[Equest-users] An eQUEST output question.

R B slv3sat at gmail.com
Mon Oct 10 17:33:24 PDT 2011

For the VFD to take effect, the cooling coil valve has to be two-way.
Default in eQuest is three-way. See if that is the issue.

On Mon, Oct 10, 2011 at 6:20 PM, Kazim Mirza <mirzkazim9 at gmail.com> wrote:

> Hello All,
>              Here is a "sim" output from the hospital bldg I am modelling.
> The secondary CHW pump has a VFD on it and I would think that the flow would
> be proportional to speed and the pump would spent some time in the lower
> load ranges rather being in > 80% load range.
> (*Although I do not know as to how eQUEST comes up with the speed to match
> with flows - my presumption being that the flows are being derived from the
> loads and delta-T. The constant speed pumps cycles on and off to get deliver
> the load and VFD equipped pump varies the speed of the pump to regulate the
> flow to satisfy the load*)
> Why is the speed hours not consistent with the flow hours? I am also
> not limiting the speed of the pump in any way to below 80% range.
> Please advise.
> Thanks in Advance,
> Kazim Mirza
> Energy Engineer
> EMCOR Energy Services
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