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[EnergyPlus_Support] Re: Pretreating Outside Air

Thanks Richard, but E+ is still crashing.  Here is what I added/changed beyond the normal air loop.  (I also added the schedule for the set point and the performance curves).  Did I overlook something?

Coil:Cooling:DX:SingleSpeed,
    Top Core Precool Coil,   !- Name
    ALWAYS_ON,               !- Availability Schedule Name
    AUTOSIZE,                !- Rated Total Cooling Capacity {W}
    AUTOSIZE,                !- Rated Sensible Heat Ratio
    4.56651,                 !- Rated COP
    AUTOSIZE,                !- Rated Air Flow Rate {m3/s}
    Top Core Outdoor Air,    !- Air Inlet Node Name
    Top Core Treated Outdoor Air,  !- Air Outlet Node Name
    PSZ-AC:1_CoolCStandard10Ton_CapFT,  !- Total Cooling Capacity Function of Temperature Curve Name
    PSZ-AC:1_CoolCStandard10Ton_CapFF,  !- Total Cooling Capacity Function of Flow Fraction Curve Name
    PSZ-AC:1_CoolCStandard10Ton_EIRFT,  !- Energy Input Ratio Function of Temperature Curve Name
    PSZ-AC:1_CoolCStandard10Ton_EIRFFF,  !- Energy Input Ratio Function of Flow Fraction Curve Name
    PSZ-AC:1_CoolCStandard10Ton_PLR,  !- Part Load Fraction Correlation Curve Name
    ContinuousFanWithCyclingCompressor;  !- Supply Air Fan Operating Mode

AirLoopHVAC:UnitaryCoolOnly,
    Top Core Precool Sys,    !- Name
    ALWAYS_ON,               !- Availability Schedule Name
    Top Core Outdoor Air,    !- DX Cooling Coil System Inlet Node Name
    Top Core Treated Outdoor Air,  !- DX Cooling Coil System Outlet Node Name
    Top Core Treated Outdoor Air,  !- DX Cooling Coil System Sensor Node Name
    Coil:Cooling:DX:SingleSpeed,  !- Cooling Coil Object Type
    Top Core Precool Coil,   !- Cooling Coil Name
    None,                    !- Dehumidification Control Type
    Yes,                     !- Run on Sensible Load
    No;                      !- Run on Latent Load

AirLoopHVAC:OutdoorAirSystem:EquipmentList,
    Top Core OA Equipment,   !- Name
    AirLoopHVAC:UnitaryCoolOnly,  !- Component 1 Object Type
    Top Core Precool Sys,    !- Component 1 Name
    OutdoorAir:Mixer,        !- Component 2 Object Type
    Top Core Mixing Box;     !- Component 2 Name

OutdoorAir:Mixer,
    Top Core Mixing Box,     !- Name
    Top Core Mixed Air,      !- Mixed Air Node Name
    Top Core Treated Outdoor Air,  !- Outdoor Air Stream Node Name
    Top Core Relief Air,     !- Relief Air Stream Node Name
    Top Core Return Air;     !- Return Air Stream Node Name

SetpointManager:Scheduled,
    Top Core OA Pretreat,    !- Name
    Temperature,             !- Control Variable
    OA Pretreat Sched,       !- Schedule Name
    Top Core Treated Outdoor Air;  !- Setpoint Node or NodeList Name


Thanks again; I would appreciate any help.





--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad <RRaustad@...> wrote:
>
> Use the AirLoopHVAC:UnitaryCoolOnly object in the place where you put 
> the DX cooling coil. The DX coil is part of the 
> AirLoopHVAC:UnitaryCoolOnly object. Control it with a scheduled set 
> point manager.
> 
> superbluescooter24 wrote:
> >  
> >
> > Hey,
> > I'm trying to condtion outside air before it reaches the mixing box of 
> > the air loop. Is there any way to accomplish this with a DX cooling 
> > coil? After trying to add a Coil:Cooling:DX:SingleSpeed before the 
> > outdoor air stream of the mixing box, E+ crashed. Any advice?
> > Thanks!!!
> >
> > 
> 
> -- 
> 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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