Carnot efficiency

E267412

Carnot efficiency is the theoretical maximum efficiency that any heat engine can achieve when operating between two temperatures, serving as a fundamental limit in thermodynamics.

All labels observed (3)

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf physical law consequence ⓘ
thermodynamic efficiency limit ⓘ
appliesTo Carnot engine ⓘ
heat engine ⓘ
reversible heat engine ⓘ
assumes no friction ⓘ
no heat losses ⓘ
quasi-static operation ⓘ
reversible processes ⓘ
cannotExceed 1 − T_cold / T_hot ⓘ
constrains real engine efficiency ⓘ
definedBetween cold reservoir temperature ⓘ
hot reservoir temperature ⓘ
dependsOn cold reservoir absolute temperature ⓘ
hot reservoir absolute temperature ⓘ
dimension dimensionless quantity ⓘ
equals efficiency of reversible engine between same temperatures ⓘ
expressedAs fraction ⓘ
percentage ⓘ
field thermodynamics ⓘ
greaterThan efficiency of any irreversible engine between same temperatures ⓘ
hasFormula η_C = (T_hot − T_cold) / T_hot ⓘ
η_C = 1 − T_cold / T_hot ⓘ
historicalOrigin Carnot's 1824 work "Reflections on the Motive Power of Fire" ⓘ
impliedBy second law of thermodynamics ⓘ
implies zero efficiency when T_hot = T_cold ⓘ
increasesWhen T_cold decreases for fixed T_hot ⓘ
T_hot increases for fixed T_cold ⓘ
independentOf engine construction details ⓘ
working substance ⓘ
introducedInContextOf ideal heat engines ⓘ
lessThanOrEqualTo 1 ⓘ
maximumForGivenTemperatures any heat engine ⓘ
namedAfter Sadi Carnot ⓘ
relatedTo Carnot cycle ⓘ
Clausius inequality ⓘ
linked to: Clausius theorem

entropy ⓘ
symbol η_C ⓘ
η_Carnot ⓘ
temperatureScale Kelvin ⓘ
linked to: kelvin

Rankine ⓘ
temperatureUnitRequirement absolute temperature scale ⓘ
upperBoundOn thermal efficiency ⓘ
usedIn heat engine design ⓘ
heat pump performance analysis ⓘ
power plant analysis ⓘ
refrigeration cycle analysis ⓘ

How these facts were elicited

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Shockley–Queisser limit → isRelatedTo → Carnot efficiency ⓘ
Sadi Carnot → notableConcept → Carnot efficiency ⓘ
subject linked to: Carnot
Sadi Carnot → notableConcept → Carnot theorem ⓘ
subject linked to: Carnot
linked to: Carnot efficiency
Kelvin–Planck statement of the second law of thermodynamics → relatedTo → Carnot theorem ⓘ
linked to: Carnot efficiency
Nicolas Léonard Sadi Carnot → knownFor → Carnot efficiency ⓘ
subject linked to: Nicolas Léonard Sadi
Carnot cycle → relatedTo → Carnot theorem ⓘ
linked to: Carnot efficiency
Sadi Carnot → notableConcept → Carnot efficiency ⓘ
subject linked to: Carnot family
second law of thermodynamics → implies → Carnot efficiency is the maximum efficiency of a heat engine operating between two temperatures ⓘ
linked to: Carnot efficiency
Carnot engine → relatedConcept → Carnot theorem ⓘ
linked to: Carnot efficiency