Thermal Resistance of a Window with an Enclosed Venetian Blind: Guarded Heater Plate Measurements
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Window solar gain is known to have a strong influence on building energy consumption and peak cooling load. Venetian blinds are routinely used to control solar gain. Software based on one-dimensional models is available to accurately predict the thermal performance of glazing systems, but the develop-ment of models for windows with shading devices is at a very early stage. A guarded heater plate apparatus has been used to measure center-glass heat transfer rates through a double-glazed window with a venetian blind in the glazing cavity. Vari-ables examined include pane spacing, temperature difference, slat angle, and the presence of a low-emissivity coating. Results were compared with earlier measurements. The data collected provide direct guidance in the development of models to predict U-factor and solar gain for this type of glazing/shad-ing system, leading to a more structured and quantitative design procedure.
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John L. Wright, Ned Y. T. Huang, Michael R. Collins (2006). Thermal Resistance of a Window with an Enclosed Venetian Blind: Guarded Heater Plate Measurements. UWSpace. http://hdl.handle.net/10012/11573