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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被动通风系统，通过使用一种可以通过其表面通风的建筑构件(称为呼吸式建筑构件)，在自然应用中有效地运行。研究了非稳态条件下热、空气和水蒸气在呼吸式建筑构件中的运动情况，明确了热、空气和水蒸气的运动对构件的自然通风、隔热和水蒸气传输特性的影响。用统计方法对PET-A1片材穿孔透气建筑构件进行了稳态通风设计。在TRAIL中制造了一种具有自然通风、隔热、透气等基本性能的呼吸式建筑构件。实验是在一定的压力…下进行的更明确的区别，以表明必要的基本性质的要求在稳态条件下实际上是满足的。空气在构件体内和表面附近运动的可视化研究实验对非稳态条件下“呼吸建筑构件”体内和表面附近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、隔热和透气性能的非稳态参数。定性地证实了呼吸式建筑构件的自然通风特性，即使在压力波动10秒的条件下也是有效的。风压对呼吸建筑内热量和水蒸气运动的影响在人工气候试验室中建立了一个2m高的比例尺模型。利用该模型进行的实验是在被认为是最严格的条件下进行的，以导致呼吸建筑构件内部的冷凝。结果表明，风压波动时热回收效果较好，气流运动方向的改变降低了气流强烈外流引起的暂时性内凝结危险。较少