Re: [TRNSYS-users] Problems with Type66

["Diego A. Arias" <daarias@wisc.edu>]

Hi Julian,

It is possible that there is not enough inertia in the system, and that 
the simulation is entering infinite loops at each time step. I would 
recommend that you add a pipe to the collector loop, before the pump. 
The pipe should be long enough as to keep one-time step worth of fluid.
Please let me know if this strategy solves your problem.
Best regards,

Diego

Julian Demetz wrote:
> Dear Tnsys-Users,
>
> I’m working on a swimming pool simulation which is heated by a heat 
> pump. I’ve build the heatpump in EES.
>
> I’m using Type66 to call the EES function. It seems to work, but I get 
> in almost every timestep the Warning:
>
> The Inputs to Units 5 6 9 17 were not converged within the specified 
> tolerance at time XXXX
>
> I’ve set both tolerances (integration and convergence) to a value of 
> 0.001.
>
> Is the message normal when using Type66 or is it a hint for an error 
> in the model.
>
> I would be very happy if somebody could tell me something about this 
> convergence-message.
>
> Best regards
>
> Julian Demetz
>
> Universidade Federal de Santa Catarina, Florianópolis, Brazil
>
> Technische Universität München, Munich, Germany
>
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--
Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706