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[EnergyPlus_Support] Re: CV AHU and Secondary FCU in Zone
Richard
This is excellent. I got it working for a single zone model! I will
attempt to take the same ideas into the larger model I have, only
about 10 zones so shouldn't be too difficult. The one thing that
through me for a loop was setting up a NodeList for the Supply Inlet
to the Zone since when the connections were expanded both the FCU and
the outlet from the VAV had the same name for the Supply to the Zone.
Assuming i did this correctly because i received 0 warnings.
The help was greatly appreciated.
Does anyone see any reason why I shouldnt be using a VAV terminal to
simulate a CAV even though I have damper min at 1.0 it acts the same,
yes? Didn't know if there was any advantage to the other CV terminals.
Thanks again!!
-
aj
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, RRaustad@... wrote:
>
> I believe both the airloop VAV system and zone FCU have templates that
> will expand the connections for you. The VAV system and FCU will each
> have their own zone inlet node. The VAV system will connect to the
> zone through the RA node and the FCU will connect through a zone
> exhaust node.
>
> You are on the right track. Again, set this up for a single zone and
> get it working first. If you have other questions and need for use to
> look at the input file, it's much easier for us to review a one-zone
> model.
>
> Quoting Alan Jackson <alanjackson7@...>:
>
> > Couple of questions because I am running into some issues. The first
> > is can all this be done with the HVAC templates and if so which ones?
> >
> > The way I have started is to set up a HVACTemplate:Zone:VAV and
> > System:VAV and set all the minimum and maximums the same and have no
> > turndown on the VAV. This was my understanding on how to get a CAV
> > system from the template. Is this right? should i be using
> > AirTerminal:SingleDuct:ConstantVolume:Reheat or Uncontrolled instead?
> >
> > Then I am going into the expanded idf and trying to add a
> > ZoneHVAC:FourPipeFanCoil manually, but there are object parameters for
> > outdoor air which i don't have because it is just recirculating the
> > zone air. Also it seems like the outlet from the VAV/CAV is the same
> > node as the outlet for the fan coil, which is the zone inlet. I
> > thought zones could have only one air inlet and outlet
> >
> > Can you see where I am going with this. Looking for a little more
> > direction.
> >
> > I do appreciate the help
> >
> > -
> > aj
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
> > <RRaustad@> wrote:
> >>
> >> You can have both. Start with a 1 zone model first. Autosizing the
> >> equipment will size each to meet the total zone load, so after the
> > first
> >> run, manually size the systems as appropriate for your application.
> >>
> >> Alan Jackson wrote:
> >> >
> >> > Sorry to bring this up again but did not get any response the
initial
> >> > go around. I would like to model a CV air system supplying
ventilation
> >> > and cooling to a zone that also has perimeter recirculation console
> >> > FCUs. Do I need to have a seperate perimeter zone just for the
FCUs or
> >> > can I have both CV and FCU in the same zone using direct air or
> >> > something like that.
> >> >
> >> > I just don't want to go back and have to add perimeter zones after
> >> > finding out it doesn't work, otherwise i would just attempt it
myself.
> >> >
> >> > thanks in advance
> >> >
> >> > -
> >> > aj
> >> >
> >> >
> >>
> >> --
> >> Richard A. Raustad
> >> Senior Research Engineer
> >> Florida Solar Energy Center
> >> University of Central Florida
> >> 1679 Clearlake Road
> >> Cocoa, FL 32922-5703
> >> Phone: (321) 638-1454
> >> Fax: (321) 638-1439 or 1010
> >> Visit our web site at: http://www.fsec.ucf.edu
> >>
> >> UCF - From Promise to Prominence: Celebrating 40 Years
> >>
> >
> >
> >
>
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