Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis
The present paper highlights heat transfer and entropy generation due to mixed convection for an inclined channel. The channel is heated by its upper wall and cooled by two jets of nanofluids penetrating through its lower wall. The studied configuration is chosen to model, in qualitative way, a cool...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23002873 |
| _version_ | 1797832682437083136 |
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| author | Naifa S. Alatawi Abeer M. Almutairi S.A. Khalil Asma Obaidallah Alatawi Wejdan Al-Anazi Mourad Magherbi |
| author_facet | Naifa S. Alatawi Abeer M. Almutairi S.A. Khalil Asma Obaidallah Alatawi Wejdan Al-Anazi Mourad Magherbi |
| author_sort | Naifa S. Alatawi |
| collection | DOAJ |
| description | The present paper highlights heat transfer and entropy generation due to mixed convection for an inclined channel. The channel is heated by its upper wall and cooled by two jets of nanofluids penetrating through its lower wall. The studied configuration is chosen to model, in qualitative way, a cooling system for photovoltaic panel. The set of partial differential equations that governing the flow was numerically solved using COMSOL software. Effects of the inclination angle of the channel, Reynolds number and nanoparticles fraction, on heat transfer, hydrodynamic and created entropy are examined. The inclination angle, the Reynolds number and the nanoparticle fraction are ranging from 0° to 30°, from 50 to 150 and from 0% to 8% respectively. It was found that the effect of the angle of inclination, on heat transfer and thermal irreversibility, is weak and that it cannot exceed 2%. Whereas the nanofluid concentration and the Reynolds numbers alter at once the created entropy and the heat transfer. Results show an increase of nearly 15% of Nusselt number and thermal irreversibility when the nanoparticle concentration reaches 8%. The local irreversibility maps reveal that the created entropy is significantly localized at the impact locations of the cooling jets. Since irreversibility is synonymous with the aging of the system, which naturally leads to usury, it can be concluded that the channel may be damaged at these locations. |
| first_indexed | 2024-04-09T14:12:47Z |
| format | Article |
| id | doaj.art-2d4fc9618127417cacad4d5beb23b99b |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-09T14:12:47Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-2d4fc9618127417cacad4d5beb23b99b2023-05-06T04:38:08ZengElsevierCase Studies in Thermal Engineering2214-157X2023-05-0145102981Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysisNaifa S. Alatawi0Abeer M. Almutairi1S.A. Khalil2Asma Obaidallah Alatawi3Wejdan Al-Anazi4Mourad Magherbi5Physics Department, Faculty of Science, University of Tabuk, 71421, Saudi ArabiaPhysics Department, Faculty of Science, University of Tabuk, 71421, Saudi ArabiaDepartment of Chemistry, Alwajh College, University of Tabuk, Tabuk, Saudi ArabiaDepartment of Chemistry, Faculty of Science, University of Science, University of Tabuk, 71474, Tabuk, Saudi ArabiaDepartment of Computer Science, Faculty of Computers and Information Technology, University of Tabuk, Tabuk, 71491, Saudi ArabiaDepartment of Chemical Engineering, Engineers National School, Gabes University, 6029, Gabes, Tunisia; Corresponding author.The present paper highlights heat transfer and entropy generation due to mixed convection for an inclined channel. The channel is heated by its upper wall and cooled by two jets of nanofluids penetrating through its lower wall. The studied configuration is chosen to model, in qualitative way, a cooling system for photovoltaic panel. The set of partial differential equations that governing the flow was numerically solved using COMSOL software. Effects of the inclination angle of the channel, Reynolds number and nanoparticles fraction, on heat transfer, hydrodynamic and created entropy are examined. The inclination angle, the Reynolds number and the nanoparticle fraction are ranging from 0° to 30°, from 50 to 150 and from 0% to 8% respectively. It was found that the effect of the angle of inclination, on heat transfer and thermal irreversibility, is weak and that it cannot exceed 2%. Whereas the nanofluid concentration and the Reynolds numbers alter at once the created entropy and the heat transfer. Results show an increase of nearly 15% of Nusselt number and thermal irreversibility when the nanoparticle concentration reaches 8%. The local irreversibility maps reveal that the created entropy is significantly localized at the impact locations of the cooling jets. Since irreversibility is synonymous with the aging of the system, which naturally leads to usury, it can be concluded that the channel may be damaged at these locations.http://www.sciencedirect.com/science/article/pii/S2214157X23002873Heat transferCreated entropyMixed convectionNanofluidChannel |
| spellingShingle | Naifa S. Alatawi Abeer M. Almutairi S.A. Khalil Asma Obaidallah Alatawi Wejdan Al-Anazi Mourad Magherbi Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis Case Studies in Thermal Engineering Heat transfer Created entropy Mixed convection Nanofluid Channel |
| title | Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis |
| title_full | Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis |
| title_fullStr | Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis |
| title_full_unstemmed | Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis |
| title_short | Qualitative modeling of solar panel cooling by nanofluid jets: Heat transfer and second law analysis |
| title_sort | qualitative modeling of solar panel cooling by nanofluid jets heat transfer and second law analysis |
| topic | Heat transfer Created entropy Mixed convection Nanofluid Channel |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23002873 |
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