干旱区生态环境知识资源中心(Arid): The effect of soiling on the reflectance of solar reflector materials - Model for prediction of incidence angle dependent reflectance and attenuation due to dust deposition

Arid

DOI	10.1016/j.solmat.2019.03.015
	The effect of soiling on the reflectance of solar reflector materials - Model for prediction of incidence angle dependent reflectance and attenuation due to dust deposition
	Heimsath, Anna; Nitz, Peter
通讯作者	Heimsath, Anna
来源期刊	SOLAR ENERGY MATERIALS AND SOLAR CELLS
ISSN	0927-0248
EISSN	1879-3398
出版年	2019
卷号	195 页码:258-268
英文摘要	The accumulation of dust and soil on the surface of solar reflectors is an important factor reducing the effective use of solar energy, especially for concentrating solar power plants. In this study, we investigated glass-based mirrors exposed in the desert and mirrors soiled in the laboratory. We achieved artificial, controlled soiling with different soil types by use of an in-house dusting device and measured scattering, hemispherical and specular reflectance. Results showed that small-angle scattering due to dust is noticeable and severely reduces reflectance of mirrors with otherwise high specularity. Prominent result is a significant decrease of reflectance for increasing local solar incidence angles, for example from 0.91 at 8 degrees incidence angle to 0.84 at 70 degrees incidence angle. Therefore, we present a model to predict specular reflectance for different levels of cleanliness. The model applies the Lambert-Beer law and relates the incidence angle dependent attenuation of solar radiation to the dust layer. An application of our model to optical yield prediction indicated a significant relative decrease in predicted annual optical efficiency of up to 1.5% for parabolic trough power plants. In future research, a similar method could be adapted to predict optical losses of photovoltaic modules with flat cover glass.
英文关键词	Solar reflector Reflectance Optical model Dust Soiling
类型	Article
语种	英语
国家	Germany
收录类别	SCI-E
WOS记录号	WOS:000466454600031
WOS关键词	SURFACES
WOS类目	Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied
WOS研究方向	Energy & Fuels ; Materials Science ; Physics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218900
作者单位	Fraunhofer Inst Solar Energy Syst ISE, Heidenhofstr 2, D-79110 Freiburg, Germany
推荐引用方式 GB/T 7714	Heimsath, Anna,Nitz, Peter. The effect of soiling on the reflectance of solar reflector materials - Model for prediction of incidence angle dependent reflectance and attenuation due to dust deposition[J],2019,195:258-268.
APA	Heimsath, Anna,&Nitz, Peter.(2019).The effect of soiling on the reflectance of solar reflector materials - Model for prediction of incidence angle dependent reflectance and attenuation due to dust deposition.SOLAR ENERGY MATERIALS AND SOLAR CELLS,195,258-268.
MLA	Heimsath, Anna,et al."The effect of soiling on the reflectance of solar reflector materials - Model for prediction of incidence angle dependent reflectance and attenuation due to dust deposition".SOLAR ENERGY MATERIALS AND SOLAR CELLS 195(2019):258-268.