Answer Happy

Question 2 (30 marks) A 35 000 m³ volume building for a chemical manufacturing facility requires three air changes per hour. The air in the building is to be maintained at a temperature of 22°C and relative humidity of 65 per cent. The external air is saturated and at a temperature of 6 °C. Determine (a) Volume of saturated air at 6 °C required to be pumped into the building per hour. (b) mass of water in kg/h to be added to the air to maintain the required humidity at 22°C (assume water is supplied at 6°C) (c) Heat transfer required by the dry air in MJ/h to produce the required temperature of 22°C. (d) Heat transfer required by the combined water vapor in the air and the extra water needed in MJ/h. Take C, for superheated steam as 2.0934 kJ/kg K.