• Title/Summary/Keyword: Fire engine

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Study for Fire Examples of LPG Leakage Including Fuel hose, Injector and Pressure Regulator Connector in Vehicle (자동차 연료호스, 인젝터 및 압력조절기 연결부에서 LP 가스 누출에 의한 화재사례 고찰)

  • Lee, Il Kwon;Kook, Chang Hoo;Suh, Moon Won;Jung, Dong Hwa
    • Journal of the Korean Institute of Gas
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    • v.17 no.3
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    • pp.8-13
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    • 2013
  • The purpose of this paper is to study for fire example by fuel leakage in LPG Vehicle. At first example, the car was repaired the fuel line that was connected with pressure hose between fuel regulator and injector in engine. But the service man was not very tighten with regular torque. At a result, the gas leaked on hot parts of engine. It verified the production of fire by engine heat. At second example, when the repair man, after replacement the injector, inserted the injector in a assembling part of it, he didn't the transform condition of fixing part. Therefore, the tearing phenomenon of O ring producted the controlled leakage of fuel by the injector deflection. It found the fact that the fuel leaked with gap of O ring. At third example. the fuel-cut solenoid valve was lined with pressure regulator unit. But the service man didn't throughly certify the leaked work of connected parts after repaired it. As a result, it certified the fire by engine heating leaked liquefied petroleum gas. Therefore it have to minimize the fire production that the driver should do no problem to throughly manage the fuel system.

Analysis of Liquid-Propellant Rocket Engine(KL-3) Unstable Combustion Characteristics of Vertical Installation (수직장착에서의 액체추진제 로켓엔진(KL-3) 불안정 연소특성에 관한 연구)

  • 하성업;권오성;이정호;김병훈;한상엽;김영목
    • Journal of the Korean Society of Propulsion Engineers
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    • v.7 no.1
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    • pp.18-27
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    • 2003
  • To perform combined tests with propellant feeding system and engine, which were developed for KSR-III launcher, vertical test stand was organized and a series of hot-fire combustion tests were carried out with engines of several injector faceplate types. In hot-fire tests in vertical installation, combustion instabilities occurred right after ignition with an engine without baffle, and such combustion instabilities did not occur at ignition add during mainstage operation for an engine with STS or composite baffle. 1.regular and temporary pressure pulsations(popping) were detected during steady operation with a baffle engine, however a development to combustion instabilities with resonant mode was highly suppressed by baffle. With a series of tests, it was confirmed that the last developed engine, which has composite baffle, was operated successfully in KSR-III flight propulsion system.

An Experimental Study on Mechanical Ventilation Using an Exhaust Engine in Corridor Fires (복도공간 화재 시 배연차를 활용한 배연에 관한 실험적 연구)

  • Lee, Sung-Ryong;Han, Dong-Hoon
    • Fire Science and Engineering
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    • v.24 no.3
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    • pp.99-105
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    • 2010
  • Ventilation fans utilized correctly can increase the effectiveness of fire fighters and survivability of occupants. It is possible to increase the pressure of a corridor to prevent the infiltration of smoke. In this study, experiments were carried out to evaluate ventilation effectiveness in corridor fires. Corridor used in the experiment was 20 m long. Heptane was used as a fuel. Temperature and visibility were measured in order to evaluate ventilation effectiveness according to the position of a vent. Vent distance ranged from 0 m to 4 m and height varied from 0 m to 1.5 m. When the vent was positioned 2 m long and 0.75 m high the result was most effective.

Research about Improvement Way of Fire Investigation System - Regarding Product Liability Responsibility Law - (화재조사 제도의 개선방안에 관한 연구 - 제조물 책임법과 관련하여 -)

  • Mun, Yong-Soo;Kong, Ha-Sung;Yoon, Myong-O
    • Fire Science and Engineering
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    • v.22 no.5
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    • pp.105-111
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    • 2008
  • Improvement of fire investigation system is required to supplement problem that can happen after product liability law enforcement of our country. This treatise searches special quality of inside and outside of the country fire investigation that was enforced present with theoretical background of manufacture water responsibility law and compared. And is based and grasped objective and hangup in police fire investigation, fire fighting fire investigation, engine fire investigation of private fire judgment. By improvement way accordingly first, proposed fire emotion connection studies and establishment and connoisseurship qualification system establishment etc. in the common people private fire diet, judgment, analysis company's necessity second, fire fighting of fire investigation system, police's member anger third, college.

Development of an Intelligent Program for Diagnosis of Electrical Fire Causes (전기화재 원인진단을 위한 지능형 프로그램 개발)

  • 권동명;홍성호;김두현
    • Journal of the Korean Society of Safety
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    • v.18 no.1
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    • pp.50-55
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    • 2003
  • This paper presents an intelligent computer system, which can easily diagnose electrical fire causes, without the help of human experts of electrical fires diagnosis. For this system, a database is built with facts and rules driven from real electrical fires, and an intellectual database system which even a beginner can diagnose fire causes has been developed, named as an Electrical Fire Causes Diagnosis System : EFCDS. The database system has adopted, as an inference engine, a mixed reasoning approach which is constituted with the rule-based reasoning and the case-based reasoning. The system for a reasoning model was implemented using Delphi 3, one of program development tools, and Paradox is used as a database building tool. To verify effectiveness and performance of this newly developed diagnosis system, several simulated fire examples were tested and the causes of fire examples were detected effectively by this system. Additional researches will be needed to decide the minimal significant level of the solution and the weighting level of important factors.

A Study on the Development of Fire Extinguishing System for Machinery Spaces of a Small craft (무인기관실에 효과적인 자동소화장치개발 관한 연구)

  • Lee, Chan-Jea;Kang, Dae-Sun;Kim, Dong-Suk;Kwark, Ji-Hyun
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2006.06a
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    • pp.127-128
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    • 2006
  • A study developing the dry powder fire extinguishing system inside the simulated machinery spaces of small boats was performed. Fire tests were conducted inside the compartments having volumes 2.9, 4.5, $8m^3$ respectively. The openings and fans were established on the walls of the compartments. Diesel oil was used for the test fuel, In addition fire extinguishing nozzles using dry powder were installed downward at ceiling and horizontally at the wall or conner. All fires in the test were extinguished under system activation and there was no reignition.

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Application of reinforcement learning to fire suppression system of an autonomous ship in irregular waves

  • Lee, Eun-Joo;Ruy, Won-Sun;Seo, Jeonghwa
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.12 no.1
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    • pp.910-917
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    • 2020
  • In fire suppression, continuous delivery of water or foam to the fire source is essential. The present study concerns fire suppression in a ship under sea condition, by introducing reinforcement learning technique to aiming of fire extinguishing nozzle, which works in a ship compartment with six degrees of freedom movement by irregular waves. The physical modeling of the water jet and compartment motion was provided using Unity 3D engine. In the reinforcement learning, the change of the nozzle angle during the scenario was set as the action, while the reward is proportional to the ratio of the water particle delivered to the fire source area. The optimal control of nozzle aiming for continuous delivery of water jet could be derived. Various algorithms of reinforcement learning were tested to select the optimal one, the proximal policy optimization.

Analysis of Flow Characteristics in the Intake System of 6-Cylinder MPI CNG Engine

  • Ha, Seung-Hyun;Kim, Ho-Young;Chung, Jin-Taek
    • 한국연소학회:학술대회논문집
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    • 2002.11a
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    • pp.215-222
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    • 2002
  • It has been well acknowledged that intake system plays great role in the performance of reciprocating engine. Well-designed intake system is expected to not only increase engine efficiency but also decrease engine emission, which is one of the most urgent issues in the automotive society. Thorough understanding of the flow in intake system helps great to design adequate intake system. Even though both experimental and numerical methods are used to study intake flow, numerical analysis is more widely used due to its merits in time and economy. Intake system of In-line 6-Cylinder CNG engine was chosen for the analysis ICEM CFD HEXA was used to create 3-D structured grid and FIRE code was used for the flow analysis in the intake system. Due to the complexity of the geometry standard ${\kappa}-{\varepsilon}$ turbulence model was applied. Numerical analysis was performed for various inlet and outlet boundary conditions under both steady and transient flow. Inlet mass flow rate and outlet pressure variation were changing parameters with respect to engine speed. Flow parameters, such as velocity, pressure and flow distribution, were evaluated to provide adequate data of this intake system.

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A Study on the Analysis and Application of the Fire Simulation Tools for Ships (선박화재 시뮬레이션을 위한 도구 분석과 적용에 관한 연구)

  • Choi, Jin;Lee, Dong-Kon;Park, Beom-Jin
    • Journal of the Society of Naval Architects of Korea
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    • v.44 no.2 s.152
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    • pp.83-92
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    • 2007
  • To improve the fire safety of ships, it is required to prepare the systematic design guideline for fire protection and the way of assessing fire characteristics quantitatively. The introduction of simulation technique based on fire engineering is useful to assess fire safety performance quantitatively. Fire simulation tools are currently developing with U.S.A., Europe and Japan as a leader. Most of current fire simulation tools were developed for building or inland structure. Therefore it is required validation process and development of data base to apply maritime environments. In this paper, I/O parameters of simulation tools such as CFAST and BRI2002 of zone model and FDS and KFX of field model analysed, and designed data base considering maritime environment. The fire simulation for the pool fire model of engine room and its adjacent compartments is performed and evaluated the results.