Re: [TRNSYS-users] A lot of convergence warnings

[knut.erik.enerstvedt@niva.no]

In addition to reducing time
step length, I would try the following:

- Check if there is sufficient
thermal mass in your system (add pipes in fluid loops, for example).
- Use controllers (such as
Type 2) instead of equations (LT, GT and similar) when variables that can
change from one iteration to the next are involved.
- Place components in a "natural"
calling order (controllers before controlled equipment, for example): Control
cards->Component order: Click and drag the different components to order
them.
- Use an online plotter to
check if there are any unrealistic output values (very high temperatures,
for example).

Best regards,
Knut Erik Enerstvedt




>You could change the simulation
time step (in steps of 1/(2^n) so 1 hour, 0,5 hour, 0,25 hour etc). You
can find this by assembly -> component >order.
 
>Good luck,
 
>Mariëlle Nuchelmans
 
 
>Hi,
 
>What can I do when there are
lots of convergence problems??? The same project has different warnigs
because of that if the simulation >starts at 3896 than if it starts
at 0.... Does the option "Optimaze component order" work?? If
I select that option other errors appear... :(
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