在过去几年中，已经开发了几种不同的计算机模型，可以预测不同复杂程度的建筑墙体的湿热行为。结合建筑围护结构和室内气候，开发了一种新的湿热模型。该模型能够预测热量和水分的联合传递，包括液体和蒸汽的流动以及多孔介质中水分的相变，并且共水分可能会对建筑材料的耐久性产生一些不必要的影响，例如腐烂、霉菌生长、腐蚀和砌体劣化。 某些材料中的水分和霉菌生长可能会导致排放增加，并成为健康风险。其中一些影响仅在特定温度和水分含量下才会发生，因此正确耦合能量和水分传输方程非常重要。蒸汽和二氧化碳通过建筑墙体扩散对室内气候和墙体含水量的影响是作为角落卧室通风率的函数呈现的。研究了两种轻型木框架墙体结构，一种带有蒸汽屏障，另一种没有蒸汽屏障（6）- 密尔-佩）。在暴露于真实环境条件的棚屋中进行的小规模实验验证了该模型。然后，使用仿真模型将这些结果扩展到全尺寸房屋。结果清楚地表明了在低通风率下扩散过程对室内气候的重要性。在高通风率下，这种影响变得无关紧要，房间内的室内气候彼此接近，正如预期的那样。单元:SICitation:研讨会，ASHRAE交易，1998年，第104卷，第2部分，多伦多

During the past few years several different computer models have been developed that can predict the hygrothermal behavior of building walls with different degrees of complexity. A new hygrothermal model has been developed that combines the building envelope parts and the indoor climate. The model is capable of predicting the combined transfer of heat and moisture, including liquid and vapor flow and phase changes of moisture in the porous media and CO Moisture can have several unwanted effects on the durability of building materials, such as rotting, mold growth, corrosion, and deterioration of masonry. Moisture and mold growth in some materials may result in increased emissions and become a health risk. Some of these effects occur only at certain temperatures and moisture contents, which makes it important that the coupling of the energy and moisture transfer equations be done correctly.The effect of vapor and CO2diffusion through building walls on the interior climate and wall moisture contents are presented as functions of ventilation rates for a corner bedroom. Two lightweight wood frame wall structures are investigated, one with and one without a vapor barrier (6-mil PE). The model is verified against small-scale experiments in huts exposed to real environmental conditions. These results are then expanded for a full-scale house using the simulation model.Results clearly show the importance of diffusion processes on the indoor climate at low ventilation rates. At high ventilation rates, the effect becomes insignificant and the indoor climate in the rooms approach each other, as would be expected.Units: SI