Buildings.DHC.Loads.Cooling.BaseClasses

Package with base classes that are used by multiple models

Information

This package contains base classes that are used to construct the classes in Buildings.DHC.Loads.Cooling.

Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).

Package Content

Name	Description
PartialBuildingWithETS	Partial model with ETS model for cooling and partial building model

Buildings.DHC.Loads.Cooling.BaseClasses.PartialBuildingWithETS

Partial model with ETS model for cooling and partial building model

Buildings.DHC.Loads.Cooling.BaseClasses.PartialBuildingWithETS

Information

This model is composed of a direct controlled energy transfer station model for cooling Buildings.DHC.ETS.Cooling.Direct connected to a repleacable building load model.

Extends from Buildings.DHC.Loads.BaseClasses.PartialBuildingWithPartialETS (Partial model of a building with an energy transfer station).

Parameters

Type	Name	Default	Description
replaceable package MediumSer		Water	Service side medium
replaceable package MediumSerHea_a		Water	Service side medium at heating inlet
replaceable package MediumBui		Water	Building side medium
PartialBuilding	bui	redeclare Buildings.DHC.Load...	Building model
PressureDifference	dpSup	5000	Pressure drop in the ETS supply side [Pa]
PressureDifference	dpRet	5000	Pressure drop in the ETS return side [Pa]
Configuration
Integer	nPorts_heaWat	0	Number of heating water fluid ports
Integer	nPorts_chiWat	1	Number of chilled water fluid ports
Scaling
Real	facMul	1	Multiplier factor
Nominal condition
MassFlowRate	mBui_flow_nominal		Nominal mass flow rate [kg/s]
PID controller
SimpleController	controllerType	Modelica.Blocks.Types.Simple...	Type of controller
Real	k	0.1	Gain of controller [1]
Time	Ti	60	Time constant of integrator block [s]
Time	Td	0.1	Time constant of derivative block [s]
Real	yMax	1	Upper limit of output
Real	yMin	0	Lower limit of output
Assumptions
Boolean	allowFlowReversalSer	false	Set to true to allow flow reversal on service side
Boolean	allowFlowReversalBui	false	Set to true to allow flow reversal on building side

Connectors

Type	Name	Description
FluidPort_a	port_aSerAmb	Fluid connector for ambient water service supply line
FluidPort_b	port_bSerAmb	Fluid connector for ambient water service return line
FluidPort_a	port_aSerHea	Fluid connector for heating service supply line
FluidPort_b	port_bSerHea	Fluid connector for heating service return line
FluidPort_a	port_aSerCoo	Fluid connector for cooling service supply line
FluidPort_b	port_bSerCoo	Fluid connector for cooling service return line
Bus	weaBus	Weather data bus
output RealOutput	QHea_flow	Total heating heat flow rate transferred to the loads (>=0) [W]
output RealOutput	QCoo_flow	Total cooling heat flow rate transferred to the loads (<=0) [W]
output RealOutput	PHea	Power drawn by heating system [W]
output RealOutput	PCoo	Power drawn by cooling system [W]
output RealOutput	PFan	Power drawn by fan motors [W]
output RealOutput	PPum	Power drawn by pump motors [W]
output RealOutput	QFue_flow[nFue]	Fuel energy input rate [W]
input RealInput	TDisRetSet	Setpoint for the minimum district return temperature [K]

Modelica definition

model PartialBuildingWithETS "Partial model with ETS model for cooling and partial building model" extends Buildings.DHC.Loads.BaseClasses.PartialBuildingWithPartialETS( nPorts_chiWat=1, redeclare Buildings.DHC.ETS.Cooling.Direct ets( final mBui_flow_nominal=mBui_flow_nominal, final controllerType=controllerType, final k=k, final Ti=Ti, final Td=Td, final yMax=yMax, final yMin=yMin)); parameter Modelica.Units.SI.MassFlowRate mBui_flow_nominal( final min=0, final start=0.5) "Nominal mass flow rate"; parameter Modelica.Units.SI.PressureDifference dpSup( final min=0, displayUnit="Pa")=5000 "Pressure drop in the ETS supply side"; parameter Modelica.Units.SI.PressureDifference dpRet( final min=0, displayUnit="Pa")=5000 "Pressure drop in the ETS return side"; // Controller parameters parameter Modelica.Blocks.Types.SimpleController controllerType=Modelica.Blocks.Types.SimpleController.PI "Type of controller"; parameter Real k( final min=0, final unit="1")=0.1 "Gain of controller"; parameter Modelica.Units.SI.Time Ti( final min=Modelica.Constants.small)=60 "Time constant of integrator block"; parameter Modelica.Units.SI.Time Td( final min=0)=0.1 "Time constant of derivative block"; parameter Real yMax( final start=1)=1 "Upper limit of output"; parameter Real yMin=0 "Lower limit of output"; Modelica.Blocks.Interfaces.RealInput TDisRetSet( final unit="K", displayUnit="degC") "Setpoint for the minimum district return temperature"; equation connect(TDisRetSet,ets.TDisRetSet); end PartialBuildingWithETS;