两种建筑围护结构动态热湿耦合 传递模型对比与验证

对以相对湿度为湿驱动势的两种热湿耦合传递模型（Künzel模型和Liu & Chen模型）进行了对比与全面验证，包括理论验证、模型间验证和实验验证. 使用Fortran程序和COMSOL软件同时进行模拟，模拟结果分别与解析解、其他模型模拟解和单/双侧受控边界条件下的实验数据进行对比，模拟结果与对比值之间有良好的一致性. 将两模型模拟结果进行对比后发现，在吸湿区内低相对湿度段，两模型差异不大；而在吸湿区末段（相对湿度逐渐增大至接近95%），Künzel模型不再能够准确模拟湿分布. 此研究在吸湿范围内充分验证了两个模型，并为将来的热湿耦合模型验证提供参考.

Comparisons and Validation of Two Dynamic Models for Coupled Heat and Moisture Transfer in Building Envelopes

A comparison and comprehensive verification, including theoretical verification, inter-model verification and experimental verification, was performed on two models, the Künzel model and the Liu & Chen model for the hygrothermal simulation of porous building envelopes, which are driven by relative humidity. The simulations were also carried out by two computation tools, self-programmed Fortran code and COMSOL Multiphysics for the two models. The simulation results were compared with analytical solutions, simulation solutions of other models and experimental data under single/double-sided controlled boundary conditions. The verification showed that the simulation results of the two models agreed well with the comparison values. Through the comparison between the simulation results of the two models, it was found that the two models have slight difference in the low relative humidity section in the hygroscopic range; while in the end of the hygroscopic range (relative humidity gradually increases to nearly 95%), the Künzel model was no longer able to accurately simulate the distributions of moisture. The investigations in this study demonstrate that the two models are fully validated within the hygroscopic range and provide references for the verification of future hygrothermal models.