Characteristics of Axial and Radial Development of Solids Holdup in a Countercurrent Fluidized Bed Particle Solar Receiver

作     者：JIANG Kaijun WANG Fengli KONG Yanqiang XU Chao DU Xiaoze JIANG Kaijun;WANG Fengli;KONG Yanqiang;XU Chao;DU Xiaoze

作者机构：MOE Key Laboratory of Power Station Energy Transfer Conversion and SystemNorth China Electric Power UniversityBeijing 102206China School of Energy and Power EngineeringLanzhou University of TechnologyLanzhou 730050China 

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

年 卷 期：2021年第30卷第6期

页      面：2223-2240页

核心收录：

学科分类：08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.52130607 and 52090062) 

主　　题：concentrated solar power particle solar receiver countercurrent fluidized bed optical fiber probe local solids holdup 

摘      要：A novel particle solar receiver(PSR)with gas-solids countercurrent fluidized bed(CCFB)was *** cold-mold prototype was set up to investigate the gas-solids flow structure by using optical fiber *** local solids holdup distribution,its evolution with various operating conditions and the fluctuations of the local flow structures were investigated *** results show that the novel CCFB can achieve much higher solids holdup(~9%)compared to the traditional downer ones(~l%).The solid particles are mainly distributed in the near-wall region and the particles are more difficult to get a fully developed state in the near-wall *** excellent gas-solids mixing and contacting demonstrated by the standard deviation and intermittency index means a better wall-to-bed heat transfer *** distribution of the solid particles in the CCFB transport tube is revealed,which can provide a significant reference for the structure design of the hot-mold ***,the research can fill in the research gap in the gas-solids counterflow field.