Evaluation of Early Suppression-Fast Response (ESFR) Sprinklers in Facilities and Residences for Elderly People

최영상,공예린,공하성 한국화재소방학회 2015 한국화재소방학회논문지 Vol.29 No.4

This study compared, through a fire simulation, temperature changes of the smoke layer and the air layer, and heightfluctuations of the smoke layer, according to the sprinkler head installation and non-installation, and the sprinkler headtypes in elderly-care facilities. When a standard response sprinkler worked, the radiant heat exceeded the conditions forthe occurrence of flashover. However the ESFR sprinkler prevented flashover. When the early response head worked,inhabitants were not damaged by radiant heat because the maximum value of the heat flux remained 2,293W/m2, whichis less then the burn hazard criterion of 4,000W/m2. The highest temperature of the room when fire occurred exceededthe safety standard in all of the smoke layer and the air layer, but the highest temperature was kept below the safety standardafter it fell down rapidly. Because the height of the smoke layer was maintained above 1.1 m when the earlyresponse sprinkler worked, the falling of the smoking layer was much more delayed than in the case where the standardresponse sprinkler was used.

출입구의 문 설치가 피난에 미치는 영향

최영상,전흥균 대구보건전문대학 2007 대구보건대학 論文集 Vol.27 No.-

This study was performed to find the influence of evacuation by door install at the four emergency exit of Banwalldang station which is one of the subway station of Daegu City The influence of evacuation was calculated by using a simulation program SIMULEX. The simulation was done about two case without and with door at the same emergency exit with 300 and 400 evacuation population. No evacuation time difference was observed when 300 evacuation population were adapted. Only 19 sec evacuation time difference were observed when 400 evacuation population were adapted to the same conditions. By using this results to install door at the four exit is possible but the followings are suggested. The first, the sliding door should be operating by the signal of fire detector and keep open when the fire. The second, to lead the evacuees well to the escape route the luminaries for emergency exit sign have to be added to the wall and floor around the emergency exit. The third, besides above suggestions devote all effort to prevent fire at the subway station and arcade.

buildingEXODUS를 이용한 유치원 건물의 화재안전해석

최영상,박종탁 대구보건대학 2009 대구보건대학 論文集 Vol.29 No.-

신품종 번데기동충하초『예당 3호』육성 및 특성

최영상,김홍규,이병주,김용균 한국버섯학회 2009 한국버섯학회지 Vol.7 No.4

Single ascospores was isolated in Yesan-gun, Chungnam in 2006 with Cordyceps militaris. This study was carried out to select the superior isolates which produce more fruiting body and contain more cordycepin contents. Five single ascospore isolates were cultured on brown rice pupae medium and they formed fruiting bodies. To select better isolates, each isolates was hybridized and then the characteristics and cordycepin contents were investigated. After biological efficiency and codycepin contents were examined, finally C0601S05 was selected. Top-cross test of isolate C0601S05 was carried with 29 single ascospores. From this test, isolate C0601S05×C0601S33 and isolate C0601S05×C0601S43 containing highest cordycepin contents were selected. Codycepin contents of C0601S05 was 246mg% and those of C0601S05×C0601S33 and C0601S05×C0601S43 were 325mg% and 280mg%, respectively. C0601S05×C0601S33 was registered as Yedang 3 at the Korea seed & variety service.

주택형화재경보기 작동에 따른 피난안전해석

최영상,전흥균,백열선 한국화재소방학회 2011 한국화재소방학회논문지 Vol.25 No.6

This study was performed to analysis the influence of smoke alarm detector on evacuation safety in housing fire. The analysis was conducted by CFAST fire simulation program and building EXODUS evacuation program. The effects of the earlier response time on evacuation safety were investigated by using evacuation simulation program with several steps of different response time and smoke alarm activation time for 4 occupants. The smoke detecter was activated 37.1 second after fire. The first two mortuary were occurred for 170 seconds of response time at the end of living room near exit. But for the 37.1 seconds of response time 4 occupants evacuated safely. From this study, the fire alarm detector is more important for safety evacuation in housing fire. 야간의 주택화재는 피난개시의 지연으로 인명피해 위험이 높아지게 된다. 따라서 주택용화재경보기를 설치하여 조기에 화재경보를 해주어 피난개시시간을 단축시킬 때의 피난안전을 해석하였다. 주택을 연구의대상 건물로 하여 CFAST를 사용해서 화재특성과 화재경보기 작동시간을 분석하였고, 이를 building EXODUS의 위험인자로 사용하여 4인 가족에 대한 피난시뮬레이션을 하였다. 피난개시시간을 다르게 하였을 때 170초에 피난을 개시한 경우 최초 사망자가 발생하였으나 주택용화재경보기작동시간 37.1초를 피난개시시간으로 한 경우는 안전한 피난이 되었다. 해석결과 주택용화재경보기를 설치할 경우 주택화재로부터 인명과 재산피해를 줄이는데 효과가 있다고 판단하였다.

차세대 원전 설계 기술 선도 -한전 전력연구원 신형원전개발센터

최영상 한국원자력산업회의 1998 원자력산업 Vol.18 No.5

차세대 원자로 기술 개발 사업 -추진 경위$\cdot$단계별 실적 및 주요 설계 특성-

최영상,조성제,정동욱,한상길 한국원자력산업회의 2001 원자력산업 Vol.21 No.12

차세대 원자로 기술 개발

최영상 한국원자력산업회의 2000 원자력산업 Vol.20 No.4

다공벽을 이용한 충격파 강도의 피동제어

최영상,권순범,조철영,Choe, Yeong-Sang,Gwon, Sun-Beom,Jo, Cheol-Yeong 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.1

A shock wave, being an irreversible process, gives rise to entropy increase. A great deal of effort has been made to control shock wave and boundary layer interaction related to energy losses as well as problems of vibration and noise. In the present study, tests are performed on a roof mounted half circular arc in an indraft type supersonic wind tunnel to evaluate the effects of porosity, length and depth of cavity in passive control of shock wave on the attenuation of shock strength by reviewing the measured static pressures at the porous wall and cavity. Also the flow field is visualized by a Schlieren system. The results show that in the present study the porosity of 8% produced the largest reduction of pressure fluctuations and that for the same porosity, the strength of shock wave decreases with the increasings of the depth and length of cavity.

지하상가 출입구 방풍문 설치에 따른 피난안전해석

최영상,전흥균,추홍록 한국화재소방학회 2009 한국화재소방학회논문지 Vol.23 No.3

This paper presents a study on the evacuation analysis in underground arcade. In this study, the effect of the exit with a windbreak door has been investigated by using evacuation simulation program (buildingEXODUS). Also, the simulation has included the impact of smoke, heat and toxic gases by fire simulation program (CFAST). The results were obtained for the conditions of without and with door of the two exit with 1,088 evacuation population. As a results, for non-fire evacuation, there was only a little difference of evacuation time for both conditions. However, for fire emergency evacuation, the evacuation time for the condition with door increased more 110 seconds than for the condition without door. When the auto door not opened, the evacuation time was increased more 670 seconds than for the condition without door. Consequently, in case of fire, the automatic door should be operating by the signal of fire detector and keep open when the fire accidents. To lead the evacuees well to the escape route the luminaries for an emergency exit sign have to be reinforced to the wall and floor around the exit. 지하상가는 특성상 출입구에 문을 설치할 경우 피난안전에 미치는 영향을 더 면밀하게 분석할 필요가 있다. 본 연구에서는 이미 사용 중에 있는 지하상가의 출입구 중 일부 출입구에 문을 설치하는 경우에 대해 CFAST로 화재시뮬레이션을 수행하고 그 결과를 building EXODUS 피난시뮬레이션의 위험인자로 활용하여 화재위험을 고려한 피난해석을 하였다. 지하상가의 6개 출입구 중에 2곳에 문을 설치할 경우에 대해 화재피난과 일반피난으로 나누어 1,088명에 대해 피난해석을 하였다. 일반피난의 경우는 문 설치에 따른 영향이 거의 없었으나 화재피난의 경우는 문 설치로 인해 약 110초의 피난지연이 발생하였다. 또 자동문이 설치된 경우는 자동문이 열리지 않을 때가 문 설치 전보다 670초 피난지연이 발생하였다. 따라 서 자동문은 화재감지기와 연동하여 개방된 상태로 정지하도록 설치되어야 하고, 문을 설치할 경우 피난 안전을 위해 피난유도표시를 보강하는 것도 필요하다.