Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach
Nanofluids have gained attention in recent years as a practical solution for enhancing thermal system performance. However, conjoint enhancement methods, such as fins and baffles, have shown further improvement in overall efficiency of systems. This paper explores the advancements of heat characte...
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University of Misan College of Engineering
2024-12-01
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| Series: | Misan Journal of Engineering Sciences |
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| Online Access: | https://uomisan.edu.iq/eng/mjes/index.php/eng/article/view/105 |
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| author | hayder Al-Lami Dheyaa S.J. Al-Saedi Ali A.H. AlMaidib Qudama Al-Yasiri |
| author_facet | hayder Al-Lami Dheyaa S.J. Al-Saedi Ali A.H. AlMaidib Qudama Al-Yasiri |
| author_sort | hayder Al-Lami |
| collection | DOAJ |
| description | Nanofluids have gained attention in recent years as a practical solution for enhancing thermal
system performance. However, conjoint enhancement methods, such as fins and baffles, have shown further
improvement in overall efficiency of systems. This paper explores the advancements of heat characteristics of a circular heat exchanger pipe with conical geometry baffles employing three nanofluid types, namely oxide (Al2O3), metallic (Fe), and carbon (Gr) based water. The baffled pipe was examined for varying nanofluid concentrations, represented by the volume fraction of nanoparticles in water (0.5%, 1%, and 1.5%) and exposed to a constant surface heat flux in turbulent flow conditions. The impact of various Reynolds numbers (Re), ranging from 5000 to 25000, on the thermal characteristics of the baffled heat exchanger pipe is studied. The numerical findings showed that employing nanofluids as an alternative working fluid to water has improved thermal properties considerably. Moreover, nanoparticles have increased the Nu of nanofluids compared to the usage of water. Significant improvements in the heat transfer coefficient were observed for all three nanofluids at a Reynolds number (Re) of 25000 and a nanoparticle concentration of 1.5%, compared to water. The Al2O3 -water nanofluid showed the most notable enhancement, with a 4.5% increase in the heat transfer coefficient. This improvement is due to the superior thermal conductivity of Al2O3 nanoparticles and their ability to induce localized turbulence within the fluid. Meanwhile, the Fe-water nanofluid demonstrated a 3.1% enhancement due to its metallic properties promoting better thermal energy transfer than the base fluid. Lastly, the Gr water nanofluid achieved a 1.4% increase, which, while lower than the other two, still indicates that carbon-based nanoparticles can provide a measurable boost in thermal performance under turbulent conditions |
| format | Article |
| id | doaj-art-ffdf7b4f79f24fb3919147103569ae23 |
| institution | Kabale University |
| issn | 2957-4242 2957-4250 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | University of Misan College of Engineering |
| record_format | Article |
| series | Misan Journal of Engineering Sciences |
| spelling | doaj-art-ffdf7b4f79f24fb3919147103569ae232025-01-16T14:57:56ZengUniversity of Misan College of EngineeringMisan Journal of Engineering Sciences2957-42422957-42502024-12-013213715510.61263/mjes.v3i2.105105Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approachhayder Al-Lami0Dheyaa S.J. Al-Saedi1Ali A.H. AlMaidib2Qudama Al-Yasiri3university of Misanuniversity of Misanuniversity of Misanuniversity of MisanNanofluids have gained attention in recent years as a practical solution for enhancing thermal system performance. However, conjoint enhancement methods, such as fins and baffles, have shown further improvement in overall efficiency of systems. This paper explores the advancements of heat characteristics of a circular heat exchanger pipe with conical geometry baffles employing three nanofluid types, namely oxide (Al2O3), metallic (Fe), and carbon (Gr) based water. The baffled pipe was examined for varying nanofluid concentrations, represented by the volume fraction of nanoparticles in water (0.5%, 1%, and 1.5%) and exposed to a constant surface heat flux in turbulent flow conditions. The impact of various Reynolds numbers (Re), ranging from 5000 to 25000, on the thermal characteristics of the baffled heat exchanger pipe is studied. The numerical findings showed that employing nanofluids as an alternative working fluid to water has improved thermal properties considerably. Moreover, nanoparticles have increased the Nu of nanofluids compared to the usage of water. Significant improvements in the heat transfer coefficient were observed for all three nanofluids at a Reynolds number (Re) of 25000 and a nanoparticle concentration of 1.5%, compared to water. The Al2O3 -water nanofluid showed the most notable enhancement, with a 4.5% increase in the heat transfer coefficient. This improvement is due to the superior thermal conductivity of Al2O3 nanoparticles and their ability to induce localized turbulence within the fluid. Meanwhile, the Fe-water nanofluid demonstrated a 3.1% enhancement due to its metallic properties promoting better thermal energy transfer than the base fluid. Lastly, the Gr water nanofluid achieved a 1.4% increase, which, while lower than the other two, still indicates that carbon-based nanoparticles can provide a measurable boost in thermal performance under turbulent conditionshttps://uomisan.edu.iq/eng/mjes/index.php/eng/article/view/105heat transfer; heat exchanger; nanofluid; fraction factor; turbulent flow. |
| spellingShingle | hayder Al-Lami Dheyaa S.J. Al-Saedi Ali A.H. AlMaidib Qudama Al-Yasiri Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach Misan Journal of Engineering Sciences heat transfer; heat exchanger; nanofluid; fraction factor; turbulent flow. |
| title | Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach |
| title_full | Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach |
| title_fullStr | Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach |
| title_full_unstemmed | Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach |
| title_short | Conjoint effect of nanofluids and baffles on a heat exchanger thermal performance: Numerical approach |
| title_sort | conjoint effect of nanofluids and baffles on a heat exchanger thermal performance numerical approach |
| topic | heat transfer; heat exchanger; nanofluid; fraction factor; turbulent flow. |
| url | https://uomisan.edu.iq/eng/mjes/index.php/eng/article/view/105 |
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