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Re: [TRNSYS-users] Convergence failure in the simulation
Chun Kwong,
Convergnce problems are a result of one of two things usually.
Either there is not enough thermal capacitance in a given flow loop
(such as a piping network) or the time step is too big. If I recall,
your simulation was using a 1 hour time step. I would recommend
starting by reducing that time step to 0.125 hours to see if that
solves the convergence problems. The bore field and the building in
your system should be providing adequate thermal capacitance.
Kind regards,
David
At 21:17 5/21/2007, h8304506@hkusua.hku.hk wrote:
Dear all.
I am simulating a GSHP system, but receive warnings that some units do
not converge at particular time steps. The simulation stops after the
number of warnings reach a limit. I try to adjust the minimum
relaxation factor and tolerance of convergence in the control card,
but it seems to have no improvement. Please advise how I can fix it?
Thank you!
Yours sincerely,
LEE, Chun Kwong
PhD student
Department of Mechanical Engineering
University of Hong Kong
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