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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,132 +1,132 @@ | ||
| within IBPSA.Examples.Tutorial.SimpleHouse; | ||
| model SimpleHouse4 "Heating model" | ||
| extends SimpleHouse3; | ||
|
|
||
| parameter Modelica.Units.SI.HeatFlowRate QHea_flow_nominal=3000 | ||
| "Nominal capacity of heating system"; | ||
| parameter Modelica.Units.SI.MassFlowRate mWat_flow_nominal=0.1 | ||
| "Nominal mass flow rate for water loop"; | ||
| parameter Boolean use_constantHeater=true | ||
| "To enable/disable the connection between the constant source and heater"; | ||
|
|
||
| IBPSA.Fluid.HeatExchangers.Radiators.RadiatorEN442_2 rad( | ||
| redeclare package Medium = MediumWater, | ||
| T_a_nominal=333.15, | ||
| T_b_nominal=313.15, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial, | ||
| allowFlowReversal=false, | ||
| Q_flow_nominal=QHea_flow_nominal) "Radiator" | ||
| annotation (Placement(transformation(extent={{140,-140},{160,-120}}))); | ||
| IBPSA.Fluid.HeatExchangers.HeaterCooler_u heaWat( | ||
| redeclare package Medium = MediumWater, | ||
| m_flow_nominal=mWat_flow_nominal, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, | ||
| allowFlowReversal=false, | ||
| dp_nominal=5000, | ||
| Q_flow_nominal=QHea_flow_nominal) "Heater for water circuit" | ||
| annotation (Placement(transformation(extent={{60,-140},{80,-120}}))); | ||
| IBPSA.Fluid.Movers.FlowControlled_m_flow pum( | ||
| redeclare package Medium = MediumWater, | ||
| use_inputFilter=false, | ||
| m_flow_nominal=mWat_flow_nominal, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, | ||
| allowFlowReversal=false, | ||
| nominalValuesDefineDefaultPressureCurve=true, | ||
| inputType=IBPSA.Fluid.Types.InputType.Constant) "Pump" | ||
| annotation (Placement(transformation(extent={{160,-190},{140,-170}}))); | ||
| IBPSA.Fluid.Sources.Boundary_pT bouWat(redeclare package Medium = MediumWater, nPorts=1) | ||
| "Pressure bound for water circuit" annotation (Placement(transformation( | ||
| extent={{-10,-10},{10,10}}, | ||
| origin={20,-180}))); | ||
| Modelica.Blocks.Sources.Constant conHea(k=1) | ||
| annotation (Placement(transformation(extent={{80,-110},{60,-90}}))); | ||
| equation | ||
| connect(heaWat.port_b,rad. port_a) annotation (Line(points={{80,-130},{140,-130}}, | ||
| color={0,127,255})); | ||
| connect(rad.port_b, pum.port_a) annotation (Line(points={{160,-130},{175,-130}, | ||
| {175,-180},{160,-180}}, color={0,127,255})); | ||
| connect(heaWat.port_a, pum.port_b) annotation (Line(points={{60,-130},{39.75,-130}, | ||
| {39.75,-180},{140,-180}}, color={0,127,255})); | ||
| connect(rad.heatPortCon, zon.heatPort) annotation (Line(points={{148,-122.8},{ | ||
| 148,40},{160,40}}, color={191,0,0})); | ||
| connect(rad.heatPortRad, walCap.port) annotation (Line(points={{152,-122.8},{152, | ||
| 1.77636e-15},{160,1.77636e-15}}, color={191,0,0})); | ||
| if use_constantHeater then | ||
| connect(conHea.y, heaWat.u) annotation (Line(points={{59,-100},{40,-100},{40,-124}, | ||
| {58,-124}}, color={0,0,127})); | ||
| end if; | ||
| connect(bouWat.ports[1], pum.port_b) | ||
| annotation (Line(points={{30,-180},{140,-180}},color={0,127,255})); | ||
| annotation (Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-220, | ||
| -220},{220,220}})), | ||
| experiment(Tolerance=1e-6, StopTime=1e+06), | ||
| Documentation(revisions="<html> | ||
| <ul> | ||
| <li> | ||
| September 4, 2023, by Jelger Jansen:<br/> | ||
| First implementation. | ||
| </li> | ||
| </ul> | ||
| </html>", info="<html> | ||
| <p> | ||
| The wall temperature (and therefore the room temperature) is quite low. | ||
| In this step a heating system is added to resolve this. It consists of a radiator, a pump and a heater. | ||
| The radiator has a nominal power of <i>3 kW</i> for an inlet and outlet temperature of the radiator of <i>60°C</i> | ||
| and <i>40°C</i>, and a room air and radiative temperature of <i>20°C</i>. | ||
| The pump has a (nominal) mass flow rate of <i>0.1 kg/s</i>. | ||
| Since the heating system uses water as a heat carrier fluid, | ||
| the media for the models in the heating circuit should be set to <i>MediumWater</i>. | ||
| </p> | ||
| <h4>Required models</h4> | ||
| <ul> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.HeatExchangers.Radiators.RadiatorEN442_2\"> | ||
| IBPSA.Fluid.HeatExchangers.Radiators.RadiatorEN442_2</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.HeatExchangers.HeaterCooler_u\"> | ||
| IBPSA.Fluid.HeatExchangers.HeaterCooler_u</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.Movers.FlowControlled_m_flow\"> | ||
| IBPSA.Fluid.Movers.FlowControlled_m_flow</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.Sources.Boundary_pT\"> | ||
| IBPSA.Fluid.Sources.Boundary_pT</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://Modelica.Blocks.Sources.Constant\"> | ||
| Modelica.Blocks.Sources.Constant</a> | ||
| </li> | ||
| </ul> | ||
| <h4>Connection instructions</h4> | ||
| <p> | ||
| The radiator contains one port for convective heat transfer and one for radiative heat transfer. | ||
| Connect both in a reasonable way. Since the heating system uses water as a heat carrier fluid, | ||
| the media for the models should be set to <i>MediumWater</i>. | ||
| </p> | ||
| <p> | ||
| The <code>Boundary_pT</code> model needs to be used to set an absolute pressure somewhere in the system. | ||
| Otherwise the absolute pressure in the system is undefined. | ||
| Pressure difference modelling may be disregarded in the heating circuit | ||
| since the chosen pump sets a fixed mass flow rate regardless of the pressure drop. | ||
| </p> | ||
| <p> | ||
| Set the heater input to 1, meaning that it will produce 1 times its nominal power. | ||
| </p> | ||
| <h4>Reference result</h4> | ||
| <p> | ||
| The result of the air temperature is plotted in the figure below. | ||
| The temperature rises very steeply since the wall is relatively well insulated (<i>k=0.04 W/(m*K)</i>) | ||
| and the heater is not disabled when it becomes too warm. | ||
| </p> | ||
| <p align=\"center\"> | ||
| <img alt=\"Air temperature as function of time.\" | ||
| src=\"modelica://IBPSA/Resources/Images/Examples/Tutorial/SimpleHouse/result4.png\" width=\"1000\"/> | ||
| </p> | ||
| </html>"), | ||
| __Dymola_Commands(file= | ||
| "modelica://IBPSA/Resources/Scripts/Dymola/Examples/Tutorial/SimpleHouse/SimpleHouse4.mos" | ||
| "Simulate and plot")); | ||
| end SimpleHouse4; | ||
| within IBPSA.Examples.Tutorial.SimpleHouse; | ||
| model SimpleHouse4 "Heating model" | ||
| extends SimpleHouse3; | ||
|
|
||
| parameter Modelica.Units.SI.HeatFlowRate QHea_flow_nominal=3000 | ||
| "Nominal capacity of heating system"; | ||
| parameter Modelica.Units.SI.MassFlowRate mWat_flow_nominal=0.1 | ||
| "Nominal mass flow rate for water loop"; | ||
| parameter Boolean use_constantHeater=true | ||
| "To enable/disable the connection between the constant source and heater"; | ||
|
|
||
| IBPSA.Fluid.HeatExchangers.Radiators.RadiatorEN442_2 rad( | ||
| redeclare package Medium = MediumWater, | ||
| T_a_nominal=333.15, | ||
| T_b_nominal=313.15, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial, | ||
| allowFlowReversal=false, | ||
| Q_flow_nominal=QHea_flow_nominal) "Radiator" | ||
| annotation (Placement(transformation(extent={{140,-140},{160,-120}}))); | ||
| IBPSA.Fluid.HeatExchangers.HeaterCooler_u heaWat( | ||
| redeclare package Medium = MediumWater, | ||
| m_flow_nominal=mWat_flow_nominal, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, | ||
| allowFlowReversal=false, | ||
| dp_nominal=5000, | ||
| Q_flow_nominal=QHea_flow_nominal) "Heater for water circuit" | ||
| annotation (Placement(transformation(extent={{60,-140},{80,-120}}))); | ||
| IBPSA.Fluid.Movers.FlowControlled_m_flow pum( | ||
| redeclare package Medium = MediumWater, | ||
| use_inputFilter=false, | ||
| m_flow_nominal=mWat_flow_nominal, | ||
| energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, | ||
| allowFlowReversal=false, | ||
| nominalValuesDefineDefaultPressureCurve=true, | ||
| inputType=IBPSA.Fluid.Types.InputType.Constant) "Pump" | ||
| annotation (Placement(transformation(extent={{160,-190},{140,-170}}))); | ||
| IBPSA.Fluid.Sources.Boundary_pT bouWat(redeclare package Medium = MediumWater, nPorts=1) | ||
| "Pressure bound for water circuit" annotation (Placement(transformation( | ||
| extent={{-10,-10},{10,10}}, | ||
| origin={20,-180}))); | ||
| Modelica.Blocks.Sources.Constant conHea(k=1) | ||
| annotation (Placement(transformation(extent={{80,-110},{60,-90}}))); | ||
| equation | ||
| connect(heaWat.port_b,rad. port_a) annotation (Line(points={{80,-130},{140,-130}}, | ||
| color={0,127,255})); | ||
| connect(rad.port_b, pum.port_a) annotation (Line(points={{160,-130},{175,-130}, | ||
| {175,-180},{160,-180}}, color={0,127,255})); | ||
| connect(heaWat.port_a, pum.port_b) annotation (Line(points={{60,-130},{39.75,-130}, | ||
| {39.75,-180},{140,-180}}, color={0,127,255})); | ||
| connect(rad.heatPortCon, zon.heatPort) annotation (Line(points={{148,-122.8},{ | ||
| 148,40},{160,40}}, color={191,0,0})); | ||
| connect(rad.heatPortRad, walCap.port) annotation (Line(points={{152,-122.8},{152, | ||
| 1.77636e-15},{160,1.77636e-15}}, color={191,0,0})); | ||
| if use_constantHeater then | ||
| connect(conHea.y, heaWat.u) annotation (Line(points={{59,-100},{40,-100},{40,-124}, | ||
| {58,-124}}, color={0,0,127})); | ||
| end if; | ||
| connect(bouWat.ports[1], pum.port_b) | ||
| annotation (Line(points={{30,-180},{140,-180}},color={0,127,255})); | ||
| annotation (Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-220, | ||
| -220},{220,220}})), | ||
| experiment(Tolerance=1e-6, StopTime=1e+06), | ||
| Documentation(revisions="<html> | ||
| <ul> | ||
| <li> | ||
| September 4, 2023, by Jelger Jansen:<br/> | ||
| First implementation. | ||
| </li> | ||
| </ul> | ||
| </html>", info="<html> | ||
| <p> | ||
| The wall temperature (and therefore the room temperature) is quite low. | ||
| In this step a heating system is added to resolve this. It consists of a radiator, a pump and a heater. | ||
| The radiator has a nominal power of <i>3 kW</i> for an inlet and outlet temperature of the radiator of <i>60°C</i> | ||
| and <i>40°C</i>, and a room air and radiative temperature of <i>20°C</i>. | ||
| The pump has a (nominal) mass flow rate of <i>0.1 kg/s</i>. | ||
| Since the heating system uses water as a heat carrier fluid, | ||
| the media for the models in the heating circuit should be set to <i>MediumWater</i>. | ||
| </p> | ||
| <h4>Required models</h4> | ||
| <ul> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.HeatExchangers.Radiators.RadiatorEN442_2\"> | ||
| IBPSA.Fluid.HeatExchangers.Radiators.RadiatorEN442_2</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.HeatExchangers.HeaterCooler_u\"> | ||
| IBPSA.Fluid.HeatExchangers.HeaterCooler_u</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.Movers.FlowControlled_m_flow\"> | ||
| IBPSA.Fluid.Movers.FlowControlled_m_flow</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://IBPSA.Fluid.Sources.Boundary_pT\"> | ||
| IBPSA.Fluid.Sources.Boundary_pT</a> | ||
| </li> | ||
| <li> | ||
| <a href=\"modelica://Modelica.Blocks.Sources.Constant\"> | ||
| Modelica.Blocks.Sources.Constant</a> | ||
| </li> | ||
| </ul> | ||
| <h4>Connection instructions</h4> | ||
| <p> | ||
| The radiator contains one port for convective heat transfer and one for radiative heat transfer. | ||
| Connect both in a reasonable way. Since the heating system uses water as a heat carrier fluid, | ||
| the media for the models should be set to <i>MediumWater</i>. | ||
| </p> | ||
| <p> | ||
| The <code>Boundary_pT</code> model needs to be used to set an absolute pressure somewhere in the system. | ||
| Otherwise the absolute pressure in the system is undefined. | ||
| Pressure difference modelling may be disregarded in the heating circuit | ||
| since the chosen pump sets a fixed mass flow rate regardless of the pressure drop. | ||
| </p> | ||
| <p> | ||
| Set the heater input to 1, meaning that it will produce 1 times its nominal power. | ||
| </p> | ||
| <h4>Reference result</h4> | ||
| <p> | ||
| The result of the air temperature is plotted in the figure below. | ||
| The temperature rises very steeply since the wall is relatively well insulated (<i>k=0.04 W/(m*K)</i>) | ||
| and the heater is not disabled when it becomes too warm. | ||
| </p> | ||
| <p align=\"center\"> | ||
| <img alt=\"Air temperature as function of time.\" | ||
| src=\"modelica://IBPSA/Resources/Images/Examples/Tutorial/SimpleHouse/result4.png\" width=\"1000\"/> | ||
| </p> | ||
| </html>"), | ||
| __Dymola_Commands(file= | ||
| "modelica://IBPSA/Resources/Scripts/Dymola/Examples/Tutorial/SimpleHouse/SimpleHouse4.mos" | ||
| "Simulate and plot")); | ||
| end SimpleHouse4; |
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