Saturday, 7 May 2016

Carnot Cycle, Otto Cycle, and Diesel Cycle

Carnot Cycle, Otto Cycle, and Diesel Cycle



Carnot Cycle
Carnot cycle is a reversible cycle where a working fluid goes under a cycle with working process Isothermal heat addition, Icentropic expansion, Isothermal heat rejection and finally Icentropic compression.


Carnot cycle has the most efficiency of all the working cycle present in the world because its each process is nearly reversible. Heat Engines work on the Carnot Cycle while Refrigerator and Heat Pumps work on revers Carnot engine.

Otto and Diesel
Engines working on Otto and diesel cycle in an automoblibe although form in a cycle, are not reversible cycle as the working medium changes changes after each cycle. Otto and diesel are much similar to each other except the heat addition process. In otto heat addition is by constant volume process where as in diesel the heat addition is by constant pressure process. These cycles are not as efficient as carnot cycle as process are not reversible.

Ideal Otto cycle


Ideal Diesel cycle







OR

Carnot cycle is an ideal cycle proposed by said carnot, ideal cycle.
An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. It is the thermodynamic cycle most commonly found in automobile engines.
The Diesel cycle is a combustion process of a reciprocating internal combustion engine. In it, fuel is ignited by heat generated during the compression of air in the combustion chamber, into which fuel is then injected.


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