Re: [EnergyPlus_Support] Can Unit Ventilator be modeled parallel to a furnace in an air loop?

[Fred Buhl <wfbuhl@xxxxxxx>]

It seems to me that what you are trying to do should be possible - multiple
zone equipments are allowed. Let us take a look at your original 
configuration
and see if we can spot a problem.

Fred Buhl

Ryan wrote:
> Hello,
> I am trying to model an existing system that has a roof top dx coil 
> air conditioner serving a zone for the cooling only and a hot water 
> loop serving each zone with small fan coil units in each room.  My 
> original idea was to model the air conditioning system with a 
> furnace:heatcool using a coil:DX:cooling, a coil:electric:heating set 
> to have no capacity and a Fan:onoff in an air loop with a direct air 
> component in the zone equipment side.  To model the heating system I 
> was using a Unit Ventilator with no cooling coil, a 
> coil:water:simpleheating, and a fan:constvolume.  The unit ventilator 
> is also be zone equipment (which seems to be a problem).
>
> What i am having trouble with is this does not seem to be possible to 
> have the two systems set up this way as i can only have one zone 
> equipment.
>
> My question:  Is it possible to set the system up to have the unit 
> ventilator and furnace:heatcool set up in a parallel air loop 
> configuration and then the zone equipment is the direct air component 
> only?
>
> Part of the reason i am doing it this way is I want to be able to set 
> different fan efficiencies as well as to have the cooling coil 
> available at different times than the heating system (ie partial 
> overlap of availabilities).
>
> Question 2:  is there a better way to set this up?
>
> Thanks
> Ryan
>
>
>
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