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In a double pipe heat exchanger, shown in the figure, the total heat transferred from hot fluid (oil) to the cold fluid (water) is 200 kW. The overall heat transfer coefficient is given by 750 W/(m2 0C). Determine the heat transfer area in the heat exchanger. Also calculate the number of transfer unit (NTU) if the heat capacity of oil is 2615 W/0C and that of water is 3914 W/ 0C.
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