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[EnergyPlus_Support] Re: About the WindAC
Dear Don,
Thank you very much for your reply. I have looked at the example
file FurnaceWithDXSystem.idf. It can be used for residential
heating/cooling,but it involves an air distribution system. The air
distribution system is not common in Hong Kong, how can I model
residential cooling/heating with electric heating coil without an
air distribution system?
Best,
Stewart
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "donbshireyiii"
<shirey@f...> wrote:
> Stewart:
>
> As you have found, the window air conditioner object can only
provide
> cooling, not heating. If you look at the WindACAuto.idf example
file,
> you see that baseboard heating is used along with the window air
> conditioner in this particular example file.
>
> A packaged terminal heat pump object will be added in a future
version
> (Fall 2005 or Spring 2006) which will allow both cooling and
heating.
>
> In the meantime, I suggest that you look at the example file
> FurnaceWithDXSystem.idf. You can use a FURNACE:BLOWTHRU:HEATCOOL
> object in a air loop to model cooling with the
> COIL:DX:CoolingBypassFactorEmpirical and you can specify
> COIL:ELECTRIC:HEATING for heating.
>
> Don
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "beyangj" <beyangj@h...>
> wrote:
> > 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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