Twenty kilograms of air at 30 8C and a humidity of 90% enter a window air-conditioning unit

Question:

Twenty kilograms of air at 30 8C and a humidity of 90% enter a window air-conditioning unit each minute, illustrated in Fig. 11.31. The air leaves the air conditioner at 18 8C with a humidity of 40%. What is the change in the humidity ratio for this process? What mass of water is removed from this system each hour? Use the psychrometric chart.