Experimental and numerical study on the heat transfer and flow characteristics in shell side of helically coiled tube heat exchanger based on multi-objective optimization

被引：46
作者：
Wang, Guanghui [1 ,2 ]
Wang, Dingbiao [1 ,2 ]
Deng, Jing [1 ,2 ]
Lyu, Yiming [1 ,2 ]
Pei, Yuanshuai [1 ,2 ]
Xiang, Sa [1 ,2 ]
机构：
[1] Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Henan, Peoples R China
[2] Minist Educ, Engn Res Ctr Energy Saving Technol & Equipment Th, Zhengzhou 450001, Henan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 137卷
基金：
中国国家自然科学基金;
关键词：
Helically coiled tube heat exchanger; Double-layer multi-objective optimization; Sensitivity analysis; The optimal structure; Fitting correlations; PRESSURE-DROP; TRANSFER COEFFICIENTS; SUPERCRITICAL CO2; FORCED-CONVECTION; TEMPERATURE; PREDICTION; LAMINAR;
D O I：
10.1016/j.ijheatmasstransfer.2019.03.137
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Based on two-layer multi-objective optimization which is aimed at maximum performance evaluation criterion (PEC) and maximum field synergy number (Fc), the heat transfer and flow characteristics in shell side of helically coiled tube heat exchanger are investigated experimentally and numerically. The sensitivity analysis, univariate analysis and response surface analysis are conducted, in which, the selected working fluids are water and saturated vapor, and the transverse spacing (5), coiled radius (R), heat exchange tube diameter (d) are set as the design variables. The results suggested that d significantly affects f and PEC, while, R and S comparatively small, and for Nu, R is larger, whereas the difference between the three is small. The optimal structure for a Reynolds number from 5000 to 40,000 is that: d = 8 mm, R = 50 mm, S = 20 mm or 21 mm. Compared with the initial structure under the same working condition, the Fc based on the field synergy principle (FSP) indicates the comprehensive performance is improved by 36.84%, and PEC shows 33.42% improvement in the comprehensive performance. The fitting correlations of Nu and f in shell side of helically coiled tube heat exchanger fitted by the numerical simulation data are well consistent with the experimental data. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：349 / 364
页数：16
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