A Simplified Measurement Method of Solar-Optical Properties of Multi-Pane Glazing Units

Abstract

Energy-efficient windows with double- or triple-pane glazing units are currently widely utilized in building applications. The solar-optical properties of glazing units can greatly affect their energy and daylighting performance. However, it is generally difficult to measure the solar-optical properties of glazings using the current ISO standards, especially for multi-pane units. This paper presents a simplified test method suitable for multi-pane glazing. Three sets of double-pane Low-Emissivity (LOW-E) glazing units were tested under ISO standard and proposed methods. Good agreement between the two testing methods was obtained. However, the simplified method required much less experimental time and labor..

Keywords

• Multi-pane Glazing Units
• Solar-optical Properties
• Total Solar Energy Transmittance
• Shading Coefficient