Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid
This study investigates the enhancement of thermal performance in Evacuated Tube Solar Collectors (ETCs) by integrating graphene nanoparticles into the heat transfer fluid. Improvement the efficiency of ETCs is crucial for maximizing solar energy utilization, particularly in regions with diverse cli...
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| Format: | Article |
| Language: | English |
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Babol Noshirvani University of Technology
2025-07-01
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| Series: | Iranica Journal of Energy and Environment |
| Subjects: | |
| Online Access: | https://www.ijee.net/article_208097_313a6962a09845689feb0ecbff27b0ab.pdf |
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| author | S. Y. Afshoon R. Shafaghat M. Gorji Bandpy |
| author_facet | S. Y. Afshoon R. Shafaghat M. Gorji Bandpy |
| author_sort | S. Y. Afshoon |
| collection | DOAJ |
| description | This study investigates the enhancement of thermal performance in Evacuated Tube Solar Collectors (ETCs) by integrating graphene nanoparticles into the heat transfer fluid. Improvement the efficiency of ETCs is crucial for maximizing solar energy utilization, particularly in regions with diverse climatic conditions. To achieve this, we conducted experiments comparing the thermal performance of the ETC under two conditions: with and without graphene nanoparticles, and at varying flow rates of condenser water (5, 10, 15, and 20 L/h) in an open space in Babol, northern Iran, over two periods in August 2022. Measurements included ambient temperature, input and output water temperatures, heat pipe temperature, and water flow rate. Key performance indicators, such as the average Nusselt number, useful heat output, and convection heat transfer, were calculated. The results indicate that the Nusselt number increased by 10.64% and overall thermal performance improved when utilizing the acetone-graphene nanofluid at a flow rate of 20 L/h under vacuum conditions (-0.6 bar) with a volume fraction of 0.08% nanoparticles. This work demonstrates a significant enhancement in thermal energy storage capabilities of ETCs, showcasing the potential of nanofluids in solar thermal applications, thereby contributing novel insights into the engineering optimization of solar collectors. |
| format | Article |
| id | doaj-art-7d2dd93e314b4a21a364987575be3a57 |
| institution | Kabale University |
| issn | 2079-2115 2079-2123 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Babol Noshirvani University of Technology |
| record_format | Article |
| series | Iranica Journal of Energy and Environment |
| spelling | doaj-art-7d2dd93e314b4a21a364987575be3a572025-01-22T10:46:58ZengBabol Noshirvani University of TechnologyIranica Journal of Energy and Environment2079-21152079-21232025-07-0116340041210.5829/ijee.2025.16.03.02208097Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene NanofluidS. Y. Afshoon0R. Shafaghat1M. Gorji Bandpy2Faculty of Mechanical Engineering, Sea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranFaculty of Mechanical Engineering, Sea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranFaculty of Mechanical Engineering, Sea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, IranThis study investigates the enhancement of thermal performance in Evacuated Tube Solar Collectors (ETCs) by integrating graphene nanoparticles into the heat transfer fluid. Improvement the efficiency of ETCs is crucial for maximizing solar energy utilization, particularly in regions with diverse climatic conditions. To achieve this, we conducted experiments comparing the thermal performance of the ETC under two conditions: with and without graphene nanoparticles, and at varying flow rates of condenser water (5, 10, 15, and 20 L/h) in an open space in Babol, northern Iran, over two periods in August 2022. Measurements included ambient temperature, input and output water temperatures, heat pipe temperature, and water flow rate. Key performance indicators, such as the average Nusselt number, useful heat output, and convection heat transfer, were calculated. The results indicate that the Nusselt number increased by 10.64% and overall thermal performance improved when utilizing the acetone-graphene nanofluid at a flow rate of 20 L/h under vacuum conditions (-0.6 bar) with a volume fraction of 0.08% nanoparticles. This work demonstrates a significant enhancement in thermal energy storage capabilities of ETCs, showcasing the potential of nanofluids in solar thermal applications, thereby contributing novel insights into the engineering optimization of solar collectors.https://www.ijee.net/article_208097_313a6962a09845689feb0ecbff27b0ab.pdfevacuated tube solar collectornanoparticlenusselt numberphase changethermal conduction |
| spellingShingle | S. Y. Afshoon R. Shafaghat M. Gorji Bandpy Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid Iranica Journal of Energy and Environment evacuated tube solar collector nanoparticle nusselt number phase change thermal conduction |
| title | Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid |
| title_full | Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid |
| title_fullStr | Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid |
| title_full_unstemmed | Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid |
| title_short | Experimental Investigation of Average Nusselt Number Variations in a Heat Pipe-Evacuated Tube Solar Collector due to Presence of Acetone-Graphene Nanofluid |
| title_sort | experimental investigation of average nusselt number variations in a heat pipe evacuated tube solar collector due to presence of acetone graphene nanofluid |
| topic | evacuated tube solar collector nanoparticle nusselt number phase change thermal conduction |
| url | https://www.ijee.net/article_208097_313a6962a09845689feb0ecbff27b0ab.pdf |
| work_keys_str_mv | AT syafshoon experimentalinvestigationofaveragenusseltnumbervariationsinaheatpipeevacuatedtubesolarcollectorduetopresenceofacetonegraphenenanofluid AT rshafaghat experimentalinvestigationofaveragenusseltnumbervariationsinaheatpipeevacuatedtubesolarcollectorduetopresenceofacetonegraphenenanofluid AT mgorjibandpy experimentalinvestigationofaveragenusseltnumbervariationsinaheatpipeevacuatedtubesolarcollectorduetopresenceofacetonegraphenenanofluid |