=+3-39.

An evaporative cooling system is to be used to condition a large warehouse located in Denver, Colo ., (elevation = 5000 ft or 1500 m). The space is to be maintained at 80 F (27 C) and 50 percent relative humidity by a 100 percent outdoor air system. Outdoor design conditions are 90 F (32 C) db and 59 F (15 C) wb. The cooling load is estimated to be 110 tons (387 kW)

with a sensible heat factor of 0.8. The supply air fan is located just downstream of the spray chamber and is estimated to require a power input of 30 hp (22.4 kW). Determine the volume flow rate of air to the space, and sketch the processes on a skeleton psychrometric chart in (a)

English units and

(b) SI units.