• Title/Summary/Keyword: MHD발전

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Studies on a Effective Scheme to Obtain High Temperature Working Plasma for MHD Power Generation (MHD발전용 작동 플라즈마를 고온가열하기 위한 효율적 방안에 관한 연구)

  • 김윤식;노창주;김영길;공영경;최춘성
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.17 no.1
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    • pp.153-161
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    • 1993
  • Heat transfer processes in the combustion chamber of a pebble bed regenerative heat exchanger for MHD power generation has been analyzed numerically for heating, evacuation argon heating periods individually. The calculated result well explain the measured temperature change at the top of the pebble bed. The analytical result point out that the length of evacution period and the geometry optimization both for the combustion chamber and the heat storage bed are very important factors for the improvement of thermal performance in MHD power generation.

MHD 발전기술

  • 최수현
    • 전기의세계
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    • v.35 no.10
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    • pp.628-634
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    • 1986
  • 전력은 우리생활에서의 필수요소로서 그 수요가 지속적으로 증가되고 있는 반면에 기존화력 발전기술은 기술적으로 효율향상에 한계가 있기 때문에 고효율의 새로운 발전기술의 개발이 절실히 요구되고 있다. 여기서는 대체발전기술로서 선진국에서 적극 개발되고 있는 MHD발전기술에 대하여 살펴보았다. 국내에서의 본격적인 연구는 전무한 상태이나 기초연구를 통한 기술축적이 절실히 요구되는 분야이며 선진국에서의 기술개발 동향을 계속 추적분석할 필요가 있겠다.

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A evaluation of internal radial direction's distribution of MHD generator using shock tube (충격파관을 이용한 MHD발전기 내부 반경방향 분포의 평가)

  • 배철오;안병원;김윤식;이성근;박영산
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.4 no.2
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    • pp.493-503
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    • 2000
  • There are two types of generators in the MHD generation : linear type Faraday and disk type hall generator. In this paper, it is experimented disk type hall generator. Disk type generator is driven by shock tube that compresses working gas isentropically in a very short time. As a working gas, helium gas seeded with cesium is used. it is difficult to confirm the whole condition thorough oかy experiment because the things happened in MHD generator is very complex. Furthermore we can't how exactly what happen at the inside of generator's channel because the time of generation is very short and working gas flows out very high speed. Expecially it is almost impossible to measure the things occurred in the boundary layer using MHD generation experimental equipment driven shock uk. With above reasons, to know certainly how the several values happened inside disk MHD generator charge, some graphs were drawn linearly through calculation using measured experimental data. For the more, other calculated results which can't be obtained by only experiment are considered in this paper. And these calculated results are compared to experiment data how exactly done the calculation.

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A Study on the Disk Type MHD Generator Using a Shock Tube (충격파관을 이용한 DISK형 MHD발전기에 관한 연구)

  • 배철오;신명철;김윤식;길경석
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.3 no.2
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    • pp.447-453
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    • 1999
  • In MHD power generation system, enthalpy of the working gas is convened to electric power directly through expansion in generator channel. It means that electric power can be generated without a moving mechanical linkage such as turbine blades. The principle of MHD generation is based on Faraday'law of induction that eletromotive force(u$\times$B) is generated when the working gas of velocity u flows a channel in which magnetic field of strength(B) exists. In this paper, helium gas seeded with cesium is used as working gas. There are two types of generator in MHD generation; linear type faraday and disk type hall generator. Rogowski coils having the bandwidth of the 100(Hz) ~ 20(kHz) were used for measuring current flowing MHD disk channel. Optimum load resistor value of the MHD generator studied was 2.5[$\Omega$]. Disk type hall generator's generation performance is the main target of this paper, which superiors to linear type Faraday generator in many points. Isentropic efficiency and enthalpy extraction rate of disk type shock tube driven hall generator is discussed here.

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Plasma 개설

  • 성영권
    • 전기의세계
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    • v.19 no.2
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    • pp.24-28
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    • 1970
  • "Plasma"라는 말이 전기, 전자, 통신공학 등은 물론 기계공학, 우주공학, 원자력공학등 여러분야에서 화제로 되고 특히 새로운 에너지원의 개발이라는 견지에서 대단히 중요한 과제로 등장하고 있다. 예를 들어 MHD발전을 본다면 종합능률이 이론적으로 70%이상에 달하고 실용적으로도 55-60%의 고능률(최신예 화력발전이라도 40%정도)이 기대되는것에서 대출력발전에 이용하고저 제법 급속히 실용화에의 연구가 진행되고 있다. 따라서 본구에서는 이러한 plasma가 지니는 여러가지 과제의 전망과 이들에 공통한 plasma물성의 기초를 전기공학과 관련시켜 알아보고자 한다. 알아보고자 한다.

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MHD 발전기술

  • Sim, Seong-Hun;Jeong, Sang-Hyeon;Park, Seong-Je
    • 기계와재료
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    • v.17 no.2 s.64
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    • pp.83-93
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    • 2005
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