Are you using a thermostate
or an equation to control the cooling? You should use an thermostate. An
equation gives a zero or an one, so it can go off/on/off/on and your program crashes
(on because it reaches setpoint and then off because wanted temperature is
reached) A thermostate has a dead band and it chooses on/off after 5
iterations. It is less accurate but your program runs.
Good luck
Mariëlle
Van:
frodriguezpc@labein.es [mailto:frodriguezpc@labein.es]
Verzonden: maandag 27 september
2010 9:42
Aan: Mariëlle Nuchelmans
CC: trnsys-users@cae.wisc.edu
Onderwerp: RE: [TRNSYS-users]
digging into trnflow convergence problems
It crashes even at n=7 timestep... I am pretty sure it
has to do with this temparature thing. A check to my lst file shows this clear
pattern with lack of convergence in al the external temperature peaks, so I
turned off cooling and the result is I get convergence thanks to interior
temperatures going above exterior at most of the previous conflict timesteps...
still there are a couple times of year where I still get higher ext. temps, and
convergence problems show
Francisco
Rodríguez Pérez-Curiel
TECNALIA-Construcción
Parque Tecnológico, Edificio 700. E-48160 Derio (Bizkaia) (SPAIN)
Tel. +34 94 607 33 00, Fax. +34 94 607 33 49
francisco.rodriguez@tecnalia.com,
www.tecnalia.com
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Mariëlle Nuchelmans
<M.Nuchelmans@chri.nl>
27/09/2010 09:18
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Para
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"frodriguezpc@labein.es"
<frodriguezpc@labein.es>
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cc
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"trnsys-users@cae.wisc.edu"
<trnsys-users@cae.wisc.edu>
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Asunto
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RE: [TRNSYS-users] digging into trnflow
convergence problems
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You could try even smaller time-steps, I’ve
models with timestep: 0,03125 (n=5), 0,015625 (n=6) and even 0.0078125 (n=7).
It just takes a while before it’s finished calculating.
Kind regards,
Mariëlle