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SEMINAR TOPICS CATEGORY


Magneto Hydro Dynamic Power Generation

Added on: February 1st, 2017 by Afsal Meerankutty No Comments

When an electrical conductor is moved so as to cut lines of magnetic induction, charged particles in the conductor experience a force in a direction mutually perpendicular to the B field and to the velocity of the conductor. The negative charges tend to move in one direction, and the positive charges in the opposite direction. This induced electric field, or motional emf, provides the basis for converting mechanical energy into electrical energy. In conventional steam power plants, the heat released by the fuel is converted into rotational mechanical energy by means of a thermo cycle and the mechanical energy is then used to drive the electric generator. Thus two stages of energy conversion are involved in which the heat to mechanical energy conversion has inherently very low efficiency.

Also, the rotating machine has its associated losses and maintenance problems. In MHD generation, electrical energy is directly generated from hot combustion gases produced by the combustion of fuel without moving parts. The conventional electrical machines are basically electro mechanical converters while an MHD generator is heat engine operating on a turbine cycle and transforming the internal energy of gas directly into electrical energy.

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