Numerical investigation of grooves effects on the thermal performance of helically grooved shell and coil tube heat exchanger  

作　　者：Mehdi Miansari Mehdi Rajabtabar Darvishi Davood Toghraie Pouya Barnoon Mojtaba Shirzad As'ad Alizadeh 

机构地区：[1]Department of Mechanical Engineering,Qaemshahr Branch,Islamic Azad University,Qaemshahr,Iran [2]Department of Mechanical Engineering,Khomeinishahr Branch,Islamic Azad University,Khomeinishahr,Iran [3]Department of Mechanical Engineering,Department of Mechanical Engineering,Babol Noshirvani University of Technology,Babol,Iran [4]Department of Mechanical Engineering,Urmia University,Urmia,Iran [5]Department of Mechanical Engineering,College of Engineering,University of Zakho,Zakho,Iraq

出　　处：《Chinese Journal of Chemical Engineering》2022年第4期424-434,共11页中国化学工程学报（英文版）

摘　　要：Heat exchangers are integral parts of important industrial units such as petrochemicals,medicine and power plants.Due to the importance of systems energy consumption,different modifications have been applied on heat exchangers in terms of size and structure.In this study,a novel heat exchanger with helically grooved annulus shell and helically coiled tube was investigated by numerical simulation.Helically grooves with the same pitch of the helical coil tube and different depth are created on the inner and outer wall of annulus shell to improve the thermal performance of heat exchanger.In the first section,thermal performance of the shell and coil heat exchanger with the helical grooves on its outer shell wall was compared with same but without helical grooves.At the second section,helically grooves created on both outer and inner wall of the annulus shell with different groove depths.The results showed that the heat exchanger with grooves on both inner and outer shell wall has better thermal performance up to 20%compared to the heat exchanger with grooves on only outer shell wall.The highest thermal performance achieves at lower flow rates and higher groove depths whereas the pressure drop did not increase significantly.

关 键 词：Numerical simulation Heat transfer Turbulent flow Shell and coil Helically grooved shell Heat exchanger 

分 类 号：TK172[动力工程及工程热物理—热能工程]