MHD generator

MHD generator

MHD generator, also known as plasma generator is based on the electromagnetic induction principle, with the conductive fluid,dell 0XR693 battery such as air or liquid, and the relative motion of magnetic field generating a device.
MHD power generation, is charged fluid (plasma gas or liquid) to high speed jet to the magnetic field to the use of magnetic fields generated on the role of charged fluid, which issued a call to.
The simplest open MHD generator from the combustion chamber, generating channel and magnet composition. Working process is from fossil fuel combustion in high temperature gas produced by adding potassium or sodium salt easily ionized, so that after a partial ionization, produced by the nozzle to accelerate up to 3000 degrees Celsius, the speed of 1000 m / s of high temperature and high electrical conductivity gas, and finally to generate electricity.
MHD power generation in the electric fluid, which is through heating fuel, inert gas, alkali metal vapor obtained. Thousands of degrees Celsius in temperature, these substances in the atoms and electrons are very intense exercise, and some electronic and even from the shackles of the nucleus, the results of these substances into free electrons, ions lose electrons and nuclei of the mixture, which is plasma. The plasma jet at supersonic speeds plus a strong magnetic field to a pipeline inside dell XR693 battery the plasma with positive and negative charge of the high-speed particles in the magnetic field effect by the Lorentz force, respectively, shift toward the poles, so produce a voltage between two poles, with wires to access the circuit voltage can be used.
Another advantage of MHD power generation is to produce less pollution. Using thermal energy, the emissions generated by burning fuel inside contains a lot of sulfur dioxide, which is causing a major cause of air pollution. Using the magnetic fluid power, not only at high temperature burn fuel more fully, it uses some of the added material and curing can also be combined to produce potassium sulfate, and was recycling, which avoids directly to the sulfur emissions into the air, on pollution to the environment.
Using the magnetic fluid power, as long as the speed of charged fluid jet speed, increasing the magnetic field can increase the power generator. The use of high-energy fuel, adding fast start installations, the generator can power up to 10 million kW, which meet the needs of high-power electricity some occasions. At present, China, the United States, India,dell RN873 battery Australia and the European Community are actively committed to research in this area.
MHD generator produces electromotive force, the principle of output power as shown above.
In 1959, the United States A Fuke company built the first MHD generators, power of 115kW. Since then both countries of manufacture, the Soviet Union jointly developed MHD generator U-25B in August 1978 for the fourth test, gas - plasma flow rate 2 ~ 4kg / s, temperature of 2950K, the magnetic field for the 5T , output power 1300kW, running a total of 50 hours. At present, many countries are developing the use of superconducting magnets million kilowatts of MHD.
MHD generators are manufactured in the main problem is low efficiency of power generation channel, only 10%. Channel and electrode materials require high temperature resistance, alkali corrosion resistance, chemical ablation, etc., dell GW240 battery now shorter than the life of the materials used, so long MHD generator can not run.