You are correct, the outdoor air mixer is integral to the PTAC and a HX cannot be included at this time. Yes, in addition to the PTAC, you can include a ZoneHVAC:EnergyRecoveryVentilator to provide outdoor air using energy recovery to the same zone, however, this is not exactly what you intend to model since the inlet conditions to the PTAC coils will not be affected by the heat exchanger. You can model this using an air loop (AirloopHVAC) with the HX in the outside air system. One air loop per zone will be the same as one PTAC per zone, but with the air loop you can include the HX.
On 9/15/2010 3:27 AM, Xavier Garcia Casals wrote:
Hi,
Which is the best way for introducing a HeatExchanger when using ZoneHVAC:PackagedTerminalAirConditioner?
The ZoneHVAC:PackagedTerminalAirConditioner manages an OutdoorAir:Mixer, that is the object where a HeatExchanger could be integrated. However, the ZoneHVAC:PackagedTerminalAirConditioner object internally implements the functinons of the Controller:OutdoorAir and AirLoopHVAC:OutdoorAIrSystem:EquipmentList objects, which should also interact with the HeatExchanger object, and therefore I am afraid that the model is not flexible enough to incorporate a HeatExchanger object. Is it right?
Is the only possibility to introduce an addicional ZoneHVAC:EnergyRecoveryVentilator duplicating the zone equipment?
Thanks,
--
Xavier García Casals
-- Richard A. Raustad Senior Research Engineer Florida Solar Energy Center University of Central Florida 1679 Clearlake Road Cocoa, FL 32922-5703 Phone: (321) 638-1454 Fax: (321) 638-1439 or 1010 Visit our web site at: http://www.fsec.ucf.edu UCF - From Promise to Prominence: Celebrating 40 Years
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