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수소충전소 폭발위험장소 완화를 위한 확산차단벽 최적화 설계
안승효(SEUNGHYO AN),오세현(SEHYEON OH),김은희(EUNHEE KIM),이준서(JUNSEO LEE),마병철(BYUNGCHOL MA) 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.6
Hydrogen emphasis on safety management due to its high potential for accidents from wide explosive limits and low ignition energy. To prevent accidents, appropriate explosion-proof electrical equipment with installed to safe management of ignition sources. However, designing all facilities with explosionproof structures can significantly increase costs and impose limitations. In this study, we optimize the barrier to effectively control the initial momentum in case of hydrogen release and form the control room as a non-hazardous area. We employed response surface method (RSM), the barrier distance, width and height of the barrier were set as variables. The Box-Behnken design method the selection of 15 cases, and FLACS assessed the presence of hazardous area. Analysis of variance (ANOVA) analysis resulting in an optimized barrier area. Through this methodology, the workplace can optimize the barrier according to the actual workplace conditions and classify reasonable hazardous area, which is believed to secure safety in hydrogen facilities and minimize economic burden.
반응표면법과 ANOVA 기반의 수소 누출에 대한 유효인자 분석
이준서(JUNSEO LEE),오세현(SEHYEON OH),안승효(SEUNGHYO AN),김은희(EUNHEE KIM),마병철(BYUNGCHOL MA) 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.6
While hydrogen is widely used, it has a low minimum ignition energy, raising safety concerns when using it. This research studied which parameters are the key variables in the hydrogen release and diffusion. These parameters were divided into six process variables in the initial release and two environmental variables in the dispersion. One hundred and twenty cases were selected through design of experiment, and the end-point in each case were analyzed using PHAST. Afterwards, an end-point prediction model was developed using RSM and ANOVA, and the impact of each variable on the endpoint was analyzed. As a result, the influence of eight variables was graded. The nozzle diameter had the greatest influence on the end-point, while the pipe roughness coefficient had no effect on the end-point. It is expected that these results will be used as basic data to improve safety across all fields of hydrogen handling facilities.