4.9-2. Cooling Oil by Water in an Exchanger. Oil flowing at the rate of 5.04 kg/s (Cpm = 2.09 kJ/kg K) is cooled in a 1-2 heat exchanger from 366.5 K to 344.3 K by 2.02 kg/s of water entering at 283.2 K. The overall heat-transfer coefficient U is 340 W/m². K. Calculate the area required. (Hint: A heat balance must first be made to determine the outlet water temperature.)

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