RE: [EnergyPlus_Support] Re: Preconditioning Air to FCU

The Zone object itself is a mixer box like the OA mixer.

The zone has two inlets and tow outlets.

The FCU makes use of one set of these, and the DOAS use the other inlet through a damper.

The inlet air are mixed in the zone. Part goes to the fan coil unit and recycled. The amount from the DOAS is allowed to leave the exhaust node into the environment, to the OA inlet...

Because the DOAS system does not require the returned air to be processed, that is the simple old configuration, before the templates were introduced.

DOAS is just a name. The condo apartment has DOAS to feed the corridors on every floor and exhaust through leaks to apartments, elevator shafts. The air is heated in WInter and cooled in SUmmer.

Each apartment has a FCU. The leak from the door can be the minimum fresh air requirement.

Dr. Li

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: luke.dorna@xxxxxxxxx
Date: Fri, 13 Apr 2012 18:49:02 +0000
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 Behalf Of luke_dorna
> Sent: Friday, April 13, 2012 1:34 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Preconditioning Air to FCU
>
>
>
>
>
> All,
>
> I'm working with dedicated outside air unit providing preconditioned air to
> fan coil units in multiple spaces. I noticed the DOAS with FCU template has
> a line for how to input the air, but the only option is direct to zone, and
> not into the unit.
>
> Does anyone know how or if it is possible to put a DOAS in series with a fan
> coil in order to provide preconditioned outside air to a unit in the space?
>
> Many thanks,
>
> Luke
>

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