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Re: [EnergyPlus_Support] On Off Fan Performance Curves
See the PackagedTerminalHeatPump example file:
Fan:OnOff,
Zone1PTHPFan, !- Name
FanAndCoilAvailSched, !- Availability Schedule Name
0.5, !- Fan Efficiency
75.0, !- Pressure Rise {Pa}
0.6, !- Maximum Flow Rate {m3/s}
0.9, !- Motor Efficiency
1.0, !- Motor In Airstream Fraction
Zone1PTHPOAMixerOutletNode, !- Air Inlet Node Name
Zone1PTHPFanOutletNode, !- Air Outlet Node Name
FanPowerRatioCurve, !- Fan Power Ratio Function of Speed Ratio
Curve Name
FanEffRatioCurve; !- Fan Efficiency Ratio Function of Speed
Ratio Curve Name
Curve:Cubic,
FanEffRatioCurve, !- Name
0.33856828, !- Coefficient1 Constant
1.72644131, !- Coefficient2 x
-1.49280132, !- Coefficient3 x**2
0.42776208, !- Coefficient4 x**3
0.5, !- Minimum Value of x
1.5, !- Maximum Value of x
0.3, !- Minimum Curve Output
1.0; !- Maximum Curve Output
! Curve = C1 + C2*x**C3, x = fan speed ratio
Curve:Exponent,
FanPowerRatioCurve, !- Name
0.0, !- Coefficient1 Constant
1.0, !- Coefficient2 Constant
3.0, !- Coefficient3 Constant
0.0, !- Minimum Value of x
1.5, !- Maximum Value of x
0.01, !- Minimum Curve Output
1.5; !- Maximum Curve Output
superbluescooter24 wrote:
>
>
> In the 3.1 release I see the on off fan has a multispeed capability.
> Is there an example file that provides sample multispeed curves for
> the Fan:OnOff object? (Fan Power Ratio Function of Speed Ratio Curve &
> Fan Efficiency Ratio Function of Speed Ratio Curve)
> Thanks!!!
>
>
--
Richard A. Raustad
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