heliodon


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heliodon

A device used to orient a light source (representing the sun) with respect to an architectural model; calibrated in terms of latitude, time of day, and season of the year; used to study daylighting techniques and to illustrate the shadows cast by direct sunlight.
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Figures 1a and 1b and 2a and 2b show the south wall of the house at noon during the winter (21 December) and summer (June 21) solstices of the house model on the heliodon and the actual house, respectively.
uses a fixed-sun, moving-Earth arrangement for its heliodon.
The heliodon swivels in three directions for setting latitude, season, and time of day.
We try to make the heliodon experience as realistic as possible," said Ryan Stroupe, who coordinates the Whole Building Performance program for the center.
Over the nearly 10 years that the heliodon has operated at the Energy Center, hundreds of clients have used it, Stroupe said.
A more recent installation at the Welsh School of Architecture at Cardiff University adds to its heliodon an array of lamps to recreate the illumination level of a cloudy sky.
For the solar panel study, the designers placed the larger model under the heliodon alone.
Unlike Pacific Energy's heliodon, the university's Skydome moves both Earth and sun.
In that its output is highly visual, Radiance, among the lab's software collection, is the program that most closely simulates a heliodon.
still spends half a day with the heliodon at Pacific Energy Center for just about every project he works on.
Specializing in green designs, Jersey said that the heliodon has taught his firm a great deal about orienting overhangs and windows to control shade and sun.
Heliodons are powerful tools for demonstrating the potential and logic of solar design to people of any age or education level.