1) A counter-flow of shell and tube (1 passes) heat exchanger is used for heating oil (Cp = 2.0 kJ/kg°C) from 30°C to 60

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1 A Counter Flow Of Shell And Tube 1 Passes Heat Exchanger Is Used For Heating Oil Cp 2 0 Kj Kg C From 30 C To 60 1 (34.97 KiB) Viewed 13 times

1) A counter-flow of shell and tube (1 passes) heat exchanger is used for heating oil (Cp = 2.0 kJ/kg°C) from 30°C to 60°C. A water stream (Cp = 4.18 kJ/kg°C) enters the shell-side at 80°C and leaves at 40°C. There are 160 thin-walled tubes, each with a diameter of 2 cm and length of 2 m. The tube-side and shell-side heat transfer coefficients are 1500 and 2400 W/m²K, respectively. (a) Calculate the overall heat transfer coefficient of the heat exchanger. (b) Calculate the rate of heat transfer in this heat exchanger. (c) Calculate the mass flow rates of water and oil. (d) After 2 years of usage with the same mass flow rate from (c), the outlet oil temperature decreases from 60°C to 55°C due to the fouling on the tube surface. Calculate the magnitude of fouling factor (15 marks)