magnetohydrodynamic power generator

Introduction
Principles of operation
Major types of MHD systems
- Coal-fired MHD systems
- Other MHD systems
Development of MHD power generators

References & Edit History Quick Facts & Related Topics

Images

Comparison of the operating principles of (A) a turbogenerator and (B) an MHD generator.

Simple MHD generatorThe load current is represented by I and the voltage by V.

MHD generator configurations(A) Segmented Faraday generator. (B) Hall generator. (C) Diagonal generator. (D) Disk generator.

Quizzes

Electric power lines against sunset (grid, power, wires, electrical, electricity)

Energy & Fossil Fuels

Related Questions

How can a coal-fired MHD system reduce sulfur dioxide emissions?
How can an MHD coal plant reduce nitrogen oxide emissions?
How can coal slag protect the channel walls in an MHD generator?
How could MHD generators provide power for spacecraft and deep-space probes?
How could solar concentrators supply heat for an MHD generator?
How did Bela Karlovitz contribute to the development of MHD generators?
How did Humphry Davy show that a magnetic field could affect an electric arc?
How did seeding a working gas help early MHD experiments generate electricity?
How do gas velocity and magnetic-field strength affect MHD generator power output?
How do pulsed MHD generators create short bursts of electrical power?
How does Faraday’s law of induction apply to a magnetohydrodynamic generator?
How does a Faraday generator handle the Hall effect?
How does a Hall generator produce output current?
How does a disk MHD generator differ from a linear Hall generator?
How does a magnetohydrodynamic power generator produce electricity?
How does an MHD generator convert the kinetic energy of hot gas directly into electric energy?
How does higher operating temperature affect the efficiency of an MHD power plant?
How does the Hall effect affect a plasma MHD generator?
How does the direction of gas flow affect the electric field in an MHD generator?
How does the efficiency of an MHD power plant compare with that of a conventional power plant?
How fast does gas travel through the channel of a magnetohydrodynamic generator?
How have pulsed MHD generators been used in geophysical research?
How hot must plasma be to conduct electricity effectively in an MHD generator?
How much power did Richard J. Rosa’s MHD generator produce?
How strong is the magnetic field used in a typical MHD generator?
What are the main parts of a magnetohydrodynamic generator?
What do topping and bottoming mean in a coal-fired MHD power plant?
What maximum efficiency can an MHD power system potentially achieve?
What role does the nozzle play in a magnetohydrodynamic generator?
Which seed materials can be used in magnetohydrodynamic power generation?
Who conducted the first recorded investigation related to magnetohydrodynamics?
Who operated the first successful magnetohydrodynamic generator in 1959?
Why are electrodes placed along the channel walls of an MHD generator?
Why are liquid-metal MHD systems limited to lower temperatures than plasma MHD systems?
Why are liquid metals considered for use in MHD generators?
Why did MHD research decline during the late 1960s?
Why did the energy crisis of the 1970s renew interest in coal-fired MHD systems?
Why do MHD generators often use superconducting magnets?
Why do electrons create a Hall field inside an MHD generator channel?
Why does a liquid-metal MHD generator need a driving gas or vapor?
Why does a magnetohydrodynamic generator use an ionized gas or plasma?
Why does power generation decrease as gas cools in a coal-fired MHD duct?
Why have high construction costs limited the use of MHD power generators?
Why is a disk generator useful with nonequilibrium ionization?
Why is a seed material added to the hot gas in an MHD generator?
Why is electrical conductivity important in a magnetohydrodynamic generator?
Why is potassium often preferred over cesium as a seed material in MHD generators?
Why must seed material be recovered in an MHD power plant?
Why would nuclear-reactor MHD systems need nonequilibrium ionization?

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External Websites

International Journal of Scientific and Research Publications - Magneto hydrodynamic Power Generation

magnetohydrodynamic power generator

physics

Also known as: MHD generator, MHD power generator

Written by

G. Ralph Strohl

Director, Research Department, Development Office, University of Chicago. Author of "The Ephemeral and the Immortal" in India and Greece: Connections and Parallels.

G. Ralph StrohlAll

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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....

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History

magnetohydrodynamic power generator, any of a class of devices that generate electric power by means of the interaction of a moving fluid (usually an ionized gas or plasma) and a magnetic field. Magnetohydrodynamic (MHD) power plants offer the potential for large-scale electrical power generation with reduced impact on the environment. Since 1970, several countries have undertaken MHD research programs with a particular emphasis on the use of coal as a fuel. MHD generators are also...