Science: Thermal Energy: Forms of Energy and Thermal Energy Storage Applications (For CBSE, ICSE, IAS, NET, NRA 2022)

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Forms of Energy

The various forms include potential energy, kinetic energy, heat energy, chemical energy, and light energy.

Kinetic Energy

  • Energy possessed by a body by virtue of its state of motion is called Kinetic energy. Kinetic energy is always positive and is a scalar. The fact, that moving bodies carry energy with them is proved by some, of the several happenings in day to day life.
  • Kinetic Energy, , when m is the mass and v is the velocity of body.

Potential Energy

Potential energy is energy. due to position. If a body is in a position such that if it were released it would begin to move, it has potential energy. There are two common forms of potential energy, gravitational and elastic.

Gravitational Potential Energy

When an object is allowed to fall from one level to a lower level it gains speed due. to gravitational pull, i.e.. it gains kinetic energy. Therefore, in possessing height, a body has the ability to convert its height into kinetic energy, i.e.. it ″ possesses potential energy. If a mass m is at a height h above a lower level the P. E. possessed by the mass is (mg) (h) .

Elastic Potential Energy

Same work has to be done to change the shape of a body. This work gets stored in the deformed body in the form of elastic potential energy. Elastic potential energy is never negative whether due to extension or to compression.

Thermal Energy Storage Applications

Thermal Energy Storage
  • The thermal energy storage applications can be applied in following fields.
  • In concentrating solar power plants to supply dispatchable power even during the night.
  • In thermal power plants to operate more and rapid load changes.
  • Provide heat supply security in combined heat and power plants and temporally separate the heat and power generation.
  • To recover and utilize heat in process industries which is otherwise lost.

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