[EnergyPlus_Support] Circulation-only Fans: Zone Equipment?

["Kristin Field" <fieldkm@xxxxxxxxx>]

Hi, I'm trying to model a set of greenhouses that are heated only with
fin tube radiators.  The only "cooling" is through natural ventilation
and intake fans, which I have modeled using AirFlow objects.  I don't
have a question about this part of the model, just providing this
info. as background.

The question I have is about modeling the circulation fans that run
continuously in the greenhouse.  I thought of doing them as zone
equipment, but the I/O Reference lists the types of zone equipment
allowed, and plain "fans" are not among them.  Another option I
considered is modeling them as unit heaters with the heating cool
never enabled, but I was hoping for an easier solution.  The cfm is
high and, I would think, will have a big effect of the convection part
of the heat balance.  Without the effect on convection, I would
otherwise just input the fan heat as an electric internal gain.

Any thoughts?

Thanks,
Kristin Field



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