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A Study on the Extreme use of cross-ventilation as a potential energy for air-conditioning purpose

Research Project

Project/Area Number 15360312
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Architectural environment/equipment
Research InstitutionTokyo University of Science

Principal Investigator

KURABUCHI Takashi  Tokyo University of Science, Faculty of engineering, Professor, 工学部, 教授 (70178094)

Co-Investigator(Kenkyū-buntansha) NAGAI Tatsuo  Tokyo University of Science, Faculty of Engineering, Lecture, 工学部, 講師 (00316001)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,000,000 (Direct Cost: ¥15,000,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2004: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2003: ¥10,700,000 (Direct Cost: ¥10,700,000)
KeywordsCross-ventilation / Local dynamic similarity model / Outflow openings / Computational fluid dynamics / k-epsilon two-equation model / Wind pressure coefficient / Cooling load reduction / Window operations / 通風 / 格子形状 / 屋根面利用 / 最小化問題 / システムシミュレーション / 省エネルギー / 風洞実験 / k-eモデル / エンタルピ / 流量係数 / 通風性能評価 / Large Eddy Simulation / 流出側開口部 / 冷房用エネルギー
Research Abstract

At first, Local Dynamic similarity model giving special notice on dynamic similarity of cross-ventilation was applied to the outflow openings. Cross-ventilation performance at the openings on outflow side was evaluated, and the structure of air flows around the outflow openings was studied by LES and wind tunnel experiment. It was found that LES reproduces the results of the wind tunnel experiment fairly well such as extensive increase of discharge coefficient in a small region where P_R^* value is low. The evaluation of the pressure field by LES revealed that the remainder of dynamic pressure in the air flows and the change of pressure field around the outflow openings give strong influence on discharge coefficient. Also, by identifying the configuration of the stream tube of ventilation air flow, it was found that discharge coefficient is changed depending on how the air flows go out. In general, dynamic pressure tangential to wall surface at the outflow openings is considered to be … More lower than that of the inflow side. The frequency of occurrence of P_R^* was investigated by actual-size experiment, and it was elucidated that the region of P_R^* where discharge coefficient is extensively decreased develops only very rarely.
In the second place, to evaluate wind pressure distribution on a building by using CFD (computational fluid dynamics), it has been generally practiced to use k-ε models. However, it is known that the use of the standard k-ε model has disadvantages such as overestimation of wind pressure coefficient and turbulent kinetic energy on the windward surface where wind impinges on the building. To overcome these problems, various modifications of the k-ε model have been proposed. In the present study, a number of modified k-ε models and k-ω model were applied for the estimation of wind pressure distribution on the building, which was designed in parallelepiped shape, and the characteristics in each of these models were confirmed. The results of the present study suggest that the modified k-ε model incorporating Durbin's limiter (model parameter α=0.5) showed satisfactory results for the estimation of wind pressure distribution. In the overall evaluation, the modified k-ε models (incorporating Durbin's limiter (α=0.65), RNG model (renormalization group theory) and Quadratic model) provided good results.
At the last, cooling load reduction by introducing cross-ventilation is estimated trough use of building simulation program, TRNSYS with COMIS. Results show the load reduction depends on the building characteristics and way of windows operation. Generally, lower reference temperature, i.e. higher internal heat gain, and lower heat loss coefficient, brings higher load reduction. Larger amount of building thermal capacity also associates the effect. For windows operation, several ways of operations are tested and compared. The reduction rate varies from 10 to 20 % for wooden detached house in suburban area in Japan, depending the way of windows operation. The cooling load is not drastically reduced solely by opening windows during occupied and waking period. Frequent window operations sensitive to ambient conditions especially during night and unoccupied period increase the effect of cross-ventilation. Less

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (34 results)

All 2006 2005 2004 2003 Other

All Journal Article (30 results) Publications (4 results)

  • [Journal Article] Windows and HVAC Operation to Reduce Cooling Requirement by Means of Cross-ventilation2006

    • Author(s)
      Tatsuo Nagai
    • Journal Title

      The International Journal of Ventilation Now Printing

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics.Part 1 Optimization of turbulence models for practical use2005

    • Author(s)
      T.Endo, T.Kurabuchi, et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT(PALENC 2005) Proceedings I

      Pages: 77-82

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics Part 2 Prediction accuracy of wind pressure distribution of various shaped building2005

    • Author(s)
      M.Ishii, T.Kurabuchi, et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT(PALENC 2005) Proceedings I

      Pages: 83-88

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics.Part 1 Optimization of turbulence models for practical use; Part 2 Prediction accuracy of wind pressure distribution of various shaped building2005

    • Author(s)
      T.Endo, T.Kurabuchi, et al.
    • Journal Title

      International Journal of Ventilation Vol.4,Num.3

      Pages: 269-284

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CFDによる建物風圧係数分布の予測制度に関する研究 その1各種乱流モデルの比較検討2005

    • Author(s)
      遠藤智行, 倉渕隆, 石井端樹, 駒村和彦
    • Journal Title

      日本建築学会大会学術講演梗概集 D・2

      Pages: 769-770

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CFDによる建物風圧係数分布の予測制度に関する研究 その2複雑な形状の建物の風圧係数予測制度の検討2005

    • Author(s)
      石井端樹, 倉渕隆, 遠藤智行, 丸山榮蔵, 澤地孝男
    • Journal Title

      日本建築学会大会学術講演梗概集 D・2

      Pages: 771-772

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Windows and HVAC Operation to Reduce Cooling Requirement by Means of Cross-ventilation2005

    • Author(s)
      Tatsuo Nagai
    • Journal Title

      The Second International Workshop on Natural Ventilation Proceedings

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics. Part 1 Optimization of turbulence models for practical use2005

    • Author(s)
      T.Endo, T.Kurabuchi et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT (PALENC 2005) Proceedings I

      Pages: 77-82

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distributions and air flow characteristics Part 2 Prediction accuracy of wind pressure distribution of various shaped building2005

    • Author(s)
      M.Ishii, T.Kurabuchi et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT (PALENC 2005) Proceedings I

      Pages: 83-88

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics. Part 1 Optimization of turbulence models for practical use ; Part 2 Prediction accuracy of wind pressure distribution of various shaped building2005

    • Author(s)
      T.Endo, T.Kurabuchi et al.
    • Journal Title

      International Journal of Ventilation Vol.4, Num.3

      Pages: 269-284

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the Numerical Predictive Accuracy of Wind Pressure Distribution and Air Flow Characteristics Part1 Comparison of Various Turbulence Models2005

    • Author(s)
      Tomoyuki ENDO, Takashi KURABUCHI et al.
    • Journal Title

      SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING ARCHITECTURAL INSTITUTE OF JAPAN, ENVIRONMENTAL ENGINEERING II D-2

      Pages: 769-770

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the Numerical Predictive Accuracy of Wind Pressure Distribution and Air Flow Characteristics Part2 Prediction accuracy of wind pressure distribution of various shaped buildings2005

    • Author(s)
      Mizuki ISHII, Takashi KURABUCHI et al.
    • Journal Title

      SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING ARCHITECTURAL INSTITUTE OF JAPAN, ENVIRONMENTAL ENGINEERING II D-2

      Pages: 771-772

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Windows and HVAC Operation to Reduce Cooling Requirement by Means of Cross-ventilation2005

    • Author(s)
      Tatsuo Nagai
    • Journal Title

      The Second International Workshop on Natural Ventilation, Proceedings

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics. Part 1 Optimization of turbulence models for practical use2005

    • Author(s)
      T.Endo, T.Kurabuchi, et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT(PALENC 2005) Proceedings I

      Pages: 77-82

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distributions and air flow characteristics Part 2 Prediction accuracy of wind pressure distribution of various shaped building2005

    • Author(s)
      M.Ishii, T.Kurabuchi, et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT(PALENC 2005) Proceedings I

      Pages: 83-88

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics. Part 1 Optimization of turbulence models for practical use ; Part 2 Prediction accuracy of wind pressure distribution of various shaped building2005

    • Author(s)
      T.Endo, T.Kurabuchi, et al.
    • Journal Title

      International Journal of Ventilation Vol.4, Num.3

      Pages: 269-284

    • Related Report
      2005 Annual Research Report
  • [Journal Article] CFDによる建物風圧係数分布の予測精度に関する研究 その1 各種乱流モデルの比較検討2005

    • Author(s)
      遠藤智行, 倉渕隆, 石井瑞樹, 駒村和彦
    • Journal Title

      日本建築学会大会学術講演梗概集 D-2

      Pages: 769-770

    • Related Report
      2005 Annual Research Report
  • [Journal Article] CFDによる建物風圧係数分布の予測制度に関する研究 その2 複雑な形状の建物の風圧係数予測精度の検討2005

    • Author(s)
      石井瑞樹, 倉渕隆, 遠藤智行, 丸田榮蔵, 澤地孝男
    • Journal Title

      日本建築学会大会学術講演梗概集 D-2

      Pages: 771-772

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Fundamental Study of Air flow Structure of Outflow Openings.2004

    • Author(s)
      Tomoyuki ENDO, Takashi KURABUCHI, et al.
    • Journal Title

      The International Journal of Ventilation Vol.2 No.4

      Pages: 438-446

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Fundamental Study on the Air flow Structure of Outflow Openings.2004

    • Author(s)
      Tomoyuki ENDO, Takashi KURABUCHI, et al.
    • Journal Title

      The International Journal of Ventilation Vol.2 No.4

      Pages: 438-446

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 流出開口部の通風性能評価に関する基礎的研究2003

    • Author(s)
      佐藤林太郎, 倉渕隆, 他
    • Journal Title

      空気調和・衛生工学会学術講演会講演論文集

      Pages: 1381-1384

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Fundamental Study of Air flow Structure of Outflow Openings.2003

    • Author(s)
      Tomoyuki ENDO, Takashi KURABUCHI, et al.
    • Journal Title

      The 1st International Workshop on Natural Ventilation

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 住宅における通風・冷房のスケジューリング -積算負荷を対象とした予備的検討-2003

    • Author(s)
      長井達夫
    • Journal Title

      空気調和・衛生工学会学術講演会講演論文集

      Pages: 1325-1328

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Fundamental Study on Evaluation of Cross-Ventilation Performance of Outflow Openings2003

    • Author(s)
      Rintaro Sato, Takashi Kurabuchi et al.
    • Journal Title

      Proceeding of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan

      Pages: 1381-1384

    • NAID

      110009742094

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Scheduling of Natural Ventilation and Air-Conditioning in Residential Houses -Preliminary Study for the Case of Cumulative Cooling Load-2003

    • Author(s)
      Tatsuo Nagai
    • Journal Title

      Proceeding of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan

      Pages: 1325-1328

    • NAID

      110009742080

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Windows and HVAC Operation to Reduce Cooling Requirement by Means of Cross-ventilation

    • Author(s)
      Tatsuo Nagai
    • Journal Title

      The International Journal of Ventilation 印刷中

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CFDによる建物風圧係数分布の予測制度に関する研究 その3格子再分割による改善効果

    • Author(s)
      遠藤智行, 倉渕隆, 野中俊宏
    • Journal Title

      日本建築学会大会学術講演梗概集 印刷中

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the Numerical Predictive Accuracy of Wind Pressure Distribution and Air Flow Characteristics Part3 Improvement Effects to the Predictive Accuracy by Refinement of Mesh

    • Author(s)
      Tomoyuki ENDO, Takashi KURABUCHI et al.
    • Journal Title

      SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING ARCHITECTURAL INSTITUTE OF JAPAN, ENVIRONMENTAL ENGINEERING (Now Printing)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distribution and air flow characteristics. Part 1 Optimization of turbulence models for practical use

    • Author(s)
      T.Endo, T.Kurabuchi, et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT (PALENC 2005) (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Study on the numerical predictive accuracy of wind pressure distributions and air flow characteristics Part 2 Prediction accuracy of wind pressure distribution of various shaped building

    • Author(s)
      M.Ishii, T.Kurabuchi, et al.
    • Journal Title

      PASSIVE AND LOW ENERGY COOLING FOR THE BUILT ENVIRONMENT (PALENC 2005) (発表予定)

    • Related Report
      2004 Annual Research Report
  • [Publications] 佐藤林太郎, 倉渕隆, 他: "流出開口部の通風性能評価に関する基礎的研究"空気調和・衛生工学会学術講演会講演論文集. 1381-1384 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Tomoyuki ENDO, Takashi KURABUCHI, et al.: "Fundamental Study of Air flow Structure of Outflow Openings."The 1^<st> International Workshop on Natural Ventilation. 11-1-11-9 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Tomoyuki ENDO, Takashi KURABUCHI, et al.: "A Fundamental Study on the Air flow Structure of Outflow Openings."The International Journal of Ventilation. Vol.2 No.4. 439-446 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 長井達夫: "住宅における通風・冷房のスケジューリング-積算負荷を対象とした予備的検討-"空気調和・衛生工学会学術講演会講演論文集. 1325-1328 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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