Mini-channel flow condensation enhancement through hydrophobicity in the presence of noncondensable gas

dc.citationChen, X., Morrow, J. A., & Derby, M. M. (2017). Mini-channel flow condensation enhancement through hydrophobicity in the presence of noncondensable gas. International Journal of Heat and Mass Transfer, 115, 11–18. https://doi.org/10.1016/j.ijheatmasstransfer.2017.07.029
dc.citation.doi10.1016/j.ijheatmasstransfer.2017.07.029
dc.citation.issn0017-9310
dc.citation.jtitleInternational Journal of Heat and Mass Transfer
dc.citation.volume115
dc.contributor.authorChen, Xi
dc.contributor.authorMorrow, Jordan A.
dc.contributor.authorDerby, Melanie M.
dc.date.accessioned2019-03-01T23:30:44Z
dc.date.available2019-03-01T23:30:44Z
dc.date.issued2017-12-01
dc.date.published2017
dc.descriptionCitation: Chen, X., Morrow, J. A., & Derby, M. M. (2017). Mini-channel flow condensation enhancement through hydrophobicity in the presence of noncondensable gas. International Journal of Heat and Mass Transfer, 115, 11–18. https://doi.org/10.1016/j.ijheatmasstransfer.2017.07.029
dc.description.abstractSteam condensation is important for a broad range of industrial applications, including power generation and nuclear containment systems. The presence of noncondensable gases in these systems significantly reduces heat transfer, prompting the need for condensation heat transfer enhancement. Steam was condensed in the presence of nitrogen in hydrophilic and hydrophobic 1.82-mm rectangular mini-channels for a range of experimental conditions: steam mass flux (i.e., 35–75kg/m2s), steam quality (i.e., 0.3<x<0.9), and nitrogen mass fraction (i.e., 0–30%). In the hydrophilic channel, nitrogen mass fractions of 10–30% reduced condensation heat transfer coefficients by 24–55%. Experimental results were well predicted by the Caruso et al. (2013) correlation. Dropwise condensation was observed in the hydrophobic channel, although the addition of nitrogen suppressed nucleation. In the hydrophobic channel, heat transfer was enhanced by 34–205% over the hydrophilic channel in presence of 10–30% nitrogen, particularly at low vapor mass fractions. Heat transfer coefficients in the hydrophobic channel with 30% nitrogen were identical or higher than those of pure steam in the hydrophilic channel at the same mass flux and quality. Heat transfer coefficients strongly depended on vapor mass fraction, defined as the vapor mass flow rate divided by the three-phase (vapor, liquid and nitrogen) mass flow rate.
dc.description.embargo2019-07-05
dc.description.versionArticle: Accepted Manuscript (AM)
dc.identifier.urihttp://hdl.handle.net/2097/39439
dc.language.isoen_US
dc.relation.urihttps://doi.org/10.1016/j.ijheatmasstransfer.2017.07.029
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.urihttps://www.elsevier.com/about/policies/sharing
dc.subjectFlow condensation
dc.subjectNoncondensable gas
dc.subjectMinichannel
dc.subjectWettability
dc.titleMini-channel flow condensation enhancement through hydrophobicity in the presence of noncondensable gas
dc.typeText

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