Determine the air outlet temperature

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Reference no: EM13942710

Heated air required for a food-drying process is generated by passing ambient air at 20°C through long, circular tubes (D = 50 mm, L = 5 m) housed in a steam condenser. Saturated steam at atmospheric pres- sure condenses on the outer surface of the tubes, maintaining a uniform surface temperature of 100°C.

(a) If an airflow rate of 0.01 kg/s is maintained in each tube, determine the air outlet temperature Tm,o and the total heat rate q for the tube.

(b) The air outlet temperature may be controlled by adjusting the tube mass flow rate. Compute and a more appropriate temperature. plot Tm,o as a function of m for 0.005 m

A range of tube lengths from 4 to 7 m is available to the engineer designing this condenser.

Generate a plot to show what coolant mean velocities are possible if the water outlet temperature is to remain at the value found for part (b). All other conditions remain the same.

Reference no: EM13942710

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