建筑构件内热湿耦合过程分析中的传递函数解析法

建立了建筑构件内耦合的传热传湿动态数学模型，鉴于材料吸湿在传热传湿相互作用中的重要性，在能量方程中考虑湿度梯度作为热源或热汇，在质量方程中把温度梯度作为湿源或湿汇。首次提出用传递函数分析方法研究建筑构件内的热湿耦合过程，并以玻璃纤维板为例应用该方法进行了热湿耦合过程的分析计算，得到了板内温度和含湿量的动态分布特性。计算结果和实测值吻合较好，表明本建立的数学模型和求解方法合理可信。

An Analytical Method Utilizing Transfer Function for Coupled Heat and Moisture Transfer Process in Building Elements

The dynamic mathematical equations were addressed for coupled heat and moisture transfer in building elements in this paper. The humidity gradient is considered as the heat source or heat sink in the energy equation, and the temperature gradient is considered as the moisture source or moisture sink in the mass equation, due to the importance of the material moisture absorption within the interaction between heat and moisture transfer. An analytical method by means of the transfer function was proposed for the first time to study the processes of coupled heat and moisture transfer in building elements. The calculations for coupled heat and moisture transfer in the fiberglass slab were conducted to obtain the transient distributions of temperature and moisture content using the mentioned method. The results agree with the measured data, and it shows that the mathematical equations and the solving method presented are convincing.