• Proceedings of the KSR Conference
• /
• 2008.11b
• /
• pp.66-72
• /
• 2008

In this study, transient 3D numerical simulations were performed to analyze the characteristics of fire driven flow for smoke ventilation system operating conditions in the deeply underground subway station. The smoke flow patterns were compared and discussed under smoke fan operating mode and off mode in the platform. Soongsil Univ. station(line number 7)was chosen for simulation which was the one of the deepest underground subway stations in the each lines of Seoul. The geometry for model is 365m in length include railway, 23.5m for width, 47m for depth. Therefore 10,000,000 structured grids were used for fire simulation. The parallel computational method for fast calculation was employed to compute the heat and mass transfer eqn's with 6 CPUs(Intel 3.0GHz Dual CPU, 12Cores) of the linux clustering machine. The fire driven flow was simulated with using FDS code in which LES method was applied. The Heat release rate was 10MW and The Ultrafast model was applied for the growing model of the fire source.

• Fire Science and Engineering
• /
• v.18 no.4
• /
• pp.103-109
• /
• 2004

The risk of underground space become an important issue of life safety thought the Taeku subway line Accident. It is essential to study of smoke control screen to minimize the damage of human life because of smoke passage and passenger evacuation routes are on the same vertical and dispersion movement. The Fire modeling result shows the effect of fire control screen can save the evacuation time about 2-2.5 times compare to existing the system However, The designs of fire control screen need to be complied with smoke control ventilation system to present optimum design and the position of installation.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
• /
• 2009.11a
• /
• pp.171-174
• /
• 2009

본 소고의 목적은 중국과 한국의 지하철 역사 내에 있는 시각정보디자인의 양식 및 감성의 비교연구이다. 한국의 마찬가지로 중국 사회도 급속한 경제성장과 더불어 지하공간의 중요성이 증대되어지고 있다. 그리하여 지하교통의 아내시스템의 중요성이 더욱 뚜렷하게 나타나게 되었다. 지하 공간에서 시각적 정보 디자인 성패의 가장 큰 평가기준은 바로 그 디자인에 대한 대중들의 인지도의 강약이라 할 수 있다. 그러나 지하철의 역할이 중요함에도 불구하고, 안내 시스템 등과 같은 일부 지하철 내부의 시각적 정보들은 사람들의 출입 등에 편의를 제공해주지 못하고 있다. 또한 각 지하철 역사내 시각정보시스템의 통일된 체계 구축과 함께 지역적 특성도 부가되어야만 한다. 때문에 시각적 정보에 대한 대중들의 인지도를 어떻게 높일가? 하는 문제는 모든 지하공간의 시각정보디자인에 있어서 반드시 해결해야 할 문제가 되었다. 본 논문에서는 한구 부산의 서면 지하철 역과 베이징 서지문 지하철 역 내부의 시각적 정보 디자인의 색채 조형 문자 등 시각 디자인을 구성하는 전반적인 관련요소에 대한 비교와 분석을 통해, 서로 다른 문화의 영항 하에서 두 곳의 시각적 정보 디자인의 공통점과 감성의 다른 점 및 어떤 디자인이 대중들의 시각적 정보 디자인의 인지도 높일 수 있는지에 대한 연구를 진행하고자 한다.

• Proceedings of the KSR Conference
• /
• 2008.11b
• /
• pp.50-55
• /
• 2008

The comparative analysis of fire-driven flow simulation for Dae-Gu subway station was performed using FDS and Fluent. The boundary condition was obtained from analyzed data for Dae-Gu subway fire accident which had been outbreaked in 2003 year. The smoke flow in the second and third basement has been analyzed. The CO and temperature distribution in the train units and station platform have been obtained with FDS and FLUENT and compared with each other. Total simulation time is 600s and the results are compared of each 10sec The analyzed data will be applied to the passenger evacuation simulation for Dae-Gu subway station and used to optimal design method.

• Proceedings of the KSR Conference
• /
• 2007.05a
• /
• pp.1807-1813
• /
• 2007

The study aims at analyzing an underground station refuge model using EXODUS, one of the refuge simulation programs. The model for simulation is the Daegu Subway (Joongang-ro station). The details of the accident are referred to as the simulation condition the refuge time of traveling from the $3^{rd}$ basement platform to the $1^{st}$ basement is mainly calculated, with passengers numbering 1,000 including 329 at car 1079, 320 at car 1080, and 360 who are not on board. Reference data is used to set up the position of passengers. CFAST fire simulator is also used, and a fast curve among the $t^2$ growth curves, selected as fire growth scenario. The zone is divided into a total of 24 including 18 at the $3^{rd}$ basement platform and 6 at the $2^{nd}$ basement the $1^{st}$ basement is excluded in the fire simulation, however.

• Journal of the Korean Society for Railway
• /
• v.10 no.1 s.38
• /
• pp.67-73
• /
• 2007

Experiments were carried out to investigate smoke movement in platform of a subway station which currently is in service in Pusan, the second largest city in Korea. The recently constructed underground station of the "bank type" (two platforms on both sides of track) which is the popular layout of platforms in Korea, is chosen in Pusan. The smoke generator and heater are used for simulating the smoke movement at the fire break in the platform located in the 2nd basement of the station. Video recordings were used to monitor smoke lowering. In this study, the movements of smoke in the underground station are investigated under various smoke-control operating modes. Three tests wire conducted according to its operating mode of the ventilation systems in the platform: no operation of any ventilation systems, smoke extraction mode in occurrence of fire (presently running mode) and full capacity of smoke extraction where all vents are activated in the platform. The results can be used for comparing with the numerical prediction results of fire subway stations.

• Journal of Korean Society of Environmental Engineers
• /
• v.32 no.3
• /
• pp.287-295
• /
• 2010

Dust samples have been collected from streets, schools, subway stations and households in Daegu metropolitan city. Samples were sieved through a 100 ${\mu}m$ mesh and the concentration of 14 elements have been determined using by ICP after acid extraction. Results showed that Ca, Fe, K, Mg, Mn, Na and V were influenced by natural sources while Cd, Cr, Cu, Ni, Pb and Zn were influenced by anthropogenic sources. The measured values were remarkably higher in components from natural sources than in components from anthropogenic sources. In particular, school dust had higher levels of Ca and Pb and subway station dust had higher levels of Cu and Zn. The percentage composition of chemicals from subway stations, households, and schools were remarkably higher in components from anthropogenic sources than that from streets. It is well recognized that anthropogenic sources were affected by indoor dust. Results of pollution index of hazardous heavy metals indicated that schools, households, and subway stations were more contaminated than streets and urban areas typically had higher pollution index than rural areas. The correlation analysis among trace elements seem to suggest that there were correlations between components of soil/road dust resuspension, and components of waste incineration and fuel combustion.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2004.06a
• /
• pp.176-184
• /
• 2004

• Railway Journal
• /
• v.18 no.5
• /
• pp.50-55
• /
• 2015

• Proceedings of the KSR Conference
• /
• 2006.05b
• /
• pp.134-141
• /
• 2006