• Fire Science and Engineering
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• v.16 no.3
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• pp.56-60
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• 2002

Recently, with the growth of software for electro-thermal analysis, it has been studied the precise analysis and investigation of cause for the electrical fire using computer simulation on the basis of theory for electro-thermal analysis. But it is very lacking for the precise analysis and investigation of cause for the electrical fire. In this paper, we have simulated the thermal analysis for electrical wire according to the value of current in a overload and a short with the electrical wire of the L's company product(600 V VVF) using the electro-thermal finite element method(Flux2D).

• Fire Science and Engineering
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• v.16 no.4
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• pp.72-76
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• 2002

Nowaday, with the growth of software for electro-thermal analysis, it has been studied the precise analysis and investigation of cause for the electrical fire using computer simulation on the basis of theory for electro-thermal analysis. But it is very lacking for the precise analysis and investigation of cause for the electrical fire. In this paper, we have simulated the thermal analysis for electrical wire according to the value of current and deteriorating time in a overload and a short with the electrical wire of the L's company product(600 V VVF : Three core) using the elec-tro-thermal finite element method(Flux2D).

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.278-281
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• 2012

사무공간의 화재성상을 예측하기 위해 화재하중 $25kg/m^2$ 값을 적용하여 $2.4(L){\times}3.6(W){\times}2.4(H)\;m$ 크기의 Mock-up 화재실험을 진행하였다. 화재실험은 실물화재실험 장비인 LSC(Large Scale Calorimeter)에서 실시하였으며, 열방출률 및 질량감소율을 측정하였다. 실물화재실험 시작 후 약 1110 초에 플래시오버가 발생하였으며, 최대 열발출률은 1241.1 KW로 측정되었고 질량은 초기 219 kg에서 102 kg로 감소하였다.

• Fire Science and Engineering
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• v.20 no.3 s.63
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• pp.85-95
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• 2006

Because the average span of human life is expanded by developing economy growth and medicine science elder population increases rapidly. According to that A first aid patient of demands grow, too so in a fire station. We have to prepare following these. First that the silver ambulance is in process of service is widely. second, medical teams and fire fighters construct unity Third, New curni culum makes under modern operating course. Forth, the problem that wireless paging system sets up and rums already. advances more effective. Fifth furthermore, we organize a private volunteer for an old age To connect that we enlarge total service for silver age. Through this fire fighting service. we are neloom to get more confidence and love.

• Fire Science and Engineering
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• v.12 no.2
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• pp.17-28
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• 1998

To propose a new fire hazard assessment criteria of interior finish materials, the properties and incident heat flux of interior finish materials in a compartment fires are investigated and compared by using flame spread model developed by Quintiere. The properties considered on which fire growth depend are including flame heat flux and thermal inertia, lateral flame spread parameter, heat of combustion and effective heat flux and thermal inertia, lateral flame spread parameter, heat of combustion and effective heat of gasfication. ISO Room Corner Test(9705) is applied in the model and the time for total energy release rate to reach 1MW is examined. The results are compared for the 24 different materials tested by EUREFIC. Dimensionless parameter a, b and ${\gamma}$b are used to develope a new method in which fire hazard of interior finish materials can be classified resulting from correlation between b and flashover time. Results show that if b greater than about zero, flashover time in the ISO Room-Corner Test is principally proportional to ignition time only.

• Transactions on Electrical and Electronic Materials
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• v.3 no.3
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• pp.34-38
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• 2002

In this paper, efficiency estimation of toxicity fee fire resistance cable experiments was measured smoke density of toxicity free fire resistance polyolefin insulation material and electric field dependence of tree shape in low density polyethylene (LDPE). One of the most serious causes of failure in high-voltage cables, can be an electrical discharge across an internal gab or void in the insulating material. Treeing due to partial discharge is one of the main causes of breakdown in the insulating materials and reduction of the insulation life. Therefore the necessity for establishing a method to diagnose the aging of insulation materials and to predict the breakdown of insulation and research of the fire resistance character has become important. First, we have studied on electric field dependence of tree shape in LDPE about treeing phenomena occurring on the high electrical field. Second, the measurement method is the attenuation quantity of irradiation by smoke accumulating with in a closed chamber due to non-flaming heat decomposition and flaming combustion. A main cause of fire-growth and generating toxic gas when, it bums, should be dealt with great care in life. safety design. The fire gases were occurred carbon monoxide and decomposition than in polyolefin due to incomplete combustion of PVC, which has high content of carbon in chemical compound.

• Journal of the Korea Institute of Military Science and Technology
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• v.16 no.6
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• pp.828-832
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• 2013

In this paper, numerical analysis was performed about whether the flash fire of loaded shells breaks out in the virtual combat vehicle according to sorts of the kinetic energy ammunition as the preceding research for vulnerability analysis inside the combat system by an external threaty ammunition. In this simulation, Autodyn program was used and the Lee-Tarver ignition and growth model was used to determine the flash fire outbreak. In this study, the kinetic energy ammunition was set of type A and type B in two kinds and the loaded shells was set of COMPB, TNT, PBX9404 and ANB. As a result, TNT and PBX9404 have much higher flash fire probability than COMPB in high explosive, ANB has very low flash fire probability.

• Fire Science and Engineering
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• v.34 no.1
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• pp.18-25
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• 2020

In this study, the heat release rate of pipe insulation is analyzed by considering the installation status in accordance with the standards ISO 20632 and NFPA 274. The flame retardation rate was evaluated for six types of test samples: polyethylene foam covered with beaten silver (PE(S)), PE foam tapped (PE(N)), elastomeric closed cell thermal insulation (rubber), Japanese PE foam (PE(J)), Japanese polyurethane foam (PU(J)), and Japanese styro form (ST(J)) by EN 13501-1 and fire growth curve. The results show that PU(J), PE(J), and PE(N) were Class E and ultra-fast, NFPA 274 test standards for Class D and Fast, and PE(S) by ISO 20632 were Class C and Slow, and Rubber and ST(J) were Classes and Low. However, the changes in the time-averaged maximum heat release rate for each test standard (ISO 20632 and NFPA 274) to evaluate the flame retardation rate differed among identical materials. This means that the fundamental study is necessary to analyze the more accurate reasons.

• Fire Science and Engineering
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• v.34 no.3
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• pp.126-133
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• 2020

The purpose of this study was to investigate the effects of unconditional self-acceptance and self-exposure of trainees on the post-traumatic growth and to develop a program to achieve post-traumatic growth beyond the previous level without suffering from psychopathological consequences such as post-traumatic stress disorder I wanted to help. For this purpose, unconditional self-acceptance, self-exposure, and Korean post-traumatic growth scale were used. First, it was confirmed that unconditional self-acceptance and self-exposure of firefighters are correlated with post-traumatic growth. Second, hierarchical regression analysis showed that unconditional self-acceptance has more influence on self-acceptance and post-traumatic growth than self-acceptance of firefighters. Based on the results of this study, we propose the program development and therapeutic intervention strategies to promote post-traumatic growth of firefighters.

• Fire Science and Engineering
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• v.31 no.5
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• pp.28-36
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• 2017

In this work, the effects of fire curtain and forced smoke ventilation on smoke spread to auditorium in the stage fire of theater were investigated using the Fire Dynamics Simulator (FDS). For the stage of 31 m (Width)${\times}$34 m (Depth)${\times}$32 m (Height) in dimension, the fast growth fire condition with 10 MW of heat release rate was applied. The forced smoke ventilation was set based on the National Fire Safety Code (NFSC) and previous research. The gap distances between the fire curtain and proscenium wall was established to be 0 m and 0.5 m. When the fire curtain was attached completely to the proscenium wall without any gap, no smoke spread from the stage to the auditorium occurred, independent of forced smoke ventilation. When the gap distance between the fire curtain and proscenium wall was 0.5 m, the smoke layer in the stage descended to the lower height from the bottom than the case without the fire curtain, which was because the smoke spread to auditorium was impeded by the fire curtain. Under the same fire curtain condition, the case with the forced smoke ventilation led to decreasing the mass flow rate of outflow through the gap between the fire curtain and proscenium wall, as compared to the case without the forced smoke ventilation. Based on this study, it was confirmed that the fire curtain and forced smoke ventilation were the effective tools to hold down the smoke spread to the auditorium in the stage fire of theater.