平板玻璃的透射率、反射率和发射率测量以及使用UV-Vis/NIR分光光度计评估太阳热增益系数

许多隔热玻璃都是由环保材料制成的，可以防止全球变暖并降低能源成本。JIS R3016规定了用于评估这些隔热玻璃的测试方法，并要求测量可见光透射率、可见光反射率、太阳光透射率、太阳光反射率和发射率。根据这些测量结果，可以计算出太阳热增益系数，该系数被定义为通过窗口入射的太阳辐射的分数。Application Note Transmittance， Reflectance， and Emittance Measurements of Flat Glasses and theEvaluation of Solar Heat Gain Coefficient using a UV-Vis/NIR Spectrophotometer2/2 UV-0020 Transmittance， Reflectance， and Emittance Measurements of Flat Glasses and the Evaluation of Solar Heat Gain Coefficient using a UV-Vis/NIR Spectrophotomete r In t roduc t ion Many heat s h ie l d g l asses are made eco-friend l y materi a ls that prevent global warm i ng and r educe energy costs. Testing methods for the eva l uat i on of these heat s h ie l d glasses i s st i pu l ated by JIS R3016 and requ ir e visible tr ansmittance，visible reflectance， so l a r transmittance， solar ref l ectance， a n d emittance measureme n ts. F r om these meas u rements， the solar heat gain coef f icient can be calculated， which is defined as t h e fract i on o f incident solar radiat i on adm it ted th r o u gh a window. V-630 UV-V i s S p ect r op h otometer This application note i l l ustrates how to obtai n and evaluate transmittance/reflecta n ce spect r a of a flat g l asses using an integrat i ng sphere and calculate the sola r r adiat i on absorbance u sing the Solar Transmittance/Reflectance Visible Light Transmittance/Reflectance program . K eywords V-670，UV-Visi b le/NIR， ISN-723 I n tegrating s p here， VWST -774 Solar T r ansmitta n ce/Ref l ect a nce Visible L ight Transmittance/ Exp e r i m e ntal Measurement Conditions Measurement Range 2500-300nm Data Pitch 0.5 nm UV/Vis Bandwidth 5.0nm NIR Bandwidth 20.0nm Scan Speed 400 nm/min Response Fast 28600 Ma r y 's C ou r t， Easton， M D 21601 US A Appl i cat i on Note Resul t s Spectra of both h eat sh i eld glass a n d conventional g l ass were measured and are s h own i n F i gure 1. Figure 1. T r a n smitta n ce (l eft) and re f lectance (r i g h t) s p ect r a of h ea t s h ie l d glass (green ) a n d co n vent i onal glass (blue). The solar radiation res u lts of t h e h eat shield and convent i onal glass were calcu l ated using t he Solar Transmittance/Reflectance Visible Light Transmittance/Reflectance p rogram and a r e shown i n Figure 2 a n d T able 1. Figure 2. Solar Transmittance/Reflectance Visible Light Transmi t tance/Reflectance p r og r am. Table 1. Solar rad i ation t r ans m i t ta n ce/r ef l ectance/abso r ban c e a n d visi b le l ight t ra n s m itta n ce/reflecta n ce results of heat shield and conventional glass. Conventional Glass % 41.89 86.10 31.85 7.82 6.08 Visible Light Transmittance 76.38 89.95 Visible Light Reflectance 8.80 8.52 28600 Mary's Cour t ， E a s to n ， M D 21601US A