Steam in a heating system flows through tube whose outerdiameter is 10 cm and whose walls are
maintained at a temperature of 150°C. Circular aluminum alloy2024-T6 fins (k = 186 W/m · °C)
of outer diameter 15 cm and constant thickness 2 mm are attached tothe tube. Heat is transferred
to the surrounding air at T∞ = 25°C, with a heat transfercoefficient of 50 W/m2 C . If the total
tube length is 5 m and spacing between fins is 6 mm thendetermine:
a. The total number of fins to be installed on tube
b. The increase in heat transfer rate as a result of addingfins
c. Overall effectiveness of the fined surface
