• Proceedings of the KSR Conference
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• 2004.06a
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• pp.277-283
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• 2004

The time to ignition, heat release rate characteristics and carbon monoxide yield of fiber reinforced and sandwich phenol resin were investigated with cone calorimeter. The fire characteristics of unsaturated polyester, mostly being applied to the existing passenger train, and phenolic resin were compared. Thermal gravimetric analysis(TGA) was used to monitor the degree of thermal decomposition for the phenolic resin. According to the cone calorimeter data, the time to ignition, heat release rate and CO yield was faster and higher as the external heat flux increase. Under the same heat flux, the time to ignition of sandwich type phenolic resin was shorter than that of fiber reinforced. The result of comparison between unsaturated polyester and phenolic resin was that phenolic resin was shown to have better fire resistance than that of unsaturated polyester.

• Proceedings of the KIEE Conference
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• 2009.04a
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• pp.192-194
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• 2009

This study presents on the analysis fire hazards of communication cable. In order to analyze fire hazards fire retardant tests and con-calorimeter test is conducted. The fire retardant tests are IEC 60332-1 and UL 94 test. The results show that IEC 60332-1 test and It 9t test are not effective to estimate fire hazard. And various parameter is obtained by con-calorimeter test. It is necessary to analysis effectively fire hazards of cable for new fire retardant test.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.70-76
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• 2005

The interior materials of the urban subway car in operation are now being changed to new materials that meet the latest law in effect, the fire safety criteria of the urban railway vehicle. It was well known fact that the composite materials, that were applied to last subway car, were weak on the fire. Contrary to this materials, materials in work have good resistance to the fire. On the paper, To investigate the difference of fire safety level on the subway car, cone calorimeter was used to measure the heat release rate and total heat released according to the ISO 5660. A high radiative heat flux of 50kW/m2 was used to burn out all materials and to simulate the condition of fully developed fire case in the tests.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.21 no.6
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• pp.976-981
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• 2012

In this study, hardness, microstructure and temperature of glass transition are measured respectively by using SEM (Scanning electron microscope) and DSC (Differential scanning calorimeter) to analyze the effects on material properties by after-curing in the epoxy resin. As the result of hardness test according to the after-curing conditions, the higher the temperature of after-curing, hardness and heat resistance are, the higher hardness is. As a result of microstructure for each specimen by SEM, it could be confirmed that the specimen with after-curing has more dense fracture surface. It is also found that temperatures of glass transitions by DSC are comparatively higher in the specimens with after-curing, and the differences between after-curing conditions are negligible.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.165-169
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• 2011

실제 화재의 위험성을 평가하는 가장 좋은 방법은 직접 실재 화재 조건을 모사 또는 구현하여 평가하는 방법이다. 그러나, 비용과 시간 및 환경 문제를 생각한다면 쉬운 일은 아니다. 따라서 단위 재료를 태우거나, 전산 시뮬레이션을 활용하여 화재를 예측하는 방법을 활용한다. 본 연구에서는 콘칼로리미터 실험 결과를 기초 데이터로 실제 화재 실험인 room corner test의 총열방출량을 추정하였다. 그 결과 가연물의 부피 및 밀도와 보정상수를 활용하여 실제 총열방출량에 근접한 결과값을 얻을 수 있었으며, 산출된 총열방출량을 근거로 전산시뮬레이션을 수행, 시뮬레이션 결과값을 통해 재실자의 화재 및 연기에 대한 위험성 평가를 할 수 있었다. 본 결과를 통해 화재 시뮬레이션 수행 시 가연물에 따른 화재에 의한 위험성 평가를 할 수 있을 것으로 보인다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.314-317
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• 2011

최근 국내 장애인 복합시설의 증가와 함께 많은 사고 사례가 발생하고 있다. 하지만 장애인 시설 화재시 재실자가 장애인으로 비장애인 보다 피난 효율이 저하되어 수 많은 인재가 발생하고 있다. 따라서 장애인시설 피난 방화와 관련하여 강화된 규정이 필요하고 많은 연구가 이루어져야 할 것이다. 이에 따라 국내 장애인복합시설을 대상으로 가연물 조사와 Cone Calorimeter 실험을 통해 화재하중과 가연물 연소성상 등을 연구 분석한 결과 장애인 시설의 화재하중이 공동주택보다 높다는 것을 확인하였다. Cone Calorimeter 실험을 통해서 6개 시료 중 4개의 시료가 기준치 이상의 발열량을 보였고, 방염블라인드의 경우 Co, $CO_2$ 유해연기의 검출량이 기준치 이상으로 그 위험성을 확인 할 수 있었다.

• Transactions on Electrical and Electronic Materials
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• v.11 no.2
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• pp.69-72
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• 2010

This study investigates the thermal and mechanical properties of insulation elements through the mixing of epoxy based micro and nano particles. Regarding their thermal properties, differential scanning calorimeter and dynamic mechanical analyser were used to calculate the cross-linking densities for various types of insulation elements. The mechanical properties of the bending strength, the shape and scale parameters, were obtained using the Weibull plot. This study obtained the best results in the scale parameters, at 0.5 phr, for the bending strength of the epoxy nano-and-micro mixture composites.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.14 no.2
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• pp.168-174
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• 2002

In order to obtain a new heat transfer fluid having a high thermal capacity, micro-capsules of a phase-change material can be a successful candidate to be added into water. In this study, 25, 50, 100, and $200\mu$m diameter micro-encapsulated Lauric acids were tested by a differential scanning calorimeter. The Lauric acid itself had a single freezing curve, but the micro-encapsulated Lauric acid had double freezing curves. The second freezing dominated for $25\mu$m diameter Lauric acids. But the first freeing energy became big as the size of the capsule increased.

• Journal of the Korean Society of Safety
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• v.33 no.4
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• pp.15-20
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• 2018

In this study, we have performed the Cone Calorimeter test and Smoke density test in accordance with ISO 5660-1 and ASTM E662 respectively to check the smoke production characteristics of rubber flooring materials for railway vehicle. Early in the ASTM E662 test, more smoke was produced in the flame mode test than non-flame mode test, but later more smoke was produced in non-flame mode test. The correlation($R^2$) between TSR(Total Smoke Release) by ISO 5660-1 and Ds(Specific Optical Density) by ASTM E662 Flame mode was 0.782. The $R^2$ between TSR by ISO 5660-1 and Ds by ASTM E662 Non-flame was 0.930.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.196-201
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• 2006

Due to the damage which is caused by with the smoke, in the analysis statistics of a fire accident smoke is becoming the important evaluation index of fire quality. We must follow the procedures to use interior material for railway car as stated the Safety regulation for the urban railway car. In this study, we compared the Smoke Density of the train seat by test between Cone-Calorimeter and Smoke Density-Chamber. The results showed that the smoke density by test between Cone-Calorimeter and Smoke Density-Chamber is visible a similar tendency.