Investigation on Turbulent Nanofluid Flow in Helical Tube in Tube Heat Exchangers

Document Type : Full Lenght Research Article

Authors

University of Isfahan

Abstract

In this study, the thermal characteristics of turbulent nanofluid flow in a helical tube in the tube heat exchanger (HTTHE) were assessed numerically through computational fluid dynamics (CFD) simulation. The findings of both the turbulent models: realizable k-epsion (k-ε) and re-normalisation group (RNG) k-epsilon were compared. The temperature distribution contours show that realizable and RNG k-ε models, together with the swirl dominated flow are of more uniform temperature distributions. The proper prediction of two layer theory leads to having a uniform temperature distribution and proper dimensionless wall distance (Y+). The turbulent flow and heat transfer of two nanofluids (SiO2, Al2O3) and base fluid with respect to swirl dominated flow was simulated through the RNG model. The effects of the concentration of nanoparticles on heat transfer characteristics in HTTHE and two turbulent models were analyzed in a comprehensive manner. It is concluded that up to 1% concentration of SiO2 and 1% concentration of Al2O3, similar heat transfer characteristics are observed. Comparison between the CFD results with the predicted values for friction factor coefficient (f) and Nusselt number (Nu) calculated through experimental correlations indicate the maximum errors of 6.56% and 0.27%, respectively.

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References

[1] P. J. Fule, B. A. Bhanvase, S. H. Sonawane, Experimental investigation of heat transfer enhancement in helical coil heat exchangers using water based CuO nanofluid. Advanced Powder Technolology, 28(9) 2288-2294, (2017).
[2] A. Shahsavar, Z. Rahimi, M. Bahiraei, Optimization of irreversibility and thermal characteristics of a mini heat exchanger operated with a new hybrid nanofluid containing carbon nanotubes decorated with magnetic nanoparticles, Energy Conversion and Management, 150, 37-47, (2017).
[3] M. Zeeshan, S. Nath, D. Bhanja, Numerical study to predict optimal configuration of fin and tube compact heat exchanger with various tube shapes and spatial arrangements, Energy Conversion and Managment, 148, 737-752, (2017).
[4] R. S. Dondapati, V. Saini, K. N. Verma, P. R. Usurumarti, Computational prediction of pressure drop and heat transfer with cryogen based nanofluids to be used in micro-heat exchangers, International Journal of Mechanic Science, 130, 133-142, (2017).
[5] W. I. A. Aly, Numerical study on turbulent heat transfer and pressure drop of nanofluid in coiled tube-in-tube heat exchangers. Energy Conversion and Management, 79, 304-316, (2014).
[6] K. Narrein, H. A. Mohammed, Influence of nanofluids and rotation on helically coiled tube heat exchanger performance, Thermochimica Acta, 564, 13-23, (2013).
[7] P. Pongsoi, S. Pikulkajorn, S. Wongwises, Effect of fin pitches on the optimum heat transfer performance of crimped spiral fin-and-tube heat exchangers, International Journal of Heat and Mass Transfer, 55(23), 6555-6566, (2012).
[8] D. R. Ray, D. K. Das, R. S. Vajjha, Experimental and numerical investigations of nanofluids performance in a compact minichannel plate heat exchanger, International Journal of Heat and Mass Transfer, 71, 732-746, (2014).
[9] Z. Zhao, D. Che, Influence of tube arrangement on the thermal hydraulic performance of a membrane helical-coil heat exchanger, Numerical Heat Transfer, Part A: Applications, 62(7), 565-588, (2012).
[10]N. K. Gupta, A. K. Tiwari, S. K. Ghosh, Heat transfer mechanisms in heat pipes using nanofluids – A review. Experimental Thermal Fluid Science, 90, 84-100, (2018).
[11]R. S. Vajjha, D. K. Das, Experimental determination of thermal conductivity of three nanofluids and development of new correlations, International Journal of Heat and Mass Transfer, 52(21), 4675-4682, (2009).
[12]S. M. Hashemi, M. Akhavan-Behabadi, An empirical study on heat transfer and pressure drop characteristics of CuO–base oil nanofluid flow in a horizontal helically coiled tube under constant heat flux, International Communications in Heat and Mass Transfer, 39, 144-151, (2012).
[13]H. R. Allahyar, F. Hormozi, B. ZareNezhad, Experimental investigation on the thermal performance of a coiled heat exchanger using a new hybrid nanofluid, Experimental Thermal and Fluid Science, 76, 324-329, (2016).
[14]M. Moahammadi, M. Hemmat Esfe, Buoyancy driven heat transfer of a nanofluid in a differentially heated square cavity under effect of an adiabatic square baffle, Journal of Heat and Mass Transfer Research, 1, 1–13, (2015).
[15]A. Z. M. Tajik Jamal-Abad, M. Dehghan, Analysis of variance of nano fluid heat transfer data for forced convection in horizontal spirally coiled tubes, Journal of Heat and Mass Transfer Research, 2, 45–50, (2015).
[16]U. Rea, T. McKrell, L.W. Hu, J. Buongiorno, Laminar convective heat transfer and viscous pressure loss of alumina–water and zirconia–water nanofluids, International Journal of Heat and Mass Transfer, 52(7), 2042-2048, (2009).
[17]V. Gnielinski, Heat transfer and pressure drop in helically coiled tubes, Proceedings 8th International Heat Transfer Conference, San Francisco, Hemisphere, Washington DC, 6, 2847-2854, (1986).
[18]P. Mishra, S. N. Gupta, Momentum transfer in curved pipes. 2. Non-Newtonian fluids. Industrial & Engineering Chemistry Process Design and Development, 18(1), 137-142, (1979).
[19]H. Ito, Friction factors for turbulent flow in curved pipes, Journal of Basic Engineering, 81(2), 123-134, (1959).
[20]H. Yarmand, S. Gharehkhani, S. N. Kazi, E. Sadeghinezhad, M.R. Safaei, Numerical investigation of heat transfer enhancement in a rectangular heated pipe for turbulent nanofluid, The Scientific World Journal, Article ID 369593, 2014, 1-9, (2014).
[21]V. Bianco, F. Chiacchio, O. Manca, S. Nardini, Numerical investigation of nanofluids forced convection in circular tubes, Applied Thermal Engineering, 29(17), 3632-3642, (2009).
 [22]A. Kumar, A. Kumar, A. Rai, Characterization of TiO2, Al2O3 and SiO2 Nanoparticle based Cutting Fluids, Material Today Proceedings, 3(6), 1890–1898, (2016).
[23]Z. Hajabdollahi, H. Hajabdollahi, P. F. Fu, The effect of using different types of nanoparticles on optimal design of fin and tube heat exchanger, Asia Pacific Journal of Chemical Engineering, 1–14, (2017).
[24] K. S. Mikkola, V. Puupponen, S. Granbohm, H. A. Ala-Nissila, T. Seppälä, Influence of particle properties on convective heat transfer of nanofluids, International Journal of Thermal Science, 3, 101-114, (2016).
[25]H. Blasius, The boundary layers in fluids with little friction, Zeitschrift fuer Mathematik und Physik, 56(1), 1-37, (1950).
[26]D. Wen, Y. Ding, Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions, International Journal of Heat and Mass transfer, 47(24), 5181-5188, (2004).
[27] W. M. El-Maghlany, A.A. Hanafy, A.A. Hassan, M.A. El-Magid, Experimental study of Cu–water nanofluid heat transfer and pressure drop in a horizontal double-tube heat exchanger, Experimental Thermal and Fluid Science, 78, 100-111, (2016).

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History

  • Receive Date: 04 November 2017
  • Revise Date: 12 August 2018
  • Accept Date: 18 August 2018

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