Flow condensation heat transfer enhancement in a mini-channel with hydrophobic and hydrophilic patterns

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dc.contributor.author Derby, Melanie M.
dc.contributor.author Chatterjee, Abhra
dc.contributor.author Peles, Yoav
dc.contributor.author Jensen, Michael K.
dc.date.accessioned 2013-12-04T22:20:55Z
dc.date.available 2013-12-04T22:20:55Z
dc.date.issued 2014-01-01
dc.identifier.uri http://hdl.handle.net/2097/16950
dc.description.abstract The study examined the enhancement of flow condensation of steam on hydrophobic and hydrophilic surfaces. Six 1.06 mm mini-gaps were tested at pressures of 350kPa to 400kPa, average qualities of 0.2 to 0.95 and mass fluxes of 50 to 200 kg/m²s. The surfaces included hydrophilic copper, hydrophobic Teflon AF™, and four surfaces with combined Teflon and hydrophilic patterns; pattern selection was guided by an analytical model. Condensing heat transfer coefficients on hydrophobic and hydrophobic/hydrophilic patterned surfaces reached a value of up to 425,000 W/m²K, surpassing the hydrophilic surface by an order of magnitude. Enhancement factors of 3.2 to 13.4 times that of the hydrophilic channel were found in the hydrophobic channel; combined with a lack of dependence on mass flux or quality, the data strongly suggested that dropwise condensation was promoted and sustained throughout the flow condensation process on hydrophobic and patterned surfaces. For the hydrophilic copper minigap, heat transfer coefficients were a strong function of quality, as well as a function of mass flux at higher qualities, which demonstrated the development and growth of a liquid film as quality decreased, and were well predicted by the Kim et al. (2013) correlation, with a mean average error of 8.9%. en_US
dc.language.iso en_US en_US
dc.relation.uri http://doi.org/10.1016/j.ijheatmasstransfer.2013.09.024 en_US
dc.rights This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
dc.rights.uri https://rightsstatements.org/page/InC/1.0/?language=en
dc.subject Condensation en_US
dc.subject Hydrophobic en_US
dc.subject Hydrophilic en_US
dc.subject Pattern en_US
dc.subject Minichannel en_US
dc.subject Microchannel en_US
dc.title Flow condensation heat transfer enhancement in a mini-channel with hydrophobic and hydrophilic patterns en_US
dc.type Article (author version) en_US
dc.date.published 2014 en_US
dc.citation.doi 10.1016/j.ijheatmasstransfer.2013.09.024 en_US
dc.citation.epage 160 en_US
dc.citation.jtitle International Journal of Heat and Mass Transfer en_US
dc.citation.spage 151 en_US
dc.citation.volume 68 en_US
dc.contributor.authoreid derbym en_US


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This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). Except where otherwise noted, the use of this item is bound by the following: This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

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