Mass Flow Rates and Performance of Natural Smoke Ventilators in High-rise Buildings

Chae-Hyun, Lim; Bum-Gyu, Kim; Yong-Hwan, Park

Journal of Korean Institute of Fire Science and Engineering 2009;23(6):91-97.
Published online December 31, 2009.

초고층건물에서 배연창의 풍량해석 및 배연성능

임채현, 김범규, 박용환

¹울산광역시시설관리공단²호서대학교 대학원³호서대학교 소방방재학과

Mass Flow Rates and Performance of Natural Smoke Ventilators in High-rise Buildings

Lim Chae-Hyun, Kim Bum-Gyu, Park Yong-Hwan

요약

본 연구에서는 현장실험결과를 바탕으로 모델링 해석을 통해 초고층건물에서 배연창이 가지는 배연성능의 경향성을 분석 및 평가하였다. 분석건물은 현장실험 대상건물인 40층 건물 외에 동일한 구조의 80층 및 120층 규모의 초고층건물로서 외기온도 TAC 2.5% 조건에서 건물의 층수, 배연창 개방방식 및 외벽의 기밀도가 배연창의 배연성능에 미치는 영향을 공기유동해석 프로그램인 CONTAMW 모델링을 통해 정량화된 분석결과를 도출하였다.

Abstract

The mass flow rates and performance of natural smoke ventilators in high-rise buildings with 40, 80, 120 stories were evaluated using CONTAMW tool. The results showed that only limited part of smoke ventilators can have positive exhaust flow in high-rise buildings due to stack effect and wind velocities. In the higher story buildings larger stack effect can overcome outside strong wind effect to give more ventilation performance. The air tightness of the building have strong effect on the exhaust performance of the ventilators to give lower performance with loose air tightness of the exterior walls.

Key Words: Mass flow, Stack effect, Wind velocity, High-rise building, Natural smoke ventilator