=+3-57.

A research building requires 100 percent outdoor ventilation air 24 hours a day. This causes a high latent cooling load relative to the sensible load. The peak cooling load is 100,000 Btw/hr

(29.3 kW) with a SHF of 0.5. A coil configuration available has an apparatus dew point tem-

perature of 45 F (7 C) and can cool outdoor air from 85 F (29 C) db, 70 F (21 C) wb, to 51 F

(11 C) wb. The space is to be maintained at 75 F (24 C) db and 50% relative humidity (RH).

Assume constant air flow and standard sea-level pressure.

(a) Layout processes on Chart la for a system to accommodate the given requirements.

(b) What quantity of air must be supplied to handle the peak load?

(c) Determine other unknown quantities such as coil load, reheat, etc.