Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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A Study on the Application Evaluation of Double Damper to Prevent Headwinds in Building Direct Exhaust System

건축물 직배기 시스템의 역풍방지를 위한 이중댐퍼의 적용성 평가에 관한 연구

  • 천창현 (영남대학교 일반대학원 건축학과) ;
  • 손유라 (영남대학교 일반대학원 건축학과) ;
  • 금하영 (영남대학교 일반대학원 건축학과) ;
  • 양정훈 (영남대학교 건축학부)
  • Received : 2021.07.23
  • Accepted : 2021.10.08
  • Published : 2021.10.30
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Abstract

The air supply and exhaust ports of the direct exhaust system installed outside the building are pressurized by external wind pressure, which results in poor exhaust performance. The purpose of this study is to evaluate the performance of Double Damper developed to improve the exhaust performance of the direct exhaust system degraded by external wind. When external wind is generated through CFD analysis, the distribution of air flow velocity and internal static pressure of Double Damper are analyzed. As a result, the exhaust air flow from the exhaust system was emitted to the second exhaust section of Double Damper. In the case of downwash during external wind, there was no inflow of external wind through the vent cap because the internal static pressure of the Double Damper represents a negative value. The external wind was reproduced with headwinds of 0o, 23o, 45o, 68o and 90o based on vent cap. When Double Damper was installed, the exhaust system had a flow rate growth rate of up to 14.14%. Double Damper was able to improve headwind blocking and exhaust performance if the headwind was greater than exhaust emission and static pressure. Double Damper confirmed that it is effective when using a vent cap that is vulnerable to headwind.

Keywords

Acknowledgement

이 연구는 한국연구재단의 지원을 받아 수행된 연구임. 과제번호:2018R1D1A1B07043717

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