Graphene nanosheets have attracted appreciable interest in heat transfer augmentation due to the unique deposition characteristics. The porous morphology of the graphene deposited on the heating surface via self‐assembly is reported to retard the transition boiling significantly. However, less attention has been paid to ameliorate the heat transfer coefficient (HTC) of graphene‐dispersed solutions. Herein, silver ions are introduced into graphene nanofluids to ameliorate its HTC. During boiling, graphene nanosheets and silver nanoparticles simultaneously deposit on the heating surface to form a well‐structured porous graphene/silver hybrid coating. The newly formed surface is characterized for surface morphology, wettability, and roughness. The new surface coating enhances the HTC by up to 109% and maintains the retarded critical heat flux of graphene‐only nanofluids. The application of the enhanced boiling heat transfer for the thermal management of concentrated photovoltaics is studied. It is demonstrated that enhanced boiling allows for cogeneration of electricity and heat from concentrated photovoltaics at approximately fourfold increased production rate while maintaining efficient, safe, and reliable operation.

中文翻译：

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自组装石墨烯/银杂化膜增强沸腾传热，用于集中光伏的热管理

石墨烯纳米片由于其独特的沉积特性而在传热增强方面引起了相当大的兴趣。据报道，通过自组装沉积在加热表面上的石墨烯的多孔形态显着地阻碍了过渡沸腾。但是，改善石墨烯分散溶液的传热系数（HTC）的关注却很少。在此，将银离子引入石墨烯纳米流体中以改善其HTC。在沸腾过程中，石墨烯纳米片和银纳米颗粒同时沉积在加热表面上，形成结构良好的多孔石墨烯/银杂化涂层。新形成的表面具有表面形态，润湿性和粗糙度的特征。新的表面涂层将HTC增强了109％，并保持了仅石墨烯的纳米流体的临界临界热通量。研究了增强沸腾传热在聚光光伏热管理中的应用。事实证明，提高沸腾度可以使聚光光伏电池产生的电能和热能以大约四倍的生产率提高，同时保持高效，安全和可靠的运行。