Hot oil is to be cooled in a multipass shell-and-tube heat exchanger by water. The oil flows through the shell, with a heat transfer coefficient of π h_o = 35 , Wm²°C π, and the water flow...
a) 12.7 Wm²°C
b) 13.4 Wm²°C
c) 14.2 Wm²°C
d) 15.6 Wm²°C