5.40 The condenser of a steam power plant is a shell and tube design with cooling water flowing through the tubes. The condenser has 4-tube passes inside a 39-in. shell. The tubes are 1½-in. 12 BWG tubes on a 1⅞-in. triangular pitch.

The cooling water enters the heat exchanger at a flow rate of 250 kg/s at an average temperature of 30°C. Determine the Reynolds number of the water flow inside one of the tubes of this heat exchanger.