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University Of California, Davis Operations And Supply Chain Management Assignment Help - A twin-tube


Question - A twin-tube, counter flow heat exchanger operates with balanced flow rates of 0.003 kg/s for the hot
and cold airstreams. The cold stream enters at 280 K and must be heated to 340 K using hot air at
360 K. The average pressure of the airstreams is 1 atm and the maximum allowable pressure drop for
the cold air is 10 kPa. The tube walls may be assumed to act as fins, each with an efficiency of 100%.
(a) Determine the tube diameter D and length L that satisfy the prescribed heat transfer and pressure
drop requirements.
(b) For the diameter D and length L found in part (a) generate plots of the cold stream outlet
temperature, the heat transfer rate, and pressure drop as a function of balanced flow rates in the
range from 0.002 to 0.004 ...Read More

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