[TRNSYS-users] (no subject)
Jason Glazer
jglazer at gard.com
Thu Nov 20 09:59:19 PST 2014
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Jason
On 11/20/2014 9:23 AM, haydar kepekçi wrote:
> Dont send me e- mail !! I dont want to see ur words about
> trnsys !!!
>
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>
> On Per, Kas 20, 2014 at 4:32 PM, Ben Heymer
> <bheymer at gmail.com <mailto:bheymer at gmail.com>> wrote:
>
> You should look through your "Result" file for the
> source of the error.
>
> A common cause of errors of this type is convergence.
> Make sure you
> have enough volume in your water loop for at least 1
> timestep of water
> flow. Sometimes it's also helpful to connect the mass
> flow output of
> the pump right back to the mass flow input.
>
> As a last resort, you can relax the convergence
> parameters and error
> thresholds in the control cards.
>
> Ben Heymer, PE
>
> On Thu, Nov 20, 2014 at 3:52 AM, Michael Stochniol
> <stochnio at mail.hs-ulm.de> wrote:
> > Hallo everyone,
> >
> > im trying to create a control function using
> equations with logic operators for the control of a
> variable speed pump, in order to adjust the massflow
> trough the pump. I wrote a control funktion and plotted
> it without connecting it to the pump and it seemed to
> work right. But if i am conecting it to the pump my
> simulation freezes after around 700 timesteps or less. I
> am trying to create solar domestic hot water system. The
> question is, is it possible to create this kind of
> control circuit with equations ? I have similar problems
> with every control loop i am trying to create this way.
> The math should work but implemented in TRNSYS (TRNSYS
> 17) the simulation stick somewhere.
> >
> > I am no experienced user so maybe someone could give
> my some advise how to implement this kind of control
> functions right?
> >
> > i am very grateful for any help or ideas.
> >
> > thanks in advance
> >
> > Michael Stochniol
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> >
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--
Jason Glazer, P.E., GARD Analytics, 90.1 ECB chair
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