Water at a flow rate of 0.215 kg/s is cooled from 70°C to 30°C by passing it through a thin- walled tube of diameter D-5

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Water At A Flow Rate Of 0 215 Kg S Is Cooled From 70 C To 30 C By Passing It Through A Thin Walled Tube Of Diameter D 5 1 (82.92 KiB) Viewed 44 times

Water at a flow rate of 0.215 kg/s is cooled from 70°C to 30°C by passing it through a thin- walled tube of diameter D-50 mm and maintaining a coolant at 15°C in cross flow over the tube. Water V = 2 m/s Air Too = 15 °C Tm,o = 30 °C V = 20 m/s D = 0.05 m- L Water Tm,i = 70 °C m = 0.215 kg/s a) The conditions described in this problem fits into which CASE in internal convection problems? b) If you look at the big picture in this problem how would you calculate the overall convective heat transfer? Please write the equation without putting the numerical values d) c) Considering the fact that conv=AUAT how would you calculate the required tube length for the water in cross flow? Please write the equation without putting the numerical values What is U in the above equation? How would you calculate that? Please write the equation without putting the numerical values (Note that the conduction coefficient of the tube is ignored)