model VariableThermalConductor "Lumped thermal element transporting heat without storing it with variable conductance"
input Modelica.Blocks.Interfaces.RealInput G(unit = "W/K") "Variable thermal conductance"
annotation (Placement(
visible = true,
transformation(
origin = {0, 80},
extent = {
{-20, -20},
{20, 20}},
rotation = -90),
iconTransformation(
origin = {0, 80},
extent = {
{-20, -20},
{20, 20}},
rotation = -90)));
extends Modelica.Thermal.HeatTransfer.Interfaces.Element1D;
equation
Q_flow = G * dT;
annotation (
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Rectangle(
fillColor = {192, 192, 192},
pattern = LinePattern.None,
fillPattern = FillPattern.Backward,
extent = {
{-90, 70},
{90, -70}}),
Line(
points = {
{-90, 70},
{-90, -70}},
thickness = 0.5),
Line(
points = {
{90, 70},
{90, -70}},
thickness = 0.5)}),
Diagram(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Line(
points = {
{-80, 0},
{80, 0}},
color = {255, 0, 0},
thickness = 0.5,
arrow = {Arrow.None, Arrow.Filled}),
Text(
lineColor = {255, 0, 0},
extent = {
{-100, -20},
{100, -40}},
textString = "Q_flow"),
Text(
extent = {
{-100, 40},
{100, 20}},
textString = "dT = port_a.T - port_b.T")}),
Documentation(info = "<html>\n <p>\n This is a model for transport of heat without storing it. The thermal conductance is set by an input.\n </p></html>"));
end VariableThermalConductor;