Numerical simulation on a novel shell-and-tube heat exchanger with screw cinquefoil orifice baffles. (August 2017)

• Record Type: Journal Article
• Authors: Zhang, Xuankai; Han, Dong; He, Weifeng; Yue, Chen; Pu, Wenhao
• Is Part Of: Advances in mechanical engineering. Volume 9:Number 8(2017:Aug.)
• Publication Date: 2017-08
• Subjects: Computational fluid dynamics -- heat exchanger -- heat and mass transfer -- numerical analysis -- cinquefoil orifice baffle; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/1687814017717665
• Languages: English
• ISSNs: 1687-8132

Abstract

A novel shell-and-tube heat exchanger with screw cinquefoil orifice baffles is designed to grasp the weakness of the traditional shell-and-tube heat exchanger with cinquefoil orifice baffles. It specifically enhances the heat transfer coefficient in the area between adjacent baffles and enhances the shell-side fluid flushing ability on bundles. In the proposed shell-and-tube heat exchanger with screw cinquefoil orifice baffles, screw-type cinquefoil orifice baffles are installed in the shell side. Shell-and-tube heat exchanger with screw cinquefoil orifice baffle is compared with shell-and-tube heat exchanger with cinquefoil orifice baffles and the traditional shell-and-tube heat exchanger with segmental baffles by means of numerical simulations. The numerical result shows that the heat transfer coefficient and shell-side fluid flushing ability in the shell-and-tube heat exchanger with screw cinquefoil orifice baffle is higher than that in the shell-and-tube heat exchanger with cinquefoil orifice baffles and shell-and-tube heat exchanger with segmental baffles, for the shell-side fluid that is urged to flow in approximately continuous helical flow. Under the same shell-side mass flow rate, heat transfer coefficient of shell-and-tube heat exchanger with screw cinquefoil orifice baffle is about 9.2% higher than that of shell-and-tube heat exchanger with cinquefoil orifice baffles and shell-and-tube heat exchanger with segmental baffles by about 5.4% on average. The article presents a novel design thought when researchers design heat exchangers.