Thermal Performance Analysis of PCM Capsules Packed-Bed System with Biomimetic Leaf Hierarchical Porous Structure

作     者：DONG Yan WANG Fuqiang YANG Luwei SHI Xuhang ZHANG Guoliang SHUAI Yong DONG Yan;WANG Fuqiang;YANG Luwei;SHI Xuhang;ZHANG Guoliang;SHUAI Yong

作者机构：School of New EnergyHarbin Institute of Technology at WeihaiWeihai 264209China School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2021年第30卷第5期

页      面：1559-1571页

核心收录：

学科分类：080703[工学-动力机械及工程] 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）] 0702[理学-物理学] 

基　　金：This work was supported by the National Key R&D Program of China(No.2018YFA0702300) the National Natural Science Foundation of China(Grant No.52076064) the Taishan Scholars of Shandong Province(tsqn201812105) 

主　　题：solar energy thermal energy storage packed bed biomimetic phase change hierarchical porous structure 

摘      要：As an efficient natural selection nutrient transport system,biomimetic leaf hierarchical porous structure has unique advantages in material transportation and energy *** leaf hierarchical porous structure has been widely used in solar thermochemical reactions,photocatalysis,and energy *** improve the thermal efficiency and reduce the power consumption,the authors introduce the idea of bionic leaf hierarchical porous structure packed-bed latent heat thermal energy storage(LHTES)*** the same porosity,the diameter of the PCM capsules is designed to change along the flow direction to optimize the thermal *** effects of velocity on temperature distribution,pressure drop,liquid fraction,and thermal storage capacity of the conventional uniform model and bionic leaf hierarchical porous model are *** results show that the bionic leaf hierarchical porous structure can thin the thickness of the thermocline,reduce the pressure drop,increase the heat transfer area,and improve the thermal response of the packed-bed compared with the conventional uniform *** maximum increases of liquid fraction and completion rate are 36.6%and 20.3%with pressure drop reduction of 25 Pa,*** maximum decrease of the above-melting point(MP)thermocline is 51.7%as *** results provide suggestions to optimize the packed-bed LHTES system and improve its thermal performance under practical conditions.