A condenser at the top of a distillation column operated at 1 atm absolute pressure is to be designed to condense 0.50 kg/s of essentially pure isopropyl alcohol using cooling water entering the condenser at 25°C and leaving at 35°C. As a rough approximation, the heat transfer rate in the condenser is given by the equation:

where A is the heat transfer area, T_iPA is the temperature of the condensing isopropyl alcohol, and T_w,avg is the average temperature of the cooling water.

(a) Determine the heat transfer rate and the flow rate of the cooling water.

(b) Determine the heat transfer area required for the heat exchanger if the heat transfer coefficient is h = 1,000 W/m² K.

(c) Suppose that the condenser is made up of tubes that are 2.5 cm in diameter and 1.5 m long.
How many tubes will be required for the heat exchanger?

Transcribed Image Text:

Q~ Ah(TIPA-Twavg)