ISSN Online: 2688-7231
ISBN Online: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Estimation of Ground Temperature for Installation of Earth Air Tunnel for Hot and Humid Climatic Conditions
要約
In the present work, an attempt has been made to find the
temperature variation inside the ground for various surface
conditions by considering the variation of soil thermal
properties with depth. Estimating temperature variation
within the subsurface depends on two major meteorological
parameters, i.e., atmospheric air temperature and solar
radiation. Soil temperature shows spatial and temporal
variation due to differences in meteorological parameters
with time and change of thermal diffusivity rate with depth.
The depth of penetration of heat energy and stabilization of
temperature depends on soil thermal properties. The factors
which affect subsurface temperature variation are subsurface
thermal properties, soil type, moisture content, density,
etc. The mineralogical constituent of soil also affects heat
transfer within the subsurface. A geographical factor is a
latitude and meteorological factor such as temperature of
air, speed of the wind, precipitation, the intensity of solar
radiation, soil temperature, and vegetation responsible for
heat transfer. For the present case, two surface conditions
are studied, and the depth at which the temperature becomes
constant annually is found out. An analytical solution has
been obtained for the temperature at various depths, which
requires solving the Fourier series.