Re: [EnergyPlus_Support] setpoint

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

This is a VAV system and all zones are meeting setpoint on the cooling design 
day.  The north zones are not meeting setpoint on the heating design day, 
because the VAV damper heating action is defaulting to NORMAL.  In these zones, 
the heating design airflow rate is greater than the min supply fraction (0.3) 
times the cooling design airflow.  In these zones, it is necessary to use 
REVERSE ACTION or supplement the heat with baseboard.  I tested it with all the 
zones set to REVERSE ACTION and the zone meet setpoint on the winter design day.

Mike

p.s.  I see you are still using version 1.1.1.  I encourage you to upgrade to 
version 1.2.0.

On 20 Jul 2004, at 21:37, pizzaalan wrote:

> Dear all,
> 
> I simulate a building in design days. The problem is that in the 
> north side zones the air temperature (15C) is much lower than the 
> setpoint winter (21.1 C) in winter. The other 3 side zones can meat 
> the setpoint very well.
> 
> I increase the sizing factor from 1.3 to 1.8, then the temperatures 
> of north side zones can reach to the setpoint. I don't know why it 
> is.
> 
> I upload my file, "MySingleDuctReheatwithEconomizer" 
> and "Window5DataFile". Appreciate it if someone can have a look and 
> give some suggestion. Thanks.
> 
> Alan
> 
> 
> 
> 
> 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



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