Study of heat transfer and pressure drop for novel configurations of helical tube heat exchanger: a numerical and experimental approach

作     者：Marzouk, S. A. Abou Al-Sood, M. M. El-Said, Emad M. S. El-Fakharany, Magda K. Younes, M. M. 

作者机构：Kafrelsheikh Univ Fac Engn Mech Engn Dept Kafrelsheikh Egypt Damietta Univ Fac Engn Mech Power Engn Dept Dumyat Egypt 

出 版 物：《JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY》 (热分析和量热学杂志)

年 卷 期：2023年第148卷第13期

页      面：6267-6282页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：Kafrelsheikh University 

主　　题：Helical tube heat exchanger Pressure drop Coefficient of performance Tube configurations Heat transfer enhancement 

摘      要：In this study, several unique tube configurations are designed and modeled to examine the thermal and hydraulic performance of a helical tube heat exchanger (HTHE) experimentally and numerically. For cold and hot side tube designs, the numerical investigation is completed using three-dimensional modeling, and the findings are confirmed using experimental data with Reynolds numbers ranging from 16,000 to 25,000. Six configurations named HTHE1, HTHE2, HTHE3, HTHE4, HTHE5, and HTHE6 are tested. The findings showed that as compared to the uniform tube distribution, the new arrangements have a greater overall heat transfer coefficient. The overall heat transfer coefficient has the highest enhancement ratio (125-185%) in the HTHE6 setup with two pathways. Additionally, it is discovered that the pressure drop rises as the Reynolds number increases. The HTHE1 configuration has the highest pressure drop values, whereas configurations with only one pass result in a greater pressure loss when compared to setups with two paths. The values of the coefficient of performance for the HTHE6 are larger than those of other forms, and the coefficient of performance decreases as the Reynolds number increases. The exergy efficiency grows with the rise of Reynolds number where the HTHE6 has the maximum value of exergy efficiency compared to other shapes. The performance of heat transfer is dramatically improved by the novel tube arrangements, although variations in pressure drop and pumping power are only a little affected.