- Author
-
Gillette, G.
- Title
- Daylighting Model for Building Energy Simulation. Final Report.
- Coporate
- National Bureau of Standards, Washington, DC
- Sponsor
- National Fenestration Council, Topeka, KS
Department of Energy, Washington, DC
- Report
-
NBS BSS 152
March 1983
- Distribution
- Available from National Technical Information Service
- Keywords
-
buildings; illumination; sunlight; daylight; luminance; computerized simulation; computer programs; FORTRAN
|
solar radiation
- Identifiers
- DALITE computer program; FORTRAN 77 programming language
- Abstract
- A computer model is outlined for estimating the annual energy performance of a daylighted building. The daylighting model is a system of FORTRAN subroutines designed for inclusion into larger building energy simulation programs such as DOE-2, BLAST, and NBSLD. Once incorporated into the main energy program, these subroutines will allow the existing program to account for the energy tradeoffs associated with natural illumination. The daylighting model, DALITE, comprises three separate routines to do three separate functions. The first routine generates hourly sky luminances and sky illuminances as well as direct sun illuminance, taking solar radiation and sun position data as input. The second predicts interior daylight illumination at various points within a room due to any number of windows, skylights or clerestories. The last routine adjusts the electric lighting load (via photoelectric controls) in response to the available daylight.