الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Proper distribution of conditioned air plays an important role in both the comfort of the occupants and the air quality of ventilated or air conditioned spaces. Conditioned air should be supplied in proper quantities and temperatures to meet various thermal requirements of occupied spaces. Large air velocities, temperature gradients, and lurbulence intensities should be avoided since these factors, either individually or combined, may cause draft which is undesirable for occupants. Airflow pattern and distributions of velocity, temperature and turbulence intensity are the primary factors that affect room air movement and comfort of occupants in the occupied zone.
The main objectives of this study are: (1) To present airflow patterns, air velocity, air temperature, turbulence intensity, and kinetic energy of turbulence distributions. (2) To investigate the velocity and temperature characteristics of air jet expansion. (3) To evaluate Air Distribution Performance Index (ADPI) based on the actual centerline data and !o integrate the effect of turbulence into ADPI. (4) To evaluate the room air motion with an obstruction present inside the room.
The room air movement data (air velocity, turbulence, temperature, etc.) were collected in a large test room, 7.3 x 4.9 x 2.7 m (24 x 16 x 9 ft), with a high sidewall grille diffuser (HSG). The airflow characteristics along the centerline of the room for twenty seven test cases under both isothermal and cooling flow conditions were investigated. The cases were classified into four groups: one group was for the isothermal cases and three groups were for the cooling cases at three different heat load levels (31.5, 63.0 and 94.5 W/m2), with different airflow rates (357, 425, 493, 595, 731, 867, and 952 m3/hr). A special test group was performed so that a vertical obstruction was present inside the room.