modelCoolingTowersWithBypass

Example model for parallel cooling towers with bypass valve
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Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.DHC.Plants.Cooling.Subsystems.Examples.BaseClasses.PartialCoolingTowersSubsystem (Partial class for test models of subsystems).

Information

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

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.TemperatureTMin273.15 + 10Minimum allowed water temperature entering chiller
Nominal condition
Modelica.Units.SI.MassFlowRatem_flow_nominal (from PartialCoolingTowersSubsystem)0.5Design water flow rate

Connectors

TypeNameDefaultDescription
Buildings.BoundaryConditions.WeatherData.BusweaBus (from PartialCoolingTowersSubsystem)Weather data bus

Components

TypeNameDefaultDescription
Buildings.Fluid.Interfaces.PartialTwoPortInterfacetow (from PartialCoolingTowersSubsystem)
Buildings.Fluid.Movers.FlowControlled_m_flowpum (from PartialCoolingTowersSubsystem)Pump for condenser water loop
Buildings.BoundaryConditions.WeatherData.ReaderTMY3weaDat (from PartialCoolingTowersSubsystem)
Buildings.Controls.OBC.CDL.Reals.Switchswi (from PartialCoolingTowersSubsystem)Control switch for chilled water pump
Buildings.Controls.OBC.CDL.Reals.Sources.ConstantTSwi (from PartialCoolingTowersSubsystem)Switch temperature for switching tower pump on
Buildings.Controls.OBC.CDL.Reals.Sources.Constantzer (from PartialCoolingTowersSubsystem)Zero flow rate
Buildings.Controls.OBC.CDL.Reals.Sources.Constantm_flow (from PartialCoolingTowersSubsystem)Water flow rate
Buildings.Fluid.MixingVolumes.MixingVolumevol (from PartialCoolingTowersSubsystem)
Buildings.Fluid.Sources.Boundary_pTexp (from PartialCoolingTowersSubsystem)Expansion vessel
Modelica.Thermal.HeatTransfer.Sources.FixedHeatFlowfixHeaFlo (from PartialCoolingTowersSubsystem)Fixed heat flow rate
Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensorTVol (from PartialCoolingTowersSubsystem)Water temperature
Buildings.Fluid.Sensors.TemperatureTwoPortTEnt (from PartialCoolingTowersSubsystem)Water entering temperature
Buildings.Controls.OBC.CDL.Reals.Hysteresishys (from PartialCoolingTowersSubsystem)Pump on-off control
Buildings.Controls.OBC.CDL.Reals.Subtractsub (from PartialCoolingTowersSubsystem)Inputs different

Revisions

  • August 6, 2020 by Jing Wang:
    First implementation.