• Title/Summary/Keyword: 화재 시나리오

Search Result 289, Processing Time 0.019 seconds

A Study on Distribution of Smoke Temperature in a Road Tunnel with Scenarios (시나리오에 따른 터널 내 연기 온도 분포 특성에 관한 연구)

  • Ju, Eun-Hye;Yoon, Yong-Kyun
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
    • /
    • 2013.04a
    • /
    • pp.160-161
    • /
    • 2013
  • 환기구의 유무, 환기구 설치 대수, 환기구 용량 등을 변수로 한 5개의 시나리오를 가정하여 터널내 연기 온도 분포의 특성을 분석하였다. 해석 결과 환기구의 설치 대수를 증가시킴에 따라 연기 온도는 감소하였으며, 환기구가 2대에서 3대로 증가하는 경우 온도 감소 효과는 크지 않은 것으로 나타났다. 환기구의 용량을 증가시키는 경우 환기구를 설치하는 것과 유사한 온도 감소 효과를 나타내었다.

  • PDF

Development of Human Model for the Egress Simulation (국내 피난시뮬레이션 개발을 위한 Human Model개발)

  • Youn, Ho-Ju;Hwang, Yen-Kyung;Kim, Jong-Hoon
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
    • /
    • 2010.04a
    • /
    • pp.526-529
    • /
    • 2010
  • 국내에서는 철도차량의 화재안전성능을 향상시키기 위해 성능평가를 적용하기 위한 연구가 진행되고 있다. 철도차량에서의 화재 시 피난은 여러 가지 시나리오들이 존재하며, 이중 하나가 터널내부에서 정전이 되어 무조명상태가 되는 것이다. 철도차량은 물리적 공간적 환경이 건축물과 차이가 있다. 또한 문화적 인종적 차이로 인해 외국의 데이터를 바로 적용하는 것도 바람직한 일은 아니다. 그러므로 시나리오를 분석하기 위해 필요한 데이터는 실험을 통해 확보해야할 필요성이 있는 것이다. 무조명 상태에서의 피난인의 행태와 이동속도의 차이 등을 분석하기 위해 실험을 수행하고 그 결과를 분석해 보았다.

  • PDF

Experiments of Horizontal Movement in Train Car on Non-lighting (철도차량에서의 무조명 상태 시 수평이동에 관한 실험)

  • Kim, Jong-Hoon;Kim, Woon-Hyung;Roh, Sam-Kew;Lee, Duck-Hee;Jung, Woo-Sung
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
    • /
    • 2010.04a
    • /
    • pp.506-509
    • /
    • 2010
  • 국내에서는 철도차량의 화재안전성능을 향상시키기 위해 성능평가를 적용하기 위한 연구가 진행되고 있다. 철도차량에서의 화재 시 피난은 여러 가지 시나리오들이 존재하며, 이중 하나가 터널내부에서 정전이 되어 무조명상태가 되는 것이다. 철도차량은 물리적 공간적 환경이 건축물과 차이가 있다. 또한 문화적 인종적 차이로 인해 외국의 데이터를 바로 적용하는 것도 바람직한 일은 아니다. 그러므로 시나리오를 분석하기 위해 필요한 데이터는 실험을 통해 확보해야할 필요성이 있는 것이다. 무조명 상태에서의 피난인의 행태와 이동속도의 차이 등을 분석하기 위해 실험을 수행하고 그 결과를 분석해 보았다.

  • PDF

Autoencoder Based Fire Detection Model Using Multi-Sensor Data (다중 센서 데이터를 활용한 오토인코더 기반 화재감지 모델)

  • Taeseong Kim;Hyo-Rin Choi;Young-Seon Jeong
    • Smart Media Journal
    • /
    • v.13 no.4
    • /
    • pp.23-32
    • /
    • 2024
  • Large-scale fires and their consequential damages are becoming increasingly common, but confidence in fire detection systems is waning. Recently, widely-used chemical fire detectors frequently generate lots of false alarms, while video-based deep learning fire detection is hampered by its time-consuming and expensive nature. To tackle these issues, this study proposes a fire detection model utilizing an autoencoder approach. The objective is to minimize false alarms while achieving swift and precise fire detection. The proposed model, employing an autoencoder methodology, can exclusively learn from normal data without the need for fire-related data, thus enhancing its adaptability to diverse environments. By amalgamating data from five distinct sensors, it facilitates rapid and accurate fire detection. Through experiments with various hyperparameter combinations, the proposed model demonstrated that out of 14 scenarios, only one encountered false alarm issues. Experimental results underscore its potential to curtail fire-related losses and bolster the reliability of fire detection systems.

A Study on the Pressure Change during the Pressurization to the Elevator Lobby (부속실 급기가압 시 압력특성 변화에 관한 연구)

  • Kim, Beom-Kyue;Park, Yong-Hwan;Kim, Hong-Sik
    • Fire Science and Engineering
    • /
    • v.26 no.5
    • /
    • pp.99-104
    • /
    • 2012
  • This study investigated the pressure change in the fire room and elevator lobby during the air pressurization to the Elevator lobby with the various egress scenarios and the existence of vent holes in the fire room. The experiments revealed that pressure change was significantly affected by the open/closure scenarios of the front door and stairway door resulting in over pressure, under pressure and performance drop of the door closure. It also revealed that the required smoke defensive air velocity can be obtained only with the existence of vent holes in the fire room by the removal of back pressure in the fire room.

An experimental study on development of water mist fire-fighting systems for Ro-Ro spaces (Ro-Ro 구역용 미분무 소화설비의 개발을 위한 실험적 연구)

  • Kwark, Ji-Hyun;Kim, Young-Han
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.37 no.8
    • /
    • pp.946-952
    • /
    • 2013
  • Large scale fire tests were conducted to develop water mist nozzles as a component of fixed water- based fire fighting systems for Ro-Ro spaces and special category spaces. Fire scenarios for this system consist of two cases which are for cargo fire in a simulated truck and for passenger vehicle fire, and each case has 3 different tests according to the position between fixed water mist nozzles and fire source. Every experiment proceeded for 30 minutes and acceptance criteria were based on gas temperature, fuel package's damage and ignition of targets. This study primarily dealt with the experimental results of cargo fire and focused on fire suppression capability in accordance with discharge pressure, flow rate and flow characteristics like swirl and penetration of the developed water mist nozzles. It appeared that low pressure water mist nozzles with about 40 L/min were able to control fire occurred in Ro-Ro spaces.

A Study on the Range of Damage Effects of Benzene Leakage Accidents using the KORA Program (KORA 프로그램을 활용한 벤젠 누출사고 피해영향범위에 관한 연구)

  • Cha, Jeong-Min
    • Fire Science and Engineering
    • /
    • v.33 no.4
    • /
    • pp.112-120
    • /
    • 2019
  • Benzene is a class 4 hazardous material according to the Act on the Safety Control of Hazardous Substances. This study qualitatively evaluated the damage size of a "toxic" accident and "pool fire" accidents based on benzene in a virtual scenario of a fire and leakage accident during unloading at a port facility. The KORA program was used as an evaluation method, which is supported as a universal program by the National Institute of Chemical Safety. The range of damage effects of a benzene-induced fire and leakage accident was predicted. In the case of toxic damage range, the accident's damage effect range for the "worst case scenario" was reduced by up to 5.11% with a decrease in the size of the leakage hole. In the case of the leakage time, the damage effect range increased to 145.12% with a 10 min leakage time compared to that of a 5 min leakage time and went up to 20 min (212.29%) with a 20 min leakage time. In the case of pool-fire-induced damage, the damage effect range by radiant heat in the "worst case scenario" was 228.8 m in radius from the center of the handling facility. In the "alternative scenario," the damage effect range by radiant heat was reduced by up to 8.26% compared to that in the "worst case scenario" since the size of the leakage hole was decreased by reducing the cross-sectional area of the pipe.

Scenarios for Effective Fire Fighting Operations during Tunnel Fires (도로터널 화재시 효과적인 소방활동전략 수립을 위한 시나리오 연구)

  • Kim, Hak kuen;Lee, Ji-hee
    • Fire Science and Engineering
    • /
    • v.31 no.5
    • /
    • pp.107-116
    • /
    • 2017
  • Fires in tunnels are an international concern and fatal accidental fires in tunnels seem to occur on annual. They have the potential to become much worse int the future as more and longer tunnels are constructed and as traffic densities increase. This is a serious problem. The main purpose of this study is to develop operational procedures for fire brigades in road tunnel fires. This study discussed the past to see what can be learned from the incidents that have already done in tunnels. 73 cases of road tunnel fires domestic and outside of Korea were investigated and classified into 4 incident categories. Among them, 4 tunnel fires are highlighted, focusing on the activities of fire brigades and operation. Regarding the establishment of the strategies for fire fighting, 6 kinds of fire scenario curves have been deducted with regard to the relation between intervention time and heat release rate. It made the choice from the defensive or aggressive fire fighting activities depending on two criteria i.e. response limit and maximum response time. Road Tunnel Classification models can be useful when a fire brigade evaluates fire risk levels in the tunnels under its jurisdiction from the firefighting point of view and sets up preventive measures.

A Study on the Effectiveness to the Life Safety by Enlarging Smoke Vent Size and/or Sprinklered System (배연창 크기와 스프링클러 작동이 인명안전에 미치는 영향 연구)

  • Kim, Hak-Joong;Park, Yong-Hwan;Lim, Choe-Hyun;Kim, Bum-Kyu
    • Fire Science and Engineering
    • /
    • v.24 no.2
    • /
    • pp.133-138
    • /
    • 2010
  • Recently, evacuation safety of a resident of building become the major concern, because building has been higher and more complicated. Buildings in Korea should install the natural smoke venting or mechanical smoke exhaust equipment according to the building law. The smoke control is the most important to guarantee the evacuation safety. This study evaluate the influence to the height and temperature of smoke layer by enlarging smoke vent size and operating sprinkler system using CFAST (Version 6). Smoke venting size is larger, the effect to height and temperature of smoke layer is increased in below 5 MW fire. But, the correlation of these is decreased in above 10 MW fire. The case that opened smoke vent and sprinklered are applied, life safety criteria are satisfied regardless of fire size. After design the fire scenario according to the service and size of building. Install the smoke vent suitable for the fire size and verify that by experiment or simulation.

A Comparative Study of Computational Fire Models for Fire Safety Analysis of Nuclear Power Plant (원자력 발전소 화재안전해석을 위한 전산화재모델의 비교 연구)

  • Kim, Sung-Chan;Kim, Jung-Yong;Yoon, Jung-Sook;Lee, Eun-Shin
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
    • /
    • 2012.04a
    • /
    • pp.420-423
    • /
    • 2012
  • 원자력 발전소는 화재 발생 시 대규모 피해를 야기하는 특수한 시설물로서 일반 건축물에 비하여 매우 엄격한 화재 안전 기준을 적용하고 있으며 일반 건축물과 차별화된 화재안전 설계 조건을 요구한다. 본 연구에서는 원자력 발전소의 화재안전성을 평가하기 위한 기초연구로써 원자력 발전소 내 주 제어실(이하 MCR)에 대해 화재시나리오 및 환기조건에 따른 화재해석모델의 계산결과를 비교분석하여 각 해석모델의 특성을 파악하고자 한다. MCR 내 화재안전성을 평가하기 위해 Field Model인 FDS 와 Zone Model인 CFAST를 이용하였으며 NUREG/RC-6850, NUREG/RC-1894에 기초하여 화재시뮬레이션을 수행하였다. 해석결과로써 연기농도, 가시거리, 연층높이 등의 데이터를 분석하여 MCR내의 거주가능 시간을 평가하였으며 이를 통해 원자력 시설물의 안전성 확보를 위한 정량적인 자료를 제공하고자 한다.

  • PDF