Q.1. It is required to fire solid brick in a factory that has a rectangular shape of dimensions 30cm long, 10 centimeters deep and 5 cm high which is initially at 25C and is placed on a tray that is considered adiabatic. To do the cooking, hot air is used (h = 100W/mK). Since operations need to know the cooking time if it is considered finished to 150C.

solid brick k=0,90(W/mk) Cp=0,79 (KJ/Kg K) =1922 kg/m3 a) Brick firing time (3 pts)

Q.2. It is desired to design an exchanger for the cooling operation of 130,000 lb/h of ethanol from 160F to 110F using distilled water at 70 to 130FC. For this there is an exchanger 2-4 29 in. shell ID with 520 34 in. OD tubing with 12 BWG array in Frame with 1 inch pitch. Pipe length is 16 feet and 12 inches of baffle clearance. Up to 10 psi is allowed

of pressure drop. Is the exchanger suitable for the operation? (3 points)