Solar material protection factor (SMPF) and solar skin protection factor (SSPF) for window panes and other glass structures in buildings |
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| Authors: | Bj rn Petter Jelle, Arild Gustavsen, Tom Nils Nilsen,Terje Jacobsen |
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| Affiliation: | aDepartment of Materials and Structures, Norwegian Building Research Institute, NO 7491 Trondheim, Norway;bDepartment of Civil and Transport Engineering, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway;cDepartment of Chemical Engineering, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway |
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| Abstract: | The two quantities solar material protection factor (SMPF) and solar skin protection factor (SSPF) are introduced in order to measure and calculate the capability of glass to protect indoor materials and human skin from degradation caused by the solar radiation. Comparison of the SMPF and SSPF values for different glass fabrications enables one to select the most appropriate glass material for the specific buildings. Numerical examples are shown with measurements and calculations carried out on various glass materials, including two electrochromic window (ECW) devices, and several two- and three-layer window pane combinations. Visibility levels at various protection degrees are also given. |
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| Keywords: | Material Skin Protection factor Window pane Glass Building Solar radiation Ultraviolet light Visible light |
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