magneto hydrodynamic

8/6/2019 Magneto Hydrodynamic

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Magnetohydrodynamic "dynamo" of the Sun

The Worlds Most Efficient Solar ElectricTechnologyMagnetohydrodynamic Electrical Power

Generation

Gas Energy Directly Converted Into Electrical Energy

Magneto-Hydro-Dynamics

Magnetohydrodynamics involves magnetic fields (magneto) and fluids (hydro) that conduct electricity andinteract (dynamics).

Magnetohydrodynamic (MHD) Plasma Power Plants

A Better Mousetrap For Solar

MHD Power Generation Will Play an Important Role in The Power Industry


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The Development of MHD For Electric Utility Power Generation is an Objective of National Significance

"Of all the direct energy conversion methods exploitable,

the MHD power generation seems to be the most promising for a utility system"- Power Plant Engineering - Third Edition By P.K.Nag - 2008 - 13.1

MHD Electrical Power Generator Directly Converts The Enthalpy of Gas Energy Into Electrical EnergyMHD Converts Kinetic Energy Of Energetic Fluids Into Electric Energy

The Global Demand For Energy Continues To Grow

MAGNETO HYDRO DYNAMIC (MHD) power generation represents a quantum leap in power generation.

The energy crisis has directed scientific efforts to increase the efficiency of power generation systems.MHD converts heat into electricity. Solar energy is a economical heat source. Solar thermodynamicoptimization of MHD maximizes the energy potential of focused sunlight to the highest degree possible.

Solar MHD systems help address the problems of environmental pollution.

The principle of MHD generation is simple, discovered by faraday when an electric conductor moves acrossa magnetic field, a emf. Is induced in it, which produced an electric current. This is the principle of theconventional generator also, where the conductors consists of copper strips. In a MHD generator the solidconductors of the conventional generator are replaced by a fluid conductor/gaseous conductor; i.e. anionized gas. In an MHD generator, the hot ionized gas replaces the copper windings of an alternator.


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An MHD generator, like a turbo generator, is an energy conversion device and can be used with any high-temperature heat source, nuclear, solar, etc.

Solar MHD conversion processes offer a highly efficient, clean and direct conversion of energy for powergeneration that can help fill the demand for non-polluting ways of generating electricity.

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ADVANTAGES OF MHD GENERATION - From Scrib.com

MHD generation offers several advantages as compared to other methods of electric generation.

1) The conversion efficiency of a MHD system can be 50% as compared to less than 40 percent for the mostefficient steam plants.

2) Large amount of power is generated.

3) It has no moving parts, so more reliable and mechanically elegant.

4) It has ability to reach the full power level as soon as started.

5) Because of higher efficiency, the overall generation cost of an MHD plant will be less.

6) The more efficient heat utilization would decreases the amount of heat discharged to environment andthe cooling water requirements would also be lower.

7) The higher efficiency means better fuel utilization. The reduce fuel consumption would offer additionaleconomic and social benefits.

8) The Closed cycle system produces power free of pollution.

It will not be long before MHD power generation transforms itself from non-conventional to conventionalenergy sources.

Why MHD?What are advantages* From NASA - Nagaoka University of Technology, Nagaoka, Japan

"Simple Structure

Only MHD channel (electrodes, insulator) and Magnet

High Power density --- high electric field, current density

Compact machineSmall output applicationsCeramic material can be used

High Efficiency


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Save energy resources & Low Environmental Issues

No moving parts

No turbine and no rotating generator"

Merits of MHD power generation are as follows;

1) simple structure,2) working at high-temperatures,3) high Carnot-cycle efficiency, and4) easy to realize combined cycle with other systems.- The International Conference on Electrical Engineering 2008

Solar MHD, Inc., a New York corporation, is an alternative energy company dedicated to designing, engineering anddeveloping a more competitively efficient way of generating electric power from any heat source, including solarenergy, utilizing magnetohydrodynamics (MHD) technology.

About the Founder: Thomas P. Kay, He was a solar energy consultant for Exxon Enterprises, a subsidiary of ExxonCorporation, He presently holds two solar MHD patents. Solar MHD Inc, has been developing Solar MHD systemsfor over 35 years.

Solar MHD, Inc. is developing new MHD patents and currently owns one patent (Patent No. US7,554,223 B1).

MHD technology can produce electricity from any heat source, but operates optimally by using solar energy in orderto reach peak efficiency and economy of scale. Waste heat generated by fossil fuel power stations and othersources may also be used, hence units can also be manufactured for use as topping-cycle enhancers inconventional power plants. The unique value of MHD is that it permits an older single-cycle fossil-fuel power plant tobe upgraded to high efficiency.

Solar MHD, Inc. believes that its MHD systems will significantly reduce energy costs and provide an alternative,

cost-competitive and environmentally benign alternative method of producing electricity. MHD might represent avastly more competitive way of generating electric power from any heat source and promises to be most efficient forcommercialization by using the essentially free energy of the sun.

For more information, please contact us at (845) 679-5096 - Info

MHD Faraday Generator

Solar MHD (Magneto-Hydrodynamic) Electric Generators operate more efficiently than conventional power plants.

This patented system attains very high-efficiencies and is non-polluting by using the sun to superheat a gas plasma.The plasma is then cycled into a chamber where strong magnets, because the gas is superheated, are able tocollect electrons from the gas which are then conducted away with electrodes, these electrodes serve much thesame purpose as the brushes in a conventional generator. The gas by virtue of its motion through the magnetic fieldhas an electromotive force generated in it which drives a current through it. The plasma gas recycles through thesystem, is replenished and the cycle continues.
mailto:[email protected]:[email protected]


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The distinguishing feature of a magnetohydrodynamic generator as compared to a conventional turbogenerator isthat is utilizes an ionized and, hence, electrically conducting plasma gas.

In a magnetohydrodynamic device the moving conductor (gas) is a three-dimensional continuum rather than abundle of essentially one-dimensional wires.

The Solar MHD high-electric-power system has few moving mechanical parts which means the system lasts longerthan conventional fossil fuel burnings systems and requires less maintenance over the life of the system.

All this means cleaner, cheaper, quieter power generation for businesses, residential complexes, and municipal

utilities.

The MHD cycle should provide a very high conversion efficiency, possibly approaching 70% (Cicconradi et al 1997,Kayukawa, 2000).

Parabolic dish solar energy concentrating collectors can achieve temperatures well above 2,000 degrees-F in orderto power MHD generators. Higher operating temperatures significantly increase thermal to energy efficiencies. TheSun heats the gas to temperatures sufficient for the start of thermal ionization - ionized state.

The future electrical power needs of industrial countries will have to be met for the most part by thermal systemscomposed of a heat source and an energy conversion device. In accordance with thermodynamic considerations,the maximum potential efficiency of such a system (i.e., the Carnot efficiency) is determined by the temperature ofthe heat source. However, the maximum actual efficiency of the system will be limited by the maximum temperatureemployed in the energy conversion device. The closer the temperature of the working fluid in the energy conversiondevice to the temperature of the heat source, the higher the maximum potential efficiency of the overall system.


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The maximum limiting temperature for turbine blades being 750-800C, the MHD generator is capable of tapping thevast potential offered by modern furnaces, which can reach temperatures of more than 2500 K, and up to 3000 Kwith preheating of air.

Because MHD power generators, in contrast to turbines, do not require the use of moving solid materials in the gasstream, they can operate at much higher temperatures. Calculations show that fossil-fuelled MHD generators may

be capable of operating at efficiencies between 50 and 60 percent. Higher operating efficiencies would lead toimproved conservation of natural resources, reduced thermal pollution, and lower fuel costs. Studies currently inprogress suggest also the possibility of reduced air pollution.

The last few decades have witnessed a clear trend in high temperature solar thermal electricity generation:increasing the concentration of sunlight, the operation temperature, and subsequently the efficiency of conversionfrom sunlight to electricity.

Solar MHD, technology converts solar energy to electrical energy at very high temperatures. Combined with aturbine-generator, magnetohydrodynamics systems are projected to be capable of efficiencies exceeding 60percent with no emissions.

This pursuit of ever-higher efficiency is economically motivated: sunlight is of course free.

PRINCIPLE OF MHD POWER GENERATION

MHD power generation is based on Faradays law of electromagnetic induction. When conductive fluid flowsthrough a magnetic field that is perpendicular to the flowing direction, it will cut the magnetic lines and then theelectromotive force is induced in the direction perpendicular to both magnetic field direction and flow direction.

Solar MHD will be utilizing extreme engineering and equipment to develop our proprietary technology that willexploit new materials and advanced technology. Solar MHD will also incorporate recent advancements in theefficiency of permanent magnets and new heat-resistant materials. Solar MHD power plants hold the promise torevolutionize the power industry as we know it.

During the initial phase of Solar MHD business operation we will have designed, built, and tested a solar MHD unitthat can be shown to be financially profitable to our company.

MHD Generators Are Energy Conversion Machines

MHD power generation is a very promising direct solar thermal power generation technology.


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By using solar energy the High Temperature Solar MHD Generator has the ability to achieve higher working fluidtemperatures than obtainable by combustion of common fuels (Coal, Oil, and Natural Gas). This is a key advantageto the current state-of-the-art. Temperatures of the required magnitude cannot be easily achieved by combustion ofthe usual fuels. The operating temperature range for MHD is beyond that of any other generating technology.

(MHD generator), a power generator in which the energy of the working fluid (a conductive liquid or gaseous

medium) moving through a magnetic field is converted directly into electric power. The term magnetohydrodynamicgenerator is derived from the fact that the motion of such mediums is described by magnetohydrodynamics.

The MHD power generation system has high efficiency. This is because the power generation system can workover a high temperature range of 6003000 C.

Nuclear/MHD - MHD Nuclear Reactor Power Plant

Principles Of Operation


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Magnetohydrodynamics (MHD) (magnetofluiddynamics or hydromagnetics) is the academic discipline which studiesthe dynamics of electrically conducting fluids. Examples of such fluids include plasmas, liquid metals, and saltwater. The word magnetohydrodynamics (MHD) is derived from magneto- meaning magnetic field, and hydro-meaning liquid, and -dynamics meaning movement. The field of MHD was initiated by Hannes Alfvn, for which hereceived the Nobel Prize in Physics in 1970.

The idea of MHD is that magnetic fields can induce currents in a moving conductive fluid, which create forces on thefluid, and also change the magnetic field itself. The set of equations which describe MHD are a combination of theNavier-Stokes equations of fluid dynamics and Maxwell's equations of electromagnetism. These differentialequations have to be solved simultaneously, either analytically or numerically. Because MHD is a fluid theory, itcannot treat kinetic phenomena, i.e., those in which the existence of discrete particles, or of a non-thermaldistribution of their velocities, is important.

When a gas is heated to high temperatures, the valence electrons of the excited atoms move on to higher quantizedorbits and ultimately, at certain energy levels they fly off and become free electrons, For a gas to be conducting, acertain number of free electrons must be present along with an equal number of ions and the main body of neutralatoms. The working plasma loses its enthalpy which is converted into electric power in the MHD generator. Since avery high temperature is required to ionize a gas (thermal ionization). The hot gas is seeded with an alkali metalsuch as cesium or potassium having low ionization potential before the gas enters the MHD duct.

MHD Generator - A magnetohydrodynamic generator directly extracts electric power from moving hot gases througha magnetic field, without the use of rotating electromagnetic machinery. MHD generators were originally developed


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because the output of a plasma MHD generator is a flame, well able to heat the boilers of a steam power plant. Thefirst practical design was the AVCO Mk. 25, developed in 1965. The U.S. government performed substantialdevelopment, culminating in a 25Mw demonstration plant in 1987.

The MHD (magnetohydrodynamic) generator or dynamo transforms thermal energy or kinetic energy directly intoelectricity. MHD generators are different from traditional electric generators in that they can operate at hightemperatures without moving parts. MHD was eagerly developed because the exhaust of a plasma MHD generatoris a flame, still able to heat the boilers of a steam power plant. So high-temperature MHD was developed as atopping cycle to increase the efficiency of electric generation, especially when burning coal or natural gas. It hasalso been applied to pump liquid metals and for quiet submarine engines.

The basic concept underlying the mechanical and fluid dynamos is the same. The fluid dynamo, however, uses themotion of fluid or plasma to generate the currents which generate the electrical energy. The mechanical dynamo, incontrast, uses the motion of mechanical devices to accomplish this. The functional difference between an MHDgenerator and an MHD dynamo is the path the charged particles follow.

Solar MHD Electrical Power Plant


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The Lorentz Force Law describes the effects of a charged particle moving in aconstant magnetic field.F=Q.(V x B)F is the force acting on the particle,Q is charge of particle,v is velocity of particle,B is magnetic field.The vector F is perpendicular to both v and B according to the Right hand rule.

Solar MHD Inc, Publicity:

Producing Electricity from Any Heat Source - The Next

Generation of Solar Thermal?From: Solar Thermal Magazine

Magnetohydrodynamics: The Next Generation of SolarThermal PowerFrom: Renewable Energy Magazine
http://www.solarthermalmagazine.com/2010/11/18/producing-electricity-from-any-heat-source-the-next-generation-of-solar-thermal/comment-page-1/#comment-53080http://www.solarthermalmagazine.com/2010/11/18/producing-electricity-from-any-heat-source-the-next-generation-of-solar-thermal/comment-page-1/#comment-53080http://www.renewableenergymagazine.com/energias/renovables/index/pag/thermal/colleft/colright/thermal/tip/articulo/pagant/thermal/pagid/12797/botid/72http://www.renewableenergymagazine.com/energias/renovables/index/pag/thermal/colleft/colright/thermal/tip/articulo/pagant/thermal/pagid/12797/botid/72http://www.solarthermalmagazine.com/2010/11/18/producing-electricity-from-any-heat-source-the-next-generation-of-solar-thermal/comment-page-1/#comment-53080http://www.solarthermalmagazine.com/2010/11/18/producing-electricity-from-any-heat-source-the-next-generation-of-solar-thermal/comment-page-1/#comment-53080http://www.renewableenergymagazine.com/energias/renovables/index/pag/thermal/colleft/colright/thermal/tip/articulo/pagant/thermal/pagid/12797/botid/72http://www.renewableenergymagazine.com/energias/renovables/index/pag/thermal/colleft/colright/thermal/tip/articulo/pagant/thermal/pagid/12797/botid/72


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Related Links:

Bookrags - Magnetohydrodynamics Preliminary Study On Next Test Facility For Closed Cycle MHD - Efficiency As High As

55%

Solar MHD Benchmark Experiments - Hughes Space and Communications Company physicist, J. Palmer'sproved in the 1970's that solar energy can ionize a plasma. This proved the concept that solar MHD electricpower generation works.

High Efficiency Closed Cycle MHD Power Generation System- MHD single power generation system had the highest plant efficiency of 61 percent! which was higherthan that of a conventional turbine generation system.

"I became aware of MHD in the mid 1970's. I thought it has wonderful petential... It definately deserves to be part ofthe future of energy. Keep up the good work!!!" - R McFall

"I was the Air Force program manager for the Hypersonic Vehicle Electric Power program which was the last MHD

research program funded by the government. This program sucessfully tested an MHD generator powered by ascramjet combustor. Your idea of using solar concentrators to provide the high temperature is very interesting." -Rene T

"I worked on large scale MHD project NASA/US Navy--at the Cleveland Center. To prove the system works in saltwater--passing threw MHD units--to dive silent electric drive units for both subs--and commercial vessels--in thefuture. Thanks--bring back old fun days -pure math & physics--love of my life" - M Castro

"Any & all Inventions &/or Innovations towards higher Efficiency at lesser KW Cost should be welcome news. Ifready for commercialization, we would be an early adaptor of this technology" - Ernesto Del Castillo - Energy &Utilities Network

"Based on the facts known concerning MHD devices it can be said that in general everybody would have to agreethat a device, as described herein, can be built and usefully operated." - DR R Shider - Ph.D.

Solar MHD, Inc.

For more informationplease contact us at (845) 679-5096
http://www.bookrags.com/research/magnetohydrodynamics-mee-02/http://mhd.ing.unibo.it/Old_Proceedings/1992_Beijing/Beijing%201992/VOLUME4/Vol4Cap01.pdfhttp://mhd.ing.unibo.it/Old_Proceedings/1992_Beijing/Beijing%201992/VOLUME4/Vol4Cap01.pdfhttp://www.aric.or.kr/treatise/journal/content.asp?idx=43541http://www.bookrags.com/research/magnetohydrodynamics-mee-02/http://mhd.ing.unibo.it/Old_Proceedings/1992_Beijing/Beijing%201992/VOLUME4/Vol4Cap01.pdfhttp://mhd.ing.unibo.it/Old_Proceedings/1992_Beijing/Beijing%201992/VOLUME4/Vol4Cap01.pdfhttp://www.aric.or.kr/treatise/journal/content.asp?idx=43541

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