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Re: [EnergyPlus_Support] Re: question about node connection
In order for an object to be simulated, it must be listed on a
branch, an air loop equipment list, or a compound object (such as the
desiccant dehumidifier, furnace, fan coil, etc.). There are some
known issues related to node connection errors in the outside air
system which we need to fix.
Adding these fans to the AIR LOOP EQUIPMENT LIST is the appropriate
thing to do. Note that the sequence of these objects in the list is
the order in which they will be simulated. For the best results,
list them in the order that the process air will will see them. If
this still generates node connection errors, please send me the file.
Mike
On 18 Jul 2003, at 12:48, zhaicq98 wrote:
> But I am still not sure in which objects I should put the exhaust fan
> and the process air fan...
>
> Thank you,
> Chaoqin
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, tcornell@g... wrote:
> > Chaoqin,
> >
> > Regen air fields, including the regen fan, are defined in the
> > desiccant dehumidifier module, while relief air fields are defined
> in
> > the heat exchanger module.
> >
> >
> >
> > On 17 Jul 2003 at 17:36, zhaicq98 wrote:
> >
> > > In my system, the outside air first goes through an air to air
> heat
> > > exchanger where it changes sensible and latent heat with the
> building
> > > relief air as well as a solid desiccant wheel before it enters
> into
> > > the outside air mixer. I know this system is very similar to the
> > > example file DesiccantCVRh.idf and acturally I created my input
> file
> > > according to this example. The difference is that except the
> > > regeneration fan there is a fan drawing the process air through
> the
> > > heat exchanger and desiccant wheel and another fan drawing the
> > > building relief air through the heat exchanger.
> > >
> > > My question is in which branches or objects I should put these two
> > > fans. First, I did not add them to any objects, and then I got the
> > > warning messages that said "node connection error, air node not
> on any
> > > branch or parent object". Then add them in the AIR LOOP EQUIPMENT
> > > LIST, together with the air to air heat exchanger and solid
> desiccant
> > > wheel, as well as the outside air mixer. The warning messages
> remain
> > > the same.
> > >
> > > Can anyone tell me where I should add this two fans?
> > >
> > > Thanks,
> > > Chaoqin
> > >
> > >
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> > >
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> > >
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> >
> >
> > Terry L. Cornell, CEM, CDSM
> > Principal
> > GARD Analytics, Inc.
> > 1028 Busse Highway
> > Park Ridge, IL 60068-1802
> > Phone: 847/698-5689 Fax: 847/698-5600
> > E-Mail: tcornell@g...
> > Internet: http://www.gard.com
>
>
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