An experimental investigation of the air-side performance of crimped spiral fin-and-tube heat exchangers with a small tube diameter

被引：22
作者：
Keawkamrop, Hawatchai [1 ]
Asirvatham, Lazarus Godson [2 ]
Dalkilic, Ahmet Selim [3 ]
Ahn, Ho Seon [4 ]
Mahian, Omid [5 ,6 ]
Wongwi, Somchai [1 ,7 ]
机构：
[1] King Mongkuts Univ Technol Thonburi KMUTT, Fac Engn, Dept Mech Engn, Fluid Mech Thermal Engn & Multiphase Flow Res Lab, Bangkok 10140, Thailand
[2] Karunya Inst Technol & Sci, Dept Mech Engn, Coimbatore, Tamil Nadu, India
[3] Yildiz Tech Univ, Dept Mech Engn, Istanbul, Turkey
[4] Incheon Natl Univ, Dept Mech Engn, Incheon, South Korea
[5] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian, Peoples R China
[6] Ferdowsi Univ Mashhad, Ctr Nanotechnol Renewable Energies, Dept Mech Engn, Mashhad, Razavi Khorasan, Iran
[7] Natl Sci & Technol Dev Agcy NSTDA, Pathum Thani 12120, Thailand
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2021年 / 178卷
关键词：
Crimped fin; Spiral fin; extended surface; Heat transfer; Heat exchanger; FRICTION CHARACTERISTICS; MULTIPASS PARALLEL; DRY-SURFACE; WAVY FIN; NUMBER; FLOW; PITCHES; ROWS;
D O I：
10.1016/j.ijheatmasstransfer.2021.121571
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The performance of crimped spiral fin-and-tube heat exchangers (CSFTHXs) with a small tube diameter at a Reynolds number of 150 0-640 0 based on the tube's outer diameter is experimentally investigated. An important factor in this study is the small-diameter tubing, with an outer diameter of 9.53 mm. Cop-per tubes and aluminum fins are assembled as CSFTHXs. Test sections consist of a fin thickness of 0.5 mm, two tube rows, and various fin pitches and outer diameters of 3.18-6.35 mm and 23.0-28.5 mm, respectively. Hot water and fresh air are used as the working fluids. The effects of fin pitch and fin outer diameter on the heat transfer characteristics and friction factor (f) are also studied. The results show that the fin's pitch and outer diameter have little effect on the Nusselt number (Nu) and Colburn factor (j). On the other hand, they have a significant effect on the f . Furthermore, correlations between the Nu, j, and f for a CSFTHX with a small tube diameter are developed and proposed for designing heat exchangers in the thermal industry. (c) 2021 Elsevier Ltd. All rights reserved.
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页数：11
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