Thermal Resistance
Constant thermal resistance in thermal systems.
Description
Thermal Resistance is an abstract quantity that combines heat conduction, convection and thermal radiation. The Thermal Resistance block allows the modelling of heat transfer in a generalised form, whether it is by conduction, convection, radiation or a combination of these.
Heat transfer equation for the Thermal Resistance block:
Where:
-
- thermal resistance.
-
- heat flux.
-
- temperature difference between layers.
Thermal resistance is related to other heat transfer values as follows:
Where:
-
- is the distance between the layers, i.e. the thickness of the material.
-
- is the area of the cross-section perpendicular to the direction of heat flow.
-
- thermal conductivity of the material.
-
- convective heat transfer coefficient.
-
- radiation coefficient.
-
and - temperatures at ports A and B respectively.
Ports
A - layer A
`heat
Heat port corresponding to layer A.
B - layer B
heat
Heat port corresponding to layer B.
Parameters
Thermal resistance - value of thermal resistance
1.0 K/W (by default)
Thermal resistance value.
Initial value of temperature difference - initial value of temperature difference
0.0 K (by default).
Initial value of temperature difference.
Initial value of heat flow rate - initial value of heat flow rate
0.0 W/(K*m²) (by default).
Initial value of heat flow rate.