5.39 A STHX has 2-tube passes inside of a 29 in. shell. The tubes are 1-in. 15 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/h. Determine the following:

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

b. Number of tubes in the heat exchanger

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