To improve the efficiency of heat exchanger systems for the purpose of reducing the size of the equipment and saving energy, the thermo-hydraulic performance of Fe₃O₄-water-arabic gum (AG) nanofluids in an improved heat exchange system is explored experimentally in this study. In the heat exchange system in these experiments, a corrugated tube is used instead of a smooth tube, a perforated turbulator is used instead of a smooth turbulator, and an adjustable magnetic field is applied. The effects of the magnetic flux density, nanoparticle mass fraction, arrangement of the magnetic field, shape of the turbulator, and Reynolds number on the thermal and hydraulic performance are analysed. In addition, a novel thermal efficiency index, R3, is proposed to analyse the comprehensive performance of each working condition. The experimental results reveal that a high nanoparticle mass fraction, high magnetic flux density, bilateral staggered magnetic field, and perforated turbulator can provide superior thermo-hydraulic performance. Further, nanofluids with a mass fraction of 0.5 wt% have the best thermo-hydraulic performance when using a bilateral staggered magnetic field and a perforated turbulator, and the thermal efficiency R3 reaches a peak when the Reynolds number is 7000.

为了提高热交换器系统的效率，以减小设备的尺寸并节省能源，实验研究了Fe ₃ O _4-水-阿拉伯胶（AG）纳米流体在改进的热交换系统中的热工性能。在这个研究中。在这些实验的热交换系统中，使用波纹管代替光滑管，使用多孔湍流器代替光滑湍流器，并施加可调磁场。分析了磁通密度，纳米颗粒质量分数，磁场布置，湍流器形状和雷诺数对热性能和水力性能的影响。另外，新的热效率指数R3，提出分析每种工况的综合性能。实验结果表明，高纳米粒子质量分数，高磁通密度，双向交错磁场和多孔湍流器可以提供出色的热工液压性能。此外，当使用双向交错磁场和多孔湍流器时，质量分数为0.5 wt％的纳米流体具有最佳的热工性能，而雷诺数为7000时，热效率R 3达到峰值。