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	対数平均温度差（LMTD）法	ランキンサイクル
分野	熱力学	熱力学
系統	Process / pipeline	Process / pipeline
提唱年	1950	1859
提唱者	Donald Kern	William John Macquorn Rankine
種類	Heat transfer correlation	Thermodynamic cycle
原典	Kern, D. Q. (1950). Process Heat Transfer. McGraw-Hill.	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	LMTD, logarithmic mean temperature difference	Clausius-Rankine cycle, steam cycle, vapor power cycle
関連	3	3
概要	The Log Mean Temperature Difference (LMTD) method is a fundamental tool for calculating heat transfer rates in heat exchangers. It defines the effective temperature difference between two fluids as the logarithmic average of the temperature differences at the inlet and outlet. This method enables engineers to size and analyze heat exchangers systematically using the basic heat transfer equation Q = U A LMTD.	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.