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Technical Brief

Development of a Durable Vapor Phase Deposited Superhydrophobic Coating for Steam Cycle Power Generation Condenser Tubes

[+] Author and Article Information
Christopher M. Duron

Department of Mechanical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: duroncm@auburn.edu

Jie Zhong

Department of Chemical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: jzz0009@auburn.edu

Allan E. David

Department of Chemical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: aedavid@auburn.edu

William R. Ashurst

Department of Chemical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: ashurwr@auburn.edu

Sushil H. Bhavnani

Department of Mechanical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: bhavnsh@auburn.edu

Jacob R. Morris

Department of Mechanical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: jzm0023@auburn.edu

Andrew C. Bates

Department of Mechanical Engineering,
Auburn University,
Auburn, AL 36849
e-mail: acb0048@auburn.edu

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received July 4, 2017; final manuscript received February 6, 2018; published online May 21, 2018. Assoc. Editor: Mohamed S. El-Genk.

J. Thermal Sci. Eng. Appl 10(5), 054501 (May 21, 2018) (4 pages) Paper No: TSEA-17-1230; doi: 10.1115/1.4039783 History: Received July 04, 2017; Revised February 06, 2018

Condenser performance benefits afforded by dropwise condensation have long been unattainable in steam cycle power plant condensers due to the unavailability of durable and long-lasting hydrophobic surface treatments. However, recent work in superhydrophobic coating technology shows promise that durable coatings, appropriate for use on condenser tubes in steam cycle power generation systems, may soon become a reality. This work presents a nanoscale, vapor phase deposited superhydrophobic coating with improved durability comprised of several layers of rough alumina nanoparticles and catalyzed silica with a finishing layer of perfluorinated silane. This coating was applied to solid, hemicylindrical test surfaces fabricated from several common condenser tube materials used in power generation system condensers: Titanium, Admiralty brass, Cupronickel, and Sea Cure stainless steel as well as 304 stainless steel stock. The development evolution of the coating and its effect on condensation behavior on the above materials are presented. Results show that the performance enhancement, measured in rate of heat transfer spikes corresponding to condensate roll-off events, was best for the titanium surface, which produced 64% more events than the next most active material when coated using the most durable surface treatment tested in this work.

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References

Verho, T. , Bower, C. , Andrew, P. , Franssila, S. , Ikkala, O. , and Ras, R. H. A. , 2010, “Mechanically Durable Superhydrophobic Surfaces,” Adv. Mater., 23(5), pp. 673–678. [CrossRef] [PubMed]
Carey, V. P. , 2008, Liquid-Vapor Phase Change Phenomena, 2nd ed., Taylor & Francis Group, New York, pp. 418–419.
Boreyko, J. B. , and Chen, C. H. , 2009, “Self-Propelled Dropwise Condensate on Superhydrophobic Surfaces,” Phys. Rev. Lett., 103(18), p. 184501. [CrossRef] [PubMed]
Manvel, J. T., Jr. , 1979, “An Experimental Study of Dropwise Condensation on Horizontal Condenser Tubes,” Master's thesis, Naval Postgraduate School, Monterey, CA. https://calhoun.nps.edu/handle/10945/18721
Das, A. K. , Kilty, H. P. , Marto, P. J. , Andeen, G. B. , and Kumar, A. , 2000, “The Use of and Organic Self-Assembled Monolayer Coating to Promote Dropwise Condensation of Steam on Horizontal Tubes,” ASME J. Heat Transfer, 122(2), pp. 278–286. [CrossRef]
Chen, C. H. , Cai, Q. J. , Tsai, C. L. , Chen, C. L. , and Xiong, G. Y. , 2007, “Dropwise Condensation on Superhydrophobic Surfaces With Two-Tier Roughness,” Appl. Phys. Lett., 90(17), p. 173108. [CrossRef]
Liang, Z. , and Keblinski, P. , 2015, “Coalescence-Induced Jumping of Nanoscale Droplets on Super-Hydrophobic Surfaces,” Appl. Phys. Lett., 107(14), p. 143105. [CrossRef]
Zhang, K. , Liu, F. , Williams, A. J. , Qu, X. , Feng, J. J. , and Chen, C. H. , 2015, “Self-Propelled Droplet Removal From Hydrophobic Fiber-Based Coalescers,” Phys. Rev. Lett., 115(7), p. 074502. [CrossRef] [PubMed]
Qu, X. , Boreyko, J. B. , Liu, F. , Agapov, R. L. , Larvik, N. V. , Retterer, S. T. , Feng, J. J. , Collier, C. P. , and Chen, C. H. , 2015, “Self-Propelled Sweeping Removal of Dropwise Condensate,” Appl. Phys. Lett., 106(22), p. 221601. [CrossRef]
Miljkovic, N. , Enright, R. , Nam, Y. , Lopez, K. , Dou, N. , Sack, J. , and Wang, E. N. , 2012, “Jumping-Droplet-Enhanced Condensation on Scalable Superhydrophobic Nanostructured Surfaces,” Nano Lett., 13(1), pp. 179–187. [CrossRef] [PubMed]

Figures

Grahic Jump Location
Fig. 1

Average number of roll-off events for each modified Repellix and Repellix 2.0 coated tube material

Grahic Jump Location
Fig. 2

Heat transfer coefficient spikes on Repellix 2.0 coated titanium test surface. Arrows indicate heat transfer coefficient spike after roll-off event. Inset shows the surface before and after roll-off event.

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