Buildings.Fluid.Movers.Examples

Collection of models that illustrate model use and test models

Information

This package contains examples for the use of models that can be found in Buildings.Fluid.Movers.

Extends from Buildings.BaseClasses.BaseIconExamples (Icon for Examples packages).

Package Content

Name Description

FlowMachine_y

FlowMachine_Nrpm

FlowMachine_dp

FlowMachine_m_flow

ControlledFlowMachineDynamic

ControlledFlowMachine

FlowMachine

BaseClasses Base classes for examples

Name	Description
FlowMachine_y
FlowMachine_Nrpm
FlowMachine_dp
FlowMachine_m_flow
ControlledFlowMachineDynamic
ControlledFlowMachine
FlowMachine
BaseClasses	Base classes for examples

Buildings.Fluid.Movers.Examples.FlowMachine_y

Information

This example demonstrates and tests the use of a flow machine whose mass flow rate is reduced to zero.

Extends from Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow (Base class to test flow machines with zero flow rate).

Parameters

Type Name Default Description

MassFlowRate m_flow_nominal 1 Nominal mass flow rate [kg/s]

Pressure dp_nominal 500 Nominal pressure difference [Pa]

Type	Name	Default	Description
MassFlowRate	m_flow_nominal	1	Nominal mass flow rate [kg/s]
Pressure	dp_nominal	500	Nominal pressure difference [Pa]

Modelica definition

model FlowMachine_y
  import Buildings;
 extends Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow(
    gain(k=1),
    redeclare Buildings.Fluid.Movers.FlowMachine_y floMacSta(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal,
      redeclare function flowCharacteristic =
          Buildings.Fluid.Movers.BaseClasses.Characteristics.quadraticFlow (
            V_flow_nominal={0,m_flow_nominal,2*m_flow_nominal}/1.2, dp_nominal={
              2*dp_nominal,dp_nominal,0})),
    redeclare Buildings.Fluid.Movers.FlowMachine_y floMacDyn(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal,
      redeclare function flowCharacteristic =
          Buildings.Fluid.Movers.BaseClasses.Characteristics.quadraticFlow (
            V_flow_nominal={0,m_flow_nominal,2*m_flow_nominal}/1.2, dp_nominal={
              2*dp_nominal,dp_nominal,0})));

equation 
  connect(gain.y, floMacDyn.y);
  connect(gain.y, floMacSta.y);
end FlowMachine_y;

Buildings.Fluid.Movers.Examples.FlowMachine_Nrpm

Information

This example demonstrates and tests the use of a flow machine whose mass flow rate is reduced to zero.

Extends from Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow (Base class to test flow machines with zero flow rate).

Parameters

Type Name Default Description

MassFlowRate m_flow_nominal 1 Nominal mass flow rate [kg/s]

Pressure dp_nominal 500 Nominal pressure difference [Pa]

Type	Name	Default	Description
MassFlowRate	m_flow_nominal	1	Nominal mass flow rate [kg/s]
Pressure	dp_nominal	500	Nominal pressure difference [Pa]

Modelica definition

model FlowMachine_Nrpm
  import Buildings;
 extends Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow(
    gain(k=1500),
    redeclare Buildings.Fluid.Movers.FlowMachine_Nrpm floMacSta(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal,
      redeclare function flowCharacteristic =
          Buildings.Fluid.Movers.BaseClasses.Characteristics.quadraticFlow (
            V_flow_nominal={0,m_flow_nominal,2*m_flow_nominal}/1.2, dp_nominal={
              2*dp_nominal,dp_nominal,0})),
    redeclare Buildings.Fluid.Movers.FlowMachine_Nrpm floMacDyn(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal,
      redeclare function flowCharacteristic =
          Buildings.Fluid.Movers.BaseClasses.Characteristics.quadraticFlow (
            V_flow_nominal={0,m_flow_nominal,2*m_flow_nominal}/1.2, dp_nominal={
              2*dp_nominal,dp_nominal,0})));

equation 
  connect(gain.y, floMacSta.Nrpm);
  connect(gain.y, floMacDyn.Nrpm);
end FlowMachine_Nrpm;

Buildings.Fluid.Movers.Examples.FlowMachine_dp

Information

This example demonstrates and tests the use of a flow machine whose mass flow rate is reduced to zero.

Extends from Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow (Base class to test flow machines with zero flow rate).

Parameters

Type Name Default Description

MassFlowRate m_flow_nominal 1 Nominal mass flow rate [kg/s]

Pressure dp_nominal 500 Nominal pressure difference [Pa]

Type	Name	Default	Description
MassFlowRate	m_flow_nominal	1	Nominal mass flow rate [kg/s]
Pressure	dp_nominal	500	Nominal pressure difference [Pa]

Modelica definition

model FlowMachine_dp
  import Buildings;
 extends Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow(
    gain(k=dp_nominal),
    redeclare Buildings.Fluid.Movers.FlowMachine_dp floMacSta(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal),
    redeclare Buildings.Fluid.Movers.FlowMachine_dp floMacDyn(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal));

equation 
  connect(gain.y, floMacSta.dp_in);
  connect(gain.y, floMacDyn.dp_in);
end FlowMachine_dp;

Buildings.Fluid.Movers.Examples.FlowMachine_m_flow

Information

This example demonstrates and tests the use of a flow machine whose mass flow rate is reduced to zero.

Extends from Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow (Base class to test flow machines with zero flow rate).

Parameters

Type Name Default Description

MassFlowRate m_flow_nominal 1 Nominal mass flow rate [kg/s]

Pressure dp_nominal 500 Nominal pressure difference [Pa]

Type	Name	Default	Description
MassFlowRate	m_flow_nominal	1	Nominal mass flow rate [kg/s]
Pressure	dp_nominal	500	Nominal pressure difference [Pa]

Modelica definition

model FlowMachine_m_flow
  import Buildings;
 extends Buildings.Fluid.Movers.Examples.BaseClasses.FlowMachine_ZeroFlow(
    gain(k=m_flow_nominal),
    redeclare Buildings.Fluid.Movers.FlowMachine_m_flow floMacSta(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal),
    redeclare Buildings.Fluid.Movers.FlowMachine_m_flow floMacDyn(
      redeclare package Medium = Medium,
      m_flow_nominal=m_flow_nominal));

equation 
  connect(gain.y, floMacSta.m_flow_in);
  connect(gain.y, floMacDyn.m_flow_in);
end FlowMachine_m_flow;

Buildings.Fluid.Movers.Examples.ControlledFlowMachineDynamic

Information

This example demonstrates the use of the flow model with four different configuration. At steady-state, all flow models have the same mass flow rate and pressure difference.

Extends from Buildings.Fluid.Movers.Examples.BaseClasses.ControlledFlowMachine.

Modelica definition

model ControlledFlowMachineDynamic
extends Buildings.Fluid.Movers.Examples.BaseClasses.ControlledFlowMachine(
    fan4(dynamicBalance=true),
    fan1(dynamicBalance=true),
    fan2(dynamicBalance=true),
    fan3(dynamicBalance=true),
    limiter(uMin=0.03));

end ControlledFlowMachineDynamic;

Buildings.Fluid.Movers.Examples.ControlledFlowMachine

Information

This example demonstrates the use of the flow model with four different configuration. At steady-state, all flow models have the same mass flow rate and pressure difference.

Extends from Buildings.Fluid.Movers.Examples.BaseClasses.ControlledFlowMachine.

Modelica definition

model ControlledFlowMachine
  import Buildings;
extends Buildings.Fluid.Movers.Examples.BaseClasses.ControlledFlowMachine;

end ControlledFlowMachine;

Buildings.Fluid.Movers.Examples.FlowMachine

Modelica definition

model FlowMachine
  import Buildings;

   package Medium = Buildings.Media.IdealGases.SimpleAir;
  //  package Medium =  Buildings.Media.PerfectGases.MoistAir;
  //package Medium = Modelica.Media.Air.SimpleAir;
    Modelica.Blocks.Sources.Ramp P(
    height=-1500,
    offset=101325,
    duration=1.5);
  Buildings.Fluid.Movers.FlowMachinePolynomial fan(
    D=0.6858,
    a={4.2904,-1.387,4.2293,-3.92920,0.8534},
    b={0.1162,1.5404,-1.4825,0.7664,-0.1971},
    mNorMin_flow=1,
    mNorMax_flow=2,
    redeclare package Medium = Medium,
    m_flow_nominal=10);
  Modelica.Blocks.Sources.Constant N(k=22.3333);
  Buildings.Fluid.Sources.Boundary_pT sou(             redeclare package Medium
      = Medium,
    use_p_in=true,
    nPorts=1,
    T=293.15);
  Buildings.Fluid.Sources.Boundary_pT sin(             redeclare package Medium
      = Medium,
    use_p_in=true,
    nPorts=1,
    T=293.15);
    Modelica.Blocks.Sources.Constant PAtm(k=101325);
  Buildings.Utilities.Reports.Printer printer(
    nin=6,
    header="time dp dpNorm mNorm m_flow power");
  Modelica.Blocks.Sources.RealExpression fan_mFlow(y=fan.m_flow);
  Modelica.Blocks.Sources.RealExpression simTim2(y=time);
  Modelica.Blocks.Sources.RealExpression fan_dp(y=fan.dp);
  Modelica.Blocks.Sources.RealExpression fan_dpNor(y=fan.pNor);
  Modelica.Blocks.Sources.RealExpression fan_mNor(y=fan.mNor_flow);
  Modelica.Blocks.Sources.RealExpression fan_PSha(y=fan.PSha);
  inner Modelica.Fluid.System system;
  Buildings.Fluid.Sensors.Temperature TIn(redeclare package Medium = Medium);
  Buildings.Fluid.Sensors.Temperature TOut(redeclare package Medium = Medium);
  Buildings.Utilities.Diagnostics.AssertInequality assertInequality;
equation 

  connect(simTim2.y, printer.x[1]);
  connect(fan_dp.y, printer.x[2]);
  connect(fan_dpNor.y, printer.x[3]);
  connect(fan_mNor.y, printer.x[4]);
  connect(fan_PSha.y, printer.x[6]);
  connect(fan_mFlow.y, printer.x[5]);
  connect(N.y, fan.N_in);
  connect(P.y, sou.p_in);
  connect(PAtm.y, sin.p_in);
  connect(sou.ports[1], fan.port_a);
  connect(fan.port_b, sin.ports[1]);
  connect(fan.port_a, TIn.port);
  connect(fan.port_b, TOut.port);
  connect(TOut.T, assertInequality.u1);
  connect(TIn.T, assertInequality.u2);
end FlowMachine;

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