[Bldg-sim] Window Heat gain - Shading Coefficient

[Vikram Sami]

Pallavi,

Go to  www.chhayaonline.org and try out the beta version.  Attached is
the PDF version of the technical paper we wrote for the ASES conference
earlier this year. The program is still in development - especially the
weather import tools, but this might be exactly what you are looking
for. If you need, I can send you the weather file you need.

 

If you look at section 4.0 (pg 3) of the paper, it describes how the
effective shading coefficient is calculated based on the profile angle
and the window overhang. The program allows you to play around with the
overhangs and updates the shading coefficient matrix real time. 

 

Feel free to call me if you have any questions. 

Vikram Sami, LEED AP 
Direct Phone 404-253-1466 | Direct Fax 404-253-1366 

LORD, AECK & SARGENT ARCHITECTURE
1201 Peachtree Street NE, Suite 300, Atlanta, GA 30361 
Responsive Design * Technological Expertise * Exceptional Service 
Please visit our new website | www.lordaecksargent.com
<file:///\\www.lordaecksargent.com\> 

P Think GREEN before you print.

 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Pallavi
Mantha
Sent: Thursday, December 18, 2008 12:05 PM
To: bldg-sim at lists.onebuilding.org
Cc: equest-users at lists.onebuilding.org
Subject: [Bldg-sim] Window Heat gain - Shading Coefficient

 

All,

 

I need to calculate shading coefficient of a window glass with and
without the effect of a shading fin. I could not find any software that
does this for me so this is how I'm trying to calculate it: Calculate
window heat gain for both cases from Eplus and then perform a manual
calculation to get shading coefficient of the window. Since the shading
coefficient is the ratio of solar heat gain admitted through the glass
as compared to the solar heat gain admitted through 1/8" clear glass
(1/8" clear glass = 1.0 Shading Coefficient) under similar conditions...
so If I simulate the base case as 1/8" clear glass... and then calculate
the ratio.. I should get my result... (?)

 

Did anyone of you face this kind of a scenario before? Can you please
shed some light on this?

Would you know of any tools that does this kind of simulation?

Any input is highly appreciated!

 

Thanks,

Pallavi

 

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