Question

50 examples of transformation of energy

Answer 1

Examples of sets of energy conversions in machines Edit
A coal-fired power plant involves these energy transformations:

Chemical energy in the coal is converted into thermal energy in the exhaust gases of combustion
Thermal energy of the exhaust gases converted into thermal energy of steam through heat exchange
Thermal energy of steam converted to mechanical energy in the turbine
Mechanical energy of the turbine converted to electrical energy by the generator, which is the ultimate outpuk
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.[citation needed] 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
There are many different machines and transducers that convert one energy form into another. A short list of examples follows:

Thermoelectric (Heat → Electrical energy)
Geothermal power (Heat→ Electrical energy)
Heat engines, such as the internal combustion engine used in cars, or the steam engine (Heat → Mechanical energy)
Ocean thermal power (Heat → Electrical energy)
Hydroelectric dams (Gravitational potential energy → Electrical energy)
Electric generator (Kinetic energy or Mechanical work → Electrical energy)
Fuel cells (Chemical energy → Electrical energy)
Battery (electricity) (Chemical energy → Electrical energy)
Fire (Chemical energy → Heat and Light)
Electric lamp (Electrical energy → Heat and Light)
Microphone (Sound → Electrical energy)
Wave power (Mechanical energy → Electrical energy)
Windmills (Wind energy → Electrical energy or Mechanical energy)
Piezoelectrics (Strain → Electrical energy)
Friction (Kinetic energy → Heat)
Electric heater (Electric energy → Heat)
Photosynthesis (Electromagnetic radiation → Chemical energy)
ATP hydrolysis (Chemical energy in adenosine triphosphate → mechanical energy)