In order to visualize the energy flow in the entire
system, a thermal circuit is constructed, which
is schematically shown in Figure 2.
Rc
and Rh and are the overall thermal
resistances for the internal heat sink and externa
heat sink, respectively. The components of the
air cooler are an internal heat sink, a
thermoelectric module, and an external heat sink
as shown in Figure 2 is the amount of heat
transported at the internal heat sink, which is
actually the design requirement (33 Watts).