[EnergyPlus_Support] What cause the Zone/Sys air temperature diverge?

["landlord0l" <zplin99@xxxxxxxxxxx>]

Hi,

I described several zones, each of which equipped with a window-type 
air conditioner. A single cooling setpoint schedule (the zone air 
temperature was set to 23 degree centigrade from 11:00pm to 7:00am 
each day) was described in the object "Zone control and thermostats".

The simulated results seem to be satisfied in most of the days 
including summer design day. However, the zone/sys air temperature 
could not equal to the required setpoint temperature in some days.
For example, the zone/sys air temperature from 11:00 pm to 7:00 am 
in one day was 20,18,17,17,16,15,14,14,14 degree centigrade 
respectively. This divergence on air temperature appear 
periodically, although the outdoor air temperature (dry and dew) did 
not change a lot.

What is the possible reason to cause this deviation?

Thanks!

Zhongping



------------------------ Yahoo! Groups Sponsor ---------------------~-->
Looking for the latest Free IT White Papers?
Visit SearchMobileComputing.com to access over 500 white papers.
Get instant access at SearchMobileComputing.com Today
http://us.click.yahoo.com/ZyjvfD/PLNGAA/uitMAA/dkFolB/TM
---------------------------------------------------------------------~->

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

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 are of the Support Web Site.




 

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