An air stream, initially at 41°C and with a relative humidity of 50%, enters an air conditioning unit at 4 m3 /s. The air conditioning unit cools the air stream, condensing out a proportion of the...

An air stream, initially at 41°C and with a relative humidity of 50%, enters an air conditioning unit at 4 m3 /s. The air conditioning unit cools the air stream, condensing out a proportion of the water vapour present, to produce a cool air stream saturated with water vapour. The whole process takes place at 1 atm pressure. Using the psychrometric chart supplied:

a) Find the dew point, wet bulb temperature and humidity of the air before it enters the air conditioning unit.

b) Find the temperature to which the air must be cooled to condense out 5.1 kg/min water.

c) Find the partial pressure of water in the initial air stream, and the vapour pressure of water at 41°C. Charts and tables are not needed to answer this part of the question.

Extracted text: 0.030 0.028 0.026 30°C 0.024 90KJ/kg. 0.022 Psychrometric Chart 80KJ/kg Barometric Pressure 101.325 kPa Basis - per kg of dry air 0,020 0.018 70kJkg 0.016 0.014 60kJkg Wet Bulb 20°C Enthalpy 50kJkg_ 0.012 0.010 0.008 40KJ/kg. 0.006 30kJkg 0.004 10°G 0.002 20kJ/kg_ 0.000 10KJ/kg O°C 50 40 OkJkg 30 20 10 Dry Bulb Temperature (°C) -10 0.95m kg Specific Humidity - Moisture Content (kg/kg) RH 0-5 f0.90m³lkg 70.85m³/kg 0.80m³/k 0.75m³/kg