Pressure drop characteristics of R134a during flow boiling in a single rectangular micro-channel

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Author listKeepaiboon C., Thiangtham P., Mahian O., Dalkili็ A.S., Wongwises S.

PublisherElsevier

Publication year2016

JournalInternational Communications in Heat and Mass Transfer (0735-1933)

Volume number71

Start page245

End page253

Number of pages9

ISSN0735-1933

eISSN1879-0178

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84958231789&doi=10.1016%2fj.icheatmasstransfer.2015.12.013&partnerID=40&md5=0bca7d1ba9faf21afb8f3b7cf18d6006

LanguagesEnglish-Great Britain (EN-GB)


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Abstract

The pressure-drop characteristics during flow boiling in a single rectangular micro-channel with hydraulic diameter of 0.68 mm are presented. In the present study, pressure drop was studied at heat flux range of 7.63-49.46 kW/m2, mass flux range of 600-1400 kg/m2 s, and saturation temperature of 23, 27 and 31 ฐC. Experimental results indicated that the total pressure was dominated by frictional pressure drop. The increase of mass flux also increased the frictional pressure gradient, whereas the increase of saturation temperature reduced the frictional pressure gradient. In addition, heat flux also had an insignificant effect on the frictional the pressure gradient. A new correlation was also proposed for effective design of micro-channel heat exchanger. ฉ 2015 Elsevier Ltd.


Keywords

Flow boiling


Last updated on 2023-26-09 at 07:36