2 a preheater involves the use of condensing steam at 100c on the insi
2. A preheater involves the use of condensing steam at 100°C on the inside of a bank of tubes to heat air that enters at I atm and 25°C. The air moves at 5 m/s in cross flow over the tubes. Each tube is 1 m long and has an outside diameter of 10 mm. The bank consists of 196 tubes in a square, aligned array for which ST = SL= 15 mm. What is the total rate of heat transfer to the air? What is the pressure drop associated with the airflow?
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