Performance characteristics of shell and helically coiled tube heat exchanger under different tube cross-sections, inclination angles and nanofluids

被引：16
作者：
Elsaid, Ashraf Mimi [1 ,4 ]
Ammar, Mohammed [2 ,3 ]
Lashin, Ashraf [3 ]
Assassa, Ghazy M. R. [3 ]
机构：
[1] Helwan Univ, Fac Technol & Educ, Refrigerat & Air Conditioning Dept Technol, Cairo 11282, Egypt
[2] Baghdad Int Airport A-C Engn, Baghdad, Iraq
[3] Benha Univ, Shoubra Fac Engn, Mech Power Engn Dept, Cairo, Egypt
[4] Helwan Univ, Fac Technol & Educ, RHVAC Technol Dept, Cairo, Egypt
来源：
CASE STUDIES IN THERMAL ENGINEERING | 2023年 / 49卷
关键词：
Elliptic tube; Square tube; Shell and helically coiled tube heat exchangers; Inclination angle; Nanofluids; Cooling performance; TRANSFER ENHANCEMENT; FLOW CHARACTERISTICS; THERMAL PERFORMANCE; TRANSFER COEFFICIENT; PRESSURE-DROP; PREDICTION; PARAMETERS; WATER; NTU;
D O I：
10.1016/j.csite.2023.103239
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The current research deals with an experimental and numerical inspection of the shell and helically coiled tube heat exchanger (SHCTHE) under various circular, elliptic, and square tube cross-sections. The research study strives to ameliorate the thermal-hydraulic performance with single nanofluids of Al2O3/H2O, MgO/H2O, and TiO2/H2O. Various factors were inspected to consider the heat exchanger performance under parameters, SHCTHE inclination angle, HCT diameter ratio, flow direction, the cross-section geometry shape, nanomaterials type, and nanomaterials concentration. The modeling engaging a numerical code tool of ANSYS-FLUENT 19 was accomplished with a 3D (RNG)/k-& epsilon; model. The mass flow rate and working fluid temperatures through the coil and shell sides were (0.05:0.2 kg/s at 80 degrees C and 0.05-0.2 kg/s at 10 degrees C, respectively. One of the most important results was that the SHCTHE with a circular tube crosssection gave the highest Nusselt number with an approximate percentage of 62.5%. The SHCTHE
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页数：29
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