• 제목/요약/키워드: Fire current

검색결과 849건 처리시간 0.025초

항공기 엔진베이 내 소화장치 성능예측을 위한 전산해석방법 연구 (PREDICTION OF FIRE EXTINGUISH SYSTEM PERFORMANCE BY NUMERICAL METHOD)

  • 신훈범;서석주;정주현;유진복
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2010년 춘계학술대회논문집
    • /
    • pp.426-430
    • /
    • 2010
  • There is fire dangers inside engine bay where fuel of oil leakge can be ignited by hot engine surfaces. So, Fire suppressor is needed to extinguish the flames. The current FAA requirement is that the concentration level should be greater than 6% by volume throughtout the protected zone for longer than a half second simultaneously. To Satisfy the FAA requirement, The Fire extinguish system should quickly delivery the fire extinguish agents and Fire extinguish system should be designed effectively. This study is to develop and simulate the injection of fire extinguish agents into the engine-bay. Transient simulations were performed and predicted the concentration of fire extinguish agents at the certain locatioin in the engine-bay.

  • PDF

로봇의 소방방재분야 활용방안 연구 (Utilization of the robot's field of fire prevention research)

  • 이정일
    • 대한안전경영과학회:학술대회논문집
    • /
    • 대한안전경영과학회 2013년 춘계학술대회
    • /
    • pp.471-484
    • /
    • 2013
  • Large and complicated firefighting environment is accelerating in the early activities in the field of fire officials at the time limit situation leads to people's lives and property damage, as well as the loss of the Fire Service. Therefore, the state-of-the-art technology that can respond to rapidly changing fire environment urgently in the field of fire fighting have been introduced should be utilized. These intelligent firefighting robots build daegukmin firefighting safety net that can be used when. Other advanced technology industries, the most effective ways that can be introduced into the firefighting shall be provided in the current situation of the industry's initial firefighting robots.

  • PDF

화재저감정책의 현황과 개선과제 (Current Status of Fire Reduction Policy and Its Policy Impressions)

  • 조광희;김성일;강경식
    • 대한안전경영과학회지
    • /
    • 제19권3호
    • /
    • pp.19-25
    • /
    • 2017
  • To minimize and prevent the increasing fire and personal injury, the domestic firefighting organizations are making continuous efforts to strengthen the response system and safety standards. "Fire Reduction Program" has been prepared to reduce the outbreak of fire up to 20% in the next 10 years, and the analysis of fire sources should be done and its countermeasures also should be done accordingly. Therefore, the management status, the improvement tasks, and the limitations of the implementation plan are reviewed and studied so that the implementation and goal of the "Fire Reduction Policy" can be achieved.

복사열에 노출된 소방용 폼 약제의 열적 특성 연구 (Thermal Characteristics of Fire-Protection Foams Exposed to Radiant Heating)

  • 김홍식;황인주;김윤제
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2004년도 춘계학술대회
    • /
    • pp.1570-1575
    • /
    • 2004
  • In order to evaluate the performance of fire-fighting agents used to protect structures from heat and fire damages, the thermal characteristics of fire-protection foams are experimentally investigated. The current research focuses on the destruction of a fire-fighting foam subjected to heat radiation. A simple repeatable test for fire-protection foams subjected to fire radiation is developed. This test involves foam generation equipment, a fire source for heat generation, repeatable test procedures, and data acquisition techniques. Results of the experimental procedure indicated that each thermocouple within the foam responded in a similar manner and gradually to a temperature of $15^{\circ}C{\sim}20^{\circ}C$. At this point, each trace generally rises to a temperature of approximately $90^{\circ}C$. The temperature gradient in the foam as time passes increases with increased foam expansion ratio. In addition, it is determined that the temperature gradient along the foam for depth decreases with increased foam expansion ratio.

  • PDF

Fire Detection Method Using IoT and Wireless Sensor Network

  • Park, Jung Kyu;Roh, Young Hwa;Nam, Ki hun;Seo, Hyung Yoon
    • 한국컴퓨터정보학회논문지
    • /
    • 제24권8호
    • /
    • pp.131-136
    • /
    • 2019
  • A wireless sensor network (WSN) consists of several sensor nodes and usually one base station. In this paper, we propose a method to monitor topics using a wireless sensor network. Fire threatens people, animals, and plants, and it takes a lot of recovery time when a fire occurs. For this reason, it is necessary to use a fire monitoring system that is easy to configure and fast to avoid fire. In this paper, we propose a fast and easily reliable fire detection system using WSN. The wireless node of the WSN measures the temperature and brightness around the node. The measured information is transferred to the workstation and to the base station. The workstation analyzes current and historical data records to monitor the fire and notify the manager.

A Critical Review of Current Crisis Simulation Methodology

  • Kim, Hak-Kyong;Lee, Ju-Lak
    • International Journal of Contents
    • /
    • 제7권1호
    • /
    • pp.58-64
    • /
    • 2011
  • This paper is concerned with simulation exercises used to train key response agencies for crisis situations. While 'multi-agency' simulations are increasingly acknowledged as a necessary and significant training tool for emergency response organisations, many current crisis simulations are still focused on the revision of existing response plans only. However, a crisis requires a rapid reaction, yet in contrast to an 'emergency', the risks for critical decision makers in crisis situations are difficult to measure, owing to their ill-structure. In other words, a crisis situation is likely to create great uncertainty, unfamiliarity and complexity, and consequently should be managed by adaptive or second order expertise and techniques, rather than routine or structured responses. In this context, the paper attempts to prove that the current practices of simulation exercises might not be good enough for uncertain, unfamiliar, and complex 'crisis' situations, in particular, by conducting case studies of two different underground fire crises in Korea (Daegu Subway Fire 2003) and the UK (King's Cross Fire 1987). Finally, it is suggested that the three abilities: 'flexibility', 'improvisation' and 'creativity' are critical in responding to a crisis situation.

하이브리드 인터락을 적용한 점화회로 설계 (The Design of Squib Circuit using Hybrid Interlock)

  • 장부철;조길석;신진범;구봉주
    • 한국군사과학기술학회지
    • /
    • 제17권4호
    • /
    • pp.404-412
    • /
    • 2014
  • We proposed a design method for squib current supply & interlock circuits in guided-missile fire control systems. In order to design squib current supply circuits, various missile squib loads including line resistance and squib devices have to be considered in advance minimizing probability of redesign of circuits and reducing the development cost by implementing the most proper squib current supply circuit. Also, we presented a hardware interlock logic instead of the commonly used software safety logic to improve the safety of guided-missile fire control systems. The proposed squib interlock circuit enhances safety requirements of guided-missile fire control systems. We confirmed that simulation and measurement results of the proposed design method are the same as theoretical analysis results.

일상생활 환경에서의 소화기 비치 실태와 소화기 인식에 관한 연구 (Research on the Current Status of Installation and Awareness of Fire Extinguishers and Awareness of Fire Extinguishers)

  • 이원주;권신영;이창섭
    • 한국화재소방학회논문지
    • /
    • 제29권6호
    • /
    • pp.26-32
    • /
    • 2015
  • 본 논문은 우리나라 성인남녀의 일상생활의 소화기 비치실태 및 인식을 설문조사를 통하여 파악하고, 이를 바탕으로 화재안전교육에서 소화기 부분에 대한 교육 방향 및 시사점을 찾고자 하는 목적으로 수행하였다. 설문분석 결과, 소화기 비치 현황에서 연구 대상자의 47.9%는 가정에서 소화기를 비치하고 있지 않은 것으로 나타난 반면 생활공간(학교, 직장 등)은 93.2%가 소화기를 비치하고 있는 것으로 나타났다. 소화기 교육 경험에서 연구 대상자의 약 90%는 소화기 사용방법에 대한 교육 경험이 있는 것으로 나타났다. 현재 생활공간(학교, 직장 등)에서 정기적인 소방교육은 65.8%만이 실시되고 있는 것으로 나타났다. 또한 최근 1년 동안 소화기 사용방법에 대한 교육을 한 번도 받지 못한 사람들은 42.5%인 것으로 나타났다. 소화기 지식분야에서 연구 대상자는 소화기 사용방법에 대해 평균 3.95점/5.00점의 점수를 보여 가장 높은 값을 보이고 있는 반면 ABC 소화기에 대한 의미에 대해서 평균 3.00점/5.00점으로 가장 낮은 값을 보이고 있었다. 연구대상자의 '가정에서의 소화기 비치 현황' 및 '현재 생활 영역에서 정기적 소방안전교육의 실시'는 '소화기 지식'에 유의미한 영향을 주는 것으로 나타났다(p < .05). 더하여 연구대상자의 '최근 1년 동안 소화기 사용방법에 대한 교육 횟수'와 '소화기 지식'에 대한 연관성을 보기 위해서 ANOVA 분석을 실시하였고, 통계적으로 유의한 것으로 분석되었다(F = 30.45, p < .05).