Experimental and numerical study on non-concentrating and symmetric unglazed compound parabolic photovoltaic concentration systems
Experimental and numerical study on non-concentrating and symmetric unglazed compound parabolic photovoltaic concentration systems
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DOI：
10.1016/j.apenergy.2014.09.060
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发表时间：
2014-12-31
期刊：
影响因子：
11.2
通讯作者：
Rehman, Shafiqur
中科院分区：
文献类型：
--
作者：
Bahaidarah, Haitham M.;Tanweer, Bilal;Rehman, Shafiqur
本文对平板光伏（PV）串式光伏系统和对称复合抛物面聚光器（CPC）光伏系统进行了比较研究。考虑两个扁平光伏串和两个无釉 PV-CPC 系统。每个扁平PV和PV-CPC串的电池都经过冷却以降低温度。通过数值和实验评估了带冷却和不带冷却的两种配置的性能。使用工程方程求解器（EES）软件求解扁平光伏组串和PV-CPC系统的数值模型，并且CPC系统的聚光比被认为是2.3X。 PV-CPC 和平板光伏系统吸收的能量是在有冷却和无冷却的情况下计算的。吸收的能量用于求解系统不同节点上的能量平衡方程，从而确定电池温度。结果表明，带冷却的扁平光伏组串的最大功率输出约为 21 W，比不带冷却的功率高出约 49%。带冷却的PV-CPC系统的最大功率输出约为34W，大约是不带冷却的情况下获得的功率的两倍。结果发现，PV-CPC系统的功率输出比带冷却和不带冷却的扁平光伏组串的功率输出分别高39%和23%。数值结果与实验数据的比较显示两种配置具有良好的一致性。带冷却和不带冷却的平板光伏的数值功率输出与实验功率输出之间的最大百分比差异分别为 5% 和 7%。而带冷却和不带冷却的PV-CPC系统分别为9%和11%。 (C) 2014 Elsevier Ltd. 保留所有权利。
Comparative study on flat photovoltaic (PV) string and symmetric compound parabolic concentrator (CPC) photovoltaic system has been presented in this paper. Two flat PV strings and two unglazed PV-CPC systems are considered. The cells of each of the flat PV and PV-CPC strings are subjected to cooling to reduce temperature. The performance of the two configurations with and without cooling is evaluated numerically and experimentally. The numerical models for the flat PV string and the PV-CPC systems are solved using Engineering Equation Solver (EES) software and the concentration ratio of the CPC system is considered as 2.3X. Absorbed energy is calculated with and without cooling for the PV-CPC and flat PV systems. The absorbed energy is used to solve the energy balance equations on different nodes of the system from which the cell temperature was determined. The results showed that the maximum power output of the flat PV string with cooling was approximately 21 W which gives about 49% more than the power obtained without cooling. The maximum power output of the PV-CPC system with cooling was approximately 34W which is about twice of the power obtained in the absence of cooling. It was found that the power output of the PV-CPC system is higher than that of the flat PV string with and without cooling by 39% and 23% respectively. Comparison of the numerical results with experimental data showed good agreement for the two configurations. The maximum percentage differences between the numerical and experimental power output for the flat PV with and without cooling are 5% and 7%, respectively. While those of the PV-CPC system with and without cooling are 9% and 11%, respectively. (C) 2014 Elsevier Ltd. All rights reserved.