[EnergyPlus_Support] Re: Full Fresh Air system with heat recovery and NO heating or cooling coils in loop

["Elmer Morrissey" <elmofuddly@xxxxxxxxx>]

Hi Fred,

I've set my OA controller to the following..

CONTROLLER:OUTSIDE AIR,
    AHU1 OA Controller,      !- Name
    NO ECONOMIZER,           !- EconomizerChoice
    NO RETURN AIR TEMP LIMIT,!- ReturnAirTempLimit
    NO RETURN AIR ENTHALPY LIMIT,  !- ReturnAirEnthalpyLimit
    NO LOCKOUT,              !- Lockout
    PROPORTIONAL MINIMUM,    !- MinimumLimit
    AHU1 Supply Fan Inlet Node,  !- Control_Node
    AHU1 OA Inlet Node,      !- Actuated_Node
    0.21,                     !- minimum outside air flow rate {m3/s}
    0.21,                    !- maximum outside air flow rate {m3/s}
    19,                      !- temperature limit {C}
    4,                       !- temperature lower limit {C}
    0,                       !- enthalpy limit {J/kg}
    AHU1 MB Relief Air  Outlet Node,  !- Relief_Air_Outlet_Node
    AHU1 Extract Fan Outlet Node;  !- Return_Air_Node

Do I need an econmizer for what I am proposing to do? 

What would be the correct course of action in order to remove my 
error for the fatal error described below that seems to insist on a 
Controller:Simple even though I do not have a heating coil or a 
cooling coil? Do I need to insert a fake cooling coil with dummy 
controls?

Kind regards

-Elmer

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, fred buhl <wfbuhl@l...> 
wrote:
>
> You'll need to pretend that the system is a recirc system with 
outside 
> air - ie a normal
> VAV system. You will need to set the minimum OA to the total flow 
rate. 
> The heat recovery
> unit will be in the OA system. Probably need to set MinimumLimit 
to 
> Proportional Minimum
> in the controller:outside air.
> 
> Fred Buhl
> 
> Elmer Morrissey wrote:
> 
> >Hello all,
> >
> >Has anyone modelled a Single Duct VAV system that takes full 
fresh 
> >air which moderates all zonal loads through a heat recovery unit 
> >only?
> >
> >I received this fatal error?
> >
> >   **  Fatal  ** ManageControllers: Invalid controller=AHU1 OA 
> >CONTROLLER. The only valid controller type for an Air Primary 
Loop 
> >is CONTROLLER:SIMPLE.
> >   ************* Fatal error -- final processing.  More error 
> >messages may appear.
> >
> >I don't have a CONTROLLER:SIMPLE because my AHU does NOT contain 
a 
> >cooling coil or a heating coil. The facility's system designers 
> >expect the rotary wheel will moderate all sensible and latent 
loads 
> >in their entirety. 
> >
> >Does anyone have any ideas how I could emulate such a system?
> >
> >Does anyone have an example file of a FULL fresh air system with 
NO 
> >recirc air?
> >
> >Kind regards
> >
> >-Elmer
> >
> >
> >
> >
> >
> >
> >The primary EnergyPlus web site is found at:
> >http://www.energyplus.gov
> >
> >The group web site is:
> >http://groups.yahoo.com/group/EnergyPlus_Support/
> >
> >Attachments are not allowed -- please post any files to the 
appropriate folder in the Files area of the Support Web Site.
> >
> >EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf 
and press the "search" button.
> > 
> >Yahoo! Groups Links
> >
> >
> >
> > 
> >
> >
> >  
> >
>







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