modelPartialHydraulicModule

Base class for hydraulic module.

Extends from AixLib.Fluid.Interfaces.PartialFourPort (Partial model with four ports).

Information

Admix circuit with a replaceable pump model for the distribution of hot or cold water. All sensor and actor values are connected to the hydraulic bus.

Characteristics

There is a connecting pipe between distributer and collector of manifold so that the pressure difference between them becomes insignificant. The main pump only works against the resistance in the main circuit.

The mass flow in primary and secondary circuits stay constant.

The secondary circuits do not affect each other when switching operational modes.

August, 2018, by Alexander Kümpel:
First implementation

Parameters

Type	Name	Default	Description
Assumptions
Boolean	allowFlowReversal1 (from PartialFourPort)	true	= false to simplify equations, assuming, but not enforcing, no flow reversal for medium 1
Boolean	allowFlowReversal2 (from PartialFourPort)	true	= false to simplify equations, assuming, but not enforcing, no flow reversal for medium 2
Boolean	allowFlowReversal	true	= true to allow flow reversal, false restricts to design direction (port_a -> port_b)
Parameters
String	pipeModel	"SimplePipe"
Pipes
Modelica.Units.SI.Length	length		Pipe length of all pipes (can be overwritten in each pipe)
DataBase.Pipes.PipeBaseDataDefinition	parameterPipe	AixLib.DataBase.Pipes.Copper.Copper_6x1()	Pipe type and diameter (can be overwritten in each pipe)
DataBase.Pipes.InsulationBaseDataDefinition	parameterIso	AixLib.DataBase.Pipes.Insulation.Iso50pc()	Insulation Type (can be overwritten in each pipe)
Actuators
Real	Kv		Kv value of valve (can be overwritten in the valve)
Nominal condition
Modelica.Units.SI.MassFlowRate	m_flow_nominal		Nominal mass flow rate
Initialization
Modelica.Units.SI.Temperature	T_start	303.15	Initialization temperature
Advanced
Modelica.Units.SI.Time	tau	15	Time Constant for PT1 behavior of temperature sensors
Modelica.Units.SI.Temperature	T_amb	298.15	Ambient temperature for heat loss
Modelica.Units.SI.Time	tauHeaTra	parameterPipe.d_iparameterPipe.d_i/410004180(log(parameterPipe.d_i/parameterPipe.d_o)/2/parameterPipe.lambda + log(parameterPipe.d_o/parameterPipe.d_o(1 + parameterIso.factor))/2/parameterIso.lambda + 1/hCon/parameterPipe.d_o(1 + parameterIso.factor))	Time constant for heat transfer of temperature sensors to ambient
Modelica.Units.SI.CoefficientOfHeatTransfer	hCon	4	Convection heat transfer coeffient for all pipes
Dynamics › Equations
Modelica.Fluid.Types.Dynamics	energyDynamics	Modelica.Fluid.Types.Dynamics.DynamicFreeInitial	Type of energy balance: dynamic (3 initialization options) or steady state
Modelica.Fluid.Types.Dynamics	massDynamics	Modelica.Fluid.Types.Dynamics.DynamicFreeInitial	Type of mass balance: dynamic (3 initialization options) or steady state

Connectors

Type	Name	Description
Modelica.Fluid.Interfaces.FluidPort_a	port_a1 (from PartialFourPort)	Fluid connector a1 (positive design flow direction is from port_a1 to port_b1)
Modelica.Fluid.Interfaces.FluidPort_b	port_b1 (from PartialFourPort)	Fluid connector b1 (positive design flow direction is from port_a1 to port_b1)
Modelica.Fluid.Interfaces.FluidPort_a	port_a2 (from PartialFourPort)	Fluid connector a2 (positive design flow direction is from port_a2 to port_b2)
Modelica.Fluid.Interfaces.FluidPort_b	port_b2 (from PartialFourPort)	Fluid connector b2 (positive design flow direction is from port_a2 to port_b2)
BaseClasses.HydraulicBus	hydraulicBus

Components

Type	Name	Default	Description
Modelica.Thermal.HeatTransfer.Sources.PrescribedTemperature	prescribedTemperature
Modelica.Blocks.Sources.Constant	const

Name	Description
Medium	Medium in the system