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Numerical study to optimize the melting process of phase change material coupled with extra fluid

Khademi, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.2514/6.2020-1932
  3. Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA , 2020
  4. Abstract:
  5. Several methods have been proposed and explored to improve the performance of the energy storage unit. This work numerically investigates the melting process of a phase change material in a rectangular enclosure in presence of an auxiliary fluid considering different volume ratios. This investigation aims to obtain the volume ratio at which the amount of energy storage in the system becomes optimized for a specified time period. Oleic acid with a melting point of 13.5 °C is selected as the phase change material and water as a fluid with a higher density than oleic acid is chosen as the auxiliary fluid. Imposing the auxiliary fluid on top of the oleic acid, a displacement occurs between the two materials during the melting of oleic acid. This displacement is because of the density difference between the two materials. It improves the energy storage efficiency, i.e., higher energy storage in shorter time. To find the optimum state and compare the system performance in different volume ratios, four different volume ratios are investigated including those of 25%, 37.5%, 50%, and 67.5% oleic acid. The amounts of stored energy in the system of these four states are compared with each other subsequently. This study quantifies the effect of auxiliary fluid volume on the melting process and the amount of stored energy carefully. © 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved
  6. Keywords:
  8. Source: AIAA Scitech Forum, 2020, 6 January 2020 through 10 January 2020 ; Volume 1 PartF , 2020
  9. URL: https://arc.aiaa.org/doi/10.2514/6.2020-1932