A Numerical Simulation of Transient Heat Flow in Double Layer Wall Sticking Lining Envelope of Shallow Earth Sheltered Buildings

As the earth sheltered buildings are constructed worldwide then the heat transfer characters between the indoor air and atmosphere have been an import problem to study. The physical and mathematical model for the double layer wall sticking lining envelope of shallow-buried underground engineering is described and built in this paper, separately. The boundary conditions on the surface of the soils include both the convection and radiation heat transfer progress. A general FEM (Finite Element Method) software is adopted to analyze the heat flux and temperature variations on the different surfaces of the building materials, ceiling, wall, and the floor of the earth sheltered building. The results showed that the different building materials in the double layer wall sticking lining envelope of shallow earth sheltered building affects the heat transfer a little. So the double layer type may be simplified into the single one if the accuracy is allowable.