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・ Engineering Council
・ Engineering Council of India
・ Engineering Council of South Africa
・ Engineering cybernetics
・ Engineering design management
・ Engineering design process
・ Engine configuration
・ Engine control unit
・ Engine Cooking
・ Engine coolant temperature sensor
・ Engine crane
・ Engine department (ship)
・ Engine displacement
・ Engine Down
・ Engine downsizing
Engine efficiency
・ Engine Engine Number 9
・ Engine failure on take-off
・ Engine house
・ Engine House (Auburn, Maine)
・ Engine House No. 10 (Washington, D.C.)
・ Engine House No. 11 (Detroit, Michigan)
・ Engine House No. 18
・ Engine House No. 18 (Detroit, Michigan)
・ Engine House No. 18 (Los Angeles, California)
・ Engine House No. 2 and Hook and Ladder No. 9
・ Engine House No. 28 (Buffalo, New York)
・ Engine House No. 3 (Fort Wayne, Indiana)
・ Engine House No. 3, Truck No. 2
・ Engine House No. 34 (Boston, Massachusetts)


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Engine efficiency : ウィキペディア英語版
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-
#Internal combustion (gasoline, diesel and gas turbine, i.e., Brayton cycle engines) and
#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.
==Mathematical definition==

The efficiency of engine is defined as ratio of the useful work done to the heat provided.
: \eta = \frac = \frac
where, Q1 is the heat absorbed and Q1-Q2 is the work done.
Please note that the term work done relates to the power delivered at the clutch or at the driveshaft.
This means the friction and other losses are subtracted from the work done by thermodynamic expansion. Thus an engine not delivering any work to the outside environment has zero efficiency.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Engine efficiency」の詳細全文を読む



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