Question

Hot oil is to be cooled in a double-tube counter flow heat exchanger. The copper inner tubes have a diameter of 2 cm and negligible thickness. The inner diameter of the outer tube (the shell) is 3 cm. Water flows through the tube at a rate of 0.5 kg/s, and the oil through the shell at a rate of 0.8 kg/s. Taking the average temperatures of the water and oil to be 45 degrees Celsius and 80 degrees Celsius, respectively, determine the overall heat transfer coefficient of this heat exchanger. Include diagram.

Answer 1

Hot oil is to be cooled in a double-tube counter-flow heat

exchanger. The copper inner tubes have a diameter of 2

cm and negligible thickness. The inner diameter of the

outer tube (the shell) is 3 cm. Water flows through the tube

at a rate of 0.5 kg/s, and the oil through the shell at a rate

of 0.8 kg/s. Taking the average temperatures of the water

and the oil to be 45°C and 80°C, respectively, determine

the overall heat transfer coefficient of this heat exchanger.

Step-by-step explanation: