• Journal of Korean Tunnelling and Underground Space Association
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• v.9 no.4
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• pp.343-349
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• 2007

The reduced scale fire test provides basic data but it is not enough to analysis real fire problem directly because there is no exact analogy theory between a real fire and the reduced scale model. Therefore we have developed the large scale calorimeter in order to the real scale fire test. This advanced large scale calorimeter used for physical properties such as a heat release rate, based upon consumption of $O_2$ method. Using this large scale calorimeter, we cameo out the real scale vehicle fire test in order to evaluation for heat release rate. We obtained the calculated result for HRR $2.3{\sim}3.4\;MW$ and this result is very similar to the PIARC candidate HRR. It is approve that this facility has the reliability and it is capable of applying to the advance fire research in the future.

• Fire Science and Engineering
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• v.17 no.1
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• pp.76-84
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• 2003

This study was designed to investigate fire characteristics of the plastics insulating materials such as a polystyrene foam, polyurethane foam, and polyethylene foam, which is used an insulating materials i3t workplace. The fire characteristics of plastic insulating materials were carried out from the Cone Calorimeter test according to ISO 5660. The experimental materials used were commercial plastic insulating materials by products and their composition is not disclosed by the manufacturer. As the results of this study; the heat release rate of plastic insulating materials was increased with increasing density and heat flux. The peak heat release rate and the average heat release rate for the polyethylene foam in insulating materials were showed the highest, and the peak heat release rate for the polyethylene foam was the highest. The standard of heat release rate with a kind of products and heat flux of irradiance to prevent fire by plastic insulating materials was suggested.

• LP가스
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• s.67
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• pp.26-32
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• 2000

도심지내에 위치한 부천 LPG충전소 사고 조사를 통하여 가장 피해효과가 큰 탱크로리 폭발에 따른 결과를 분석하였다. 분석범위는 BLEVE 현상에 의한 방출열과 과압이 충전소 주변에 위치한 구조물이나 인체에 미치는 영향을 대상으로 실제 현장조사를 통하여 수집된 피해결과와 이론적인 모델(PHAST-Process Hazad Analysis Software Tools) 분석 결과를 비교하였다. 부천 LPG 충전소 폭발 사고의 피해효과는 방출열의 경우 두 가지 모두 큰 차이를 보이지 않았으나 과압의 경우, 실제 피해는 이론적 모델 분석결과의 약 15%정도에 해당하는 축소된 거리에서 나타났다. 또한 충전소 인근에 위치한 구조물에 대한 피해효과는 부분적으로 과압에 의한 균열 및 붕괴 현상보다는 열 효과에 의한 콘크리트 강도 저하와 성상변화가 크게 나타났다.

• Fire Science and Engineering
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• v.17 no.2
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• pp.17-24
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• 2003

Thermal effects and characteristics of heat release for electrical wire installed in pascon and concrete trough have been theoretically approached and studied in consideration of the structure of products. The points of difference between two troughs have been evaluated by theoretical approach and estimated by computer simulation in similar condition of institution environment. As a result, the average of the intrinsic thermal conductivity of concrete trough is superiority to pascon trough considering only for characteristic of materials. But when considering for institution environment (thickness, area and trough structure etc) as the results of the calculation and computer simulation using FLUENT, the degree of heat release for pascon trough is of advantage to concrete trough.

• Fire Science and Engineering
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• v.16 no.2
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• pp.75-80
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• 2002

In this paper, some experiments of a heat release rate and toxicity for underground utility 22.9kv cable in fire was conducted and analysed applying plume equation and smoke chamber test separately, A 22.9 ㎸ power cable is selected for testing heat release in ISO 9705 geometry and toxicity production is measured with NES 713 (British-Naval Engineering Standard)test. In test results, Cable heat release reached about 60 ㎾ above 1.2 m from heptane pan and CO generated lethal concentration under 30 min. exposure condition.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.369-372
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• 2011

본 연구에서는 철도차량의 실물화재에 대한 열방출율을 축소모형으로 예측하기 위해 실험적인 조건들을 연구하였다. 축소모형의 크기는 지하철 전동차의 1/10 스케일을 적용하여 길이 1.89m, 너비 0.295m, 높이 0.235m 이며 15mm의 석고보드를 사용하였다. 축소모형의 실험적 조건으로는 한쪽 면만 개방한 4개의 개구부 환기조건과 3mm, 6mm의 종이내장재를 이용하여 열방출율을 예측하여 보았다.

• Fire Science and Engineering
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• v.26 no.1
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• pp.89-95
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• 2012

In this study, we were manufactured wood flour-HDPE composites by modular co-rotating twin screw extruder with L/D ratio of 42. We was measured cone calorimeter test and thermogravimetric analysis (TGA) to find the combustion characteristics and thermal properties for wood flour-HDPE composites. We then evaluated the effect of three additive-type flame retardants on fire resistance performance. The cone calorimeter test showed that the heat release rate (HRR) of untreated composites was the highest Peak HRR ($446.6kW/m^2$) as well as Mean HRR ($185.5kW/m^2$). From the TGA, it was shown that composites added flame retardants began early thermal decomposition and improved thermal stability.

• Fire Science and Engineering
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• v.18 no.2
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• pp.67-72
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• 2004

This study describes to assess combustion characteristics of fiber reinforced plastic (FRP) that is used an elements of building or structure in workplace. The combustion characteristics of the fiber reinforced plastic were carried out using by a Cone Calorimeter according to ISO 5660 standard. As the results of this study, the time to ignition and heat release rate of the fiber reinforced plastic was differ with heat flux of irradiance and content of flame retardant agent. The heat release rate of the fiber reinforced plastic was increased with increasing heat flux of irradiance. The flashover propensity of the fiber reinforced plastic using time to ignition and peak heat release rate was examined according to classification method by R.V. Petrella.

• Proceedings of the Korean Nuclear Society Conference
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• 1995.05a
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• pp.580-587
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• 1995

1979. 3.28 미국 TMI-2의 사고를 계기로 개발된 증상기준 비상운전절차서는 고리 3,4/영광 1,2호기의 경우 '92. 2에 개정된 ERG-18를 근거로 하여 각 발전소 운전담당 자들에 의하여 확인 및 검증 (Verification S Validation) 작업을 통하여 금년부터 본격적으로 적용되기에 이르렀다. 그러나 비상운전절차서의 특성상 리 발전소별 특정 설정치의 계산에서 어려움을 겪었으며 아직도 재확인 작업을 통한 최적화 여지가 상 당부분 잔존하고 있다. 여기어서는 고압발전소인 고리-3,4/영장-1,2호기 비상운전절차서에 있어서 증기발생기에 공급되는 정상 밋 비상급수의 전체 상실사고시 노심 노출 방지 및 노심 열 제거를 위해 적응되는 기능회복절차서의 "2차 열제거원 상실시 조치" 중 방출 및 충전 운전의 성공적 시작점을 계산, 개정된 비상운전절차서와 비교하여 특정 발전소의 방출 및 충전 운전 설정치를 제시하였고, 이러한 결과로부터 현재 보수적으로 설정된 값의 완화를 유도하여 방출 및 충전 운전 시작전, 운전원으로 하여금 급수확보를 시도할 수 있는 시간여유의 연장을 도출할 수 있었다.도출할 수 있었다.

• Solar Energy
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• v.18 no.3
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• pp.169-175
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• 1998

Metal hydrides can be used for the purpose of heat storage and transportation from the industrial complex which own recoverable waste heats to the neighboring cities by the medium of hydrogen. The properties of metal hydrides, some problems of heat transportation using metal hydrides, and the example of heat transportation system were discussed.