光伏正银粉连续合成过程建模与影响因素分析  

Modeling and Key Factors Analysis of the Reactive Flow for Silver Powder Synthesis in Photovoltaic Application

作　　者：朱泽鹏 廖亚琴[2] 张易阳[3] 杨隽[2] 刘萍 赵瑞 李水清[1] ZHU Zepeng;LIAO Yaqin;ZHANG Yiyang;YANG Jun;LIU Ping;ZHAO Rui;LI Shuiqing(Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;Central R&D Institute,Dongfang Electric Corporation,Chengdu 611731,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学能源与动力工程系,北京100084 [2]东方电气中央研究院,成都611731 [3]清华大学核能与新能源技术研究院,北京100084

出　　处：《工程热物理学报》2024年第11期3369-3374,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52276156);东方电气中央研究院企业委托项目。

摘　　要：银粉作为光伏电池栅线的重要材料,对太阳能效率有直接影响。本文发展反应流动数值模拟与离散区间法颗粒群平衡模型高效结合的方法,研究了抗坏血酸还原剂化学还原法连续合成微米正银粉体过程,探究了流动、混合、化学反应和颗粒形核、生长等过程的相互影响规律。研究发现反应器混合效果好,反应pH值通过抗坏血酸电离控制反应速率,从而影响前驱体消耗在成核与生长过程中的配比,进而影响最终出口颗粒总数与平均粒径。Silver powder is one of the most important materials used in photovoltaic applications,for its impact on the total efficiency and cost.In this work,we numerically studied the chemical reduction synthesis of silver powder by the combined method of CFD simulation and discrete sectional population balance modeling.The processes of flow,mixing,chemical reaction,nucleation and particle growth were analyzed as well as their effects on the size distribution of final products.The results show a well effect of mixing.The reaction rate is controlled by the ionization of ascorbic acid and highly depended on solution pH value,influences the distributed proportion of nucleation and surface growth,and determines the final powder size distribution.

关 键 词：光伏正银 化学还原法 反应流模拟 成核与生长 

分 类 号：TB44[一般工业技术] TM914.4[电气工程—电力电子与电力传动]