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	熱交換器の熱性能を、理論的に可能な最大熱伝達に対する比率で測定する代替アプローチであるEffectiveness-NTU法。	熱抵抗ネットワーク
分野	熱力学	熱力学
系統	Process / pipeline	Process / pipeline
提唱年	1984	1985
提唱者	William Kays and Alvin London	Frank Incropera and David DeWitt
種類	Heat transfer correlation	Heat transfer network analysis
原典	Kays, W. M., & London, A. L. (1984). Compact Heat Exchangers (3rd ed.). McGraw-Hill. ISBN: 978-0070334007	Incropera, F. P., DeWitt, D. P., Bergman, T. L., & Lavine, A. S. (2007). Fundamentals of Heat and Mass Transfer (6th ed.). Wiley. ISBN: 978-0470055540
別名	epsilon-NTU method, effectiveness method	thermal circuit analogy, thermal network
関連	3	3
概要	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.	The Thermal Resistance Network method uses electrical circuit analogy to solve heat transfer problems. It treats heat flow as analogous to electric current, thermal resistance analogous to electrical resistance, and temperature difference analogous to voltage potential. This powerful conceptual framework enables engineers to analyze complex multi-layer heat transfer systems systematically.