Determine the conditions at outlet of cooling coil, RSH. RLH, the cooling load of coil and the condensate rate

Question

         In an air-conditioned space, 50 kga/s of fresh air at 45° C dry-bulb temperature and 30% relative humidity is introduced. The room air at 25°C dry-bulb temperature and 50% relative humidity is recirculated at 450 kga/s. The mixed air flows over a cooling coil which has apparatus dew point of 12⁰ C and bypass factor of 0.15. Determine the conditions at outlet of cooling coil, RSH. RLH, the cooling load of coil and the condensate rate. The saturation pressure of water at required temperatures are

         t0C         P_s (bar)

         12        0.014016

         25         0.03166

         45         0.09584

         h = 1.005 t + w (2500 + 1.88 t) kJ/kga

         t is in °C and kga refers to kg of dry air.