多层墙体瞬时热负荷计算新模型

提出了一种计算通过建筑多层墙体的瞬时热负荷的新模型。在一定的频率范围内计算出墙体传热的理论频率响应，从理论频率响应得到墙体横向传热及内表面吸热的多项式s传递函数，并由拉氏逆变换和离散得到简单的递推公式。比较与验证的结果表明这种模型计算速度快、精度高、灵活性好、数值稳定。

A new model for calculating transient thermal load through multilayer walls

A novel model is developed for calculating transient thermal load through a building multilayer construction. The theoretical frequency responses of cross and internal heat conduction are calculated within the frequency range concerned. Two polynomial s-transfer functions are then estimated from the frequency responses. Finally, some simple recursive formulae are obtained simply by inverse Laplace transform and discretizing. The validations and comparisons show that this model provides fast computation speed, high accuracy, good flexibility to variable time steps and has no numerical unstability.