• Title/Summary/Keyword: 소화설비

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An Application of the Water Mist System for Underground Utility Tunnel (지하구 미분무수 소화설비 적용에 관한 연구)

  • 김운형;김종훈;박승민;김태수;민인홍;전동일;김상욱
    • Fire Science and Engineering
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    • v.16 no.1
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    • pp.66-76
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    • 2002
  • This paper includes new nozzle design, basic design factors of water mist system that minimize a thermal damage of cable causing business interruption and applying underground utility tunnel. A underground concrete structure (2.5 m(H)$\times$2.5 m(W)$\times$25 m(D)) is constructed in order to test a nozzle performance. Under the designing fire scenario, critical thermal damage of cable sheath ($400^{\circ}c$) reached within a 2 minutes with unsuppressed fire, but type 1 nozzle (SMD 470 $\mu{m}$) and type 2 nozzle (SMD 650 $\mu{m}$) control cable temperature below $400^{\circ}c$. A system performance and fundamental design factors; K factor, flow rate, spray angle, size distribution, nozzle pressure, spray density are analyzed and proposed for system optimization.

Evaluation on Fire Spread Speed of Standard Rack in Korea for Performance based Fire Extinguishing System (성능위주 소화설비 적용을 위한 표준랙크의 화재확산속도 평가)

  • Cho, Gyu-Hwan;Yeo, In-Hwan
    • Fire Science and Engineering
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    • v.30 no.6
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    • pp.84-91
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    • 2016
  • In case of fire, vertically and intensively loaded rack warehouses are faced with a severe status due to the rapid increase in fires. In this regard, there have been trials to prevent fires from spreading by applying fire extinguishing systems, such as ESFR and In-Rack Sprinklers, vertical and horizontal barriers, etc.; however, it is difficult to calculate and design proper fire extinguishing systems caused by various composition conditions, such as the size and loading density of the rack, types of loading commodities, etc. Therefore, in this study, a standard rack was manufactured, incorporating a rack warehouse in Korea by site investigations, surveys, etc. In addition, a full scale fire test was executed to check the fire characteristics depending on the conditions of the ignition points. As a result, the extracted fire spread speed is expected to be utilized as a reference for performance comparisons of the fire extinguishing systems to be developed and applied in the future.

A study on the Fire Extinguishing performance test of Water-Based Fire Protection System on Wooden cultural property (목조문화재에 대한 수계소화설비의 소화성능 실험 연구)

  • Kim, Hyun-Ju;Roh, Sam-Kew;Ham, Eun-Gu;Kim, Dong-Cheol;Kim, Kyung-Sik
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • pp.179-182
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    • 2011
  • 본 연구는 목조 건축물의 규모(높이)에 따른 수계 소화설비의 화재 진압 성능을 비교하여 최적의 소화설비를 선택함을 목적으로 한다. 높이 2.5m(소), 4m(중), 5.5m(대)의 모형화재실을 제작하고 모형화재실 천장에 스프링클러헤드와 미분무헤드를 설치, 소화실험을 진행하여 천장부 온도변화 및 소화시간, 방수량을 측정한다.

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A Study on the Firefighting Equipment in Petrochemical Plants (석유화학공장의 소화설비에 관한 연구)

  • Kim, Bong-Hoon;Choi, Jae-Wook;Lim, Woo-Sub
    • Fire Science and Engineering
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    • v.28 no.5
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    • pp.14-22
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    • 2014
  • Hydrocarbon fires and explosions in petrochemical plants have occurred repeatedly every year. But domestic law of fire protection system is insufficient for the worst case scenario. In this study, we analyzed domestic and foreign standards of fire protection system in petrochemical plants and surveyed firefighting equipment of 32 petrochemical plants in ulsan petrochemical complex. Finally, it is necessary to design fire water supply based on the worst case scenario in petrochemical plants and firefighting equipment such as fixed water spray system, elevated monitor nozzle, water curtain, large amount foam monitor system should be installed for the worst case scenario in petrochemical plants.

Development of Loaded Stream Fire Extinguishing Systems for Underground Transmission Cables (지중송전선로 접속부용 미분무 강화액 소화설비의 개발연구)

  • Lee, Sung-Mo
    • Fire Science and Engineering
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    • v.22 no.1
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    • pp.93-98
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    • 2008
  • Full-scale fire extinguishment tests were conducted to develop loaded stream fire extinguishing systems for protecting underground transmission cables. The dimension of test mock-up was 5.5m height${\times}3m$ width ${\times}6m$ length, and six 154kV OF cables were piled up. Gasoline was used to ignite cates. Linear heat detection cables were installed on top of 154 kV OF cable and discharge nozzles were installed on the top and sidewalls, respectively. As a result, both surface fires and deap-seated fires were extinguished successfully within the specified 3 minutes by discharging loaded stream agent.

A Study on the Direct Discharge Test for Verifying Design Concentration and Soaking Time for CO2 Fire Extinguishing System of Total Flooding (전역방출방식 CO2 소화설비의 설계농도 및 유지시간 검증을 위한 직접방사실험에 관한 연구)

  • Lee, Se-Myeoung;Moon, Sung-Woong;Ryu, Sang-Hoon
    • Fire Science and Engineering
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    • v.26 no.6
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    • pp.15-23
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    • 2012
  • Indirect Test Method is often used instead of direct test method in test method for extinguishing performance of $CO_2$ extinguishing facility because of high cost, environment problems and difficulties of procedure. But in the danger facilities for a unit of nation, such as a petrochemical plant, a nuclear power plant, or etc. is better to verify the performance of the extinguishment through direct discharge test. In $CO_2$ extinguishing system for total flooding system installed in dangerous facilities in Korea, each protected area in surface fire and deep-seated fire had selected and verified of extinguishing performance of $CO_2$ extinguishing facilities. To get recognized as extinguishing performance, discharged $CO_2$ concentration to protected area should be equivalence with design concentration standards (NFSC and NFPA). The Design Concentration means that $CO_2$ extinguishing agent is considerate of concentration for percentage of allowance (20 %) from extinguishing concentration which available to control of flame. As test result, surface fire and deep seated fire in protected area is obtained $CO_2$ design concentration and maintained design concentration more than 20 minutes as deep-seated fire. Through this study, we introduced direct discharging test method and decision method. And furthermore, especially in the dangerous facilities as a unit of Nation, we suggested necessity about reliability of extinguishing facilities to use direct test method.

A Study on Damage Effects Assessment for Asphyxiation Accident due to Malfunction of Gas Type Fire Extinguishing System (가스계 소화설비 오작동으로 인한 질식사고의 피해영향 평가)

  • Kim, Eui-Soo
    • Journal of the Korean Institute of Gas
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    • v.24 no.2
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    • pp.36-43
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    • 2020
  • Gas system fire extinguishing equipment is a very economically useful facility, but if it is not used for a long period of time after installing the equipment, there is possibility of rupture due to corrosion of containers and operation errors of equipment systems, and this is very dangerous. However, it is impossible to experiment to check whether the equipment is operating normally. If gas is temporarily released into the enclosed space due to rupture and malfunction, it can cause serious human damage due to gas suffocation. In this study, based on the suffocation death accident of gas system fire extinguishing facility, the inflow path of released gas and the possibility of death and time to death were estimated using a 3D scan and FLACS.

A Study on the Application of Fire Protection Facilities in Large Enclosure Gymnasium (대규모 실내경기장의 소방방재설비 적용현황 분석)

  • Choi, Dong-Ho;Kim, Choon-Dong;Yang, Jeong-Hoon;Cho, Young-Hum
    • Journal of Korean Association for Spatial Structures
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    • v.10 no.2
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    • pp.135-145
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    • 2010
  • The objective of this study is to draw basic data for the application of the fire protection planning for the future plan large enclosure buildings in Korea through an analysis of its characteristics by case studies of the domestic and foreign large scale gymnasiums. In this study, domestic building codes for the fire protection are investigated and fire detection systems, fire extinguishing systems, smoke control systems and evacuation systems of three large scale gymnasiums located at Korea and eight foreign countries are compared and analyzed. The results of this study show that infrared light fire detection system and flame detector for spacial characteristics are potentially used in fire protection systems of large scale gymnasiums: dry type sprinkler and sprinkler water gun are adopted in fire detection system; and smoke accumulation system is widely utilized in smoke control system.

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