modelPartialWheel

Partial model for sensible heat recovery wheel
Diagram of PartialWheelOpen the diagram

Extends from Modelica.Blocks.Icons.Block (Basic graphical layout of input/output block).

Information

Partial model of a sensible heat recovery wheel.

Parameters

TypeNameDefaultDescription
Buildings.Fluid.HeatExchangers.ThermalWheels.Data.GenericperRecord with performance data
Assumptions
BooleanallowFlowReversal1true= false to simplify equations, assuming, but not enforcing, no flow reversal for medium 1
BooleanallowFlowReversal2true= false to simplify equations, assuming, but not enforcing, no flow reversal for medium 2
Flow resistance › Medium 1
Booleanfrom_dp1false= true, use m_flow = f(dp) else dp = f(m_flow)
Realn12Flow exponent, n1=1 for laminar, n1=2 for turbulent
BooleanlinearizeFlowResistance1false= true, use linear relation between m_flow and dp for any flow rate
Flow resistance › Medium 2
Booleanfrom_dp2false= true, use m_flow = f(dp) else dp = f(m_flow)
Realn22Flow exponent, n2=1 for laminar, n2=2 for turbulent
BooleanlinearizeFlowResistance2false= true, use linear relation between m_flow and dp for any flow rate

Connectors

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Interfaces.RealOutputPElectric power consumption
Buildings.Controls.OBC.CDL.Interfaces.RealOutputepsSensible heat exchanger effectiveness
Modelica.Fluid.Interfaces.FluidPort_aport_a1Fluid connector a1 of the supply air (positive design flow direction is from port_a1 to port_b1)
Modelica.Fluid.Interfaces.FluidPort_bport_b2Fluid connector b2 of the exhaust air (positive design flow direction is from port_a2 to port_b2)
Modelica.Fluid.Interfaces.FluidPort_bport_b1Fluid connector b1 of the supply air (positive design flow direction is from port_a1 to port_b1)
Modelica.Fluid.Interfaces.FluidPort_aport_a2Fluid connector a2 of the exhaust air (positive design flow direction is from port_a2 to port_b2)

Components

TypeNameDefaultDescription
Buildings.Fluid.Sensors.MassFlowRatesenSupMasFloSupply air mass flow rate
Buildings.Fluid.Sensors.MassFlowRatesenExhMasFloExhaust air mass flow rate

Contents

NameDescription
MediumAir

Revisions

  • June 17, 2026, by Michael Wetter:
    Updated implementation to allow a flow coefficient n that is different from 2. This allows use of the model for not fully turbulent flow.
    This is for Buildings, #4620.
  • January 8, 2023, by Sen Huang:
    First implementation.