• 한국화재소방학회논문지
• /
• 제31권1호
• /
• pp.1-9
• /
• 2017

본 연구에서는 거실제연설비가 설치된 철도 지하환승통로에 현장성능평가시험인 제연 TAB(Test, Adjusting, Balancing)를 실시하여, 제연설비 성능 확보에 미치는 영향을 분석하고 개선방안을 도출하였다. 제연 TAB는 지하환승통로의 제연설비 설계자료 분석, 제연덕트 누기테스트, 제연송풍기와 덕트의 풍량 및 풍속 측정, Smoke test로 나누어 진행되었다. 제연덕트 누기시험을 통해 누기율을 측정하여 덕트의 기밀성을 확인하였고, 흡입측 덕트 정압손실로 인한 제연풍량 부족의 문제점을 개선하여 송풍기의 성능을 확보하였다. 또한, Smoke test을 통해 예상제연구역별 제연댐퍼 동작 시 자연풍, 열차풍 영향으로 인한 문제점을 분석하고 개선하여 예상 제연구역 내 제연이 원활하게 이루어짐을 확인하였다.

• 한국화재소방학회:학술대회논문집
• /
• 한국화재소방학회 2008년도 춘계학술논문발표회 논문집
• /
• pp.15-18
• /
• 2008

A study on the fire and smoke behavior on experiments and analysis through STAR-CD in using about behavior analysis of the smoke. Kerosene of 3L in using on the experimental garden of 30cm in diameter same applies to heat release rate(HRR), buoyant force by Plume can be calculated at a rate of 1m/s. The result of experiment in average of velocity were 0.29m/s, and interpreted result were 0.28m/s. Besides, it is proved by interpreted that behavior of smoke movement can be not observed in the experiment. After smoke is Plume increased, ceiling-jet in formation being descend in smoke layer will be more thick smoke layer, and then vertical wall is collapsed in formation of wall-jet being descend. It is defined that smoke layer is more thick through descending course in wall-jet and ceiling-jet.

• 한국안전학회지
• /
• 제33권4호
• /
• pp.15-20
• /
• 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.

• 아동학회지
• /
• 제26권4호
• /
• pp.101-112
• /
• 2005

Subjects were 279 parents of 4- and 5-year-old day care children. Statistical techniques were factor analysis, t-test, ANOVA, Pearson's correlation, and multiple regression. Major findings were that parents with higher levels of education and income showed a higher level of attitudes and coping behavior toward preschoolers' exposure to secondhand smoke. Parents who were smokers had a higher level than non-smokers of knowledge and coping with preschoolers' secondhand smoke. Parents with higher levels of knowledge and more negative attitudes about secondhand smoke were more active in dealing with secondhand smoke. Parents' knowledge and attitudes were significant predictors of their coping behavior with preschoolers' secondhand smoke. Parents' knowledge was more predictive of parents' coping behavior than their attitudes.

• 한국안전학회지
• /
• 제18권3호
• /
• pp.34-38
• /
• 2003

The large eddy simulation based Fire Dynamics Simulator was utilized to investigate the effects of the size of an opening on smoke removal performance for the three smoke control systems-ventilation purge, and extraction. Three different opening sizes, $r_A$=1, 2, and 3 were investigated while the flow rate remained 0.75 $m^3/s$ at the inlet or outlet depending on the systems. Increase of the opening size did not give a significant difference in the smoke removal rate for the three smoke control systems, though the increasing opening size slightly improved smoke removal. The extraction system was shown the best smoke control system, and the purge system yielded low performance compared to the other two systems for all the different opening sizes.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2022년도 봄 학술논문 발표대회
• /
• pp.67-68
• /
• 2022

Foreign countries stipulate that ventilation and smoke control facilities are installed in logistics warehouses. On the other hand, in Korea, the design guidelines and standards of ventilation and smoke control facilities for logistics warehouses are not clear even in the situation where the number of human casualties caused by smoke has increased until recently. Accordingly, the smoke descent time according to the vent was calculated. As a result, when there was no vent, the smoke descent time was 369s. On the other hand, when the vent was installed, smoke did not fall because the amount of smoke was greater than the amount of smoke generated.

• 한국화재소방학회논문지
• /
• 제19권2호
• /
• pp.8-12
• /
• 2005

청정실의 화재는 연기입자의 확산으로 인해 큰 피해를 초래할 수 있다. 청정실내 화재가 발생한 구역에서 다른 구역으로 연기가 확산되는 것을 방지하기 위해 구역경계에 방연커튼을 설치할 때, 그 폭이 연기의 확산에 미치는 영향을 전산유체역학 프로그램을 사용하여 조사하였다. 청정실 내 크기 $30m\times10m\times4m$의 구역에 1MW의 메탄을 화재가 발생한 것으로 화재시나리오를 설정하였다. 구역 경계에 방역커튼을 설치하지 않은 경우와 각각 폭이 1, 2, 3m인 방연커튼을 설치한 경우에 대한 결과를 비교하였다. 커튼이 설치되지 않은 경우에는 연기가 구역경계를 통해 확산됨을 확인하였다. 또, 방연커튼의 폭이 클수록 연기확산을 지연시키지만, 연기확산을 차단하기 위해서는 경계 칸막이를 설치해야 함을 알 수 있었다.

• 한국분무공학회지
• /
• 제18권3호
• /
• pp.132-139
• /
• 2013

Smoke emissions from light duty diesel vehicles were measured using light extinction method with the free acceleration test mode. The smoke emissions for each measurement cycle of the free acceleration method showed large variations according to driver's pedal pushing pattern. The smoke values for each measurement cycle initially increased and reach a peak value. Integration of the smoke emissions with time for each measurement cycle was performed to get a representative smoke value which was obtained by averaging the integrated results. Two kinds of integration time range were used. One is range over the whole measurement cycle of the free acceleration method. The other is only the acceleration range in the measurement cycle. Overall, variation of the representative smoke values obtained by the integration method was reduced comparing to the traditional representative smoke value which was obtained from a peak smoke value over the measurement cycle. Ten vehicles of the same model with 2.5 liter diesel engines, and seven vehicles of the same model with 2.7 liter diesel engines, were tested using the free acceleration test method.

• 한국화재소방학회논문지
• /
• 제20권2호
• /
• pp.8-13
• /
• 2006

제연설비와 스프링클러설비의 필요성을 확인하고 연기확산 가능성을 조사하기 위해 청정실 화재의 시뮬레이션을 수행하였다. 바닥면적 $39m{\times}13m$, 높이 4 m의 작업구역에 1MW의 메탄올 화재가 발생했을때, 제연설비와 스프링클러설비의 정상작동과 작동실패에 따른 연기누출 여부를 조사하였다. 제연설비가 정상적으로 작동하는 경우에는 스프링클러설비에 관계없이 연기가 안전하게 배출됨을 알 수 있었다. 화재확산과 연기발생을 억제하고 발생한 연기를 신속히 배출하기 위해 스프링클러설비가 필요하며, 스프링클러설비와 제연설비가 신속하게 작동할 수 있도록 신뢰도가 높은 스프링클러설비 헤드와 자동화재탐지설비가 필요함을 확인하였다.

• 동의생리병리학회지
• /
• 제23권2호
• /
• pp.505-511
• /
• 2009

The purpose of this study is to evaluate the difference about pathogenesis of smoker and non-smoker. Author used DSOM to investigate oriental pathogenesis. Smoke group is consisted of people who have history of smoke, and they don't have history of lung disease(Athma, tuberculosis, COPD, suchlike). Non-smoke group is consisted of people who have no history of smoke and they also don't have history of lung disease. Author carried out each group's PFT(Pulmonary Function Test) by AST(American Thoracic Society) method. DSOM was used for pathogenesis investigation of two groups. There was significant difference between smoke group and non-smoke group in FVC (p<0.05), and In non-smoke group, there was significant difference between male and famale in FVC, FVC%, FEV1, FEV1%. There was significant difference between smoke group and non-smoke group in Heat(熱), Cold(寒)(p<0.05). In Male grouop there was significant difference between smoker and non-smoker in deficiency of Deficiency of Yin(陰虛), Heat(熱). In non-smoke group comparison of sex, there was significant difference between male and female in Deficiency of blood(血虛), dampness(濕)(p<0.05). This result showed that the difference of pathogenesis between smoke group and non-smoke group.