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Article: A detailed model to determine the effective solar optical properties of draperies.(Report)
- Article from:
- ASHRAE Transactions
- Article date:
- January 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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INTRODUCTION
Draperies provide privacy, reduce glare, and improve aesthetics. Draperies can also be used to reduce solar gain, peak cooling load, and annual energy consumption. The energy performance for windows with shading devices can be modeled using a two-step procedure. In the first step, solar radiation is considered. This requires the determination of the solar optical properties of each layer in the glazing/shading system. Layers that are not uniform (e.g., shading layers) are assigned spatially averaged, or "effective," solar optical properties. Assigning effective optical properties to a shading layer allows it to be treated as a homogeneous, planar ...