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Overall heat transfer coefficient in the presence of the axial dispersion coefficient for a forced draught cooling tower
Author(s) -
Younis M. A.
Publication year - 1990
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440140202
Subject(s) - heat transfer coefficient , cooling tower , mechanics , thermodynamics , materials science , dispersion (optics) , heat transfer , coefficient of performance , water cooling , physics , heat exchanger , optics , refrigerant
An overall heat transfer coefficient was calculated for a forced draught counterflow cooling tower by using the pulse response technique. The presence of an axial dispersion coefficient for both gas and liquid was considered. Results indicate that, on neglecting the axial mixing and assuming a plug flow, the overall heat transfer coefficient is overestimated and can lead to errors in design applications.