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u F araday の誘導起電力の法則 と MHD 発電 第13・14 回 / 2005.1.12, 13 PowerPoint PPT Presentation


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u F araday の誘導起電力の法則 と MHD 発電 第13・14 回 / 2005.1.12, 13. 1 .電磁誘導の実証実験. Faraday の実験. J. 環状の軟鉄に巻かれた 2 組のコイル. 電流→磁場 H.C. Orsted, 1820 磁場→電流?. 1831.8.29 電磁誘導の発見. electromagnetic induction. 2 . Faraday の誘導起電力の法則. v 磁束と誘導電場との関係に注目して定式化. C. Faraday’s law of induction. J. B. 3 . 発電機の原理.

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u F araday の誘導起電力の法則 と MHD 発電 第13・14 回 / 2005.1.12, 13

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u Faradayの誘導起電力の法則とMHD発電

第13・14回/ 2005.1.12, 13


1.電磁誘導の実証実験

Faradayの実験

J

環状の軟鉄に巻かれた2組のコイル

電流→磁場

H.C. Orsted, 1820

磁場→電流?

1831.8.29 電磁誘導の発見

electromagnetic induction


2.Faradayの誘導起電力の法則

v磁束と誘導電場との関係に注目して定式化

C

Faraday’s law of induction


J

B

3.発電機の原理


4.導電性流体を利用した発電

J

Magnetohydrodynamic(MHD) Power Generation


The current is collected by a pair of electrodes

5.MHD発電の原理

  • Charged particles will experience an induced electric field u×B.

  • This field drives an electric current in the direction perpendicular to both u and B.


6.MHD発電の発想

20 mV

V

Waterloo Bridge

B

J

u

d

Thames river


7.MHD発電の発展

vMHD発電を実現させるための技術革新

  • Working substance

    • Ionized gas (plasma) flow

  • Gas velocity

    • Supersonic flow

  • Magnetic field

    • Superconducting magnet


8.プラズマの生成法

photoionization

cathode

anode

impact ionization

thermal ionization


9.MHD発電の熱力学的サイクル


uMHD発電機の電気的特性


1.MHD発電機の等価回路


2.電流密度の定義


3.Continuous electrode Faraday generator

electrode


4.Segmented electrode Faraday generator

electrode


5.Hall generator

short circuit


uMHD発電機の流体力学的特性


1.Electrode connections for linear MHD generators

electrode

insulated wall


3

4

1

2

2.Closed cycle MHD power generation system

Adiabatic efficiency


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