Re: [EnergyPlus_Support] EnergyPlus Building SImulation Time

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

Execution time depends greatly on the types of features in the model - 
daylighting, number of surfaces, number of zones, number of HVAC systems, 
natural ventilation, etc.

An annual simulation of the LgOffVAV example file (16 zones, served by one VAV 
air handler) takes 5-6 minutes on a 2.1 GHZ machine with 2 GB memory.

If you find execution speed to be an issue, CPU speed and adequate RAM are 
important.  RAM requirements change on the fly depending on what is in the 
simulation.  You can use the Windows Task Manager to monitor memory 
requirements.  Generally 2GB should be more than adequate.  Dual-cores do not 
help much, since EnergyPlus is not capable of using more than one core.

>From a modeling perspective, keep it simple, as few zones as necessary, as few 
surfaces, as necessary, and only model the features that are important to the 
task at hand.

Mike




 EnergyPlus uses one CPU core, so dual-core wil

On 1 Oct 2007 at 16:06, meet_pruthvi wrote:

> Hi All,
> 
> I am concern about..
> 
> How much time it would take for simulating Energy analysis for an 
> average complexity Building in EnergyPlus program.
> 
> What is the computer configuration required for completing the 
> simulation in a reasonable amount of time.
> 
> 
> 
> 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.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> 
> 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.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
 
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