Study on the Pressurizing Measurement Method for the Airightness of the Building Envelope

建筑围护结构气密性加压测量方法研究

• 批准号: 13650656
• 负责人: NISHIOKA Toshiaki
• 金额: $ 2.11万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650656/
• 关键词: Method for Air-tightness; Amount of Cracks; Equation of the State; Impulse Pressurization; Balance of Mass; Equivalent Rate of Cracks; Alterative Pressure Method; Constant Pressure Method

The new method for measuring the air-tightness of the building envelopes were tested theoretically and experimentally. In the method alterative pressure particularly impulse one was applied.Pressure changes in a chamber were expressed with the theoretical equation which were derived from the equations of mass balance and of the state of the air in the chamber. This pressure change, differential equation includes the parameters of the air leakage, but can not be solved analytically for it's non-linearity. When there is no air source in the chamber, this differential equation can predicted the decay of pressure analytically. The procedure calculating the leakage parameters numerically by fitting measured pressure decay to the theoretical equation was provided.A test chamber and a monitorial device of airflow volume were made to conduct the measurement of the air leakage of cracks which shape and size were known. Both the constant pressure method and the alterative ones were tested. The p … More ressure in the chamber into which some amount of air is pushed is by a fan or by a high pressure cylinder is raised to the level several hundred Pascal higher than outside and suddenly the air is stopped to supply. The former is said the step-down method and the latter impulse one. The experimental results given from the constant pressure method show that the equivalent areas of the cracks agree very well with real ones over wide range in the crack size. That of the alterative ones indicates that the agreement between the equivalent areas and the real ones is very well for smaller cracks but not for lager ones. The reason for this is that the larger the crack is, the steeper the pressure drop is and the precise, numerical simulation of the rapid decay is very difficult.Impulsive pressurization method(IPM) by a high pressure cylinder is very convenient to measure the air leakage of the real building envelope without a supply fan and duct system. There needs no arrangement to apply, IPM is the excellent method for the airtight buildings, but not for loose ones. The experiments for smaller cracks were continued and the limits within which IPM is restricted to be apply were found. Less

对建筑围护结构气密性检测的新方法进行了理论和实验验证。该方法采用交变压力特别是脉冲压力，由质量平衡方程和气室气体状态方程推导出气室压力变化的理论方程。该压力变化微分方程包含了漏风量的参数，但由于其非线性，无法解析求解。当无气源时，该微分方程可以解析地预测压力的衰减。给出了将实测压力衰减拟合到理论方程中计算泄漏参数的方法，并制作了试验箱和风量监测装置，对已知形状和尺寸的裂纹进行了漏风量的测量。对恒压法和变压法进行了试验。的p ...更多信息 通过风扇或高压气缸将一定量的空气推入室内的室中的压力升高到比外部高几百帕斯卡的水平，并且突然停止供应空气。前者称为降压法，后者称为脉冲法。恒压法的实验结果表明，在较宽的裂纹尺寸范围内，裂纹的等效面积与真实的裂纹的等效面积吻合得很好。结果表明，对于较小的裂纹，等效面积与真实的面积吻合较好，而对于较大的裂纹，等效面积与真实的面积吻合不好。这是因为裂缝越大，压力降越陡，对快速衰减过程进行精确的数值模拟是非常困难的。高压气瓶脉冲增压法（IPM）是一种非常方便的测量真实的建筑围护结构漏风量的方法，不需要送风机和风管系统。IPM不需要布置，对密闭建筑物是一种很好的方法，但对松散建筑物则不适用。针对较小裂纹的实验继续进行，并发现了IPM应用的局限性。Less

项目成果

Unsteady pressurization method to measure the air-tightness of the building envelope

非定常加压法测量建筑围护结构气密性

• 发表时间: 2003
• 期刊: Proceedings of the 2nd International Building Physics Conference
• 作者: T.Nishioka

A New Technique for Measuring Air-tightness of the Building Envelope Using Pulse Pressurization

脉冲加压测量建筑围护结构气密性新技术

• 发表时间: 2000
• 期刊: Proceedings of the Ventilation 2000 2
• 作者: Toshiaki Nishioka

Dynamic Pressure Method For The Air-tightness Of The Building

建筑物气密性动压法

• 发表时间: 2004
• 期刊: Proceedings of the 7^<th> International Symposium on Building and Urban Environmental Engineering
• 作者: Q.Chen;T.Nishioka
• 通讯作者: T.Nishioka

変動圧法を用いた建物の気密性測定法に関する研究

脉动压力法建筑物气密性测量方法研究

• 发表时间: 2003
• 期刊: 日本建築学会大会学術講演梗概集 D-II 環境工学2
• 作者: 藤原清隆;西岡利晃他
• 通讯作者: 西岡利晃他

Unsteady pressurization method to measure the air-tightness of the building envelop.

非稳态加压法测量建筑围护结构的气密性。

• 发表时间: 2003
• 期刊: Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan D-2
• 作者: K.Fujiwara;T.Nishioka et al.
• 通讯作者: T.Nishioka et al.