Re: [EnergyPlus_Support] Window heat gain- shading coefficient calculation

On Thu, Dec 18, 2008 at 5:58 PM, Minu Agarwal <Minu.Agarwal@xxxxxxxxxxxxxxx> wrote:

Hi Pallavi.

I find the dummy box methodology good. Basically have a room with the window and measure the incident vs the penetrated solar radiation with and without the solar shade.

I think this is what you were trying to do too?

Minu

Minu Agarwal LEED AP

Building Physicist, CoSA Solutions

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Pallavi Mantha
Sent: Thursday, December 18, 2008 1:12 PM

To: EnergyPlus_Support@xxxxxxxxxxxxxxx

Subject: Re: [EnergyPlus_Support] Window heat gain- shading coefficient calculation

Thanks Ned,
but I'm not sure if Window takes into account shading from the shading fin.
Thanks,
Pallavi

On Thu, Dec 18, 2008 at 12:57 PM, Edward G. Lyon <eglyon@xxxxxxx> wrote:

You can calculate glazing properties using the WINDOW and OPTIC programs from LBL. OPTIC allows you to make a glass for WINDOW using different base glasses and applied films as long as they are in the current library. WINDOW will then calculate a number of glazing system performance parameters based on the glass you import from OPTIC

Ned Lyon, P.E. (MA)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of pallavimantha
Sent: Thursday, December 18, 2008 12:12 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Window heat gain- shading coefficient calculation

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 Iâ??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 conditionsâ?¦ so If I simulate the base case as 1/8â? clear
glassâ?¦ and then calculate the ratio.. I should get my resultâ?¦ (?)

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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