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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 mhd 2005 1 12 13

u Faradayの誘導起電力の法則とMHD発電

第13・14回/ 2005.1.12, 13


.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


Faraday
.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


.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.


.MHD発電の発想

20 mV

V

Waterloo Bridge

B

J

u

d

Thames river


.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


.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


U mhd

uMHD発電機の電気的特性


1.MHD発電機の等価回路



Continuous electrode faraday generator
.Continuous electrode Faraday generator

electrode


Segmented electrode faraday generator
.Segmented electrode Faraday generator

electrode


Hall generator
.Hall generator

short circuit


U mhd1

uMHD発電機の流体力学的特性


Electrode connections for linear mhd generators
.Electrode connections for linear MHD generators

electrode

insulated wall


Closed cycle mhd power generation system

3

4

1

2

2.Closed cycle MHD power generation system

Adiabatic efficiency


ad