Convective Heat Transfer During Melting in a Solar LHTES
Published online first on May 28, 2021.
Melting combined with natural convection in a shell and Latent Thermal Energy Storage (LHTES) tube driven by a solar collector was analyzed numerically in the present work. This work's particularity lies in the fact that the HTF temperature varies at each moment following the solar irradiance curve. A program (UDF) has been developed and integrated into Ansys to meet this requirement. The use of this coupling strategy allows obtaining realistic unsteady LHTES results. Several numerical investigations were carried out to analyze the effect of the heat sources' power on the accumulator's performance. The obtained results show that natural convection considerably influences the heat transfer as well as the melting kinetics of the Phase Change Material (PCM). Besides, the results show that increasing the heat transfer fluid's thermal load can increase the melting rate of the PCM and the stored energy and reduce the entire melting time.
Keywords:natural convection, solar coupling, PCM melting
H. Hu and S. A. Argyropoulos, "Mathematical modelling of solidification and melting: a review," Modelling and Simulation in Materials Science and Engineering, vol. 4, no. 4, pp. 371–396, Jul. 1996. DOI: https://doi.org/10.1088/0965-0393/4/4/004
Y. Dutil, D. R. Rousse, N. B. Salah, S. Lassue, and L. Zalewski, "A review on phase-change materials: Mathematical modeling and simulations," Renewable and Sustainable Energy Reviews, vol. 15, no. 1, pp. 112–130, Jan. 2011. DOI: https://doi.org/10.1016/j.rser.2010.06.011
N. B. Khedher, "Numerical Study of the Thermal Behavior of a Composite Phase Change Material (PCM) Room," Engineering, Technology & Applied Science Research, vol. 8, no. 2, pp. 2663–2667, Apr. 2018. DOI: https://doi.org/10.48084/etasr.1824
Z. Tan, K. M. Lim, and B. C. Khoo, "An adaptive mesh redistribution method for the incompressible mixture flows using phase-field model," Journal of Computational Physics, vol. 225, no. 1, pp. 1137–1158, Jul. 2007. DOI: https://doi.org/10.1016/j.jcp.2007.01.019
E. M. Sparrow, S. V. Patankar, and S. Ramadhyani, "Analysis of Melting in the Presence of Natural Convection in the Melt Region," Journal of Heat Transfer, vol. 99, no. 4, pp. 520–526, Nov. 1977. DOI: https://doi.org/10.1115/1.3450736
C. Benard, D. Gobin, and F. Martinez, "Melting in Rectangular Enclosures: Experiments and Numerical Simulations," Journal of Heat Transfer, vol. 107, no. 4, pp. 794–803, Nov. 1985. DOI: https://doi.org/10.1115/1.3247506
H. Rieger, U. Projahn, M. Bareiss, and H. Beer, "Heat Transfer During Melting Inside a Horizontal Tube," Journal of Heat Transfer, vol. 105, no. 2, pp. 226–234, May 1983. DOI: https://doi.org/10.1115/1.3245567
M. Okada, "Analysis of heat transfer during melting from a vertical wall," International Journal of Heat and Mass Transfer, vol. 27, no. 11, pp. 2057–2066, Nov. 1984. DOI: https://doi.org/10.1016/0017-9310(84)90192-3
P. Jany and A. Bejan, "Scaling theory of melting with natural convection in an enclosure," International Journal of Heat and Mass Transfer, vol. 31, no. 6, pp. 1221–1235, Jun. 1988. DOI: https://doi.org/10.1016/0017-9310(88)90065-8
X. Sun, Y. Chu, Y. Mo, S. Fan, and S. Liao, "Experimental investigations on the heat transfer of melting phase change material (PCM)," Energy Procedia, vol. 152, pp. 186–191, Oct. 2018. DOI: https://doi.org/10.1016/j.egypro.2018.09.079
A. Memon, G. Mishra, and A. K. Gupta, "Buoyancy-driven melting and heat transfer around a horizontal cylinder in square enclosure filled with phase change material," Applied Thermal Engineering, vol. 181, Nov. 2020, Art. no. 115990. DOI: https://doi.org/10.1016/j.applthermaleng.2020.115990
N. Mallya and S. Haussener, "Buoyancy-driven melting and solidification heat transfer analysis in encapsulated phase change materials," International Journal of Heat and Mass Transfer, vol. 164, Jan. 2021, Art. no. 120525. DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2020.120525
A. S. Soliman, S. Zhu, L. Xu, J. Dong, and P. Cheng, "Numerical simulation and experimental verification of constrained melting of phase change material in cylindrical enclosure subjected to a constant heat flux," Journal of Energy Storage, vol. 35, Mar. 2021, Art. no. 102312. DOI: https://doi.org/10.1016/j.est.2021.102312
M. A. Aichouni, N. F. Alshammari, N. B. Khedher, and M. Aichouni, "Experimental Evaluation of Nano-Enhanced Phase Change Materials in a Finned Storage Unit," Engineering, Technology & Applied Science Research, vol. 10, no. 3, pp. 5814–5818, Jun. 2020. DOI: https://doi.org/10.48084/etasr.3616
V. R. Voller and C. Prakash, "A fixed grid numerical modelling methodology for convection-diffusion mushy region phase-change problems," International Journal of Heat and Mass Transfer, vol. 30, no. 8, pp. 1709–1719, Aug. 1987. DOI: https://doi.org/10.1016/0017-9310(87)90317-6
A. Egea, J. P. Solano, J. Pérez-García, and A. García, "Solar-driven melting dynamics in a shell and tube thermal energy store: An experimental analysis," Renewable Energy, vol. 154, pp. 1044–1052, Jul. 2020. DOI: https://doi.org/10.1016/j.renene.2020.03.078
F. P. Incropera, D. P. DeWitt, T. L. Bergman, and A. S. Lavine, Fundamentals of Heat and Mass Transfer, 6th ed. Hoboken, NJ, USA: John Wiley & Sons, 2006.
How to Cite
MetricsAbstract Views: 116
PDF Downloads: 93
Copyright (c) 2021 Authors
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.