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<p>In this study, the thermal performance of a triple-tube heat exchanger integrated with a turbulator is investigated through computational fluid dynamics (CFD) simulations. Fluids are flowing in a counterflow pattern through the three concentric pipes, with a turbulator placed in the innermost pipe. A ternary hybrid nanofluid (THNF) is employed as the cold fluid, and water is used as the hot and normal fluids to operate the triple-tube heat exchanger. The effects of the number of turbulator turns (5, 10, 15, and 30) and the concentration of ternary hybrid nanofluid (THNF) (0.12% and 0.06%) on the effectiveness and pressure drop are systematically investigated and compared with and without the turbulator. The results indicate that increasing the number of turbulator turns enhances the effectiveness, accompanied by a corresponding rise in pressure drop. The improvements in effectiveness are 457% (30 turns), 271% (15 turns), and 164% (10 turns) relative to the plain tube configuration. An increase in the concentration of nanoparticles increases the effectiveness and pressure drop. The increase in effectiveness of 5% and 3.5% is determined with 0.12% and 0.06% THNF relative to water.</p>

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Numerical investigation on hydrothermal characteristics of Turbulator-Integrated triple-tube heat exchanger with ternary hybrid nanofluid

  • 期刊论文

  • 发表日期：

    2026年3月22日

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  • Akash B. Raut,
  • Rahul Tarodiya,
  • Vilas R. Kalamkar,
  • Ranjeet Rai,
  • Vikas Verma

摘要

In this study, the thermal performance of a triple-tube heat exchanger integrated with a turbulator is investigated through computational fluid dynamics (CFD) simulations. Fluids are flowing in a counterflow pattern through the three concentric pipes, with a turbulator placed in the innermost pipe. A ternary hybrid nanofluid (THNF) is employed as the cold fluid, and water is used as the hot and normal fluids to operate the triple-tube heat exchanger. The effects of the number of turbulator turns (5, 10, 15, and 30) and the concentration of ternary hybrid nanofluid (THNF) (0.12% and 0.06%) on the effectiveness and pressure drop are systematically investigated and compared with and without the turbulator. The results indicate that increasing the number of turbulator turns enhances the effectiveness, accompanied by a corresponding rise in pressure drop. The improvements in effectiveness are 457% (30 turns), 271% (15 turns), and 164% (10 turns) relative to the plain tube configuration. An increase in the concentration of nanoparticles increases the effectiveness and pressure drop. The increase in effectiveness of 5% and 3.5% is determined with 0.12% and 0.06% THNF relative to water.