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What is thermionic power generation?
thermionic power converter, also called thermionic generator, thermionic power generator, or thermoelectric engine, any of a class of devices that convert heat directly into electricity using thermionic emission rather than first changing it to some other form of energy.
What is the meaning of thermionic?
Definition of thermionic : relating to, using, or being the emission of charged particles (such as electrons) by an incandescent material.
What is the basic principle of thermionic generator?
A thermionic generator (converter) converts heat energy directly to electrical energy by utilizing thermionic emission effect. All metals and some oxides have free electrons which are released on heating. In a thermionic converter, electrons act as the working fluid in place of a vapour or gas.
What is thermionic reaction?
Definition: Thermionic effect or Thermionic Emission can be defined as the phenomenon in which electrons are emitted from the surface of the metal when heat energy is applied to the metal. The word Thermionic is formed from the words Thermal and ions. Thermal means heat and ions are charged particles.
How does thermionic power system generate electricity?
A thermionic converter produces an electromotive force or voltage between two electrodes, separated by a plasma or vacuum. One electrode is at an elevated temperature sufficient to become a thermionic electron emitter and the other at a temperature enough lower to become an electron collector.
What are the components of thermionic generator?
Thermoelectric power generators consist of three major components: thermoelectric materials, thermoelectric modules and thermoelectric systems that interface with the heat source.
What efficiencies of thermionic power generator is realized?
What efficiencies of thermionic power generator have been realised? Explanation: Efficiency of 30-40% has been realised in thermionic generators.
What is the thermionic emission in physics?
Thermionic emission is the liberation of electrons from an electrode by virtue of its temperature (releasing of energy supplied by heat). This occurs because the thermal energy given to the charge carrier overcomes the work function of the material.
Who discovered the thermionic emission?
Edison
Thermionic emission was discovered by Edison in 1883, the so-called Edison effect, and in 1899 Thomson demon- strated that thermionic emission consisted of electrons.
What particles are emitted in thermionic emission?
thermionic emission, discharge of electrons from heated materials, widely used as a source of electrons in conventional electron tubes (e.g., television picture tubes) in the fields of electronics and communications. The phenomenon was first observed (1883) by Thomas A.
What is thermionic energy conversion?
Thermionic energy conversion is a process by which thermal energy can be transformed into usable electricity. While such transformations have been historically limited by low efficiencies, recent advances have made thermionic energy conversion a viable source of energy generation in certain applications. What is Thermionic Conversion?
Definition of thermionic. : relating to, using, or being the emission of charged particles (such as electrons) by an incandescent material.
What is thermionic emission definition & applications?
Thermionic Emission: Definition & Applications. What is Thermionic Emission? Thermionic emission is defined as the electron emission caused by a sufficiently high level of thermal energy. When a metal is heated sufficiently, the thermal energy supplied to the free electrons causes the emission of electrons from the metal surface.
What is therthermionic refrigeration?
Thermionic refrigeration is a solid-state refrigerator based on a different principle than thermoelectric refrigeration. The name arises from thermionic emission, which is the thermal excitation of hot electrons from a metal surface.