中空玻璃太阳得热系数和可见光透射比计算

Calculation for Solar Heat Gain Coefficient and Visible Light Transmittance of Insulated Glass

太阳得热系数和可见光透射比是评价中空玻璃隔热性能、采光性能的重要指标。JGJ/T 151—2008《建筑门窗玻璃幕墙热工计算规程》中给出了基于太阳辐射照度的太阳得热系数和可见光透射比计算方法,在此基础上提出了基于单片玻璃光热参数的太阳得热系数和可见光透射比计算方法;采用基于单片玻璃光热参数的计算方法、基于太阳辐射照度的计算方法、软件MQMC计算和实测验证对结果进行了对比,证明了基于单片玻璃光热参数的中空玻璃太阳得热系数和可见光透射比计算方法的可靠性。该方法对于中空玻璃光热性能评价、相关工具开发和建筑节能工作的推进具有重要意义。

The solar heat gain coefficient and visible light transmittance are important indicators for evaluating the insulation and lighting performance of insulating glass.Calculation Specification for Thermal Performance of Windows,Doors and Glass Curtain-Walls(JGJ/T 151—2008)provides a calculation method for solar heat gain coefficient and visible light transmittance based on solar irradiance.A calculation method for solar heat gain coefficient and visible light transmittance based on single glass photothermal parameters is proposed;The results are compared and verified using a calculation method based on the photothermal parameters of a single piece of glass,a calculation method based on solar irradiance,mainstream calculation software MQMC calculation method,and actual measurement verification method.The high accuracy proved the reliability of the calculation method for the solar heat gain coefficient and visible light transmittance of insulating glass based on the photothermal parameters of a single piece of glass.This method is of great significance for the evaluation of the photothermal performance of insulating glass,the development of related tools,and the promotion of building energy conservation.