เปรียบเทียบวิธี

	UNIFAC	การวิเคราะห์พินช์
สาขาวิชา	ฟิสิกส์ประยุกต์	ฟิสิกส์ประยุกต์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1975	1978
ผู้ริเริ่ม	Aage Fredenslund, Russell Jones, John Prausnitz	Bodo Linnhoff, John Flower
ประเภท	Activity coefficient model; predictive liquid-phase property method	Thermal design and optimization method
แหล่งต้นตำรับ	Fredenslund, A., Jones, R. L., & Prausnitz, J. M. (1975). Group-contribution estimation of activity coefficients in nonideal liquid mixtures. AIChE Journal, 21(6), 1086-1099.	Linnhoff, B., & Flower, J. R. (1978). Synthesis of heat exchanger networks: I. Systematic generation of energy optimal networks. AIChE Journal, 24(4), 633-642.
ชื่อเรียกอื่น	UNIFAC predictive model, UNIQUAC functional-group contribution	heat integration, pinch point method, process integration
ที่เกี่ยวข้อง	3	4
สรุป	UNIFAC (Universal Functional-group Activity Coefficient) is a predictive model for liquid-phase activity coefficients of multicomponent mixtures. Developed by Fredenslund, Jones, and Prausnitz in 1975, it decomposes molecules into functional groups and uses group interaction parameters to estimate non-ideal behavior. UNIFAC is revolutionary because it can predict phase equilibria for mixtures never experimentally measured, making it invaluable for process design and chemical engineering.	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.