blockCtrPumpVFlow

Volume Flow Set Point Controller for variable Speed pumps

Information

Simple controller for Throttle and ThrottlePump circuit that is based on a PID controller. The controlled variable needs to be connected to vFlowAct.

The controller adjusts the pump speed to archive the specified volume flow

Type	Name	Default	Description
Boolean	useExternalVset	false	If True, set Volume Flow can be given externally
Modelica.Units.SI.VolumeFlowRate	vFlowSetCon	0.01	Volume Flow in m³/s set point of consumer
Real	k	100	Gain of controller
Modelica.Units.SI.Time	Ti	30	Time constant of Integrator block
Modelica.Units.SI.Time	Td	4	Time constant of Derivative block
Modelica.Units.NonSI.AngularVelocity_rpm	rpm_pump_max	2000	Rpm of the Pump
Boolean	reverseAction	true	Set to true if heating system, and false for cooling system
PID
Modelica.Blocks.Types.Init	initType	.Modelica.Blocks.Types.Init.InitialState	Type of initialization (1: no init, 2: steady state, 3: initial state, 4: initial output)
Real	xi_start	0	Initial or guess value value for integrator output (= integrator state)
Real	xd_start	0	Initial or guess value for state of derivative block
Real	y_start	0	Initial value of output

Type	Name	Description
Modelica.Blocks.Interfaces.RealInput	vFlowAct	Connector of measurement input signal
Modelica.Blocks.Interfaces.RealInput	vFlowSet	Connector of second Real input signal
BaseClasses.HydraulicBus	hydraulicBus
Modelica.Blocks.Sources.Constant	constVflowSet
AixLib.Controls.Continuous.LimPID	PID
Modelica.Blocks.Logical.GreaterThreshold	pumpSwitchOff
Modelica.Blocks.Sources.Constant	constValvSet