Numerical analysis on performances of shell side in segmental baffles, helical baffles and novel clamping anti-vibration baffles with square twisted tubes shell and tube heat exchangers

被引：20
作者：
Naqvi, S. M. A. [1 ]
Elfeky, K. E. [1 ,2 ]
Cao, Yiping [1 ]
Wang, Qiuwang [1 ]
机构：
[1] Xi An Jiao Tong Univ, Key Lab Thermofluid Sci & Engn, MOE, Xian 710049, Shaanxi, Peoples R China
[2] Benha Univ, Benha Fac Engn, Dept Mech Engn, Banha 13511, Egypt
来源：
INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS | 2019年 / 158卷
基金：
中国国家自然科学基金;
关键词：
Numerical simulation; Shell and tube heat exchanger; Comprehensive performance; Clamping anti vibration baffles; Segmental baffles; Helical baffles; Square twisted tubes;
D O I：
10.1016/j.egypro.2019.01.553
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Segmental baffles are used in the conventional shell and tube heat exchanger (STHX). Helical baffles can be used in place of segmental baffles, which increase the heat transfer efficiency and lessen the pressure losses. To avoid flow induced vibrations and eliminate stagnant recirculation zones, a new type of clamping anti-vibration baffle is proposed. Three dimensional CFD simulations, have been performed on ANSYS FLUENT to study and compare the pressure drop and heat transfer coefficient between the newly designed clamping anti-vibration baffles with square twisted tubes, helical baffles with cylindrical tubes and conventional segmental baffle with cylindrical tubes. For the numerical comparison whole heat exchangers are modeled, the numerical model shows the thermo-hydraulic performance with good accuracy by comparing it with Kern and Esso methods for single segmental baffles. It is then used to compare the performance of the same heat exchanger with clamping anti-vibration baffles with square twisted tubes (CBSTT-STHX) and helical baffles with cylindrical tubes (HBCT-STHX). CBSTT-STHX has a higher heat transfer coefficient than segmental baffles with cylindrical tubes (SGCT-STHX) and less pressure drop than both helical baffle with cylindrical tube (HBCT-STHX) and segmental baffle with cylindrical tubes (SGCT-STHX), while its comprehensive performance is higher than SGCT-STHX and slightly less than HBCT-STHX. (C) 2019 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：5770 / 5775
页数：6
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