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Performance Assessment of Solar Air Heater Channel with Inclined Groove Turbulators |
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| รหัสดีโอไอ | |
| Creator | 1. N. Koolnapadol 2. P. Promvonge 3. C. Khanoknaiyakarn 4. P. Promthaisong 5. P. Hoonpong 6. A. Chaimanatsakun 7. S. Gururatana 8. S. Skullong |
| Title | Performance Assessment of Solar Air Heater Channel with Inclined Groove Turbulators |
| Publisher | Thai Society of Mechanical Engineers (TSME) |
| Publication Year | 2568 |
| Journal Title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| Journal Vol. | 13 |
| Journal No. | 2 |
| Page no. | JRAME-25-13-016 (p.1-11) |
| Keyword | Heat transfer, Solar air heater, Thermal performance, Inclined groove |
| URL Website | https://ph01.tci-thaijo.org/index.php/jrame/index |
| Website title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| ISSN | 2229-2152 |
| Abstract | An experimental investigation was carried out to explore the thermal performance and frictional loss features in a solar air heater (SAH) channel that was intentionally roughened on the absorber surface using multiple inclined groove turbulators. The working fluid, air, flows into the SAH channel, which has a consistent surface heat flux for Reynolds numbers (Re) varying between 5290 and 22,600 in the current research. Thermal characteristics at a single inclination angle (a = 45°) are investigated in this research by comparing the effects of three distinct relative groove frequencies (P/H=PR=0.8, 1.2 and 1.6) and groove depth ratios (D/H=DR=0.16, 0.24 and 0.32). The findings highlight that the employ of inclined grooves results in a noticeable rise in Nusselt number (Nu) from 1.24 to 2.82 times relative to the smooth absorber plate (smooth channel), as well as a 1.88 to 7.9 times increase in friction factor (f). The Nu and f show an increasing trend when Re increases, whereas the opposite pattern occurs as DR and PR increase. At PR = 0.8 and DR = 0.32, the inclined groove roughness has the largest thermal effectiveness factor (TEF) of around 1.64. The Nu and f correlations, which are functions of inclined groove features, have also been established. |
