THERMAL SCIENCE

International Scientific Journal

Nandhakumar Shankar

,

Perumalsamy Sethusundaram Parambakkattur

,

Mohanraj Chandran

HEAT TRANSFER ENHANCEMENT IN A HELICALLY COILED CONVERGENT AND DIVERGENT TUBE HEAT EXCHANGER WITH AL2O3 NANOFLUID

ABSTRACT
In this investigation, the analysis of the heat transfer coefficient of a shell, helically coiled convergent-divergent tube heat exchanger has been carried out by utilizing Al2O3-water nanofluid. The nanofluid was prepared using a two-stage technique with proportions of 0.1 vol.%, 0.3 vol.%, and 0.5 vol.%. The inner heat transfer coefficient, overall heat transfer coefficient, and Nusselt number were analyzed and it found that the heat transfer coefficient is increased, with increase of inner dean number and particle volume concentration. The experimental tests were carried out in the range of Dean number, 1100 < De < 4200. When compared to base fluid, the overall heat transfer coefficient improved by 27%, 55%, and 78% at 0.1%, 0.3% and 0.5% with Al2O3-water nanofluid, respectively. When compared to base fluid at a fixed dean number, the increase in Nusselt number was viewed as 27%, 51%, and 72% at 0.1%, 0.3%, and 0.5% of Al2O3- water nanofluid, respectively. The investigations of enhancement were increased due to increased nanofluid thermal conductivity while increasing the vol.% concentration and Brownian movement of the nanoparticles. The viscosity of nanofluid is increased with increase of particle volume which increase the pressure drop. It is concluded the convergent-divergent helically coiled tube heat exchangers along with nanofluid is able to enhance the heat transfer with considerable pressure drop. There is no adverse effect on the development of optional streams or the blending of liquids.
KEYWORDS
Convergent-divergent helically coiled tube (CDHCT), nanofluid, Al2O3, heat transfer coefficient
PAPER SUBMITTED: 2022-12-05
PAPER REVISED: 2023-06-01
PAPER ACCEPTED: 2023-06-12
PUBLISHED ONLINE: 2023-07-16
DOI REFERENCE: https://doi.org/10.2298/TSCI221205140S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 6, PAGES [4707 - 4718]
REFERENCES
  1. Choi, U. S., Enhancing Thermal Conductivity of Fluids with Nanoparticles, Developments and Applications of Non-Newtonian Flows, FED-Vol. 231/MD-Vol. 66 (1995), ASME, New York, pp. 99- 105
  2. Purandare, P. S., et al., Experimental Investigation on Heat Transfer and Pressure Drop, Thermal Science, 20 (2016), 6, pp. 2087-2099
  3. Akhavan-Behabadi, M. A., et al., An Experimental Study on Heat Transfer and Pressure Drop of MWCNT-Water Nano-Fluid Inside Horizontal Coiled Wire Inserted Tube, International Communications in Heat and Mass Transfer, 63 (2015), Apr., pp. 62-72
  4. Mukesh Kumar, P. C., et al., Experimental Investigation on Convective Heat Transfer and Friction Factor in a Helically Coiled Tube with Al2O3/Water Nanofluid, J. Mech. Sci. Technol., 27 (2013), 1, pp. 239-245
  5. Palanisamy, K., et al., Heat Transfer Enhancement and Pressure Drop Analysis of a Cone Helical Coiled Tube Heat Exchanger using MWCNT/Water Nanofluid, Journal of Applied Fluid Mechanics, 10 (2017), Feb., pp. 7-13
  6. Kumar, P. C., Chandrasekar, M., Heat Transfer and Friction Factor Analysis of MWCNT Nanofluids in Double Helically Coiled Tube Heat Exchanger, Journal of Thermal Analysis and Calorimetry, 144 (2021), Feb., pp. 219-231
  7. Ashkan, A., Optimal and Critical Values of Geometrical Parameters of Shell and Helically Coiled Tube Heat Exchangers, Case Studies in Thermal Engineering, 10 (2017) Sept., pp. 73-78
  8. Fule, P. J., Experimental Investigation of Heat Transfer Enhancement in Helical Coil Heat Exchangers Using Water-Based CuO Nanofluid, Advanced Powder Technology, 28 (2017), 9, pp. 2288-2294
  9. Rakhsha, M., et al., Experimental and Numerical Investigation of Turbulent Forced Convection Flow of Nano-Fluid in Helically Coiled Tubes at Constant Surface Temperature, Powder Technology, 283 (2015), Oct., pp. 178-189
  10. Tiwari, A., et al., Particle Concentration Levels of Various Nanofluids in Plate Heat Exchanger for Best Performance, International Journal of Heat and Mass Transfer, 89 (2015), Oct., pp. 1110-1118
  11. Hamdi, E., et al., Experimental Study of Heat Transfer Augmentation in Non-Circular Duct Using Combined Nanofluids and Vortex Generator, International Journal of Heat and Mass Transfer, 90 (2015), Nov., pp. 1197-1206
  12. Sundar, L. S., Sharma, K. V., Turbulent Heat Transfer and Friction Factor of Al2O3 Nanofluid in a Circular Tube With Twisted Tape Inserts, Int. J. Heat Mass Transf., 53 (2010), 7-8, pp. 1409-1416
  13. Sheikholeslami, M., et al., Application of Neural Network for Estimation of Heat Transfer Treatment of Al2O3-H2O Nanofluid Through a Channel, Comput. Methods Appl. Mech. Eng., 344 (2019), Feb., pp. 1-12
  14. Nazari, M., et al., Experimental Study of Convective Heat Transfer of a Nanofluid Through a Pipe Filled with Metal Foam, International Journal of Thermal Sciences, 88 (2015), Feb., pp. 33-39
  15. Saeedinia, M., et al., Experimental Study on Heat Transfer and Pressure Drop of Nanofluid-flow in a Horizontal Coiled Wire Inserted Tube Under Constant Heat Flux, Exp. Therm. Fluid Sci., 36 (2012), Jan., pp. 158-168
  16. Naik, M. T., et al., Comparative Study on The Thermal Performance of Twisted Tape and Wire Coil Inserts in Turbulent Flow Using CuO/Water Nanofluid, Exp. Therm. Fluid Sci., 57 (2014), Sept., pp. 65- 76
  17. Kumar, A., et al., Heat Transfer Enhancement using Non-Newtonian Nanofluids in a Shell and Helical Coil Heat Exchanger, Experimental Thermal and Fluid Science, 90 (2017), Jan., pp. 132-142
  18. Shanmugam, R., et al., Comparative study of Nusselt Number for A Single-Phase Fluid-flow Using a Plate Heat Exchanger, Thermal Science, 20 (2016), Suppl. 4, pp. S929-S935
  19. Cong, Q., et al., Experimental Study on the Flow and Heat Transfer Characteristics of Nanofluids in Double-Tube Heat Exchangers Based on Thermal Efficiency Assessment, Energy Conversion and Management, 197 (2019), 111877
  20. Rasheed, A. H., et al., Experimental and Numerical Investigations of Heat Transfer Enhancement in Shell and Helically Microtube Heat Exchanger Using Nanofluids, International Journal of Thermal Sciences, 159 (2021), 106547
  21. Radkar, R. N., et al., Intensified Convective Heat Transfer Using ZnO Nanofluids in Heat Exchanger with Helical Coiled Geometry at Constant Wall Temperature, Materials Science for Energy Technologies, 2 (2019), 2, pp. 161-170
  22. Bhattad, A., et al., Experimentation on Effect of Particle Ratio on Hydrothermal Performance of Plate Heat Exchanger Using Hybrid Nanofluid, Applied Thermal Engineering, 162 (2019), 114309
  23. Sundar, L. S., et al., Heat Transfer and Effectiveness Experimentally-Based Analysis of Wire Coil with Core-Rod Inserted in Fe3O4/Water Nanofluid-flow in a Double Pipe U-Bend Heat Exchanger, International Journal of Heat and Mass Transfer, 134 (2019), May, pp. 405-419
  24. Palanisamy, K., et al., Experimental Investigation on Convective Heat Transfer and Pressure Drop of Cone Helically Coiled Tube Heat Exchanger Using Carbon Nanotubes/Water Nanofluids, Heliyon, 5 (2019), 5, e01705
  25. Hwang, K. S., et al., Flow and Convective Heat Transfer Characteristics of Water-Based Al2O3 Nanofluids in Fully Developed Laminar Flow Regime, Heat Mass Transf., 52 (2009), 1-2, pp. 193-199
  26. Kumar, J., et al., Heat Transfer Enhancement in a Helically Coiled Tube with Al2O3/Water Nanofluid Under Laminar Flow Condition, International Journal of Nanoscience, 11 (2012), 5, 1250029
  27. Ghadimi, A., et al., A Review of Nanofluid Stability Properties and Characterization in Stationary Conditions, International Journal of Heat and Mass Transfer, 54 (2011), 17-18, pp. 4051-4068
  28. Gallego, A., et al., Experimental Evaluation of the Effect in the Stability and Thermophysical Properties of Water-Al2O3 Based Nanofluids Using SDBS as Dispersant Agent, Advanced Powder Technology, 31 (2020), 2, pp. 560-570
  29. ASM International., et al., Metallography and Microstructures, ASM Handbook, Almere, The Netherlands, No. 9, 2004
PDF VERSION [DOWNLOAD]
Heat transfer enhancement in a helically coiled convergent and divergent tube heat exchanger with Al2O3 nanofluid

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence