Convective heat transfer and friction factor characteristics of molten salts in spirally fluted tubes

Zhang, Sheng; Sun, Xiaodong

doi:10.1016/j.tsep.2022.101264

Title: Convective heat transfer and friction factor characteristics of molten salts in spirally fluted tubes

Journal Article · 01 March 2022 · Thermal Science and Engineering Progress

DOI: https://doi.org/10.1016/j.tsep.2022.101264 · OSTI ID:1981782

Zhang, Sheng ^[1]; Sun, Xiaodong ^[1]

University of Michigan, Ann Arbor, MI (United States)

Spirally fluted tubes have been widely used for heat exchangers due to their superior heat transfer enhancement. However, most of the previous studies focused on the effects of a limited number of geometric parameters, i.e., the flute pitch and flute depth, on convective heat transfer and friction factor characteristics of low-Prandtl-number fluids, i.e., air and water. The correlations developed in these studies may not be accurate or applicable for medium-Prandtl-number fluids, such as molten salts. A numerical analysis using a Computational Fluid Dynamics (CFD) tool, STAR–CCM+, is therefore carried out in this study to systematically investigate the effects of four geometric parameters, including the flute pitch ρ, flute depth e, flute start number N_s (or flute helix angle θ), and trough length L_tr on convective heat transfer and friction factor characteristics of a medium-Prandtl-number fluid, FLiNaK (46.5LiF-11.5NaF-42KF mol %), in spirally fluted tubes. Additionally, the convective heat transfer and Darcy friction factor correlations are proposed and validated, with ± 20% uncertainties, for medium-Prandtl-number fluids under the following conditions: Re = 88–1600, Pr = 2.5–40, ρ/D_c= 0.44–3.51, e/D_c = 0.10–0.40, θ/90= 0.20–0.81, and L_tr/D_c = 0.71–2.16. The correlations proposed help improve the design of spirally fluted-tube heat exchangers.

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Research Organization:: University of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)

OSTI ID:: 1981782

Journal Information:: Thermal Science and Engineering Progress, Journal Name: Thermal Science and Engineering Progress Journal Issue: C Vol. 30; ISSN 2451-9049

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (17)

Performance of heat transfer and pressure drop in a spirally indented tube Lee, Sang Chun; Nam, Sang Chul; Ban, Tae Gon KSME International Journal, Vol. 12, Issue 5 https://doi.org/10.1007/BF02945559	journal	September 1998
Effects of spiral start number and depth ratio of corrugated tube on flow and heat transfer characteristics in turbulent flow region Kongkaitpaiboon, V.; Promthaisong, P.; Chuwattanakul, V. Journal of Mechanical Science and Technology, Vol. 33, Issue 8 https://doi.org/10.1007/s12206-019-0745-8	journal	August 2019
Experimental investigation of heat transfer and pressure drop characteristics of flow through spirally fluted tubes Srinivasan, Vijayaraghavan; Christensen, Richard N. Experimental Thermal and Fluid Science, Vol. 5, Issue 6 https://doi.org/10.1016/0894-1777(92)90126-P	journal	November 1992
Enhanced heat transfer of drag reducing surfactant solutions with fluted tube-in-tube heat exchanger Qi, Yunying; Kawaguchi, Yasuo; Lin, Zhiqing International Journal of Heat and Mass Transfer, Vol. 44, Issue 8 https://doi.org/10.1016/S0017-9310(00)00203-9	journal	April 2001
A coupled heat transfer and tritium mass transport model for a double-wall heat exchanger design for FHRs Zhang, Sheng; Wu, Xiao; Shi, Shanbin Annals of Nuclear Energy, Vol. 122 https://doi.org/10.1016/j.anucene.2018.08.039	journal	December 2018
Numerical study on convective heat transfer and friction characteristics of molten salts in circular tubes Zhang, Sheng; Sun, Xiaodong; Dominguez-Ontiveros, Elvis E. Annals of Nuclear Energy, Vol. 142 https://doi.org/10.1016/j.anucene.2020.107375	journal	July 2020
Heat transfer enhancement in three-start spirally corrugated tube: Experimental and numerical study Kareem, Zaid S.; Abdullah, Shahrir; Lazim, Tholudin M. Chemical Engineering Science, Vol. 134 https://doi.org/10.1016/j.ces.2015.06.009	journal	September 2015
Experimental investigation on heat transfer and frictional characteristics of spirally corrugated tubes in turbulent flow at different Prandtl numbers Vicente, P. G.; Garcı́a, A.; Viedma, A. International Journal of Heat and Mass Transfer, Vol. 47, Issue 4 https://doi.org/10.1016/j.ijheatmasstransfer.2003.08.005	journal	February 2004
Experimental investigation of heat transfer and friction characteristic of fully developed gas flow in single-start and three-start corrugated tubes Harleß, A.; Franz, E.; Breuer, M. International Journal of Heat and Mass Transfer, Vol. 103 https://doi.org/10.1016/j.ijheatmasstransfer.2016.07.087	journal	December 2016
Effects of pitch and corrugation depth on heat transfer characteristics in six-start spirally corrugated tube Jin, Zhi-jiang; Chen, Fu-qiang; Gao, Zhi-xin International Journal of Heat and Mass Transfer, Vol. 108 https://doi.org/10.1016/j.ijheatmasstransfer.2016.12.091	journal	May 2017
3D numerical study on shell side heat transfer and flow characteristics of rod-baffle heat exchangers with spirally corrugated tubes Liu, J. J.; Liu, Z. C.; Liu, W. International Journal of Thermal Sciences, Vol. 89 https://doi.org/10.1016/j.ijthermalsci.2014.10.011	journal	March 2015
Heat transfer and fluid flow behaviors in a five-start spiral corrugated tube Promthaisong, Pitak; Jedsadaratanachai, Withada; Chuwattanakul, Varesa AIP Conference Proceedings https://doi.org/10.1063/1.5000461	conference	January 2017
Convective and Radiative Heat Transfer in Molten Salts Zhang, Sheng; Sun, Xiaodong Nuclear Technology, Vol. 206, Issue 11 https://doi.org/10.1080/00295450.2020.1749481	journal	July 2020
Characterization of the Effect of Corrugation Angles on Hydrodynamic and Heat Transfer Performance of Four-Start Spiral Tubes Chen, X. D.; Xu, X. Y.; Nguang, S. K. Journal of Heat Transfer, Vol. 123, Issue 6 https://doi.org/10.1115/1.1409261	journal	April 2001
Heat Transfer and Pressure Drop Characteristics of Spirally Fluted Annuli: Part I—Hydrodynamics Garimella, S.; Christensen, R. N. Journal of Heat Transfer, Vol. 117, Issue 1 https://doi.org/10.1115/1.2822323	journal	February 1995
Heat Transfer and Pressure Drop Characteristics of Spirally Fluted Annuli: Part II—Heat Transfer Garimella, S.; Christensen, R. N. Journal of Heat Transfer, Vol. 117, Issue 1 https://doi.org/10.1115/1.2822324	journal	February 1995
Experimental Investigation, Modeling and Prediction of Friction Factors and Friction Increase Ratio for Flow Through Spirally Fluted Tubes Srinivasan, Vijayaraghavan; Vafai, Kambiz; Christensen, Richard N. Journal of Enhanced Heat Transfer, Vol. 1, Issue 4 https://doi.org/10.1615/JEnhHeatTransf.v1.i4.50	journal	January 1994

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convective heat transfer
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laminar flow
molten salt
spirally fluted tube

Title: Convective heat transfer and friction factor characteristics of molten salts in spirally fluted tubes

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