CAN YOU OPEN THE LOCK
VSING THESE CLUES?
ONE DICIT IS RIGHT
AND IN IS PLACE
ONE DICIT IS RIENT
BUT IN TE WRANG PLACE
The biciS ARE RIGHT
BUT BOTH ARE IN THE
WRONG ME.
ALL DICITS ARE WRONG
ONE DIGIT IS RENT
BUT IN THE WRING PLACE.

Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 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. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?