• 제목/요약/키워드: 정우성

검색결과 471건 처리시간 0.032초

미세수소기포를 이용한 환기 터널내의 연기거동 모사 (Simulation of smoke movement in a ventilated tunnel by using fine hydrogen bubbles)

  • 박원희;이한수;장용준;정우성
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 춘계학술대회 논문집
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    • pp.1768-1772
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    • 2008
  • The authors previously presented that the experimental technique using fine bubbles generated by electrolysis simulated fire behavior in a tunnel. We improve this experimental setup to enable this to be considered tunnel-ventilation by circulation of salt water. In this paper we introduce the new experimental setup and the visualization of fine hydrogen bubbles simulated smoke in a ventilated tunnel by using a laser sheet are presented.

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철도차량용 전선의 화재안전기준 조사 (Study on the cable fire test for Train)

  • 이덕희;이관섭;정우성;이철규
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 춘계학술대회 논문집
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    • pp.1119-1124
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    • 2008
  • Defect of the Cable is one of the most frequent cause of fire accident for years. It also take a big part of the fire load for train. In this study, we reviewed the standard code of other countries for cable fire test. Oxygen index, flame propagation test, smoke test and toxicity test codes were investigated. We also suggest the our national code for train cables.

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CFD를 이용한 객실 내 음이온 발생기 설치위치 결정 (Determination of Installation Point for Negative-Ion Generator in Passenger Room using by CFD)

  • 이주열;박덕신;정우성;김동술
    • 한국대기환경학회:학술대회논문집
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    • 한국대기환경학회 2002년도 추계학술대회 논문집
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    • pp.344-345
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    • 2002
  • 철도차량은 고속으로 운행되므로 승객의 안전을 위해 객실 창문의 개폐가 불가능하게 되어 있다. 객실은 전체가 밀폐되어 자연환기가 아닌 공조시스템만으로 공기 질이 조절 가능하다. 철도는 주로 장거리 승객이 이용하며, 다수의 승객은 한정된 공간에서 장시간 체류하면서 객실 내에서 발생되거나 외부에서 유입되는 각종 대기오염물질에 노출되고 있다. (중략)

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철도차량용 FRP 내장재의 화재안전성 평가 (Fire Safety Characteristics of the FRP composites for railcar)

  • 이덕희;정우성;김용기;김선옥
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2002년도 추계학술대회 논문집(II)
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    • pp.962-968
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    • 2002
  • In this study we reported the Smoke Density, the Toxicity, the Flame Spread Characteristics and the Oxygen Index of the FRP composite interior panels for raicars. Also investigated the test codes of the concerning items of other countries. We made some samples to the variance of resin types, surface finishing methods and panel shapes. It's not the really used ones but may help us effectively to guess the fire safety characteristics of railcars.

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객차용 고효율 항균 기능성 필터에 관한 연구 (A Study of high Efficiency anti-Bacteria Filters for Passenger Car)

  • 정우성;박덕신;정진도;류해열
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2002년도 추계학술대회 논문집(II)
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    • pp.975-980
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    • 2002
  • We actually installed antibacterial air filter on the air intake route to air conditioner in passenger car and evaluated filters performance on antibacterial effect. And also, antibacterial effect was observed at whole are of filter media by zone of inhibition test. In the evaluation of antibacterial test, it was shown that the air filter has notably sufficient antibacterial efficiency against ordinary filter.

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지하전철구간 전기부식 특성에 관한 기초연구 (A Preliminary Study on the Electric Corrosion at Electrified Railroad)

  • 이철규;정우성;이덕희
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2004년도 추계학술대회 논문집
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    • pp.151-156
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    • 2004
  • Although insulation equipment is installed, it is inevitable to avoid the stray current because rail is the return way of the direct current that is power of electric motor car. In this paper, by the investigation of the present state of underground facilities, and looking into the reason of electric corrosion, and analysis of corrosion accident cases of inside and outside of the country, fundamental data, to reduce of stray current and to prevent electric corrosion, were accumulated to enhance the safety of railway operation service.

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전동차내 쾌적성 평가에 관한 기초연구 (A Basic Study on Evaluation of Comfortableness in Electric Rolling Stock)

  • 박덕신;이주열;정우성
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2002년도 추계학술대회 논문집(II)
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    • pp.954-961
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    • 2002
  • Ventilation system on passenger rooms should be designed for the health and comfort of the passengers. One of the main aim is to create an acceptable thermal environment without draught problems. The draught sensation increases when the air temperature decreases and the air velocity increases. Airflow in passenger rooms is turbulent. Lateral temperature and humidity gradients in the electric rolling stock have been studied. And, the difference in the mean temperatures measured at 0.7, 0.9, 1.2, 1.7 m above the floor. It has been found that temperature with large fluctuations caused more draught complains.

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제올라이트를 이용한 철도차량 내장재의 항균특성 연구 (Antimicrobial characteristics study of interial material of railway vehicle used zeolite)

  • 이철규;이덕희;정우성;신동철
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2004년도 추계학술대회 논문집
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    • pp.200-204
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    • 2004
  • It is social demands that we are now wanting to be more cozier and clean by the enhancement of the living standard recently. Antimicrobial is essential to the interior materials to prevent bacteria from spreading through passenger using the electric railway called environmentally friendly. In this paper, ion exchanged zeolite was added to the unsaturated polyester resin reinforced glass fiber. To investigate the animicrobial performance. Staphylococcus aureus and Escherichia coli was used according to the FC TM-20-2003 method.

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