Earticle

In this Research, the real scale model (Each diameter 50cm, 100cm, vertical size 65cm) was constructed in order to determine the oil steam explosion hazard due to the high temperature heating element. Steam generated from the diesel fuel ignition characteristics for high temperature heating element, experiments were conducted 142 times. Thermocouple to used the research was measured by “k-type.” “50cm set” of experimental results at the time of explosion, it took 82.8 seconds The temperature of the heating element was 334.8℃. the other “100cm set” of explosion Time spent is 108 second. Temperature was 620℃. Diesel heater, rods and the spacing of the explosion nears, Was started at a lower temperature. If you increase the amount of oil by the explosion occurred when the pressure wave occurs while the oil steam is increased on diesel Thus give rise to a large explosion. Higher the temperature of the higher upper rather than the higher lower diesel is explosion, it amount in 0.07g between 0.00045g The vapor arising from the experiments set was 10.8 (kg/m3). Experiments in the pressure due to temperature changes As the room temperature rises, the increased internal air pressure. This occurred on the surface of the vapor of the impact of vigorous exercise is considered.

This study in 2011, 03. Factors, and classify the major aspects of fire and fire-related happening in a limited space, and objective consideration of the phenomenon on the basis of the situation of fires and casualties 17 02:07 around in an apartment in Gyeongnam Tongyeong, misudong 〇〇 apartment fire in the cause of the accident casualties want to take advantage of the material that may be helpful to minimize. Reproduce interpreted in Goseong - maammyeon samrakri considering to take advantage of the program, FDS fire simulation model developed by the U.S. National Institute of Standards and Technology (NIST) in the event of an actual fire apartment Chemical (real fire) digestion conducted at the test site reproduce experimental research and analysis on the apartment-fire-related phenomena, and the actual apartment fire in rare cases when, in any way, be sure to study the fire fighting and rescue. Of these apartments in the number of fire and damage caused by fire, compared to other places, as well as quite a few do not, especially the number of victims continues to increase, and very high fire risk, are appearing. Case Studies and an apartment fire caused by oxygen deficiency within Backdraft phenomenon that occurs several apartment fire hazard than any firefighting objects nopeunde despite the lack of awareness about the dangers in the domestic shown because the current institutional deficiencies, such as improvement is considered to be helpful to secure the stability of the residential space from a major disaster and fire.

본 연구에서는 실제 주방과 유사한 실험세트에서 각종 동식물성 유지류의 다양한 조건에 따른 실험을 전개하여 발화 특성을 파악하였으며, 냉동식품 투입실험, 물 소화실험, 마네킹 활용실험으로 식용유 과열시 수분 투입에 의해 발생하는 Slop Over 현상의 메커니즘 및 위험성을 연구하였다. 실제규모 주방화재 재현실험을 실시한 후, 유지 잔류물에서 시료를 채취하여 전문장비를 활용한 성분분석으로 화학적 패턴을 식별하여 발화와 관련된 주요 특징을 도출하였으며, 재현실험 으로 소훼된 현장의 연소형상을 분석하고 잔류물에서 주요 특징을 식별하여 원인을 입증할 수 있는 조사기법을 도출하였 다. 또한 FDS를 이용한 유지류 주방화재 시뮬레이션 수행으로 화염전파 과정, 방향성, 연소패턴 등을 상호 비교하여 화재 감식 기초 자료로서의 적합성을 분석하였다.

Microwaves are common and necessary electric home appliances. Infrequency of use and short duration cooking times contribute to this appliance having a very low igniting potential. However, if the combustion conditions are met and there are sufficient neighboring combustibles, there is potential for fire. This review is conducted on the igniting potential of microwaves under several conditions and to understand how the structure and principles of microwaves contribute to this igniting potential. By understanding the principles of microwaves, the exact igniting causes can be investigated. Through experimentation, information is gained about the igniting possibilities of carelessness and electrical factors. A proper investigation can glean important information and can ultimately be reflected in more effective fire protection policies.

The purpose of this study is to identify the relations between the venting and combustibles which are typical three materials, such as the wood, plastic, sofa, and to check the way how to use it in the determination of origin. We carry out two kinds of experiments, which is the effects of venting in the fire growth of combustibles, and which is the fire patterns of materials, such as Char Blister and melted Plastic etc, in the confining structures. The results of this study are as follows. The intensity and weakness of combustion varies widely with the initial conditions of fire, such as the entrance of air etc, and the property of flammable materials. Thereby, referenced with the patterns of fire through the experiments, this literature suggests that the investigator should note the size of venting, the property and arrangements of combustibles, the finishing materials of wall and ceiling, and the temporary and imaginary compartment of the first ignition room, which are divided in the four region for the correct documentation of ignition material and determination of origin.

본 논문에서는 2012년 8월 13일 11시 23분경 발생한 서울시 종로구 소재의 국립현대미술관 서울관 신축공사장 화재사 고에 대해 실물화재실험과 시뮬레이션을 이용해 분석하고, 시사점에 따른 대책을 제시하였다. 화재는 지하3층 기계실 천 장에 설치된 가설전등에서 전기적 요인으로 발생하였으며, 실험결과 직접적 원인은 전등 보양에 의한 열 축적으로 전선 피복이 손상되어 단락 된 것으로 추정된다. 우레탄폼은 전기스파크와 같은 작은 불티는 쉽게 착화되지 않으며 중간 연소 매개체가 있어야 우레탄폼을 발화시킬 수 있다. 발화 후 초기 연소는 완만하나 일정시간 경과하면 열과 연기유동이 급격 히 확산되고, 시뮬레이션 결과 연소 약 4.5m/s로 빠르게 확산되었다. 우레탄폼은 다공성 가연물로 밀도가 낮아 열분해에 의한 가연성 가스가 다량으로 분출되고, 이 과정에서 많은 연기가 발생하며 언론에서 보도된 포스겐 가스는 발생하지 않 는 것으로 확인되며 사망자의 주된 요인은 불완전연소 가스(CO)에 질식한 것으로 추정된다.

현대 사회에서 전기에너지는 필수불가결한 중요한 에너지원이다. 조명에서 소비하는 전력이 총 소비전력의 20%를 차 지하고 있으며, 조명설비가 많이 사용되는 만큼 이와 비례하여 화재사고도 점차 증가하는 추세이다. 2011년에 화재는 15,712건으로 이중 조명기기류에서는 1,048건으로 6.6%를 차지하고 있으며 특히 형광등기구류에서는 440건으로 전체 화 재 중 2.8%를 차지하고 있다. 본 연구에서는 형광등 구조와 원리를 이해하고 일반가정에서 가장 많이 사용되고 있는 콤팩 트형 형광램프에서 발생하는 화재원인을 실험을 통해 살펴보고, 램프 안전기준 개정 등 그 예방대책에 대해 논하고자 한다.

담뱃불 발화에 영향을 미치는 요인 중 하나인 건조도(담배꽁초)와 풍속에 대한 연구를 하여 이것이 발화에 어떠한 영 향을 주는지 분석하였으며, 인명피해가 발생한 화재사례를 재구성한 재연실험, 화재시뮬레이션을 통한 연소패턴, 피난허 용시간 산출, 그리고 ISO 9705 표준단위실험을 통한 내부 연소가스 측정으로 인명피해가 발생한 원인을 분석하는 등 실 증적인 실험을 통해 담배꽁초와 화재의 연관성을 연구하였다.

The fire case determined by flooring is lastly carbureted by heat flow. After the fire, the continuity of inflammable material and that trait of flooring which is made by an opening could make up the carburetion. So the fire investigator may have made a fault. therefore I would analyze the heat flow by using FDS and compare the combustion experiment and the real case of fire so that I will check out how the heat flow could affect the fire cafe determined by flooring. I would check out the scientific ground. by doing that, I suggest the fire be investigate like below. therefore I would secure the public confidence about the fire investigation.

Recently, there are many fire accidents by dust explosion and denotation. Year by year, the number of fire accidents by dust explosion and denotation is steeply increasing. In last year, at Asan province, there was a dust-caused big fire at factory which manufactures Korea traditional medicine powder. From this motivation, we research about dust explosion and denotation. In this report, We did several experiments to clarify and confirm the explosion conditions and analyzed fire accidents data statistically, then from this results, we suggested dust explosion-prevention methods for potential fire accidents