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HEAT TRANSFER AND FRICTION FACTOR OF FLAT PLATE SOLAR COLLECTOR WITH Al2O3 -CuO/WATER HYBRID NANOFLUIDS: EXPERIMENTAL AND ANN PREDICTIONS
Authors:
Solomon Mesfin1,2
, Veeredhi Vasudeva Rao2
, L. Syam Sundar3
,
Kotturu V.V. Chandra Mouli4
1Department of Mechanical Engineering, University of Gondar, Gondar, Ethiopia
2Department of Mechanical, Bioresources and Biomedical Engineering, School of Engineering, CSET,
University of South Africa (UNISA), South Africa
3Department of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, Al-
Khobar, 31952, Saudi Arabia
4Department of Mechanical and Industrial Engineering, College of Engineering, Majmaah University, Al-
Majmaah, 11952, Saudi Arabia
Received: 15 August 2024
Revised: 2 October 2024
Accepted: 10 October 2024
Published: 31 March 2025
Abstract:
The Nusselt number, heat transfer, and friction factor of flat plate collector working with Al2O3-CuO/water hybrid nanofluids were estimated experimentally, and the obtained data is used for the artificial neural network- Support Vector Regression method. Experiments were conducted from 09:00 to 16:30 hr, with volume loadings of 0.048%, 0.096%, 0.144%, 0.192% and 0.24%, respectively. The entire region is divided into time zone 1 (09:00 hr to 13:00 hr) and time zone 2 (13:00 hr to 16:30 hr). Results show the time zone-1, at 13:00 hrs, at 0.24% vol. and a Reynolds number of 364.66, the Nusselt number is enhanced by 20.43%, and at time zone-2, at 16:30 hrs, at 0.24% vol., and at Reynolds number of 211.23, the Nusselt number is enhanced by 14.08%, respectively, over the base fluid. Similarly, for time zone-1 and time zone-2, at 13:00 hrs and 16:30 hrs, at 0.24% vol. and at Reynolds number 364.66 and 211.23, the friction factor is enhanced by 15.34% and 11.50%, respectively, over the base fluid. The employed support vector regression algorithm accurately predicts the values with experimental data. The correlation coefficients found for the Nusselt number, heat transfer, and friction factor are 0.99497, 0.9947, and 0.99955, respectively.
Keywords:
Flat plate solar collector, Heat transfer coefficient, Friction factor, Nusselt number, Enhancement, Hybrid
nanofluids, ANN analysis
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© 2025 by the authors. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
Volume 10
Number 1
March 2025
Last Edition
Volume 10
Number 1
March 2025
How to Cite
S. Mesfin, V.V. Rao, L.S. Sundar, K.V.V. Chandra Mouli, Heat Transfer and Friction Factor of Flat Plate Solar Collector With Al2O3-CuO/Water Hybrid Nanofluids: Experimental and ANN Predictions. Applied Engineering Letters, 10(1), 2025: 1-13.
https://doi.org/10.46793/aeletters.2025.10.1.1
More Citation Formats
Mesfin, S., Rao, V.V., Sundar, L.S., & Chandra Mouli, K.V.V. (2025). Heat Transfer and Friction Factor of Flat Plate Solar Collector With Al2O3-CuO/Water Hybrid Nanofluids: Experimental and ANN Predictions. Applied Engineering Letters, 10(1), 1-13.
https://doi.org/10.46793/aeletters.2025.10.1.1
Mesfin, Solomon, et al. “Heat Transfer and Friction Factor of Flat Plate Solar Collector With Al2O3-CuO/Water Hybrid Nanofluids: Experimental and ANN Predictions.“ Applied Engineering Letters, vol. 10, no. 1, 2025, pp. 1-13. https://doi.org/10.46793/aeletters.2025.10.1.1
Mesfin, Solomon, Veeredhi Vasudeva Rao, L. Syam Sundar, and Kotturu V.V. Chandra Mouli. 2025. “Heat Transfer and Friction Factor of Flat Plate Solar Collector With Al2O3-CuO/Water Hybrid Nanofluids: Experimental and ANN Predictions.“ Applied Engineering Letters, 10 (1): 1-13.
https://doi.org/10.46793/aeletters.2025.10.1.1
Mesfin, S., Rao, V.V., Sundar, L.S. and Chandra Mouli, K.V.V. (2025). Heat Transfer and Friction Factor of Flat Plate Solar Collector With Al2O3-CuO/Water Hybrid Nanofluids: Experimental and ANN Predictions. Applied Engineering Letters, 10(1), pp. 1-13.
doi: 10.46793/aeletters.2025.10.1.1.
Using lean manufacturing to improve process efficiency in a fabrication company
Authors:
Andra Maria Popa1
, Kapil Gupta1
1University of Johannesburg, Mechanical and Industrial Engineering Technology, Johannesburg, South Africa
Received: 29 June 2024
Revised: 20 September 2024
Accepted: 26 September 2024
Published: 30 September 2024
Abstract:
This article presents a case study on improving process efficiency in a mining equipment part fabrication company. The company was facing issues concerning communication, organisation, and workflow processes. This study investigated that ineffective communication among departments was the major weakness which was responsible for the long lead or idle time. This lead time was a waste that affected the company’s productivity. A great amount of time was spent on non-value-added processes. The Kanban Centralised Communication System was implemented. Time study and value stream mapping were also used. A significant improvement in process efficiency from 34% to 85% was achieved by reducing lead time from 4200 minutes to 1680 minutes after streamlining the communication in the company using Kanban.
Keywords:
Lean manufacturing, Kanban, Optimization, Process efficiency, Production lead time, Value stream mapping
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© 2024 by the author. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
Volume 10
Number 1
March 2025
Last Edition
Volume 10
Number 1
March 2025
How to Cite
V.H. Quan, Research and Optimization of Sport Utility Vehicle Aerodynamic Design. Applied Engineering Letters, 9(2), 2024: 105-115.
https://doi.org/10.46793/aeletters.2024.9.2.5
More Citation Formats
Quan, V.H. (2024). Research and Optimization of Sport Utility Vehicle Aerodynamic Design. Applied Engineering Letters, 9(2), 105-115.
https://doi.org/10.46793/aeletters.2024.9.2.5
Quan, Vu Hai, “Research and Optimization of Sport Utility Vehicle Aerodynamic Design.“ Applied Engineering Letters, vol. 9, no. 2, pp. 2024, 105-115.
https://doi.org/10.46793/aeletters.2024.9.2.5
Quan, Vu Hai, 2024. “Research and Optimization of Sport Utility Vehicle Aerodynamic Design.“ Applied Engineering Letters, 9 (2):105-115.
https://doi.org/10.46793/aeletters.2024.9.2.5
Quan, V.H. (2024). Research and Optimization of Sport Utility Vehicle Aerodynamic Design. Applied Engineering Letters, 9(2), pp. 105-115.
doi: 10.46793/aeletters.2024.9.2.5.