Modeling PVs

Hello Everyone,

Could anyone recommend how to best model a monocrystalline PV panel in Radiance? Also, does anyone have assumed or actual reflectance and transmittance properties from prior experience as I do not have ability/time to measure the properties myself?

Thanks,
Kyle

Kyle E. Houser

EwingCole

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Dear Kyle,

such PV panels are not easy to model. The reflected light that you are probably interested in is mainly the light reflected from the front-glazing. Glass panes used for PV panels are typically structured with pyramids, smooth structures and such. So without knowing the reflective properties of the frontglazing, modeling the panel will be try and error. The built-in material models are probably not approximating the reflective behaviour of the panel at all.

Cheers,
Lars.

Dear Kyle,

We did some reflective modeling of a PV array causing glare at an airport where such models were very important. There was no possibility of a goniophotometer measurement, so we settled with using a portable spectrophotometer to get total reflectance and HDR photography to approximate the range of 'specular spread' depending on the angle of the sun. Its definitely not perfect, but worked well for the study. You can read more from the link at the front of this paragraph.

Best,
Alstan

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On Sat, 07 Jun 2014 08:19:16 -0400, Lars O. Grobe <[email protected]> wrote:

Dear Kyle,

such PV panels are not easy to model. The reflected light that you are probably interested in is mainly the light reflected from the front-glazing. Glass >panes used for PV panels are typically structured with pyramids, smooth structures and such. So without knowing the reflective properties of the >frontglazing, modeling the panel will be try and error. The built-in material models are probably not approximating the reflective behaviour of the >panel at all.

Cheers,
Lars.