A heat exchanger is being designed to cool a gas stream from 140°F (60°C) to 80°F (27°C) using cooling water that enters at 60°F (15.6°C) and exits at 70°F (21°C). Assuming heat duty and overall heat...

A heat exchanger is being designed to cool a gas stream from 140°F (60°C) to 80°F (27°C) using cooling water that enters at 60°F (15.6°C) and exits at 70°F (21°C). Assuming heat duty and overall heat transfer coefficients are constant over the temperature ranges for both gas and water, what will be the relative difference in heat transfer area required if cocurrent flow is selected instead of countercurrent flow?