| Autor: |
Assaye, Mebratu1 mebratu_assaye@dmu.edu.et, Biadgelegn, Muluken1, Fekadu, Birlie1 |
| Předmět: |
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| Zdroj: |
Cogent Engineering. 2022, Vol. 9 Issue 1, p1-14. 14p. |
| Abstrakt: |
Heat transfer devices have been employed in a wide range of industrial and home applications for heat conversion and recovery. Artificial roughness in the shape of repetitive ribs on a surface is a useful approach for improving heat transfer rates. The heat transfer and fluid flow properties of fully developed turbulent flow in a rectangular duct with repeated transverse semi-circular sectioned rib roughness on the absorber plate were investigated. A numerical solution has been done using fluent ANSYS 16 commercial software, and validation of result was carried out with Dittus–Boelter correlation. The numerical investigation of the thermal performance of a solar air heater was carried out at relative roughness pitch (between 7.14 and 17.86), Reynolds number (3800 and 18,000), heat flux (1000 W/m2), and constant relative roughness height (e/D = 0.042). For the analyzed range of parameters, it was found that the semi-circular transverse rib roughened duct with P/e = 10.71 and e/D = 0.042 provides the optimum thermo-hydraulic performance parameter. Within this optimum configuration, the maximum thermo-hydraulic performance parameter has been found to be 1.7328 at Reynolds number 15,000. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Library, Information Science & Technology Abstracts |
| Externí odkaz: |
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