Airflow and air temperature distribution in the occupied region of an underfloor ventilation system

Effectiveness of CFD simulation for the performance prediction of phase change building boards in the thermal environment control of indoor spaces

“…Thus both stratification and a slight overturning near the walls are observed in this simulation. provides better thermal comfort [32]. The determination of the velocity, temperature and turbulence fields from the CFD results may further improve the evaluation of local thermal comfort [33], which is otherwise not available for zonal models.…”

Sensation of draft at uncovered ankles for women exposed to displacement ventilation and underfloor air distribution systems

“…However, since the subjects were wearing trousers, socks and shoes, the air temperature at the ankle level had to be lower and the air velocity higher than at the neck level to obtain the same reduction in skin temperature. Nowadays, owing to the widespread use of UFAD systems and also to shifts in common dress codes that allow for uncovered ankles in offices, a new need has emerged for an assessment of draft risk at the ankles [25][26][27][28].…”

Temperature Stratification of Underfloor and Ceiling Based Air Heating Distribution System in an Experimental Room

“…With UFAD systems, the conditioned air is supplied close to occupants and therefore it is apparent that it would have a strong effect on occupants' thermal sensation. In spaces served by UFAD systems, the "cold feet" complaint due to the low supply air temperature and relatively high velocity of the air movement has often been reported by occupants as uncomfortable thermal sensation [12][13][14][15]. Supplying the conditioned air in awarmer range is usually recommended as a mean to avoid this uncomfortable sensation [11].…”