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전력산업기술정보

  • Korea Electric Association
    • JOURNAL OF ELECTRICAL WORLD
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    • s.349
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    • pp.59-59
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    • 2006

  • 대한전기협회에서는외국자료를수집하여한전전력연구원전력정보센터에매월제공하고있습니다. 전력정보센터에제공된외국의전기기술및 전기계의동향에관한자료를독자여러분들에게 간단히소개합니다. 자세한내용은전력정보센터( w w w . e p i c . o r . k r / ) 의 해외저널/기술문헌을참고하시기바랍니다.

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A study on the formation and properties of TMDSO/$O_2$ thin film by the RF Plasma CVD (RF Plasma CVD에 의한 TMDSO/$O_2$의 합성과 박막의 특성에 관한 연구)

  • Kim, I.S.;Kim, G.Y.;Kang, D.P.;Yun, M.S.;Park, S.H.
    • Proceedings of the KIEE Conference
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    • 1991.11a
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    • pp.265-268
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    • 1991

  • In the study, PPTMDSO(plasma-polymerized tetramethyldisiloxane) films were deposited on on glass substrate in a paralled plate reactor. As the function of RF power increased from 20 W to 110 W, and the substrate temperature increased from $25^{\circ}C$ to $100^{\circ}C$, the deposit ion rate, increased. When oxygen was intentionally added in monomer vapor, the concentration of Si-O-Si bonds increased while C-H, Si-H, -CH3, Si(CH3)x, -CH3, and Si-C bonds decreased in IR spectra. Thermal stability of PPTMSDO film were investigated and weight loss at $800^{\circ}C$ was 7.3 %.

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A study on the spray combustion characteristics of D.I. diesel engine using visualization engine system (가시화 엔진을 이용한 직분식 디젤 엔진의 분무 연소 특성에 관한 연구)

  • Chung, J.W.;Lee, K.H.;Choi, S.W.;Kim, B.S.
    • Journal of ILASS-Korea
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    • v.4 no.4
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    • pp.17-23
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    • 1999

  • Recently, many researchers have been studied a D.I. diesel engine because of the exhaust gas restriction and fuel consumption performance. It is well known that the fuel injection characteristics are the key factors on the diesel combustion and exhaust emission. In this study, the fuel injection characteristics of 5-hole injector and the combustion characteristics are investigated with the amount of fuel by means of the visualization method and visualization D.I. diesel engine system. As the results of the experiments, the spray pattern of the fuel injection and the diffusion flame of a D.I. diesel engine are clarified. In addition, combustion phenomena with operation conditions such as engine speed and engine load are made clear.

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Performance Evaluation of Class I SPD Using $10/350{\mu}s$ Surge Current ($10/350{\mu}s$ 서지전류를 이용한 I 등급 SPD의 성능평가)

  • Cho, Sung-Chul;Eom, Ju-Hong;Lee, Tae-Hyung
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.1466-1467
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    • 2007

  • A new parameter W/R for the class I test have been introduced in the IEC 61643-1 published in 2005. One of the possible test impulses which meets the parameters for class I test is the 10/350 [${\mu}s$] waveshape proposed in IEC61312-1. 10/350 [${\mu}s$] waveshape meets parameters for class I test in the IEC 61643-1. The impulse generator for making the 10/350 [${\mu}s$] waveshape is consist of IVG, ICG, crowbar coil and crowbar switch. The electric change Q and the specific energy W/R were measured and calculated using the exclusive use measuring software according to the formula of IEC 611643-1. We verified the correspondence between measured results using impulse generator and recommended parameters by IEC 61643-1.

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