For a room to be air conditioned, the sensible heat gain is 12kW, the latent heat gain is 3.5kW and the inside design condition is 21°C DB and 50% RH. Determine the apparatus dew point (ADP) and the quantity of air to be circulated, if 75% recirculated air mixed with 25% outside air at 32°C DB and 27°C WB. The coil contact efficiency is 80% (BPF=0.2) Draw the cycle on a psychrometric chart.