Re: [EnergyPlus_Support] Window inside face conduction

["Michael J. Witte" <mjwitte@xxxxxxxx>]

The report variables you seek do not exist.  Emanuel's suggestion will 
only be an approximate solution, because the window u-value (even 
without film coefficients) varies depending on the temperature 
difference across any gas layers.

Mike


Emanuel Sá wrote:
> Hi Clarice
>
> My suggestion is that, since you have the possibility of knowing the inside
> and outside surfaces temperatures, you might be able to estimate the
> conductive gains through the window using the equation:
>
> Q = U*A*dT
>
> The U value should be without film coefficients and the dT is the
> temperature difference between the inside and outside face of the window.
> Maybe this is too simple and does not work for a transient situation...well,
> its just a suggestion!
>
> Best regards
>
> E.Sá
>
>
> 2008/2/27, Clarice Bleil de Souza <claricebleil@xxxxxxxxxxxx>:
>   
>>   Hi everyone,
>>
>> Any chance I can get the variable: window inside face conductive gains/
>> losses?
>>
>> I thought about getting it from:
>>
>> Window inside face conductive gain =
>> Widown heat gains - Window transmitted solar - Convective heat flow to the
>> zone from zone side of the glazing
>>
>> But I still cannot get the following variables out of the "window heat
>> gains" term to make the calculation of the conduction more accurate:
>>
>> - Net IR heat flow to the zone from zone side of the glazing
>> + Short-Wave radiation from zone transmitted back out the window.
>>
>> Would my simple outlined equation be a very rough approximation?
>>
>> Please let me know if you have any other interesting idea about that.
>>
>> Thank you very much in advance for that
>>
>> Best regards,
>>
>> Clarice
>>
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>> [Non-text portions of this message have been removed]
>>
>>  
>>
>>     
>
>
> [Non-text portions of this message have been removed]
>
>
>
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