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Thermal Analysis of Water Droplets on PV Panel Surfaces

机译:光伏面板表面水滴的热分析

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摘要

Due to the increasing energy costs and concern on carbon footprint, renewable energy technologies have become more important. Especially after the COP21 Paris meeting, increase in implementation of renewable energy systems has been an important agenda item of countries globally. Among these renewable technologies, solar energy is one of the key players. Hence research on photovoltaic (PV) panels has become more important.;This study investigates the heat transfer effect of water droplets on the panel surface. As surface temperature variation plays a significant role in the efficiency of the solar panel, understanding the heat transfer phenomena between the droplet and the panel is crucial. Temperature variation around the droplet-panel interface was studied both theoretically and numerically. Different cases were studied considering droplet volume, number of droplets, and the distance between the droplets. This research concludes that droplet retention on PV panel surface after a rain, condensation or irrigation event is observed when the drag force dominates the body forces. Amount of heat transfer increases with increasing droplet volume and contact area. Hence more heat transfer is observed over hydrophilic surfaces then hydrophobic surfaces. As the number of droplets over the PV panel surface increase, cell temperature decreases which would yield panel efficiency. It was observed that as the distance between the droplets increases, cooling effect lessens. This decrease in the cooling effect would get higher as the droplets get further away from each other.
机译:由于能源成本增加和对碳足迹的关注,可再生能源技术变得越来越重要。特别是在COP21巴黎会议之后,增加可再生能源系统的实施已成为全球各国的重要议程项目。在这些可再生技术中,太阳能是关键角色之一。因此,对光伏(PV)面板的研究变得越来越重要。;本研究调查了水滴在面板表面上的传热效果。由于表面温度变化在太阳能电池板的效率中起着重要作用,因此了解液滴与电池板之间的传热现象至关重要。从理论和数值两方面研究了液滴-面板界面周围的温度变化。研究了不同的情况,考虑了液滴体积,液滴数量以及液滴之间的距离。这项研究得出的结论是,在雨水,冷凝水或灌溉事件发生后,当阻力主要作用于车身力时,会观察到水滴在光伏面板表面的残留。传热量随着液滴体积和接触面积的增加而增加。因此,在亲水性表面上比在疏水性表面上观察到更多的热传递。随着PV面板表面上的液滴数量增加,电池温度降低,这将产生面板效率。观察到,随着液滴之间的距离增加,冷却效果减弱。随着液滴彼此进一步远离,冷却效果的这种降低将变得更高。

著录项

  • 作者

    Shah, Keyur.;

  • 作者单位

    Southern Illinois University at Edwardsville.;

  • 授予单位 Southern Illinois University at Edwardsville.;
  • 学科 Mechanical engineering.;Engineering.
  • 学位 M.S.
  • 年度 2018
  • 页码 68 p.
  • 总页数 68
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 世界各国经济概况、经济史、经济地理;
  • 关键词

  • 入库时间 2022-08-17 11:41:25

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