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TECHNICAL PAPERS

Effect of Cell Geometry on the Freezing and Melting Processes inside a Thermal Energy Storage Cell

[+] Author and Article Information
Abel Hernández-Guerrero, Salvador M. Aceves

Lawrence Livermore National Laboratory, Livermore, CA 94551, USAe-mail: saceves@llnl.gov

Eduardo Cabrera-Ruiz

Facultad de Ingenierı́a, Universidad de Guanajuato, Apartado Postal 215, Salamanca, GTO., 36730, Mexico

Ricardo Romero-Méndez

CIEP-FI, Universidad Autónoma de San Luis Potosı́, Edificio P, Zona Universitaria, 78290, San Luis Potosı́, Mexicoe-mail: rromerom@uaslp.mx

J. Energy Resour. Technol 127(2), 95-102 (May 18, 2005) (8 pages) doi:10.1115/1.1789517 History: Received January 09, 2001; Revised March 25, 2004; Online May 18, 2005
Copyright © 2005 by ASME
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References

Figures

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Charge process, Case 1. The bottom wall is at a constant and uniform temperature
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Charge process, Case 2. The energy source is a fluid flowing under cell with constant inlet temperature
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Percentage of the PCM mass in liquid state as a function of time for Case 1 for aspect ratios than unity
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Percentage of the PCM mass in liquid state as a function of time for Case 1 for aspect ratios greater than unity
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Stored energy as a function of time for Case 1 for cells with aspect ratio less than unity
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Stored energy as a function of time for Case 1 for cells with aspect ratio greater than unity
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Position of the solid-liquid interface as a function of time for Case 1 for cells with aspect ratios of 1/3 and 2/5
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Streamlines in the liquid phase of a thermal energy storage cell with aspect ratio of 2 for Case 1 at different times during the melting process. (a) t=520 s, (b) 900 s, (c) 1205, (d) 1455 s
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Interface positions as a function of time for Case 2 for a cell with aspect ratio equal to 2/3
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Interface history positions for Case 2 with an aspect ratio of 3/2
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Evolution of streamlines as a function of time for Case 2, aspect ratio of 2; (a) t=520 s, (b) t=900 s, (c) t=1205 s, (d) t=1455 s
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Percentage of the PCM mass in solid state as a function of time for Case 3 for cells with aspect ratio less than unity
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Percentage of the PCM mass in solid state as a function of time for Case 3 for cells with aspect ratio greater than unity
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Interface history positions for a cell with aspect ratio equal to 2, for Case 3
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Isotherms for time=1050 s, when aspect ratio is equal to 1/2, for Case 4

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