ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-469-4
ISBN Online: 978-1-56700-470-0
Second Thermal and Fluids Engineering Conference
HEAT MASS TRANSFER ANALYSIS ON THE EFFECTS OF FOUNTAINS TO THE THERMAL COMFORT OF A SEMI-OPEN SQUARE
Аннотация
Semi-open spaces alongside large commercial buildings are becoming popular features; often aim to provide
semi-indoor conditions for leisure activities. Semi-open spaces are also integrated with the natural thermal flow
elements of the environment. The effects of the ambient conditions and the solar radiation were the factors
considered in this study to evaluate the human thermal comfort. The semi-open square of the Kaohsiung new
train station under construction was treated as a micro- environment. Human thermal adaptation to shaded spaces
was also considered. Natural ambient wind was adapted in the thermal analysis. This study has investigated and
compared the influence of fountains on the thermal comfort of the semi-open space. The indices of standard
effective temperature and mean thermal sensation vote (MTSV) were used to evaluate the thermal comfort.
Droplet trajectory and velocity distribution was simulated with discrete phase model (DPM). Heat and mass
transfer was calculated in couple with the surrounding flow field. Droplets distribution of the fountains was
analyzed to quantify the cooling effect of fountains for the micro-environment. The simulation results show that
at most unfavorable condition MTSV can decrease to 0.64 due to cooling of fountains. MTSV would reach the
comfort range when the ambient conditions were more favorable. In conclusion the heat mass transfer
characteristic of fountains were studied and found to be a mean of effective cooling for semi-open spaces.