Yes, give it a shot. The evap cooler does not have a water coil so you do not need a controller, just the set point manager as you show. Make sure to list the evap cooler in the OA system equipment list. Equipment should be listed in order from outdoor air node to the mixer inlet node.
On 8/26/2011 3:43 AM, Jean marais wrote:
Hi Group,
The current example files show these coolers working in the supply stream with ODA equipment objects and ODA controllers.
I'm trying to get this to work in the exhaust air stream and propose the following (do I need a controller object? Which would be best?)
AirLoopHVAC:ReturnPath,
AHU Return Path, !- Name
AHU Return Air Outlet, !- Return Air Path Outlet Node Name
AirLoopHVAC:ZoneMixer, !- Component Object Type
AHUAirLoopHVAC:ZoneMixer, !- Controlled Component Name
EvaporativeCooler:Direct:ResearchSpecial, !- Component Object Type
Direct Evap Cooler; !- Controlled Component Name
AirLoopHVAC:ZoneMixer,
AHUAirLoopHVAC:ZoneMixer, !- Name
ZoneMixer Outlet Node, !- Outlet Node Name AHU Return Air Outlet
Underground:Basement Return Outlet, !- Inlet Node Name
PierW%N%E00:PierW%N%E00 Return Outlet, !- Inlet Node Name
PierW%S%E00:PierW%S%E00 Return Outlet, !- Inlet Node Name
PierW%W%E00:PierW%W%E00 Return Outlet, !- Inlet Node Name
PierW%E0Z%E01%E02:PierW%E0Z%E01%E02 Return Outlet, !- Inlet Node Name
PierW%E03:PierW%E03 Return Outlet, !- Inlet Node Name
Hall%E00:Hall%E00 Return Outlet, !- Inlet Node Name
Hll%E0Z%E01%E02%E03%:Hll%E0Z%E01%E02%E03% Return Outlet, !- Inlet Node Name
PavilionN:PavilionN Return Outlet, !- Inlet Node Name
PavilionS:PavilionS Return Outlet; !- Inlet Node Name
EvaporativeCooler:Direct:ResearchSpecial,
Direct Evap Cooler, !- Name
On, !- Availability Schedule Name
0.7, !- Cooler Effectiveness
30.0, !- Recirculating Water Pump Power Consumption
ZoneMixer Outlet Node, !- Air Inlet Node Name
AHU Return Air Outlet, !- Air Outlet Node Name
AHU Return Air Outlet, !- Sensor Node Name
, !- Water Supply Storage Tank Name
0.0, !- Drift Loss Fraction
3; !- Blowdown Concentration Ratio
SetpointManager:Scheduled,
EvapCoolerOutletTemp_SP_Mgr, !- Name
Temperature, !- Control Variable
EvapCoolerOutletTemp_SP_Sch, !- Schedule Name
AHU Return Air Outlet; !- Setpoint Node or NodeList Name
Schedule:Compact,
EvapCoolerOutletTemp_SP_Sch,
Any Number,
Through: 12/31,
For: AllDays,
Until: 06:00, 22,
Until: 20:00, 22,
Until: 24:00, 22;
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad <RRaustad@...> wrote:
>
> That sounds like an evaporative cooler.
>
> On 8/25/2011 11:50 AM, Jean marais wrote:
> >
> > Hi Everyone,
> > I have one large air handler that represents many smaller ones. The
> > current real equipment has a special feature you may find interesting.
> >
> > They humidify the exhaust air at the entry node for the exhaust air
> > just before the thermal wheel. Because the efficiencies of heat
> > transfer for the summer case for the thermal wheel are better for
> > sensible heat than latent heat, the humidified air drops in drybulb
> > temperature whilst the humidity increases.
> >
> > I would like to change the air conditions at this node from whatever
> > it is, to 22 deg C. What's the best way to achieve this? Using EMS or
> > Building in a humidifier lance?
> >
> >
>
> --
> 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
>
-- 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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