This study investigates the influence of primary swirl induced by a twisted tape (TT) and secondary swirl generated by rotating vanes on the performance of a double-pipe heat exchanger. A novel aspect of this work is the detailed examination of varying vane angles (15°, 30°, 45°, and 60°), a parameter rarely explored in prior studies, to optimize thermal performance. Experiments were conducted using water as the working fluid across a Reynolds number range of 5500 to 10,000. Results reveal significant heat transfer enhancements, with improvements of up to 102.54% for a vane angle of 60° compared to TT alone. However, the performance evaluation criterion of 1.49 identifies 30° as the optimal vane angle, balancing enhanced heat transfer and acceptable friction losses. Regression analysis confirms the strong correlation between vane angle, Nusselt number (R² = 0.9865), and friction factor (R² = 0.9993). Experimental validation demonstrates excellent agreement between correlation predictions and measured values within ±10%. This study offers valuable insights into optimizing passive heat transfer enhancement techniques.
LiuSSakrM. A comprehensive review on passive heat transfer enhancements in pipe exchangers. Renew Sustain Energy Rev2013; 19: 64–81.
2.
OmidiMFarhadiMJafariM. A comprehensive review on double pipe heat exchangers. Appl Therm Eng2017; 110: 1075–1090.
3.
ZhangCWangDRenK, et al.A comparative review of self-rotating and stationary twisted tape inserts in heat exchanger. Renew Sustain Energy Rev2016; 53: 433–449.
4.
ManCYaoJWangC. The experimental study on the heat transfer and friction factor characteristics in tube with a new kind of twisted tape insert. Int Commun Heat Mass Transfer2016; 75: 124–129.
5.
Eiamsa-ArdSThianpongCPromvongeP. Experimental investigation of heat transfer and flow friction in a circular tube fitted with regularly spaced twisted tape elements. Int Commun Heat Mass Transfer2006; 33: 1225–1233.
6.
Eiamsa-ArdSPromvongeP. Heat transfer characteristics in a tube fitted with helical screw-tape with/without core-rod inserts. Int Commun Heat Mass Transfer2007; 34: 176–185.
7.
Eiamsa-ArdSWongchareeKEiamsa-ArdP, et al.Heat transfer enhancement in a tube using delta-winglet twisted tape inserts. Appl Therm Eng2010; 30: 310–318.
8.
SivakumarKRajanK. Experimental analysis of heat transfer enhancement in a circular tube with different twist ratio of twisted tape inserts. Int J Heat Technol2015; 33: 158–162.
9.
BhuiyaMMKChowdhuryMSUShahabuddinM, et al.Thermal characteristics in a heat exchanger tube fitted with triple twisted tape inserts. Int Commun Heat Mass Transfer2013; 48: 124–132.
10.
GargMONautiyalHKhuranaS, et al.Heat transfer augmentation using twisted tape inserts: a review. Renew Sustain Energy Rev2016; 63: 193–225.
11.
NakhchiMEHatamiMRahmatiM. Experimental evaluation of performance intensification of double-pipe heat exchangers with rotary elliptical inserts. Chem Eng Process: Process Intensif2021; 169: 108615.
PromvongePSkullongS. Thermohydraulic performance and entropy generation in heat exchanger tube with louvered winglet tapes. Int J Therm Sci2022; 181: 107733.
14.
PromvongePEiamsa-ardSSkullongS, et al.Thermal performance and exergy analysis in a round tube with louvered trapezoidal winglets. Int J Heat Mass Transfer2023; 212: 124261.
15.
SinghSKKumarA. Experimental study of heat transfer and friction factor in a double pipe heat exchanger using twisted tape with dimple inserts. Energy Sources Part A2021; 27: 1–30.
16.
MatheswaranMMArjunanTVSahuMK. Influence of twisted tape fins on heat transfer and friction factor characteristics for impinging jet solar air heater. Proc Inst Mech Eng E: J Process Mech Eng2021; 235: 824–831.
17.
SinghSKKackerRChaurasiyaPK, et al.Correlations on heat transfer rate and friction factor of a rectangular toothed v-cut twisted tape exhibiting the combined effects of primary and secondary vortex flows. Int Commun Heat Mass Transfer2022; 139: 106503.
18.
SuriARSKumarAMaithaniR. Heat transfer enhancement of heat exchanger tube with multiple square perforated twisted tape inserts: experimental investigation and correlation development. Chem Eng Process: Process Intensif2017; 116: 76–96.
19.
ChuWXTsaiCALeeBH, et al.Experimental investigation on heat transfer enhancement with twisted tape having various v-cut configurations. Appl Therm Eng2020; 172: 115148.
20.
EbaikaJAShujaSZYilbasBS, et al.Microchannel flow and heat transfer enhancement via ribs arrangements. Proc Inst Mech Eng E: J Process Mech Eng2022; 236: 668–684.
21.
KumarBPatilAKJainS, et al.Effects of double v cuts in perforated twisted tape insert: an experimental study. Heat Transf Eng2020; 41: 1473–1484.
22.
MurugesanKMayilsamySSureshS, et al.Heat transfer and pressure drop characteristics in a circular tube fitted with and without v-cut twisted tape insert. ICHMT2011; 38: 329–334.
23.
HasanpourAFarhadiMSedighiK. Experimental heat transfer and pressure drop study on typical, perforated, V-cut and U-cut twisted tapes in a helically corrugated heat exchanger. ICHMT2016; 71: 126–136.
24.
SinghSKKackerRGautamSS, et al.Correlations on heat-transfer rate and friction factor using radial and axial v-cut geometry on a twisted tape in a double-pipe heat exchanger. Proc Inst Mech Eng E: J Process Mech Eng2024: 09544089241252047.
25.
ChuwattanakulVWongchareeKKetainP, et al.Aerothermal performance evaluation of a tube mounted with broken V-ribbed twisted tape: effect of forward/backward arrangement. Case Stud Therm Eng2021; 41: 102642.
26.
SinghSKKackerRGautamSS, et al.Development of ANN prediction model for estimation of heat transfer utilizing rectangular-toothed v-cut twisted tape. Proc Inst Mech Eng E: J Process Mech Eng2024: 09544089241272853.
27.
PromvongePSkullongS. Heat transfer in a tube with combined V-winglet and twin counter-twisted tape. Case Stud Therm Eng2021; 26: 101033.
28.
PromvongePEiamsa-ardSSkullongS, et al.Thermal performance and exergy analysis in a round tube with louvered trapezoidal winglets. Int J Heat Mass Transfer2023; 212: 124261.
29.
WangJZengLHeY, et al.Effect of structure parameters on thermal performance of novel punched V-shape vortex generators for heat exchangers: an experimental approach. Int Commun Heat Mass Transfer2024; 155: 107472.
30.
WangJZengLYuS, et al.Experimental and numerical investigations of tube inserted with novel perforated rectangular V-shape vortex generators. Appl Therm Eng2024; 249: 123451.
31.
ManCLvXHuJ, et al.Experimental study on effect of heat transfer enhancement for single-phase forced convective flow with twisted tape inserts. Int Commun Heat Mass Transfer2017; 106: 877–883.
32.
ManCYaoJWangC. The experimental study on the heat transfer and friction factor characteristics in tube with a new kind of twisted tape insert. Int Commun Heat Mass Transfer2016; 75: 124–129.
33.
GnielinskiV. New equations for heat and mass transfer in turbulent pipe and channel flow. Int Chem Eng1976; 16: 359–367.
34.
FilonenkoGK. Hydraulic resistance of pipes. Teploenergetika1954; 1: 40–44.
35.
NikuradseJ. Laws of flow in rough pipes. NACA Tech Memo 1292, Nov 1950.
36.
VaisiAMoosaviRLashkariM, et al.Experimental investigation of perforated twisted tapes turbulator on thermal performance in double pipe heat exchangers. Chem Eng Process: Process Intensif2020; 154: 108028.
37.
NakhchiMEEsfahaniJA. Numerical investigation of rectangular-cut twisted tape insert on performance improvement of heat exchangers. Int J Therm Sci2019; 138: 75–83.
38.
DirkerJMeyerJPSteynRM. Influence of ring type flow turbulators on the local heat transfer coefficients in an annular passage—an experimental and numerical investigation. Int J Therm Sci2021; 168: 107052.
39.
PadmanabhanSReddyOYYadavKVAK, et al.Heat transfer analysis of double tube heat exchanger with helical inserts. Mater Today Proc2021; 46: 3588–3595.
40.
MurugesanPMayilsamyKSureshS. Turbulent heat transfer and pressure drop in tube fitted with square-cut twisted tape. Chin J Chem Eng2010; 18: 609–617.
41.
DandoutiyaBKKumarA. CFD analysis for the performance improvement of a double pipe heat exchanger with twisted tape having triangular cut. Energy Sources Part A2021: 1–19.
42.
WangGWangDPengX, et al.Experimental and numerical study on heat transfer and flow characteristics in the shell side of helically coiled trilobal tube heat exchanger. Appl Therm Eng2019; 149: 772–787.
43.
SinghSKKumarA. Experimental study of heat transfer enhancement from dimpled twisted tape in double pipe heat exchanger. Int J Mech Prod Eng Res Dev2020; 10: 469–482.
Supplementary Material
Please find the following supplemental material available below.
For Open Access articles published under a Creative Commons License, all supplemental material carries the same license as the article it is associated with.
For non-Open Access articles published, all supplemental material carries a non-exclusive license, and permission requests for re-use of supplemental material or any part of supplemental material shall be sent directly to the copyright owner as specified in the copyright notice associated with the article.
