Carnot heat engine
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A Carnot heat engine is a theoretical heat engine that operates on the Carnot cycle. The basic model for this engine was developed by French military engineer Nicolas Léonard Sadi Carnot in 1824. The
Sadi Carnot c. 1813 as a student at the École polytechnique, Paris (Louis-Léopold Boilly, private collection)
Cornish steam engines, famous for their efficiency, were avidly studied in France where fuel was expensive (Wellcome Collection).
The opening page of Sadi Carnot's book (Thurston translation)
Entropy
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Entropy is a thermodynamic state variable that quantifies the probabilistic distribution of accessible microstates in a system. The term and the concept are used in diverse fields, from classical ther
Carnot heat engine
…Benoît Paul Émile Clapeyron in 1834 and mathematically explored by Rudolf Clausius in 1857, work that led to the fundamental thermodynamic concept of entropy. The Carnot engine is the most efficient heat engine which is theoretically possible. The efficiency depends only upon the absolute temperatures of the…
Fragmentation of standardized paper sheets into heterogeneous offcuts through industrial cutting, illustrating increased entropy in a production system.
Rudolf Clausius (1822–1888), originator of the concept of entropy