قارن الطرق

	طريقة السعة المجمعة	طريقة الفعالية-NTU
المجال	الديناميكا الحرارية	الديناميكا الحرارية
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1959	1984
صاحب الطريقة	Harry Carslaw and John Jaeger	William Kays and Alvin London
النوع	Heat transfer analysis	Heat transfer correlation
المصدر التأسيسي	Carslaw, H. S., & Jaeger, J. C. (1959). Conduction of Heat in Solids. Oxford University Press. ISBN: 978-0198533689	Kays, W. M., & London, A. L. (1984). Compact Heat Exchangers (3rd ed.). McGraw-Hill. ISBN: 978-0070334007
الأسماء البديلة	lumped mass analysis, lumped system analysis	epsilon-NTU method, effectiveness method
ذات صلة	3	3
الملخص	The Lumped Capacitance Method is a simplification technique for solving unsteady-state heat transfer problems. It assumes that thermal properties are uniform throughout a solid body and that temperature variations within the object are negligible. This approach enables engineers to solve complex transient heat conduction problems using ordinary differential equations rather than partial differential equations.	The Effectiveness-NTU method is an alternative approach to heat exchanger analysis that measures thermal performance relative to the theoretical maximum possible heat transfer. It is particularly powerful for design problems where outlet temperatures are unknown. The method uses effectiveness (ratio of actual to maximum possible heat transfer) and NTU (Number of Transfer Units, a dimensionless parameter related to overall heat transfer area) to characterize heat exchanger performance.