+1 862 207 3288 A drier requires 1.5 m3/s of air at 338 K, 1 atm, and 20% relative humidity. This is to be prepared from air at 300 K dry-bulb, 291 K wet-bulb temperatures by direct injection of steam into the airstream followed by passage of the air over steam-heated finned tubes. The available steam is saturated at 383 K. Calculate the kilograms of steam per second required for (a) direct injection, and (b) the heat exchanger. Assume that in the heat exchanger the steam condenses at constant temperature.
