Spectral Data

Spectral data tab on Panes Dialog.

Solar transmission and reflectance data is entered for a range of wavelengths between 0.1 and 4 microns. This data will generally have been extracted from the IGDB (International Glazing Database) and supplied by DesignBuilder.

The data is arranged in comma-separated table form with a single line per wavelength, each line having 4 columns:

1. Wavelength (microns)
2. Solar transmittance (Tsol)
3. Solar reflectance, front (Rsol1)
4. Solar reflectance, back (Rsol2)

An example is shown in the screenshot below.

Note: due to the large volume of data involved, spectral data is only stored in the Library and not in the model and DesignBuilder uses this Library data in the simulations and display screens. Therefore any changes to the spectral data when a file is open will have no effect.