This is a new system of power generation with high efficiency and low pollution. This concerned with the flow of a conducting fluid in the presence of magnetic and electric field. The fluid may be gas at elevated temperature or liquid metal like sodium or potassium. MHD generator converts heat energy of a fuel into electrical energy without using electric generator. When an electric conductor moves across a magnetic field, a voltage is induced in it which produces an electric current.. Here gaseous conductors are used. In open cycle system, fuel used is oil. This is used through an oil tank or gasified coal through a coal gasification plant. In closed cycle system, the working fluid is circulated in a closed loop and is heated by the combustion gases using a heat exchanger. Superconducting magnets which use very little current can use here to enhance efficiency. International co-operation has been prominent in this area.
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