Application of Superhydrophobic Surface on Boiling Heat Transfer Characteristics of Nanofluids

作     者：Cong Qi Yuxing Wang Zi Ding Jianglin Tu Mengxin Zhu 

作者机构：School of Electrical and Power EngineeringChina University of Mining and TechnologyXuzhou221116China 

出 版 物：《Energy Engineering》 (能源工程（英文）)

年 卷 期：2021年第118卷第4期

页      面：825-852页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：financially supported by“National Natural Science Foundation of China”(Grant No.51606214) “Natural Science Foundation of Jiangsu Province,China”(Grant No.BK20181359). 

主　　题：Nanofluids superhydrophobic surface pool boiling heat transfer numerical simulation 

摘      要：Boiling heat transfer is a mode using the phase change of working medium to strengthen the heat exchange due to its good heat exchange capability,and it is widely used in heat exchange engineering.Nanofluids have been used in the direction of enhanced heat transfer for their superior thermophysical property.The wetting,spreading and ripple phenomena of superhydrophobic surfaces widely exist in nature and daily life.It has great application value for engineering technology.In this article,the boiling heat exchange characteristics of nanofluids on superhydrophobic surface are numerically studied.It was found that with the increase of superheating degree,the steam volume ratio of unmodified heated surface increases to saturation,while the steam volume and evaporation ratio of modified superhydrophobic surface increase firstly and then decrease.At the same time,bubbles are generated and accumulated more fully on superhydrophobic surface.It was also found that nanofluids with low viscosity are more affected by superhydrophobic surface characteristics,and the increase is more significant with high superheating degree,and the superhydrophobic surface is beneficial to enhancing boiling heat exchange.Compared with the simulation results,it could be concluded that the boiling heat exchange performance of CuO-water nano-fluids on the modified superhydrophobic surface is better than that of CuO-ethylene glycol nanofluids under high superheating degree.