Re: [EnergyPlus_Support] Barefin radiative units

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

I would not expect the performance to be very different for a bare fin-tube 
compared to a fin-tube enclosed in a decorative grille.  I would use Baseboard 
Heater:Water:Convective.  Whether this will work with the DV model, I am not 
sure.  I need more information about the configuration and how you intend to 
model it.  Are you modeling the entire space as a single thermal zone?  Is the 
return air ducted through the upper portion (above the cloud), or does the 
upper portion see airflow through it?

Mike


On 14 Dec 2007 at 20:28, josh_miarch wrote:

> I'm attempting modeling a classroom that has been converted from an
> industrial shop. Because it used to be shop, the ceiling is high, 7.6
> m. There is a ceiling "cloud" at a height of about 5.6 m, with a 1 m
> gap between its perimeter and the walls of the classroom all the way
> around. 
> 
> The room is ventilated via DV, with the return grille being located
> within the cloud. There are radiant panels within the cloud that heat
> the section of the classroom below the cloud, and the mechanical
> engineer has decided to specify a barefin radiative unit to heat the
> upper portion. I'm curious as to what would be the best way to model this.
> 
> As a barefin unit is basically a baseboard unit without a cover on it,
> I was thinking that using the Baseboard Heater:Water:Convective object
> would probably be the best way to model it. However, I'm worried
> that this might interfere with the UCSD DV model I'm using. Am I right
> to be worrying about this? Also, even if the Baseboard
> Heater:Water:Convective object won't interfere with the DV model, is
> it the best way to capture the performance of a barefin radiative unit?
> 
> Thanks a lot,
> 
> Josh
> 
> 
> Josh Kjenner, EIT, LEED AP
> Manasc Isaac Architects Ltd.
> 10225 100 Avenue :: Edmonton, AB T5J 0A1
> 780.429.3977
> 
> 
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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