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(Solved):   QUESTION 3 Air at a temperature of 30C dry bulb and 75% relative humidity enters a cooli ...



QUESTION 3
Air at a temperature of 30°C dry bulb and 75% relative humidity enters a cooling coil
at the rate of 5 m³/s. The c

 

QUESTION 3 Air at a temperature of 30°C dry bulb and 75% relative humidity enters a cooling coil at the rate of 5 m³/s. The coil dew point temperature is 14°C and the by-pass factor of the coil is 0.12. 3.1 Determine, (a) the temperature of air leaving the coil (b) the capacity of the cooling coil in kW (c) the amount of water vapour removed per min, and (d) the sensible heat factor of the process. 3.2 Name and justify the air type of air conditioning process. (3) (10) (3) (3) (4)


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1. The contact factor is defined as Where t1= coil coil inlet dry bulb temperature = 300C td= cooling coil dew point temperature = 140C t2= cooling coil outlet temperature Hence 0.9=(30-t2
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