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Technical Briefs

Fast Thermal Cycling of Acetanilide as a Storage Material for Solar Energy Applications

[+] Author and Article Information
A. A. El-Sebaii

Department of Physics,
Faculty of Science,
Tanta University,
Tanta, Egypt
e-mail: ahmedelsebaii@yahoo.com

F. Al-Agel

Department of Physics,
Faculty of Science,
King Abdulaziz University,
P.O. Box 80203, Jeddah 21589, Saudi Arabia
e-mail: Fagel2@hotmail.com

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received April 16, 2012; final manuscript received September 18, 2012; published online October 24, 2012. Assoc. Editor: Rainer Tamme.

J. Sol. Energy Eng 135(2), 024502 (Oct 24, 2012) (3 pages) Paper No: SOL-12-1104; doi: 10.1115/1.4007710 History: Received April 16, 2012; Revised September 18, 2012

The melting temperature of acetanilide C8H9NO equals 116 °C which lies in the range of solar cooking (boiling cooking) of most kinds of food. Acetanilide was used in previous studies as a storage medium integrated within box type solar cookers. However, detailed studies of melting and/or solidification behavior of acetanilide were not reported. Therefore, the main aim of this work was to study the effect of fast thermal melting/solidification cycling of commercial grade acetanilide on its melting point and latent heat of fusion. One thousand thermal cycles had been performed and the thermophysical properties of acetanilide were measured using the differential scanning calorimetric technique. It was indicated that acetanilide solidifies with ∼15 °C of supercooling; consequently, it is recommended to overcome the supercooling problem before using acetanilide as a thermal storage material for solar energy applications.

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References

Figures

Grahic Jump Location
Fig. 1

Temperature versus time for 25 successive melting/freezing cycles of acetanilide using the constructed setup

Grahic Jump Location
Fig. 2

Temperature–time graph of acetanilide after various numbers of cycles

Grahic Jump Location
Fig. 3

DSC measurement curves used for measurements of onset and peak temperatures as well as the latent heat of fusion of acetanilide after various number of cycles

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