[EnergyPlus_Support] Detailed Cooling Coil Fatal Error

["Elmer Morrissey" <elmofuddly@xxxxxxxxx>]

Dear all,

I'm using the detailed cooling coil for a simulation. However I get
the following warning which leads to a fatal error

   ** Warning ** Calculated design heating load for zone=TESTZONE is zero.
   **   ~~~   ** Check ZONE SIZING and ZONE CONTROL:THERMOSTATIC inputs.
   ************* Beginning System Sizing Calculations
   ************* Beginning Plant Sizing Calculations
   ** Severe  ** InitWaterCoil: Detailed Flat Fin Coil,
TubetoFinDiamRatio > 1.0, [2.2856]

The input for the run looks as follows:

COIL:Water:DetailedFlatCooling,
    AHU2 CC,                 !- Coil Name
    PlantAvailSched,         !- Available Schedule
    0.006646,                !- Max Water Flow Rate of Coil {m3/s}
    autosize,                !- Tube Outside Surf Area {m2}
    autosize,                !- Total Tube Inside Area {m2}
    autosize,                !- Fin Surface Area {m2}
    autosize,                !- Minimum Air Flow Area {m2}
    autosize,                !- Coil Depth {m}
    autosize,                !- Fin Diameter {m}
    0.0015,                  !- Fin Thickness {m}
    0.01445,                 !- Tube Inside Diameter {m}
    0.0159,                  !- Tube Outside Diameter {m}
    0.386,                   !- Tube Thermal Conductivity {W/m-K}
    0.204,                   !- Fin Thermal Conductivity {W/m-K}
    0.0018,                  !- Fin Spacing {m}
    0.026,                   !- Tube Depth Spacing {m}
    4,                       !- Number of Tube Rows
    autosize,                !- Number of Tubes per Row
    CW:CC:WaterInletNode,    !- Coil_Water_Inlet_Node
    CW:CC:WaterOutletNode,   !- Coil_Water_Outlet_Node
    AirNode4,                !- Coil_Air_Inlet_Node
    AirNode5;                !- Coil_Air_Outlet_Node   

As you can see, the input is taken from the default settings with the
object with 90% of the fields being autosized. Does anyone have any
thoughts?

Kind regards

-Elmer

PS the autosizing parameters:

ZONE SIZING,
    TestZone,                !- Name of a zone
    11.5,                    !- Zone cooling design supply air
temperature {C}
    16.5,                    !- Zone heating design supply air
temperature {C}
    0.0065,                  !- Zone cooling design supply air
humidity ratio {kg-H2O/kg-air}
    0.0065,                  !- Zone heating design supply air
humidity ratio {kg-H2O/kg-air}
    flow/person,             !- outside air method
    0.00944,                 !- outside air flow per person {m3/s}
    ,                        !- outside air flow per zone {m3/s}
    1,                       !- zone sizing factor
    design day,              !- cooling design air flow method
    ,                        !- cooling design air flow rate {m3/s}
    design day,              !- heating design air flow method
    ;                        !- heating design air flow rate {m3/s}


!-   ===========  ALL OBJECTS IN CLASS: SYSTEM SIZING ===========

SYSTEM SIZING,
    AHU2:PrimaryAirLoop,     !- name of an AIR PRIMARY LOOP object
    sensible,                !- type of load to size on
    6,                       !- Design (minimum) outside air
volumetric flow rate {m3/s}
    1,                       !- minimum system air flow ratio
    4,                       !- Preheat design set temperature {C}
    11.5,                    !- Central cooling design supply air
temperature {C}
    16.5,                    !- Central heating design supply air
temperature {C}
    noncoincident,           !- Sizing Option
    no,                      !- Cooling 100% Outside Air
    no,                      !- Heating 100% Outside Air
    0.0065,                  !- Central cooling design supply air
humidity ratio {kg-H2O/kg-air}
    0.0065,                  !- Central heating design supply air
humidity ratio {kg-H2O/kg-air}
    design day,              !- cooling design air flow method
    ,                        !- cooling design air flow rate {m3/s}
    design day,              !- heating design air flow method
    ;                        !- heating design air flow rate {m3/s}





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