Arid
DOI10.1117/12.2066328
Optical and adhesive properties of dust deposits on solar mirrors and their effects on specular reflectivity and electrodynamic cleaning for mitigating energy-yield loss
Mazumder, Malay1; Yellowhair, Julius2; Stark, Jeremy1; Heiling, Calvin1; Hudelson, John1; Hao, Fang1; Gibson, Hannah1; Horenstein, Mark1
通讯作者Mazumder, Malay
会议名称Conference on High and Low Concentrator Systems for Solar Energy Applications IX
会议日期AUG 19-20, 2014
会议地点San Diego, CA
英文摘要

Large-scale solar plants are mostly installed in semi-arid and desert areas. In those areas, dust layer buildup on solar collectors becomes a major cause for energy yield loss. Development of transparent electrodynamic screens (EDS) and their applications for self-cleaning operation of solar mirrors are presented with a primary focus on the removal dust particles smaller than 30 mu m in diameter while maintaining specular reflection efficiency > 90%. An EDS consists of thin rectangular array of parallel transparent conducting electrodes deposited on a transparent dielectric surface. The electrodes are insulated from each other and are embedded within a thin transparent dielectric film. The electrodes are activated using three-phase high-voltage pulses at low current (< 1 mA/m(2)). The three-phase electric field charges the deposited particles, lifts them form the substrate by electrostatic forces and propels the dust layer off of the collector's surface by a traveling wave. The cleaning process takes less than 2 minutes; needs energy less than 1 Wh/m(2) without requiring any water or manual labor. The reflection efficiency can be restored > 95% of the original clean-mirror efficiency. We briefly present (1) loss of specular reflection efficiency as a function of particle size distribution of deposited dust, and (2) the effects of the electrode design and materials used for minimizing initial loss of specular reflectivity in producing EDS-integrated solar mirrors. Optimization of EDS by using a figure of merit defined by the ratio of dust removal efficiency to the initial loss of specular reflection efficiency is discussed.


英文关键词CSP dust deposition soiling losses specular reflectivity self-cleaning thermal efficiency
来源出版物HIGH AND LOW CONCENTRATOR SYSTEMS FOR SOLAR ENERGY APPLICATIONS IX
ISSN0277-786X
出版年2014
卷号9175
EISBN978-1-62841-202-4
出版者SPIE-INT SOC OPTICAL ENGINEERING
类型Proceedings Paper
语种英语
国家USA
收录类别CPCI-S
WOS记录号WOS:000348842300014
WOS关键词CALIFORNIA ; SCREEN
WOS类目Energy & Fuels ; Optics
WOS研究方向Energy & Fuels ; Optics
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/303018
作者单位1.Boston Univ, Dept Elect & Comp Engn, 8 St Marys St, Boston, MA 02215 USA;
2.Sandia Natl Labs, Albuquerque, NM 87185 USA
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Mazumder, Malay,Yellowhair, Julius,Stark, Jeremy,et al. Optical and adhesive properties of dust deposits on solar mirrors and their effects on specular reflectivity and electrodynamic cleaning for mitigating energy-yield loss[C]:SPIE-INT SOC OPTICAL ENGINEERING,2014.
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