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‎IDEAS/Airflow/Multizone/CrackOrOperableDoor.mo‎

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within IDEAS.Airflow.Multizone;
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model CrackOrOperableDoor
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"Infiltration or large opening model used for the embeded airflow implementation in IDEAS.Buildings.Components"
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extends IDEAS.Fluid.Interfaces.PartialFourPortInterface(
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redeclare final package Medium1 = Medium,
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redeclare final package Medium2 = Medium,
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final allowFlowReversal1=true,
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final allowFlowReversal2=true,
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final m1_flow_nominal=10/3600*rho_default,
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final m2_flow_nominal=m1_flow_nominal,
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final m1_flow_small=1E-4*abs(m1_flow_nominal),
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final m2_flow_small=1E-4*abs(m2_flow_nominal));
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extends IDEAS.Airflow.Multizone.BaseClasses.ErrorControl(forceErrorControlOnFlow=true); //force error control on flow rates
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replaceable package Medium =
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Modelica.Media.Interfaces.PartialMedium "Medium in the component"
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annotation (choices(
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choice(redeclare package Medium = IDEAS.Media.Air "Moist air")));
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parameter Modelica.Units.SI.Velocity vZer=0.001
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"Minimum velocity to prevent zero flow. Recommended: 0.001";
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parameter Modelica.Units.SI.Length wOpe=0.9 "Width of opening"
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annotation (Dialog(group="Geometry"));
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parameter Modelica.Units.SI.Length hOpe=2.1 "Height of opening"
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annotation (Dialog(group="Geometry"));
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parameter BoundaryConditions.Types.InterZonalAirFlow interZonalAirFlowType
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"Interzonal air flow type";
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final parameter Modelica.Units.SI.PressureDifference dpCloRat(displayUnit="Pa")=50
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"Pressure drop at rating condition of closed door"
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annotation (Dialog(group="Rating conditions"));
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parameter Modelica.Units.SI.Length h_b1 "Height at port b1 (hasCavity=false)";
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parameter Modelica.Units.SI.Length h_b2 = 0 "Height at port b2(hasCavity=false)";
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parameter Modelica.Units.SI.Length h_a1 = 0 "Height at port a1(hasCavity=false)";
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parameter Modelica.Units.SI.Length h_a2 "Height at port a2(hasCavity=false)";
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parameter SI.Length hA=(h_a1 + h_b2)/2
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"Height of reference pressure at port a1 for opening (hasCavity=true) model";
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parameter SI.Length hB=(h_a2 + h_b1)/2
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"Height of reference pressure at port b1 for opening (hasCavity=true) model";
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final parameter Real CDCloRat(min=0, max=1)=1
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"Discharge coefficient at rating conditions of closed door"
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annotation (Dialog(group="Rating conditions"));
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parameter Modelica.Units.SI.Area A_q50 "Surface area for leakage computation (closed door)";
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parameter Real q50(unit="m3/(h.m2)") "Surface air tightness";
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final parameter Modelica.Units.SI.Area LClo(min=0) = ((q50*A_q50/3600)/(dpCloRat)^mClo)/(((dpCloRat)^(0.5-mClo))*sqrt(2/rho_default))
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"Effective leakage area of internal wall (when door is fully closed)"
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annotation (Dialog(group="Crack or Closed door"));
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parameter Real CDOpe=0.78 "Discharge coefficient of open door"
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annotation (Dialog(group="Open door"));
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parameter Real mOpe = 0.5 "Flow exponent for door of open door"
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annotation (Dialog(group="Open door"));
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parameter Real mClo= 0.65 "Flow exponent for crack or crack of closed door"
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annotation (Dialog(group="Crack or Closed door"));
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parameter Integer nCom=if abs(hOpe*sin(inc)) < 0.01 then 2 else max(2,integer(abs(hOpe*sin(inc))/4)) "Number of compartments for the discretization";
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parameter Boolean useDoor = false "=true, to use operable door instead of a crack";
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parameter Boolean use_y = true "=true, to use control input";
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parameter Boolean openDoorOnePort = false "Sets whether a door is open or closed in one port configuration";
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parameter Modelica.Units.SI.PressureDifference dp_turbulent(
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min=0,
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displayUnit="Pa") = 0.01
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"Pressure difference where laminar and turbulent flow relation coincide. Recommended: 0.01";
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parameter Modelica.Units.SI.PressureDifference dp_turbulent_ope(min=0,displayUnit="Pa") = (MFtrans/(rho_default*(CDOpe * hOpe*wOpe * sqrt(2/rho_default))))^(1/mOpe)
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if useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Pressure difference where laminar and turbulent flow relation coincide for large cavities";
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parameter Modelica.Units.SI.MassFlowRate MFtrans=(hOpe*wOpe)*VItrans*REtrans/DOpe if useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Recommended massflowrate used for reguralisation";
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parameter Modelica.Units.SI.Length DOpe=4*hOpe*wOpe/(2*hOpe+2*wOpe) if useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Estimated hydraulic diameter of the opening - 4*A/Perimeter";
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constant Modelica.Units.SI.ReynoldsNumber REtrans=30 if useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Assumed Reynolds number at transition";
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constant Modelica.Units.SI.DynamicViscosity VItrans=0.0000181625 if useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Assumed dynamic viscosity of air at transition";
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final parameter Medium.ThermodynamicState state_default=Medium.setState_pTX(
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T=Medium.T_default,
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p=Medium.p_default,
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X=Medium.X_default[1:Medium.nXi]) "Medium state at default values";
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final parameter Modelica.Units.SI.Density rho_default=Medium.density(state=state_default) "Medium default density";
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86+
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Modelica.Blocks.Interfaces.RealInput y(min=0, max=1, unit="1") if useDoor and use_y
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"Opening signal, 0=closed, 1=open"
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annotation (Placement(transformation(extent={{-120,-10},{-100,10}}), iconTransformation(extent={{-120,-10},{-100,10}})));
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IDEAS.Airflow.Multizone.Point_m_flow point_m_flow1(
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redeclare package Medium = Medium,
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dpMea_nominal = dpCloRat,
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forceErrorControlOnFlow=true,
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mMea_flow_nominal=if openDoorOnePort and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.OnePort
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then wOpe*hOpe*rho_default*CDCloRat*(2*dpCloRat/rho_default)^mClo else (if
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interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts
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then 0.5 else 1)*(q50/3600*rho_default)*A_q50,
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m = if openDoorOnePort and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.OnePort then mOpe else mClo,
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useDefaultProperties = false) if not useDoor or (useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.OnePort) "Pressure drop equation" annotation (
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Placement(visible = true, transformation(origin = {0, 60}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
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IDEAS.Airflow.Multizone.MediumColumnReversible col_b1(redeclare package
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Medium = Medium, h=h_b1) if interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts
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and not useDoor "Column for port b1" annotation (Placement(visible=true,
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transformation(
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origin={0,70},
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extent={{50,-10},{70,10}},
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rotation=0)));
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IDEAS.Airflow.Multizone.MediumColumnReversible col_a1(redeclare package
110+
Medium = Medium, h=h_a1) if interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts
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and not useDoor "Column for port a1" annotation (Placement(visible=true,
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transformation(
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origin={0,70},
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extent={{-70,-10},{-50,10}},
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rotation=0)));
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IDEAS.Airflow.Multizone.MediumColumnReversible col_b2(redeclare package
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Medium = Medium, h=h_b2) if interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts
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and not useDoor "Column for port b2" annotation (Placement(visible=true,
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transformation(
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origin={0,-50},
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extent={{-70,-10},{-50,10}},
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rotation=0)));
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IDEAS.Airflow.Multizone.MediumColumnReversible col_a2(redeclare package
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Medium = Medium, h=h_a2) if interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts
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and not useDoor "Column for port a2" annotation (Placement(visible=true,
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transformation(
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origin={0,-50},
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extent={{50,-10},{70,10}},
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rotation=0)));
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IDEAS.Airflow.Multizone.Point_m_flow point_m_flow2(
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redeclare package Medium = Medium,
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dpMea_nominal = dpCloRat,
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forceErrorControlOnFlow=true,
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m = mClo,
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mMea_flow_nominal = (q50/3600*rho_default)*A_q50*0.5,
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useDefaultProperties = false) if not useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts "Pressure drop equation" annotation (
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Placement(visible = true, transformation(origin = {0, -60}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
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IDEAS.Airflow.Multizone.DoorDiscretizedOperable doo(
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final dh=doo.hOpe*sin(inc)/nCom,
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redeclare package Medium = Medium,
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final hA=hA,
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final hB=hB,
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dp_turbulent=dp_turbulent_ope,
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nCom=nCom,
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CDOpe=CDOpe,
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CDClo=CDCloRat,
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mOpe=mOpe,
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mClo=mClo,
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CDCloRat=CDCloRat,
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wOpe=wOpe,
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hOpe=hOpe,
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dpCloRat=dpCloRat,
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LClo=LClo,
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vZer=vZer*MFtrans*rho_default)
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if useDoor and interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts annotation (
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Placement(visible = true, transformation(origin={-2,0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
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IDEAS.Fluid.Sources.Boundary_pT bou(
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redeclare package Medium = Medium,
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nPorts = 2)
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if interZonalAirFlowType <> IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts
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"Sets absolute pressure when the ports are not connected externally" annotation (
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Placement(visible = true, transformation(origin = {0, -90}, extent = {{-10, 10}, {10, -10}}, rotation = 90)));
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Modelica.Blocks.Sources.Constant constOne(final k=1)
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if not use_y
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"Door constantly opened" annotation (
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Placement(visible = true, transformation(origin = {-54, -14}, extent = {{-6, -6}, {6, 6}}, rotation = 0)));
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parameter SI.Angle inc=Modelica.Constants.pi/2
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"inclination angle (vertical=pi/2)";
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initial equation
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assert( not (interZonalAirFlowType <> IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts and useDoor and use_y),
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"In " +getInstanceName() + ": Cannot use a controllable door unless interZonalAirFlowType == TwoPorts.");
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equation
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connect(col_a1.port_a, point_m_flow1.port_a) annotation (
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Line(points = {{-60, 80}, {-60, 84}, {-20, 84}, {-20, 60}, {-10, 60}}, color = {0, 127, 255}));
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connect(col_b1.port_a, point_m_flow1.port_b) annotation (
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Line(points = {{60, 80}, {60, 84}, {20, 84}, {20, 60}, {10, 60}}, color = {0, 127, 255}));
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connect(col_b2.port_a, point_m_flow2.port_a) annotation (
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Line(points = {{-60, -40}, {-60, -36}, {-20, -36}, {-20, -60}, {-10, -60}}, color = {0, 127, 255}));
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connect(col_a2.port_a, point_m_flow2.port_b) annotation (
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Line(points = {{60, -40}, {60, -36}, {20, -36}, {20, -60}, {10, -60}}, color = {0, 127, 255}));
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connect(col_b2.port_b, port_b2) annotation (
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Line(points = {{-60, -60}, {-100, -60}}, color = {0, 127, 255}));
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connect(col_a2.port_b, port_a2) annotation (
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Line(points = {{60, -60}, {100, -60}}, color = {0, 127, 255}));
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connect(col_b1.port_b, port_b1) annotation (
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Line(points = {{60, 60}, {100, 60}}, color = {0, 127, 255}));
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connect(col_a1.port_b, port_a1) annotation (
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Line(points = {{-60, 60}, {-100, 60}}, color = {0, 127, 255}));
191+
connect(y, doo.y) annotation (
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Line(points={{-110,0},{-13,0}}, color = {0, 0, 127}));
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connect(bou.ports[1], port_a2) annotation (
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Line(points={{-1,-80},{100,-80},{100,-60}}, color = {0, 127, 255}));
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if interZonalAirFlowType <> IDEAS.BoundaryConditions.Types.InterZonalAirFlow.TwoPorts then
196+
connect(point_m_flow1.port_a, port_a1) annotation (
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Line(points = {{-10, 60}, {-100, 60}}, color = {0, 127, 255}));
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connect(point_m_flow1.port_b, port_b1) annotation (
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Line(points = {{10, 60}, {100, 60}}, color = {0, 127, 255}));
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end if;
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connect(constOne.y, doo.y) annotation (
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Line(points={{-47.4,-14},{-32,-14},{-32,0},{-13,0}}, color = {0, 0, 127}));
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connect(bou.ports[2], port_b2) annotation (
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Line(points={{1,-80},{-100,-80},{-100,-60}}, color = {0, 127, 255}));
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connect(doo.port_a1, port_a1) annotation (
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Line(points={{-12,6},{-30,6},{-30,60},{-100,60}}, color = {0, 127, 255}));
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connect(doo.port_b1, port_b1) annotation (
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Line(points={{8,6},{30,6},{30,60},{100,60}}, color = {0, 127, 255}));
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connect(doo.port_b2, port_b2) annotation (
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Line(points={{-12,-6},{-20,-6},{-20,-34},{-100,-34},{-100,-60}}, color = {0, 127, 255}));
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connect(doo.port_a2, port_a2) annotation (
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Line(points={{8,-6},{20,-6},{20,-34},{100,-34},{100,-60}}, color = {0, 127, 255}));
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annotation(Documentation(info="<html>
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<p>
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This models an open/closed door depending on the number of available fluid ports.
217+
</p>
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<p>
219+
When only one port is available then an orrifice equation is used to approximate the closed door.
220+
There is no support for open doors when using only a single fluid port.
221+
</p>
222+
</html>",
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revisions="<html>
224+
<ul>
225+
<li>
226+
October 30, 2024, by Klaas De Jonge:<br/>
227+
Changes for column heights,used default density and transition point to laminar flow at low dp.
228+
</li>
229+
<li>
230+
October 20, 2023 by Filip Jorissen:<br/>
231+
First documented version.
232+
</li>
233+
</ul>
234+
</html>"),
235+
Diagram,
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Icon(graphics={ Polygon(lineColor = {0, 0, 255}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, points = {{-30, -10}, {-16, -8}, {-16, -14}, {-30, -16}, {-30, -10}}), Line(points = {{-54, 48}, {-36, 48}}), Line(points = {{-54, 20}, {-36, 20}}), Rectangle(fillColor = {255, 255, 255}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-100, 100}, {100, -100}}), Line(points = {{-54, -58}, {-36, -58}}), Rectangle(lineColor = {0, 0, 255}, fillColor = {255, 128, 0}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-46, -16}, {-20, -20}}), Rectangle(lineColor = {0, 0, 255}, fillColor = {85, 75, 55}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-60, 80}, {60, -84}}), Rectangle(fillColor = {215, 215, 215}, fillPattern = FillPattern.Solid, extent = {{-54, 72}, {56, -84}}), Polygon(fillColor = {95, 95, 95}, fillPattern = FillPattern.Solid, points = {{56, 72}, {-36, 66}, {-36, -90}, {56, -84}, {56, 72}}), Rectangle(lineColor = {0, 0, 255}, fillColor = {255, 128, 0}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-100, 2}, {-46, -2}}), Polygon(visible = false, origin = {75, 50}, rotation = 360, lineColor = {0, 128, 255}, fillColor = {0, 128, 255}, fillPattern = FillPattern.Solid, points = {{-5, 10}, {25, 10}, {-5, -10}, {-5, 10}}), Text(textColor = {0, 0, 127}, extent = {{-118, 34}, {-98, 16}}, textString = "y"), Line(points = {{-54, -6}, {-36, -6}}), Line(points = {{-54, -32}, {-36, -32}}), Polygon(visible = false, origin = {-79, -50}, rotation = 360, lineColor = {0, 128, 255}, fillColor = {0, 128, 255}, fillPattern = FillPattern.Solid, points = {{10, 10}, {-20, -10}, {10, -10}, {10, 10}}), Rectangle(lineColor = {0, 0, 255}, fillColor = {255, 128, 0}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-46, 2}, {-40, -16}})}, coordinateSystem(extent = {{-100, -100}, {100, 100}})));
237+
end CrackOrOperableDoor;

‎IDEAS/Airflow/Multizone/Examples/TrickleVentIDEAS.mo‎

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within IDEAS.Airflow.Multizone.Examples;
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model TrickleVentIDEAS
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"Model with a trickle vent modelled using the models with flow based on tabulated data"
4+
extends IDEAS.Airflow.Multizone.Examples.TrickleVent(west(nPorts=2), east(nPorts=2));
5+
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IDEAS.Airflow.Multizone.TrickleVent vent(
7+
redeclare package Medium = Medium,
8+
dp_nominal = 10,
9+
m_flow_nominal = 0.02614,
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use_y = true)
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"Analytic trickle vent implementation" annotation (
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Placement(visible = true, transformation(origin = {20, -70}, extent = {{-10, 10}, {10, -10}}, rotation = 0)));
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Modelica.Blocks.Sources.Ramp ramp(
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duration = 1e6,
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height = -1,
16+
offset = 1,
17+
startTime = 1592000)
18+
"Step control signal" annotation (
19+
Placement(visible = true, transformation(origin = {-90, -88}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
20+
equation
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connect(vent.port_a, east.ports[2]) annotation (
22+
Line(points = {{10, -70}, {-25, -70}, {-25, -30}, {-30, -30}}, color = {0, 127, 255}));
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connect(vent.port_b, west.ports[2]) annotation (
24+
Line(points = {{30, -70}, {65, -70}, {65, -30}, {70, -30}}, color = {0, 127, 255}));
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connect(ramp.y, vent.y) annotation (
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Line(points = {{-79, -88}, {20.5, -88}, {20.5, -82}, {20, -82}}, color = {0, 0, 127}));
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annotation (__Dymola_Commands(file="modelica://IDEAS/Resources/Scripts/Dymola/Airflow/Multizone/Examples/TrickleVentIDEAS.mos"
28+
"Simulate and plot"),
29+
experiment(
30+
StopTime=2592000,
31+
Interval=600,
32+
Tolerance=1e-06),
33+
Documentation(info="<html>
34+
<p>
35+
This model illustrates the use of the models
36+
<a href=\"modelica://IDEAS.Airflow.Multizone.TrickleVent\">
37+
IDEAS.Airflow.Multizone.Table_V_flow</a>,
38+
which is an analytic alternative to the table implementation of
39+
<a href=\"modelica://IDEAS.Airflow.Multizone.Table_m_flow\">
40+
IDEAS.Airflow.Multizone.Table_m_flow</a> for modelling self regulating inlet vents.
41+
</p>
42+
</html>", revisions="<html>
43+
<ul>
44+
<li>
45+
July 9, 2023 by Filip Jorissen:<br/>
46+
First implementation.
47+
</li>
48+
</ul>
49+
</html>"),
50+
Diagram);
51+
end TrickleVentIDEAS;

‎IDEAS/Airflow/Multizone/MediumColumnReversible.mo‎

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within IDEAS.Airflow.Multizone;
2+
model MediumColumnReversible
3+
"Vertical shaft with no friction and no storage of heat and mass, reversible because it can handle negative column heights"
4+
5+
extends IDEAS.Airflow.Multizone.MediumColumn(
6+
h(min=-Modelica.Constants.inf),
7+
final densitySelection = IDEAS.Airflow.Multizone.Types.densitySelection.fromBottom);
8+
// by convention, port_b must be connected to a zone instead of a flow element
9+
// h is allowed to be negative to accomodate for this convention
10+
11+
annotation (
12+
Icon(graphics={
13+
Line(
14+
points={{0,100},{0,-100},{0,-98}}),
15+
Text(origin = {-126, 2},lineColor = {0, 0, 127}, extent = {{24, -78}, {106, -100}}, textString = "Zone/Amb"),
16+
Text(origin = {-130, 4}, lineColor = {0, 0, 127}, extent = {{32, 104}, {98, 70}}, textString = "FlowElem"),
17+
Text(lineColor = {0, 0, 127}, extent = {{36, 26}, {88, -10}}, textString = "h=%h"),
18+
Rectangle(fillColor = {255, 0, 0}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-16, 80}, {16, -80}}),
19+
Rectangle(visible = false, fillColor = {85, 170, 255}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-16, 80}, {16, 0}}),
20+
Rectangle(visible = false, fillColor = {85, 170, 255}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-16, 80}, {16, 54}}),
21+
Rectangle(fillColor = {85, 170, 255}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-16, 0}, {16, -82}}),
22+
Rectangle(visible = false, fillColor = {85, 170, 255}, pattern = LinePattern.None, fillPattern = FillPattern.Solid, extent = {{-16, -55}, {16, -80}})}),
23+
defaultComponentName="col",
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Documentation(info="<html>
25+
<p>
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This model describes the pressure difference of a vertical medium
27+
column. It can be used to model the pressure difference caused by
28+
stack effect.
29+
It is a variation on IDEAS.Airflow.Multizone.MediumColumn.
30+
</p>
31+
</html>",
32+
revisions="<html>
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<ul>
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<li>
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January 19, 2022, by Klaas De Jonge:<br/>
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Adapted IDEAS.Airflow.Multizone.MediumColumn to obtain the current model where input of
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h can be negative and cleaned out the model as the density should always be set by port_b.
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This makes port_a not nececarilly always the top port.
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</li>
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</ul>
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</html>"));
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end MediumColumnReversible;

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