Determination of total solar and visual radiation transmitted through triple glazing component with PCM layer

8th International Research-Technical Conference on the Problems of Designing, Construction and Use of Low Energy Housing

土木建筑工程

Heim, D.^1 ; Knera, D.^1 ; Krempski-Smejda, M.^1 ; Wieprzkowicz, A.^1

Department of Environmental Engineering, Lodz University of Technology, Wolczanska 213, Lodz

90-924, Poland^1

关键词: External windows;    In-buildings;    Light transmittance;    Liquid state;    Pyranometers;    Solar heat gains;    Transmitted radiation;    Visual transmittances;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/415/1/012041/pdf
DOI  :  10.1088/1757-899X/415/1/012041

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Modification of a glazing unit by application of PCM layer can lead to the increase of the heat capacity of the component and effective control of solar heat gains in buildings. The purpose of this study was to investigate the effect of the PCM layer on total solar and visual transmittance in solid, mushy (transition) and liquid state of PCM. The experiment was conducted in laboratory scale using triple glazed window unit sample and artificial sun as a source of solar radiation. The transmittance (total and visual) was calculated based on the results from pyranometers and illuminance meters taking into account the intensity of solar radiation at the level of 1000 W/m2. Measurements revealed that the component is almost blind in the solid state why in the liquid the transmittance is lower than for empty - traditional triple glazing. The transmitted radiation (total and visible) depends on the location of PCM layer (internal or external window chamber). The registered total solar radiation obtained in solid state was even 0 W/m2 (when material was on the inner side), while the maximum values for liquid was 142 W/m2 (material is located on the outer side). The light transmittance for more transparent case was around 1.6 klx and ten times higher in liquid than solid state.