Energy transformation, also known as energy conversion, is the process of changing energy from one form to another. In physics, energy is a quantity that provides the capacity to perform work or moving (e.g. lifting an object) or provides heat. In addition to being converted, according to the law of conservation of energy, energy is transferable to a different location or object, but it cannot be created or destroyed.
The energy in many of its forms may be used in natural processes, or to provide some service to society such as heating, refrigeration, lighting or performing mechanical work to operate machines. For example, to heat a home, the furnace burns fuel, whose chemical potential energy is converted into thermal energy, which is then transferred to the home’s air to raise its temperature.
Examples
Examples of sets of energy conversions in machines
A coal-fired power plant involves these energy transformations:
Kinetic energy of steam converted to mechanical energy in the turbine
Mechanical energy of the turbine is converted to electrical energy by the generator, which is the ultimate output
In such a system, the first and fourth steps are highly efficient, but the second and third steps are less efficient. The most efficient gas-fired electrical power stations can achieve 50% conversion efficiency. Oil- and coal-fired stations are less efficient.
In a conventional automobile, the following energy transformations occur:
Chemical energy in the fuel is converted into kinetic energy of expanding gas via combustion
Kinetic energy of expanding gas converted to the linear piston movement
Linear piston movement converted to rotary crankshaft movement
Rotary crankshaft movement passed into transmission assembly
Rotary movement passed out of transmission assembly
Rotary movement passed through a differential
Rotary movement passed out of differential to drive wheels
Rotary movement of drive wheels converted to linear motion of the vehicle
Other energy conversions
There are many different machines and transducers that convert one energy form into another. A short list of examples follows:
Energy transformation
Wikipedia
https://en.wikipedia.org/wiki/Energy_transformation
Energy transformation, also known as energy conversion, is the process of changing energy from one form to another. In physics, energy is a quantity that provides the capacity to perform work or moving (e.g. lifting an object) or provides heat. In addition to being converted, according to the law of conservation of energy, energy is transferable to a different location or object, but it cannot be created or destroyed.
The energy in many of its forms may be used in natural processes, or to provide some service to society such as heating, refrigeration, lighting or performing mechanical work to operate machines. For example, to heat a home, the furnace burns fuel, whose chemical potential energy is converted into thermal energy, which is then transferred to the home’s air to raise its temperature.
Examples
Examples of sets of energy conversions in machines
A coal-fired power plant involves these energy transformations:
In such a system, the first and fourth steps are highly efficient, but the second and third steps are less efficient. The most efficient gas-fired electrical power stations can achieve 50% conversion efficiency. Oil- and coal-fired stations are less efficient.
In a conventional automobile, the following energy transformations occur:
Other energy conversions
There are many different machines and transducers that convert one energy form into another. A short list of examples follows:
電気エネルギー
(electrical energy)
力学的エネルギー
(mechanical energy)
運動エネルギー
(kinetic energy)
位置エネルギー
(potential energy)
化学エネルギー
(chemical energy)
熱エネルギー
(thermal energy)
磁気エネルギー
(magnetic energy)
光エネルギー
(light energy)
核エネルギー
(nuclear energy)
電気エネルギー → 運動エネルギー : 電動機
電気エネルギー ← 運動エネルギー : 発電機、風力発電、水力発電
電気エネルギー → 化学エネルギー : 電気分解、電気精錬
電気エネルギー ← 化学エネルギー : 電池
電気エネルギー → 熱エネルギー : 電熱器、電磁調理器
電気エネルギー ← 熱エネルギー : 火力発電、原子力発電、太陽熱発電、海洋温度差発電
電気エネルギー → 磁気エネルギー : 電磁石、電磁ブレーキ
電気エネルギー ← 磁気エネルギー : MHD発電
電気エネルギー → 光エネルギー : 照明、発光ダイオード、エレクトロルミネセンス
電気エネルギー ← 光エネルギー : 太陽光発電
電気エネルギー ← 核エネルギー : 原子力電池