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Re: [EnergyPlus_Support] Re: Invalid air loop component
What you describe is nearly the same as how the branch list is laid out
in the 5ZoneAutoDXVAV file previously mentioned.
BRANCH,
VAV Sys 1 Main Branch, !- Branch Name
autosize, !- Maximum Branch Flow Rate {m3/s}
OUTSIDE AIR SYSTEM, !- Comp1 Type
OA Sys 1, !- Comp1 Name
VAV Sys 1 Inlet Node, !- Comp1 Inlet Node Name
Mixed Air Node 1, !- Comp1 Outlet Node Name
PASSIVE, !- Comp1 Branch Control Type
DXSystem:AirLoop, !- Comp2 Type
DX Cooling Coil System 1,!- Comp2 Name
Mixed Air Node 1, !- Comp2 Inlet Node Name
Main Cooling Coil 1 Outlet Node, !- Comp2 Outlet Node Name
PASSIVE, !- Comp2 Branch Control Type
COIL:Gas:Heating, !- Comp3 Type
Main Heating Coil 1, !- Comp3 Name
Main Cooling Coil 1 Outlet Node, !- Comp3 Inlet Node Name
Main Heating Coil 1 Outlet Node, !- Comp3 Outlet Node Name
PASSIVE, !- Comp3 Branch Control Type
FAN:SIMPLE:VariableVolume, !- Comp4 Type
Supply Fan 1, !- Comp4 Name
Main Heating Coil 1 Outlet Node, !- Comp4 Inlet Node Name
VAV Sys 1 Outlet Node, !- Comp4 Outlet Node Name
ACTIVE; !- Comp4 Branch Control Type
JV Dirkes II wrote:
>
> Dear Don,
>
> Taking another tack, is it correct to think of the DXsystem object
> just like any other air loop object, and place it in a Branch like this?
>
> Component 1: OUTSIDE AIR SYSTEM,
> Component 2: DXsystem:AirLoop
> Component 3: FAN:SIMPLE:VARIABLEVOLUME,
> Component 4: COIL:WATER:SIMPLEHEATING,
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, Don Shirey <shirey@...>
> wrote:
> >
> > There may be other ways to do this, but here is my suggestion:
> >
> > Use DXSystem:AirLoop for the cooling coil and fan, with a Single
> > Duct:VAV:Reheat air distribution unit that uses
> COIL:Water:SimpleHeating
> > as the reheat component object.
> >
> > See example file = 5ZoneAutoDXVAV.idf which is similar to what you are
> > looking for, but that example file uses gas reheat coils instead of hot
> > water reheat coils.
> >
> > JV Dirkes II wrote:
> > > Dear Don,
> > >
> > > Following up on your suggestion, I have uncovered a couple more
> questions:
> > > The Unitary System or Furnace system are geared toward single zone
> > > applications (they require a controlling zone"), so they are less
> > > applicable to my multi-zone requirement.
> > > I want to model a Terminal reheat system (ASHRAE 90.1 Baseline system
> > > #5) with a DX coil and hot water coil which maintain a constant
> > > discharge air temperature. The DXsystem: object lacks a heating coil,
> > > though, and I'm now trying to figure out how to add that into the air
> > > loop.
> > > It occurs to me that I could let E+ autosize a (relatively) monster
> > > reheat coil, but I'd rather get it to emulate the real system. Any
> > > guidance for adding that heating coil to the air loop?
> > >
> > > Thanks!
> > >
> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, Don Shirey <shirey@> wrote:
> > >
> > >> In an air loop, this DX cooling coil must be included as part of
> > >>
> > > another
> > >
> > >> "compound component" that controls how the DX coil operates.
> > >>
> > >> For example, the DX cooling coil could be part of
> DXSystem:AirLoop
> > >> or UnitarySystem:HeatCool
> > >>
> > >> JV Dirkes II wrote:
> > >>
> > >>> Dear E+ Forum,
> > >>>
> > >>> I'm getting an error which tells me that my coil is an invalid
> > >>> component. I doubt that this is really the cause of the error. Can
> > >>> someone give a suggestion regarding the cause? Thanks!
> > >>>
> > >>> ** Severe ** Invalid Air Loop Component
> > >>> Type="COIL:DX:COOLINGBYPASSFACTOREMPIRICAL".
> > >>> ** ~~~ ** ..Air Loop Component Name="CLGCOIL_AH1".
> > >>> ** ~~~ ** ..Air Primary Loop=AIRLOOP_AH1
> > >>> ** ~~~ ** ..Air Primary Loop Branch=BRANCH_AIRLOOP_AH1
> > >>> ** Fatal ** Errors found getting Air Primary Loop
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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Visit our web site at: http://www.fsec.ucf.edu
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