Systematic Testing of the Two-Phase Pressure-Drop Equations for Horizontal Dividing T-Junctions

Levac, M. L.-J.; Soliman, H.M.; Azzopardi, B.J.; Sims, G.E.

doi:10.1615/multscientechn.v14.i3.20

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“…Most of the previous works on the two-phase flow at dividing T-junctions were for larger than 25 mm in hydraulic diameter. (Reimann et al (1988), Azzopardi (1999), Levac et al (2002)) In the review article of Azzopardi (1999), possibility (of utilizing T-junction as a part of phase separation equipment) and problems (of mal-distributions in condensers or gas distribution systems), governing parameters, phenomena, prediction models and pressure drop are stated extensively and not going to be repeated here. On the other hand, the hydraulic diameter of the headers of compact heat exchangers ranges mostly below about 10 mm, and currently there are only a limited number of studies available for this size range, represented by Hong (1978), Stacey et al (2000) and Lee andLee (2001, 2004a), Das et al (2005), Wren et al (2005) and Tae and Cho (2006) as listed in Table 2.…”

Section: Two-phase Flow At Single T-junctionsmentioning

confidence: 99%

Flow Distribution Behavior in Condensers and Evaporators

Lee

2006

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In this article, flow distribution behavior of two-phase mixture at header-channel junctions, commonly found in evaporators and condensers, is reviewed systematically. The first part of this paper introduces flow configuration at single T-junctions that can be considered as unit elements of the header-channels assembly of heat exchangers. Experimental observations and appropriate models for prediction of flow split to the branch are introduced. Then the effect of the flow interaction between two neighboring channels (branches) on the flow split pattern is considered. In the latter part, to simulate practical shape of the header-channels assembly of compact heat exchangers, the test results with a partitioned header connected to multiple parallel channels are presented. Dependence of the flow distribution pattern on various operating conditions and headerchannels configurations are examined. Finally, practical techniques to achieve even distribution of two-phase flow from the header to the parallel channels are introduced and the future research issues are presented.In M T header (main tube) inlet main (header) at immediate upstream of each junction two-phase

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Section: Two-phase Flow At Single T-junctionsmentioning

confidence: 99%

Flow Distribution Behavior in Condensers and Evaporators

Lee

2006

Keynote Papers

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Systematic Testing of the Two-Phase Pressure-Drop Equations for Horizontal Dividing T-Junctions

Cited by 1 publication

References 0 publications

Flow Distribution Behavior in Condensers and Evaporators

Flow Distribution Behavior in Condensers and Evaporators

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