Answer Happy

Given: Open-plan office space Floor area= 14m by 18m Floor to ceiling height =13m Desired indoor conditions: DBT=22C, RH 35% Outdoor conditions: DBT=33C, WBT=25C West wall same with the previous problem ■ West-facing wall, 12 ft high x 45 ft long [3.7 m x 13.7 m], constructed of 8 in. [203.2 mm] lightweight concrete block with aluminum siding on the outside, 3.5 in. [88.9 mm] of insulation, and ½ in. [12.7 mm] gypsum board on the inside. Space operation is from 8am-5pm, 25 people moderate working activity. ■ Eight clear, double-pane (1/4 in. [6.4 mm]) windows mounted in alumi frames. Each window is 4 ft wide x 5 ft high [1.2 m × 1.5 m]. ■Flat, 45 ft x 60 ft [13.7 m x 18.3 m] roof constructed of 4 in. [100 mm] concrete with 3.5 in. [90 mm] insulation and steel decking. Fluorescent lighting in space = 2 W/ft² [21.5 W/m²]. ■ Computers and office equipment in space = 0.5 W/ft² [5.4 W/m²], plus one coffee maker. Determine the following: 1. Space cooling load-sensible(S) and latent(L) 2. Assumed Supply Air Conditions -WBT and RH 3. Recalculated Supply Air Conditions -WBT and RH 4. Plots in the Psychrometric Chart for A(Return Air), B(Outdoor), C(Mixed Air) and D(Assumed and Recalculated Supply Air)