一种建筑节能涂料反射特性的实验研究.pdf

30 2 Vol. 30, No. 2 20 10 2 ACTA OPTICA SI NI CA February , 2010 : 0253-2239( 2010) 02-0480-05 一种建筑节能涂料反射特性的实验研究 邹捷书 朱群志 李永光 司磊磊 穆丽娟 ( , 200090) , , , 635 nm 980 nm ( BRDF) , , , , , , 635 nm 980 nm , 83% 75% ; ; ; O436. 2 A doi: 10. 3788/ AOS20 103002. 0480 Experimental Study of the Reflectance for Architectural Energy Saving Coatings Zou Jieshu Zhu Qunzhi Li Yongguang Si Lei ei Mu L ijuan ( S hool of En ergy Sour es and Environm ent En gin eerin g , Shan ghai Un iversity of Ele tr i Pow er , Shan ghai 200090, China ) Abstract The use of so ar ref ective coatings on the bui ding enve ope can reduce the energy consumed by the air conditioner and provide a t herma y comfortab e indoor env ironment. Performance of the energy sav ing coating is c ose y re ated to its ref ectance. The higher ref ectance in the so ar spectrum, the more energy cou d be saved. The effects of wave ength, incident ang e and thickness of the coatings on ref ectance are investigated based on the measurement resu ts. The bidirectiona ref ectance distribution functions ( BRDF) at visib e wav e ength 635 nm and near-infrared wave ength 980 nm are measured and the effects of coating thickness on the norma-hemispherica ref ectance which is ca cu ated from the measured BRDFs are discussed. The resu ts show that there is a remarkab e peak at the specu ar direction in the BRDFs. The peak va ue becomes high as the incident ang e and wave ength increase. The thickness has insignific