Effect of novel turbulators on the hydrothermal performance of counterflow double tube heat exchanger using nanofluids

Tavousi, Ebrahim and Perera, Noel and Flynn, Dominic and Hasan, Reaz and Rahman, Mostafizur (2024) Effect of novel turbulators on the hydrothermal performance of counterflow double tube heat exchanger using nanofluids. International Journal of Heat and Fluid Flow, 107. p. 109427. ISSN 0142-727X

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Double pipe heat exchangers are widely used across various industries. Enhancing their performance not only benefits these industries but also contributes to reduced fossil fuel consumption and pollution. This study employs the passive method with a combination turbulator insertion and nanofluid technique to enhance the heat transfer rate and improve the double tube heat exchanger performance. The novelty of this study lies in the use of new turbulator insertions and various nanofluids to investigate the heat transfer and fluid flow characteristics under laminar and counter flow configuration. The study examined four types of turbulator insertions, including triangular, rectangular, trapezoidal, and oval, in conjunction with CuO, SiO2, Al2O3 water-based nanofluids in a single-phase model. The findings revealed that the trapezoidal ribs exhibited higher Nusselt number and friction factor than the other rib shapes. Conversely, the oval ribs demonstrated a better performance evaluation criteria than the other rib shapes. Furthermore, the study explored different geometrical parameters such as rib width, height, and spacing, determining that rib height has the most significant impact on enhancing the heat transfer. The study achieved maximum performance evaluation criteria of 1.2 and 1.9 for SiO2 nanofluid without turbulator insertion and with turbulator insertion, respectively.

Item Type: Article
Identification Number: https://doi.org/10.1016/j.ijheatfluidflow.2024.109427
11 May 2024Accepted
17 May 2024Published Online
Uncontrolled Keywords: Double tube heat exchanger, Turbulator insertion, Nanofluid, Nusselt number, Heat transfer coefficient, Pressure drop,Thermal efficiency, Rib
Subjects: CAH10 - engineering and technology > CAH10-01 - engineering > CAH10-01-01 - engineering (non-specific)
Divisions: Faculty of Computing, Engineering and the Built Environment > College of Engineering
Depositing User: Gemma Tonks
Date Deposited: 06 Jun 2024 13:43
Last Modified: 20 Jun 2024 11:50
URI: https://www.open-access.bcu.ac.uk/id/eprint/15556

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