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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.

本研究的目的是开发一种同时测量湿建筑材料的多种热特性的方法。本研究的结果如下： 1．热湿耦合传递方程中的热湿特性没有按顺序排列，因为这些特性测量起来有很大困难。我们建议采用简单模型，将热湿耦合传递视为等效传热，也就是说该模型的热特性取代了水分传递的影响。我们构建了简单模型中特征测量的算法。 2．我们制作了简单模型的热特性测量装置。该装置具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、快速地测量热特性。 3．在非稳态实验中测量了热特性，例如导热率和比热。研究了热特性与含水率之间的关系。 4．我们将简单模型的外墙热负荷与热湿传递耦合模型的外墙热负荷进行了比较。两种型号之间的差异非常小。