12

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a)

b)

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With the help of schematic diagram describe the working of year round air
conditioning system

Differentiate between all air and air water system

A summer AC is operating using 100% ventilation are without any
recirculation. The outside air is at 35 °C DBT and 45% RH. The conditioned
room is maintained at 25 °C DBT and 45% RH. The flow rate of air is 0.95
123/5 and The SHR of the room is 0.72. The air leaving the cooling coil is 90%
saturated and rest 10% is bypassed. Determine 1) the apparatus dew point and
the temperature of the air leaving the coil, 2) How much cooling in kW is the
unit doing? and 3) How much moisture in kg/kg of dry air is condensed out of
the incoming air per hour?

Describe the important factors to be considered while designing an air
conditioning system for 1) cinema theatres and 2) hospitals with schematic

representations

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