방법 비교

	Effectiveness-NTU 방법	증기 압축 사이클
분야	열역학	열역학
계열	Process / pipeline	Process / pipeline
기원 연도	1984	1834
창시자	William Kays and Alvin London	Jacob Perkins
유형	Heat transfer correlation	Thermodynamic cycle
원전	Kays, W. M., & London, A. L. (1984). Compact Heat Exchangers (3rd ed.). McGraw-Hill. ISBN: 978-0070334007	Stoecker, W. F., Jones, J. W., & Sunnam, B. A. (1998). Refrigeration and Air Conditioning (2nd ed.). McGraw-Hill. ISBN: 978-0070613638
별칭	epsilon-NTU method, effectiveness method	refrigeration cycle, heat pump cycle
관련	3	3
요약	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 Vapor Compression Cycle is the fundamental thermodynamic cycle for refrigeration systems and heat pumps. It describes how mechanical work is used to transfer heat from a cold space (evaporator) to a warm space (condenser), operating against the natural temperature gradient. The cycle consists of four processes: isentropic compression, isobaric condensation, isenthalpic throttling, and isobaric evaporation.