Re: [EnergyPlus_Support] zero air loop mass flow rate

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

In the BRANCH object "Branch_Air_supply_in", the maximum flow rate is set to 
zero.  (Version 2.0 does generate a warning message for this condition - one of 
many reasons to upgrade!)  

Program Version,EnergyPlus 2.0.0.025, 4/13/2007 9:29 AM,IDD_Version 2.0.0.025
   ** Severe  ** Branch=BRANCH_AIR_SUPPLY_IN is an air branch with zero max 
flow rate.


When specifying hard values for sizes (instead of autosize), the maximum (or 
design) flow rate in the AIR PRIMARY LOOP, BRANCH, FAN, and other components on 
the air loop main branch must all have the same value.  And the sum of the 
terminal unit design flow rates must equal the main air loop flow rate.

Mike


On 13 Apr 2007 at 15:58, Sebastian Dietz wrote:

> Hello erverybody,
> 
> I'm simulating one zone modell to get familíar with Energy Plus. 
> Therefor I constructed an simple Air Loop. The primary air system side 
> contains Fan and coil:water:simple:heating elements, the zone equipment 
> side contains a singleduct:vav:noreheat element. I compared my file 
> serveral times with example files, but I have still no mass flow rate in 
> the Air Loop. I don't get any warnings, thus it seems to be a set point 
> or controller fault. Does anybody have an idea, how to solve the problem?
> I added my simpleairloop.idf file to the web
> 
> Thanks in davance
> sebastian
> 
> -- 
> Sebastian Dietz
> Fraunhofer-Institut for Solare Energiesysteme ISE
> Heidenhofstrasse 2, 79110 Freiburg, Germany
> Phone: +49 (0) 7 61/ 45 88-51 36
> Sebastian.Dietz@xxxxxxxxxxxxxxxxx
> http://www.ise.fraunhofer.de
> -------------------------------------------
> 
> 
> 
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> 
> 


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





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