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[TRNSYS-users] Convergence problem in the Building-Type
Hello!
At the moment I'm
simulating a 5-zone-model of a Building.
Two of the rooms are
equipped with in sum three heating-grids (modelled through active layers) (more
heating grids will be required in future)
The timestep is 0.25
hours.
The
inlet-temperature of the active layers is controlled by an
iterative-feedback-controller in that way, that the average between the inlet-
and the outlet-temperature is equal to the surface-temperature of the wall
containing the active-layer.
Simulation only one
room with only one active-layer of this kind the simulation worked
perfectly.
When I transferred
the described system to the five-zone-model I got the following error
approximately at hour 90:
"(TYPE56) Convergence of COMIS-TRNSYS not attained
within 50max. number of internal iterations!"
(Respectively the error that this warning occurred to
often).
Varying the Tolerances, the timestep and the maximum
number of iterations in the SimulationStudio didn't solve the
Problem.
A reduction of the TimeBase is not possible due to the
stability-criteria of the BuildingType is no longer
fulfilled.
My conclusion (?) is that the maximal number of
iterations within TYPE56 is independent from maximal number of iterations in the
TRNSYS-Deck and this number is' maximum 50.
That this might not be sufficient for a case as complex
as the case at hand seems reasonable.
Is there a possibility to increase the maximum number
of iterations within Type56 eg. are there any further
suggestions?
Thank You!
With kind regards,
Matthias
Kersken
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Dipl.-Ing. Matthias
Kersken
Wissenschaftlicher
Mitarbeiter / Abteilung Energiesysteme
Fraunhofer-Institut für
Bauphysik
Institutsteil Holzkirchen
Fraunhoferstraße
10
83626 Valley
eMail: Matthias.Kersken@ibp.fraunhofer.de
Telefon
08024 / 643-204
Telefax 08024 / 643-366
www.ibp.fraunhofer.de |
|
|
Dipl.-Ing. Matthias Kersken
Research Associate / Department Energy Systems
Fraunhofer Institute for Building Physics
Branch
Holzkirchen
Fraunhoferstraße 10
D-83626 Valley
eMail: Matthias.Kersken@ibp.fraunhofer.de
Phone +49 8024 / 643-204
Fax +49 8024 /
643-366
www.ibp.fraunhofer.de |
|
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