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[EnergyPlus_Support] Fan Power Minimum Flow Rate Input Method
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- Subject: [EnergyPlus_Support] Fan Power Minimum Flow Rate Input Method
- From: "fpasserini.tn@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
- Date: 25 Jun 2014 09:37:44 -0700
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As for the object Fan:VariableVolume I don't understand clearly the meaning of the fields "Fan Power Minimum Flow Fraction" and "Fan Power Minimum Air Flow Rate".
In the "I/O Reference" I read:
Field: Fan Power Minimum Flow Fraction
The minimum air volumetric flow rate for fan power, specified as a fraction of maximum
system air flow rate. Must be between 0 and 1. Note that this field is only used to calculate
the fan power. This field does not enforce the system air flow rate during simulation. The
default is 0.25.
Does it mean that the "Fan Power Minimum Flow Fraction", in combination with the "power coefficients", determines the fan power at the minimum Flow fraction? How?
I read that "This field does not enforce the system air flow rate during simulation" but in my model if I write 0 as "Fan Power Minimum Flow Fraction" the AHU is not able to supply the outdoor air that I specified in Controller:OutdoorAir (it supplies a lower flow rate), while if I write 1 as "Fan Power Minimum Flow Fraction" the AHU can supply the outdoor air that I want.
Regards
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Posted by: fpasserini.tn@xxxxxxxxx
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