modelMultipleValves

Parallel arrangement of identical two-way modulating valves

Extends from Buildings.Fluid.Interfaces.LumpedVolumeDeclarations, Buildings.Fluid.Interfaces.PartialTwoPortInterface.

Information

This model represents a set of control valves piped in parallel. An optional fixed resistance may be included in series with each valve.

Type	Name	Default	Description
Integer	nUni		Number of units (branches in the network)
Nominal condition
Modelica.Units.SI.MassFlowRate	mUni_flow_nominal		Nominal mass flow rate (each unit)
Modelica.Units.SI.PressureDifference	dpValve_nominal		Nominal pressure drop of fully open valve (each unit)
Modelica.Units.SI.PressureDifference	dpFixed_nominal	0	Pressure drop of pipe and other resistances that are in series (each unit)
Dynamics › Time needed to open or close valve
Boolean	use_strokeTime	true	Set to true to continuously open and close valve using strokeTime
Modelica.Units.SI.Time	strokeTime	120	Time needed to open or close valve
Modelica.Blocks.Types.Init	init	Modelica.Blocks.Types.Init.InitialOutput	Type of initialization (no init/steady state/initial state/initial output)
Real	y_start	1	Initial position of actuator
Advanced
Boolean	from_dp	false	= true, use m_flow = f(dp) else dp = f(m_flow)
Boolean	linearized	false	= true, use linear relation between m_flow and dp for any flow rate

Type	Name	Description
Buildings.Controls.OBC.CDL.Interfaces.RealInput[nUni]	y	Valve commanded position
Buildings.Controls.OBC.CDL.Interfaces.RealOutput[nUni]	y_actual	Valve returned position
Fluid.FixedResistances.Junction[nUni]	junInl	Fluid junction
Fluid.FixedResistances.Junction[nUni]	junOut	Fluid junction
Fluid.Actuators.Valves.TwoWayEqualPercentage[nUni]	val