

THERMAL CALCULATORS
The following thermal calculators are provided to assist you with your thermal management problems.

Slab Thermal Resistance
This onedimensional steadystate heat conduction calculator provides the thermal resistance through the height axis of a solid slab, given uniform heat input and output, and having insulated sidewalls.

Cylinder Thermal Resistance
This onedimensional steadystate heat conduction calculator provides the thermal resistance through the height axis of a solid cylinder, given uniform heat input and output, and having insulated sidewalls.

Hollow Cylinder Thermal Resistance
This onedimensional steadystate heat conduction calculator provides the thermal resistance through the sidewall of a hollow cylinder, given uniform heat input and output, and having insulated ends.

Slab Thermal Resistance With Constriction
This twodimensional steadystate heat conduction calculator provides the thermal resistance through the height axis of a solid slab, flat heat pipes, vapor chambers, or heat spreaders, including the thermal constriction resistance resulting from a heat source that is smaller than the slab, given uniform heat input and output, and having all other surfaces insulated.

Slab Mass Thermal Resistance
This onedimensional transient heat capacitance calculator provides the thermal resistance of a solid slab, given the mass thermal properties, finite heat input, and being fully insulated.

Mass Flow Thermal Resistance
This onedimensional steady heat capacitance calculator provides the thermal resistance of a mass flow system, given the mass thermal properties and flow rate.

Slab Fin Efficiency
This onedimensional steadystate heat conduction calculator provides the fin efficiency or effectiveness of a slab or cuboid shaped fin, given uniform crosssectional area, uniform heat input, and insulated ends.

Pin Fin Efficiency
This onedimensional steadystate heat conduction calculator provides the fin efficiency or effectiveness of a pin or cylindrical shaped fin, given uniform crosssectional area, uniform heat input, and insulated ends.

Forced Convection Heat Sink Thermal Resistance
This steadystate forced convection heat sink calculator provides thermal resistance and pressure drop, given uniform heat input and uniform air flow. This model is based on the fluid properties of air at 50°C, and includes entrance and exit pressure loss effects, and excludes any base conduction resistance.

Solid State Thermoelectric Peltier Cooler Thermal and Electrical Performance
This steadystate calculator provides the thermal and electrical performance of a Bismuth Teluride based solid state thermoelectric Peltier cooling system, as a function of ambient temperature, hot and cold side heat exchanger performance, thermal load, Peltier module (thermopile) geometry, and Peltier electrical parameters.




