Question 4 (25%): An air-conditioning process is shown in the figure below. Atmospheric air with a temperature of 33°C and a relative humidity of 20% is first cooled down to 15°C. From here, it is mixed adiabatically with a stream of recirculated air (STATE 3) having a temperature of 29°Cand a relative humidity of 50% to produce a mixture with a temperature of 20°C and a flow rate of 80 m³/min. Demonstrate appropriate mass and energy balances when needed. Use the provided. psychrometric chart to label the states and draw the process. SUBMIT YOUR CHART FOR GRADING. T₁ =33°C 1-20% COOLING COIL trual Adiabatic T₁ = 20°C MIXING DUCT V₁ = 80 m³/min T₂-15°C T-29°C 1-50% a) Determine the relative humidity of the mixture and the end of the mixing duct. b) Determine the mass flow rate of recirculated air in kg air/s c) Determine rate of heat-transfer in the cooling section in kJ/min ASHRAE Psychrometric Chart No. Normal Temperature Barometric Pressure: 101.325 kPa 01992 American Society of Heating Refrigerating and Air-Conditioning Engineers, Inc. Sea Level 10.0 Scuble h y00 per kilogram day als Dry bulb tempera "C Prepared by Center for Applied Thermodynamic Studies University of FIGURE A-31 Psychrometric chart at 1 atm total pressure. Reprinted by permission of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA; used with permission. -0.70 -0.00 -0.85 0.00 -0.95 1.0 943 APPENDIX 1