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Research Papers

Generalized Two-Phase Pressure Drop and Heat Transfer Correlations in Evaporative Micro/Minichannels

[+] Author and Article Information
Hee Joon Lee

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

Dong Yao Liu

College of Power Engineering, Nanjing University of Science and Technology, Jiangsu 210094, P. R. China

Y. Alyousef

 KACST Energy Research Institute, Riyadh 11442, Saudi Arabia

Shi-chune Yao

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213scyao@cmu.edu

J. Heat Transfer 132(4), 041004 (Feb 18, 2010) (9 pages) doi:10.1115/1.4000861 History: Received January 31, 2008; Revised February 19, 2009; Published February 18, 2010; Online February 18, 2010

Existing databases and correlations in literature on the microchannel pressure drop and heat transfer are reviewed in this paper. From this review, it is found that none of the existing correlations can cover the wide ranges of working fluids, operational conditions, and different microchannel dimensions. In addition, the importance of the Bond number, which relates the nominal bubble dimension or capillary parameter with the channel size, is revealed in this paper. Using the Bond number, improved correlations of pressure drop and heat transfer are established, which predict the existing data well over a wide range of channel sizes, fluids, and operational conditions.

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Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Chisholm parameter versus Bond number

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Figure 2

Chisholm parameter versus exit quality

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Figure 3

The prediction of the correlation of Kandlikar compared with the experimental data in micro/minichannels with average % errors shown in legend

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Figure 4

The prediction of the correlation of Thome compared with the experimental data of refrigerants in micro/minichannels with average % errors shown in legend

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Figure 5

The prediction of the correlation of Thome compared with the experimental data of water in a microchannel and ammonia in a macrochannel with average % errors shown in legend

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Figure 6

The prediction of the correlation of Lee and Mudawar compared with the water data of Steinke and Kandlikar

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Figure 7

The correlation of Thome compared with data of a different Bond number

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Figure 8

The correlation of Lee and Mudawar compared with data of a different Bond number with average % errors shown in legend

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Figure 9

The modified correlation of Lee and Mudawar with the present correlation factor compared with data of a different Bond number with average % errors shown in legend

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Figure 10

The prediction of the new improved correlation compared with the experimental data of refrigerants in micro/minichannels

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