Abstract
An experimental investigation was performed with R22 and R410a for single-phase flow, evaporation and condensation inside five micro-fin tubes of various geometries to obtain pressure drop and heat transfer characteristics. The results suggest single-phase flow heat transfer coefficients are increased by 46% to 64% compared with smooth tubes values. Tube geometries that had higher evaporation heat transfer coefficients or higher condensation heat transfer coefficients were identified. Condensation pressure drop characteristics also varied with tube geometry. Based on experiment data, a new correlation which contains the characteristics of a liquid film in annular flow is established. The new correlation can predict the experimental data within an error band of 15% and, for 77% of the data from the literature, within an error band of 30%. The Choi et al. correlation can predict the present condensation pressure drop data within a 20% error band and the Yu and
| Original language | English (US) |
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| Title of host publication | ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2015, collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems |
| Publisher | American Society of Mechanical Engineers |
| ISBN (Electronic) | 9780791856871 |
| DOIs | |
| State | Published - 2015 |
| Event | ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2015, collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems - San Francisco, United States Duration: Jul 6 2015 → Jul 9 2015 |
Publication series
| Name | ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2015, collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems |
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Other
| Other | ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2015, collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems |
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| Country/Territory | United States |
| City | San Francisco |
| Period | 7/6/15 → 7/9/15 |
Bibliographical note
Funding Information:This work is supported by the National Science Foundation of Zhejiang Province, China (Z13E060001), the National Natural Science Foundation of China (51210011), the National Key Technology R&D Program (2012BAA10B01). We would like to dedicate the paper to commemorate Dr. Ralph L. Webb for his outstanding contributions to heat transfer. Wei Li obtained his Ph.D. with Dr Webb at Penn State in 1998.
Publisher Copyright:
Copyright © 2015 by ASME.