Arid
DOI10.1063/1.4949219
Specular Reflectance of Soiled Glass Mirrors - Study on the Impact of Incidence Angles
Heimsath, Anna1; Lindner, Philip1; Klimm, Elisabeth1; Schmid, Tobias1; Moreno, Karolina Ordonez1; Elon, Yehonatan2; Am-Shallem, Morag2; Nitz, Peter1
通讯作者Heimsath, Anna
会议名称21st International Conference on Concentrating Solar Power and Chemical Energy Systems (SolarPACES)
会议日期OCT 13-16, 2015
会议地点Cape Town, SOUTH AFRICA
英文摘要

The accumulation of dust and soil on the surface of solar reflectors is an important factor reducing the power output of solar power plants. Therefore the effect of accumulated dust on the specular reflectance of solar mirrors should be understood well in order to improve the site-dependent performance prediction. Furthermore, an optimization of the CSP System maintenance, in particular the cleaning cycles, can be achieved. Our measurements show a noticeable decrease of specular reflectance when the angle of incidence is increased. This effect may be explained by shading and blocking mechanisms caused by dirt particles. The main physical causes of radiation loss being absorption and scattering, the near-angle scattering leads to a further decrease of specular reflectance for smaller angles of acceptance. Within this study mirror samples were both outdoor exposed and indoor artificially soiled. For indoor soiling, the mirror samples were artificially soiled in an in-house developed dusting device using both artificial-standardized dust and real dust collected from an arid outdoor test field at the Negev desert. A model function is proposed that approximates the observed reduction of specular reflectance with the incidence angle with a sufficient accuracy and by simple means for this soil type. Hence a first step towards a new approach to improve site dependent performance prediction of solar power plants is taken.


来源出版物SOLARPACES 2015: INTERNATIONAL CONFERENCE ON CONCENTRATING SOLAR POWER AND CHEMICAL ENERGY SYSTEMS
ISSN0094-243X
出版年2016
卷号1734
EISBN978-0-7354-1386-3
出版者AMER INST PHYSICS
类型Proceedings Paper
语种英语
国家Germany;Israel
收录类别CPCI-S
WOS记录号WOS:000380374600194
WOS类目Energy & Fuels ; Physics, Applied
WOS研究方向Energy & Fuels ; Physics
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/304941
作者单位1.Fraunhofer Inst Solar Energy Syst ISE, Heidenhofstr 2, D-79110 Freiburg, Germany;
2.BrightSource Energy, Jerusalem, Israel
推荐引用方式
GB/T 7714
Heimsath, Anna,Lindner, Philip,Klimm, Elisabeth,et al. Specular Reflectance of Soiled Glass Mirrors - Study on the Impact of Incidence Angles[C]:AMER INST PHYSICS,2016.
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