The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications
Natural circulation loops with double pipe heat exchangers at heating and cooling ends have a potential to be used in the refrigeration systems as an alternative to suction line heat exchangers. The heat transfer capability of such natural circulation loops depends on the geometrical parameters as w...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | International Journal of Thermofluids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202722000155 |
| _version_ | 1818240776855879680 |
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| author | Nur Çobanoğlu Alireza Banisharif Patrice Estellé Ziya Haktan Karadeniz |
| author_facet | Nur Çobanoğlu Alireza Banisharif Patrice Estellé Ziya Haktan Karadeniz |
| author_sort | Nur Çobanoğlu |
| collection | DOAJ |
| description | Natural circulation loops with double pipe heat exchangers at heating and cooling ends have a potential to be used in the refrigeration systems as an alternative to suction line heat exchangers. The heat transfer capability of such natural circulation loops depends on the geometrical parameters as well as thermophysical properties of the working fluid. This study aims to investigate the effect of water-ethylene glycol mixture based Fe3O4 nanofluids (0.01, 0.05 and 0.1 vol.%) on the annular flow propagation and heat transfer in the annuli of double pipe heat exchanger at low pressure side of the refrigeration cycle. In addition to increased non-dimensional velocity values due to the lower viscosity and higher non-dimensional temperature values with expanded temperature gradient, improved heat transfer by nanofluids shows that they can be used as secondary heat transfer fluids at low-pressure side in refrigeration systems. Although the maximum transferred (13.6% improvement compared to base fluid) heat observed for the highest concentration, the nanofluids with smallest concentration has the minimum pressure drop value (25% reduction compared to base fluid) and the highest performance evaluation criteria (PEC) value (PEC = 1.08) with tiny increase in exergy destruction (1.45% compared to base fluid). |
| first_indexed | 2024-12-12T13:18:49Z |
| format | Article |
| id | doaj.art-ef748d3cd8b04fb4bd4010fb12085831 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-12-12T13:18:49Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-ef748d3cd8b04fb4bd4010fb120858312022-12-22T00:23:22ZengElsevierInternational Journal of Thermofluids2666-20272022-05-0114100149The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applicationsNur Çobanoğlu0Alireza Banisharif1Patrice Estellé2Ziya Haktan Karadeniz3Graduate School of Natural and Applied Sciences, İzmir Kâtip Çelebi University, 35620, İzmir, Turkey; Corresponding author.Chimie-Physique (MRC), Université Libre de Bruxelles, 1050, Brussels, BelgiumUniv Rennes 1, LGCGM, 35704 Rennes, FranceDepartment of Energy Systems Engineering, İzmir Institute of Technology, 35430, İzmir, TurkeyNatural circulation loops with double pipe heat exchangers at heating and cooling ends have a potential to be used in the refrigeration systems as an alternative to suction line heat exchangers. The heat transfer capability of such natural circulation loops depends on the geometrical parameters as well as thermophysical properties of the working fluid. This study aims to investigate the effect of water-ethylene glycol mixture based Fe3O4 nanofluids (0.01, 0.05 and 0.1 vol.%) on the annular flow propagation and heat transfer in the annuli of double pipe heat exchanger at low pressure side of the refrigeration cycle. In addition to increased non-dimensional velocity values due to the lower viscosity and higher non-dimensional temperature values with expanded temperature gradient, improved heat transfer by nanofluids shows that they can be used as secondary heat transfer fluids at low-pressure side in refrigeration systems. Although the maximum transferred (13.6% improvement compared to base fluid) heat observed for the highest concentration, the nanofluids with smallest concentration has the minimum pressure drop value (25% reduction compared to base fluid) and the highest performance evaluation criteria (PEC) value (PEC = 1.08) with tiny increase in exergy destruction (1.45% compared to base fluid).http://www.sciencedirect.com/science/article/pii/S2666202722000155NanofluidsRefrigeration systemAnnular flowDeveloping laminar flow |
| spellingShingle | Nur Çobanoğlu Alireza Banisharif Patrice Estellé Ziya Haktan Karadeniz The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications International Journal of Thermofluids Nanofluids Refrigeration system Annular flow Developing laminar flow |
| title | The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications |
| title_full | The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications |
| title_fullStr | The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications |
| title_full_unstemmed | The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications |
| title_short | The developing flow characteristics of water - ethylene glycol mixture based Fe3O4 nanofluids in eccentric annular ducts in low temperature applications |
| title_sort | developing flow characteristics of water ethylene glycol mixture based fe3o4 nanofluids in eccentric annular ducts in low temperature applications |
| topic | Nanofluids Refrigeration system Annular flow Developing laminar flow |
| url | http://www.sciencedirect.com/science/article/pii/S2666202722000155 |
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