WOLFRAM SYSTEM MODELER

Valve

Simple valve

Wolfram Language

In[1]:=

SystemModel["Modelica.Thermal.FluidHeatFlow.Components.Valve"]

Out[1]:=

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Simple controlled valve.

Standard characteristic Kv=f (y) is given at standard conditions (dp0, rho0),

where:

Flow resistance under real conditions is calculated by

V_flow**2 * rho / dp = Kv(y)**2 * rho0 / dp0

medium	Value: FluidHeatFlow.Media.Medium() Type: Medium Description: Medium in the component
m	Value: Type: Mass (kg) Description: Mass of medium
T0	Value: Type: Temperature (K) Description: Initial temperature of medium
T0fixed	Value: false Type: Boolean Description: Initial temperature guess value or fixed
tapT	Value: 1 Type: Real Description: Defines temperature of heatPort between inlet and outlet temperature
LinearCharacteristic	Value: Type: Boolean Description: Type of characteristic
y1	Value: Type: Real Description: Max. valve opening
Kv1	Value: Type: VolumeFlowRate (m³/s) Description: Max. flow @ y = y1
kv0	Value: Type: Real Description: Leakage flow / max.flow @ y = 0
dp0	Value: Type: Pressure (Pa) Description: Standard pressure drop
rho0	Value: Type: Density (kg/m³) Description: Standard medium's density
frictionLoss	Value: Type: Real Description: Part of friction losses fed to medium

T	Type: Temperature (K) Description: Outlet temperature of medium
T_a	Type: Temperature (K) Description: Temperature at flowPort_a
T_b	Type: Temperature (K) Description: Temperature at flowPort_b
dT	Type: TemperatureDifference (K) Description: Temperature increase of coolant in flow direction

	flowPort_a	Type: FlowPort_a Description: Filled flow port (used upstream)
	flowPort_b	Type: FlowPort_b Description: Hollow flow port (used downstream)
	y	Type: RealInput Description: 'input Real' as connector