Experimental study of the reflectance for architectural energy saving coatings

被引：0
|
作者：
Zou J. [1 ]
Zhu Q. [1 ]
Li Y. [1 ]
Si L. [1 ]
Mu L. [1 ]
机构：
[1] School of Energy Sources and Environment Engineering, Shanghai University of Electric Power
来源：
Guangxue Xuebao/Acta Optica Sinica | 2010年 / 30卷 / 02期
关键词：
Bidirectional reflectance; Normal-hemispherical reflectance; Scattering; Solar reflective coatings;
D O I：
10.3788/AOS20103002.0480
中图分类号：
学科分类号：
摘要：
The use of solar reflective coatings on the building envelope can reduce the energy consumed by the air conditioner and provide a thermally comfortable indoor environment. Performance of the energy saving coating is closely related to its reflectance. The higher reflectance in the solar spectrum, the more energy could be saved. The effects of wavelength, incident angle and thickness of the coatings on reflectance are investigated based on the measurement results. The bidirectional reflectance distribution functions (BRDF) at visible wavelength 635 nm and near-infrared wavelength 980 nm are measured and the effects of coating thickness on the normal-hemispherical reflectance which is calculated from the measured BRDFs are discussed. The results show that there is a remarkable peak at the specular direction in the BRDFs. The peak value becomes high as the incident angle and wavelength increase. The thickness has insignificant influence on the normal-hemispherical reflectance, which is 83% at 635 nm and 75% at 980 nm, respectively.
引用
收藏
页码：480 / 484
页数：4
相关论文
共 16 条
  • [1] Akbari H., Measured energy savings from the application of reflective roofs in two small non-residential buildings, Energy, 28, 9, pp. 953-967, (2003)
  • [2] Chen Z., Jiang J., Zhang G., Et al., Preparation of thermal insulation architectural coating with compound mechanism, Acta Energize Solaris Sinica, 29, 3, pp. 257-262, (2008)
  • [3] Synnefa A., Santamouris M., Apostolakis K., On the development, optical properties and thermal performance of cool colored coatings for the urban environment, Solar Energy, 81, 4, pp. 488-497, (2007)
  • [4] Wang X., Kendrick C., Ogden R., Et al., Dynamic thermal simulation of a retail shed with solar reflective coatings, Applied Thermal Engineering, 28, 8-9, pp. 1066-1073, (2008)
  • [5] Guo N., Chen X., Chen S., Et al., Solar heat reflective coatings, Paint & Coatings Industry, 29, 4, pp. 73-75, (1999)
  • [6] Lu H., Chen J., Feng C., Et al., Determination and calculation for the heat reflectance of solar reflective coatings, Paint & Coatings Industry, 38, 7, pp. 46-49, (2008)
  • [7] van Nijnatten P.A., An automated directional reflectance/transmittance analyser for coating analysis, Thin Solid Films, 442, 1-2, pp. 74-79, (2003)
  • [8] Zhang L., Yang Y., Zang H., Et al., Reflective characteristics of target in laser rangefinder, Chinese J. Lasers, 35, 7, pp. 1001-1004, (2008)
  • [9] Cao Y., Wu Z., Zhang H., Et al., Experimental measurement and statistical modeling of spectral bidirectional reflectance distribution function of rough target samples, Acta Optica Sinica, 28, 4, pp. 792-798, (2008)
  • [10] Feng W., Wei Q., Wang S., Et al., Study of polarized bidirectional reflectance distribution function model for painted surfaces, Acta Optica Sinica, 28, 2, pp. 290-294, (2008)
12