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Modelling Of Hysteresis Influence On Mass Transfer In Building Materials

机译：滞后对建筑材料传质影响的建模

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The processes of mass transfer in the material influence not only the conditions within the material but also inside the connected air spaces. A new module for precise representation of mass transfer in materials in contact with the indoor air, called Humi-mur, was elaborated and validated in this work. It allows for the precise representation of sorption isotherm and vapour permeability dependence on relative humidity. Also the sorption curve hysteresis has been implemented. The new module was then applied to estimate the sensitivity of the results to uncertainty in measured material properties and the impact of hysteresis effect. Reasonable estimation of experimental uncertainty resulted in the deviation of approximately 6% in the calculated results. Hysteresis quite strongly influences the dynamic behaviour of materials. Concerning hysteresis in the sorption isotherm, we showed that the average of the adsorption and desorption equations is a reasonable approximation of mean behaviour for coarse calculation. In case when precise results of the relative humidity (absolute humidity) are needed, the hysteresis effect should be taken into account.
机译：材料中的传质过程不仅会影响材料内部的状况，还会影响所连接的空气空间内部的状况。在这项工作中，精心设计并验证了一种新的模块，用于精确表示与室内空气接触的物质中的传质。它可以精确表示吸附等温线和蒸汽渗透率对相对湿度的依赖性。吸附曲线的磁滞也已实现。然后，将新模块应用于估算结果对所测材料性能不确定性和磁滞效应影响的敏感性。合理估算实验不确定性会导致计算结果偏差约6％。磁滞非常强烈地影响材料的动态行为。关于吸附等温线的滞后现象，我们表明吸附和解吸方程的平均值是对粗略计算的平均行为的合理近似。如果需要精确的相对湿度（绝对湿度）结果，则应考虑磁滞效应。

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