• Title/Summary/Keyword: 화재 방호 설비

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A study on gaseous fire extinguishing system adaptability using the door fan test (Door Fan Test를 활용한 가스계 소화설비의 적응성 검증 방안 연구)

  • Lee, Chang-Wook;Yun, A-Young;Na, Jin-Seok;Um, Ki-Ju
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2010.10a
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    • pp.99-102
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    • 2010
  • 가스계 소화설비는 소화약제의 특성상 방호구역내의 누설면적에 민감하게 영향을 받고, 누설면적이 너무 크면 제대로 된 소화성능을 발휘 할 수 없기 때문에 설계 및 시공, 그리고 설치 후 성능 검증 등에 주의가 필요하다. 이전 가스계 소화설비의 성능확인방법으로 종래에는 소화약제 전량을 직접방출하거나 극히 일부 저장용기의 소화약제만을 방출시키는 소위 간이시험을 실시하는 것이 보편적이었으나, 방출시험은 고비용, 일회성 및 시험절차의 난이성, 그리고 환경오염으로 인해 실제 방출시험을 통한 설비의 신뢰성 확인이 어려운 실정이다. 이러한 상황을 감안하여 가스계 소화설비의 성능검증을 위해 Door Fan Test를 활용하는 방안에 대하여 알아보고자 한다.

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A Study on the Precautions Effects of the Enclosure Integrity Test for the Gaseous Extinguishing Systems: Focusing on the Power Plant (가스계 소화설비의 밀폐도 시험에 영향을 미치는 사전조치에 관한 연구: 발전소를 중심으로)

  • Kim, Young-Chul;Jo, Il-Hyun;Lee, Su-Kyung
    • Fire Science and Engineering
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    • v.29 no.1
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    • pp.60-66
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    • 2015
  • The present study was aimed to analyze enclosure integrity test, which is the performance experiment of soaking time, in a fire zone equipped with gaseous extinguishing system in an effort to find understand the effect of precaution factors upon the success of fire extinguishment. To achieve the goal of this study, it divided the fire zones of internal and external power plants into ones taking precaution measures and not taking them and then enclosure integrity test was given respectively. Therefore, this study examined the success rate if the test according to the presence and absence of the precaution measure and confirmed the failure factors, designed concentration soaking time and proportion of leakage area to total volume area by type of gaseous extinguishing system and rooms. Precaution measures were applied to the fire zones without them to confirm the increase of the success rate of enclosure integrity test. By doing so, it was found that reduced number of experiments caused by failure led to cost saving.

A Study on a PCB Manufacturing Plant's Fire Risk Assessment due to the Mitigation of Fire Protection Zone and an Improvement Way through Estimation of Sprinkler Demand Water Flow Rate (방화구획 완화에 따른 PCB공장의 화재위험평가 및 스프링클러 요구살수유량 산정을 통한 기준개선안에 관한 연구)

  • Oh, Chan-Wook;Oh, Ryun-Seok;Choi, Jun-Ho
    • Fire Science and Engineering
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    • v.33 no.2
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    • pp.56-62
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    • 2019
  • A sprinkler is a fire extinguishing equipment installed in a protected area where a detector or head detects a fire and automatically puts out the fire. However, the Ministry of Land, Infrastructure and Transport's "Regulations on Building Evacuation and Fire Protection Standards, etc." stipulate that fire compartment area should be reduced to three times by installing sprinkler facilities in the case of factories and warehouses. In this study, fire hazard was analyzed for a real PCB factory which mitigated the fire protection zone by sprinkler installation, and the head opening characteristics of sprinkler facilities through computer simulation, installation standards of sprinkler facilities, thermal performance, operating range, and the amount of water sprayed to identify the problems of operation of sprinkler facilities in case of fire, and to suggest the grounds such as required sprinkling flow rate for system improvement.

A Study on On-site Discharge Testing for Carbon Dioxide Fire Extinguishing Systems (이산화탄소 소화설비 현장 방출시험 방법론에 관한 고찰)

  • Park, Jun-Hyun;Kang, Tae-Seok;Kim, Jae-Hwan;Kim, Wee-Kyong
    • Fire Science and Engineering
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    • v.29 no.4
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    • pp.26-32
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    • 2015
  • Carbon dioxide principally extinguishes fires by smothering, but an acceptable amount of extinguishing agent is needed. To assure the performance of carbon dioxide systems in Korea, computer programs certified by NEMA are being applied in system design. But the design errors can occur because the geometry of a model test facility is not the same as that of the actual fire area. Since the discharge rate tends to vary considerably with the flow pattern in a pipe, an on-site discharge test is necessary to ensure the performance of the system, especially with low pressure carbon dioxide. Technical standards for carbon dioxide systems do not give detailed guidelines for discharge tests at present. Based on comparative analysis of standards and practical tests, this paper suggests a methodology for on-site discharge tests.

Influence of the Nozzle Contraction Angles of Gaseous Extinguishing Systems on Discharge Noise (가스계 소화시스템 노즐 수축각이 방출소음에 미치는 영향)

  • Kim, Yo-Hwan;Yoo, Han-Sol;Hwang, In-Ju;Kim, Youn-Jea
    • Fire Science and Engineering
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    • v.33 no.4
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    • pp.77-82
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    • 2019
  • Fire extinguishing systems are essential equipment in all indoor facilities to address unexpected fire scenarios, and appropriate fire extinguishing agent should be used depending on the place and object to protect. Among these, gaseous fire-extinguishing systems are used to protect electronic equipment. Therefore, inert gases that do not undergo chemical reactions are used mainly in those systems. On the other hand, recently, owing to the high integration of electronic equipment, there are some cases, in which large noise generated from gaseous systems damage the electronic equipment. In this study, numerical analysis of the discharge noise with various nozzle contraction angles was carried out to improve the gas fire extinguishing system. Numerical analysis was carried out using ANSYS FLUENT ver 18.1. The causes of the noise were elucidated using the swirl distribution. The noise level of the modified model was reduced by approximately 6 dB compared to the reference model, which is similar to the result of a previous study, confirming the validity of the method.

Pilot Application of Fire Barrier Penetration Seal Evaluation in Nuclear Power Plant (원자력발전소 방화벽 관통부 성능평가 시범 적용)

  • Park, Jun-Hyun
    • Fire Science and Engineering
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    • v.20 no.4 s.64
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    • pp.98-104
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    • 2006
  • The Fire Protection Regulatory documents require the fire-resistive rating of fire barrier penetration seals be same as that of fire barriers. Pilot application of penetration seal evaluation for K nuclear plant, built before penetration seal requirements were made, was done. In this evaluation, visual inspection and estimating fire rating by comparing installed configuration with tested configuration of penetration seals, called bounding approach method, were applied. Further improvements for retrofit and maintenance are recommended with penetration seal evaluation results also. The practical use of the methodology adopted in this study and the evaluation result of K nuclear plant will be anticipated for other plant's penetration seal evaluation.

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
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    • v.37 no.8
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    • pp.946-952
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    • 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.

TNT Explosion Demonstration and Computational Fluid Dynamics for Safety Verification of Protection Wall in Hydrogen Refueling Station (수소충전소 방호벽 안전성 검증을 위한 TNT 폭발실증 및 전산유동 해석)

  • Yun-Young Yang;Jae-Geun Jo;Woo-Il Park;Hyon Bin Na
    • Journal of the Korean Institute of Gas
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    • v.27 no.4
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    • pp.102-109
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    • 2023
  • In realizing a hydrogen society, it is important to secure the safety of the hydrogen refueling station, which is the facility where consumers can easily meet hydrogen. The hydrogen refueling station consists of compressed gas facilities that store high-pressure hydrogen, and there is a risk that the high-pressure compressed gas facility will rupture due to a fire explosion due to hydrogen leakage in the facility or the influence of surrounding fires. Accordingly, the Korea Gas Safety Corporation is making every effort to find out risk factors from the installation stage, reflect them in the design, and secure safety through legal inspection. In this study, a TNT explosion demonstration test using a protection wall was conducted to confirm the safety effect of the protection wall installed at the hydrogen refueling station, and the empirical test results were compared and verified using FLACS-CFD, a CFD program. As a result of the empirical test and CFD analysis, it was confirmed that the effect of reducing the explosion over-pressure at the rear end of the protection wall decreased from 50% to up to 90% depending on the location, but the effect decreased when it exceeded a certain distance. The results of the empirical test and computer analysis for verifying the safety of the protection wall will be used in proposals for optimizing the protection wall standards in the future.

Hybrid Foam을 이용한 탱크화재 진압용 포 소화시스템의 개발

  • Kim, Hong;Jung, Ki-Chang;Yeon, Doo-Hee;Ham, Sang-Geun
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 2000.11a
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    • pp.103-108
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    • 2000
  • 현재 국내에 설치되어 사용중인 위험물 저장 탱크는 총 152,370 개로 이중 1만 리터미만의 저장 용량을 가진 탱크가 약 50%를 차지하고 있으며, 화재나 폭발 시 진압의 어려움으로 인하여 막대한 손실을 초래할 우려가 있는 5만 리터 이상의 대형 탱크도 2만개 이상이 된다. 이러한 대형 탱크의 방호를 목적으로 설치된 기존의 포 소화시스템은 기로제로 공기를 이용한 기계 포 소화시스템으로써 설비 구성상 복잡하고 설치비용이 높아 경제적으로 불리하며 화재 진압에 적용된 포가 열적, 물리적 요인들로 인하여 파괴될 때 방출되는 것이 공기이므로 이는 화재를 성장시키는 원인이 되기도 하여 소화성능 면에서도 불리하다(중략)

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Evaluation of the Closed-type Sprinkler Head Activation Time (밀폐형 스프링클러 헤드의 동작시간 평가)

  • Moon-Hak, Jee;Sung-Yull, Hong
    • Fire Science and Engineering
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    • v.18 no.3
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    • pp.1-8
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    • 2004
  • As a predominant active fire suppression method, closed-type sprinkler systems are used for the purpose of fire control and suppression at the nuclear power plants as well as the industrial facilities. It goes without saying that the proper selection of the system guarantees the adequate actuation of the thermal device. Consequently, the appropriate evaluation should be executed for the thermal behavior with the theoretical and empirical approach. For this purpose, the comparison of activation time for the fusible-link type sprinkler head with the simplified fire case and t-square fire growth case was evaluated. At this paper, the comparison output was presented with the tendency of thermal behavior. In addition, we issued some technical comments for the most appropriate equation in case of the estimation of the sprinkler head activation time. We also raised some idea that should be incorporated for the usage of the t-square equation for the realistic application in the field of the performance-base fire protection approach.