Effect of dust on the transparent cover of solar collectors
Effect of dust on the transparent cover of solar collectors
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DOI：
10.1016/j.enconman.2006.02.014
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发表时间：
2006-11-01
影响因子：
10.4
通讯作者：
Abdel-Moneim, Khaled M.
中科院分区：
文献类型：
--
作者：
Elminir, Hamdy K.;Ghitas, Ahmed E.;Abdel-Moneim, Khaled M.
光伏（PV）系统的研究和开发通常集中在辐射可用性，有效的操作策略，这些系统的设计和规模的研究。另一方面，灰尘对光伏系统性能的影响还没有得到足够的重视。本文所述的工作大大有助于克服这一缺陷。为了验证这一概念，我们开发了一个实验装置，涉及100个具有不同倾斜角（β）和方位角（γ）的玻璃样品。在大约7个月的时间内以及在周围地区的每次雷暴之后，定期对玻璃的透射率进行评估。虽然这只是一个短期的观点，但初步结果表明，玻璃法向透射率的降低强烈地取决于灰尘沉积密度和板倾斜角度，以及表面相对于主导风向的取向。考虑到这一点，可以看出，随着粉尘沉积密度从15.84 g/m（2）（对于以0度的倾斜角安装的玻璃样品）到4.48g/m2（对于以90度的倾斜角安装并且取向为与北方偏离135度），相应的透射率分别减小约52.54- 12.38%。还研究了输出功率随电池污染程度的变化规律。已经发现，通过以面向南的45度角安装的太阳能电池的数据点的最佳直线的斜率表明输出功率每月减少约17.4%。(c)2006爱思唯尔有限公司保留所有权利。
Research and development in photovoltaic (PV) systems has usually been concentrated in studies on radiation availability, efficient operating strategies, design and sizing of these systems. On the other hand, the influence of dust on the performance of PV systems has not been given much attention. The work described here contributes considerably to overcome this deficit. To validate the concept, we have developed an experimental set up involving 100 glass samples with different tilt (beta) and azimuth angles (gamma). The transmittance of the glass was evaluated at regular intervals over a period of about seven months and after every thunderstorm in the surrounding area.Although it is only a short term view, the preliminary results indicate that the reduction in glass normal transmittance depends strongly on the dust deposition density in conjunction with plate tilt angle, as well as on the orientation of the surface with respect to the dominant wind direction. With this consideration, one sees that as the dust deposition density goes from 15.84 g/m(2) (for glass sample installed at a tilt angle of 0 degrees) to 4.48 g/m(2) (for glass sample installed at a tilt angle of 90 degrees and oriented with 135 degrees deviation from north), the corresponding transmittance diminishes by approximately 52.54-12.38%, respectively. The evolutions of the output power variation with increasing cell pollution were also examined. It has been found that the slope of the best straight line passing through the data points of the solar cell installed at a 45 degrees angle facing south suggests a decrease in the output power of about 17.4% per month. (c) 2006 Elsevier Ltd. All rights reserved.