The existing heat transfer calculation method of underground building envelope can not be well combined with actual engineering design.In order to optimize the heat transfer calculation method of underground building envelope,a three-dimensional unsteady heat transfer calculation method of underground building envelope is proposed.Jinan is selected as a typical city in cold area,and the finite volume method is used to solve it in MATLAB software.The concept of nominal heat transfer coefficient of the outer wall of underground building is put forward,and the heat transfer of three different types of underground building envelope under outdoor design temperature conditions is obtained through a large number of examples.Furthermore,the formula of heat transfer coefficient suitable for engineering design and calculation in cold areas is fitted.The results show that the mean square error r2 of each fitting formula is greater than 0.90.The fitting effect of the nominal heat transfer coefficient obtained from the calculation formula is good,which can better combine the heat transfer theory of shallow underground buildings with engineering practice.
关键词
地下建筑/有限容积法/三维非稳态导热/传热系数
Key words
underground building/finite volume method/three-dimensional unsteady heat conduction/heat transfer coefficient
维普
万方数据