how to add parallel components in the AirLoopHVAC:OutdoorAirSystem:EquipmentList

asked 2023-07-18 15:48:50 -0500

Sebastien Brideau
73 ●1 ●4

updated 2023-07-19 17:03:09 -0500

Aaron Boranian

13830 ●76 ●24 http://bigladdersoftware.com/

Hi, I'm new to E+. I'd like to add BIPVT objects upstream of the OutdoorAir:Mixer object to preheat air. I've added the nodes and everything else (I think). My understanding is that I have to add the BIPVT objects in the AirLoopHVAC:OutdoorAirSystem:EquipmentList class. I want to add multiple BIPVT collectors in parallel. How do I do this? Anyone has an example of something similar?

Am I completely off track here?

Thanks

answered 2023-07-26 12:12:29 -0500

rraustad

13599 ●72 ●12 http://www.fsec.ucf.edu/

The objects listed in the AirLoopHVAC:OutdoorAirSystem:EquipmentList, for example:

AirLoopHVAC:OutdoorAirSystem:EquipmentList,
  VAV_1_OA_Equipment,      !- Name
  HeatExchanger:AirToAir:SensibleAndLatent,  !- Component 1 Object Type
  VAV_1 OA Heat Recovery,  !- Component 1 Name
  OutdoorAir:Mixer,        !- Component 2 Object Type
  VAV_1_OAMixing Box;      !- Component 2 Name

are listed in simulation order. For example here the HX would be simulated before the outdoor air mixer so that the OA mixer would know the correct inlet air temperature. The only way I can think to do this would be to use mixers and splitters to create and gather the multiple air streams. The problem is that these mixers and splitters will not be simulated since they would not be listed anywhere in the input file. If a mixer/splitter were allowed in the AirLoopHVAC:OutdoorAirSystem:EquipmentList then that object would be simulated/modeled. Only OA mixers, fans, coils, HXs, VRF TUs, UnitarySystem, CoilSystem, evap coolers, humidifiers, dehumidifiers, and solar collectors are allowed in the OA system equipment list. For now I think you are limited to modeling these object in series or as a single BIPVT object with properties similar to those of the objects you intend to model.