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Measurement and predictions for the flow distribution of a complex duct system with loop for energy saving
Author(s) -
Lee SeungChul,
Lee JaeHeon,
Oh MyungDo
Publication year - 2001
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.679
Subject(s) - duct (anatomy) , loop (graph theory) , mechanics , control theory (sociology) , flow (mathematics) , energy (signal processing) , energy flow , environmental science , physics , thermodynamics , mathematics , computer science , statistics , biology , control (management) , anatomy , artificial intelligence , combinatorics
The characteristics of flow distribution in a complex duct system have been investigated in this paper by three means: the experimental measurement, the numerical simulation and the extended T‐method analysis. While the exit flow rates predicted by the three‐dimensional CFD calculation and those given by the experiment show close agreement, the extended T‐method results are found to differ from the experiment by −22.2 to 26.3 per cent for the same exits. These discrepancies may be attributed to the underlying limitation concerning the fitting loss coefficients, which is that the flow in front of the fittings is fully developed. It is proposed that further improvements to the fitting loss coefficients should be made in order to analyse the flow distributions in complex duct systems by one‐dimensional analysis such as the extended T‐method. Copyright © 2001 John Wiley & Sons, Ltd.