modelSimpleValve

Extends from AixLib.Obsolete.BaseClasses.ObsoleteModel (Icon for classes that are obsolete and will be removed in later versions), AixLib.Fluid.Interfaces.PartialTwoPortTransport (Partial element transporting fluid between two ports without storage of mass or energy).

Information

Model for a simple valve.

Simple valve model which describes the relationship between mass flow and pressure drop acoordinh to the Kvs Value.

Type	Name	Default	Description
Real	Kvs	1.4	Kv value at full opening (=1)
Assumptions
Boolean	allowFlowReversal (from PartialTwoPort)	true	= false to simplify equations, assuming, but not enforcing, no flow reversal
Advanced
Modelica.Units.SI.PressureDifference	dp_start (from PartialTwoPortTransport)	0	Guess value of dp = port_a.p - port_b.p
Medium.MassFlowRate	m_flow_start (from PartialTwoPortTransport)	0	Guess value of m_flow = port_a.m_flow
Medium.MassFlowRate	m_flow_small (from PartialTwoPortTransport)		Small mass flow rate for regularization of zero flow
Advanced › Diagnostics
Boolean	show_T (from PartialTwoPortTransport)	true	= true, if temperatures at port_a and port_b are computed
Boolean	show_V_flow (from PartialTwoPortTransport)	true	= true, if volume flow rate at inflowing port is computed

Type	Name	Description
Modelica.Fluid.Interfaces.FluidPort_a	port_a (from PartialTwoPort)	Fluid connector a (positive design flow direction is from port_a to port_b)
Modelica.Fluid.Interfaces.FluidPort_b	port_b (from PartialTwoPort)	Fluid connector b (positive design flow direction is from port_a to port_b)
Modelica.Blocks.Interfaces.RealInput	opening	valve opening

Type	Name	Default	Description
Medium.MassFlowRate	m_flow (from PartialTwoPortTransport)		Mass flow rate in design flow direction
Modelica.Units.SI.PressureDifference	dp (from PartialTwoPortTransport)		Pressure difference between port_a and port_b (= port_a.p - port_b.p)
Modelica.Units.SI.VolumeFlowRate	V_flow (from PartialTwoPortTransport)	m_flow/Modelica.Fluid.Utilities.regStep(m_flow, Medium.density(Medium.setState_phX(p = port_a.p, h = inStream(port_a.h_outflow), X = inStream(port_a.Xi_outflow))), Medium.density(Medium.setState_phX(p = port_b.p, h = inStream(port_b.h_outflow), X = inStream(port_b.Xi_outflow))), m_flow_small)	Volume flow rate at inflowing port (positive when flow from port_a to port_b)
Medium.Temperature	port_a_T (from PartialTwoPortTransport)	Modelica.Fluid.Utilities.regStep(port_a.m_flow, Medium.temperature(Medium.setState_phX(p = port_a.p, h = inStream(port_a.h_outflow), X = inStream(port_a.Xi_outflow))), Medium.temperature(Medium.setState_phX(port_a.p, port_a.h_outflow, port_a.Xi_outflow)), m_flow_small)	Temperature close to port_a, if show_T = true
Medium.Temperature	port_b_T (from PartialTwoPortTransport)	Modelica.Fluid.Utilities.regStep(port_b.m_flow, Medium.temperature(Medium.setState_phX(p = port_b.p, h = inStream(port_b.h_outflow), X = inStream(port_b.Xi_outflow))), Medium.temperature(Medium.setState_phX(port_b.p, port_b.h_outflow, port_b.Xi_outflow)), m_flow_small)	Temperature close to port_b, if show_T = true