Re: [EnergyPlus_Support] Re: Speeding up E+ simulation time with ruby script.

[Edwin Lee <leeed2001@xxxxxxxxx>]

That's right, that's the purpose of warming up, to eliminate the simulation's dependence on the selected initial conditions.  If the walls are the only significant transient objects in the simulation, I would say an overlap of a few days would be plenty, especially for well-controlled zones.

On Tue, Dec 8, 2009 at 19:08, Phylroy <phylroy.lopez@xxxxxxxxx> wrote:

 

So...does this mean the building is warmed up enough to not consider the long term thermal mass changes?

Personally I want to use this script to get a quick idea of where the model is at during development.. A full single simulation should be done for LEED or other compliance work, but if I can wrap some other functions to merge the .eso, csv, html files that would be more useful.

P.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Edwin Lee <leeed2001@...> wrote:
>
> As far as I know, the warmup day is exactly like the first day of
> simulation, the components should run as they would on the first day. I do
> know that some warning messages within the simulation are muted during
> warmup while things get converged, but the airflow network should still
> operate.
>
> Edwin
>

> On Tue, Dec 8, 2009 at 04:27, chris_malc_yates <chris_malc_yates@...

> > wrote:
>
> >
> >
> > So, if the loads converge (as per warm-up) the ends of the various eso/
> > csv/ bins should line up quite nicely. Do you know if the warmup
> > incorporates the Airflow network model?
> >
> >

> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx<EnergyPlus_Support%40yahoogroups.com>,

> > Linda Lawrie <linda@> wrote:
> > >
> > > Warmup simulates the first day of the environment until loads convergence
> > > is reached (or as you mentioned the building thermal mass has settled).
> > >
> > > These results are not recorded in the final results though you can get
> > them
> > > placed into the .eso file. (I don't remember if the csv will then show
> > > them or not).
> > >
> > > So, each split version will use the first day it thinks it is going to
> > > simulate as the warmup day.
> > >
> >
> >
> >
>

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