Table of Contents
- 1 How does a magnetohydrodynamic generator work?
- 2 What is MHD energy conversion?
- 3 What is plasma and MHD power generation?
- 4 What is the function of seeding used in MHD?
- 5 Where is the input of the MHD?
- 6 What are the parameters which govern the power output of an MHD generator?
- 7 What is an MHD generator?
- 8 What is a magnetohydrodynamic power generator?
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 MHD energy conversion?
The MHD generation or, also known as magneto hydrodynamic power generation is a direct energy conversion system which converts the heat energy directly into electrical energy, without any intermediate mechanical energy conversion, as opposed to the case in all other power generating plants.
What are the advantages of MHD generator?
Conventional coal-fired generators achieve a maximum efficiency of about 35\%. MHD generators have the potential to reach 50\% – 60\% efficiency. The higher efficiency is due to recycling the energy from the hot plasma gas to standard steam turbines.
Which is the most promising power generation system and why?
Which of these is the most promising power generation system? Explanation: Since it is capable of tapping vast potential of modern furnaces. Explanation: Thermoelectric power generation of a non conventional type.
What is plasma and MHD power generation?
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. In the MHD system, the kinetic energy of the gas is converted directly to electric energy as it is allowed to expand.
What is the function of seeding used in MHD?
What is seeding in MHD generation? Seeding is a process of injecting a seeding material like potassium carbonate or cesium into the plasma/fluid to increase the electrical conductivity.
How can plasma be used to generate electricity?
The flow of conducting plasma (ionized gas) through a magnetic field at high velocity causes a voltage to be generated across the electrodes which are placed at suitable position in the stream of ionized gas and thus the electrical energy is generated directly through thermal energy.
What are problems and limitations of MHD power generation?
The disadvantage of MHD generation is as given below: 1) Suffers from reverse flow (short circuits) of electrons through the conducting fluids around the ends of the magnetic field. 2) Needs very large magnets and this is a major expense. 3) High friction and heat transfer losses. 4) High operating temperature.
Where is the input of the MHD?
Where is the input of the MHD duct heated in a closed cycle MHD-steam power plant? Explanation: The seed is heated in the nuclear reactor.
What are the parameters which govern the power output of an MHD generator?
The power output of an MHD generator for each cubic metre of its channel volume is proportional to the product of the gas conductivity, the square of the gas velocity, and the square of the strength of the magnetic field through which the gas passes.
Which fuel is used in MHD generator?
Fuels like coal, oil, natural gas, and other fuels that are capable of producing high temperatures can be utilized in MHD generators.
What is seeding in MHD generator?
2). What is seeding in MHD generation? Seeding is a process of injecting a seeding material like potassium carbonate or cesium into the plasma/fluid to increase the electrical conductivity.
What is an MHD generator?
MHD generators are different from traditional electric generators in that they can operate at high temperatures without moving parts. The MHD generator or dynamo transforms thermal energy or kinetic energy directly into electricity.
What is a magnetohydrodynamic power generator?
The magnetohydrodynamic power generator[8] is a device that generates electric power by means of the interaction of a moving fluid (usually a ionized gas or plasma) and a magnetic field. As all direct conversion processes the MHD generators can also convert thermal energy directly into electricity without moving parts.
What is the difference between MHD and mechanical dynamo?
An MHD generator, like a conventional generator, relies on moving a conductor through a magnetic field to generate electric current. The MHD generator uses hot conductive ionized gas (a plasma) as the moving conductor. The mechanical dynamo, in contrast, uses the motion of mechanical devices to accomplish this.
How does a plasma MHD generator work?
The exhaust of a plasma MHD generator is a flame, still able to heat the boilers of a steam power plant. In the MHD generator, the solid conductors are replaced by a gaseous conductor, an ionized gas.