A shell and tube heat exchanger has two tube passes inside of a 29-in shell.
The tubes are 1-in 16 BWG tubes on a 1¼-in square pitch and the heat exchanger contains the maximum amount of tubes allowable. Water at an average temperature of 80°F is flowing through the tubes. The total flow rate of the water is 750,000 lbm/hr. Determine the

a. Clearance, C, between the tubes (in)

b. The number of tubes in the heat exchanger

c. The Reynolds number of the flow inside one of the tubes

d. Determine the answers to (a) through (c) if the tube pitch is 1¼ in triangular instead of square.