9.12 A zone of a commercial building in Miami is maintained at 24 C and 50% RH. It is occupied by 12 people from 8 am to 5 pm, each with

a computer (100 W), 4 printers (200 W) and a copier (1000 W). The required ventilation flow rate is 7.5 l/s per person. The exterior walls are Wall type 31 with 100 m² of west-facing wall area. The windows are double pane reflective coated windows with 20 m² of area. The design day dry-bulb and wet-bulb temperatures and solar radiation are given in the table below. Determine and plot the components of the total heat gain for the zone. Determine the maximum heat gain, the SHR at this time, and the time it occurs. Draw some conclusions from your analysis. Table 3 shows the hourly ambient dry-bulb and wet- bulb temperature and solar radiation and Table 4 shows the material properties, thermal resistance, UA-value, and capacitance for each wall layer. Please complete Table 4 in the by inputting the correct thermal resistance, UA-value and capacitance of the gray boxes. Table 3: Hour ambient data Time T₁ 1 2 3 4 5 6 7 8 9 10 11 12 F01 surface M15 concrete 104 insulation G01 Gypsum board 27 26 26 26 26 26 26 27 28 29 30 31 L E k Tub 24 24 24 23 23 23 24 24 24 24 25 25 W/m- K rho G₁ W/m² 0 Kg/m³ 0 0 0 0 12 83 139 184 219 243 262 23 24 Table 4: Wall Data Time kJ/kg- K 13 14 15 16 17 18 19 20 21 22 Cp R (L/K) m². K/W 0.044 0.17 1.95 2242.58 0.92 0.07 0.05 19.22 0.96 0.01 0.16 800.92 1.09 T₂ (C) 32 32 32 32 32 31 30 29 29 28 27 27 R m². K/W U (1/R) W/m². K Tub 25 25 25 25 25 25 25 24 24 24 24 24 Gt W/m² 406 606 758 834 796 562 6 0 0 0 0 0 C (rho x Cp x L) kJ/m²-k N/A