A Method for Estimating Discharge Coefficients of Openings between Multiple Rooms using One Type of Tracer Gas

• Project/Area Number: 21760450
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Architectural environment/equipment
• Research Institution: Kobe University
• Principal Investigator: FUJITA Koji Kobe University, 大学院・工学研究科, 助教 (40513536)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 隙間 / 流量係数 / 多室間換気 / トレーサーガス / ニュートン法 / 非線形連立方程式

Research Abstract

We found a new method for estimating effective flow areas not only in the external wall of a house but also in the internal walls between rooms using only one type of tracer gas. The discharge coefficient of each wall and the pressure in each room-which are unknown variables-are determined using nonlinear simultaneous equations, which consist of balance equations for the air mass and tracer-gas concentration in the rooms.

Research Products

• [Presentation] Effective flow area estimation method using a gas (2010)
  • Author(s): 藤田浩司
  • Organizer: AIVC International Conference 2010
  • Place of Presentation: (韓国)ソウル
  • Year and Date: 2010-10-27
• [Presentation] Effective flow area estimation test using CO2 (2010)
  • Author(s): 岩本憲
  • Organizer: AIVC International Conference 2010
  • Place of Presentation: (韓国)ソウル
  • Year and Date: 2010-10-27
• [Presentation] 単一ガス濃度測定による多数室間隙間量推定に関する研究-非線形連立方程式の数値解法を用いた隙間量推定法の検討- (2010)
  • Author(s): 岩本憲
  • Organizer: 日本建築学会大会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2010-09-09
• [Presentation] 単一ガス濃度測定による多数室間隙間量推定に関する研究-非線形連立方程式の数値解法を用いた隙間量推定法の検討- (2010)
  • Author(s): 岩本憲
  • Organizer: 日本建築学会近畿支部研究発表会
  • Place of Presentation: 大阪工業技術専門学校(大阪府)
  • Year and Date: 2010-06-19
• [Presentation] Effective flow area estimation method using a gas. (2010)
  • Author(s): Koji Fujita, Ken Iwamoto, Takayuki Matsushita.
  • Organizer: Proceedings AIVC International conference 2010
  • Place of Presentation: CD-ROM
• [Presentation] Effective flow area estimation test using CO2 (2010)
  • Author(s): Ken Iwamoto, Koji Fujita, Takayuki Matsushita.
  • Organizer: Proceedings AIVC International conference 2010
  • Place of Presentation: CD-ROM
• [Presentation] 単一ガス濃度測定による多数室間隙間量推定に関する研究-非線形連立方程式の数値解法を用いた隙間量推定法の検討- (2010)
  • Author(s): 岩本憲, 藤田浩司, 松下敬幸, 高田暁
  • Organizer: 日本建築学会大会学術講演梗概集環境工学II(D-2)(pp.643-644)
• [Presentation] 単一ガス濃度測定による多数室間隙間量推定に関する研究-非線形連立方程式の数値解法を用いた隙間量推定法の検討- (2010)
  • Author(s): 岩本憲, 藤田浩司, 松下敬幸, 高田暁
  • Organizer: 日本建築学会近畿支部研究報告集,第50号環境系(pp.189-192)