Re: [EnergyPlus_Support] report

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

Opaque Surface Inside Face Conduction is intended for detailed examination of 
the heat balance on a particular inside surface, primarly to support 
comparisons with measured data.  It is not meaningful as a component of the 
current heating or cooling load.  Surfaces interact with the zone air heat 
balance by convection.  So, the value of most interest is 
(SurfaceInsideTemperature - ZoneAir Temperature) * SurfaceArea * 
SurfaceInsideConvectionCoefficient to calculate the current load due to the 
surfaces.  This will include the current load due to solar gains, because solar 
becomes a load by warming a surface.

For an example of comparing the load with a hand calculation, see files 
UAdeltaT,zip and UAdeltaT2.zip in

http://groups.yahoo.com/group/EnergyPlus_Support/files/Examples/

Mike


On 5 Apr 2004, at 20:16, David Cormier wrote:

> Hello,
> 
> I do a simple test with EnergyPlus.  It's about a simple room with no 
> internal load.  I look at the result
> 
> If I add : ZONE1:Zone Window Heat Gain[W](Hourly) + MUR1:Opaque Surface 
> Inside Face Conduction Loss[W](Hourly) or gain for my wall + TOIT:Opaque 
> Surface Inside Face Conduction Loss[W](Hourly) or gain
> 
> I think that I suppose to have the same result as ZONE1:Zone/Sys Sensible 
> Load Predicted[W](Hourly).  In heating, its ok, but in cooling, I have a 
> mistake because the result of the add is always higher than the result of 
> ZONE1:Zone/Sys Sensible Load Predicted[W]
> 
> I suppose that I forget a term in the add ... Do you have an idea?
> 
> David Cormier
> 
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>  -- please post any files to the appropriate folder in the Files are of the
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> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx



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