•Before the cooler or heat sink can be selected, the cooling requirements must be defined. This includes
–determining the amount of heat to be pumped. This includes the heat load from whatever you are trying to cool, the Joulean heat of the TEC, and parasitics from the hot side to the cold side.
•Note: additional parasitics from the hot side to the final thermal sink (e.g.- radiator) must be added for the total heat rejection load. Convection/radiation from the hot side to the cold side, along with back conduction through the TEC itself.
•Minimizing the heat load allows the cooler to achieve colder temperatures or reduces the power required to reach the defined cooling level.
•For heating/cooling applications, focus first on the cooling side.
–If you have enough capacity for cooling, you should have plenty for heating.
•Calculate/estimate total heat loads
–TEC hot side
–TEC cold side
–Available TEC power
–Physical (space, weight, etc.) limitations
•Determine number of stages required
•Select an appropriate TEC