2. • AL fins triangle profile are attached to plane
wall whose surface temperature is 250C. The
fin base thickness is 2 mm, and its length is 6
mm. The system is in ambient air at a
temperature of 20C, and the surface
convection is 40 W/m2.K
– What are the fin efficiency and effectiveness?
– What are the heat dissipated per unit width by a
single fin.

3. Twall 250 C
Tair 20 C
.h 40 W/m2.K
2 mm
2 mm
6 mm 6 mm