Re: [EnergyPlus_Support] Question on CoolingCoil error message

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

The errors mean that the face area of the coil is too small for the volume flow 
rate across the coil.  In the COIL:Water:DetailedFlatCooling objects, are you 
setting this field to autosize?

    autosize,                !- Minimum Air Flow Area {m2}

Other fields which may cause this problem are  Number of Tube Rows and Number 
of Tubes per Row.

Mike



On 23 Jul 2007 at 6:30, love9787m wrote:

> Currently running the simulation on DOAS with Pakaged Terminal Heat 
> Pump, The center Zone of the building is served by DOAS and Out Zone
> (parameter Zone) is served by Packaged Terminal Heat Pump.
> At first, The simulation of building served by VAVsystem is successful.
> But second simulation model doesn't work due to those problem below.
> I've already adusted capacity of DETAILED COOLING COIL to autosizing.
> Above all, I really don't know fatal error what it is.
> I'm so tried of this repeated problem 
> 
> ** Warning ** COIL:Water:DetailedFlatCooling in Coil =DETAILED COOLING 
> COIL
>    **   ~~~   ** Air Flow Rate Velocity has greatly exceeded upper 
> design guidelines of ~2.5 m/s
>    **   ~~~   ** Air MassFlowRate[kg/s]=55.429247
>    **   ~~~   ** Air Face Velocity[m/s]=NAN
>    **   ~~~   ** Approximate MassFlowRate limit for Face Area[kg/s]=NAN
>    **   ~~~   ** COIL:Water:DetailedFlatCooling could be 
> resized/autosized to handle capacity
>    **  Fatal  ** Variable Z (NAN) out of range [0.0,1.0] in 
> CalculateEpsFromNTUandZ
> 
> Please let me know the method of this problem.
> 
> 
> 
> 
> 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.pdf under the
> Documentation link 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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