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Michael Collins, Ph.D., P.E., University of Waterloo
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Ned Huang, University of Waterloo
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John Wright, Ph.D., P.E., University of Waterloo
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In recent years, significant advances have been made in modeling fenestration with shading attachments. Most shading devices have great potential for reducing both peak building cooling load and annual energy consumption through the control of solar gains, and the ability to quantify their impact is important. As part of an ASHRAE sponsored research project, several new models were developed for various types of shading devices. One of the most complex of these was the pleated drapery model. This model used off-normal solar-optical fabric properties to predict the off-normal solar-optical properties of the pleated drapery. In doing so, the model assumed that the system could be represented as a series of uniformly arranged rectangular pleats. The presented work aims to validate model performance. A Broad-Area Illumination Integrating Sphere (BAI-IS) was used to perform measurements on a pleated drape sample. Three pleated drape samples composed of fabrics with different transmittance and reflectance were used in measurements. Results were compared to the model output for different pleating shape and incidence angles.
