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	Betz-gränsen	Rankinecykeln
Ämnesområde	Termodynamik	Termodynamik
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1920	1859
Upphovsperson	Albert Betz	William John Macquorn Rankine
Typ	Theoretical limit	Thermodynamic cycle
Ursprungskälla	Betz, A. (1920). Das Maximum der theoretisch möglichen Ausnützung des Windes durch Windmotoren. Zeitschrift für das gesamte Turbinenwesen, 26, 307-320.	Smith, J. M., Van Ness, H. C., & Abbott, M. M. (2005). Introduction to Chemical Engineering Thermodynamics (7th ed.). McGraw-Hill. ISBN: 978-0071247009
Alias	Lanchester-Betz limit, wind turbine efficiency limit	Clausius-Rankine cycle, steam cycle, vapor power cycle
Närliggande	3	3
Sammanfattning	The Betz Limit states that no wind turbine can extract more than 59.3% of the kinetic energy from flowing wind, regardless of design. This fundamental thermodynamic limit arises because extracting energy slows the wind, which then blocks further energy extraction. Albert Betz derived this limit in 1920 from momentum and energy conservation. Modern wind turbines achieve 35-45% efficiency, approaching this theoretical maximum.	The Rankine Cycle is the fundamental thermodynamic cycle for steam power plants. It describes how thermal energy from burning fuel or concentrated solar radiation is converted to mechanical work and ultimately electricity. The cycle consists of four processes: isobaric heat addition in the boiler, isentropic expansion through the turbine, isobaric heat rejection in the condenser, and isentropic compression by the pump.