[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[EnergyPlus_Support] AirflowNetwork - "too many iterations" error message

Hi all,

I am simulating the airflow in a supertall building with simple 
openings at the bottom and at the top.
I am using the SURFACE AVERAGE CALCULATION wind pressure coefficient 
type even if the building hasn't got a rectangular shape (but a 
cylinder one) beacuse I do not dispose of the wind specifications 
required for the INPUT option.

I am running an hourly simulation all the year long, but after 
February it crashes showing the following message:



 Severe  ** Too many iterations (SOLVZP) in AirflowNetwork simulation
   ** Warning ** AirflowNetwork: SOLVER, Changing values for 
initialization flag, Relative airflow convergence, Absolute airflow 
convergence, Convergence acceleration limit or Maximum Iteration 
Number may solve the problem.
   **   ~~~   **  Occurrence info=INCH'ON - KOR IWEC Data 
WMO#=471120, 04/27 12:20 - 12:30
   **   ~~~   ** ..Iterations=30000, Max allowed=30000
   **  Fatal  ** AirflowNetwork: SOLVER, The previous error causes 
termination.


I know someone had the same problem with the 1.4 version but I 
couldn' find the solution on the forum (message 7445 "Airflow Network 
through multizones").

can you help me please? 
I submitted the file in the Problem_Submittals folder, its name 
is "airflow supertall"

thanks a lot in advance!

Marzia 


------------------------------------

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

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    mailto:EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/