model MassFractionsTwoPort "Ideal two port sensor for mass fraction"
extends Modelica.Fluid.Sensors.BaseClasses.PartialFlowSensor;
extends Modelica.Icons.RotationalSensor;
Modelica.Blocks.Interfaces.RealOutput Xi "Mass fraction in port medium"
annotation (Placement(
transformation(
extent = {
{-10, -10},
{10, 10}},
rotation = 90,
origin = {0, 110}),
iconTransformation(
extent = {
{-10, -10},
{10, 10}},
rotation = 90,
origin = {0, 110})));
parameter String substanceName = "water" "Name of mass fraction";
protected
parameter Integer ind(fixed = false) "Index of species in vector of independent mass fractions";
initial algorithm
ind := -1;
for i in 1:Medium.nXi loop
if Modelica.Utilities.Strings.isEqual(Medium.substanceNames[i], substanceName) then
ind := i;
end if;
end for;
assert(0 < ind, "Mass fraction '" + substanceName + "' is not present in medium '" + Medium.mediumName + "'.\n" + "Check sensor parameter and medium model.");
equation
if allowFlowReversal then
Xi = Modelica.Fluid.Utilities.regStep(port_a.m_flow, port_b.Xi_outflow[ind], port_a.Xi_outflow[ind], m_flow_small);
else
Xi = port_b.Xi_outflow[ind];
end if;
annotation (
defaultComponentName = "massFraction",
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Text(
extent = {
{82, 122},
{0, 92}},
textString = "Xi"),
Line(
points = {
{0, 100},
{0, 70}},
color = {0, 0, 127}),
Line(
points = {
{-100, 0},
{-70, 0}},
color = {0, 128, 255}),
Line(
points = {
{70, 0},
{100, 0}},
color = {0, 128, 255})}),
Documentation(
info = "<html>\n<p>\nThis component monitors the mass fraction of the passing fluid.\nThe sensor is ideal, i.e., it does not influence the fluid.\n</p> </html>",
revisions = "<html>\n<ul>\n<li>2011-12-14: Stefan Wischhusen: Initial Release.</li>\n<li>2018-01-04: Stefan Wischhusen: Corrected failure in accessing the named substance.</li>\n</ul>\n</html>"));
end MassFractionsTwoPort;