In this paper, the heat transfer characteristics of nanofluid nucleate and film boiling are studied experimentally. For this purpose, Al₂O₃ and SiO₂ ethanol-based nanofluids prepared with three volumetric concentrations of 0.1 %, 0.3 %, and 0.5 %. The boiling experiments were conducted on a circular and polished copper surface with a diameter of 25 mm. The results showed that the addition of nanoparticles to the base fluid reduced the heat transfer coefficient of nucleate boiling. The critical heat flux of ethanol-based nanofluids was significantly higher than that of pure ethanol. The Al₂O₃ ethanol-based nanofluid with a volumetric concentration of 0.5 % had the best performance, with a critical heat flux of 42.36 % higher than that of pure ethanol. The presence of nanoparticles in the ethanol-based nanofluid improved the heat transfer coefficient of film boiling. The results showed that the stable film boiling for nanofluids starts at higher wall superheat temperature difference than pure ethanol. Among the investigated concentrations, volumetric concentration of 0.5 % had the best performance for both nanofluids, so that the minimum heat flux of Al₂O₃ and SiO₂ ethanol-based nanofluids were increased by 45.96 % and 45.67 % compared to pure ethanol, respectively.

本文通过实验研究了纳米流体核的热传递特性和薄膜沸腾。为此，制备具有三种体积浓度为0.1％，0.3％和0.5％的Al ₂ O ₃和SiO ₂乙醇基纳米流体。在直径为25 mm的圆形抛光铜表面上进行沸腾实验。结果表明，向基液中添加纳米颗粒降低了核沸腾的传热系数。乙醇基纳米流体的临界热通量显着高于纯乙醇。铝₂ O ₃乙醇基纳米流体的体积浓度为0.5％时性能最佳，其临界热通量比纯乙醇高42.36％。乙醇基纳米流体中纳米颗粒的存在改善了薄膜沸腾的传热系数。结果表明，与纯乙醇相比，纳米流体的稳定膜沸腾始于更高的壁过热温度差。在所研究的浓度中，0.5％的体积浓度对两种纳米流体均具有最佳性能，因此，与纯乙醇相比，Al ₂ O ₃和SiO ₂乙醇基纳米流体的最小热通量分别增加了45.96％和45.67％。 。