1479 An air-conditioning system is to take in air at 1 atm, 34C, and 70
percent relative humidity and deliver it at 22C and 50 percent relative
humidity. The air flows first over the cooling coils, where it is cooled and
dehumidified, and then over the re
14112 A wet cooling tower is to cool 60 kg/s of water from 40 to 26C.
Atmospheric air enters the tower at 1 atm with dry- and wet-bulb
temperatures of 22 and 16C, respectively, and leaves at 34C with a
relative humidity of 90 percent. Using the psychromet
1446 The air in a room has a pressure of 1 atm, a dry-bulb temperature of
24C, and a wet-bulb temperature of 17C. Using the psychrometric chart,
determine (a) the specific
humidity, (b) the enthalpy (in kJ/kg dry air), (c) the relative humidity, (d ) the
14-31 The dry- and wet-bulb temperatures of atmospheric air at 95 kPa are
25 and 17C, respectively. Determine (a) the specific humidity, (b) the
relative humidity, and (c) the enthalpy of the air, in kJ/kg dry air.
14103 Two airstreams are mixed steadily and adiabatically. The first stream
enters at 32C and 40 percent relative humidity at a rate of 20 m3/min, while
the second stream enters at 12C and 90 percent relative humidity at a rate
of 25 m3/min. Assuming that
1473 Air at 1 atm, 15C, and 60 percent relative humidity is first heated to
20C in a heating section and then humidified by introducing water vapor.
The air leaves the humidifying section at 25C and 65 percent relative
humidity. Determine (a) the amount o