Abstract
The electrohydrodynamics (EHD) enhancement of convection heat transfer of water in a jacket tube heat exchanger was studied through an experimental method in this paper. In the experiment, a DC high voltage electrode was set in the central tube-side of the heat exchanger, and the high voltage electrode in the tube-side was adjustable in the range of 0–40 kV. Five different combinations of heat transfer enhancement experiments were conducted under the different voltage and rate of flow. The results indicate that the maximal enhancement coefficient θ is 1.224 when the flow rate of tube-side inlet is 0.1 m3/h. It is proved that, for the work medium of water, the convective heat transfer can be enhanced by applying high electric field. The performance of EHD-enhanced is sensitive to the variation of flow rate, and in the same flow rate, there exist an optimized voltage in the EHD-enhanced process rather than the monotonic positive-correlation relationship.
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Foundation item: Supported by the National Natural Science Foundation of China (51006076, 50906065), and the Program for Excellent Young and Middle-Aged Researchers in Hubei Province (Q20081508)
Biography: YANG Xia, male, Ph. D., Associate professor, research direction: fluid mechanics and heat transfer enhancement technology.
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Yang, X., Zhang, J., Wu, Y. et al. Experimental study on convective heat transfer in tube-side of water jacket-tube heat exchanger by electrohydrodynamics effect. Wuhan Univ. J. Nat. Sci. 16, 49–54 (2011). https://doi.org/10.1007/s11859-011-0710-6
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DOI: https://doi.org/10.1007/s11859-011-0710-6
Key words
- electrohydrodynamics (EHD)
- heat transfer enhancement
- water jacket-tube heat exchanger
- convection heat transfer