Re: [EnergyPlus_Support] Suspended radiant panels

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

1.  I suppose you could describe a surface which is positioned as thought it is 
supsended.  This would have to be a pair of surfaces (one facing up and one 
facing down) which are connected as "interzone" surfaces even though both are 
in the same zone.  But understand that the radiant view factor calculations are 
not full 3-D.  View factors are affected by azimuths and tilts, but position in 
the zone does not matter.  If the radiant panels are electric, you could use 
the high temperature radiant model (HIGH TEMP RADIANT SYSTEM) and specify the 
view factors directly.

2.  Low temp radiant systems are only valid on base surfaces (not subsurfaces, 
no internal mass).  You would need to describe the ceiling as two or more 
SURFACE:HEATRANSFER objects, one with the area of the radiant panel, and one 
with the remaining ceiling area.

Mike


On 5 Sep 2007 at 13:21, lorenzomattarolo wrote:

> Hi, 
> I'm simulating an office with radiant panels on the ceiling.
> 
> 1. Is it possible to put the radiant panels as they were suspended
> from the ceiling?
> 
> 2. The panels aren't as wide as the ceiling. How can I set this in the
> surfaceHeatTransfer? Do I have to put one surface with a normal
> construction for the ceiling and a smaller one with internal source
> for the panel?
> 
> Many thanks,
> 
> Lorenzo
> 
> 
> 
> The primary EnergyPlus web site is found at:
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> 
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> 
> Attachments are not allowed -- please post any files to the appropriate folder
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> 
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> Documentation link and press the "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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