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

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呼吸的建筑构件（它被称为“呼吸建筑构件”），在自然应用中有效地运行。本文研究了非稳态条件下热、空气和水蒸气在呼吸建筑构件中的运动规律，阐明了热、空气和水蒸气的运动对呼吸建筑构件的自然通风、隔热和透汽性能的影响. PET-A1多孔板呼吸式建筑构件在稳态条件下的隔热性能和空气渗透率采用统计方法进行通风设计。试制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。实验在一定压力下进行， ...更多信息 一定的差异，以明确必要的基本性质的要求实际上是满足在稳态条件.用可视化实验研究构件体内及表面附近的空气运动定性地研究了非稳态条件下“呼吸建筑构件”体内及表面附近的空气运动。利用激光进行可视化实验，提取影响构件自然通风、隔热和透汽性能的非稳态参数。定性地证实了呼吸建筑构件的自然通风性能即使在10秒的压力波动条件下也是有效的.风压对呼吸建筑构件热、汽运动的影响在人工气候试验室中建造了一个高2 m的缩尺模型。使用这种模型的实验是在被认为最严格导致呼吸建筑构件内部冷凝的条件下进行的。定量地表明，风压波动时热回收效果好，气流运动方向的改变降低了由于气流强烈外流而引起的内部临时凝结的危险性。少

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