• 제목/요약/키워드: Rate of Heat Release

검색결과 666건 처리시간 0.023초

건물 내장재의 화재위험성 평가 방법 (A Fire Hazard Assessment of Interior Finish Materials)

  • 김운형
    • 한국화재소방학회논문지
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    • 제12권2호
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    • pp.17-28
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    • 1998
  • 건물 화재시 예상되는 내장재의 실째 화재성농올 기준으로 한 위험성 명가방법올 제시하였다. 이률 위해 ISO Room Corner Test. (9705)를 기준으로 Qui ntie re의 화재확산 모델을 이용하여 내장재의 열 적 특성과 플래쉬 오버 도달시간과의 상관성을 유도하고 스쩨덴의 실제 시험결과와 비교 분석하였다. 이 결과, 내장재의 상대척인 화재위험성은 화재확산 변수 b륨 기준으로 명가될 수 있었다.

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옥외저장소 화재 시 인접 저장소 화재 영향에 대한 연구 (A Study on the Fire Impact of Adjacent Storage at Outdoor Storage Fire)

  • 김은지;박성식;전용한
    • 대한안전경영과학회지
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    • 제26권3호
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    • pp.93-100
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    • 2024
  • Outdoor storage fires have a significant impact on the surrounding environment, including adjacent storage facilities and buildings. Therefore, it is essential to review and manage the fire impact to minimize damage to human life and property on the outdoor storage fires. In this study, the heat release rate and radiant heat flux were simulated according to the fire time, wind veolcity, and presence or absence of water spray equipment in an outdoor storage facility fire, and the fire impact was analyzed. The outdoor storage was designed to simulate two scenarios on the outdoor storage fires containing gasoline, and FDS was used for fire simulation. As a results, when the water spray facility was not operating and the wind velocity was 5 m/s, the maximum radiant heat flux was 24.80 kW/m2, which exceeded the limit radiant heat flux of 20 kW/m2. When the water spray facility was operating and the wind veolcity was 10 m/s, the maximum radiant heat flux was 18.77 kW/m2, which did not exceed the limit radiant heat flux, indicating that the fire impact on adjacent storage facilities was relatively small.

차동식 열감지기 설치기준 비교분석에 관한 연구 (Differential temperature fire detector analysis of comparative study based on sensor installation)

  • 황동환;양광모;강경식
    • 대한안전경영과학회지
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    • 제16권4호
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    • pp.379-389
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    • 2014
  • Fire detectors are designed to minimize loss of life from a fire alarm system as an alarm to help evacuate more quickly until the completion of the evacuation alarm should be continued. the purpose of such alarms in order to achieve the characteristic fire heat release rate reaches a certain level, or when a certain time has elapsed, when the heat detector is to be alarms to answer. Requires a quick response, it is desirable to install the sensor as much as possible, but taking into account the cost of installation problems by engineering approach to minimize the quantity and rapidity of detection capability should be increased. In order to increase the rapidity of fire detectors in a room according to the height of the sensing period is to be maintained the optimum distance of the fire detector detects characteristics should be considered. Differential spot-type heat detectors installed domestic basis, depending on the type of sensor that can detect one sensor area is limited and less than 4m ceiling height regulations and simply double the number in excess of 4m and intended to be installed.

커먼레일식 디젤기관의 EGR율과 바이오디젤 혼합율에 따른 연소 및 배기 특성 (Effects of Bio-diesel blending rate on the Combustion and Emission Characteristics in a Common Rail Diesel Engine with EGR rate)

  • 윤삼기;최낙정
    • 동력기계공학회지
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    • 제18권2호
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    • pp.5-11
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    • 2014
  • The purpose of this study is to investigate the specific characteristics of combustion and exhaust emissions on a 4-cylinder common rail diesel engine as EGR rate and the rate of blended bio-diesel was altered. Bio-diesel fuel which is a sort of alternative fuels can be adapted to diesel engine directly without modifying. This study was performed to 2000rpm of engine speed with torque 30Nm while EGR rate and the rate of blended bio-diesel was changed. Decreasing combustion pressure and increasing the rate of heat were occurred when we had changed the EGR rate on the 20% of bio-diesel blended diesel fuel. The maximum pressure of combustion and the IMEP became higher as the EGR rate and the rate of blended bio-diesel were changed. Exhaust gas temperature was increased the higher rate of the blended bio-diesel under the fixed EGR rate. However, it went down as the EGR rate increased. The amounts of CO and Soot were reduced with increasing the rate of the blended bio-diesel without changing EGR rate and raised with increasing of the EGR rate. On the fixed EGR rate, NOx was increased along with growing the rate of the bio-diesel. On the other hand, it was decreased while EGR rate were going up.

ARC(Heat-wait-search method)와 Isothermal 조건을 이용한 압축형 복합화약의 열적 특성 및 노화 예측 연구 (Study on the Thermal Property and Aging Prediction for Pressable Plastic Bonded Explosives through ARC(Heat-wait-search method) & Isothermal Conditions)

  • 이소정;김승희;권국태;전영진
    • 한국추진공학회지
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    • 제22권4호
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    • pp.55-60
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    • 2018
  • 열적 특성은 에너지 물질 분야에서 중요한 특성 중 하나로, 분해열을 방출하기 때문에, 열적 특성 분석에 DSC(Differential Scanning Calorimetry)가 자주 사용된다. 그러나 DSC 측정의 경우, 용융과 같은 열역학적 변화가 kinetics 분석에 방해를 끼친다. 이번 연구에서는 이 문제점을 해결하는 방안으로, 등온 조건으로 한 DSC 기초 데이터와 g 단위로 측정하는 ARC(Accelerating Rate Calorimetry)의 데이터를 이용하여 AKTS(Advanced Kinetics and Technology Solutions) thermokinetic 프로그램을 이용하여 열적 노화 특성을 예측, 비교한다.

ISO 13784-1 RRT 결과의 정밀도 분석 (Precision analysis on the ISO 13784-1's Round Robin scenarios)

  • 박계원;정재군
    • 한국화재소방학회:학술대회논문집
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    • 한국화재소방학회 2012년도 춘계학술발표회 초록집
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    • pp.333-336
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    • 2012
  • ISO 13784-1 sandwich panel tests were conducted by FILK, KICT in Korea, SP in Sweden and CSIRO in Australia. Sandwich panels composed of steel sheets, EPS and glass wool supplied by FILK were tested. Mainly heat release rate was compared and equlity of distribution also analyzed on the point of statistical view based on ISO.

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ISO 13784-1 시험 방법에 의한 국제 상호비교 평가 분석 (Analysis on International Round Robin Test's Result by ISO 13784-1 Standard)

  • 박계원;정재군
    • 한국화재소방학회:학술대회논문집
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    • 한국화재소방학회 2011년도 추계학술논문발표회 논문집
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    • pp.201-204
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    • 2011
  • ISO 13784-1 sandwich panel tests were conducted by FILK, KICT in Korea, SP in Sweden and CSIRO in Australia. Sandwich panels composed of steel sheets, EPS and glass wool supplied by FILK were tested. Mainly heat release rate was compared and equality of distribution also analyzed on the point of statistical view based on ISO.

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침대 매트리스에 대한 화재 안전성 평가 연구 (Study on Fire Safety Test Method for the Bed Mattress)

  • 박계원;정재군
    • 한국화재소방학회:학술대회논문집
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    • 한국화재소방학회 2011년도 추계학술논문발표회 논문집
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    • pp.197-200
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    • 2011
  • This study aims to inform of current situation related to fire safety performance regulation on bed mattress in domestic and foreign countries, and even to make a slight analysis report on heat release rate of bed mattress based on preliminary KICT study which has comparison data together with several items inside house.

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