International Scientific Journal


Computational fluid dynamics is used to study the effect of temperature on flow structure and disk friction loss for different working fluids in a high temperature molten salt pump, which is used for concentrating solar power, the velocity profile and pressure distribution in the first stage of the pump model and the effect of the fluid property on the ring leakage, disk friction loss as well as the shear stress distribution on shroud are analyzed for the pure water and the molten salt with temperature 300°C and 565°C respectively. The main findings can be concluded as: the working fluids have little effect on pump performance and internal velocity distribution whereas the pressure of the flow field would increase with the fluid density, with the increase of the fluid viscosity, the shear stress inside the ring also increases and the total leakage can be eliminated evidently, the increase of the fluid density and viscosity show the significant responsibility for the disk friction loss, in which the fluid viscosity also increases the disk friction loss, and the viscosity is one of the most influential factors for the shroud shear stress and it can be observed that the shear stress on front shroud is higher than that on the rear shroud. It is believed that the present work can deep the understandings of the fluid structures inside the molten salt pump, which can provide some guidelines to improve the pump performance and optimize the pump structure.
PAPER REVISED: 2019-06-18
PAPER ACCEPTED: 2019-08-18
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THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 4, PAGES [2347 - 2356]
  1. Hunt, J. Handling Molten salt for Sun Power, World Pumps, 1 (2011), Jan., pp. 22-26
  2. Ortega, J. I., Burgaleta, J. I., TéLlez F M. Central Receiver System Solar Power Plant Using Molten Salt as Heat Transfer Fluid, Journal of Solar Energy Engineering, 130 (2008), 2, pp. 247-266
  3. Zavoico, A. B., Solar Power Tower Design Basis Document, Revision 0, Office of Scientific & Tech-nical Information Technical Reports, Sandia National Laboratory, Albuquerque, N. Mex., USA, 2001
  4. Nunes, V. M. B., et al., Viscosity of Molten Sodium Nitrate, International Journal of Thermophysics, 27 (2006), 6, pp. 1638-1649
  5. Roberto, S. L., et al., Molten Salts Database for Energy Applications, Chemical Engineering & Pro-cessing Process Intensification, 73 (2013), Nov., pp. 87-102
  6. Nunes, V. M. B., et al., Molten Salts as Engineering Fluids - A Review:Part I. Molten Alkali Nitrates, Applied Energy, 183 (2016), Dec., pp. 603-611
  7. Chen, Y. C., et al. Experimental Study of Viscosity Characteristics of High-Temperature Heat Transfer Molten Salts, Science China Technological Sciences, 54 (2012), Aug., ID 3022
  8. Cheng, W. J., et al., Numerical Analysis of Unsteady Flow in Molten Salt Pump for Different Viscosi-ties, Journal of Nanjing Tech University, 37 (2015), 5, pp. 102-107
  9. Xiao, C., et al., Effects of Molten Salt Density on the Performances of Molten Salt Pump, Light Industry Machinery, 32 (2014), 4, pp. 5-8
  10. Daily, J. W., et al., Chamber Dimension Effects on Induced Flow and Frictional Resistance of Enclosed Rotating Disks, Journal of Basic Engineering, 82 (1960), 1, ID 217
  11. Li, W. G., Effects of Viscosity of Fluids on Centrifugal Pump Performance and Flow Pattern in the Im-pelle, International Journal of Heat & Fluid Flow, 21 (2000), 2, pp. 207-212
  12. Shao, C. L., et al., Experiment and Numerical Simulation of External Performances and Internal Flow of a Molten Salt Pump, Journal of Aerospace Power, 31 (2016), 8, pp. 1935-1942
  13. Yang, M. G., et al., Interior Flow and Unsteady Performance of Molten Salt Pump with Splitter Space Guide Vane, Journal of Drainage and Irrigation Machinery Engineering, 33 (2015), 4, pp. 306-310
  14. Li, Y. X., et al., Influence of Volute Structure on Performance of Vertically-Installed High-Temperature Molten-Salt Pump, Journal of Chemical Industry and Engineering, 64 (2013), 8, pp. 2853-2859
  15. Guan, X. F., Modern Pumps Theory and Design, China Aerospace Press, Beijing, 2011
  16. Gao, B., et al., Effect of Wear-Ring Clearance on Performance and Flow Characteristics of Centrifugal Pump, Journal of drainage and irrigation machinery engineering, 35 (2017), 1, pp. 13-17
  17. Shi, W. D., et al., Influence on Performance of Submersible Well Pump Changing Clearance of Wear-Rings, Journal of Drainage & Irrigation Machinery Engineering, 118 (2013), 1, pp. 69-73
  18. Gulich, J. F., Centrifugal Pumps, Springer-Verlag, Berlin, Germany, 2014

© 2023 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