Abstract:
The objective of this study is to investigate the behavior of
thermal walls as elements in low energy consumption buildings
and residences. The problem is formulated based on one
dimensional model and solved numerically by finite difference
technique. Numerical tests were realized to optimize the
numerical grid. Two wall arrangements were investigated;
simple wall with incorporation of external surface colour, bio
mass additives to construction slabs, and double wall with and
without spacing filled with stagnant air. The influence of these
variations on the maximum internal ambient temperature and
the corresponding time lag with respect to the maximum
external surface temperature were calculated for each case.
Results indicated that increasing wall thickness reduces the
internal peak temperature and delays its occurrence. Light
colour paints and wall planted vegetation have similar effects as
increasing wall thickness. Low thermal conductivity material
and use of surface finishing mortar mixed with dry biomass
helps reducing the solar heat gain, internal ambient temperature
and increasing the time lag. The spacing between the walls can
reduce significantly the heat transferred to internal living space
and increases both the thermal comfort and the temperature
time lag.
Description:
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .
