15 deg C 0.5 kg/s 90 deg C 60 deg C 10 deg C A parallel-flow double-pipe heat exchanger with a thin-walled inner tube is

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15 Deg C 0 5 Kg S 90 Deg C 60 Deg C 10 Deg C A Parallel Flow Double Pipe Heat Exchanger With A Thin Walled Inner Tube Is 1 (74.67 KiB) Viewed 12 times

15 deg C 0.5 kg/s 90 deg C 60 deg C 10 deg C A parallel-flow double-pipe heat exchanger with a thin-walled inner tube is used to cool down water from 90°C to 60°C at a rate of 0.5 kg/s. The cold-water flowing on the outer pipe has a temperature of 10 °C at the inlet and 15 °C at the outlet. (Water thermal properties could be assumed as constant.) [15] a) Calculate the cold-water mass flow rate. [25] b) Calculate the overall heat transfer coefficient if the length of the inner tube is 20 m and the inner tube diameter is 2 cm.