Heat transfer rate:
When a temperature gradient exists in a body experience has shown that there
is an energy transfer from the high temperature region to the low temperature
region. We say that the energy is transferred by conduction and that the heat
transfer rate per unit area is proportional to the normal temperature gradient.
Fin efficiency:
Fin efficiency is defined as the ratio of the actual heat transferred to the
heat which would be transferred if entire fin area were at base temperature.
It is denoted by .
Fin effectiveness:
Fin effectiveness is defined as the ratio of the heat transfer rate that would
be obtained if the entire fin surface area were to be maintained at the same
temperature as the primary surface. It is denoted by .
Design and manufacturing Of fins: