向可集中在提升MEPCMS在太阳能光伏热系统中的换热性能、探究运行参数和太阳辐照量之间的匹配关系、优化集热器结构、利用其蓄热性解决太阳能间歇性等方面。 相似文献