Simulating the daylight performance of fenestration systems and spaces of arbitrary complexity: The IDC method. Revision
A new method to simulate the daylight performance of fenestration systems and spaces is presented. This new method, named IDC (Integration of Directional Coefficients), allows the simulation of the daylight performance of fenestration systems and spaces of arbitrary complexity, under any sun, sky and ground conditions. The IDC method is based on the combination of scale model photometry and computer-based simulation. Physical scale models are used to experimentally determine a comprehensive set of {open_quotes}directional illuminance coefficients{close_quotes} at reference points of interest, which are then used in analytical, computer-based routines, to determine daylight factors or actual daylight illuminance values under any sun, sky and ground conditions. The main advantage of the IDC method is its applicability to any optically complex environment. Moreover, the computer-based analytical routines are fast enough to allow for hourly simulation of the daylight performance over the course of an entire year. However, the method requires appropriate experimental facilities for the determination of the Directional Coefficients. The IDC method has been implemented and used successfully in inter-validation procedures with various daylight simulation computer programs. Currently, it is used to simulate the daylight performance of fenestration systems that incorporate optically complex components, such as Venetian blinds, optically treated light shelves and light pipes.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); California Inst. for Energy Efficiency, Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10192493
- Report Number(s):
- LBL-33945-Rev.; CONF-9308111-1-Rev.; ON: DE94002284; IN: DA-305; TRN: 93:004502
- Resource Relation:
- Conference: 3. international conference of the International Building Performance Simulation Association,Adelaide (Australia),16-18 Aug 1993; Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DAYLIGHTING
COMPUTERIZED SIMULATION
SCALE MODELS
LIGHTING SYSTEMS
PERFORMANCE TESTING
PHOTOMETRY
ILLUMINANCE
WINDOWS
320106
990200
BUILDING EQUIPMENT
MATHEMATICS AND COMPUTERS