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optical properties of glass/ films

asked 2016-04-05 09:05:05 -0500

Mroy's avatar

updated 2016-04-06 11:13:57 -0500

Does anybody know if EnergyPlus uses full (or partial) spectral properties of translucent materials and glass to calculate solar transmission (and associated gains)? Attached C:\fakepath\Spectral properties of polycarbonate.png for instance is the transmission of a poly-carbonate surface that I am modelling as a function of varying wavelength. I noticed that DesignBuilder (that I use as graphical interface) allows me to edit a fairly detailed spectral data library for fabric opening materials, and I am wondering if this gets used in E+ for simulations, as opposed to only static figures that asign a single value to infra-red, solar and visible properties of glass, films and polymers? Thanks a lot Roy

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Please tag your question with the software/engine you're asking about.

ericringold's avatar ericringold  ( 2016-04-05 09:58:27 -0500 )edit

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answered 2016-04-05 09:51:30 -0500

Check out the inputs to the WindowMaterial:Glazing and the EnergyPlus Engineering Reference description of the Window Calculation Module. DesignBuilder uses EnergyPlus as the simulation engine, so the spectral data you're inputting is likely being used for complex fenestration calculations in EnergyPlus.

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Thanks a lot Eric. E+ can actually use the full spectral properties (outlined in Glazing System Properties - Window calculation model). M

Mroy's avatar Mroy  ( 2016-04-11 10:01:11 -0500 )edit

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Asked: 2016-04-05 09:05:05 -0500

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Last updated: Apr 05 '16