International Scientific Journal


Paraffin melting is widely used in the fields of phase change materials energy storage, gathering and transportation pipe-line paraffin removal, etc. Analysis of the phase change mechanism and influencing factors of paraffin melting in the circular tube deeply has important guiding significance for improving the heat storage capacity by changing the structure of phase change material storage device and ensuring the safe transportation of crude-oil in the pipe-line. A double distribution lattice Boltzmann model based on enthalpy method is established to simulate the temperature field and the flow field of paraffin melting in a circular tube in this paper. The influence of different Rayleigh and Prandtl numbers on the paraffin melting process in a circular tube is analyzed. The results show that the natural-convection process is strengthened with the increase of the Rayleigh number, and the decrease of the average Nusselt number on the wall is smooth in the transition stage of wax melting due to the existence of fuzzy zone. The melting rate of paraffin can be accelerated or reduced by controlling the Prandtl number, so as to meet the relevant requirements of engineering.
PAPER REVISED: 2021-06-17
PAPER ACCEPTED: 2021-06-18
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THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 3, PAGES [2113 - 2123]
  1. Younsi, Z.,H. Naji, Numerical assessment of brick walls' use incorporating a phase change material towards thermal performance in buildings during a passive cooling strategy, Thermal Science, 24. (2020), 3 Part B, pp. 1909-1922, DOI No. 10.2298/tsci180302207y
  2. Mao, Q.,Y. Zhang, Thermal energy storage performance of a three-PCM cascade tank in a high-temperature packed bed system, Renewable Energy, 152. (2020), pp. 110-119, DOI No. 10.1016/j.renene.2020.01.051
  3. Zhang, J.M., et al., Flow and heat transfer performance of plate phase change energy storage heat exchanger, Thermal Science, 23. (2019), 3 Part B, pp. 1989-2000, DOI No. 10.2298/tsci170821072z
  4. Jiang, H., et al., Numerical study for removing wax deposition by thermal washing for the waxy crude oil gathering pipeline, Science Progress, 103. (2020), 3, p. 36850420958529, DOI No. 10.1177/0036850420958529
  5. Ali, H.M., Recent advancements in PV cooling and efficiency enhancement integrating phase change materials based systems - A comprehensive review, Solar Energy, 197. (2020), pp. 163-198, DOI No. 10.1016/j.solener.2019.11.075
  6. Li, R., et al., A novel composite phase change material with paraffin wax in tailings porous ceramics, Applied Thermal Engineering, 151. (2019), pp. 115-123, DOI No. 10.1016/j.applthermaleng.2019.01.104
  7. Liu, X., et al., Numerical Study on the Thermal Performance of a Phase Change Heat Exchanger (Pche) with Innovative Fractal Tree-Shaped Fins, Fractals, 28. (2020), 05, p. 2050083, DOI No. 10.1142/s0218348x20500838
  8. Xu, H.A.O., et al., Numerical Study on Melting Heat Transfer in Fractal Metal Foam, Fractals, 27. (2019), 06, p. 1950106, DOI No. 10.1142/s0218348x19501068
  9. Yu, C., et al., Role of metal foam in solidification performance for a latent heat storage unit, International Journal of Energy Research, 44. (2019), 3, pp. 2110-2125, DOI No. 10.1002/er.5069
  10. Zheng, J.-Y., et al., Effect of Pore Distribution on Melting Behavior of Paraffin in Fractal Metal Foam, Communications in Theoretical Physics, 70. (2018), 4, p. 501, DOI No. 10.1088/0253-6102/70/4/501
  11. GÜRel, B., A numerical investigation of the melting heat transfer characteristics of phase change materials in different plate heat exchanger (latent heat thermal energy storage) systems, International Journal of Heat and Mass Transfer, 148. (2020), p. 119117, DOI No. 10.1016/j.ijheatmasstransfer.2019.119117
  12. Zhang, C., et al., Improving the energy discharging performance of a latent heat storage (LHS) unit using fractal-tree-shaped fins, Applied Energy, 259. (2020), p. 114102, DOI No. 10.1016/j.apenergy.2019.114102
  13. Tan, F.L., et al., Experimental and computational study of constrained melting of phase change materials (PCM) inside a spherical capsule, International Journal of Heat and Mass Transfer, 52. (2009), 15-16, pp. 3464-3472, DOI No. 10.1016/j.ijheatmasstransfer.2009.02.043
  14. Li, W., et al., Advances and Future Challenges of Wax Removal in Pipeline Pigging Operations on Crude Oil Transportation Systems, Energy Technology, 8. (2020), 6, p. 1901412, DOI No. 10.1002/ente.201901412
  15. Xu, Y., et al., Heat transfer analysis of waxy crude oil under a new wide phase change partition model, Numerical Heat Transfer, Part A: Applications, 76. (2019), 12, pp. 991-1005, DOI No. 10.1080/10407782.2019.1677071
  16. Ghosh, D., et al., Numerical investigation of paraffin wax solidification in spherical and rectangular cavity, Heat and Mass Transfer, 55. (2019), 12, pp. 3547-3559, DOI No. 10.1007/s00231-019-02680-4
  17. Li, X., et al., Numerical investigation on the melting characteristics of wax for the safe and energy-efficiency transportation of crude oil pipelines, Measurement: Sensors, 10-12. (2020), p. 100022, DOI No. 10.1016/j.measen.2020.100022
  18. Sadeghi, R., et al., Three-dimensional lattice Boltzmann simulations of high density ratio two-phase flows in porous media, Computers & Mathematics with Applications, 75. (2018), 7, pp. 2445-2465, DOI No. 10.1016/j.camwa.2017.12.028
  19. Cailei, L., et al., Effect of heating modes on melting performance of a solid-liquid phase change using lattice Boltzmann model, International Communications in Heat and Mass Transfer, 108. (2019), p. 104330, DOI No. 10.1016/j.icheatmasstransfer.2019.104330
  20. Wen-Shu Jiaung, J.-R.H.C., Lattice Boltzmann Method for the Heat Conduction Problem with Phase Change, Numerical Heat Transfer, Part B: Fundamentals, 39. (2001), 2, pp. 167-187, DOI No. 10.1080/10407790150503495
  21. Dadvand, A., et al., Lattice Boltzmann simulation of natural convection in a square enclosure with discrete heating, Mathematics and Computers in Simulation, 179. (2021), pp. 265-278, DOI No. 10.1016/j.matcom.2020.07.025
  22. Rui, Z., et al., Comparative study on natural convection melting in square cavity using lattice Boltzmann method, Results in Physics, 18. (2020), p. 103274, DOI No. 10.1016/j.rinp.2020.103274
  23. Hu, Y., et al., Lattice Boltzmann simulation for three-dimensional natural convection with solid-liquid phase change, International Journal of Heat and Mass Transfer, 113. (2017), pp. 1168-1178, DOI No. 10.1016/j.ijheatmasstransfer.2017.05.116
  24. Lin, Q., et al., Lattice Boltzmann simulation of flow and heat transfer evolution inside encapsulated phase change materials due to natural convection melting, Chemical Engineering Science, 189. (2018), pp. 154-164, DOI No. 10.1016/j.ces.2018.05.052
  25. Yip, Y.H., et al., Flow-dynamics induced thermal management of crude oil wax melting: Lattice Boltzmann modeling, International Journal of Thermal Sciences, 137. (2019), pp. 675-691, DOI No. 10.1016/j.ijthermalsci.2018.09.033
  26. Gao, D.,Z. Chen, Lattice Boltzmann simulation of natural convection dominated melting in a rectangular cavity filled with porous media, International Journal of Thermal Sciences, 50. (2011), 4, pp. 493-501, DOI No. 10.1016/j.ijthermalsci.2010.11.010
  27. Guo, Z.,T.S. Zhao, A Lattice Boltzmann Model for Convection Heat Transfer in Porous Media, Numerical Heat Transfer, Part B: Fundamentals, 47. (2005), 2, pp. 157-177, DOI No. 10.1080/10407790590883405
  28. Jany P., Bejan A., Scaling theory of melting with natural convection in an enclosure, International Journal of Heat and Mass Transfer, 31. (1988), pp. 1221-1235, DOI No. 10.1016/0017-9310(88)90065-8

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