Re: [EnergyPlus_Support] Heat transfer on an open door.

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

A door subsurface in EnergyPlus will function as a heat transfer surface for 
the entire simulation.  This does not change when COMIS models the door as 
open.  The only information that COMIS passes to the main EnergyPlus heat 
balance simulation is flow rates for infiltration and mixing (flow from one 
zone to another).  So the heat transfer between the two spaces will be slightly 
overcounted during the open door condition.

The only mechanism for changing the properties of a heat transfer surface is to 
use Movable Insulation.  Movable Insulation is typically applied to an exterior 
surface.  I have to check whether it can be used on a surface between zones.

Mike


On 3 Dec 2003, at 16:51, Joe Huang wrote:

> Picky, picky.  I don't know the answer to this, but others in the EnergyPlus
> Development must : does EnergyPlus allow users to input a schedule for heat
> transfer surface properties such as conductance, area ?
> 
> Joe
> 
> ----- Original Message -----
> From: "waspoorboy" <mingsbox@xxxxxxxxxxxxxx>
> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
> Sent: Wednesday, December 03, 2003 3:05 PM
> Subject: [EnergyPlus_Support] Heat transfer on an open door.
> 
> 
> > A closed door between two thermal zones will have heat transfer.
> > When using COMIS without HVAC and the door is defined fully open
> > for COMIS, the door becomes thermal mass of one of the two zones.
> >
> > However, in such a case EnergyPlus will still treat the door as a
> > heat transfer subsurface.
> >
> > Any suggestions or solutions to this ?
> > Thanks,
> > Ming
> >
> >
> >
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> 
> 
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> 
> The group web site is:
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx


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