建筑玻璃.光透率、日光直射率、太阳能总透射率及紫外线透射率及有关光泽系数的测定

[中文适用范围]： 本国际标准规定了测定建筑物玻璃窗的光和太阳辐射能量透射率的方法。 这些特征数据可以作为房间的光、供暖和通风计算的基础，并且可以对不同类型的玻璃进行比较。 本国际标准既适用于传统的玻璃窗单元，也适用于用作玻璃窗的吸收或反射阳光控制玻璃窗。 给出了单层、双层和三层玻璃的适当公式。 此外，还建立了由多个组件组成的单元的通用计算程序。 本国际标准适用于所有透明材料。 一个例外是对那些在环境温度辐射波长范围（5 μm 至 50 μm）内表现出显着透射率的材料（例如某些塑料片）的二次传热系数和总太阳能系数的处理。 注：对于包含具有光散射特性的元件的多层玻璃，可以使用 ISO 15099 的更详细程序。 对于采光计算，程序可以在参考文献[1]中找到。 [外文原描述]： ISO 9050:2003 specifies methods of determining light and energy transmittance of solar radiation for glazing in buildings. These characteristic data can serve as a basis for light, heating and ventilation calculations of rooms and can permit comparison between different types of glazing. ISO 9050:2003 is applicable both to conventional glazing units and to absorbing or reflecting solar-control glazing, used as glazed apertures. The appropriate formulae for single, double and triple glazing are given. Furthermore, the general calculation procedures for units consisting of more than components are established. ISO 9050:2003 is applicable to all transparent materials. One exception is the treatment of the secondary heat transfer factor and the total solar energy factor for those materials that show significant transmittance in the wavelength region of ambient temperature radiation (5 microns to 50 microns), such as certain plastic sheets.