Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Fire Science and Engineering
Journal Basic Information
Journal DOI :
Korea Institute of Fire Science and Engineering
Editor in Chief :
Volume & Issues
Volume 23, Issue 6 - Dec 2009
Volume 23, Issue 5 - Oct 2009
Volume 23, Issue 4 - Aug 2009
Volume 23, Issue 3 - Jun 2009
Volume 23, Issue 2 - Apr 2009
Volume 23, Issue 1 - Feb 2009
Selecting the target year
An Investigation Study on the Coefficient of Occupants Density for Performance Evacuation Capacity Computation in Buildings
Seo, Dong-Goo ; Shin, Yi-Chul ; Lee, Jae-Young ; Kwon, Young-Jin ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 1~8
As the rapid and various changing of social aspects, the structures are getting bigger, higher and more complex. The importance of evacuation is on the rise as increased using frequency of multiplex sale facility and it's a high population density. According to the result of a survey with 4 domestic wholesales mart's population density, the maximum was 0.30, 0.46, 0.42, 0.38 人/
in and 0.46 人/
). Considering evacuation dangerousness, the maximum value will be suitable for computation of evacuation capacity and this will be submitted as a basic DATA for computation of evacuation capacity.
A Study on the Assessment of Hazardous Properties of the Oxidizing Solids
Lee, Bong-Woo ; Park, Chul-Woo ; Song, Haak ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 9~16
Chemical products have had an favorable influence on our everyday life, and contributed very much to the development of human culture. According to the rapid change of industry and the development of scientific technique the using chemical products are increasing more and more. Chemical products can have any hazardous property such as flammability or explosiveness. There are occurring many accidents in the international trade due to the different classification and labelling of chemicals produced in various countries. The main purpose of this work is the development of global standard test methods for the chemicals, and the classification and labelling in building block approach by means of the basic technical data. Oxidizing solids, combustible solids, spontaneously combustible materials, water-prohibitive materials, flammable liquids, self-reactive materials and oxidizing liquids have been classification The first Experiment have tested Oxidizing solids of third five. The results have been classified according to the hazard material safety regulation and the UN regulation, and summarized in a data-base.
Prediction of Moisture Migration of Concrete Including Internal Vaporization in Fire
Lee, Tae-Gyu ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 17~23
Moisture evaporates, when concrete is exposed to fire, not only at concrete surface but also at inside the concrete to adjust the equilibrium and transfer properties of moisture. The equilibrium properties of moisture are described by means of water vapor sorption isotherms, which illustrate the hysteretical behavior of materials. In this paper, the prediction method of the moisture distribution inside the concrete members at fire is presented. Finite element method is employed to facilitate the moisture diffusion analysis for any position of member. And the moisture diffusivity model of high strength concrete by high temperature is proposed. To demonstrate the validity of this numerical procedure, the prediction by the proposed algorithm is compared with the test result of other researcher. The proposed algorithm shows a good agreement with the experimental results including the vaporization effect inside the concrete.
Combustion Emission Gas Analysis and Health Hazard Assessment about P. densiflora and Q. variabilis Surface Fuel Beds
Kim, Dong-Hyun ; Kim, Eung-Sik ; Lee, Myung-Bo ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 24~31
Based on fallen leaves of major Korean conifer species 'Pinus densiflora' and major Korean broadleaved species 'Quercus variabilis', this study sought to identify combustion emission gas types and measure their concentration by means of FTIR (Fourier Transform Infrared) spectrometer. As a result, it was found that there were total 13 types of combustion gas detected from fallen leaves of Pinus densiflora and Quercus variabilis, such as carbon monoxide, carbon dioxide, acetic acid, butyl acetate, ethylene, methane, methanol, nitrogen dioxide, ammonia, hydrogen fluoride, sulfur dioxide and hydrogen bromide. Notably, nitrogen monoxide was additionally detected from fallen leaves of Quercus variabilis. It was found that the overall concentration of combustion gas emitted from the fallen leaves of Pinus densiflora was 4.5 times higher than that from fallen leaves of Quercus variabilis. Particularly, it was found that emission concentration of some combustion emission gas types like carbon monoxide, carbon dioxide and butyl acetate exceeded the upper limit of their time-weighted average (TWA, ppm), while the emission concentration of carbon monoxide and carbon dioxide exceeded their short-term exposure limit (STEL, ppm) for both species. Thus, it was found that carbon monoxide and carbon dioxide have higher hazard to health than other gas types, because these two gas types account for higher than 99% of overall gas emission due to combustion of surface fire starting from litter layer in forest.
A Study on Improvement of Professional Fire Investigation Education and Certification System
Ko, Gi-Bong ; Lee, Si-Young ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 32~42
This study aims to analyze operation status of the professional fire investigation education in Korea and derive improvement measures. Study results showed that professional fire investigation educations are conducted mainly by public sectors (Fire Service, Police, Korea Electrical Safety Corp, Korea Gas Safety Corp, etc.) and the educations conducted by National Fire Service Academy are most systematic. In addition, there was no professional fire investigation educations conducted for private sector (fire accident suffers, common peoples, etc.) In order to improve the problems, this study suggests changing the National Fire Service Academy to lifelong education system in coordinance with the scholar's courses of universities, classifying the fire inspector qualification course (executed by National Emergency Management Agency) in five stages, and opening the fire inspector qualification test to the public.
A Study on Legalization of Seperate Contracting System for Fire Facility Constructions
Lee, Su-Kyung ; Lee, Sung-Kyu ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 43~49
The ultimate objective of research thesis is to introduce the 'Separate Contracting' system of fire facility construction, develop fire industries and stabilize citizen lives. And, this thesis is designed to analyze the ongoing situations of the 'Separate Contracting' system in national and international public constructions, and initiate the methods of introducing the 'Separate Contracting system' in fire facility constructions proper for Korean situations. In this regard, the research thesis studied of the property of the introduction of the 'Separate Contracting' system of fire facility constructions, through the comparative analysis on the existing 'Contract Bundling' system. And, the thesis established strategies to legalize this system and considered the revisions on the laws and items pursuant to fire facility constructions.
An Analytical Evaluation of Fire and Explosion Characteristics of Ethylene
Ha, Dong-Myeong ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 50~56
Explosion limit and autoignition temperature are the major properties used to determine the fire and explosion hazards of the flammable substances. Explosion limit and autoignition temperature for safe handling of ethylene were investigated. By using the literatures data, the lower and upper explosion limits of ethylene recommended 2.6vol% and 36vol%, respectively. Also autoignition temperatures of ethylene with ignition sources recommended
at the electrically heated crucible furnace (the whole surface heating) and recommended about
in the local hot surface. The new equations for predicting the temperature dependence and the pressure dependence of the lower explosion limits for ethylene are proposed. The values calculated by the proposed equations were a good agreement with the literature data.
The Real Scale Fire Test for Fire Safety in Apartment Housing
Yoo, Yong-Ho ; Kweon, Oh-Sang ; Kim, Heung-Youl ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 57~65
This study was intended to conduct a Real-scale fire test to predict the fire behavior by unit space at the apartment building where a huge casualties and injuries are likely. After setting the inflammables inside the house, the test aimed to identify the fire characteristics to each unit item was carried out. The house was divided into 4 unit space such as kitchen, living room, bedroom and a study for a real scale fire test. As a result, bedroom reached to flashover state in 5minutes after setting the fire, indicating a rapid fire growth such as 7433.3kW of maximum thermal emissivity, 578.6ppm of carbon monoxide, 1.25ppm of carbon dioxide and
of maximum indoor temperature. Particularly, the fire growth was made up to critical temperature which might cause a severe damage to the people within 3minutes, if the fire were not extinguished at inflammable space at the early stage of fire, which stressed the need of early response. The result of a real scale fire test could be compared with the outcome of expanded simulation test and used in predicting the fire spread at the space for different use.
A Study on the Flame Retardant Performance and Toxicity of the Painting Wood Painted with Flame Retardant Solution
Kim, In-Beom ; Hyun, Seong-Ho ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 66~71
In this study, I evaluated toxicity that analyze performance of flame-retardant about flame-retardant painting wood and combustion gas that is based on the toxicity index. Processing condition of flame retardant solution and treatment method of samples didn't affect greatly to performance of flame retardant. Occurrence of combustion gas showed a almost similar result from the sample which spraying flame retardant solution and toxicity corresponds to high level, Hazard Class III, and the flame retardant solution saturation sample which makes put out Hazard Class II which is a low toxicity relatively.
A Study on the Fire Risk Assessment and Prevention in the Recycling Process of Used Refrigerators
Lee, Su-Kyung ; Song, Dong-Woo ; Bae, Jeong-Ae ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 72~77
In the recycling procedure of the refrigerator, the fire frequently breaks out. In this study, to clarify the exact cause of the fire, the components and concentration of the materials produced in the process are analysed as well as the problems in the process system, and the protective measure to prevent the fire and the explosion fundamentally is proposed. In this procedure, the preventive measures of fire by removing the combustible materials such as polyurethane and inflammable gases, by removing the ignition sources and by reducing the oxygen concentration to the minimum are proposed along with the protective measures to reduce the damage in the fire. In the crushing procedure where the fire or explosion can break out in diverse ways, the forced ventilation or exhaust system applied to the small partial ventilation facility are installed to reduce the concentration of inflammable gas mixture to lower than the inflammable limit by injecting and exhausting the air forcibly.
A Study on the Flame Resistance Performance and Smoking Characteristics of the Flame-Resistant Paint
Kim, Hwang-Jin ; Lee, Sung-Eun ; Oh, Kyu-Hyung ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 78~83
17 kinds of fire resistant paint which are currently used were painted on the MDF, to find flame resistance performance and smoking characteristics according to principal ingredient and characteristics of fire resistant paint. 45 degree combustion test and smoke density test were conducted to investigate the flame resistance performance and smoking characteristics. According to the 45 degree combustion test, acrylic resin type fire resistant paint showed the most excellent fire resistance performance. And the water soluble fire resistant paint showed better fire resistance performance compare to the solvent soluble paints. Also gloss paint showed better fire resistance performance than the flat paint. Based on the smoke density test, the smoke generation of fire resistant treated specimen of acrylic resin type was least. And the water soluble fire resistant paint generate little smoke than solvent soluble fire resistant paint.
Optimum Fire Extinguishing Modeling using Impact Factor Analysis on Water Mist System of Pool Fire
Hwang, Won-Jun ; Kim, Hwang-Jin ; Lee, Sung-Eun ; Kim, Sung-Won ; Oh, Kyu-Hyung ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 84~89
In this study, the fire extinguishing experiment was performed using a water mist nozzle with variation of factors which affect on the extinguishing time. The variables were distance from nozzle center to fire location, droplet size, height of nozzle and opening or not. With the experimental data, interaction and sensitivity between factors were analysed with Mini tab and deduce a optimum model of fire extinguishing of water mist system. Based on the experiment and modeling of fire extinguishing with water mist system, the most important factor on extinguishing time is the distance from the center of nozzle to fire and the opening effect was small compare with other factors.
Semi-numerical Study on the Flame Tilt Equation due to Wind on the Surface Fire in Forest Fire
Kim, Dong-Hyun ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 90~95
The wind is very important factor in forest fire spread. Flame spread has a change through wind pattern change in forest fire. In order to analyze the forest fire flame spread rate, change of flame tilt depending on wind may be considering first. This is be cause the flame spread rate varies by the flame tilt changed due to transfer of heat. Especially, as wind speed grow, flame gets closer to surface, heat transfer ratio increase, virgin fuel bed reaches ignition temperature more rapidly, and flame moves faster. This study deduces, through experiment and physical figure analysis, relations on the change behavior of flame tilt due to wind. The value of flame tilt angle calculated from the equation and the experiment value showed average error angle of
, which is relatively smaller than results of previous studies that used other coefficient. Froude number coefficient A can be calculated in the method provided in this research for estimation of flame tilt angle of virgin fuel bed with varying thermal properties. The research finding is expected to be applied to future studies on flame spread through numerical analysis of heat transfer.
Forest Fire Direction and Spread Characteristics by Field Investigations
Lee, Byung-Do ; Koo, Kyo-Sang ; Lee, Myung-Bo ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 96~102
Forest fire ignition and spread characteristics are needed as basic data in fire management. Slope aspect of ignition point, spread direction, and wind direction at that time were analyzed and regression equations were proposed for predicting burned area, fire perimeter, head spread rate, and flank spread rate using combustion time using 101 forest fires broken out between 2007 and 2009 spring. 57% forest fires of investigated numbers were ignited in south, southwest, and southeast aspects and 68% of forest fires were spreaded to east, southeast, and northeast influenced by westerly wind. About 11.8ha forest was burned and 0.5km fire perimeter increase was predicted per hour. Head and flank spread rate were calculated 0.13km and 0.05km, respectively.
FDS Simulation and Validation on the Under-Ventilated Compartment Fires
Ko, Gwon-Hyun ; Kim, Sung-Chan ; Hamins, A. ; Ryou, Hong-Sun ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 103~109
In this study, fire simulations on the under-ventilated compartment fires have been conducted using the Fire Dynamics Simulator (FDS Ver. 5.2) and its prediction performance on the thermal and combustion chemical characteristics has been discussed. The temperature and chemical species concentrations in the upper layer of methane, heptane, and toluene fires located in a 2/5 scale compartment based on the ISO-9705 standard room are predicted and compared with the previously published experimental data. The results showed that the FDS simulations reproduced well the temperature of the ceiling and the mixture fraction in the upper layer under the well-ventilation conditions. For the under-ventilated fires, which were taken place due to the insufficient oxygen entrainment, the prediction by the FDS significantly under-estimated the production of carbon monoxide and soot compared to the experimental data.
Analysis for Fire Spread through Double Skin Facade System with FDS
Huh, Yoon-Taek ; Park, Chang-Bok ; Sung, June-Shik ; Yoon, Myong-O ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 110~116
This study is related with fire risk assessment for fire and smoke spread of double skin facade system by use of FDS (Fire Dynamics Simulator) which is a computational fluid dynamics (CFD) model of fire-driven fluid flow. For the study, fire scenario is intended to evaluate the impact of a fire spread for glazed office building. The major purpose of this study is to analyze the fire risk depending on the width of between inner skin and outer skin and to present fire prevention method regarding double skin facade system. The result of analysis presents fire spread more vertically as intermediate space becomes narrow. It is anticipated that fire can spread upper 2 stories above the fire floor if intermediate space with not more than 1m width. Therefore, prevention of vertical fire spread is required.
An Experimental Study on the Ventilation Performance to Enhance Removal Efficiency of Indoor Hamful Gases
Ku, Jae-Hyun ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 117~124
The objective of this research is to analyze the ventilation performance of mechanical ventilation systems to enhance removal efficiency of indoor hamful gases. The ventilation performance is evaluated using a step-down method based on ASTM Standard E741-83. The ventilation performance is evaluated as a function of the ventilation rate and supply/extract locations using a tracer gas (
) technique. As a result, the
concentration as a function of time is decayed exponentially and the ventilation performance is found to increase with increased the ventilation rate. The ventilation performance of the second type ventilation system is better than that of the first type or the third type. The ventilation performance without human occupancy increases up to 55% and the ventilation performance with one person increases up to 25% at the supply air of 570Lpm comparing with a natural reduction after one hour in the test chamber. The ventilation performance is better than 15% comparing with natural decay at the supply of 570Lpm in an office room.
A study on the Development of Smoke Detector Sensitivity Test Equipment
Kim, Hyeong-Gweon ; Kwon, Seong-Pil ; Yoon, Hun-Ju ; SaKong, Seong-Ho ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 125~132
In this study we could contribute to the development of a precise checking tool with which the reliability of the automatic fire detection systems was enhanced and the safety of the people was ensured. In the same way as the domestic technical standard, the portable smoke sensitivity tester, which was developed in this work, could be used to check the capability of the smoke detectors installed in the field. Its heater inside was warmed up to
in 40 seconds and the paper as a smoke source was burned to produce smoke for the test. With the Photoelectric smoke detector it was possible to measure and control the smoke concentration in a range from 0%/m to 25%/m. With the adjustment of rpm of the fan, it was possible to keep a constant wind velocity in a range from 20cm/sec to 40cm/sec.
Numerical Study on Propylene Vertical Wall Fires
Park, Woe-Chul ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 133~137
The Fire Dynamics Simulator (FDS), a computational fluid dynamics model for fire simulation, was applied to propylene vertical wall fires, to confirm its accuracy in simulation of vertical wall fires. The temperature profiles at the center of the burner obtained for mass loss rates per unit area in the range of
were compared with those of experiment. Comparisons of the heat flux distributions along the vertical centerline on the wall surface were made with the measurements. It was shown that the computed temperature profiles were in good agreement with the experiment. It was also noted that the peak temperature near the wall was underpredicted, the heat flux was too high compared with the measurements, and hence improvements are required for FDS in simulation of the vertical wall fires.
The Active Measure of the Operation of the Volunteer Fire Brigade in Korea
Jeong, Gi-Sung ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 138~142
The system of The Volunteer Fire Brigade is the Civil autonomic one which was set up from The Chosun Dynasty and has been active. Having suffered from several dificulties from Japanese control in the Chosun Dynasty, The Volunteer Fire Brigade was established by the enactment 1958 Fire Law and we have had it up to this time. The Volunteer Fire brigade played an important role in the period of the past Fire fighting personnel and equipment which we did not have. It has carried out the assistance of the Fire extinction, the early extinction of a fire in the rural region, the extinction of the forest fire, and lots of social volunteering actions etc. but, today's Fire fighting system has made the surprising developments, such as the improvement of national economic power, the increase of knowledge about the safety of the people, the openness of The Fire Fighting Department of Korea. I will try to check out the role of The Volunteer Fire Brigade which filled up the lacking part the fire fighting in the past and make the measures which can activate in these days, looking for the new field of the movement.
A Numerical Study on the Stack Effect and the Neutral Plane of a Single Simplified Shaft
Jeon, Heung-Kyun ; Choi, Young-Sang ; Choo, Hong-Lok ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 143~152
The numerical analyses for each single simplified shaft with three type openings were carried out by using computational fluid dynamics model for the calculation of the pressure difference and the location of the neutral plane and the visualization of stack effect. As the height of shaft heighten, the pressure difference of stack effect is much deviated against the theoretical value. For the Type A models shorter than 30 m height of shaft and the Type B models longer than 30m, the simulation results for the location of the neutral plane are well agreed to the theoretical values with 5% less deviations just after the beginning of simulation (t = 10s). For the Type B models longer than 30m with multiple openings, therefore, it is possible to calculate the location of the neutral plane by using a CFD model. The phenomenon of the air flow of stack effect can be easily understood with the visualization of stack effect.
A Study on the Propagation Characteristics of Fire Alarm Sound in Buildings
Baek, Eun-Sun ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 153~160
This study aims to review the propagation characteristics of fire alarm sound in building through computer simulation. In order to achieve this goal, the sound power level of existing three different emergency alarms were measured in an anechoic chamber. Sound power level of alarm bell was 98.6dB and electronic-siren speaker was 95.7dB, and electronic-siren phon was 101.8dB at the voltage of DC 24V in the condition of anechoic chamber. As the results of acoustic simulation, it was shown that sound levels at the corridor of the building were relatively high and even. But, there were large difference in sound level at all the frequency bands between corridor and lecture rooms. This mean that alarm sound couldn't be recognized sometimes in lecture rooms. Through the computer simulation, the propagation characteristics of fire alarm sound could be forecasted and compared due to plans of buildings.
The Measurement and Estimation of the Lower Flash Points for tert-Pentanol + Propionic Acid and p-Xylene + Propionic Acid Systems Using Open-Cup Apparatus
Ha, Dong-Myeong ; Lee, Sung-Jin ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 161~166
The lower flash points for the tert-pentanol + propionic acid and p-xylene + propionic acid systems were measured by Tag open-cup apparatus. The experimental data were compared with the values calculated by the Raoult's law, the van Laar equation and the NRTL equation. The calculated values based on the van Laar and NRTL equations were found to be better than those based on the Raoult's law. It was concluded that the van Laar and NRTL equations were more effective than the Raoult' law at describing the activity coefficients for non-ideal solution such as the tert-pentanol + propionic acid and p-xylene + propionic acid systems. The predictive curve of the flash point prediction model based on the NRTL equation described the experimentally-derived data more effectively than was the case when the prediction model was based upon the van Laar equation.
A Study on Safety and Health of Injured Firefighter: Focusing on Gyeongbuk Province
Bang, Chang-Hoon ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 167~172
The aim of study intends to investigate safety and health of injured firefighter in Gyeongbuk province and to provide the base data for the safety and health of firefighter. The results of the study are as follows. Type of activities when injured are surveyed extinguishing fire (42.5%), EMS (20.0%), rescue (12.5%), driving (10.0%) others (10.0%), education and training (5.0%). The firefighter injuries are treated in hospital (75%), operated surgery (62.5%) and disordered physically (25.0%). It was found that administration financial support (42.5%), development and propagation of teaching material (12.5%), the interest of chief (7.5%) were required for the safety and health of firefighter.
A Study on the Current Status and the Improvement Plan of Human Resource Development in Domestic Fire Industry
Shin, Mi-Young ; Lee, Hae-Pyeong ; Jung, Do-Young ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 173~180
As cities become recently more crowded, various and enlarged, it is required a cutting-edge technology for fire industry. According to this, a transition is attempted from production intensive industry toward knowledge based industry. At this point, in order to develop fire industry into knowledge based high value industry, industry innovation capability is required and it heavily depends on human resource competitiveness. Accordingly, in this study is aimed to look the status of domestic fire industry personnel training by classifying the fire industry manpower by field skill personnel, high technology personnel, and professional research personnel and to suggest problems with personnel training followed by each classification and how to improve them.
Imporovement Plan of Fire Inspection System
Lee, Jong-Young ; Ki, Tae-Geun ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 181~195
Modern constitution obtains its justice by protecting the people's basic legal rights. The constitutional rights can be more than a defensive measure against government power by modern viewpoints. The government has to create an atmosphere which the rights are not violated. The Constitution provides that the government has to make efforts to prevent disaster and protect the people from danger in Clause 34, Art. 6. The government has an obligation to protect the people's basic legal rights of life, health and property from fire damages, and those rights are gathering strength under a socialist state principle as fundamental ideology of modern societies. The present fire inspection system gains a point constitutionally but it still needs to be certified as the most suitable system. This article examines the solution to operate fire inspection system efficiently, given the reality of present system operation. It is necessary to improve the system by integrating the present fire inspection with the self fire inspection. Government needs to re-modification the Fire inspections system for prevent and promote (resolve) the problem which government officer (ex fire fighter) can make a irregularities and corruption as do it oneself.
A Study on the Ignition Characteristics of the Electric Mosquito Repellent Mat
Choi, Jae-Sung ; Choi, Seung-Bok ; Min, Se-Hong ; Choi, Don-Mook ;
Fire Science and Engineering, volume 23, issue 5, 2009, Pages 196~205
Electric mosquito repellent mats can be ignited by damage of cables, partial disconnection, overload. tracking and so on. In this study, we examined the structure of mosquito repellent mat, positive temperature coefficient(PTC) thermistor, used for heating element and phenomenological characteristics of remains, obtained on the scene of fires. After reappearance ignition test of PTC thermistors, we did comparison analysis them. And we could confine that the feature of heating plate and the shape of bursting were same.