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On the Hydrothermal Behavior of Fluid Flow and Heat Transfer in a Helical Double-Tube Heat Exchanger with Curved Swirl Generator; Impacts of Length and Position

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  • Seyed Soheil Mousavi Ajarostaghi

    (Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
    Department of Mechanical Engineering, Babol Noshirvani University of Technology (BNUT), P.O. Box 484, Babol 47148-71167, Iran)

  • Seyed Hossein Hashemi Karouei

    (Department of Mechanical Engineering, Babol Noshirvani University of Technology (BNUT), P.O. Box 484, Babol 47148-71167, Iran)

  • Mehdi Alinia-kolaei

    (Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, P.O. Box 136-16785, Tehran 16788-15811, Iran)

  • Alireza Ahmadnejad Karimi

    (Department of Mechanical Engineering, Mazandaran Institute of Technology (MIT), P.O. Box 744, Babol 47481-61136, Iran)

  • Morteza Mohammad Zadeh

    (Department of Mechanical Engineering, Mazandaran University of Science and Technology (MUST), P.O. Box 734, Babol 47166-85635, Iran)

  • Kurosh Sedighi

    (Department of Mechanical Engineering, Babol Noshirvani University of Technology (BNUT), P.O. Box 484, Babol 47148-71167, Iran)

Abstract

The hydrothermal behavior in a helical double-tube heat exchanger is numerically estimated. A new type of swirl generator with two sections, including; outer curved blades and a semi-conical section with two holes in the inner section, is employed. Two geometrical factors, containing the length (L 1 ) and the position of the swirl generator (S), are used for investigation. The calculations were performed by a commercial FVM code, ANSYS FLUENT 18.2. The numerical outcomes show that a shorter length of the swirl generator leads to a better hydrothermal behavior. Accordingly, the model with L 1 = 100 mm at m ˙ = 0.008 kg/s achieves the maximum thermal performance by about 17.65, 53.85, and 100% enhancement compared to the models L 1 = 200, 300 mm, and without swirl generator. Among the different studied positions of the swirl generator, the maximum heat transfer coefficient and average Nusselt number in entire mass flow rates belong to the case with position S = 0.3π mm. Moreover, the thermal performance of the case with S = 0.3π mm is higher than cases with S = 0.1π mm, S = 0.5π mm, and without swirl generator by about 11.11, 53.84, and 100%, respectively.

Suggested Citation

  • Seyed Soheil Mousavi Ajarostaghi & Seyed Hossein Hashemi Karouei & Mehdi Alinia-kolaei & Alireza Ahmadnejad Karimi & Morteza Mohammad Zadeh & Kurosh Sedighi, 2023. "On the Hydrothermal Behavior of Fluid Flow and Heat Transfer in a Helical Double-Tube Heat Exchanger with Curved Swirl Generator; Impacts of Length and Position," Energies, MDPI, vol. 16(4), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1801-:d:1065395
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    References listed on IDEAS

    as
    1. Seyed Soheil Mousavi Ajarostaghi & Mohammad Zaboli & Hossein Javadi & Borja Badenes & Javier F. Urchueguia, 2022. "A Review of Recent Passive Heat Transfer Enhancement Methods," Energies, MDPI, vol. 15(3), pages 1-60, January.
    2. Ezoji, Hosein & Ajarostaghi, Seyed Soheil Mousavi, 2020. "Thermodynamic-CFD analysis of waste heat recovery from homogeneous charge compression ignition (HCCI) engine by Recuperative organic Rankine Cycle (RORC): Effect of operational parameters," Energy, Elsevier, vol. 205(C).
    3. Reza Norouztabar & Seyed Soheil Mousavi Ajarostaghi & Seyed Sina Mousavi & Payam Nejat & Seyed Saeid Rahimian Koloor & Mohamed Eldessouki, 2022. "On the Performance of a Modified Triple Stack Blade Savonius Wind Turbine as a Function of Geometrical Parameters," Sustainability, MDPI, vol. 14(16), pages 1-26, August.
    4. Rashidi, Saman & Hormozi, Faramarz & Sundén, Bengt & Mahian, Omid, 2019. "Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications," Applied Energy, Elsevier, vol. 250(C), pages 1491-1547.
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