เปรียบเทียบวิธี

	ระเบียบวิธีขีดความสามารถแบบรวม (Lumped Capacitance Method)	วิธี Effectiveness-NTU
สาขาวิชา	อุณหพลศาสตร์	อุณหพลศาสตร์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1959	1984
ผู้ริเริ่ม	Harry Carslaw and John Jaeger	William Kays and Alvin London
ประเภท	Heat transfer analysis	Heat transfer correlation
แหล่งต้นตำรับ	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
ชื่อเรียกอื่น	lumped mass analysis, lumped system analysis	epsilon-NTU method, effectiveness method
ที่เกี่ยวข้อง	3	3
สรุป	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.