The following data refer to air conditioning of public hall: Outdoor…

Question

The following data refer to air conditioning of public hall:

Outdoor conditions = $40^\circ\text{C}$ DBT, $20^\circ\text{C}$ WBT;

Required comfort conditions = $20^\circ\text{C}$ DBT, 50% RH;

seating capacity of hall = 1000;

Amount of outdoor air supplied = $0.3\text{ m}^3\text{/min/person}$.

If the required condition is achieved first by adiabatic humidifying and then cooling, find:

i. The capacity of the cooling coil and surface temperature of the coil if the BPF of coil is 0.25

ii. Capacity of the humidifier and its efficiency.

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