A laboratory space has a heat gain of 3 tons with a sensible heatfactor of 0.7. The indoor design conditions are 78 F at 40% RH. Theoutdoor air design conditions are 95 F at 50% RH. The coolingequipment has a fixed air flow rate of 350 cfm/ton of cooling. Thecooling system consists of a mixing box (to mix outdoor and returnair), a filter, and a cooling coil. At the design condition thesystem mixes 25% outdoor air with the return air.
a. Draw a psychrometric diagram labeling the system states
b. Determine the required volume rate of supply air
c. Determine the number of parallel filters required to provide amaximum pressure drop of 0.125 in wg using 24x24x8 M-200 media