Engine Efficiency

Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines-

  1. Internal combustion (gasoline, diesel and gas turbine, i.e., Brayton cycle engines) and
  2. External combustion engines (steam piston, steam turbine, and the Stirling cycle engine).

Each of these engines has thermal efficiency characteristics that are unique to it.

Read more about Engine EfficiencyMathematical Definition, Compression Ratio, Friction, Oxygen

Other articles related to "efficiency, engine, engine efficiency":

Brake Specific Fuel Consumption - The Relationship Between BSFC Numbers and Efficiency
... To calculate the actual efficiency of an engine requires the energy density of the fuel being used ... (LHV) is used for internal combustion engine efficiency calculations because the heat at temperatures below 150 °C (300 °F) cannot be put to use. 18,500 BTU/lb (0.0119531 kW·h/g) Thus a diesel engine's efficiency = 1/(BSFC*0.0119531) and a gasoline engine's efficiency = 1/(BSFC*0.0122225) ...
Fuel Efficiency In Transportation - Transportation Modes - Aircraft
... Flight altitude affects engine efficiency ... Jet-engine efficiency increases at altitude up to the tropopause, the temperature minimum of the atmosphere at lower temperatures, the Carnot efficiency is higher ... Jet engine efficiency is also increased at high speeds, but above about Mach 0.85 the airframe aerodynamic losses increase faster ...
Engine Efficiency - External Combustion Engines - Stirling Engines
... The Stirling cycle engine has the highest theoretical efficiency of any thermal engine but it is more expensive to make and is not competitive with other types for normal commercial use ...

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    Industrial man—a sentient reciprocating engine having a fluctuating output, coupled to an iron wheel revolving with uniform velocity. And then we wonder why this should be the golden age of revolution and mental derangement.
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