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PPT ON Magneto Hydro Dynamic Power Generation

Magneto Hydro Dynamic Power Generation ABSTRACT Energy generation, conservation and management are some of critical issues facing society today. However, Energy resources are finite. Increasing demand is being made for diminishing supplies. The cost of energy is enormous and the cost is rising. Proper usage of renewable energy sources is the only solutions to the problem of energy insufficiency. Non-conventional energy sources are any energy source that can be either replenished continuously or within a moderate timeframe. The use of Non-conventional energy by the industries and the public will considerably reduce the dependence on fast depleting conventional energy sources such as coal, oil etc and prevent the damage to environment. Non-conventional power sources include solar power, biomass power, wind power, hydropower, geothermal power and MHD generator. MHD generator is also one of the non-conventional energy sources which will use natural gas of air to generate power. Power generated by using MHD generator is in the range of 1000MW. This plant is also used in combined power plants not only used for generating bulk amount of power but also for increasing efficiency of the plant which is working in combined with MHD generator. It will produce pollution free power. This paper deals with working principle & construction of MHD generator, different types of MHD systems, advantages & disadvantages of MHD generator & international status of MHD system Eighty percent of total electricity produced in the world, is hydal, while remaining 20% is produced from nuclear, thermal, solar, geothermal energy and from magneto hydrodynamics (MHD) generators. In advanced countries MHD generators are widely used but in developing countries like India it is still under construction. This construction is in progress at Trichi in Tamil Nadu. The word magnetohydrodynamics (MHD) is derived as magneto- means magnetic field, and hydro- means fluid and dynamics- means movement. The field of MHD was initiated by Hannes Alfven, for which he received the Nobel prize in Physics in 1970. An MHD generator is a device used for converting heat energy of a fuel directly into electrical energy without a conventional electric generator. Magneto-hydrodynamic (MHD) electric generator works on the principle that any conductor that is moved through a magnetic field will generate electricity. This applies not only to copper wires (as in conventional generators), but also to gases, which become conductors when they are made so hot that some of their atoms separate (ionize) into electrically charged particles. A small amount of potassium chloride fed into it increases its ionization and makes it a better electrical conductor. If this gas is forced through a magnetic field, a stream of ionized gas causes an electrical current to flow across it. The gas must be so hot at least 2000 – 30000k .To heat the gas, the fuels like coal, oil, natural gas are mainly used. The thermal efficiency of an MHD converter is increased by supplying the heat at highest practical temperature and rejecting it at the lowest practical temperature. It is observed that economic and physical factors will lead to design outputs of the order of 1000MW.Infact MHD is really of interest only for central power generation. MHD generators are big enough to supply commercial power. A major advantage of MHD generator has no primary moving parts. MHD power generation is a new system of electrical power generation which has no turbine to rotate any rotor and there is no usage of copper winding.

EEE

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