高寒地区平屋顶保温层厚度反演

Thickness Inversion of Flat Roof Heat Preservation Layer in Cold Area

建筑节能的发展和新型保温材料的使用中,合理的设计墙体及屋顶保温层的厚度,日益成为目前建筑节能的重要问题.将高寒地区平屋顶保温层厚度设计问题抽象为热传导方程几何边界反问题,通过不断地数值模拟,分析比较结果,得出保温层(文中为加气混凝土层)厚度为250 mm^300 mm时,屋顶内表面的温度变化值落在16℃~24℃之间,此时的保温层厚度为所求得最佳保温层厚度.

With the development of energy-saving construction and the wide use of new heat preservation materials, the design for proper wall thickness and roof heat preservation layer is becoming an increasingly important issue in energy-saving construction. In this paper, the design for proper thickness of fiat roof heat preservation layer in cold area is abstracted into geometric boundary inversion of heat conduction equation. Analysis and comparison of a numerical simulation indicate that when the heat preservation layer（ aerated concrete layer ） is 250- 300 mm thick, the surface temperature on the roof maintains from 16℃ to 24℃. Therefore, the best thickness for such heat preservation laver is 250- 300 mm.