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DEVELOPMENT OF "BREATHING ARCHITECTURAL MEMBER" AND APPLICATION TO PASSIVE VENTILATION SYSTEM

“会呼吸的建筑构件”的研制及其在被动通风系统中的应用

基本信息

批准号：
09650645
负责人：
HOYANO Akira
金额：
$ 2.3万
依托单位：
TOKYO INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

The purpose of this research is to develop a passive ventilation system which runs effectively in natural application, by the usage of an architectural member which can ventilate through its surfaces (It is called "breathing architectural member".). The movement of heat, air and vapor across the breathing architectural member in the unsteady-state condition was studied to make it clear that the movement of heat, air and vapor has influence on the properties of natural ventilation, thermal insulation and vapor transmission of the member.The results of this research are summarized in details as follow.1. THERMAL INSULATION CAPACITY AND AIR INFILTRATION OF A BREATHING ARCHITECTURAL MEMBER MADE OF PERFORATE PET-A1 SHEETS IN STEADY-STATE CONDITIONVentilation design was done by statistical ways. A breathing architectural member which has fundamental properties of natural ventilation, thermal insulation and vapor transmission was manufactured in trail. Experiment was done under a certain pres … More sure difference to make it clear that the demand of necessary fundamental properties was actually meet in steady-state condition.2. STUDY OF AIR MOVEMENT IN THE BODY OF THE MEMBER AND NEAR ITS SURFACE BY VISUALIZATION EXPERIMENTThe air movement in the body of "breathing architectural member" and near its surfaces in unsteady- state condition was qualitatively studied. The visualization experiment was done by the utility of laser light in order to extract unsteady parameters which influenced the properties of natural ventilation, thermal insulation and vapor transmission of the member. The natural ventilation property of breathing architectural member was qualitatively confirmed to be effective even under the condition of pressure fluctuating in a ten-seconds period.3. THE INFLUENCE OF WIND PRESSURE ON THE MOVEMENT OF HEAT AND VAPOR ACROSS BREATHING ARCHITECTURAL MEMBERA scale mock-up model which was 2m in height was constructed in an artificial climate test room. The experiment by use of such model was done under the condition considered to be most strictly to result in condensing inside of breathing architectural member. It was quantitatively shown that the effect of heat recovery was proved to be high while wind pressure was fluctuating, and the danger of temporary internal condensation caused by intensive outflow of air was decreased by the changes of direction of air-movement. Less

本研究的目的是开发一种在自然应用中有效运行的被动通风系统，通过使用可以通过其表面通风的建筑构件（称为“呼吸建筑构件”）。研究了非稳态工况下热、空气和蒸汽在呼吸建筑构件中的运动，阐明了热、空气和蒸汽的运动对构件的自然通风、隔热和传汽性能的影响。本研究的结果详细总结如下：1。采用统计方法对PET-A1多孔板材呼吸式建筑构件在稳态通风条件下的保温性能和空气入渗进行了研究。试验制造了一种具有自然通风、隔热、透汽等基本性能的呼吸式建筑构件。实验是在一定压力下进行的，更确切地说明了在稳态条件下实际上可以满足必要的基本性质的要求。采用可视化实验研究构件体内及近表面的空气运动对非定常状态下“呼吸式建筑构件”体内及近表面的空气运动进行了定性研究。利用激光进行可视化实验，提取影响构件自然通风、保温和透气性的非定常参数。定性地证实了呼吸式建筑构件在10秒压力波动条件下的自然通风性能是有效的。研究了风压对建筑构件间热蒸汽运动的影响。在人工气候试验室中搭建了高2米的比例模型。利用该模型进行的实验是在被认为最严格导致呼吸构件内部凝结的条件下进行的。定量地表明，当风压波动时，热回收效果较好，空气运动方向的改变降低了空气密集流出引起的暂时内凝的危险。少