6.4.1 Length of U-tubes
Number of U-tubes = 934 (as calculated previously)
The tubes are 19.05 mm outside diameter so the surface area per metre length is
π х 0.01905 = 0.06 m2/m
Average U-tube length between tubeplates
= 14507(0.06 x 934) = 25.9 m
Average tube bundle length = 12.94 m, which determines the shell length.