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

湿多孔材料多个热特性同时测量系统的开发

基本信息

批准号：
01850136
负责人：
WATANABE Toshiyuki
金额：
$ 2.75万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850136/
关键词：
Porous material Thermal Characteristics Moisture Characteristics Coupled Heat and Moisture transfer Wind Tunnel Artificial Lighting Equipment Automatic Measuring System Term Heat Load Calculation 伝熱特性値同定

项目摘要

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.

这项研究的目的是开发一种同时测量湿建筑材料的几个热特性的方法。研究结果如下：1.研究结果如下。由于热湿耦合方程中的热湿特性在测量上存在较大的困难，使得热湿耦合方程中的热湿特性排列混乱。提出了将热湿耦合换热视为等效换热的简单模型，即该模型的热特性取代了湿传递的影响。在SIMPLE模型中，我们制定了测量特性的算法。我们制作了简易模型的热特性测量装置。这个装置有一个风洞和一个人工照明设备。在风速和短波辐射的控制下，可以高效、快速地测量热辐射特性。在非稳态实验中测量了导热系数和比热等热特性。研究了热物性与含水率之间的关系。比较了简化模型和热湿耦合模型对外墙热负荷的影响。这两种模式之间的差异非常小。