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Evaluation of optical properties and protection factors of a PDLC switchable glazing for low energy building integration
Solar Energy Materials and Solar Cells ( IF 6.9 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.solmat.2017.10.026
A. Ghosh , T.K. Mallick

Abstract Polymer dispersed liquid crystal (PDLC) glazing is a potential electrically actuated switchable adaptive glazing for low energy building application as it become transparent in the presence of alternating current (AC) power supply and become translucent/opaque without power supply. Optical properties and protection factor for a particular type of PDLC glazing was investigated in this work. Using UV–vis–NIR (1050) spectrophotometer spectral transmittance of this glazing was measured for its both states. PDLC on state needs 20 V AC power supply to offer 41% transmission while without any supply this glazing becomes 23% transparent. In the switch off state LC particles offer forward scattering which makes this glazing translucent with high 82.6% haze. Solar factor for PDLC transparent and translucent state was found to be 0.53 and 0.39 respectively. Glazing protection factors were calculated using spectral transmittance data. Switchable transparency and switchable solar factor makes this glazing suitable to match adaptability of building occupants.

中文翻译:

用于低能耗建筑集成的 PDLC 可切换玻璃的光学性能和保护系数评估

摘要 聚合物分散液晶 (PDLC) 玻璃是一种潜在的电驱动可切换自适应玻璃,用于低能耗建筑应用,因为它在交流 (AC) 电源存在下变得透明,并且在没有电源的情况下变得半透明/不透明。在这项工作中研究了特定类型的 PDLC 玻璃的光学特性和保护系数。使用 UV-vis-NIR (1050) 分光光度计测量该玻璃的两种状态的光谱透射率。状态下的 PDLC 需要 20 V 交流电源来提供 41% 的传输,而在没有任何电源的情况下,这种玻璃的透明度为 23%。在关闭状态下,LC 颗粒提供前向散射,使这种玻璃半透明,雾度高达 82.6%。发现 PDLC 透明和半透明状态的太阳能系数为 0.53 和 0。分别为 39。使用光谱透射率数据计算玻璃保护系数。可切换的透明度和可切换的太阳能系数使这种玻璃适合与建筑物居住者的适应性相匹配。
更新日期:2018-03-01
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