In a tube bundle heat exchanger, water with a flow rate
of 5 kg / s will be heated from 80 ° C to 100 ° C. Heating is
provided by the condensation of a 250 kN / m2 steam. The heat
exchanger consists of two pipes. The pipe outer diameter is 32 mm.
Take the total heat transfer coefficient as 1752 W / m2 ° C and
calculate the required pipe length.