Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids
The objective of the work is to obtain the outlet temperatures of the fluids in a shell and tube heat exchanger. The second law of thermodynamics is applied through the concepts of efficiency, effectiveness, and irreversibility to analyze the results. Water flows in the shell, and a mixture of water...
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| Language: | English |
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Sumy State University
2020-12-01
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| Series: | Журнал інженерних наук |
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| Online Access: | http://jes.sumdu.edu.ua/wp-content/uploads/2020/08/jes_7_2_2020_F1-F7.pdf |
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| author | Nogueira E. |
| author_facet | Nogueira E. |
| author_sort | Nogueira E. |
| collection | DOAJ |
| description | The objective of the work is to obtain the outlet temperatures of the fluids in a shell and tube heat exchanger. The second law of thermodynamics is applied through the concepts of efficiency, effectiveness, and irreversibility to analyze the results. Water flows in the shell, and a mixture of water-ethylene glycol is associated with fractions of nanoparticles flows in the tube. Water enters the shell at 27 °C, and the mixture comes to the tube at 90 °C. The mass flow is kept fixed in the shell, equal to 0.23 kg/s, and varies between 0.01 kg/s to 0.50 kg/s. Volume fractions equal to 0.01, 0.10, and 0.25 were considered for analysis, for both nanoparticles from Ag and Al2O3. Results for Reynolds number, heat transfer rate, efficiency, effectiveness, and irreversibility are presented for critique, discussion, and justification of the output data found. It is shown that the flow regime has a significant effect on the performance of the analyzed heat exchanger. |
| format | Article |
| id | doaj-art-bc1e5c5a6b89460b802a8cf1f5b2f6ec |
| institution | Kabale University |
| issn | 2312-2498 2414-9381 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | Sumy State University |
| record_format | Article |
| series | Журнал інженерних наук |
| spelling | doaj-art-bc1e5c5a6b89460b802a8cf1f5b2f6ec2025-08-20T03:48:41ZengSumy State UniversityЖурнал інженерних наук2312-24982414-93812020-12-0172F1F710.21272/jes.2020.7(2).f1Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluidsNogueira E.0Department of Mechanics and Energy, State University of Rio de Janeiro, BrazilThe objective of the work is to obtain the outlet temperatures of the fluids in a shell and tube heat exchanger. The second law of thermodynamics is applied through the concepts of efficiency, effectiveness, and irreversibility to analyze the results. Water flows in the shell, and a mixture of water-ethylene glycol is associated with fractions of nanoparticles flows in the tube. Water enters the shell at 27 °C, and the mixture comes to the tube at 90 °C. The mass flow is kept fixed in the shell, equal to 0.23 kg/s, and varies between 0.01 kg/s to 0.50 kg/s. Volume fractions equal to 0.01, 0.10, and 0.25 were considered for analysis, for both nanoparticles from Ag and Al2O3. Results for Reynolds number, heat transfer rate, efficiency, effectiveness, and irreversibility are presented for critique, discussion, and justification of the output data found. It is shown that the flow regime has a significant effect on the performance of the analyzed heat exchanger.http://jes.sumdu.edu.ua/wp-content/uploads/2020/08/jes_7_2_2020_F1-F7.pdfthermodynamicssecond lawethylene glycolvolume fraction |
| spellingShingle | Nogueira E. Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids Журнал інженерних наук thermodynamics second law ethylene glycol volume fraction |
| title | Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids |
| title_full | Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids |
| title_fullStr | Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids |
| title_full_unstemmed | Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids |
| title_short | Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids |
| title_sort | thermal performance in heat exchangers by the irreversibility effectiveness and efficiency concepts using nanofluids |
| topic | thermodynamics second law ethylene glycol volume fraction |
| url | http://jes.sumdu.edu.ua/wp-content/uploads/2020/08/jes_7_2_2020_F1-F7.pdf |
| work_keys_str_mv | AT nogueirae thermalperformanceinheatexchangersbytheirreversibilityeffectivenessandefficiencyconceptsusingnanofluids |