手法を比較

	Peng-Robinson状態方程式	Pinch Analysis
分野	応用物理学	応用物理学
系統	Process / pipeline	Process / pipeline
提唱年	1976	1978
提唱者	Ding-Yu Peng and David Bernard Robinson	Bodo Linnhoff, John Flower
種類	Equation of state; thermodynamic property correlation	Thermal design and optimization method
原典	Peng, D. Y., & Robinson, D. B. (1976). A new two-constant equation of state. Industrial & Engineering Chemistry Fundamentals, 15(1), 59-64.	Linnhoff, B., & Flower, J. R. (1978). Synthesis of heat exchanger networks: I. Systematic generation of energy optimal networks. AIChE Journal, 24(4), 633-642.
別名	PR-EOS, Peng-Robinson model	heat integration, pinch point method, process integration
関連	4	4
概要	The Peng-Robinson equation of state is a cubic model that describes the thermodynamic properties of pure fluids and mixtures. Introduced by Ding-Yu Peng and David Bernard Robinson in 1976, it improves upon earlier models (van der Waals, Redlich-Kwong) by better predicting compressibility factors and phase equilibria, especially near the critical point. It is widely used in petroleum engineering, chemical process design, and natural gas calculations.	Pinch analysis is a systematic method for identifying the minimum energy requirements and optimal heat recovery opportunities in chemical processes. Developed by Bodo Linnhoff and John Flower in 1978, it graphically identifies the 'pinch point'—the most constrained part of the process where heating and cooling demands nearly balance. By targeting these bottlenecks, engineers can design energy-efficient heat exchanger networks and reduce operating costs dramatically.