Table of Contents
- 1 What are the materials used in MHD generator?
- 2 Which component is required for Magneto Hydro Dynamic MHD power generation?
- 3 What is magneto hydrodynamic devices?
- 4 What are the important factors when selecting materials for an MHD generator?
- 5 What are the important factors when selecting materials in MHD power generation?
- 6 What is the basic principle of MHD power generation?
- 7 What are problems and limitations of MHD power generation?
- 8 What is hydro power turbine?
- 9 Which is an example of a magneto hydro dynamic generator?
- 10 How is the power generation of MHD generators governed?
What are the materials used in MHD generator?
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.
Which component is required for Magneto Hydro Dynamic MHD power generation?
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 magneto hydrodynamic devices?
•A magneto hydrodynamic (MHD) generator is a device that generates power directly by interacting with a rapidly. moving stream of fluid, usually ionized gases/plasma. •MHD devices transform heat or kinetic energy into electrical energy.
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 turbine is used in hydro power plant?
Turbines convert the energy of rushing water, steam or wind into mechanical energy to drive a generator. The generator then converts the mechanical energy into electrical energy. In hydroelectric facilities, this combination is called a generating unit….Turbines.
| Propeller | up to 15 metres |
|---|---|
| Pelton | 300 metres and over |
What are the important factors when selecting materials for an MHD generator?
Requirements for material in MHD generator: Electrodes: For high conductivity, high temperature is required. Electrically conductive and structurally stable at high temperature…. There are several types of ionization.
- Thermal Ionization.
- Magnetically induced ionization.
- Radio frequency wave induced ionisation.
What are the important factors when selecting materials in MHD power generation?
Requirements for material in MHD generator: Electrodes: For high conductivity, high temperature is required. Electrically conductive and structurally stable at high temperature.
What is the basic principle of MHD power generation?
Principle of MHD Generator As the conducting fluid (conductor) moves through the magnetic field, it produces an electrical field perpendicular to the magnetic field. This process of electric power generation through MHD is based on the principle of Faraday’s law of electromagnetic induction.
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.
Which seed material is used in liquid metal MHD system?
The seed material, generally potassium carbonate is injected into the combustion chamber, the potassium is then ionized by the hot combustion gases at temperature of roughly 2300′ c to 2700’c. 20.
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.
What is hydro power turbine?
Hydro turbines are devices used in hydroelectric generation plants that transfer the energy from moving water to a rotating shaft to generate electricity. These turbines rotate or spin as a response to water being introduced to their blades.
Which is an example of a magneto hydro dynamic generator?
Magneto Hydro Dynamics (magneto-fluid- dynamics or hydro-magnetics ) is the academic discipline which studies the dynamics of electrically conducting fluids. Examples of such fluids include plasmas, liquid metals, and salt water. The generator used in this process is called Magneto Hydro Dynamic Generator.
How are magnetohydrodynamic generators used in steam power plants?
The hot exhaust gas from an MHD generator can heat the boilers of a steam power plant, increasing overall efficiency. An MHD generator, like a conventional generator, relies on moving a conductor through a magnetic field to generate electric current.
What’s the efficiency of magneto hydro power plants?
MHD power plants have an overall efficiency of 55-60% but it can be boosted up to 80% or more by using superconducting magnets in this process. Whereas the other non conventional methods of power generation such as solar, wind, geo-thermal, tidal have a highest efficiency not more than 35%.
How is the power generation of MHD generators governed?
PRINCIPLE MHD power generation process is governed by M.Faradays law of Electromagnetic Induction. (i.e. when the conductor moves through a magnetic field, it generates an electric field perpendicular to the magnetic field & direction of conductor).