Buildings.DHC.Plants.Cooling.Subsystems.Examples

Example models integrating multiple components

Information

This package contains advanced examples illustrating the use of the models in Buildings.DHC.Plants.Cooling.Subsystems.

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name	Description
CoolingTowersParallel	Example model for parallel cooling tower model
CoolingTowersWithBypass	Example model for parallel cooling towers with bypass valve
BaseClasses	Package with base classes

Buildings.DHC.Plants.Cooling.Subsystems.Examples.CoolingTowersParallel

Example model for parallel cooling tower model

Buildings.DHC.Plants.Cooling.Subsystems.Examples.CoolingTowersParallel

Information

This model validates the parallel connected cooling tower subsystem in Buildings.DHC.Plants.Cooling.Subsystems.CoolingTowersParallel.

Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.DHC.Plants.Cooling.Subsystems.Examples.BaseClasses.PartialCoolingTowersSubsystem (Partial class for test models of subsystems).

Parameters

Type	Name	Default	Description
Nominal condition
MassFlowRate	m_flow_nominal	0.5	Design water flow rate [kg/s]

Connectors

Type	Name	Description
Bus	weaBus	Weather data bus

Modelica definition

model CoolingTowersParallel "Example model for parallel cooling tower model" extends Modelica.Icons.Example; extends Buildings.DHC.Plants.Cooling.Subsystems.Examples.BaseClasses.PartialCoolingTowersSubsystem ( redeclare Buildings.DHC.Plants.Cooling.Subsystems.CoolingTowersParallel tow( TAirInWB_nominal=273.15+25.55, TWatIn_nominal=273.15+35, dT_nominal=5.56, dpValve_nominal = 6000, dp_nominal = 6000, PFan_nominal=4800, use_inputFilter=false), weaDat(final computeWetBulbTemperature=true)); Buildings.Controls.OBC.CDL.Reals.Sources.Constant TSetLea( k=273.15+18) "Setpoint for leaving temperature"; Buildings.Controls.OBC.CDL.Reals.PIDWithReset conFan( k=1, Ti=60, Td=10, reverseActing=false, u_s( unit="K", displayUnit="degC"), u_m( unit="K", displayUnit="degC")) "Controller for tower fan"; equation connect(TSetLea.y, conFan.u_s); connect(tow.TLvg, conFan.u_m); connect(conFan.y, tow.uFanSpe); connect(weaBus.TWetBul, tow.TWetBul); connect(hys.y, tow.on[1]); connect(hys.y, tow.on[2]); connect(hys.y, conFan.trigger); end CoolingTowersParallel;

Buildings.DHC.Plants.Cooling.Subsystems.Examples.CoolingTowersWithBypass

Example model for parallel cooling towers with bypass valve

Buildings.DHC.Plants.Cooling.Subsystems.Examples.CoolingTowersWithBypass

Information

This model validates the parallel connected cooling tower subsystem in Buildings.DHC.Plants.Cooling.Subsystems.CoolingTowerWithBypass.

Parameters

Type	Name	Default	Description
Temperature	TMin	273.15 + 10	Minimum allowed water temperature entering chiller [K]
Nominal condition
MassFlowRate	m_flow_nominal	0.5	Design water flow rate [kg/s]

Connectors

Type	Name	Description
Bus	weaBus	Weather data bus

Modelica definition

model CoolingTowersWithBypass "Example model for parallel cooling towers with bypass valve" extends Modelica.Icons.Example; extends Buildings.DHC.Plants.Cooling.Subsystems.Examples.BaseClasses.PartialCoolingTowersSubsystem ( redeclare Buildings.DHC.Plants.Cooling.Subsystems.CoolingTowersWithBypass tow( dpValve_nominal = 6000, dp_nominal(displayUnit="Pa") = 6000, TAirInWB_nominal=273.15 + 25.55, TWatIn_nominal=273.15 + 35, dT_nominal=5.56, PFan_nominal=4800, TMin=TMin, controllerType=Modelica.Blocks.Types.SimpleController.PI), weaDat(final computeWetBulbTemperature=true)); parameter Modelica.Units.SI.Temperature TMin=273.15 + 10 "Minimum allowed water temperature entering chiller"; equation connect(weaBus.TWetBul, tow.TWetBul); connect(hys.y, tow.on[1]); connect(hys.y, tow.on[2]); end CoolingTowersWithBypass;