Question: Hot oil ( Cp = 2 2 0 0 J / kg . K ) entering at 1 6 0 C is cooled in a

Hot oil (Cp =2200 J/kg.K) entering at 160C is cooled in a heat exchanger by water entering at 18C. The heat exchanger has a 2-shell pass and 12-tube pass arrangement. The tubes are thin walled and are made of copper with a diameter of 1.8 cm. The length of each tube pass in the heat exchanger is 3 m. Water flows through the tubes at a total rate of 0.1 kg/s, and the oil flows through the shell at a rate of 0.2 kg/s. The convective coefficient for oil in the shell side of the heat exchanger is ho =400 W/m2.K. Determine the rate of heat transfer in the heat exchanger and the outlet temperatures of the water and oil. Notes: You will need to start by guessing the outlet water temperature. Only two iterations are required to show your method to solve the problem. Properties of water can be found in Attachment 3.

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