Re: [EnergyPlus_Support] total energy flow

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

It is very difficult to separate envelope loads from the total zone load, 
because a heat balance is performed at each surface which includes incident 
solar and long-wave radiation.  There is no report variable with such a value.  
Surfaces interact with the zone air heat balance by convection.  The ultimate 
load from the surfaces is (SurfaceInsideTemperature - ZoneAir Temperature) * 
SurfaceArea * SurfaceInsideConvectionCoefficient, but this includes the solar 
gains and radiant internal gains which are absorbed by the surfaces.  The best 
way to approximate the contribution from the envelope is to take the total load 
and subtract off the gains from windows, internal loads, infiltration, and 
ventilation.  The remainder will approximate the impact of the envelope.

Mike


On 1 Mar 2005, at 12:40, mohammed khaylani wrote:

> 
> dear sirs
> how can i calculate the total energy flowed into the zone (Q total= Q wall + Q
> windows + Q roof) if it is possible to guide me how to calculate it thank u
> mohammed samier
> 
> 
> ---------------------------------
> Do you Yahoo!?
>  Yahoo! Mail - Easier than ever with enhanced search. Learn more.
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> 



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




The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/