• Title/Summary/Keyword: Smoke ventilator

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A Basical Study about Ventilation Performance of Natural Smoke Ventilators through Stack Effect in High-rise Building (고층건축물에서의 연돌효과에 따른 배연창의 배연성능에 관한 기초적 연구)

  • Kim, Hye-Won;Jin, Seung-Hyun;Koo, In-Hyuk;Kwon, Young-Jin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.11a
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    • pp.54-55
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    • 2017
  • The High-rise building has a problem the ventilation performance of natural ventilator by stack effect that it occurs by pressure difference. For that reason the study about natural smoke ventilator of High-rise building consistently needs. Therefore on this study does analysis of difference with abroad through investigate of Natrual smoke ventilator's law, it conducts of natural smoke ventilator's research on the actual condition. As a result on this study, in the case of abroad that it states more specific standards than domestic. Also the result of a field study, it shows that the natural smoke ventilator is installed same size and the number regardless of building's pressure difference.

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A Study on Securing Safety of Evacuation through Smoke Control in Case of Fire at the Central Corridor Type Intelligent Buildings (중복도형 인텔리전트빌딩 화재시 연기제어를 통한 피난안전성 확보에 관한 연구)

  • Min, Se Hong;Lee, Jae Moon;Bae, Yeon Jun
    • Journal of the Korea Safety Management & Science
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    • v.17 no.2
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    • pp.117-127
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    • 2015
  • This study investigated the smoke blocking and control systems for the safety of residents evacuation and for the prevention of smoke spread through the central corridor in the event of central corridor type of intelligent building fire. We offered additional ways of utilizing smoke ventilators and intake ventilation equipment and utilized CFD-based fire simulation program(FDS Ver.5.5.3) in order to analyze the effect. As a result, many differences in the smoke block effect, depending on the application of smoke ventilator and location of installation, was found. In addition, the result was found that larger effect was showed not in the case of application of smoke ventilator in central corridor only but application in fire room. The reason is that the smoke leakage is blocked primarily as air is flowed in the fire room through open door by operation of intake smoke ventilator in the public corridor and secondarily, the smoke leakage to the public corridor could be blocked as fire and smoke were released to the opened smoke ventilator continuously. Especially, the effect was maximized through complex interactions by applying smoke ventilator and intake ventilation equipment in corridor together rather than applying smoke ventilator and intake ventilation equipment independently. The proposed measure through this study shall be considered from architectural plan as one of ways for blocking from smoke spread to the central corridor in the central corridor type of intelligent building. In addition, flaws on regulation shall be established and supplemented.

The Performance Evaluation of Natural Smoke Ventilators Due to Stack Effect and Wind Velocities in High-rise Buildings (고층건물에서 연돌효과 및 외기풍속에 따른 배연창의 배연성능 평가)

  • Lim, Chae-Hyun;Kim, Bum-Gyu;Park, Yong-Hwan
    • Fire Science and Engineering
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    • v.23 no.6
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    • pp.82-90
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    • 2009
  • Natural smoke ventilator is one of domestic prescriptive methods to be used to exhaust smoke in case of fire in a high-rise buildings. The goal of this study is to evaluate the stack effect and the smoke exhaust performance in high-rise buildings with the opening of natural smoke ventilators using computer modeling technology, thus to estimate its effectiveness as a tool of smoke exhaust. For this purpose, the pressure differential in a domestic high-rise building with natural smoke ventilators was experimentally measured to analyze the stack effect with the closure or the opening of natural smoke ventilators and to calculate compensated air leakage of the building. Computer modeling based on experimentally measured data was carried out to estimate effectiveness of natural smoke ventilators in high-rise buildings using CONTAMW network program.

Study of the Problems and Improvements of the Installation and Maintenance for Natural Smoke Ventilators in Buildings (국내 배연창 설치 및 유지관리의 문제점과 개선방안에 관한 연구)

  • Yun, Hi-Won;Choi, Seung-Hyuck;Ryu, Hyung-Kyou
    • Fire Science and Engineering
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    • v.30 no.6
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    • pp.118-123
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    • 2016
  • In the event of a building fire, it is important to control the smoke generated to ensure the safe evacuation of occupants. A natural smoke ventilator should be installed to exhaust the fire smoke in accordance with the Korean building Act and Code. On the other hand, the present law does not specify the contents regarding natural smoke ventilators sufficiently. The problems that occur in various parts, such as the installation target, installation location, free area, and the control and maintenance of natural smoke ventilators need to be solved. In this study, the problem of the current system was examined through domestic and foreign standards, preliminary research, and field investigations. In addition, suggestions for improvement are provided.

Performance Evaluation of a Natural Smoke Ventilator in Jeju (배연창의 개방층 설정방식에 따른 배연성능 평가 연구(제주지역 중심으로))

  • Lim, Chae-Hyun
    • Fire Science and Engineering
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    • v.30 no.1
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    • pp.6-11
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    • 2016
  • This study analyzed the performance of smoke exhaustion installed to secure the life safety from the smoke each opening modes, as performing the simulation on the Jeju regions generating to strong windy using CONTAM. We assessed the effectiveness of the system under conditions of high external winds as well as an ambient wind conditions. It also assessed the relative effectiveness of opening all vents versus opening only those vents which served rooms in which the fire was located. This study revealed external winds exerted a substantial impact on the performance of the smoke ventilation system. It was found that opening the ventilation system in the room containing the fire resulted in a greater performance than opening vents in both fire in all rooms. The reduced performance of the smoke ventilation system upon the opening of all vents is thought to be due to the intrusion of outside air, and the establishment of unfavorable air circulation, caused by the negative pressure generated in the building.

Effect of Positive Pressure Ventilator Tilting Angle on the Flame Suppression and Smoke Density (Positive Pressure Ventilator 경사각 변화에 의한 화염억제 효율과 연기농도 변화)

  • Kim, Sung-Won;Lee, Kyoung-Duck;Shin, Chang-Sub
    • Fire Science and Engineering
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    • v.20 no.4 s.64
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    • pp.135-142
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    • 2006
  • The experiment applied Positive Pressure Ventilation to rapidly exhaust heat and smoke inside the construction in the fire was done. Changes of heat discharge and smoke density were measured, with the various blowing condition like a fan tilting angle to find the effect of the parameter. Experimental apparatus were with PPV and water mist system for better efficiency, and investigate the effect of heat discharge and smoke removal. In the experiment, flame temperature has decreased when PPV was applied. Smoke density, generated from fire also decreased dramatically and the efficiency showed the highest rate at $0^{\circ}$ tilting angle. In addition, combination of PPV and water mist system highly improved the efficiency of evacuation on heat and smoke density, clearly was influenced by the tilting angle.

Vestibule Smoke Control Considering the Stack Effect and the Opening of the Outside Door (굴뚝효과와 외부출입문 개방을 고려한 부속실 제연)

  • Yongkwang Kim;Zudal Son;Seoyoung Kim;Hasung Kong
    • Journal of the Korea Safety Management & Science
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    • v.26 no.1
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    • pp.15-24
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    • 2024
  • The purpose of this study is to improve the stack effect of the staircase and the failure to take into account the opening of the outside door of the staircase, which are the disadvantages of the existing smoke control only vestibule. As a result of the study, the new vestibule and the staircase simultaneous smoke control are equipped with an exhaust flap damper with an effective opening area of about 0.25 m2 in the upper part of the staircase, and a ventilator-type air supply fan of about 5 m3/s in the lower part, and take measures to prevent overpressure in the staircase. If you use the new simultaneous smoke control method of the vestibule and staircase, you can achieve the following effects. First, it is possible to open the external entrance door. Second, it can reduce the stack effect. Third, the staircase door closes automatically without fail. And a new method of preventing overpressure was proposed for the vestibule.

Experiments on the Influence of Opening of Natural Smoke Ventilators on the Stack Effect in High-rise Mixed-use Residential Buildings (초고층주상복합건물에서 배연창 개방이 연돌효과에 미치는 영향에 대한 실험적 연구)

  • Lim, Chae-Hyun;Kim, Bum-Gyu;Park, Yong-Hwan
    • Journal of the Korean Society of Hazard Mitigation
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    • v.9 no.3
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    • pp.89-94
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    • 2009
  • The stack effect in high-rise buildings is expected more significant at nights in winter due to the large temperature difference between the inside and outside of the buildings. However, the existence of large openings such as natural ventilators on the floor may effect the position of neutral plane, smoke spread at fire and thus obstruct the door openings for rescue. In this paper, the vertical and horizontal pressure distribution with different openings of natural smoke ventilators was experimentally analyzed by investigating pressure differentials.

Mass Flow Rates and Performance of Natural Smoke Ventilators in High-rise Buildings (초고층건물에서 배연창의 풍량해석 및 배연성능)

  • Lim, Chae-Hyun;Kim, Bum-Gyu;Park, Yong-Hwan
    • Fire Science and Engineering
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    • v.23 no.6
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    • pp.91-97
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    • 2009
  • 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.

The Influence of Natural Smoke Ventilators and Wind Velocities on the Stack effect in High-rise Buildings (배연창 및 외기풍속이 초고층 건축물의 연돌효과에 미치는 영향)

  • Lim, Chae-Hyun;Kim, Bum-Gyu;Yeo, Yong-Ju;Park, Yong-Hwan
    • Fire Science and Engineering
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    • v.22 no.4
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    • pp.20-26
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    • 2008
  • The performance of natural smoke ventilators in High-rise buildings was analyzed by investigating the stack effect depending on the wind velocities using CONTAMW tool. The results showed that the opening of smoke ventilators can influence on the stack effect in the building thus moving the position of the neutral plane toward the opened smoke ventilators. The outside wind velocities can move up the neutral plane toward the top of the building thus increasing pressure differentials at the bottom of the building. The smoke ventilators can maintain its normal performance without outside wind, however, strong outside wind can prevent natural smoke exhaust due to the infiltration of outside air at the ventilators.