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Re: [EnergyPlus_Support] constant gradient room air model crash


Actually, I find well mixed a good simplification in most cases. I find it pretty hard to set up robust stratified models for office high spaces. It's do-able, but needs careful attention. So if the spaces are designed to be well mixed and the designer sizes the diffusers properly... 

Mit freundlichen GrüÃ?en- Sent from my iPhone (excuse the brevity)
i. A.
Jean Marais
b.i.g. bechtold
Tel.   +49 30 6706662-23
On 27.03.2014, at 21:59, Jeremiah Crossett <<mailto:jcrossett@xxxxxxxxxxxxxxx>jcrossett@xxxxxxxxxxxxxxx> wrote:

>  
> Meant to mention- it also runs fine without the room air model..  Curios if there are any room air model experts out there..  Personally I do not think that well mixed is ever realistic.. 
> 
> 
> Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203 
 | Mobile 503-688-8951
<http://www.phasechange.com/><http://www.phasechange.com>www.phasechange.com 
  <http://i.imgur.com/Sldxf.jpg>
> 
> 
> 
> 
> On Thu, Mar 27, 2014 at 1:48 PM, Jeremiah Crossett <<mailto:jcrossett@xxxxxxxxxxxxxxx><mailto:jcrossett@xxxxxxxxxxxxxxx>jcrossett@xxxxxxxxxxxxxxx> wrote:
>>  
>> I use the attached file with different geometry and it runs fine (can send if your interested) but with this specific geometry it has fatal error: 
>>  ** Warning ** Calculated Relative Humidity out of range (PsyRhFnTdbWPb)
   **   ~~~   **  Routine=CorrectZoneAirTemp, Environment=ANNUAL, at Simulation time=01/06 15:21 - 15:24
   **   ~~~   **  Dry-Bulb= -62.79 Humidity Ratio= 1.000E-005 Calculated Relative Humidity [%]= 183.17
   **   ~~~   ** Relative Humidity being reset to 100.0%
   ** Warning ** Temperature out of range [-100. to 200.] (PsyPsatFnTemp)
   **   ~~~   **  Routine=CorrectZoneHumRat, Environment=ANNUAL, at Simulation time=02/18 11:43 - 11:44
   **   ~~~   **  Input Temperature=282.24
   ** Warning ** Calculated Humidity Ratio invalid (PsyWFnTdpPb)
   **   ~~~   **  Routine=Unknown, Environment=ANNUAL, at Simulation time=02/18 11:48 - 11:49
   **   ~~~   **  Dew-Point= 283.44 Pressure= 81520.00
   **   ~~~   ** Calculated Humidity Ratio= -0.6563 ... Humidity Ratio set to .00001
   ** Severe  ** PsyRhoAirFnPbTdbW: RhoAir (Density of Air) is calculated <= 0 [-0.90579].
   **   ~~~   ** pb =[83005.00], tdb=[-592.06], w=[7.4910977E-004].
   **   ~~~   **  Routine=CorrectZoneHumRat, Environment=ANNUAL, at Simulation time=03/07 12:54 - 12:55
   **  Fatal  ** Program terminates due to preceding condition. 
>> 
>> Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203 
 | Mobile 503-688-8951
<http://www.phasechange.com/><http://www.phasechange.com>www.phasechange.com 

>> 
>> 
>> 
> 
> 



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