Repeat Prob. 14-131 for a total pressure of 90 kPa for air.
Prob. 14-131
Air enters an air-conditioning system that uses refrigerant-134a at 30oC and 70 percent relative humidity at a rate of 4m3/min. The refrigerant enters the cooling section at 700 kPa with a quality of 20 percent and leaves as saturated vapor. The air is cooled to 20oC at a pressure of 1 atm. Determine
(a) The rate of dehumidification.
(b) The rate of heat transfer.
(c) The mass flow rate of the refrigerant.