What are the materials used in MHD generator?

What are the materials used in MHD generator?

The development and suitability of the different potential electrode and insulator materials such as lanthanum chromite, zirconia-based materials, alumina, magnesia etc. are reviewed with particular reference to the mhd channel materials programme in the mhd Project atbarc.

What are the methods of MHD power generation?

MHD generator configurations(A) Segmented Faraday generator. (B) Hall generator. (C) Diagonal generator. (D) Disk generator.

Which of the following is used as a seeding material in a MHD power generation unit?

Open Cycle MHD System Coal is first processed and burnet in the combustor at a high temperature of about 2700oC and pressure about 12 ATP with pre-heated air from the plasma. Then a seeding material such as potassium carbonate is injected to the plasma to increase the electrical conductivity.

What is seeding in a magnetohydrodynamic energy converter?

The seed material, generally potassium carbonate, is injected into the combustion chamber, the potassium is then ionized by the hot combustion gases at temperatures of roughly (2300 to 2700°C). Thus, the gas emerges from the nozzle and enters the MHD generator unit at a high velocity.

How does a magnetohydrodynamic generator work?

A magnetohydrodynamic generator (MHD generator) is a magnetohydrodynamic converter that utilizes a Brayton cycle to transform thermal energy and kinetic energy directly into electricity. An MHD generator, like a conventional generator, relies on moving a conductor through a magnetic field to generate electric current.

What is magnetohydrodynamic effect?

The Magnetohydrodynamic (MHD) Effect is a physical phenomenon describing the motion of a conducting fluid flowing under the influence of an external magnetic field.

What is the function of nozzle in MHD generator?

In this model, the diesel exhaust flowing from the plants combustion chamber passes through a convergent and divergent nozzle before entering the MHD system (Fig. 5). The purpose of the nozzle is to accelerate the fluid velocity up to the required Mach number.

What is magnetohydrodynamic model?

Magnetohydrodynamics (MHD; also magneto-fluid dynamics or hydromagnetics) is the study of the magnetic properties and behaviour of electrically conducting fluids. Examples of such magnetofluids include plasmas, liquid metals, salt water, and electrolytes.

What are magnetohydrodynamic waves?

Magnetohydrodynamic waves are propagating disturbances found in electrically conducting fluids permeated by magnetic fields where magnetic tension provides a restoring force on fluid parcels moving across field lines.

How does a magnetohydrodynamic power plant generate electricity?

Magnetohydrodynamic power generator, any of a class of devices that generate electric power by means of the interaction of a moving fluid (usually an ionized gas or plasma) and a magnetic field. Magnetohydrodynamic (MHD) power plants offer the potential for large-scale electrical power generation with reduced impact on the environment.

Can a magnetohydrodynamic generator be used in a nuclear reactor?

A magnetohydrodynamic generator might also be the first stage of a gas-cooled nuclear reactor. Material and design issues MHD generators have difficult problems in regard to materials, both for the walls and the electrodes. Materials must not melt or corrode at very high temperatures.

What is the density of a magnetohydrodynamic power generator?

Theoretically, an MHD system with a gas conductivity of 25 siemens per metre, an average magnetic field of three teslas, and an average gas velocity of 1,000 metres per second is capable of generating electric power with a density of about 250 million watts per cubic metre of channel volume.

Where is the Hall Field in a magnetohydrodynamic power generator?

An additional electric field, called the Hall field, is established along the axis of the channel.