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 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.

                                                  

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