Volume l - Section IV - Experimental Work and Verification of CFD Methodology 
Page IV - 69 
4.1.3 
Room Condition 
4. 1.3.1 
Experimental Cases 
4. 1.3. 1.1 
Empty Room: Description of Apparatus 
The empty testing room, that measured 3.66m x 2.44m x 2.44m high (12’ x 8’ x 8’), was located 
within the larger air-conditioned UIUC room ventilation simulator (RVS). The room is shown in 
figure 4.45). The RVS is described in Wu et al., (1990). The placement of the room in the RVS 
allowed the supply air to the testing room to be precisely controlled. The RVS is capable of 
maintaining air temperature at any point between -25.0 to 40.0 °C (-13.0 to 104.0 °F) with an 
accuracy of ±1.5 °C (±2.7 °F), year around. In this study, room temperature in the RVS was 
maintained at 22.0±1.5 °C (71.6±2.7 °F). In this case, air was supplied by a TAD diffuser 
(Krueger 2-way total air diffuser), that was centered on the ceiling of the room. The diffuser, that 
measured 0.61m (24”) long (east-west wise) and 0.57m (22.5”) wide (north-south wise) was 
oriented to direct air towards the long axis of the room. The discharge surface of the diffuser was 
curved and the lowest point was 0.14m (5.5”) below the ceiling. The room air exhaust was a 
0.30m x 0.30m (12” x 12”) aluminum grille with a 20 percent open area and was located in one 
comer of the ceiling. The exhaust outlet was 0.2m (8”) away from both the west and north walls. 
The only other item of geometry in the room was the door, that measured 0.91m x 2.13m (3’ x 
7’), and was located centrally on the north wall. The door had a 6.4e-3m (V4”) crack on its 
bottom, that allowed pressurization of the room. 
Diffuser, ceiling center S 
Figure 4.45 Layout of the testing room and the zones used for data collection. Dashed lines 
show the borders of zones used in data collection. 
