Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2066328 |
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 |
ISSN | 0277-786X |
出版年 | 2014 |
卷号 | 9175 |
EISBN | 978-1-62841-202-4 |
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 |
推荐引用方式 GB/T 7714 | 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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