The library includes results of BIMSOL, a project supported by the Swiss Office for Energy under contract # SI/501427-01. Sole responsibility for content and conclusions by the author.
Samples of products available on the market and provided by manufacturers are surveyed using gonio-photometric measurements. Data-driven models with a high directional resolution, which are supported by Radiance accurately replicate selectivity and directionality and can be downloaded for applications that use daylight simulation. It is also possible to produce low-resolution models that are included into the Complex Glazing Database, which is supported by a range of building simulation software.
We encourage interested manufacturers, planners, consultants and researchers to take part in building the Library. Please contact us directly to discuss the possible contributions and terms of collaboration.
Solar shading avoids the effects of overheating in highly insulated buildings. The efficient utilization of daylight can reduce the use of artificial lighting and increase occupant comfort and well-being. In high performance buildings, Complex Fenestration Systems (CFS) are employed to
- control solar irradiation and avoid overheating
- supply daylight evenly to the building interior
- minimize visual discomfort and glare
We develop simulation models of CFS to support planners in the use of these techniques. The models are based on gonio-photometric measurements and accurately replicate transmission properties in the solar spectrum depending on incident and outgoing light direction. In contrast to existing libraries with low directional resolution, our models - as supported by the lighting simulation software Radiance - maintain high resolution adaptive to the particular CFS’s characteristics. Lower resolution variants (e.g. 145 incident and 145 outgoing directions) are derived to provide interfaces to building simulation software such as EnergyPlus.
We encourage manufacturers to submit samples of CFS for inclusion in the library. Sample size in the standard routine measurement is limited to 297mm x 210mm (A4 size) and approx. 500g. Fenestration layers are measured, and should therefore be submitted, separately rather than as part of assemblies. We provide the laboratory infrastructure, but ask manufacturers to cover the cost of labour for the measurement. For details, please contact us.
Measurements are performed on a scanning gonio-photometer at CC EASE. A highly automated measurement process makes high resolution measurements cost effective. Each sample is measured in the range of visible light and in the near infrared. For up to 145 incident directions, the light distributions are recorded at up to 250’000 outgoing directions. Measured data is recorded following the recommendations of ASTM E2387-05.
The advanced interpolation techniques implemented in Radiance are employed to generate models with adaptive resolution. Variants with low directional resolution are prepared according to the standards of the Complex Glazing Database. All models of high and low directional resolution, and measured BSDF data, are distributed through this website.