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[EnergyPlus_Support] Re: Finite difference method error
Hi Edwin,
I just posted the file "Conduction Finite Difference - strange results" on this group. I think I covered all my bases in terms of trying to eliminate all differences between the two zones. But I am a new user. Your insight would be appreciated.
Cheers,
Liam
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Edwin Lee <leeed2001@...> wrote:
>
> Liam:
>
> If you haven't posted your input file elsewhere, and you are able to, could
> you? I'd like to have a look, as I am also working with the finite
> difference algorithms.
>
> Thanks,
> Edwin Lee
> EnergyPlus Development Team
>
> On Fri, Oct 23, 2009 at 07:03, YuanLu Li <yli006@...> wrote:
>
> >
> >
> > Is the longer axis of the building, North-South, or East West?
> >
> > Are the two zones joined with a partition or separate?
> >
> > The sun and wind are turned off. What do you think would be the external
> > conditions? DesignDay, sizing and normal run period may give different
> > answers.
> >
> > Turn the building around at different orientation angles and see how the
> > values changes.
> >
> > Dr. Li
> >
> >
> >
> >
> > ------------------------------
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > From: tincandanedo@...
> > Date: Thu, 22 Oct 2009 23:03:48 +0000
> > Subject: [EnergyPlus_Support] Re: Finite difference method error
> >
> >
> > This is interesting... Have you tried changing the time step? Another
> > possibility is that the system hasn't reached steady state. Finally, is it
> > possible to change the size of the control volume?
> >
> > José Candanedo
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "liambrn" <liambrn@> wrote:
> > >
> > > I have created two adjacent zones with identical wall constructions,
> > geometry and boundary conditions. I turned sun and wind exposure off. The
> > temperatures are free floating. However, I'm seeing a difference of about 3C
> > between the two zones throughout the day. The zones remain within ~0.2C
> > using the ConductionTransferFunction method. Thoughts?
> > >
> > > Thanks.
> > >
> > > Liam O'Brien
> > >
> >
> >
> >
> > ------------------------------
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> >
> >
> >
>
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