Optimization of fluid flow and internal geometric structure of volumes cooled by forced convection in an array of parallel tubes
This paper reports the optimization of a heat sink composed of parallel tubes in a solid matrix of fixed dimensions for the following cases: (i) fixed pressure drop; (ii) fixed pumping power and (iii) fixed heat transfer rate density. The method of the intersection of asymptotes is employed using th...
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| Format: | article |
| Language: | por |
| Published: |
2012
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| Online Access: | http://hdl.handle.net/10174/3797 |
| Country: | Portugal |
| Oai: | oai:dspace.uevora.pt:10174/3797 |
| Summary: | This paper reports the optimization of a heat sink composed of parallel tubes in a solid matrix of fixed dimensions for the following cases: (i) fixed pressure drop; (ii) fixed pumping power and (iii) fixed heat transfer rate density. The method of the intersection of asymptotes is employed using the dimensionless thermal length (x⁄) as primary optimization variable, and approximate theoretical expressions for predicting the optimum ratio of diameter to tube length (D/L) are presented for each case. When the system is optimized with fixed heat transfer density it is found that the optimum values of both x⁄ and D/L are very close to those that correspond to the joint minimization of pressure drop and pumping power. Theseresults are validated and complemented by means of numerical simulations. |
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