WOLFRAM SYSTEM MODELER
ThermalConductorLumped thermal element transporting heat without storing it |
SystemModel["Modelica.Thermal.HeatTransfer.Components.ThermalConductor"]
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
G |
Value: Type: ThermalConductance (W/K) Description: Constant thermal conductance of material |
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port_a |
Type: HeatPort_a Description: Thermal port for 1-dim. heat transfer (filled rectangular icon) |
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port_b |
Type: HeatPort_b Description: Thermal port for 1-dim. heat transfer (unfilled rectangular icon) |
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