At a steady rate, moist air is to be supplied to a classroom at a specified volumetric flow rate and temperature T. Air is removed from the classroom in a separate stream at a temperature of 27 degrees Celsius and 50% relative humidity. Moisture is added to the air in the room from the occupants at a rate of 4.5 kg/h. The moisture can be regarded as saturated vapor at 33 degrees celsius. Heat transfer into the occupied space from all sources is estimated to occur at a rate of 34,000 kj/h. The pressure remains uniform at one atm.
A. for a supply air volumetric flow rate of 40m^3 /min, determine the supply air temperature T in degrees celsius and the relative humidity.