Re: [EnergyPlus_Support] Trench Heating for moderating window condensation

[fred buhl <wfbuhl@xxxxxxx>]

If nonuniform air mixing is expected to be significant, then EnergyPlus 
would not give a good
analysis of the problem. If the system can be designed to produce 
well-mixed air near the entire
window, EPlus can do a good job - in particular, it can do a good job of 
calculating window glass
surface temperatures & the user can vary the inside film coefficients as 
desired.

Fred Buhl

Edward G. Lyon wrote:

>I don't think EnergyPlus can do this analysis properly.  There is even mixing of zone air so any updraft at a window is not modeled.  I think you need to use CFD for a better estimate of performance.  I typically model the glass and frame system in THERM and then play with the inside boundary for both temperature and film coeficients (air speed) to find out what is needed for the window frame and glazing performance, then I try to make it happen in the design.
> 
> 
>Ned Lyon, Staff Consultant
> 
>Simpson Gumpertz & Heger Inc.
>41 Seyon Street, Bldg 1 Suite 500
>Waltham, Massachusetts  02453
> 
>781-907-9350
>
>________________________________
>
>From: EnergyPlus_Support@xxxxxxxxxxxxxxx on behalf of fred buhl
>Sent: Tue 2/21/2006 2:35 PM
>To: EnergyPlus_Support@xxxxxxxxxxxxxxx
>Subject: Re: [EnergyPlus_Support] Trench Heating for moderating window condensation
>
>
>Elmer - could you explain what trench heating is?
>
>Fred Buhl
>
>Elmer Morrissey wrote:
>
>  
>
>>Hi all,
>>
>>Can anyone give me some preliminary advice on simulating trench
>>heating in E+? I want to use it to control the effects of it and
>>attempt to advice a client if they can turn it off and not find
>>condensation on an extremely large glazed façade.
>>
>>I have considered using a baseboard heater linked to the hot water
>>plant. Is this the best way forward?
>>
>>Kind regards
>>
>>-Elmer 
>>
>>
>>
>>
>>
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>>
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>>
>>Yahoo! Groups Links
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>>
>>
>>
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>> 
>>
>>    
>>
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