Q2 Water exiting the condenser of a power plant at 45C enters a cooling tower with a mass flow rate of 15000kg/s. A stream of cooled water is returned to the condenser from the cooling tower with the same flow rate. Make-up water is added in a separate stream at 20C. Atmospheric air enters the cooling tower at 30C with a wet bulb temperature of 20C. The volumetric flow rate of moist air into the cooling tower is 8000m3/s. Moist air exits the tower at 35C and 80% relative humidity. Assume: - The cooling tower operates under steady state conditions. - Change in kinetic energy (KE) and potential energy (PE)=0 - Cooling tower is rigid and adiabatic. - Assume all liquid water is saturated. - The pressure is constant throughout the cooling tower with an atmospheric pressure of 101.3kPa. Note: You need to show and indicate all the data points from the psychrometric chart. Determine the following: i) The mass flow rate of dry air. [3 marks] ii) The mass flow rate of make-up water. [6 marks] iii) The temperature of the cooled liquid water exiting the cooling tower. [16 marks] Total [25