摘要
针对三氯化铝反应炉余热回收装置传热效率低的问题,采取在余热回收管内插入螺旋肋的强化传热技术。利用数值模拟方法,探究改变螺旋肋结构参数对余热回收管内流体传热性能与流动阻力特性的影响。研究结果表明:改变螺旋头数c、螺旋导程s、肋高宽比b/a对管内努塞尔数Nu和阻力系数f均有不同程度的影响。综合传热性能使用综合评价因子PEC进行评价,较高雷诺数下增加螺旋头数c或减小导程s使综合传热性能下降;在给定雷诺数范围内适当提升高宽比b/a可有效提高综合传热性能。
Aiming at the low heat transfer efficiency of waste heat recovery unit of aluminum trichloride reactor,the enhanced heat transfer technology by inserting spiral rib in the waste heat recovery tube was adopted.The effects of changing spiral rib structure parameters on fluid heat transfer and flow resistance in waste heat recovery tube were investigated by numerical simulation.The results show that the Nussel number Nu and the resistance coefficient f in the tube are affected by changing the number of screw heads c,the lead s and the ratio of rib height to width b/a.The comprehensive heat transfer performance was evaluated by PEC.Increasing the number of spiral heads c or decreasing the lead s at higher Reynolds number decreased the comprehensive heat transfer performance.The comprehensive heat transfer performance can be effectively improved by appropriately increasing the aspect ratio b/a within the given range of Reynolds number.
作者
田一皓
虞斌
李佳豪
王风录
许蕾
Tian Yihao;Yu Bin;Li Jiahao;Wang Fenglu;Xu Lei(School of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing,Jiangsu 211816,China)
出处
《化工设备与管道》
CAS
北大核心
2023年第4期34-41,共8页
Process Equipment & Piping
关键词
三氯化铝
强化传热技术
数值模拟PEC
aluminum chloride
enhanced heat transfer technology
numerical simulation
PEC
