Windows and Daylighting Group

U2 - LBNL-48835 ER - TY - RPRT T1 - Solar Heat Gain Through Fenestrations Containing Shading: Procedures for Estimating Performace from Minimal Data Y1 - 2000/ A1 - Joseph H. Klems AB - The computational methods for calculating the properties of glazing systems containing shading from the properties of their components have been developed, but the measurement standards and property data bases necessary to apply them have not. It is shown that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about the shading. Detailed formulas are presented, and performance multipliers are defined for the approximate treatment of simple glazings with shading. As higher accuracy is demanded, the formulas become very complicated. U1 -Windows and Daylighting Group

U2 - LBNL-46682 ER - TY - CONF T1 - Solar Heat Gain Coefficient of Complex Fenestrations with a Venetian Blind for Differing Slat Tilt Angles T2 - ASHRAE Symposium Y1 - 1997/01// A1 - Joseph H. Klems A1 - Jeffrey L. Warner AB - Measured bidirectional transmittances and reflectances of a buff-colored venetian blind together with a layer calculation scheme developed in previous publications are utilized to produce directional-hemispherical properties for the venetian blind layer and solar heat gain coefficients for the blind in combination with clear double glazing. Results are presented for three blind slat tilt angles and for the blind mounted either interior to the double glazing or between the glass panes. Implications of the results for solar heat gain calculations are discussed in the context of sun positions for St. Louis, MO. JF - ASHRAE Symposium CY - Philadelphia, PA VL - 103, Part 1 U1 -Windows and Daylighting Group

U2 - LBNL-39248 ER -