[Bldg-sim] eQuest Modeling of Film on top of Glass

[Dahlstrom, Aaron]

John et al -

Agree Alex has a good procedure for picking up the angular dependence.

As a "quick-and-dirty" approach, you might be able to get an "effective" SHGC chart from the film manufacturer and use it with simplified window entry.

Attached is a similar chart I've used before from Vista Window Film.

Aaron

Aaron Dahlstrom , PE, LEED(r) AP
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Alex Krickx
Sent: Tuesday, July 19, 2011 12:46 PM
To: John Aulbach; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] eQuest Modeling of Film on top of Glass

Hi John,

I think this is how to do it: If you know the what the film is, I think you can create the new glass+film combo in LBNL's OPTICS. You can then import that new glass/film into LBNL's WINDOW. You should finally be able to make a DOE report file in WINDOW and import in eQUEST.

Regards,
Alex Krickx

Alex Krickx, LEED AP
Building Energy Specialist
Serious Energy, Inc.
1250 Elko Dr, Sunnyvale, CA 94089
(t) 408.541.8124
akrickx at seriousenergy.com<mailto:akrickx at seriousenergy.com>

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From: bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org> [mailto:bldg-sim-bounces at lists.onebuilding.org]<mailto:[mailto:bldg-sim-bounces at lists.onebuilding.org]> On Behalf Of John Aulbach
Sent: Tuesday, July 19, 2011 9:41 AM
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] eQuest Modeling of Film on top of Glass

Okay, Smart peoples:

I have an existing glass (say Solar Bronze) which has properties of SHGC, VT, and U-Value. I now wish to take this same glass and add a film on top of it to further enhance the SHGC and VT properties.

I cannot just take a diferent window from the Glass Library, because I do not know the additive SHGC and VT effects.  Is there any way to do a "glass-layers" operation? Or must I just guess at a glass that MIGHT be the equivalent?

Thanks.

John R. Aulbach, PE, CEM
Senior Energy Engineer
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