model ControlledFlowMachine package Medium = Buildings.Media.Air "Medium model"; Modelica.Blocks.Sources.Pulse y( startTime=0, offset=0, amplitude=1, period=120, width=50); Buildings.Fluid.Sources.Boundary_pT sou( redeclare package Medium = Medium, use_p_in=false, p=101325, T=293.15, nPorts=3); Buildings.Fluid.Sensors.MassFlowRate masFloRat1(redeclare package Medium = Medium); Buildings.Fluid.Sensors.RelativePressure relPre(redeclare package Medium = Medium); replaceable Buildings.Fluid.Movers.SpeedControlled_y fan1( redeclare package Medium = Medium, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, redeclare Buildings.Fluid.Movers.Data.Pumps.Wilo.Stratos32slash1to12 per) constrainedby Buildings.Fluid.Movers.SpeedControlled_y "Fan with normalized control input between 0 and 1"; Buildings.Fluid.FixedResistances.PressureDrop dp1( redeclare package Medium = Medium, from_dp=true, m_flow_nominal=0.006, dp_nominal=50000) "Pressure drop"; Buildings.Fluid.FixedResistances.PressureDrop dp2( redeclare package Medium = Medium, from_dp=true, m_flow_nominal=0.006, dp_nominal=50000) "Pressure drop"; Buildings.Fluid.Sensors.MassFlowRate masFloRat2( redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.PressureDrop dp3( redeclare package Medium = Medium, from_dp=true, m_flow_nominal=0.006, dp_nominal=50000) "Pressure drop"; Buildings.Fluid.Sensors.MassFlowRate masFloRat3( redeclare package Medium = Medium); replaceable Buildings.Fluid.Movers.FlowControlled_dp fan3( redeclare package Medium = Medium, m_flow_nominal=6000/3600*1.2, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, redeclare Buildings.Fluid.Movers.Data.Pumps.Wilo.Stratos32slash1to12 per) constrainedby Buildings.Fluid.Movers.FlowControlled_dp "Fan with head as input"; replaceable Buildings.Fluid.Movers.FlowControlled_m_flow fan2( redeclare package Medium = Medium, m_flow_nominal=6000/3600*1.2, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, redeclare Buildings.Fluid.Movers.Data.Pumps.Wilo.Stratos32slash1to12 per) constrainedby Buildings.Fluid.Movers.FlowControlled_m_flow "Fan with mass flow rate as input"; Buildings.Fluid.FixedResistances.PressureDrop dp5( m_flow_nominal=6000/3600*1.2, redeclare package Medium = Medium, dp_nominal=300, from_dp=true) "Pressure drop"; Buildings.Fluid.FixedResistances.PressureDrop dp6( m_flow_nominal=6000/3600*1.2, redeclare package Medium = Medium, dp_nominal=300, from_dp=true) "Pressure drop"; Buildings.Fluid.FixedResistances.PressureDrop dp7( m_flow_nominal=6000/3600*1.2, redeclare package Medium = Medium, dp_nominal=300, from_dp=true) "Pressure drop"; Buildings.Fluid.Sources.Boundary_pT sin( redeclare package Medium = Medium, use_p_in=false, p=101325, T=293.15, nPorts=3); equation connect(fan1.port_a, relPre.port_b); connect(fan1.port_b, relPre.port_a); connect(fan1.port_b, dp1.port_a); connect(fan2.port_b, dp2.port_a); connect(fan3.port_b, dp3.port_a); connect(masFloRat1.m_flow, fan2.m_flow_in); connect(relPre.p_rel, fan3.dp_in); connect(dp5.port_b, fan1.port_a); connect(dp6.port_b, fan2.port_a); connect(dp7.port_b, fan3.port_a); connect(y.y, fan1.y); connect(dp5.port_a, sou.ports[1]); connect(dp6.port_a, sou.ports[2]); connect(dp7.port_a, sou.ports[3]); connect(dp1.port_b, masFloRat1.port_a); connect(dp2.port_b, masFloRat2.port_a); connect(dp3.port_b, masFloRat3.port_a); connect(masFloRat1.port_b, sin.ports[1]); connect(masFloRat2.port_b, sin.ports[2]); connect(masFloRat3.port_b, sin.ports[3]); end ControlledFlowMachine;

partial model FlowMachine_ZeroFlow "Base class to test flow machines with zero flow rate" replaceable package Medium = Buildings.Media.Air constrainedby Modelica.Media.Interfaces.PartialMedium "Medium model"; parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=1 "Nominal mass flow rate"; parameter Modelica.Units.SI.PressureDifference dp_nominal=500 "Nominal pressure difference"; Modelica.Blocks.Sources.Ramp y( offset=1, duration=0.5, startTime=0.25, height=-1) "Input signal"; Buildings.Fluid.Sources.Boundary_pT sou( redeclare package Medium = Medium, use_p_in=false, p=101325, T=293.15, nPorts=4); Buildings.Fluid.FixedResistances.PressureDrop dpSta( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=dp_nominal/2) "Pressure drop"; replaceable Buildings.Fluid.Movers.BaseClasses.PartialFlowMachine floMacSta constrainedby Buildings.Fluid.Movers.BaseClasses.PartialFlowMachine( redeclare package Medium = Medium, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState) "Static model of a flow machine"; replaceable Buildings.Fluid.Movers.BaseClasses.PartialFlowMachine floMacDyn constrainedby Buildings.Fluid.Movers.BaseClasses.PartialFlowMachine( redeclare package Medium = Medium, energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial) "Dynamic model of a flow machine"; Buildings.Fluid.FixedResistances.PressureDrop dpDyn( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=dp_nominal/2) "Pressure drop"; Modelica.Blocks.Math.Gain gain "Gain for input signal"; Buildings.Fluid.FixedResistances.PressureDrop dpSta1( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=dp_nominal/2) "Pressure drop"; Buildings.Fluid.FixedResistances.PressureDrop dpDyn1( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=dp_nominal/2) "Pressure drop"; equation connect(floMacSta.port_b, dpSta.port_a); connect(y.y, gain.u); connect(floMacDyn.port_b, dpDyn.port_a); connect(dpSta1.port_b, floMacSta.port_a); connect(dpDyn1.port_b, floMacDyn.port_a); connect(dpSta1.port_a, sou.ports[1]); connect(dpDyn1.port_a, sou.ports[2]); connect(dpDyn.port_b, sou.ports[3]); connect(dpSta.port_b, sou.ports[4]); end FlowMachine_ZeroFlow;