This study numerically explores the effect of presence of micro-encapsulated phase change material (MEPCM) on the heat transfer characteristics of a fluid in a rectangular cavity driven by natural convection. The natural convection is generated by the temperature difference between two vertical walls at constant temperatures. The phase change material (PCM) melts in the vicinity of the hot wall and solidifies near the cold wall. Unlike the pure fluids, the heat transfer characteristics of MEPCM slurry cannot be simply presented in terms of corresponding dimensionless controlling parameters such as Rayleigh number. In the presence of phase change particles, the controlling parameters’ values change significantly due to the local phase change. The numerical results show significant increase in the heat transfer coefficient (up to 80%) at the considered operating conditions. This increase is a result of the MEPCM latent heat and the increased volumetric thermal expansion coefficient due to MEPCM volume change during melting.
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Natural And Mixed Convection
Natural Convection With Micro-Encapsulated Phase Change Material
R. Sabbah,
R. Sabbah
Mechanical, Materials, and Aerospace Engineering Department,
e-mail: sabbram@iit.edu
Illinois Institute of Technology
, Chicago, IL
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J. Seyed-Yagoobi,
J. Seyed-Yagoobi
Mechanical, Materials, and Aerospace Engineering Department,
e-mail: yagoobi@iit.edu
Illinois Institute of Technology
, Chicago, IL
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S. Al-Hallaj
S. Al-Hallaj
Department of Chemical Engineering,
e-mail: sah@uic.edu
University of Illinois at Chicago
, Chicago, IL
Search for other works by this author on:
R. Sabbah
Mechanical, Materials, and Aerospace Engineering Department,
Illinois Institute of Technology
, Chicago, IL
e-mail: sabbram@iit.edu
J. Seyed-Yagoobi
Mechanical, Materials, and Aerospace Engineering Department,
Illinois Institute of Technology
, Chicago, IL
e-mail: yagoobi@iit.edu
S. Al-Hallaj
Department of Chemical Engineering,
University of Illinois at Chicago
, Chicago, IL
e-mail: sah@uic.edu
J. Heat Transfer. Aug 2012, 134(8): 082503 (8 pages)
Published Online: June 8, 2012
Article history
Received:
June 19, 2011
Revised:
January 12, 2012
Online:
June 8, 2012
Published:
June 8, 2012
Citation
Sabbah, R., Seyed-Yagoobi, J., and Al-Hallaj, S. (June 8, 2012). "Natural Convection With Micro-Encapsulated Phase Change Material." ASME. J. Heat Transfer. August 2012; 134(8): 082503. https://doi.org/10.1115/1.4006158
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