Dust Removal from Solar PV Modules by Automated Cleaning Systems
Dust Removal from Solar PV Modules by Automated Cleaning Systems
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DOI：
10.3390/en12152923
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发表时间：
2019-08-01
期刊：
影响因子：
3.2
通讯作者：
Wu, Yue
中科院分区：
文献类型：
--
作者：
Alghamdi, Abdulsalam S.;Bahaj, AbuBakr S.;Wu, Yue
太阳能光伏（PV）模块上的灰尘积累减少了从外表面到太阳能电池的光透射，减少了光子吸收，从而导致PV系统的性能降低。在中东等地区，沙尘盛行，降雨稀少，需要采取补救措施来减少这种影响。目前，正在采用各种技术来解决这种沙子污染问题，从机械（刷洗）到主动和被动电气干预。这项研究的重点是机械方法，包括模块振动，空气和水射流，以及这些组合。在沙特阿拉伯吉达阿卜杜勒阿齐兹国王大学（KAU）校园内的车棚遮阳系统上安装了一个8 kWp光伏电站的可重构中试试验台。功能性PV车库被配置为允许在试验台内进行水回收和再利用。在这里，我们讨论整体清洁设计理念和方法，系统设计，以及如何在整个光伏车库内实现多种清洁配置。结果表明，在这个位置，砂污染有一个显着的影响光伏组件的性能上的时间尺度天。此外，针对高容量和低压力优化的水射流在减少砂污染方面有效，阵列功率输出增加超过27%，而空气射流和模块振动在将污染减少到可接受水平方面效果较差。总的来说，该试验台提供了一种新的方法来测试现场清洁解决方案的组合，以及用过的水回收。拟议的方法很重要，因为目前沙特阿拉伯正在建设大量太阳能光伏项目，未来计划建设更多项目。
Dust accumulation on solar photovoltaic (PV) modules reduces light transmission from the outer surfaces to the solar cells reducing photon absorption and thus contributing to performance reduction of PV systems. In regions such as the Middle East where dust is prevalent and rainfall is scarce, remedial measures are needed to reduce such impacts. Currently, various techniques are being employed to address such sand soiling ranging from mechanical (brushing) to active and passive electrical interventions. This research focuses on mechanical approaches encompassing module vibration, air and water jets, and combinations of these. A reconfigurable pilot-scale testbed of 8 kWp PV plant was installed on a carport shading system within the campus of King Abdulaziz University (KAU), Jeddah, Saudi Arabia. The functional PV carport was configured to allow water recovery and re-use within the testbed. Here, we discuss the overall cleaning design philosophy and approach, systems design, and how multiple cleaning configurations can be realised within the overall PV carport. Results indicate that in this location, sand soiling has a significant effect on performance of PV modules on a timescale of days. In addition, water jets optimised for high volume and low pressure were effective at reducing sand soiling with array power output increasing by over 27%, whilst air jets and module vibration were less effective in reducing soiling to an acceptable level. Overall, the testbed has provided a new approach to testing a combination of cleaning solutions in the field coupled with used water recovery. The proposed approach is important, as currently, there are a large number of solar PV projects being built in Saudi Arabia with more being planned for the future.