Nuno,
Actually, I think it would be more “correct”
if the cooling coil’s Controller:Simple object’s control node was
changed to the coiling coil outlet node (right now it is pointing to the supply
side outlet node like you say).
Although I would not adopt as a rule of
thumb, this does work out to be okay here because the Controller:Simple object
is general enough that it can account for the fan component’s energy
coming in between the coil outlet and the control node; this has the effect of doing
what the mixed air set point manager would do otherwise. It is better practice
to use the coil outlets for control to avoid different coils fighting each
other. It would be easier to understand if the coil outlet was used as the
control node and the mixed air set point manager was actually doing something
here.
Thanks for catching this, we’ll get
them fixed for the next round.
From:
Sent: Monday, August 11, 2008
11:53 AM
To:
Subject: [EnergyPlus_Support] Re:
EXAMPLE FILE HELP - "BenchmarkLargeHotelNew_USA_IL_CHICAGO-OHARE.idf"
Hi Richard,
Following the last post, so since both the heating coil and cooling
coil have their one temperature setpoints defined at their individual
outlet nodes, it´s indifferent whether the "control node" for the
cooling coil is referred to the outlet air node, or the outlet air
loop node?
In other example files ("5zoneWaterSystems
structure, both controllers have their control node referred to the
outlet air loop node, can I assume this procedure as a "thumb rule"
procedure? i.e. Always refer the cooling and heating coils control
nodes to the "air loop outlet node"?
Thank you very much for your help
Nuno
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