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석유화학 플랜트 시설물의 화재 온도분포 특성에 관한 해석적 연구
조규환(Gyuhwan Cho),전기수(Kisoo Jeon),안재권(Jaekwon Ahn) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.1
일반적인 시설물과 달리 높은 인화성 및 가연성 물질을 취급하는 석유화학 플랜트 시설물의 경우, 취급하는 물질에 따른 다양한 화재조건들과 더불어 시설물의 구조형태(밀폐형, 개방형 등)들을 우선적으로 검토할 필요가 있다. 이에 본 연구에서는 석유화학 플랜트 시설물의 구조형태 3종을 가정하여, 화재조건별 화재 시뮬레이션을 수행하였으며 각 조건별로 도출된 공간온도분포를 분석하였다. 그 결과, 화재유형 및 화원의 종류와 더불어 시설물 구조형태에 따라서 다양한 온도분포 결과를 확인하였다. 이와 같은 결과들을 미뤄 볼 때, 생산 목적에 따라 다양한 물질을 취급하는 석유화학 플랜트 시설물의 경우, 설비/시설물의 배치 및 구조적 형태와 더불어 화재 시 발생할 수 있는 화재조건들을 종합적으로 검토하여 그에 상응하는 내화설계가 이루어져야 할 것으로 판단된다. In petrochemical plant facilities handling highly inflammable and combustible substances, it is necessary to preferentially review the frame type (closed or open) of the facility with consideration to the various fire conditions that may arise depending on the substances being handled. Accordingly, a fire simulation was carried out in this study for different fire conditions by assuming three frame types, and the spatial temperature distribution was analyzed for each condition. Various temperature distributions were found according to the fire type, fire source, and frame type of the facility. The results showed that petrochemical plant facilities handling diverse substances need to implement fire-resistant designs appropriate for the purpose of the facility by comprehensively considering the arrangement and frame type of the facility and the fire conditions that are likely to arise.
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광학입자센서 내 노즐형상과 입자 크기에 따른 측정효율 변화에 대한 실험 및 시뮬레이션
김영길(Younggil Kim),아툴 쿨카르니(Atul Kulkarni),전기수(Kisoo Jeon),윤진욱(Jinuk Yoon),김태성(Taesung Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The OPS (optical particle sensor) based on light scattering principle are widely used in clean rooms and for the atmospheric environment monitoring applications. Its popularity lies in its real time measurement ability with no physical contact with the particles under measurement. The detection efficiency of the OPS is mainly governed by the scattered light intensity, which strongly depends on particle size and its velocity in the detection area. In this study, we carried out simulation and experiments to evaluate the effect of nozzle size and shape (geometry) on detection efficiency of the OPS. A commercial computational fluid dynamics software FLUENT was used to simulate the flow field and particle trajectories. The effect of nozzle size and shape is evaluated as the count mode of scattering intensity with particle size (300, 500, 700 ㎚) experimentally. Simulated particle velocities were compared with experimental results and found within limit.
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석유화학 플랜트 내화용 피복재의 화재손상 특성에 관한 연구
조규환(Gyuhwan Cho),안재권(Jaekwon Ahn),전기수(Kisoo Jeon) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.3
As industrial facilities, petrochemical plants require prompt investigation, diagnosis, and recovery in the event of fire damage associated with disasters and accidents. Due to the characteristics of petrochemical plants, which are mostly composed of steel structures with fire-resistant coating materials, the coating materials are the first to be damaged. Accordingly, in this study, the fire damage characteristics of fire-resistant coating materials were analyzed experimentally, verifying the possibility of estimating the heating temperatures based on such characteristics. The results show a correlation between the foam expansion ratio and the heating temperature of intumescent fire-resistant coating materials with foam properties. A significant correlation was found between the density and adhesion strength ratio and the heating temperature of spray-applied fire-resistant coatings. The results suggest the possibility of estimating the heating temperatures based solely on the fire damage characteristics of the coating materials, which could provide a platform for simplifying existing methods for investigating and diagnosing fire damage.
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