The present work aims to address the low thermal conductivity of CuO/water nanofluid due to the spherical shape of CuO nanoparticles by adding small amount of magnesium oxide (MgO) nanoparticles to the nanofluid. Novel CuO–MgO/water hybrid nanofluid has been synthesised and studied at different volume concentrations (0.125–1.25%) of 80% CuO and 20% MgO nanoparticles suspended in water at different range of temperatures from 25 to 50 °C on its thermal conductivity. The study demonstrated that increasing volume concentration of nanoparticles has enhanced the thermal conductivity, but drops slightly when the volume concentrations are above 1%. Furthermore, the results showed that the effect of temperature on thermal conductivity enhancement is similar to the effect of volume concentration, especially at higher temperatures. The highest enhancement of thermal conductivity of 16% was achieved at volume concentration of 1.25% and temperature of 50 °C. Furthermore, sensitivity analysis showed that the optimum condition to prepare the CuO–MgO/water hybrid nanofluid could be used in industrial applications at volume concentration of 0.75% and temperature of 50 °C. Finally, the study proposed an empirical correlation to measure the thermal conductivity of CuO–MgO/water hybrid nanofluid based on data experiments results.

目前的工作旨在通过向纳米流体中添加少量氧化镁 (MgO) 纳米粒子来解决由于 CuO 纳米粒子的球形形状而导致的 CuO/水纳米流体的低热导率。合成了新型 CuO-MgO/水杂化纳米流体，并研究了在不同体积浓度（0.125-1.25%）下悬浮在水中的 80% CuO 和 20% MgO 纳米颗粒在 25 到 50 °C 的不同温度范围内的热导率. 研究表明，增加纳米颗粒的体积浓度提高了热导率，但当体积浓度高于 1% 时，导热系数略有下降。此外，结果表明温度对热导率增强的影响类似于体积浓度的影响，尤其是在较高温度下。在 1.25% 的体积浓度和 50 °C 的温度下实现了 16% 的最高导热率增强。此外，灵敏度分析表明，制备 CuO-MgO/水杂化纳米流体的最佳条件可用于工业应用，体积浓度为 0.75%，温度为 50°C。最后，该研究基于数据实验结果提出了一种经验相关性来测量 CuO-MgO/水混合纳米流体的热导率。