[EnergyPlus_Support] About the WindAC

["beyangj" <beyangj@xxxxxxxxxxx>]

Dear,
I'm doing a simulation for a residential building. The window air 
conditioner model in EnergyPlus is "cooling only",  but there need 
heating in the winter in my model, so I chose the 
COIL:ELECTRIC:HEATING for heating, and the 
COIL:DX:CoolingBypassFactorEmpirical is followed by the 
COIL:ELECTRIC:HEATING.
When I set the items as follow,

NODE LIST,
    GAB1Inlets,              !- Node List Name
    GAB1 Heating Coil Outlet Node; !- Node_ID_1

NODE LIST,
    GAB1Exhausts,            !- Node List Name
    GAB1WindACAirInletNode;  !- Node_ID_1

COIL:Electric:Heating,
    GAB1 Heating Coil,       !- Coil Name
    HEAT-SCHED-B1,           !- Available Schedule
    1,                       !- Efficiency of the Coil
    autosize,                !- Nominal Capacity of the Coil {W}
    GAB1WindACAirOutletNode, !- Coil_Air_Inlet_Node
    GAB1 Heating Coil Outlet Node;  !- Coil_Air_Outlet_Node

COIL:DX:CoolingBypassFactorEmpirical,
    GAB1WindACDXCoil,        !- Coil Name
    System Available Schedule-B1,  !- Availability Schedule
    autosize,                !- Rated Total Cooling Capacity (gross) 
{W}
    autosize,                !- Rated SHR
    3.0,                     !- Rated COP
    autosize,                !- Rated Air Volume Flow Rate {m3/s}
    GAB1WindACFanOutletNode, !- Coil Air Inlet Node
    GAB1WindACAirOutletNode, !- Coil Air Outlet Node
    WindACCoolCapFT,         !- Total Cooling Capacity Modifier Curve 
(function of temperature)
    WindACCoolCapFFF,        !- Total Cooling Capacity Modifier Curve 
(function of flow fraction)
    WindACEIRFT,             !- Energy Input Ratio Modifier Curve 
(function of temperature)
    WindACEIRFFF,            !- Energy Input Ratio Modifier Curve 
(function of flow fraction)
    WindACPLFFPLR,           !- Part Load Fraction Correlation 
(function of part load ratio)
    CycFanCycComp;           !- Supply Air Fan Operation Mode

AIR CONDITIONER:WINDOW:CYCLING,
    GAB1WindAC,              !- name of window AC unit
    System Available Schedule-B1,  !- availability schedule
    autosize,                !- maximum air flow rate {m3/s}
    autosize,                !- maximum outside air flow rate {m3/s}
    GAB1WindACAirInletNode,  !- air inlet node
    GAB1WindACAirOutletNode, !- air outlet node
    GAB1WindACOAInNode,      !- outside air node
    GAB1WindACExhNode,       !- air relief node
    GAB1WindACOAMixer,       !- outside air mixer name
    GAB1WindACFan,           !- fan name
    GAB1WindACDXCoil,        !- DX cooling coil name
    CycFanCycComp,           !- operation mode
    blow through,            !- fan placement
    0.001,                   !- Cooling Convergence Tolerance
    COIL:DX:CoolingBypassFactorEmpirical;  !- Cooling coil type

there were such error messages as follow in the ERR file after 
running the IDF file,
 
   ** Severe  ** Error in Node="GAB1 HEATING COIL OUTLET NODE", 
ZoneInlet node did not find an outlet node.
   **   ~~~   ** Reference Object=CONTROLLED ZONE EQUIP 
CONFIGURATION, Name=GAB1
   ************* No node connection errors were found.
   ** Warning ** The following lines are "Orphan Objects".  These 
objects are in the idf
   **   ~~~   **  file but are never obtained by the simulation and 
therefore are NOT used.
   **   ~~~   **  See InputOutputReference document for more details.
   ************* Object=COIL:ELECTRIC:HEATING=GAB1 HEATING COIL
 
I just found the item definitions in Air Conditioner:Window:Cycling 
are that the air inlet node should be one of the zone exhaust nodes 
for the zone which the window air conditioner is cooling, and the air 
outlet node should be one of the inlet air nodes for the zone which 
is being cooled. I wondered whether I can add the 
COIL:ELECTRIC:HEATING to the window air conditioner system. If so, 
how can I connect them?  Thanks in advance!

Best,

Stewart





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