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	Finit-tidsteromodynamik	Rankinecykeln	Ångkompressionscykeln
Ämnesområde	Termodynamik	Termodynamik	Termodynamik
Familj	Process / pipeline	Process / pipeline	Process / pipeline
Ursprungsår	1996	1859	1834
Upphovsperson	Adrian Bejan	William John Macquorn Rankine	Jacob Perkins
Typ	Thermodynamic optimization	Thermodynamic cycle	Thermodynamic cycle
Ursprungskälla	Bejan, A. (1996). Entropy Generation Minimization. CRC Press. ISBN: 978-0849394515	Smith, J. M., Van Ness, H. C., & Abbott, M. M. (2005). Introduction to Chemical Engineering Thermodynamics (7th ed.). McGraw-Hill. ISBN: 978-0071247009	Stoecker, W. F., Jones, J. W., & Sunnam, B. A. (1998). Refrigeration and Air Conditioning (2nd ed.). McGraw-Hill. ISBN: 978-0070613638
Alias	FTT, irreversible thermodynamics	Clausius-Rankine cycle, steam cycle, vapor power cycle	refrigeration cycle, heat pump cycle
Närliggande	3	3	3
Sammanfattning	Finite-Time Thermodynamics (FTT) relaxes the classical assumption that thermodynamic processes occur reversibly (infinitely slowly). Instead, it analyzes real thermal systems operating at finite rates with irreversibilities. FTT reveals fundamental trade-offs: to complete a process quickly requires accepting large irreversibilities and low efficiency, while slow operation achieves high efficiency but requires impractical time and cost.	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.	The Vapor Compression Cycle is the fundamental thermodynamic cycle for refrigeration systems and heat pumps. It describes how mechanical work is used to transfer heat from a cold space (evaporator) to a warm space (condenser), operating against the natural temperature gradient. The cycle consists of four processes: isentropic compression, isobaric condensation, isenthalpic throttling, and isobaric evaporation.