I'm a bit confused.
In conclusion, is the integration method of E+ & Airnet ping-pong?
"lagged conditions for zone air in the predict step" it sounds like ping-pong. But I want to make it clear.
And...
From what version COMIS was removed?
I totally didn't know at all.
Thank you for all the replies
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>
> I would like to make a clear reply. The previous answer "We would say AFN
> uses lagged conditions for zone air in the predict step." was correct.
>
> Lixing Gu
>
>
> -----Original Message-----
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [ mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Lixing Gu
> Sent: Monday, March 07, 2011 8:47 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: RE: [EnergyPlus_Support] Re: Iteration principle between COMIS and
> E+
>
> The answer is correct.
>
> Lixing Gu
>
> -----Original Message-----
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [ mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of china4ever2003
> Sent: Monday, March 07, 2011 7:51 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Iteration principle between COMIS and E+
>
> I have posed this question before, and got the response "We would say AFN
> uses lagged conditions for zone air in the predict step." That to me sounds
> like ping-pong coupled. But this document
> http://simulationresearch.lbl.gov/dirpubs2/BS07/eplus_398.pdf seems to speak
> otherwise and imply onion coupling.
>
> What do you think?
>
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Drury B Crawley <dbcrawley@>
> wrote:
> >
> > EnergyPlus and Airnet (air flow network) are integrated. COMIS was
> removed
> > from EnergyPlus many years ago.
> >
> > Suggest you read the discussion on the AirFlowNetwork Model in the
> > EnergyPlus Engineering Documentation (starts on page 433 (or page 458 of
> the
> > PDF).
> >
> > All EnergyPlus documentation is searchable.
> >
> >
> >
> > On Sun, Mar 6, 2011 at 8:53 PM, Wonjun <lesthesia@> wrote:
> >
> > >
> > >
> > > Hello
> > > I wonder about the "Iteration principle" between COMIS(Integrated to
> > > E+:Airflow network) and E+
> > > I wonder whether this ping-pong or onion method.
> > > Maybe you know what ping-pong and onion but I'll explain regarding this
> > > briefly.
> > >
> > > Ping- pong iteration
> > > (1) In time step "t" Comis calculate the airflow rate and then this
> > > information is transferred to E+ heat balance model.
> > > (2) In time step "t+1" E+ calculate the zone temperature based on the
> > > airflow rate information from COMIS and then temp. information is
> > > transferred to COMIS to calcaulte airflow rate.
> > >
> > > Onion iteration
> > > (1) In the timestep "t" E+ and Comis transfer temp and airflow rate
> > > information each other and update them until the residual is below the
> > > converge criteria
> > > (2) If the criteria is satisfied, E+ and Comis starting the calculation
> of
> > > next time step "t+1"
> > >
> > > I don't know what iteration method E+ adopted.
> > >
> > >
> > >
> >
>
>
>
>
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