Computer shadow analysis technique for tilted windows shaded by overhangs, vertical projections, and side fins

Journal Article · Sat Jan 01 04:00:00 EST 1983 · ASHRAE Trans.; (United States)

OSTI ID:5279548

Bekooy, R G

This paper expands upon previously published techniques for calculating window shadow areas by computer to include tilted and horizontal glazing systems as well as vertical glazing systems. This methodology may be used for any rectangular window shaded by rectangular overhangs and/or side fins perpendicular to the plane of the window. Rectangular projections suspended from the end of an overhang are also accommodated. The technique yields a precise solution and requires minimum input. Computer processing is rapid because iterative algorithms are avoided. Shadow overlaps and end effects are completely treated. The glazing system may have any degree of tilt from horizontal (looking upward) through vertical to horizontal (looking downward). Techniques for sorting window shadow shapes and equations for calculating shadow areas are included.

• Research Organization: Carson, Bekooy, Gulick and Associates Inc., Portland, OR
• OSTI ID: 5279548
• Journal Information: ASHRAE Trans.; (United States), Journal Name: ASHRAE Trans.; (United States) Vol. 89:1A; ISSN ASHTA
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
36 MATERIALS SCIENCE
360600 -- Other Materials
COMPUTER CALCULATIONS
CONFIGURATION
COVERINGS
EQUATIONS
FINS
GLAZING MATERIALS
INCLINATION
MATERIALS
OPENINGS
RECTANGULAR CONFIGURATION
SHADING
SHAPE
WINDOWS