Re: [EnergyPlus_Support] Help

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

The Psychrometric errors are happening because the zones are overheating.  The 
zone mean air temperatures are exceeding 100C.  Check the thermostat controls, 
magnitude of internal gains, and sizing of the fan coils and other HVAC 
equipment.

Mike


On 30 Mar 2005, at 5:38, energypluser wrote:

> 
> 
> Dear ALl,
>    I got another problem here now. Because the internal gains in the 
> exaple files are usually small, I changed the values and the size of 
> the zones. But after the simulation, there are 6 warnings as follow;
> 
> ** Warning ** Calculated Humidity Ratio is invalid (PsyWFnTdbRhPb)
>    **   ~~~   **  Occurrence info=CHICAGO IL USA TMY2-94846 
> WMO#=725300, 01/02 15:20 - 15:30
>    **   ~~~   **  Dry-Bulb= 99.84 Relative Humidity (fraction)= 1.00 
> Pressure= 98366.66
>    **   ~~~   ** Calculated Humidity Ratio= -25.0268 ... Humidity Ratio 
> set to .00001
> 
>    Does it have a effect on the cooling and heating loads results?
>    How to settle it down?
> 
>    Thank you in advance.
> 
>                                         Charlie
> 
> 
> 
> 
> 
> 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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