Re: [EnergyPlus_Support] Set point not met

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

Yes, a properly autosized system should be able to meet the zone setpoints on 
the design days.  Things to check:

1.  If using coil:water:cooling, we have recently learned that it may not size 
properly if the design delta humidity ratio is less than 0.01.  Check the 
component sizing report for the cooling coil(s) in the eio output file.  If the 
design entering minus leaving humidity ratio is smaller than 0.01, change to 
using the COIL:Water:DetailedFlatCooling

2.  Is the supply air temperature setpoint being met?  The design supply air 
temperatures in the sizing objects must match the setpoint controls in the 
simulation.

3.  Are the chillled water/hot water supply setpoints being met?  Again, the 
setpoint controls must match the specifications in the plant sizing objects.

4.  Also check availability schedules.

Mike


On 23 Nov 2005, at 5:07, dust_broom wrote:

> Dear all. 
> 
> I've simulated a cooling system for a 4 zone bilding using a chiller a 
> boiler(for reheat), coils and a single duct . Every component was 
> suposed to be autosized. So I did the autosize. But than, in the 
> results I saw that only one of the four zones had its temperature 
> correct. the others were floating arround 6 degrees. Even in the 
> design day simulation some zones were too hot. shouldn't the design 
> day be sizing those equipments in order to maintain the zone 
> temperatura as specified? Am I doing anything wrong?
> 
> Thank you, Emanuel
> 
> 
> 
> 
> 
> 
> 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.idf and press the
> "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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