Development of a System for Measuring Simultaneously Several Thermal Characteristics of Wet Porous Materials

本研究的目的是开发一种同时测量潮湿建筑材料的几种热特性的方法。本研究的结果如下：1。热湿耦合传递方程中的热湿特性不按顺序排列，因为这些特性的测量难度很大。我们建议采用简单的模型，将热湿耦合传递视为等效传热，即该模型的热特性取代了水分传递的影响。我们在简单模型中构造了测量特性的算法。我们制作了简单模型的热特性测量装置。该装置有风洞和人工照明设备。在风速和短波辐射的控制下，可以高效、快速地测量其热特性。在非稳态实验中测量了导热系数和比热等热特性。我们研究了热特性与含水率之间的关系。用简单模型和热湿耦合模型对外墙的热负荷进行了比较。这两种型号的差别很小。

The objective of this study is to develop a method for measuring simultaneously several thermal characteristics of wet building materials. The results of this study are as follows.1. The thermal and moisture characteristics in the coupled heat and moisture transfer equations are not arranged in order, because the characteristics involve great difficulties in measurement. We suggest the simple model in which the coupled heat and moisture transfer is treated as the equivalent heat transfer, that is to say the thermal characteristics of this model take over the effect of moisture transfer. We framed the argorithm for measuring of the characteristics in the simple model.2. We have made the measuring device of thermal characteristics of the simple model. This device has a wind tunnel and an artificial lighting equipment. We can measure the thermal characteristics efficiently and rapidly under the control of the wind velocity and the short wave-length radiation.3. Thermal characteristics, such as thermal conductivity and specific heat were measured in the unsteady state experiments. We investigated the relationships between thermal characteristics and percentage of water content.4. We compared the term heat load of an outside wall by the simple model with that by the coupled heat and moisture transfer model. The difference between the two models is very small.