.Buildings.Fluid.AirFilters.BaseClasses.PressureDropWithVaryingFlowCoefficient

Information

Model of a flow resistance with a varying flow coefficient.

This block is implemented based on Buildings.Fluid.FixedResistances.PressureDrop and inherits most of its configuration. However, its mass flow rate is calculated differently by using

m_flow / √dp = m_flow_nominal / (√dp_nominal*dpCor),

where dpCor is a correction factor of the flow coefficient. Therefore, if dpCor=1.2, at the nominal mass flow rate m_flow_nominal, there will be 20% more pressure drop than dp_nominal.

Revisions

• December 10, 2025, by Michael Wetter:
  Deleted old implementation as it assumed the pressure drop to be quadratic to the flow rate, which is not the case for a filter.
• December 22, 2023, by Sen Huang:
  First implementation.