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Evelyn N. Wang. Dou, Nicholas (Nicholas Gang) Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering 2012-10-30T17:03:25Z 2012-10-30T17:03:25Z 2012 2012 http://hdl.handle.net/1721.1/74515 813136288 Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012. Cataloged from PDF version of thesis. Includes bibliographical references (p. 33). Condensation is an important process in many power generation and water desalination technologies. Superhydrophobic nanostructured surfaces have unique condensation properties that may enhance heat transfer through a mechanism driven by surface tension. The increased droplet removal rate and reduced size of departing droplets facilitates improvements over traditional filmwise and dropwise condensation. This work investigates copper oxide nanostructures as a potential substrate for superhydrophobic condensation. We first explored and refined a procedure for creating and functionalizing oxide nanostructures on copper surfaces. The condensation behavior of these samples was characterized using an optical microscope and an environmental scanning electron microscope by quantifying the distribution of nucleation sites and droplet growth behavior. Using the knowledge gained from these studies, an experimental test bed was designed and fabricated to measure macro-scale condensation heat transfer for flat and tubular sample geometries. Preliminary results validate previous theoretical and experimental studies of filinwise condensation and demonstrate heat transfer enhancement with dropwise condensation. The copper oxide nanostructures exhibited jumping, which shows the effectiveness of the synthesis procedure. by Nicholas Dou. S.B. 33 p. eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Mechanical Engineering. Condensation on superhydrophobic copper oxide nanostructures Thesis application/pdf Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="7209f5d9-6872-429b-8edf-e194da330f7c"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Condensation on superhydrophobic copper oxide nanostructures</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2012</PublicationDate> <Authors> <Author> <DisplayName>Dou, Nicholas (Nicholas Gang)</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Mechanical Engineering.</Keyword> <Abstract>Condensation is an important process in many power generation and water desalination technologies. Superhydrophobic nanostructured surfaces have unique condensation properties that may enhance heat transfer through a mechanism driven by surface tension. The increased droplet removal rate and reduced size of departing droplets facilitates improvements over traditional filmwise and dropwise condensation. This work investigates copper oxide nanostructures as a potential substrate for superhydrophobic condensation. We first explored and refined a procedure for creating and functionalizing oxide nanostructures on copper surfaces. The condensation behavior of these samples was characterized using an optical microscope and an environmental scanning electron microscope by quantifying the distribution of nucleation sites and droplet growth behavior. Using the knowledge gained from these studies, an experimental test bed was designed and fabricated to measure macro-scale condensation heat transfer for flat and tubular sample geometries. Preliminary results validate previous theoretical and experimental studies of filinwise condensation and demonstrate heat transfer enhancement with dropwise condensation. The copper oxide nanostructures exhibited jumping, which shows the effectiveness of the synthesis procedure.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>