太阳热反射涂料反射比的测定与计算

Determination and Calculation for the Heat Reflectance of Solar Reflective Coatings

介绍了采用自制简易装置和紫外一可见一近红外分光光度计测定太阳热反射涂料反射比的步骤与计算方法，探讨了各自的优点与存在问题。比较发现：紫外一可见一近红外分光光度计测定太阳热反射涂料反射比精确度高，干扰小；通过350～2100nm波长范围内的加权平均计算，能够得到客观反映太阳热反射涂料对太阳能反射特性的反射比。

The procedures and methods for determining and calculating the heat reflectance of solar reflective coating by a in-house unit and UV - VIS - NIR spectrophotometer were introduced respectively, and the advantages and existing problems of each methods were discussed. By comparing these two detection methods, it shows that the heat reflectance of solar reflective coating, which is determined by UV - VIS - NIR spectrophotometer, has higher accuracy and less interference. The reflectance, which is calculated by weighted average method in the range of wavelength from 350 nm to 2100 nm, can objectively reflect the solar energy reflection property of the solar reflective coatings.