Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids
This paper reports an experimental investigation of the heat transfer features of new and recycled Alumina (Al<sub>2</sub>O<sub>3</sub>) nanofluids (NFs) in the pool boiling (PB) system. The mixture of ethylene glycol (EG) and distilled water (DW) is selected as the base flui...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/6/1040 |
| _version_ | 1797609772558581760 |
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| author | Wagd Ajeeb S. M. Sohel Murshed |
| author_facet | Wagd Ajeeb S. M. Sohel Murshed |
| author_sort | Wagd Ajeeb |
| collection | DOAJ |
| description | This paper reports an experimental investigation of the heat transfer features of new and recycled Alumina (Al<sub>2</sub>O<sub>3</sub>) nanofluids (NFs) in the pool boiling (PB) system. The mixture of ethylene glycol (EG) and distilled water (DW) is selected as the base fluid (BF), and NFs samples of two low concentrations (0.01 and 0.05 vol.%) of Al<sub>2</sub>O<sub>3</sub> nanoparticles were prepared. Furthermore, the characteristics of the prepared NFs are evaluated to investigate the heat transfer performance as well as the reusability of the NFs for long-term applications and recycling consideration. Although there have been a large number of boiling studies with NFs, the current study is the first of its kind that addresses the mentioned operation conditions of recycling NF samples. The results are compared with the relevant BF in terms of properties, critical heat flux (CHF), burnout heat flux (BHF), and the convection coefficient of the Al<sub>2</sub>O<sub>3</sub> NFs in the PB system. The results showed good enhancements in both CHF and BHF of these NFs yielding up to 60% and 54% for BHF at 0.05 vol.%, respectively. The reusage of the previously used (recycled) Al<sub>2</sub>O<sub>3</sub> NF showed a considerable increase in heat transfer performance compared to base fluids but slightly lower than the newly prepared one. The results of the reused nanofluids demonstrate the great prospects of their recyclability in heat transfer systems and processes such as in pool boiling. |
| first_indexed | 2024-03-11T06:05:04Z |
| format | Article |
| id | doaj.art-51ec01cb67964766be6336d4c6435d57 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T06:05:04Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-51ec01cb67964766be6336d4c6435d572023-11-17T13:00:41ZengMDPI AGNanomaterials2079-49912023-03-01136104010.3390/nano13061040Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina NanofluidsWagd Ajeeb0S. M. Sohel Murshed1IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, PortugalIDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, PortugalThis paper reports an experimental investigation of the heat transfer features of new and recycled Alumina (Al<sub>2</sub>O<sub>3</sub>) nanofluids (NFs) in the pool boiling (PB) system. The mixture of ethylene glycol (EG) and distilled water (DW) is selected as the base fluid (BF), and NFs samples of two low concentrations (0.01 and 0.05 vol.%) of Al<sub>2</sub>O<sub>3</sub> nanoparticles were prepared. Furthermore, the characteristics of the prepared NFs are evaluated to investigate the heat transfer performance as well as the reusability of the NFs for long-term applications and recycling consideration. Although there have been a large number of boiling studies with NFs, the current study is the first of its kind that addresses the mentioned operation conditions of recycling NF samples. The results are compared with the relevant BF in terms of properties, critical heat flux (CHF), burnout heat flux (BHF), and the convection coefficient of the Al<sub>2</sub>O<sub>3</sub> NFs in the PB system. The results showed good enhancements in both CHF and BHF of these NFs yielding up to 60% and 54% for BHF at 0.05 vol.%, respectively. The reusage of the previously used (recycled) Al<sub>2</sub>O<sub>3</sub> NF showed a considerable increase in heat transfer performance compared to base fluids but slightly lower than the newly prepared one. The results of the reused nanofluids demonstrate the great prospects of their recyclability in heat transfer systems and processes such as in pool boiling.https://www.mdpi.com/2079-4991/13/6/1040pool boilingcritical heat fluxburnout heat fluxnanofluidsrecycling |
| spellingShingle | Wagd Ajeeb S. M. Sohel Murshed Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids Nanomaterials pool boiling critical heat flux burnout heat flux nanofluids recycling |
| title | Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids |
| title_full | Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids |
| title_fullStr | Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids |
| title_full_unstemmed | Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids |
| title_short | Pool Boiling Heat Transfer Characteristics of New and Recycled Alumina Nanofluids |
| title_sort | pool boiling heat transfer characteristics of new and recycled alumina nanofluids |
| topic | pool boiling critical heat flux burnout heat flux nanofluids recycling |
| url | https://www.mdpi.com/2079-4991/13/6/1040 |
| work_keys_str_mv | AT wagdajeeb poolboilingheattransfercharacteristicsofnewandrecycledaluminananofluids AT smsohelmurshed poolboilingheattransfercharacteristicsofnewandrecycledaluminananofluids |