• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.112-115
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• 2011

본 연구는 고체가연물의 초기 점화 및 화재성장과정에서의 발열량을 대형화재발열량계(large scale fire calorimeter)를 이용하여 정량적으로 측정하고 화재발생 초기에 화재성장특성 파악하고자 한다. 실험에 적용된 고체가연물 화재는 단일/이중 목재화재, 폴리프로필렌 소재의 쿠션화재, 목재 및 폴리프로필렌 소재의 카페트 화재이며 화재발달 단계에서의 화재성장특성을 시간 제곱 화재성장 시나리오와 비교분석하고 고체 기본가연물의 화재성장과정을 이해한다. 구획조건이 화재발열량에 미치는 영향을 파악하기 위하여 자유연소상태와 ISO-9705 화재실 내부에서 화재실험이 수행되었으며 화재성장특성과 최대발열량등을 비교하였다. 본 연구는 설계화재와 화재시나리오를 설정하는데 있어서 고체가연물의 발열량 데이터 및 화재성장에 대한 정보를 제공하고 공간조건에 따른 발열량 측정데이터의 신뢰성 분석을 위한 기초연구로 활용될 수 있다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.87-88
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• 2019

In case of Korea, The Large-scale fire is consistently being such as 2015 Uijeongbu Fire, 2017 Jecheon Fire, 2018 Sejong Hospital Fire. Such a fire has a problem that the fire is spreading upper due to external flame spread. As a countermeasure the fire safety, the study about axial temperature prediction of external flame spread is consistently doing. But in korea, Vertical spandrel is specified as 40cm, and improvement is urgently needed. In this study, a repair material was selected to prevent the fire from spreading to a building where a flammable exterior material was installed and then pilot construction was carried out. Also, fire safety measures for buildings constructed with flammable exterior materials were examined.

• Safety and Health at Work
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• v.8 no.1
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• pp.42-48
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• 2017

Background: As one of the most frequently occurring accidents in a chemical plant, a fire accident may occur at any place where transfer or handling of combustible materials is routinely performed. Methods: In particular, a jet fire incident in a chemical plant operated under high pressure may bring severe damage. To review this event numerically, Computational Fluid Dynamics methodology was used to simulate a jet fire at a pipe of a compressor under high pressure. Results: For jet fire simulation, the Kemeleon FireEx Code was used, and results of this simulation showed that a structure and installations located within the shelter of a compressor received serious damage. Conclusion: The results confirmed that a jet fire may create a domino effect that could cause an accident aside from the secondary chemical accident.

• Journal of the Korean Society for Railway
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• v.7 no.3
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• pp.180-185
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• 2004

The present study investigates the effect of fire growth model on fire development characteristics in a carriage. The parallel processing version of FDS code is used to simulate the fire driven flow in a carriage and two types of fire growth model which are flame spread model and t$^2$ model are examined for the same geometrical condition. The heat release rates(HRR) of both model are similar each other until 30 s after ignition, but the flame spread model predicts 5 times higher than those of the t$^2$ fire model during the quasi-steady fire period. Maximum heat release rate in the case of flame spread model reaches about to 12 MW at 100 s after fire ignition. Also, various database of fire properties for combustible materials and more elaborate combustion model considering the flame spreading phenomena are required for better predictions of fire development characteristics using numerical simulation.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.05a
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• pp.103-104
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• 2013

As a result of experimenting 6 loading combustibles in domestic residential facilities by using Furniture Calorimeter, values of 2,391.26kW were appeared from sofas, 1,891.80kW from drawers, 1,778.95kW from mattress, 1,104kW from chairs, 291kW from tables, and 135.09kW from TV. Also, if applying α value of fire growing rate by classifying fire- growing speeds at NFPA 72 (National Fire Alarm Code 2007, Annex B), mattress can be defined as Ultra-Fast, sofa and drawers Fast, TV Slow, tables Slow, and chairs Medium.

• Journal of the Korean Society of Safety
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• v.17 no.4
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• pp.140-145
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• 2002

The Flash Point is one of the most important combustible properties used to determine the potential for fire and explosion hazards of chemical materials. An accurate knowledge of the flash point is important in developing appropriate preventive and control measures in industrial fire protection. The lower flash points for the Water + n-Propanol systems were measured by using Pensky-Martens closed cup tester. The experimental data were compared with the values calculated by the laws of Raoult and van laar equation. The calculated values based on the van Laar equation were found to be better than those based on the Raoult's law.

• Journal of the Korean Society of Combustion
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• v.22 no.1
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• pp.23-31
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• 2017

Large-scale fuel tanks emit massive amount of hardly-combustible VOC mixtures which are light hydrocarbon species in dilution with nitrogen and carbon dioxide. We have developed a lab-scale burner to combust those VOC mixtures by use of a turbulent partially-premixed flame as a pilot flame. For a higher HC treatment ratio, the mixture gases were reformed by a rotating arc plasma device. The results showed that the nitrogen mole fraction and the injecting speed of the VOC mixture influence on the performance of the burner. It was also found that the size of the pilot flame and the power supplied to the plasma device determine the overall HC treatment ratio and the concentrations of CO and NOx in the exhaust gas.

• Journal of Korean Institute of Fire Investigation
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• v.8 no.1
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• pp.41-48
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• 2006

The purpose of this study is to identify the fire danger of the electric radiant heating system and check the way how to use it and the problems that could be possible through a actual case. We carry out an experiment to identify the possibility of the fire in the similar condition of the actual fire case. The results of this study are as follows. It is a possible condition to fire if the air blast of the electric radiant heating system is blocked by some combustible materials such as plastic bags continuously. A temperature sensor and a residual current device are necessary to disconnect the power source. It is also necessary to attach a notice in front of the electric radiant hearing system that shows users the fire danger to forbid the possible fire. Fires could be happened by internal defects of the electronic products. However, we can also find many external reasons to happen fires. Therefore, we need to check all reasons to make fires in the scene of a fire.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.11a
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• pp.75-76
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• 2022

In the event of a fire in the lower space, a high temperature of 1000℃ or more and an explosive fire may occur due to the closed structural features and combustible materials. On the other hand, more than 90% of oyster shells are made of CaCO₃, and when heated to about 700℃ or higher, CaO and CO₂ is generated due to decarboxylation reaction. In this study, we try to infer the amount generated by CO₂ changing the weight of mortar using oyster shells as fine aggregates after heating. in conclusion It is considered that the smaller the particle, the greater the decarboxylation reaction and the greater the weight change.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.153-155
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• 2021

A large amount of combustible household waste are incinerated on a large scale. Incineration ashes including flooring and scattering materials are generated in the incineration facilities. The incineration materials (flooring and scattering) are generated 16.5% of the total amount ashes brought into the incinerator. The amount of incineration materials decrease the landfill period of existing landfills and increase the needs for the construction of new landfills. This study introduces technical and institutional suggestions to solve increasing incineration ash problem by recycling them. As a technical recycling method, incineration materials can be recycled by producing earthwork materials and concrete products. In addition, the government and local governments will be able to promote recycling by improving related laws such as the Waste Management Act and by preparing active institutional support measures such as incentives for recycling companies for Green New Deal strategies.