| Citation: | RUAN Shiting, ZHANG Jimin, CAO Jianguang, et al. Numerical simulation of melting process of phase change energy storage unit under microgravity[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(10): 2224-2231. doi: 10.13700/j.bh.1001-5965.2017.0791(in Chinese)
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In order to explore the melting process of phase change materials in the phase change energy storage unit with fins in microgravity environment, the heat transfer and flow characteristics of phase change materials in microgravity environment are investigated by numerical simulation. The accuracy of the numerical simulation was verified by comparing the numerical simulation results and experimental results in gravity environment. The numerical simulation results under both gravity and microgravity effects were compared to reveal the characteristics of the phase change material melt process in microgravity environment. The results show that when the phase change energy storage unit is in microgravity environment, the melting rate of the phase change material obviously decreases, and the heat is mainly transferred by the heat conduction. The expansion of the melted phase change material extends from the top to the space, and the local low temperature zone is in the upper-middle of the phase change energy storage unit.
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