中文摘要：

建立了调湿材料吸放湿过程的热湿传递耦合方程,在周期性热湿作用边界条件下对耦合方程进行变换分析,得出其理论解.研究了封闭空间内调湿材料在周期性热湿作用下的吸放湿特性,结果表明空气含湿量波动振幅与温度波动振幅之比值为一复常数,其模值能表示材料吸放湿能力大小,初相位能表示材料吸放湿应答性快慢,从而引出了测试调湿材料吸放湿性能的方法——封闭箱热作用法.利用该方法测试了硅胶板、混凝土板和夯土板的吸放湿性能,验证了该方法的有效性,结果显示硅胶板的吸放湿性能最好,混凝土板最差;得出了调湿材料在封闭箱中的吸放湿规律,即空气温度升高时材料放湿,空气温度下降时材料吸湿,可根据空气绝对湿度曲线判断材料吸放湿性能的好坏.

英文摘要：

Establishing the coupled equations of heat and moisture transfer in the materials to describe the moisture adsorption/desorption processes, obtains the analytical solutions of temperature and humidity ratio in the materials by transforming the equations with the steady periodic convective boundary conditions. The analytical solutions are utilized to clarify the moisture adsorption/desorption characteristics of the humidity control plate that is free placed in a closed space, and it shows that the air humidity ratio amplitude is in direct proportion to the air temperature amplitude, the proportion coefficient can be used as a criterion to indicate the adsorption/desorption ability of a material, and the lag time between the humidity ratio and the temperature can be used as a criterion to indicate the adsorption/desorption response of the material. Thereby, a test method called the closed box and thermal effect method is introduced to investigate the moisture adsorption/desorption performance. The validity of this method is experimentally checked by testing the performance of three kind of materials including silica gel plate, concrete slab and puddle plate. The results show that the performance of the silica gel plate is the best and that of the concrete slab is the poorest, and that the moisture is desorbed from materials when the closed box is heated and absorbed from air when the closed box is cooled, and that the tested curve of absolute humidity can show the performance of the material.