SET Proceedings 2978-4387 Caravel Press 10.65582/set.2005.032 2005.032 Tests and Analysis of Solar-optical Properties of Building Glass ChenZhuolun MengQinglin ZhaoLihua Research Center of Energy Efficiency in Buildings, South China University of Technology, Guangzhou, China 23092005 4 1 978-7-112-07718-2 145 148 23 September 2005 © 2005 Copyright WSSET 2005

Shading coefficient of building glasses is very important to evaluate their energy consumption. It can be calculated out by following ISO 9050 and GB/T 2680-94. This paper describes the experiments and analysis of the solar-optical properties of clear glass, LOW-E glass and PVB laminated glass. These different kinds of building glasses with different thickness are tested by the spectrophotometer. As a result, the values of their reflectance and transmittance in the spectrum range from 300nm to 2500nm are obtained. The solar factors, including total solar energy transmittance and solar direct transmittance, are figured out. Meanwhile, the visible light (380nm~780nm) transmittance and reflectance are considered as their optical property. These values are compared with each other in order to find out the most suitable one to use in hot-summer-warm-winter areas of China. Based on careful analysis, it can be concluded that PVB laminated glass possesses obvious abilities of insulation which would lead to better energy efficiency in practice.

 building glass solar-optical properties solar energy transmittance shading coefficient 23 to 25 September 2005 4th International Conference on Sustainable Energy Technologies SET2005 4 Jinan, China Zhang qin. The design and construction manual of building glass curtain walls and glass sky light roof [M]. Beijing: China building industry publishing company,2002. GB /T2680-94 Determination of light transmittance, solar direct transmittance, total solar energy transmittance for glass in building and related glazing factors,1994. ISO9050 Glass in building — Determination of light transmittance, solar direct transmittance, total solar energy transmittance and ultraviolet transmittance, and related glazing factors,1990. Liu zhongwei, Luo yi. Calculation, design of thermal performance and energy efficiency steps of building glasses, 2003. Dong zizhong, Wang ti, Thermal performance of LOWE glasses, New building materials, 2003.