Re: [EnergyPlus_Support] non-closed space

[Rick Strand <rkstrand@xxxxxxxx>]

That is correct--EnergyPlus does not need a completely enclosed space to 
perform a load or an energy calculation.  In addition, EnergyPlus will not 
assume any "default" values for things that do not exist because it does 
not check for the presence of say a roof or floor in every zone.  The lack 
of any particular surface is basically ignored from the perspective of heat 
transfer through it and interaction with other defined surfaces within a 
zone.  Note, however, that the lack of a surface does not leave a big hole 
through which you would receive more ventilation, infiltration, etc.  The 
basic philosophy inside EnergyPlus is: what the user does not define is not 
simulated and something will affect the simulation only if the user defines 
it.  Lack of a particular surface could be seen as one way of specifying an 
adiabatic surface without any thermal mass.

Hope this information helps,

Rick Strand
EnergyPlus Development Team

At 04:04 PM 7/13/2004, you wrote:
>as i read from the documentation of energyplus, energyplus does not
>need a closed space in order to do energy calculation. if i have a
>space for which i do not specify roof and floor, what assumption will
>energyplus make about these surfaces?
>
>thanks!
>
>
>
>
>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
>
>
>
>



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