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

Research Project

Project/Area Number 13650656
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Architectural environment/equipment
Research InstitutionOsaka City University

Principal Investigator

NISHIOKA Toshiaki  Osaka City University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (00254384)

Co-Investigator(Kenkyū-buntansha) OKURA Ryozi  Osaka City University, Graduate School of Engineering, Assistant Researcher, 大学院・工学研究科, 助手 (10047392)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsMethod 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
Research Abstract

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

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (9 results)

All 2004 2003 2000 Other

All Journal Article (8 results) Publications (1 results)

  • [Journal Article] Dynamic Pressure Method For The Air-tightness Of The Building2004

    • Author(s)
      Q.Chen, T.Nishioka
    • Journal Title

      Proceedings of the 7^<th> International Symposium on Building and Urban Environmental Engineering

      Pages: 273-278

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Dynamic Pressure Method For The Airtightness Of The Building2004

    • Author(s)
      Q.Chen, T.Nishioka et al.
    • Journal Title

      Proceedings of the 7^<th> International Symposium on on Building and Urban Environmental Engineering

      Pages: 273-278

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] 変動圧法を用いた建物の気密性測定法に関する研究2003

    • Author(s)
      藤原清隆, 西岡利晃他
    • Journal Title

      日本建築学会大会学術講演梗概集 D-II 環境工学2

      Pages: 713-714

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Unsteady pressurization method to measure the air-tightness of the building envelope2003

    • Author(s)
      T.Nishioka
    • Journal Title

      Proceedings of the 2nd International Building Physics Conference

      Pages: 771-774

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Unsteady pressurization method to measure the air-tightness of the building envelop.2003

    • Author(s)
      K.Fujiwara, T.Nishioka et al.
    • Journal Title

      Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan D-2

      Pages: 713-714

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Unsteady pressurization method to measure the airtightness of the building envelope2003

    • Author(s)
      T.Nishioka et al.
    • Journal Title

      Proceedings of the 2nd International Building Physics Conference

      Pages: 273-278

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] A New Technique for Measuring Air-tightness of the Building Envelope Using Pulse Pressurization2000

    • Author(s)
      Toshiaki Nishioka
    • Journal Title

      Proceedings of the Ventilation 2000 2

      Pages: 80-83

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] A New Technique for Measuring Air-tightness of the Building Envelope Using Pulse Pressurization2000

    • Author(s)
      Toshiaki Nishioka
    • Journal Title

      Proceedings of the Ventilation Vol.2

      Pages: 80-83

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 藤原清隆他: "変動圧法を用いた建物の気密性測定法に関する研究"日本建築学会大会学術講演梗概集D-II 環境工学2. 別巻. 713-714 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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