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Re: [EnergyPlus_Support] warnings about "temperatuer out of range"
These types of errors almost always come from initial iterations in the
detailed cooling coil model which result in calling a Pyschrometric function
with an impossible humidity condition. There is not actually a temperature of
35286.37 occuring within the simulation.
Currently Compact HVAC uses COIL:Water:DetailedFlatCooling to model chilled
water coils. For certain types of applications, this model generates such
warnings. Since these warnings usually result during early iterations within
the coil model, they typically do not impact the results, but I cannot say that
with certainty for all cases.
To eliminate these warnings, try editing the expidf file (saved under a new
name.idf) and replace the COIL:Water:DetailedFlatCooling objects (and all
occurences of COIL:Water:DetailedFlatCooling) with COIL:Water:Cooling. Future
versions of Compact HVAC will allow the user to select the specific chilled
water coil model to be used.
Mike
On 12 Apr 2007 at 18:48, Zhen Tian wrote:
> Dear all,
>
> I am simulating base case design for an office building located in ShenZhen
> (ASHRAE Zone 2A) and experiened the following warnings:
>
> The system is VAV reheat and all system components are autosized and generated
> with Compact HVAC object.
>
> Could someone tell me that whether these warnings will affect my simulation
> results? What inputs cause these warnings and how can I fix these warnings?
>
> Thank you very much in advance.
>
> Regards,
>
> David
>
> ** Warning ** Temperature out of range [-100. to 200.] (PsyPsatFnTemp)
> ** ~~~ ** Occurrence info=SHENZHEN - CHN TMY3-594930 WMO#=594930, 01/02
> 00:45 - 01:00 ** ~~~ ** Input Temperature=35286.37 ** Warning **
> Temperature out of range [-100. to 200.] (PsyPsatFnTemp) ** ~~~ **
> Occurrence info=SHENZHEN - CHN TMY3-594930 WMO#=594930, 01/02 01:00 - 01:15
> ** ~~~ ** Input Temperature=102750.91
> ........
>
>
>
>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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