[Bldg-sim] Glass center-of-glass to assembly U-Value?

[Zeng, Ming]

Can we use glass center of glass shading coefficient for the assembly ? If not, is there any similar table for assembly shading coefficient calculation?
Thanks.

Ming Zeng, PE, LEED(r) Accredited Professional
Mechanical Engineer
[http://mail.leoadaly.com/ladlogorednl2.gif]
730 Second Avenue South, Suite 1100, Minneapolis, MN 55402-2455
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Andrew Craig
Sent: Monday, September 22, 2008 11:41 AM
To: Josh Greenfield; bldg-sim at lists.onebuilding.org; equest-users at lists.onebuilding.org
Subject: Re: [Bldg-sim] Glass center-of-glass to assembly U-Value?

Attached is a handy spreadsheet from the Oregon Energy Code User's Manual.  Hopefully this is what you are looking for.

Regards,


Please note my new e-mail address: andrewc at interfaceeng.com<mailto:andrewc at interfaceeng.com>

Andrew Craig, EIT,LEED AP/ Mechanical Designer/ Energy Analyst
INTERFACE ENGINEERING
direct 503.382.2696

________________________________
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Josh Greenfield
Sent: Monday, September 22, 2008 9:07 AM
To: bldg-sim at lists.onebuilding.org; equest-users at lists.onebuilding.org
Subject: [Bldg-sim] Glass center-of-glass to assembly U-Value?

Does anyone have any rules of thumb on a quick/easy approximation for taking a Center-of-Glass U-value and converting it to an Assembly U-value based on industry standard assembly constructions?  I know this depends on a lot of variables, like frame material and conductance, and the size of the overall glass assembly, etc., but I'm just looking for a quick estimate on performance reduction for comparisons to other window types for a particular building.

Also, is there an ASHRAE 90.1-2004 Baseline glass Visible Light Transmittance (VLT)?

Josh Greenfield, PE, LEED AP
Senior Associate
Primera Engineers, Ltd.
100 S. Wacker Drive, Suite 700
Chicago, IL 60606
312.606.0910 Main
312.242.6392 Direct
312.606.0415 Fax
jgreenfield at primerachicago.com<blocked::mailto:jgreenfield at primerachicago.com>
http://www.primerachicago.com
Be Green...please consider the environment before printing this email.
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