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[EnergyPlus_Support] Passive Desiccant Wheel



Does anyone know if it is possible to model a passive desiccant wheel?  What I would like to model would be:

Process Air Stream: 

HeatExchanger:AirToAir:SensibleAndLatent -> OutdoorAir:Mixer -> Fan:ConstantVolume -> Coil:Cooling:Water -> HeatExchanger:Desiccant:BalancedFlow -> Coil:Heating:Water

The regeneration air stream for the desiccant wheel would be the relief air stream:

OutdoorAir:Mixer -> HeatExchanger:Desiccant:BalancedFlow -> HeatExchanger:AirToAir:SensibleAndLatent

I have tried several configurations of the regen nodes without any success.  I keep crashing with node errors:

   ** Severe  ** Same component name and type has differing Node Names.
   **   ~~~   **    Component:    HEATEXCHANGER:DESICCANT:BALANCEDFLOW, name=DESICCANT HEAT EXCHANGER
   **   ~~~   **    Nodes, inlet: COOLING COIL OUTLET, outlet: HX PROCESS OUTLET NODE
   **   ~~~   **  & Nodes, inlet: RELIEF AIR OUTLET, outlet: HX REGEN OUTLET NODE
   **   ~~~   **    Node Types:   UNDEFINED & Process Air Nodes
   ** Warning ** Potential Node Connection Error for object HEATEXCHANGER:DESICCANT:BALANCEDFLOW, name=DESICCANT HEAT EXCHANGER
   **   ~~~   **   Node Types are still UNDEFINED -- See Branch/Node Details file for further information
   **   ~~~   **   Inlet Node : COOLING COIL OUTLET
   **   ~~~   **   Outlet Node: HX PROCESS OUTLET NODE
   ** Warning ** Node Connection Error for object HEATEXCHANGER:DESICCANT:BALANCEDFLOW, name=DESICCANT HEAT EXCHANGER
   **   ~~~   **   Process Air Nodes not on any Branch or Parent Object
   **   ~~~   **   Inlet Node : RELIEF AIR OUTLET
   **   ~~~   **   Outlet Node: HX REGEN OUTLET NODE



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