It is not going to work to connect the air loop to the back of the fan coil units, but there is development work going on to allow doing that in the future.
One option to consider is using the AirTerminal:SingleDuct:ConstantVolume:FourPipeInduction object with the supply air run like a DOAS.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of luke_dorna
Sent: Friday, April 13, 2012 12:49 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Preconditioning Air to FCU
I looked through the example file list. There is both a DOAS with FCU and a DOAS with WSHP. However, both of them have OA into zone instead of into the zone unit.
I thought about attempting to connect the DOAS outlet into the FCU mixing box, but putting a node that isn't an outdoorair:node on the outdoor air inlet would probably kick back an error.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jim Dirkes" <jim@...> wrote:
>
> There's not really much difference thermodynamically, Luke.
>
> You've got me thinking, though. I wonder if you can connect the DOAS outlet
> via splitter to the Fan coil OA inlet? Have you looked for any example
> files which do this?
>
>
>
> The Building Performance Team
> James V. Dirkes II, P.E., BEMP , LEED AP
> 1631 Acacia Drive NW
> Grand Rapids, MI 49504
> 616 450 8653
>
>
>
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On B
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