Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach
In this paper, four new turbulator models are implemented inside the absorber tube of the Parabolic Trough Solar Collector (PTSC) in a linear arrangement (anchored shape) to regulate and standardize its surface temperature. The study analyzes the impact of parameters such as heat transfer coefficien...
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2025-01-01
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| Series: | International Journal of Thermofluids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202724004671 |
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| author | M. Gholinia A.H. Ghobadi E. Shahcheraghi M. Armin |
| author_facet | M. Gholinia A.H. Ghobadi E. Shahcheraghi M. Armin |
| author_sort | M. Gholinia |
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| description | In this paper, four new turbulator models are implemented inside the absorber tube of the Parabolic Trough Solar Collector (PTSC) in a linear arrangement (anchored shape) to regulate and standardize its surface temperature. The study analyzes the impact of parameters such as heat transfer coefficient (h), friction factor (f), Nusselt number (Nu), and outlet temperature (Tout). Moreover, a new type of nanofluid (GAGNPs/H2O) has been utilized, consisting of gallic acid combined with graphene nanoplatelets (GNPs), known for its environmental friendliness. The solar heat flux (SHF) in the environment is calculated using the Monte Carlo Radiation Transfer Method (MCRT) with C++ code. The key findings indicate that at Reynolds number 25,000, replacing the simple absorber tube with the DEA, DEA-f, FEA, and FEA-f models increases the Nusselt number by ∼3.99 %, ∼5.40 %, ∼14.08 %, and ∼16.20 %, respectively. Additionally, increasing fin height from 34 mm to 58 mm at this Reynolds number results in ∼ 18.26 % increase in the Nusselt number, while increasing the outlet temperature by ∼0.08 %. Increasing the top height from 34 mm to 58 mm can increase efficiency by up to 8.20 %. The efficiency of the PTSC decreased by approximately ∼3.04 % when the inlet temperature was increased from 300 K to 345 K in FEA-f turbulator (H: 58 mm). Furthermore, increasing the concentration of GAGNPs/H2O nanofluid from 0.025 % to 0.1 % in the same FEA-f turbulator (H: 58 mm) resulted in ∼ 4.50 % increase in efficiency. |
| format | Article |
| id | doaj-art-556a1a799b85413da6608c1f1d2f5714 |
| institution | Kabale University |
| issn | 2666-2027 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj-art-556a1a799b85413da6608c1f1d2f57142025-01-08T04:53:39ZengElsevierInternational Journal of Thermofluids2666-20272025-01-0125101028Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approachM. Gholinia0A.H. Ghobadi1E. Shahcheraghi2M. Armin3Department of Mechanical Engineering, Babol Noushirvani University of Technology, Babol, Iran; Corresponding author.Department of Mechanical Engineering, Brunel University London, UK; Department of Mechanical Engineering, Mazandaran University of Science and Technology, Babol, IranDepartment of Mechanical Engineering, Babol Noushirvani University of Technology, Babol, Iran; Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, IranDepartment of Mechanical Engineering, Mazandaran University of Science and Technology, Babol, Iran; Institute of Technical Combustion, Leibniz University Hannover, GermanyIn this paper, four new turbulator models are implemented inside the absorber tube of the Parabolic Trough Solar Collector (PTSC) in a linear arrangement (anchored shape) to regulate and standardize its surface temperature. The study analyzes the impact of parameters such as heat transfer coefficient (h), friction factor (f), Nusselt number (Nu), and outlet temperature (Tout). Moreover, a new type of nanofluid (GAGNPs/H2O) has been utilized, consisting of gallic acid combined with graphene nanoplatelets (GNPs), known for its environmental friendliness. The solar heat flux (SHF) in the environment is calculated using the Monte Carlo Radiation Transfer Method (MCRT) with C++ code. The key findings indicate that at Reynolds number 25,000, replacing the simple absorber tube with the DEA, DEA-f, FEA, and FEA-f models increases the Nusselt number by ∼3.99 %, ∼5.40 %, ∼14.08 %, and ∼16.20 %, respectively. Additionally, increasing fin height from 34 mm to 58 mm at this Reynolds number results in ∼ 18.26 % increase in the Nusselt number, while increasing the outlet temperature by ∼0.08 %. Increasing the top height from 34 mm to 58 mm can increase efficiency by up to 8.20 %. The efficiency of the PTSC decreased by approximately ∼3.04 % when the inlet temperature was increased from 300 K to 345 K in FEA-f turbulator (H: 58 mm). Furthermore, increasing the concentration of GAGNPs/H2O nanofluid from 0.025 % to 0.1 % in the same FEA-f turbulator (H: 58 mm) resulted in ∼ 4.50 % increase in efficiency.http://www.sciencedirect.com/science/article/pii/S2666202724004671Parabolic trough solar collector (PTSC)Eco-friendly nanofluidNusselt numberfriction factorAnchor-shaped turbulator |
| spellingShingle | M. Gholinia A.H. Ghobadi E. Shahcheraghi M. Armin Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach International Journal of Thermofluids Parabolic trough solar collector (PTSC) Eco-friendly nanofluid Nusselt number friction factor Anchor-shaped turbulator |
| title | Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach |
| title_full | Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach |
| title_fullStr | Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach |
| title_full_unstemmed | Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach |
| title_short | Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach |
| title_sort | thermofluids analysis of four novel anchor shaped turbulator and eco friendly nanofluid gagnps h2o in a parabolic trough solar collector a cfd modeling approach |
| topic | Parabolic trough solar collector (PTSC) Eco-friendly nanofluid Nusselt number friction factor Anchor-shaped turbulator |
| url | http://www.sciencedirect.com/science/article/pii/S2666202724004671 |
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