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Re: [EnergyPlus_Support] Re: EXAMPLE FILE HELP - "BenchmarkLargeHotelNew_USA_IL_CHICAGO-OHARE.idf"
It depends on your control logic. Beware of both coils turning on and
"fighting" each other if you use the air loop outlet node for control.
Your heating and cooling coil will probably operate at different
temperature set points, so you will typically need 2 control nodes if
you have a heating and cooling coil in your air loop. It's usually
better to place the temperature set point at the coil outlet node. And
if you are going to "schedule" a temperature set point, you will need
some other form of control to meet the zone load (e.g., schedule the air
loop cooling set point and use VAV reheat boxes to meet the zone
temperature set point).
Nuno Costa Brandão wrote:
>
> 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.idf")with similar loop
> 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
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL 32922-5703
Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
UCF - From Promise to Prominence: Celebrating 40 Years
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