Carnot cycle........
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Carnot cycle. : an ideal reversible closed thermodynamic cycle in which the working substance goes through the four successive operations of isothermal expansion to a desired point,
adiabatic expansion to a desired point, isothermal compression, and adiabatic compression back to its initial state.
According to the Carnot theorem, the reversible engine will always have a greater efficiency than the irreversible one.
The Carnot cycle is the only thermodynamic cycle that is reversible, because compression and expansion of the gas are isentropic.
Carnot's theorem, developed in 1824 by Nicolas Léonard Sadi Carnot, also called Carnot's rule, is a principle that specifies limits on the maximum efficiency any heat engine can obtain.
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The Carnot cycle is a theoretical ideal thermodynamic cycle proposed by French physicist Sadi Carnot in 1824 and expanded upon by others in the 1830s and 1840s.