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Re: [EnergyPlus_Support] Heat exchanger and outdoor air error
The error means that the node is not "connected" to another node.
Although it appears you have connected the HX to the node, you probably
did not set up other objects to tell E+ that the HX was part of the
outside air system.
Did you list the HX in the outside air system equipment list? Look at
the example file to see what other objects are required to properly
model the HX.
Example from TermRhGenericOAHeatRecMinExh.idf:
AirLoopHVAC:OutdoorAirSystem:EquipmentList,
OA Sys 1 Equipment, !- Name
HeatExchanger:AirToAir:SensibleAndLatent, !- Component 1 Object Type
OA Heat Recovery 1, !- Component 1 Name
OutdoorAir:Mixer, !- Component 2 Object Type
OA Mixing Box 1; !- Component 2 Name
Humphrey, Neal wrote:
>
> I have a functioning HVAC system with an outdoor air mixer set up, and
> I’m trying to add a heat recovery heat exchanger object to it. To try
> to do this, I added the heat exchanger object with the ‘Supply Air
> Inlet Node Name’ of “Outside Air Inlet Node 3”, and the Supply Air
> Outlet Node Name as the node which was previously the outdoor air
> stream node for my mixing box. I then switched the controller to
> control based on the “Outside Air Inlet Node 3” (actuator field),
> previously the mixing box outdoor node. I added this to the list of
> outdoor air nodes. However, I keep getting this error:
>
> ** Severe ** Node Connection Error, Node="OUTSIDE AIR INLET NODE 3",
> Actuator node did not find a matching node of appropriate type (other
> than Actuator, Sensor, OutsideAir).
>
> ** ~~~ ** Reference Object=CONTROLLER:OUTDOORAIR, Name=VAV_3_OA_CONTROLLER
>
> ************* There was 1 node connection error noted.
>
> ** Fatal ** Previous Conditions cause program termination.
>
> Does anyone have any input on how to track down this connection error,
> or is there some object or change that I’m missing in adding this heat
> exchanger? Thanks,
>
> NEAL HUMPHREY
>
> **ICF International** | //B////UILDING//// E////NERGY//// A//
>
> //1655 Fort Myer Drive, Suite 600//
>
> //Arlington, VA 22209//
>
> //Phone: 703.373.6635//
>
> //_www.icfi.com/buildings_ __//
>
> // //
>
> // //
> // //
> ////
> // //
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
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