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RESEARCH PAPERS

Heat Transfer During Phase Change of Paraffin Wax Stored in Spherical Shells

[+] Author and Article Information
Hisham Ettouney, Hisham El-Dessouky, Amani Al-Ali

Department of Chemical Engineering, College of Engineering and Petroleum, Kuwait University, P.O. Box 5969—Safat 13060—Kuwait

J. Sol. Energy Eng 127(3), 357-365 (Jul 20, 2005) (9 pages) doi:10.1115/1.1850487 History: Received July 09, 2004; Revised August 03, 2004; Online July 20, 2005
Copyright © 2005 by ASME
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References

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Figures

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Single sphere energy storage system. Thermocouples number (1), (7), and (10) are located at radial positions equal to the inner sphere radius and at angular locations of −90 deg, 0 deg, and 90 deg.
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Variation in the transient temperature profile inside the PCM for an inlet air velocity of 10 m/s, inlet air temperature of 60°C, and a sphere diameter of 3 cm
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Transient of temperature profile along the sphere axis for a sphere diameter of 3 cm, air velocity of 10 m/s, and air temperature of 60°C during energy storage and air temperature of 23°C during energy release
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Temperature profile inside the sphere during various modes of melting for air velocity of 2 m/s, inlet air temperature of 120°C, and a sphere diameter of 2 cm
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Effect of the HTF temperature on temperature transients at thermocouple (1) during melting and solidification for a sphere diameter of 2 cm and air velocity of 10 m/s
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Effect of the sphere diameter on the temperature transients at thermocouple (1) during melting and solidification for HTF temperature of 90°C and velocity of 10 m/s
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Effect of the air velocity on the temperature transients at thermocouple (1) during melting and solidification
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Variation in the measured specific melting time as a function of the sphere diameter, air temperature, and air velocity
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Variation in the measured specific solidification time as a function of the sphere diameter, air temperature, and air velocity
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Variation in the melting Nusselt number as a function air temperature, air velocity, and sphere diameter. Each data set includes four air velocities.
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Variation in the solidification Nusselt number as a function air temperature, air velocity, and sphere diameter. Each data set includes four air velocities.
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Variation in the melting Fourier number as a function air temperature, air velocity, and sphere diameter. Each data set includes four air velocities.
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Variation in the solidification Fourier number as a function air temperature, air velocity, and sphere diameter. Each data set includes four air velocities.

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