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Technical Briefs

Heat Transfer Characteristics of Liquid Flow With Micro-Encapsulated Phase Change Material: Experimental Study

[+] Author and Article Information
R. Sabbah, J. Seyed-Yagoobi, S. Al-Hallaj

Mechanical, Materials, and Aerospace Engineering Department,  Illinois Institute of Technology, Chicago, IL 60616sabbram@iit.eduDepartment of Chemical Engineering,  University of Illinois at Chicago, Chicago, IL 60607sabbram@iit.edu

J. Heat Transfer 134(4), 044501 (Feb 13, 2012) (3 pages) doi:10.1115/1.4005311 History: Received July 01, 2010; Revised June 13, 2011; Published February 13, 2012; Online February 13, 2012

This experimental study investigates the heat transfer characteristics of a liquid flow with micro-encapsulated phase change material (MEPCM). The MEPCM mass concentration is varied between 0 and 20 percent with average particle diameter of 10 μm. Tube wall temperature profile, fluid inlet and outlet temperatures are measured and the corresponding heat transfer coefficient is determined for various operating conditions. A wide range of the controlling parameters, MEPCM concentration, heat flux, inlet temperature, and flow rate are covered. The results showed significant enhancements in heat transfer coefficient (higher than 50%) and reduction in tube wall temperature (higher than 40%). The results also showed that the heat transfer enhancement curve showed resemblance to the MEPCM specific heat curve.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

MEPCM specific heat derived from the DSC test

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Figure 2

Dimensionless wall temperature vs. tube length, φ = 0%, 1%, 5%, 10%, 20%, V· = 75 ml/min, Tin  = 24 °C, q" = 2920 W/m2

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Figure 3

Heat transfer coefficient versus tube length, φ = 0%, 1%, 5%, 10%, 20%, V· = 75 ml/min, Tin  = 24 °C, q" = 2920 W/m2

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Figure 7

Average heat transfer coefficient enhancement versus heat flux, V· = 75 ml/min, φ = 10%, Tin  = 24 °C

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Figure 6

Average heat transfer coefficient enhancement versus MEPCM slurry flow rate, Tin  = 24 °C, q" = 2920 W/m2 , φ = 5%

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Figure 5

Average heat transfer coefficient enhancement versus MEPCM slurry inlet temperature, φ = 20%, V· = 100 ml/min, q" = 3285 W/m2

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Figure 4

Average heat transfer coefficient enhancement versus MEPCM concentration, V· = 75 ml/min, q" = 730, 1460, 2190, 2920 W/m2 , Tin  = 24 °C

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