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	有限時間熱力学	ブレイтонサイクル	エクセルゴ経済解析	ランキンサイクル
分野	熱力学	熱力学	熱力学	熱力学
系統	Process / pipeline	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1996	1873	1993	1859
提唱者	Adrian Bejan	George Brayton	Goran Tsatsaronis	William John Macquorn Rankine
種類	Thermodynamic optimization	Thermodynamic cycle	Thermoeconomic assessment	Thermodynamic cycle
原典	Bejan, A. (1996). Entropy Generation Minimization. CRC Press. ISBN: 978-0849394515	Moran, M. J., Shapiro, H. N., Boettner, D. D., & Bailey, M. B. (2014). Fundamentals of Engineering Thermodynamics (8th ed.). Wiley. ISBN: 978-1118412947	Tsatsaronis, G. (1993). Thermoeconomic analysis and optimization of energy conversion processes. Progress in Energy and Combustion Science, 19(4), 323-356.	Smith, J. M., Van Ness, H. C., & Abbott, M. M. (2005). Introduction to Chemical Engineering Thermodynamics (7th ed.). McGraw-Hill. ISBN: 978-0071247009
別名	FTT, irreversible thermodynamics	Joule cycle, gas turbine cycle	exergy costing, thermoeconomic analysis	Clausius-Rankine cycle, steam cycle, vapor power cycle
関連	3	3	3	3
概要	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 Brayton Cycle (also called Joule Cycle) describes the thermodynamic process in gas turbines and jet engines. It consists of four processes: isentropic compression in a compressor, isobaric combustion (heat addition), isentropic expansion in a turbine, and isobaric heat rejection. The Brayton Cycle is the foundation for analyzing aircraft propulsion, ground-based power generation, and simple-cycle gas turbine plants.	Exergoeconomic analysis combines thermodynamics and economics by assigning monetary costs to exergy streams. It reveals how thermodynamic irreversibilities translate into economic losses within industrial systems. This approach enables engineers to identify the most economically significant inefficiencies and make informed decisions about component improvements and system optimization.	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.