• Title/Summary/Keyword: Fire Point

Search Result 631, Processing Time 0.036 seconds

Design and Implementation of the Automatic Fire Extinguishing System Based on the Ignition Point Tracking using the Flame Detecter (화재감지기를 사용한 발화점추적기반의 자동소방시스템 설계 및 구현)

  • Paik, Seung Hyun;Kim, Young Wung;Oh, Se Il;Park, Hong Bae
    • IEMEK Journal of Embedded Systems and Applications
    • /
    • v.8 no.3
    • /
    • pp.155-161
    • /
    • 2013
  • To reduce the personnel and material loss caused by fire, we propose the automatic fire extinguishing system based on the ignition point tracking using the flame detecter. This automatic fire extinguishing system is composed of the flame detecting system and the fire extinguishing system based on the water cannon. We study the method for the ignition point tracking and the automatic fire extinguishing using the water cannon and the flame detecter. The flame detecting system for the early fire detection and the ignition point tracking has to be satisfied the requirement of the detecting range and the flame detection time. So we study the signal process algorithm for an improvement of the flame detecting system.

Measurement of Fire Point and Flash Point for Alcohols Using Tag Open-Cup Apparatus (Tag식 개방계 장치를 이용한 알콜류의 인화점 및 연소점 측정)

  • Ha Dong-Myeong;Lee Sung-Jin;Song Young-Ho
    • Journal of the Korean Society of Safety
    • /
    • v.19 no.4 s.68
    • /
    • pp.69-73
    • /
    • 2004
  • The flash point is one of the most important combustible properties used to determine the potential for the fire and explosion hazards of industrial material and the fire point is the temperature of the flammable liquid at which there will be flaming combustion, sustained 5 seconds in response to the pilot flame. In this study, the flash point and fire point were measured to present raw data of the flammable risk assessment for alcohols, using Tag open-cup apparatus(ASTM D 1310-86). The measured values were compared with the calculated values based on 0.78 times stoichiometric concentration. The values calculated by the proposed equations were in good agreement with the measured values.

A Study on Flash Points and Fire Points of Acids Using Closed Cup and Open-cup Apparatus (밀폐식과 개방식 장치를 이용한 Acid류의 인화점과 연소점에 관한 연구)

  • Ha, Dong-Myeong;Han, Jong-Geun;Lee, Sung-Jin
    • Fire Science and Engineering
    • /
    • v.20 no.3 s.63
    • /
    • pp.29-34
    • /
    • 2006
  • The flash and fire point are the most important combustible properties used to determine the potential for the fire and explosion hazards of flammable material. The flash point is defined as the lowest temperature at which a flammable liquid gives off sufficient vapor to form an ignitable mixture with air near its surface or within a vessel. The fire point is the temperature of the flammable liquid at which there will be flaming combustion, sustained 5 seconds in response to the pilot flame. In this study, the flash points and fire points were measured to present raw data of the flammable risk assessment for acids, using Pensky-Martens Closed Cup(C.C.) apparatus (ASTM-D93) and Tag Open-cup (O.C.) apparatus(ASTM D 1310-86). The measured fire points were compared with the estimated values based on 1.11 times stoichiometric concentration. The values calculated by the proposed equation were in good agreement with measured values.

Experimental Study of flash point determination for Alcohols & Aromatic Compounds. (가연성 액체의 인화점 추정에 관한 실험적 연구)

  • 최세환;김광일
    • Fire Science and Engineering
    • /
    • v.7 no.2
    • /
    • pp.24-28
    • /
    • 1993
  • The flash point for flammable liquids (alcohol, aromatic compounds) were measured by Penskt-Martens's measuring apparatus with closed cup. As a result, it was observed that the flash points had the regular tendency according to the carbon number and the molecular structure. Consequently, the flash point for the alcohols were increased in proportion to the increase of the carbon number and branch number. The differences between the literature and experimental data are 14.6% for the relative error and 3.46$^{\circ}C$ in average for the measuring temperature.

  • PDF

A Study on Determination of Fire Origin by Shadow analysis (화염 그림자 분석을 통한 최초 발화지점 확인에 관한 연구)

  • Lee, Seunghun;Choi, Minki;Choi, Donmook
    • Journal of the Korea Safety Management & Science
    • /
    • v.16 no.3
    • /
    • pp.165-173
    • /
    • 2014
  • This study is about determination of fire origin by using analysis of shadow that was recorded CCTV data at the fire scene. This analysis is based on straight and radiate nature of light. At fire experiment with about 1m flame, we conformed that 2-dimensional extension line is focused at the bottom of the fire. If the fire is burning at the same level with shadow, it indicate the point of origin exactly. In 3-dimensional analysis that connect extensional line between distinctive points the shadow and the objet, the line focused in the ${\emptyset}$ 50cm-circle. We estimate the reason of that is because of the character of combustion of gases. The line indicate not the point of origin but the flame that is over the point of origin. thus, you have to consider the line indicate the flame when you do 3-dimensional analysis.

A Study on Railway Vehicles Fire Detection using HMI Touch Screen (HMI 터치스크린을 이용한 철도차량용 복합화재수신기 개발 연구)

  • Park, In-Deok;Kim, Chang
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.30 no.1
    • /
    • pp.38-43
    • /
    • 2016
  • Recent social needs for promoting traffic safety increased and the demand social security in economic, increasing the demand for environmentally friendly rail transport. In particular, when train express such as to secure reliability KTX(Korea Train eXpress) from potential disaster(fire) in the train operation caused by the train express running has been very important. Railroad fire extinguishing system is operated to fire exploding before reaching the flashing point more important than early to quickly detect because of CAN(Controller Area Network) communication to fire suppression and fire receiver, interface, fire fighting equipment from HMI((Human Machine Interface) and fire high-performance to research and development for intelligent composite fire receiver is required.

A Study on the Fire Hazard of Transportation Oil (수송기관용 오일의 화재위험성에 관한 연구)

  • Park, Young Ju;Hwang, Me Jung;Lee, Hae Pyeong;Lee, Seung Chul;Lee, Chang Hyun
    • Journal of the Korean Society of Safety
    • /
    • v.29 no.3
    • /
    • pp.114-120
    • /
    • 2014
  • The purpose of this study is to conduct the study of the combustion and thermal characteristics through transportation oil for the analysis of fire hazard. Transportation oil breaks down into fuels such as diesel for civilian demands, gasoline, DF1(diesel for military), high sulfur diesel(for marine), kerosene and JP1(for aviation), and lubricants like brake fluid, power steering oil, engine oil, and automatic and manual transmission oil. The experiments of flash point, ignition point, flame duration time, heat release rate were carried out using TAG closed cup flash point tester(AFP761), Cleveland open cup auto flash point analyzer(AFP762), KRS-RG-9000 and Dual cone calorimeter. As a result, the fuel's ignition points were lower than lubricants, especially that of gasoline was not conducted as it has below zero one. Gasoline has the highest ignition point of about $600^{\circ}C$, while the other fuels showed $400{\sim}465^{\circ}C$. For flame duration time, lubricants had over 300 seconds, but fuels had less than 300 seconds except high sulfur diesel(350 seconds). Total heat release rate ranged $287{\sim}462kW/m^2$ for lubricants and gasoline showed the highest total heat release rate, $652kW/m^2$.

Prediction and Measurement of Flash Point and Fire Point of Aromatic Hydrocarbons (방향족탄화수소의 인화점과 연소점 측정 및 예측)

  • Ha Dong-Myeong;Han Jong-Geun
    • Journal of the Korean Institute of Gas
    • /
    • v.9 no.3 s.28
    • /
    • pp.21-26
    • /
    • 2005
  • The flash points and the fire points are one of the most important combustible properties used to determine the potential for the fire and explosion hazards of flammable substances. In this study, the flash points of aromatic hydrocarbons, were measured by using Pensky-Martens Closed Cup apparatus(ASTM-D93) and Tag Open-Cup apparatus(ASTM D 1310-86). Also the fire points of aromatic hydrocarbons, were measured by using Tag Open-Cup apparatus. The measured flash points were in good agreement with reference values. The measured fire points compared with the estimated values based on 1.23 times stoichiometric concentration. The values calculated by the proposed equation were in agreement with measured values.

  • PDF

Studies on Plywood Treated Fire-Retardant - III. The Fire-Retardant Degree of Monoammonium Phosphate Treated Plywood (합판(合板)의 내화처리(耐火處理)에 관(關)한 연구(硏究) - III. 제1인산(第一燐酸)암모늄처리합판(處理合板)의 내화도(耐火度))

  • Kim, Jong-Man
    • Journal of the Korean Wood Science and Technology
    • /
    • v.14 no.4
    • /
    • pp.21-28
    • /
    • 1986
  • Plywood used for construction as a decorative inner material is inflammable and can fire accident, causing destruction of human life and property. In this study, 3.5mm Kapur plywoods were soaked in the 23% monoammonium phosphate solutions by cold soaking method 3, 6, 9hrs and hot-cold bath method for 3/3hrs, and redrying was carried out by press-drying at the platen temperature of 110, 130, 160, 180$^{\circ}C$, and then fire test was carried out to investigate burning point, flame exhausted length, frame spread length, back side carbonized area and weight loss. The results are as follows; 1. In cold soaking method for 3, 6, 9hrs. retentions of monoammonium phosphate were 0.377, 0.448, 0.498kg/(30cm)$^3$ respectively, and in hot-cold bath method for 3/3hrs, the retention was 1.331kg(30cm)$^3$ that exceeded the minimum retention 1.124kg/(30cm)$^3$. 2. Correlation coefficients among the variable were shown in table 2. From the table, it could be recognized that there were close negative correlations between the treatment and burning point, flame spread length, back side carbonized area, flame exhausted time and weight loss, and there was negative correlation between treating time and back side carbonized area, but there was positive correlation between platen temperature and burning point. 3. From table 3, it can be observed that there were highly significant differences for burning point, flame spread length, flame exhausted time, back side carhonized area, weight loss between treatments. And in 2-way interactions, there were also highly significant for burning point, flame spread length, flame exhausted time, weight loss between time x treatment. 4. It was observed that burning point, flame exhausted time, flame spread length, back side carbonized area, and weight loss in fire-retardant treated plywood were the best effects in fire-retardant treated plywood, water treated plywood and nontreated plywood. In conclusion, I can estimate that absorbed chemical contents by hot-cold bath method for 3/3hrs, have a lot of effects on fire-retardant factors such as burning point, flame spread length, flame exhausted time, backside carbonized area and weight loss, but platen temperatures have a little effects on the fire factors.

  • PDF

The Measurement of Fire and Explosion Properties of n-Pentadecane (노말펜타데칸의 화재 및 폭발 특성치의 측정)

  • Ha, Dong-Myeong
    • Journal of the Korean Society of Safety
    • /
    • v.28 no.4
    • /
    • pp.53-57
    • /
    • 2013
  • For the safe handling of n-pentadecane, the lower flash points and the upper flash point, fire point, AITs(auto-ignition temperatures) by ignition delay time were experimented. Also lower and upper explosion limits by using measured the lower and upper flash points for n-pentadecane were calculated. The lower flash points of n-pentadecane by using closed-cup tester were measured $118^{\circ}C$ and $122^{\circ}C$. The lower flash points and fire point of n-pentadecane by using open cup tester were measured $126^{\circ}C$ and $127^{\circ}C$, respectively. This study measured relationship between the AITs and the ignition delay times by using ASTM E659 apparatus for n-pentadecane. The experimental AIT of n-pentadecane was $195^{\circ}C$. The calculated lower and upper explosion limit by using measured lower $118^{\circ}C$ and upper flash point $174^{\circ}C$ for n-pentadecane were 0.54 Vol.% and 6.40 Vol.%.