This study investigates the effect of microstructured surface of brass and its morphology change due to the deposition of nanofluids in pool boiling process on heat transfer characteristics with pure deionized water and water-ethylene glycol at different volumetric concentrations. In addition, nanofluids are made of OH-based multiwall carbon nanotubes with base fluids listed in two volumetric percentages of 0.025 % and 0.1 %. On the microstructured surface, with increasing ethylene glycol concentration, the critical heat flux and heat transfer coefficient decreased, and the highest increase was related to deionized water boiling. On the microstructured surface in the presence of nanofluids with hybrid base fluids, the critical heat flux and heat transfer coefficient increased with increasing nanofluid concentration, and the highest increase was related to deionized water base nanofluid boiling at volumetric concentration of 0.1 %, which was 74.9 % and 91.8 %, respectively, compared to the boiling of deionized water on the microstructured surface. On the deposited microstructured surface by nanoparticles, the highest changes critical heat flux and heat transfer coefficient was related to deionized water base nanofluid boiling at volumetric concentration of 0.1 %, which was increased 18.98 % and decreased 48.6 %, respectively, compared to the boiling of deionized water on the microstructured surface without deposition.

本研究研究了黄铜微结构表面及其在池沸腾过程中纳米流体沉积引起的形貌变化对纯去离子水和水-乙二醇在不同体积浓度下传热特性的影响。此外，纳米流体由基于 OH 的多壁碳纳米管制成，基液按 0.025% 和 0.1% 两种体积百分比列出。在微结构表面，随着乙二醇浓度的增加，临界热通量和传热系数降低，其中最大的增加与去离子水沸腾有关。在纳米流体与混合基流体存在的微结构表面上，临界热通量和传热系数随着纳米流体浓度的增加而增加，最大的增加与体积浓度为 0.1% 的去离子水基纳米流体沸腾有关，与微结构表面上的去离子水沸腾相比，分别为 74.9% 和 91.8%。在纳米颗粒沉积的微结构表面上，临界热通量和传热系数的最大变化与体积浓度为 0.1 % 的去离子水基纳米流体沸腾有关，与沸腾相比分别增加了 18.98 % 和减少了 48.6 %。去离子水在微结构表面上没有沉积。