An air conditioner operating at steady state takes in moist air at 28 oC, 1 bar, and 70%
relative humidity. The moist air first passes over a cooling coil in the dehumidifier unit
and some water vapor is condensed. The rate of heat transfer between the moist air and
the cooling coil is 11 tons. Saturated moist air and condensate streams exit the
dehumidifier at the same temperature. The moist air then passes through a heating
unit, exiting at 24 oC, 1 bar, and 40% relative humidity. Neglecting kinetic and potential
energy effects, determine:
a) the temperature of the moist air exiting the dehumidifier unit, in oC.
b) the volumetric flow rate of the air entering the air conditioner, in m3/min.
c) the rate water is condensed, in kg/min.
d) the rate of heat transfer to the air passing through the heating unit, in kW.