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Engineering · Mechanical Engineering
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Problem #205 t internal flow convection) Water supplied to an experimental system is required to be at 200°c,so itis passed through an insulated circular tube, which is heated by an electric heating tape. The heat supplied from the heating tape to the outer tube surface is equivalent to the constant thermal flux q, 2x 10 w/m2. he inner diameter of the tube is 5 cm, and the length is 10 m. The water mass flow rate is m 0.05 kg/s, and the inlet mean water temperature is Tm, 25 °C. (a) What is the mean water temperature at the tube outlet? Does this design meet the experimental system requirement? (b) (extra credit 5 pt) How would you change the water mass flow rate to adjust the output temperature precisely to 200 oC? electric heating l q, circular tube water
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