In a 3m long shell-tube-type multitubular heat exchanger, TC-1.2, use water (cp=4188 J/Kg.K) with coef. of film 75 W/m2

[answerhappygod]

In a 3m long shell-tube-type multitubular heat exchanger,
TC-1.2, use water (cp=4188 J/Kg.K) with coef. of film 75 W/m2 .K,
with a mass flow of 1500 Kg/h, is heated from 10 oC to 28oC that
exchanges heat with oil (cp= 1897 J/Kg.K) with coef. from film 115
W/m2 .K, and enters the temperature of 90 oC and leaves at 60oC.
Considering soot factor of 0.002 for each side is asked: a) Oil
mass flow;
b) A necessary heat exchange area for the exchanger;
c) The number of tubes, the external diameter being 0.6".