A. parallel-flow double-pipe heat exchanger is to heat water from 20∘C to 80∘C at a mass flow rate of 1.2 kg/s. The neat

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A Parallel Flow Double Pipe Heat Exchanger Is To Heat Water From 20 C To 80 C At A Mass Flow Rate Of 1 2 Kg S The Neat 1 (66.7 KiB) Viewed 37 times

A. parallel-flow double-pipe heat exchanger is to heat water from 20∘C to 80∘C at a mass flow rate of 1.2 kg/s. The neating is to be accomplished by geothermal water available at 160∘C at a mass flow rate of 2 kg/s. The inner tube is thin-walleci and has a diameter of 15 mm. If the overall heat transfer coefficient of the heat exchanger is 640 W/m2 K and the specific heats of water and geothermal fluid is 4.18 and 4.31 kJ/kgK, respectively, determine the length of the heat exchanger required to achieve the desired heating. Comment on the practicability of your answer and suggest possible other solutions to achieve the desired heating. rigure s: Parallel-tow heat exchanger