Solve the following:
Q: A tube bank uses an aligned arrangement of 30-mm-diameter tubes with ST = SL = 60 mm and a tube length of 1 m. There are 10 tube rows in the flow direction (NL = 10) and 7 tubes per row (NT = 7). Air with upstream conditions of T8 = 27°C and V = 15 m/s is in cross flow over the tubes, while a tube wall temperature of 100°C is maintained by steam condensation inside the tubes. Determine the temperature of air leaving the tube bank, the pressure drop across the bank and the fan power requirement.