[Bldg-sim] Spectral transmittance of thin film PV window application for EnergyPlus

Lars O. Grobe grobe at gmx.net
Thu Jul 17 04:35:06 PDT 2014

Hi Bill,

I recommend measuring the transmission spectrum of the specific glazing 
you are interested. The measurement could be done using a standard 
spectrometer and an integrating sphere, as long as the wavelength range 
is broad enough (about 300nm to 2000nm should be fine). You do not need 
a fine resolution of the wavelength bands.

This may be of interest:

Color rendering properties of semi-transparent thin-film PV modules

Cheers, Lars.
> Hi all,
> Does anyone have a resource (a completed study, web site, or methodology)
> for understanding the changes to spectral transmittance (and thus solar
> heat gain in spaces) based upon adding transparent thin film PV to a
> window assembly - or guidance for how to model this in EnergyPlus or Open
> Studio? Right now, all we seem to find is very general information about
> transmittance in broad areas of the spectrum, and it doesn't seem good
> enough for modeling in EnergyPlus. Maybe someone has run these through
> LBNL's Window program? Any help would be fantastic.
> Thanks,
> Bill
> Bill Collinge, PhD
> Post-Doctoral Associate
> Swanson School of Engineering
> University of Pittsburgh

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