Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems

Ardhani Satya Bhanu Prasanna; Koona Ramji; Manepalli Sailaja; D. Asirinaidu

doi:10.14744/thermal.0000923

Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems

Abstract

The study investigates the heat transfer properties of ethylene glycol-alumina nanofluids in a double-tube spiral coil heat exchanger operating under laminar flow conditions. The present study is related to solar thermal systems and discusses the effects of surface modification of nanomaterials before dispersion in ethylene glycol. Further, the study compares the experimental values with a computational fluid dynamics model. The fluid used consists of ethylene glycol with dispersed nano-alumina (Al2O3) with a diameter of 50 nm in concentrations of 1%, 0.5%, 0.25% and 0.125%. The aluminum oxide nanoparticles were surface modified with the surfactant hexadecyl cetyl trimethyl ammonium bromide to improve the dispersion stability. To determine the thermal conductivity and dynamic viscosity at different concentrations, C-Therm thermal analyzer and a Brookfield viscometer were employed. The heat transfer intensification studies were conducted in a double-tube spiral heat exchanger. The dispersion of nanoparticles leads to an increase in thermal conductivity of up to 20 %. The results show that adding alumina nanoparticles to ethylene glycol resulted in an increase in the heat transfer coefficient by up to 32% compared to base ethylene glycol. The heat transfer coefficients of the test fluids increased by 22%, 27%, 30% and 32% when nanofluids with alumina concentrations of 0.125%, 0.25%, 0.5% and 1%, respectively, were used. The validity of the results was confirmed by comparing the experimental data with computational fluid dynamics models. The validation of the mesh confirmed the accuracy of the numerical flow model. The deviation between the experimental data and the values predicted by the flow model is negligible.

Keywords

References

[1] Belhadj A, Bouchenafa R, Saim R. Numerical investigation of forced convection of nanofluid in microchannels heat sinks. J Therm Eng 2018;4:2263–2273. [CrossRef]
[2] Belhadj A, Bouchenafa R, Saim R. A numerical study of forced convective flow in microchannels heat sinks with periodic expansion-constriction cross section. J Ther Eng 2018;4:1912–1925. [CrossRef]
[3] Agarwal R, Verma K, Agrawal NK, Singh R. Sensitivity of thermal conductivity for Al2O3 nanofluids. Exp Therm Fluid Sci 2017;80:19–26. [CrossRef]
[4] Assael MJ, Chen C-F, Metaxa I, Wakeham WA. Thermal conductivity of suspensions of carbon nanotubes in water. Int J Thermophys 2004;25:971–985. [CrossRef]
[5] Ardekani AM, Kalantar V, Heyhat MM. Experimental study on the flow and heat transfer characteristics of Ag/water and SiO2/water nanofluids flows in helically coiled tubes. J Therm Anal Calorim 2019;137:779–790. [CrossRef]
[6] Delavari V, Hashemabadi SH. CFD simulation of heat transfer enhancement of Al2O3/water and Al2O3/ethylene glycol nanofluids in a car radiator. Appl Therm Eng 2014;73:380–390. [CrossRef]
[7] Prabhanjan DG, Rennie TJ, Raghavan GSV. Natural convection heat transfer from helical coiled tubes. Int J Therm Sci 2004;43:359–365. [CrossRef]
[8] Dosodia A, Vadapalli S, Jain AK, Mukkamala SB, Sanduru BT. Experimental studies and analytical analysis of thermophysical properties of ethylene glycol–water-based nanofluids dispersed with multi-walled carbon nanotubes. Int J Thermophys 2022;43:175. [CrossRef]

[9] Huminic G, Huminic A. Heat transfer characteristics in double tube helical heat exchangers using nanofluids. Int J Heat Mass Transf 2011;54:4280–4287. [CrossRef]
[10] Itō H. Friction factors for turbulent flow in curved pipes. J Basic Eng 1959;81:123–132. [CrossRef]
[11] Jayakumar JS, Mahajani SM, Mandal JC, Vijayan PK, Bhoi R. Experimental and CFD estimation of heat transfer in helically coiled heat exchangers. Chem Eng Res Des 2008;86:221–232. [CrossRef]
[12] Palanisamy K, Mukesh Kumar PC. Experimental investigation on convective heat transfer and pressure drop of cone helically coiled tube heat exchanger using carbon nanotubes/water nanofluids. Heliyon 2019;5:e01705. [CrossRef]
[13] Khairul MA, Saidur R, Rahman MM, Alim MA, Hossain A, Abdin Z. Heat transfer and thermodynamic analyses of a helically coiled heat exchanger using different types of nanofluids. Int J Heat Mass Transf 2013;67:398–403. [CrossRef]
[14] Dehghandokht M, Khan MG, Fartaj A, Sanaye S. Flow and heat transfer characteristics of water and ethylene glycol–water in a multi-port serpentine meso-channel heat exchanger. Int J Therm Sci 2011;50:1615–1627. [CrossRef]
[15] Hemmat Esfe M, Rostamian H. Non-Newtonian power-law behavior of TiO2/SAE 50 nano-lubricant: An experimental report and new correlation. J Mol Liq 2017;232:219–225. [CrossRef]
[16] Naphon P. Thermal performance and pressure drop of the helical-coil heat exchangers with and without helically crimped fins. Int Commun Heat Mass Transf 2007;34:321–330. [CrossRef]
[17] Rashidi O, Sajadi SM, Soufivand M, D′Orazio A, Karimipour A. Experimental study to improve the hydrodynamic and thermal efficiencies of a cross-flow car radiator using a new prepared hybrid nanofluid composed of graphene oxide and silicon oxide nanoparticles dispersed in water–ethylene glycol fluid. Int J Thermophys 2024;45:23. [CrossRef]
[18] Kia S, Khanmohammadi S, Jahangiri A. Experimental and numerical investigation on heat transfer and pressure drop of SiO2 and Al2O3 oil-based nanofluid characteristics through the different helical tubes under constant heat fluxes. Int J Therm Sci 2023;185:108082. [CrossRef]
[19] Heris SZ, Etemad SG, Esfahany MN. Experimental investigation of oxide nanofluids laminar flow convective heat transfer. Int Commun Heat Mass Transf 2006;33:529–535. [CrossRef]
[20] Rennie TJ, Raghavan VGS. Experimental studies of a double-pipe helical heat exchanger. Exp Therm Fluid Sci 2005;29:919–924. [CrossRef]
[21] Rennie TJ, Raghavan VGS. Numerical studies of a double-pipe helical heat exchanger. Appl Therm Eng 2006;26:1266–1273. [CrossRef]
[22] Kumar V, Faizee B, Mridha M, Nigam KDP. Numerical studies of a tube-in-tube helically coiled heat exchanger. Chem Eng Process 2008;47:2287–2295. [CrossRef]
[23] Kumar V, Saini S, Sharma M, Nigam KDP. Pressure drop and heat transfer study in tube-in-tube helical heat exchanger. Chem Eng Sci 2006;61:4403–4416. [CrossRef]
[24] Vadapalli S, Sagari JK, Alapati H, Kalamalla VR, Su R. Heat-transfer enhancement of mono ethylene glycol-water-based solar thermic fluids dispersed with multiwalled carbon nanotubes in a coiled tube heat exchanger. J Enh Heat Transf 2023;30:1–22. [CrossRef]
[25] Vaisman L, Wagner HD, Marom G. The role of surfactants in dispersion of carbon nanotubes. Adv Colloid Interface Sci 2006;128–130:37–46. [CrossRef]
[26] Vajjha RS, Das DK, Chukwu GA. An experimental determination of the viscosity of propylene glycol/water based nanofluids and development of new correlations. J Fluids Eng 2015;137:4029928. [CrossRef]
[27] Xin RC, Ebadian MA. Natural convection heat transfer from helicoidal pipes. J Thermophys Heat Transf 1996;10:297–302. [CrossRef]
[28] Wen D, Ding Y. Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions. Int J Heat Mass Transf 2004;47:5181–5188. [CrossRef]
[29] Zeinali Heris S, Nasr Esfahany M, Etemad SG. Experimental investigation of convective heat transfer of Al2O3/water nanofluid in circular tube. Int J Heat Fluid Flow 2007;28:203–210. [CrossRef]

Details

Primary Language

English

Subjects

Fluid Mechanics and Thermal Engineering (Other)

Journal Section

Research Article

Authors

Ardhani Satya Bhanu Prasanna ^* This is me
0009-0000-1618-8800
India

Koona Ramji This is me
0000-0002-5079-9952
India

Manepalli Sailaja This is me
0000-0002-9329-337X
India

D. Asirinaidu This is me
0000-0003-4623-9925
India

Publication Date

March 24, 2025

Submission Date

May 6, 2024

Acceptance Date

September 18, 2024

Published in Issue

Year 2025 Volume: 11 Number: 2

DOI

https://doi.org/10.14744/thermal.0000923

IZ

https://izlik.org/JA68WK62TF

Cite

RIS / Bibtex

APA

Prasanna, A. S. B., Ramji, K., Sailaja, M., & Asirinaidu, D. (2025). Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems. Journal of Thermal Engineering, 11(2), 407-421. https://doi.org/10.14744/thermal.0000923

AMA

1.Prasanna ASB, Ramji K, Sailaja M, Asirinaidu D. Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems. Journal of Thermal Engineering. 2025;11(2):407-421. doi:10.14744/thermal.0000923

Chicago

Prasanna, Ardhani Satya Bhanu, Koona Ramji, Manepalli Sailaja, and D. Asirinaidu. 2025. “Heat Transfer Intensification of Ethylene Glycol Dispersed With Nano Alumina in a Spiral Tube Heat Exchanger for Application in Solar Thermal Systems”. Journal of Thermal Engineering 11 (2): 407-21. https://doi.org/10.14744/thermal.0000923.

EndNote

Prasanna ASB, Ramji K, Sailaja M, Asirinaidu D (March 1, 2025) Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems. Journal of Thermal Engineering 11 2 407–421.

IEEE

[1]A. S. B. Prasanna, K. Ramji, M. Sailaja, and D. Asirinaidu, “Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems”, Journal of Thermal Engineering, vol. 11, no. 2, pp. 407–421, Mar. 2025, doi: 10.14744/thermal.0000923.

ISNAD

Prasanna, Ardhani Satya Bhanu - Ramji, Koona - Sailaja, Manepalli - Asirinaidu, D. “Heat Transfer Intensification of Ethylene Glycol Dispersed With Nano Alumina in a Spiral Tube Heat Exchanger for Application in Solar Thermal Systems”. Journal of Thermal Engineering 11/2 (March 1, 2025): 407-421. https://doi.org/10.14744/thermal.0000923.

JAMA

1.Prasanna ASB, Ramji K, Sailaja M, Asirinaidu D. Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems. Journal of Thermal Engineering. 2025;11:407–421.

MLA

Prasanna, Ardhani Satya Bhanu, et al. “Heat Transfer Intensification of Ethylene Glycol Dispersed With Nano Alumina in a Spiral Tube Heat Exchanger for Application in Solar Thermal Systems”. Journal of Thermal Engineering, vol. 11, no. 2, Mar. 2025, pp. 407-21, doi:10.14744/thermal.0000923.

Vancouver

1.Ardhani Satya Bhanu Prasanna, Koona Ramji, Manepalli Sailaja, D. Asirinaidu. Heat transfer intensification of ethylene glycol dispersed with nano alumina in a spiral tube heat exchanger for application in solar thermal systems. Journal of Thermal Engineering. 2025 Mar. 1;11(2):407-21. doi:10.14744/thermal.0000923