Re: [EnergyPlus_Support] Zone Sizing - Operating hours

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

The thermostat schedules define the basis for autosizing.  Be aware that the 
day type specified in the DesignDay objects trigger particula schedules in the 
thermostat.  

While the philosophy of many of the example files is to size with 24/7 
operation, this is not the only valid approach.  If you wish to size for 
intermittent operation, use the thermostat setpoint and/or control type 
schedules to control this during the autosizing calculations.  For itermittent 
operation, the time averaging window in the SIZING PARAMETERS object becomes 
crucial.  The default for this results in a 1-hr recovery period, which may or 
may not be appropriate for equipment sizing.

Mike


On 5 Sep 2005, at 8:27, Linda Lawrie wrote:

> At 09:32 PM 9/4/2005, enerdata wrote:
> 
> >Zone autosizing seems to be on the basis of 24hr operation of the A/C
> >system - is it possible to have the autosizing done for imtermittent
> >e.g. 11 hrs/day by 5 days/week HVAC operation scenario?
> 
> It's better if you SIZE for the 24 hour operation but then RUN on the 
> actual operation you want.  That's why many of the sizing input files 
> have "SummerDesignDay", "WinterDesignDay" for sizing but don't "Run" 
> them (ref: Run Control) and use weather simulations to illustrate the "run".
> 
> 
> Linda
> 
> EnergyPlus WebSite: http://www.energyplus.gov
> Owner: EnergyPlus_Support list
> Member: EnergyPlus Development Team
> 
> 
> 
> [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




------------------------ Yahoo! Groups Sponsor --------------------~--> 
Most low income households are not online. Help bridge the digital divide today!
http://us.click.yahoo.com/cd_AJB/QnQLAA/TtwFAA/dkFolB/TM
--------------------------------------------------------------------~-> 

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/