[Equest-users] Partial Chilled Water Waterside Economizer

[Jackson Pollock]

Hello all,

I am working on an energy model using EQuest 3.64 of an existing building to
investigate various energy savings options. I would like to include in the
model partial operation of a chilled water loop waterside economizer to
precondition the return chilled water going into the water-cooled chillers.
I've done extensive searching in the Archive and I can't find discussion of
how I could model partial operation. It's clear that the new "waterside
economizer chiller" option is only fully on or fully off and so doesn't show
proper energy savings.

I recall that in the previous EQuest versions one could trick it into
modeling a waterside economizer with a water-cooled chiller that used no
energy. I think I might be able to get EQuest 3.64 to model partial load
waterside economizer operation by changing the loop setpoints of a fake loop
to an approximate average temperature. Does anyone have a link or recall how
you could trick previous versions into modeling waterside economizers via
creation of a fake loop, or another method?

Any direction or comments are appreciated.

Jackson, PE
EDI Inc.
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