An Experimental Study on the Indoor Environment Using UnderFloor Air Distribution System

The purpose of this research is to study the characteristics of indoor thermal environment on the sixth floor of Taiwan Building Technology Center (T.B.T.C.) building. Experimental measurements were conducted in a test chamber with the UnderFloor Air Distribution (UFAD) system. This research investigates supply air flow velocity and flow rate, and the vertical temperature distribution in the indoor environment. The experimental results of supply air flow velocity and flow rate show that the supply air flow rate for a single supply vent is 0.022 m3/s for the Q1 option, 0.024 m3/s for the Q2 option and 0.033 m3/s for the Q3 option. The results also show that the indoor vertical temperature distribution is influenced by the distance between the measuring location and the supply vent position. When the measuring location is close to the supply vent, the vertical temperature profile is influenced by the supply conditioned airflow. When the distance from the supply vent is larger than 150 cm, the vertical temperature distribution becomes quite consistent. The vertical temperature profile is not influenced significantly by the return vent location. The supply air flow rate can change the vertical temperature distribution.