100 m3 per minute outdoor air at 43.3°C DBT. and 37% relative humidity is mixed with 200 m3 per minute of air at 38.2°C d.b.t. and 24.5°C wet bulb temperature. The mixed air is dehumidified first by a cooling coil having by-pass factor of 0.32 and apparatus dew point of 15°C and then by a chemical dehumidifier. Air leaves the chemical dehumidifier at 30°C dry bulb temperature. Air is then passed over a cooling coil whose surface temperature is 15°C and by-pass factor 0.26. Calculate
(i) Capacity of two cooling coils in tons of refrigeration
(ii) Capacity of coil dehumidifier in kg / min.
(iii) Capacity of chemical dehumidifier in kg / min.
(iv) Total humidifying capacity of the system in kg / min.