LAPSE:2024.1304
Published Article
LAPSE:2024.1304
Numerical Study of a Heat Exchanger with a Rotating Tube Using Nanofluids under Transitional Flow
June 21, 2024
Improvements in heat exchanger thermal efficiency are crucial for achieving energy use and cost reductions. The use of nanofluids and the rotation of the exchanger inner tube may enhance heat transfer and exchanger efficiency. In this work, after having performed experiments on such a heat exchanger, a three dimensional numerical model was developed to simulate the transitional forced convection flow of a horizontal double-tube heat exchanger, with the aim of obtaining insight into the effects of the inner tube rotation, fluid flow rate and type of nanofluid employed. It was found that an increase in the nanoparticle concentration up to 3% increased the exchanger efficiency. Al2O3, Al2O3-Cu and Cu-water nanofluids were studied, with the Cu-water being the fluid with the best performance (19.33% improvement). Heat transfer was enhanced with inner tube rotation up to 500 rpm (41.2%). Nevertheless, pressure drop and friction values were increased due to both phenomena, leading to higher pumping power values for the operation of the heat exchanger. Hence, a balance between the performance and pumping power increase must be considered when modifications are made on a heat exchanger. The development of the numerical model might help in further optimizing, redesigning and scaling up heat exchangers.
Keywords
concentric tube, heat transfer, hybrid nanofluids, NTU, single-phase flow
Subject
Suggested Citation
Mohamed MAEM, Meana-Fernández A, González-Caballín JM, Bowman A, Gutiérrez-Trashorras AJ. Numerical Study of a Heat Exchanger with a Rotating Tube Using Nanofluids under Transitional Flow. (2024). LAPSE:2024.1304
Author Affiliations
Mohamed MAEM: Department of Mechanical Engineering, College of Engineering, Horus University, New Damietta 34518, Egypt
Meana-Fernández A: Department of Energy, Escuela Politécnica de Ingeniería de Gijón, Edificio Departamental Este, University of Oviedo, 33204 Gijón, Spain [ORCID]
González-Caballín JM: Department of Energy, Escuela Politécnica de Ingeniería de Gijón, Edificio Departamental Este, University of Oviedo, 33204 Gijón, Spain [ORCID]
Bowman A: Department of Mechanical Engineering, Marquette University, Milwaukee, WI 53233, USA
Gutiérrez-Trashorras AJ: Department of Energy, Escuela Politécnica de Ingeniería de Gijón, Edificio Departamental Este, University of Oviedo, 33204 Gijón, Spain [ORCID]
Journal Name
Processes
Volume
12
Issue
1
First Page
222
Year
2024
Publication Date
2024-01-19
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr12010222, Publication Type: Journal Article
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LAPSE:2024.1304
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doi:10.3390/pr12010222
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Jun 21, 2024
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CC BY 4.0
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Jun 21, 2024
 
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