Thermal Resistance
Constant thermal resistance in thermal systems.
blockType: AcausalFoundation.Thermal.Elements.Resistance
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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:
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- thermal resistance.
-
- heat flux.
-
- temperature difference between layers.
Thermal resistance is related to other heat transfer values as follows:
Where:
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- 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.
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- thermal conductivity of the material.
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- convective heat transfer coefficient.
-
- radiation coefficient.
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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.