I am trying to set up an air loop with two coils between the outdoor air node and the inlet to the heat exchanger, as shown in the image below.
Can I add coils before the OAM or does it need outdoor air?
You can add coils before OAM (OutdoorAir:Mixer). You can refer to the ExampleFile: TermRhGenericOAHeatRecPreheat.idf in your PC.
The order of componets in the ExampleFile is
(Outdoor air) -> Preheat coil -> HEX -> OAM -> Fan -> Cooling coil
The preheat coil and the HEX are listed in AirLoopHVAC:OutdoorAirSystem:EquipmentList.
AirLoopHVAC:OutdoorAirSystem:EquipmentList,
OA Sys 1 Equipment, !- Name
Coil:Heating:Electric, !- Component 1 Object Type
Outdoor Air Preheat Coil,!- Component 1 Name
HeatExchanger:AirToAir:SensibleAndLatent, !- Component 2 Object Type
OA Heat Recovery 1, !- Component 2 Name
OutdoorAir:Mixer, !- Component 3 Object Type
OA Mixing Box 1; !- Component 3 Name
The fan and the cooling coil are listed in Branch.
Branch,
Air Loop Main Branch, !- Name
, !- Pressure Drop Curve Name
AirLoopHVAC:OutdoorAirSystem, !- Component 1 Object Type
OA Sys 1, !- Component 1 Name
Air Loop Inlet Node, !- Component 1 Inlet Node Name
Mixed Air Node, !- Component 1 Outlet Node Name
Fan:ConstantVolume, !- Component 2 Object Type
Supply Fan 1, !- Component 2 Name
Mixed Air Node, !- Component 2 Inlet Node Name
Cooling Coil Air Inlet Node, !- Component 2 Outlet Node Name
Coil:Cooling:Water:DetailedGeometry, !- Component 3 Object Type
Detailed Cooling Coil, !- Component 3 Name
Cooling Coil Air Inlet Node, !- Component 3 Inlet Node Name
Air Loop Outlet Node; !- Component 3 Outlet Node Name
Thank you, I didn't realise I could include the coil in the OutdoorAirSystem object.
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