Concepts

Carnot Efficiency

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Also Known As Carnot Limit

Thermodynamic Limit

Citation Formats

General Reference

Energy Atlas. "Carnot Efficiency." Accessed August 30, 2026. https://energy.interactiveatlas.org/concepts/carnot-efficiency.

APA Style

Energy Atlas. (n.d.). Carnot Efficiency. Retrieved August 30, 2026, from https://energy.interactiveatlas.org/concepts/carnot-efficiency

BibTeX

@misc{energyatlas-carnot-efficiency,
  author = {Energy Atlas},
  title = {Carnot Efficiency},
  year = {2026},
  url = {https://energy.interactiveatlas.org/concepts/carnot-efficiency},
  note = {Accessed August 30, 2026}
}

The maximum share of heat any engine can convert into work, set by the temperatures between which it operates, derived by Sadi Carnot in 1824 before the laws of thermodynamics were formalized. It is the reason power stations chase ever hotter steam and why most of the energy in fuel burned for electricity leaves as waste heat: the limit is physics, not engineering shortfall.

Facts

Concept Domain

Thermodynamics 1

Formulated Year

1824 2

Cross-Tradition Connections

Associated With

Steam Engine

Carnot derived the limit while analyzing the steam engines of his day.

Source Encyclopedia Britannica

Sources

1. Encyclopedia Britannica

Encyclopedia Britannica, Inc.View the Source

2. Wikipedia

Wikimedia FoundationIntroduction

Quote, Introduction

Nicolas Leonard Sadi Carnot in 1824 that specifies limits on the maximum efficiency that any heat engine can obtain.

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