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dc.contributor.authorChen, C. A.en_US
dc.contributor.authorLi, K. W.en_US
dc.contributor.authorLie, Y. M.en_US
dc.contributor.authorLin, T. F.en_US
dc.date.accessioned2014-12-08T15:26:02Z-
dc.date.available2014-12-08T15:26:02Z-
dc.date.issued2011-11-01en_US
dc.identifier.issn0017-9310en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.ijheatmasstransfer.2011.07.012en_US
dc.identifier.urihttp://hdl.handle.net/11536/18452-
dc.description.abstractExperiments are conducted here to investigate how the channel size affects the R-410A saturated flow boiling heat transfer and associated bubble characteristics in a horizontal narrow annular duct. The gap of the duct is fixed at 1.0 and 2.0 mm in this study. The measured data indicate that the saturated flow boiling heat transfer coefficient increases with increasing refrigerant mass flux and saturated temperature and with a decrease in the gap size. Besides, raising the imposed heat flux can cause a significant increase in the boiling heat transfer coefficient. The results from the flow visualization show that the mean diameter of the bubbles departing from the heating surface decreases slightly with increasing refrigerant mass flux and saturated temperature. Moreover, the bubble departure frequency increases at reducing duct size and increasing mass flux. And at a high imposed heat flux many bubbles generated from the cavities in the heating surface tend to merge together to form big bubbles. Meanwhile, comparisons of the present heat transfer data for R-410A with R-407C and R-134a in the same duct and with some existing correlations are conducted. Furthermore, an empirical correlation for the present R-410A saturated flow boiling heat transfer data is proposed. (C) 2011 Elsevier Ltd. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectSaturated flow boiling heat transferen_US
dc.subjectR-410Aen_US
dc.subjectBubble characteristicsen_US
dc.subjectMini-channelen_US
dc.titleSaturated flow boiling heat transfer of R-410A and associated bubble characteristics in a narrow annular ducten_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.ijheatmasstransfer.2011.07.012en_US
dc.identifier.journalINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFERen_US
dc.citation.volume54en_US
dc.citation.issue23-24en_US
dc.citation.spage4988en_US
dc.citation.epage5000en_US
dc.contributor.department機械工程學系zh_TW
dc.contributor.departmentDepartment of Mechanical Engineeringen_US
dc.identifier.wosnumberWOS:000295115900023-
dc.citation.woscount1-
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