RE: [EnergyPlus_Support] Trench Heating for moderating window condensation

["Edward G. Lyon" <eglyon@xxxxxxx>]

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

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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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