Air at 28°C db-temperature and 55% relative humidity enters a chilled water cooling coil with a mass flow rate of 3 kgsí1 . Chilled water entering at 10°C flows in the opposite direction with a mass...

Air at 28°C db-temperature and 55% relative humidity enters a chilled water cooling coil with a mass flow rate of 3 kgsí1 . Chilled water entering at 10°C flows in the opposite direction with a mass flow rate of 2.8 kgsí1 . The leaving water temperature is 17°C. The outside and inside heat transfer coefficients are 0.06 kWmí2 Kí1 and 3 kWmí2 Kí1 respectively. The ratio of the outside to inside heat transfer areas is 16. Calculate (i) the temperature of the air when condensation just begins, (ii) the total area of the coil, and (iii) the cooling capacity.