[bldg-sim] Modelling an automatic radiation responsive exterior pull down shade

[Grant Unsworth]

Keith,

Under window properties, there is a tab called: "Blinds - Slats - 
Drapes". Here is what eQuest says:

If the heat gain transmitted through the window from direct solar 
radiation (with the shades and blinds not covering the glazing) exceeds 
the Maximum Solar Schedule threshold value, the shading device covers 
the window (and DOE-2 uses the Shading Schedule to calculate the solar 
transmittance of the window and shade). Both the Shading Schedule and 
the Conductance Schedule will only be used when the direct solar gain is 
greater than the Maximum Solar Schedule threshold value.

Specify a "Maximum Solar Schedule", then specify a corresponding 
"Shading Schedule" for the window.

Is this what you were looking for? Hope this helps,

 - Grant



Keith Huang wrote:

>
>  
>
> Hello everyone:
> I am now encountered a problem in modeling an automatic pull down 
> exterior shades of a window, and am seeking your help. The radiation 
> responsive exterior shade will be triggered when the radiation arrives 
> on the exterior surface of the window pane exceeds a certain amount 
> (say 30btu/ft2hr). Since there is a relatively good insulation 
> properties of the exterior shade (say U-value= 1.1 W/m2h), I would 
> like to let DOE2 to take the insulation effect of the shades when it 
> is deployed into consideration. Do you have any suggestions on how to 
> model this?
>
> Any slight comments will be highly appreciated!
>
>  
>
> best regards
>
>  
>
> Kuo-Tsang Huang
>
> PhD. Candidate
>
> National Cheng-Kung University
>
> Architecture Dept.
>



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