Porovnat metody
Prohlédněte si vybrané metody vedle sebe; řádky, které se liší, jsou zvýrazněny.
| Log Mean Temperature Difference× | Metoda účinnosti a NTU× | |
|---|---|---|
| Obor | Termodynamika | Termodynamika |
| Rodina | Process / pipeline | Process / pipeline |
| Rok vzniku≠ | 1950 | 1984 |
| Tvůrce≠ | Donald Kern | William Kays and Alvin London |
| Typ | Heat transfer correlation | Heat transfer correlation |
| Původní zdroj≠ | Kern, D. Q. (1950). Process Heat Transfer. McGraw-Hill. link ↗ | Kays, W. M., & London, A. L. (1984). Compact Heat Exchangers (3rd ed.). McGraw-Hill. ISBN: 978-0070334007 |
| Další názvy | LMTD, logarithmic mean temperature difference | epsilon-NTU method, effectiveness method |
| Příbuzné | 3 | 3 |
| Shrnutí≠ | The Log Mean Temperature Difference (LMTD) method is a fundamental tool for calculating heat transfer rates in heat exchangers. It defines the effective temperature difference between two fluids as the logarithmic average of the temperature differences at the inlet and outlet. This method enables engineers to size and analyze heat exchangers systematically using the basic heat transfer equation Q = U A LMTD. | 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. |
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