Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas
Condensation heat transfer outside horizontal plain and finned tubes with different surface wettability is experimentally studied. The methods of self-assembled monolayer coatings of n-octadecyl mercaptan with oxidation and etching treatments are employed to create the hydrophobic surfaces or superh...
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Veröffentlicht in: | International journal of heat and mass transfer 2015-06, Vol.85, p.513-523 |
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description | Condensation heat transfer outside horizontal plain and finned tubes with different surface wettability is experimentally studied. The methods of self-assembled monolayer coatings of n-octadecyl mercaptan with oxidation and etching treatments are employed to create the hydrophobic surfaces or superhydrophobic surfaces with nanostructures. The hydrophilic–hydrophobic (HH) hybrid and the hydrophilic–superhydrophobic (HS) hybrid surfaces based on the finned tubes are fabricated as well. The experimental results show that the HS hybrid finned tube achieves the highest condensation heat transfer performance in the presence of a large amount of noncondensable gas while it does not exhibit superior performance for the pure vapor condensation. The fraction of water vapor in the nitrogen–vapor mixture has significant influence on the condensation heat transfer coefficient. The dropwise condensation transforms gradually to the film condensation on both the superhydrophobic and the HS hybrid finned tubes with the increase of water vapor fraction. |
doi_str_mv | 10.1016/j.ijheatmasstransfer.2015.02.006 |
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The methods of self-assembled monolayer coatings of n-octadecyl mercaptan with oxidation and etching treatments are employed to create the hydrophobic surfaces or superhydrophobic surfaces with nanostructures. The hydrophilic–hydrophobic (HH) hybrid and the hydrophilic–superhydrophobic (HS) hybrid surfaces based on the finned tubes are fabricated as well. The experimental results show that the HS hybrid finned tube achieves the highest condensation heat transfer performance in the presence of a large amount of noncondensable gas while it does not exhibit superior performance for the pure vapor condensation. The fraction of water vapor in the nitrogen–vapor mixture has significant influence on the condensation heat transfer coefficient. The dropwise condensation transforms gradually to the film condensation on both the superhydrophobic and the HS hybrid finned tubes with the increase of water vapor fraction.</description><identifier>ISSN: 0017-9310</identifier><identifier>EISSN: 1879-2189</identifier><identifier>DOI: 10.1016/j.ijheatmasstransfer.2015.02.006</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Condensation heat transfer ; Condensing ; Dropwise condensation ; Experiment ; Finned tube ; Heat transfer ; Heat transfer coefficients ; Mass transfer ; Mercaptans ; Noncondensable gas ; Tubes ; Water vapor ; Wettability</subject><ispartof>International journal of heat and mass transfer, 2015-06, Vol.85, p.513-523</ispartof><rights>2015 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c375t-4fc144916f312e92279d471ab60356456c169ce3b9d5a4d66ebe912d555112f73</citedby><cites>FETCH-LOGICAL-c375t-4fc144916f312e92279d471ab60356456c169ce3b9d5a4d66ebe912d555112f73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.02.006$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Hu, H.W.</creatorcontrib><creatorcontrib>Tang, G.H.</creatorcontrib><creatorcontrib>Niu, D.</creatorcontrib><title>Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas</title><title>International journal of heat and mass transfer</title><description>Condensation heat transfer outside horizontal plain and finned tubes with different surface wettability is experimentally studied. The methods of self-assembled monolayer coatings of n-octadecyl mercaptan with oxidation and etching treatments are employed to create the hydrophobic surfaces or superhydrophobic surfaces with nanostructures. The hydrophilic–hydrophobic (HH) hybrid and the hydrophilic–superhydrophobic (HS) hybrid surfaces based on the finned tubes are fabricated as well. The experimental results show that the HS hybrid finned tube achieves the highest condensation heat transfer performance in the presence of a large amount of noncondensable gas while it does not exhibit superior performance for the pure vapor condensation. The fraction of water vapor in the nitrogen–vapor mixture has significant influence on the condensation heat transfer coefficient. The dropwise condensation transforms gradually to the film condensation on both the superhydrophobic and the HS hybrid finned tubes with the increase of water vapor fraction.</description><subject>Condensation heat transfer</subject><subject>Condensing</subject><subject>Dropwise condensation</subject><subject>Experiment</subject><subject>Finned tube</subject><subject>Heat transfer</subject><subject>Heat transfer coefficients</subject><subject>Mass transfer</subject><subject>Mercaptans</subject><subject>Noncondensable gas</subject><subject>Tubes</subject><subject>Water vapor</subject><subject>Wettability</subject><issn>0017-9310</issn><issn>1879-2189</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkLFu2zAQhomgAeImeQeOWaTyKJEytxSG27QIkCWdCYo82TRk0iHppF775JHgZurS6fDfHb7DfYTcAauBgfyyq_1ui6bsTc4lmZAHTDVnIGrGa8bkBVnAslMVh6X6RBaMQVepBtgV-Zzzbo6slQvyZ_37gMnvMRQzUh9eMRe_McXHQONAbQwOQz7n-Rz9uEXnxqlP3tE3LMX0fvTlRAcfAjpajj3SN1-2dDRpg9Ts4zGUmRhi-ID2I9KNyTfkcjBjxtu_9Zr8-rZ-Xj1Uj0_ff6y-Pla26USp2sFC2yqQQwMcFeedcm0HppesEbIV0oJUFpteOWFaJyX2qIA7IQQAH7rmmtyduYcUX47Tn3rvs8VxNAHjMWvoJlWtEIxNq_fnVZtizgkHfZgcmXTSwPSsX-_0v_r1rF8zrif9E-LnGYHTS69-mmbrMVh0PqEt2kX__7B38fSeAw</recordid><startdate>20150601</startdate><enddate>20150601</enddate><creator>Hu, H.W.</creator><creator>Tang, G.H.</creator><creator>Niu, D.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20150601</creationdate><title>Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas</title><author>Hu, H.W. ; Tang, G.H. ; Niu, D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c375t-4fc144916f312e92279d471ab60356456c169ce3b9d5a4d66ebe912d555112f73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Condensation heat transfer</topic><topic>Condensing</topic><topic>Dropwise condensation</topic><topic>Experiment</topic><topic>Finned tube</topic><topic>Heat transfer</topic><topic>Heat transfer coefficients</topic><topic>Mass transfer</topic><topic>Mercaptans</topic><topic>Noncondensable gas</topic><topic>Tubes</topic><topic>Water vapor</topic><topic>Wettability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hu, H.W.</creatorcontrib><creatorcontrib>Tang, G.H.</creatorcontrib><creatorcontrib>Niu, D.</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>International journal of heat and mass transfer</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hu, H.W.</au><au>Tang, G.H.</au><au>Niu, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas</atitle><jtitle>International journal of heat and mass transfer</jtitle><date>2015-06-01</date><risdate>2015</risdate><volume>85</volume><spage>513</spage><epage>523</epage><pages>513-523</pages><issn>0017-9310</issn><eissn>1879-2189</eissn><abstract>Condensation heat transfer outside horizontal plain and finned tubes with different surface wettability is experimentally studied. The methods of self-assembled monolayer coatings of n-octadecyl mercaptan with oxidation and etching treatments are employed to create the hydrophobic surfaces or superhydrophobic surfaces with nanostructures. The hydrophilic–hydrophobic (HH) hybrid and the hydrophilic–superhydrophobic (HS) hybrid surfaces based on the finned tubes are fabricated as well. The experimental results show that the HS hybrid finned tube achieves the highest condensation heat transfer performance in the presence of a large amount of noncondensable gas while it does not exhibit superior performance for the pure vapor condensation. The fraction of water vapor in the nitrogen–vapor mixture has significant influence on the condensation heat transfer coefficient. The dropwise condensation transforms gradually to the film condensation on both the superhydrophobic and the HS hybrid finned tubes with the increase of water vapor fraction.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.ijheatmasstransfer.2015.02.006</doi><tpages>11</tpages></addata></record> |
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subjects | Condensation heat transfer Condensing Dropwise condensation Experiment Finned tube Heat transfer Heat transfer coefficients Mass transfer Mercaptans Noncondensable gas Tubes Water vapor Wettability |
title | Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas |
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