Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance
Abstract Nanofluids have demonstrated significant potential to improve the efficiency of heat transfer systems, particularly in refrigeration applications. This study experimentally investigates the effects of Fe3O4 nanoparticles (0.15% mass fraction) dispersed in POE RL32-3MAF compressor oil on the...
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-07567-5 |
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| author | Mahdi Mohseni Amir Hossein Fathollahi |
| author_facet | Mahdi Mohseni Amir Hossein Fathollahi |
| author_sort | Mahdi Mohseni |
| collection | DOAJ |
| description | Abstract Nanofluids have demonstrated significant potential to improve the efficiency of heat transfer systems, particularly in refrigeration applications. This study experimentally investigates the effects of Fe3O4 nanoparticles (0.15% mass fraction) dispersed in POE RL32-3MAF compressor oil on the performance of a 5-ton R22 vapor compression chiller, alongside the impact of outdoor temperature variations (33–39 °C). System parameters were monitored at four critical points in the refrigeration cycle (evaporator outlet, compressor outlet, condenser outlet, and expansion valve outlet) under both nanofluid-enhanced and base oil conditions. Key findings reveal that the nanolubricant enhances cooling capacity by 5% and improves the coefficient of performance (COP) by 2% on average, despite a marginal 3% increase in compressor power consumption. Outdoor temperature exhibited a pronounced influence, with each 2 °C rise reducing COP by approximately 10%. Furthermore, the compressor’s electrical input power consistently exceeded its thermodynamic power by 10%, with the discrepancy intensifying at higher ambient temperatures. These results highlight the dual role of nanolubricants in boosting system efficiency while mitigating performance degradation under thermal load variations. |
| format | Article |
| id | doaj-art-4712c8a8809b49c58e291b6296b3110b |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-4712c8a8809b49c58e291b6296b3110b2025-08-20T03:37:31ZengNature PortfolioScientific Reports2045-23222025-07-0115111810.1038/s41598-025-07567-5Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performanceMahdi Mohseni0Amir Hossein Fathollahi1Department of Mechanical Engineering, Qom University of TechnologyDepartment of Mechanical Engineering, Qom University of TechnologyAbstract Nanofluids have demonstrated significant potential to improve the efficiency of heat transfer systems, particularly in refrigeration applications. This study experimentally investigates the effects of Fe3O4 nanoparticles (0.15% mass fraction) dispersed in POE RL32-3MAF compressor oil on the performance of a 5-ton R22 vapor compression chiller, alongside the impact of outdoor temperature variations (33–39 °C). System parameters were monitored at four critical points in the refrigeration cycle (evaporator outlet, compressor outlet, condenser outlet, and expansion valve outlet) under both nanofluid-enhanced and base oil conditions. Key findings reveal that the nanolubricant enhances cooling capacity by 5% and improves the coefficient of performance (COP) by 2% on average, despite a marginal 3% increase in compressor power consumption. Outdoor temperature exhibited a pronounced influence, with each 2 °C rise reducing COP by approximately 10%. Furthermore, the compressor’s electrical input power consistently exceeded its thermodynamic power by 10%, with the discrepancy intensifying at higher ambient temperatures. These results highlight the dual role of nanolubricants in boosting system efficiency while mitigating performance degradation under thermal load variations.https://doi.org/10.1038/s41598-025-07567-5Mini compression chillerOutdoor temperatureNanolubricantExperimental studyCOP |
| spellingShingle | Mahdi Mohseni Amir Hossein Fathollahi Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance Scientific Reports Mini compression chiller Outdoor temperature Nanolubricant Experimental study COP |
| title | Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance |
| title_full | Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance |
| title_fullStr | Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance |
| title_full_unstemmed | Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance |
| title_short | Experimental investigation of Fe3O4 nano-oil and outdoor temperature effects on a 5-ton R22 vapor compression chiller performance |
| title_sort | experimental investigation of fe3o4 nano oil and outdoor temperature effects on a 5 ton r22 vapor compression chiller performance |
| topic | Mini compression chiller Outdoor temperature Nanolubricant Experimental study COP |
| url | https://doi.org/10.1038/s41598-025-07567-5 |
| work_keys_str_mv | AT mahdimohseni experimentalinvestigationoffe3o4nanooilandoutdoortemperatureeffectsona5tonr22vaporcompressionchillerperformance AT amirhosseinfathollahi experimentalinvestigationoffe3o4nanooilandoutdoortemperatureeffectsona5tonr22vaporcompressionchillerperformance |