周期双外扰作用下建筑墙体非稳态传热过程研究

Building envelope is generally affected by the external disturbance of outdoor air temperature and solar radiation. In the heat load simplified calculation, outdoor air temperature was often treated as the heating outdoor design temperature, and the solar radiation often considered by correction factor for orientation or as security item to be ignored. However, for the passive solar house, heat load have dynamic characteristics, the outdoor air temperature and solar radiation are also designed for a typical day hourly data change. Based on analysis above, this paper established building wall unsteady heat transfer equations, using the mathematical method solve the unsteady heat transfer equations under the boundary conditions of outdoor temperature and solar radiation disturbance, and the analytical solution was obtained. Finally, the convenient and practical features of the analysis solution were shown by the calculating example.