Details
| Original language | English |
|---|---|
| Article number | 101028 |
| Number of pages | 17 |
| Journal | International Journal of Thermofluids |
| Volume | 25 |
| Early online date | 17 Dec 2024 |
| Publication status | Published - Jan 2025 |
Abstract
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.
Keywords
- Anchor-shaped turbulator, Eco-friendly nanofluid, friction factor, Nusselt number, Parabolic trough solar collector (PTSC)
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
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In: International Journal of Thermofluids, Vol. 25, 101028, 01.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector
T2 - A CFD modeling approach
AU - Gholinia, M.
AU - Ghobadi, A. H.
AU - Shahcheraghi, E.
AU - Armin, M.
N1 - Publisher Copyright: © 2024
PY - 2025/1
Y1 - 2025/1
N2 - 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.
AB - 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.
KW - Anchor-shaped turbulator
KW - Eco-friendly nanofluid
KW - friction factor
KW - Nusselt number
KW - Parabolic trough solar collector (PTSC)
UR - http://www.scopus.com/inward/record.url?scp=85212927437&partnerID=8YFLogxK
U2 - 10.1016/j.ijft.2024.101028
DO - 10.1016/j.ijft.2024.101028
M3 - Article
AN - SCOPUS:85212927437
VL - 25
JO - International Journal of Thermofluids
JF - International Journal of Thermofluids
M1 - 101028
ER -