WOLFRAM SYSTEMMODELER

ThermalConductor

Lumped thermal element transporting heat without storing it

Wolfram Language

In[1]:=
Click for copyable input
SystemModel["Modelica.Thermal.HeatTransfer.Components.ThermalConductor"]
Out[1]:=

Information

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

This is a model for transport of heat without storing it; see also: ThermalResistor. It may be used for complicated geometries where the thermal conductance G (= inverse of thermal resistance) is determined by measurements and is assumed to be constant over the range of operations. If the component consists mainly of one type of material and a regular geometry, it may be calculated, e.g., with one of the following equations:

  • Conductance for a box geometry under the assumption that heat flows along the box length:

        G = k*A/L
        k: Thermal conductivity (material constant)
        A: Area of box
        L: Length of box
        
  • Conductance for a cylindrical geometry under the assumption that heat flows from the inside to the outside radius of the cylinder:

        G = 2*pi*k*L/log(r_out/r_in)
        pi   : Modelica.Constants.pi
        k    : Thermal conductivity (material constant)
        L    : Length of cylinder
        log  : Modelica.Math.log;
        r_out: Outer radius of cylinder
        r_in : Inner radius of cylinder
        
    Typical values for k at 20 degC in W/(m.K):
      aluminium   220
      concrete      1
      copper      384
      iron         74
      silver      407
      steel        45 .. 15 (V2A)
      wood         0.1 ... 0.2

Connectors (2)

port_a

Type: HeatPort_a

Description:

port_b

Type: HeatPort_b

Description:

Parameters (1)

G

Value:

Type: ThermalConductance (W/K)

Description: Constant thermal conductance of material

Used in Examples (11)

HeatingMOSInverter

Heating MOS Inverter

HeatingNPN_OrGate

Heating NPN Or Gate

HeatingResistor

Heating resistor

HeatingRectifier

Heating rectifier

DCPM_Cooling

Test example: Cooling of a DCPM motor

IndirectCooling

Example: indirect cooling circuit

OneMass

Example: cooling of one hot mass

TwoMass

Example: cooling of two hot masses

TwoMasses

Simple conduction demo

ControlledTemperature

Control temperature of a resistor

Motor

Second order thermal model of a motor