Optimizing the thermal performance of a double-pipe heat exchanger using twisted tapes with variable cuts and Fe3O4 nanofluid

Year 2024, Volume: 10 Issue: 5, 1184 - 1197, 10.09.2024

K. P. V. Krishna Varma N. S. Naveen P. S. Kishore Satish Pujari Krishna Jogi V. Dhana Raju

Abstract

This research work aims to optimize double pipe heat exchanger performance using Taguchi, ANOVA, and ANN. Experimental trials involved varying ferric oxide nanoparticles, cut radius, and volume-based flow rate. Twisted tapes with ratios of 3, 5, and 7 were placed within the tube. Assessed heat transfer characteristics included h, Nu, ff, and thermal performance factor. Taguchi, ANOVA, and ANN optimization techniques were applied to the experimental data. A Taguchi optimization using an L9 orthogonal array focused on input attributes (Vol % of nanoparticles, flow rate, radius of cut), with output attributes being heat transfer co-efficient (h), Nusselt number (Nu), friction factor(ff) and thermal performance factor. Results revealed a notable flow rate effect on enhancing h, Nu, and ff, while the addition of nanoparticles significantly influenced thermal performance. Taguchi and ANOVA were conducted using MINI Tab and ANN was implemented through MATLAB. Test data demonstrated that nanoparticle dispersants in nanofluid significantly improved heat transfer properties, consistent with the noteworthy improvement indicated by optimization techniques. The convective heat transfer coefficient parameter showed improvement with a coolant flow rate of 50.29% and a volume of nanoparticles at 27.32%. The enhancement of Nusselt number (Nu) was influenced by a coolant flow rate of 50.34% and a volume percent of nanoparticles at 34.25%. The thermal performance factor was significantly influenced by the volume percent of nanoparticles (79.75%) and the radius of cut (3.83%).The experimental data aligned well with findings from Taguchi and ANN.

Keywords

ANN, Cut Twisted Tapes, Friction Factor, Nanofluid, Nusselt Number, Reynolds Number, Taguchi

References

• [1] Bergles AE. The implications and challenges of enhanced heat transfer for the chemical process industries. Chem Engineer Res Des 2011;79:437–444. [CrossRef]
• [2] Buongiorno J. Convective transport in nanofluids. Trans ASME 2006;128:240–250.
• [3] Godson LB, Lal DM, Wongwises S. Enhancement of heat transfer using nanofluids-An overview. Renew Sustain Energy Rev 2010;214:629–641. [CrossRef]
• [4] Bozorg Bigedli M, Fasano M, Cardellini A, Chivazzo E, Asinari P. A review on the heat and mass transfer phenomena in nanofluid coolants with a special focus on automotive applications. Renew Sustain Energy Rev 2016;60:1615–1633. [CrossRef]
• [5] Kakac S, Pramuanjaroenkij A. Review of convective heat transfer enhancement with nanofluids. Int J Heat Mass Transf 2009;52:3187–3196. [CrossRef]
• [6] Sarafraz MM, Hormozi F, Peyghambarzadeh SM. Thermal performance and efficiency of a thermosyphon heat pipe working with a biologically ecofriendly nanofluid. Int Comm Heat Mass Transf 2014;57:297–303. [CrossRef]
• [7] Sarafraz MM, Tian Z, Tlili I, Kazi S, Goodarzi M. Thermal evaluation of a heat pipe working with n-pentane-acetone and n-pentane-methanol binary mixtures. J Therm Anal Calorim 2020;139:2435–2445. [CrossRef]
• [8] Shima PD, Philip J, Raj B. Synthesis of aqueous and nonaqueous iron oxide nanofluids and study of temperature dependence on thermal conductivity and viscosity. J Phys Chem C 2010;114:18825–18833. [CrossRef]
• [9] Chopkar M, Das PK, Manna I. Synthesis and characterization of nanofluid for advanced heat transfer applications. Scr Mater 2006;55:549–552. [CrossRef]
• [10] Parekh K, Lee HS. Magnetic field induced enhancement in thermal conductivity of magnetite nanofluid. J Appl Phys 2010;107:09A310. [CrossRef]
• [11] Syam Sundar L, Abebaw HM, Singh KM, Pereira AMB, Sousa AMC. Experimental heat transfer and friction factor of Fe3O4 magnetic nanofluids flow in a tube under laminar flow at high Prandtl numbers. Int J Heat Technol 2020;36:301–313. [CrossRef]
• [12] Han D, He WF, Asif FZ. Experimental study of heat transfer enhancement using nanofluid in double tube heat exchanger. Energy Procedia 2017;142:2547–2553. [CrossRef]
• [13] Guan BH, Hanafi M, Khalid M, Matraji HH, Chuan LK, Soleimani H. An evaluation of iron oxide nanofluids in enhanced oil recovery application. AIP Conf Proc 2014;1621:600–604. [CrossRef]
• [14] Elsaidy A, Vallejo JP, Salgueirino V, Lugo L. Tuning the thermal properties of aqueous nanofluids by taking advantage of size-customized clusters of iron oxide nanoparticles. J Mol Liq 2021;344:117727. [CrossRef]
• [15] Sarma PK, Kishore PS, Dharma Rao V, Subrahmanyam T. A combined approach to predict coefficients and convective heat transfer characteristics in a tube with twisted tape inserts for a wide range of Re and Pr. Int J Therm Sci 2005;44:393–398. [CrossRef]
• [16] Syam Sundar L, Sharma KV. Turbulent heat transfer and friction factor of Al2O3 nanofluid in a circular tube with twisted tape inserts. Int J Heat Mass Transf 2010;53:1409–1416. [CrossRef]
• [17] Sarma PK, Kedarnath C, Sharma KV, Syam Sundar L, Kishore PS, Srinivas V. Experimental study to predict momentum and thermal diffusivities from convective heat transfer data of nano fluid with Al2O3 dispersion. Int J Heat Technol 2010;28:123–131.
• [18] Sadeghi O, Mohammed HA, Bakhtiari-Nejad M, Wahid MA. Heat transfer and nanofluid flow characteristics through a circular tube fitted with helical tape inserts. Int Commun Heat Mass Transf 2016;71:234–244. [CrossRef]
• [19] Sarma PK, Kedarnath C, Dharma Rao V, Kishore PS, Subrahmanyam T, Bergles AE. Evaluation of momentum and thermal eddy diffusivities for turbulent flow in tubes. Int J Heat Mass Transf 2010;53:1237–1242. [CrossRef]
• [20] Varma KV, Pisipaty SK, Mendu S, Ghosh R. Optimization of performance parameters of a double pipe heat exchanger with cut twisted tapes using CFD and RSM. Chem Eng Process Process Intensif 2021;163:108362. [CrossRef]
• [21] Kelidari M, Maoghadam AJ. Effects of Fe3O4/water nanofluid on the efficiency of a curved pipe. J Therm Sci Engineer Appl 2019;4:041016. [CrossRef]
• [22] Syam Sundar L, Kumar NT, Naik MT, Sharma KV. Effect of full-length twisted tape inserts on heat transfer and friction factor enhancement with Fe3O4 magnetic nanofluid inside a plain tube: An experimental study. Int J Heat Mass Transf 2012;55:2761–2768. [CrossRef]
• [23] Aghayari R, Maddah H, Ashori F, Hakiminejad A, Aghili M. Effect of nanoparticles on heat transfer in mini double-pipe heat exchangers in turbulent flow. Heat Mass Transf 2015;51:301–306. [CrossRef]
• [24] Aghayari R, Maddah H, Baghbani Arani J, Mohammadiun H, Nikpanje E. An experimental investigation of heat transfer of Fe2O3/water nanofluid in a double pipe heat exchanger. Int J Nano Dimens 2015;6:517–524.
• [25] Wijayanta AT, Pranowo, Mirmanto, Kristiwan B, Aziz M. Internal flow in an enhanced tube having square-cut twisted tape insert. Energies 2019;12:306. [CrossRef]
• [26] Al-Obaidi AR. Investigation of thermal flow structure and performance heat transfer in a three-dimensional circular pipe using twisted tape based on Taguchi method analysis. Heat Transf 2021;51:1649–1659. [CrossRef]
• [27] Kumar V, Sahoo RR. Parametric and design optimization investigation of a wavy fin and tube air heat exchanger using the T-G technique. Heat Transf 2022;51:4641–4666. [CrossRef]
• [28] Kavitha R, Abd Algani YM, Kulkarni K, Gupta MK. Heat transfer enhancement in a double pipe heat exchanger with copper oxide nanofluid: An experimental study. Mater Today Proc 2022;56:3446–3449. [CrossRef]
• [29] Praveenkumara BM, Gowda BS, Bharatwaj KN. An experimental investigation of study the combined effect of threaded pipe and twisted tap inserts on heat transfer rate of double pipe heat exchangers. Mater Today Proc 2023;82:108–117. [CrossRef]
• [30] Colaco AB, Mariani VC, Salem MR, Coelho LD. Maximizing the thermal performance index applying evolutionary multi-objective optimization approaches for a double pipe heat exchanger. Appl Therm Engineer 2022;211:118504. [CrossRef]
• [31] Gnielinski V. New equations for heat and mass transfer in turbulent pipe and channel flow. Int Chem Engineer 1976;16:359–368.
• [32] Notter RH, Rouse MW. A solution to the Graetz problem – III, Fully developed region heat transfer rates. Chem Engineer Sci 1972;27:2073–2093. [CrossRef]
• [33] Blasius B. Boundary layers in fluids with small friction. Z Math Phys 1908;56:1–37.
• [34] Petukhov BS. Heat transfer and friction in turbulent pipe flow with variable physical properties. Adv Heat Transf 1970;504–564. [CrossRef]
• [35] Moffat RJ. Describing the uncertainties in experimental results. Exp Therm Fluid Sci 1988;1:3–17. [CrossRef]