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[EnergyPlus_Support] Re: Window heat gain- shading coefficient calculation
Bing,
It's good to hear from you!
Thanks for the info,
Here is what I'm trying to do: Window 5 calculates the SC and SHGC
values based on this summer standard but I want to just take the
window glazing properties and the vertical fin (made of frit glass)
glazing properties from Window5 and plug it into E+ to get the window
transmitted solar, window solar absorbed window etc from E+ so i can
calculate SHGC of the window with the effect of the vertical fin.
Now, what should I specify as the run period in E+? Logically I should
specify the standard summer conditions in E+... Do you do it under
Sizing Period: Design Day?
Any input is highly appreciated!!
Thanks,
Pallavi
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Bing Dong"
<bingcat2007@...> wrote:
>
> Both Pallavi and Minu,
>
> Window 5 can do a better job.
>
> Shading coefficient should be calcuated under certain conditions
such as a
> summer condition:
> Indoor air temperature = 23.9C (75F)
> Outdoor air temperature = 31.7C (89F)
> Wind speed = 3.35 m/s (7.5 mph)
> 783 W/m2 (248 Btu/h-ft2) incident beam solar radiation normal to
glazing.
> ----E+ input output reference (p. 258)
>
> Glad to hear you two using E+.
>
> Bing
>
>
>
>
> On Thu, Dec 18, 2008 at 5:58 PM, Minu Agarwal
> <Minu.Agarwal@...>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@...> 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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