Air at 308C, 1.05 bar, and 80% relative humidity enters a

Chapter 12, Problem 12.60

(choose chapter or problem)

Air at \(30^{\circ} \mathrm{C}\), 1.05 bar, and 80% relative humidity enters a dehumidifier operating at steady state. Moist air exits at \(15^{\circ} \mathrm{C}\), 1 bar, and 95% relative humidity. Condensate exits in a separate stream at \(15^{\circ} \mathrm{C}\). A refrigerant flows through the cooling coil of the dehumidifier with an increase in its specific enthalpy of 100 kJ per kg of refrigerant flowing. Heat transfer between the humidifier and its surroundings and kinetic and potential energy effects can be ignored. Determine the refrigerant flow rate, in kg per kg of dry air.