Question 5 6 pts Warm water enters a cooling tower at 36°C at a mass flow rate of 54.3 kg/s. The air entering at state 1

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Question 5 6 Pts Warm Water Enters A Cooling Tower At 36 C At A Mass Flow Rate Of 54 3 Kg S The Air Entering At State 1 1 (98.29 KiB) Viewed 41 times

Question 5 6 pts Warm water enters a cooling tower at 36°C at a mass flow rate of 54.3 kg/s. The air entering at state 1 has h₁ = 42.9 kJ/kg da and w₁ = 0.008 kg v/kg da. The air leaving the cooling tower at state 2 has h₂ = 106.8 kJ/kg da and w2 = 0.026 kg v/kg da. The make up water is supplied at 25°C and the mass flow rate of dry air is 50.3 kg da/s. What is the temperature of the cooled water leaving the tower? Express your answer in °C. Question 7 6 pts How much of a warm air stream at 32°C, 60% relative humidity should be mixed with 4.3 kg da/s of a cold air stream at 15°C, 80% relative humidity to obtain mixed air at 25°C? Express your answer in kg da/s. Assume the mixing process is adiabatic and at standard atmospheric pressure. In your written solution, draw the process in the psychrometric chart. Question 6 6 pts Moist air initially at 101 kPa, 35°C db, 20% relative humidity undergoes a sensible cooling process until the dry bulb temperature is 14°C. For a moist air mass flow rate of 7.5 kg/s, what is the rate of heat removal for this process? Express your answer in kW. In your written solution, draw the process in the psychrometric chart, and show the initial and final state and the values obtained from the chart. Question 8 6 pts Moist air undergoes a heating and humidification process at a pressure of 101.325 kPa from an initial state of 15°C db and 70% relative humidity to a final state at 22°C and 60% relative humidity. If the mass flow rate of the air at the initial state is 23.4 kg da/s, what is the increase in the water content of the air? Express your answer in kg/s. In your written solution, draw the process in the psychrometric chart, show the initial and final state and the values obtained from the chart.