Abstract
The main objective of this study is to consider the existence of a thermodynamic irreversibility extrema for fully developed laminar heat transfer and fluid flow through different cross-sectional, free-flow area ducts. The evaluation of thermodynamic trade-offs caused by simultaneous heat transfer at a finite temperature difference, and by fluid friction will be emphasized in terms of the dimensionless entropy generation as a performance criterion. A set of duct geometries under investigation included circular, rectangular, square, triangular, sine, and finned circular ducts. The pragmatical goal of the analysis is to establish the mutual relationship between the results using either the conventional area goodness factor, or the thermodynamic performance evaluation criterion. The computed results show that performance criteria may contradict each other. The quantitative results for the set of parameters under investigation show that the improvement and/or deterioration of the performance of one geometry in respect to the other depend on Reynolds number and inlet temperature ratio for a given fluid and fluid flow length.
Original language | English |
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Pages | 1-9 |
Number of pages | 9 |
State | Published - 1994 |
Event | Proceedings of the 1994 International Mechanical Engineering Congress & Exhibition, of the Winter Annual Meeting - Chicago, IL, USA Duration: Nov 6 1994 → Nov 11 1994 |
Conference
Conference | Proceedings of the 1994 International Mechanical Engineering Congress & Exhibition, of the Winter Annual Meeting |
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City | Chicago, IL, USA |
Period | 11/6/94 → 11/11/94 |
ASJC Scopus subject areas
- Mechanical Engineering