ISSN Online: 2377-424X
ISBN Print: 1-56032-797-9
International Heat Transfer Conference 11
Thermal Environmental Characteristics in Ondol Heated Space Considering Floor Heat Conduction
Résumé
Thermal environmental characteristics in an ondol
heated space are investigated numerically considering
heat conduction through a floor slab as well as
radiation heat exchanges between wall surfaces. The
floor is heated by embedded hot water coils, and one
of the vertical walls simulates a cold window. Four
different coil patterns are utilized to investigate the
effect of the coil patterns on indoor thermal comfort
conditions. Turbulent indoor airflows are calculated
with the low Reynolds k−ε turbulence model and SIMPLER algorithm based on the finite volume
method. Radiative heat transfer is analyzed using the
net radiation method with shape factors obtained
using the crossed string method. Thermal comfort
index of Predicted Mean Vote (PMV) is obtained
from the calculated distributions of air velocity,
temperature, and mean radiant temperature. It is
found that the case of relatively dense coils near the
cold wall provides a slightly warmer sensation on the
average compared to the case of uniform coil pitch,
but results in a larger variation of floor surface
temperature and more heat loss by conduction.