Airflow Rates between Multiple Rooms by Using Multiple Gas Technique

使用多种气体技术的多个房间之间的气流速率

• 批准号: 10450208
• 负责人: ENAI Masamichi
• 金额: $ 5.25万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450208/
• 关键词: interzonal airflow; multiple tracer gas technique; passive ventilation; airtight house; distribution of gas concentration; 瞬時一様拡散; ガス供給法; 解析法; ガス濃度; 算定時刻

Air distribution in airtight houses should be carefully designed in order to prevent future problems with air quality. It is important to understand airflow paths and interzonal airflow rates in such houses. One method for calculating ventilation rates within a house is the multiple tracer gas technique, the accuracy by using it do not have always evaluated by the other method in a strict sense. Usually, most houses do not have a device for measuring airflow rates. Accordingly, the multiple tracer gas technique can be used for measuring the airflow rates in such houses.In this study, the interzonal airflow rates in actual-sized test houses or in model spaces were measured by using the multiple tracer gas technique. The results obtained from the multiple tracer gas technique were compared with those obtained from other method such as a differential pressure method in order to evaluate the accuracy of the tracer gas technique.The multiple tracer gas technique is evaluated by using actual-sized test houses or model spaces with known airflow rates. The experimental results can be summarized as follows:(1) The values obtained by tracer gas technique have errors of 20 %, to 30 %. This degree of accuracy is similar to those shown in the previous reports.(2) When the degree of air-tightness was low (e.g., 5 cmィイD12ィエD1/mィイD12ィエD1), the errors became larger. As a large number of cold drafts produce an extreme distribution of gas concentrations, a fan should be used to diffuse them if the airflow paths are not affected by the use of the fan.(3) If the kinds of tracer gas used are restricted, the modeling should suppose the interconnected space to function like an imaginary duct. If the volume of the interconnected space is not considered in the calculation of airflow rates between zones, the results of the calculation is almost unaffected. In addition, we found that we can calculate the interzonal airflow rates between restricted zones by using some restricted tracer gases.

密闭房屋的气流分布应仔细设计，以防止未来出现空气质量问题。重要的是要了解气流路径和气流速率在这样的房子。计算室内通风量的一种方法是多重示踪气体技术，使用它的准确性并不总是用严格意义上的其他方法来评估。通常，大多数房子都没有测量气流速率的装置。因此，多重示踪气体技术可用于测量此类房屋中的气流速率。在本研究中，使用多重示踪气体技术测量了实际尺寸的试验房屋或模型空间的区域间气流速率。将多重示踪气体技术所得结果与其他方法如差压法所得结果进行比较，以评价示踪气体技术的准确性。多重示踪气体技术是通过使用实际大小的试验室或已知气流速率的模型空间来评估的。实验结果如下：(1)示踪气体法测定的数值误差在20% ~ 30%之间。这种精确度与前几份报告所显示的相似。(2)当气密性程度较低时（如5 cm D12 D1/m D12 D1），误差变大。由于大量的冷气流会产生气体浓度的极端分布，如果气流路径不受风扇使用的影响，则应使用风扇来扩散它们。(3)如果使用的示踪气体种类有限，则建模应假设互联空间像一个虚构的管道。如果在计算区域间气流速率时不考虑连通空间的体积，则计算结果几乎不受影响。此外，我们发现利用一些受限示踪气体可以计算出受限区域间的气流速率。

项目成果

西沢繁毅、絵内正道、島田潔、福島史幸: "換気量既知の模型空間を用いたトレーサーガス法の精度検証"空気調和・衛生工学会・北海道支部学術講演論文集. NO.34. 77-80 (2000)

Shigeki Nishizawa、Masamichi Euchi、Kiyoshi Shimada、Fumiyuki Fukushima：“使用已知通风量的模型空间进行示踪气体方法的精度验证”日本空调卫生工程师学会北海道分会学术讲座论文集NO。 .34. 77 -80 (2000)

福島史幸、絵内正道、落藤澄、島田潔、西沢繁毅: "ローエネルギーハウスを用いた夏期のパッシグ換気の検証"空気調和・衛生工学会・北海道支部学術講演論文集. NO.34. 181-184 (2000)

Fumiyuki Fukushima、Masamichi Euchi、Sumi Ochifuji、Kiyoshi Shimada、Shigeki Nishizawa：“使用低能耗房屋验证夏季帕西格通风”日本空调卫生工程师学会北海道分会学术讲座论文集第34号。 181 -184 (2000)

M. Enai, N. Aratani, C.Y. Shaw, H. Kajii, J. T. Reardon F. Fukushima: "Measurement of Interzonal Airflow Using Multiple Tracer Gas Techniques part-2"Transactions of SHASE of Japan. No.72. 117-127 (1999)

M. Enai、N. Aratani、C.Y.

S. Nishizawa, M. Enai, T. Mori: "Distribution of Airflow and Temperature in Highly Insulated and Airtight Hose by Using CDF"Branch Reports of SHASE. No.33. 187-190 (1999)

S. Nishizawa、M. Enai、T. Mori：“使用 CDF 在高度绝缘和气密软管中分布气流和温度”SHASE 分会报告。

絵内正道、荒谷登、C.Y.Show、梶井浩史、J.T.Reardon、福島史幸: "多種トレーサーガス法に基づく多数室換気量の算定第2報"空気調和・衛生工学論文集. NO.72. 117-127 (1999)

Masamichi Euchi、Noboru Araya、C.Y.Show、Hiroshi Kajii、J.T.Reardon、Fumiyuki Fukushima：“基于多示踪气体法的多房间通风计算第二次报告”《空调与卫生工程》第 72 期。 - 127 (1999)