Numerical insight into heat transfer enhancement by granules inner-migration in a moving bed:A performance comparison between slanted-stick and plow-shaped agitator  

作　　者：Binfan Jiang Hao Pei Dehong Xia Haiyang Wang 

机构地区：[1]School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Shunde Graduate School of University of Science and Technology Beijing,Guangdong 528399,China [3]Jianlong Group&USTB Joint Laboratory,Beijing 100083,China

出　　处：《Particuology》2024年第6期109-116,共8页颗粒学报（英文版）

基　　金：supported by National Natural Science Foundation of China(grant Nos.52106070,52276048);Guangdong Basic and Applied Basic Research Foundation(grant No.2020A1515111014);Fundamental Research Funds for the Central Universities(grant No.FRF-TP-20-058A1,FRF-EYIT-23-07).

摘　　要：Waste heat recovery of high-temperature granules is one of the most promising sustainable energy supply and carbon reduction ways for industry.A moving bed indirect heat exchanger(MBIHE)with inner-migration was proposed for granular heat recovery.Granule migration and the enhanced heat transfer induced by two types of agitators(i.e.,agitator with slanted stick A_(s)and with plow-shaped surface A_(p))in the MBIHE are analyzed based on DEM coupled with CFD.Owing to the effective agitation,the average heat transfer coefficient in the granule side is enhanced to∼3 times compared to that without agitation.The heat recovery efficiency in the moving bed reached more than 70%with the agitations of either A_(s)or A_(p).The heat efficiency of A_(s)is∼7%higher than that of A_(p),but with at least 60%greater rotational torque.To ensure reliable agitation,the A_(p)is suggested to be adopted in the MBIHE to induce granule migration.

关 键 词：Waste heat recovery High-temperature granule Granule migration Heat transfer enhancement Industry energy saving 

分 类 号：TK124[动力工程及工程热物理—工程热物理]