Experimental investigation on the flow boiling of R134a in a multi-microchannel heat sink

Dalkılıç, Ahmet Selim; Özman, Cansu; Sakamatapan, Kittipong

doi:10.1016/j.icheatmasstransfer.2017.12.008

Cited by 31 publications

(8 citation statements)

References 38 publications

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“…The findings regarding the relation between heat transfer coefficient and mass flux was same, with the exception of Dalkılıç et al [144]'s findings,: the heat transfer coefficient increased with increasing mass flux. Candan et al [138] and Morcos et al [155] have reached these results with channels while Akhavan-Behabadi et al [131], Özdemir [145], Kundu et al [152], and Kundu et al [153] have obtained these results with tubes.…”

Section: Mass Fluxmentioning

confidence: 67%

“…Celen et al [101], Dalkılıç et al [144], observed that the heat transfer coefficient has increased at all saturation temperatures. This situation was expected.…”

Section: Saturation Temperaturementioning

confidence: 94%

“…And this situation shows us whether it is a channel or tube do not change the tendency that increasing mass flux results in increasing heat transfer coefficient. Dalkılıç et al [144] found that mass flux did not affect the transfer coefficient at low vapour quality. However, Dalkılıç et al have increased the heat flux and found that the heat transfer has increased with increasing mass flux until dryout point.…”

Section: Mass Fluxmentioning

confidence: 97%

“…Özdemir [145] deduced that high heat removal could be enabled at high flow rates for subcooled boiling situations. Dalkılıç et al [144] found that the heat transfer coefficient notably went up with increment in heat flux at low vapour quality. Passos et al [143] found that for tubes having an outside diameter of 7 mm, the heat transfer coefficient for the micro-fin tubes was calculated as greater (100 %) than for the plain tubes.…”

Section: Subcooled Boilingmentioning

confidence: 99%

“…Dalkılıç et al [144] conducted practical research on the flow boiling of R134 in a microchannel heat sink. They employed rectangular micro-channels as heat sinks.…”

Section: Subcooled Boilingmentioning

confidence: 99%

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Comprehensive Review on the Flow Characteristics of Two-Phase Flows in Inclined Tubes

Karademir¹,

Ozcelik²,

Açıkgöz³

et al. 2021

Journal of Thermal Engineering

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This paper presents a comprehensive review of research works on condensation and boiling heat transfer characteristics in horizontal, vertical and inclined tubes both smooth and enhanced. Although there are many studies examining two-phase flows inside tubes, it is almost impossible to find such a comprehensive study for two-phase flow in tubes. Moreover, while number of the studies concerning condensation or boiling inside tubes are limited, the present study covers almost all studies of condensation and boiling inside inclined tubes. Previous studies are classified into many subtitles according to configuration (horizontal, vertical or inclined) and roughness (smooth or enhanced) as well as aim of the study (researching the effect of parameters on the heat transfer coefficient, pressure drop or evaluation of prediction correlation). Such a wide range of classification and scope have no done before. Condensation and boiling phenomena are of great importance in heat exchangers, cooling systems, etc. due to their wide utilization in those devices. Additionally, two-phase flow and the associated heat transfer are becoming increasingly important in industrial applications because the heat transfer coefficient in twophase flows is much higher than in single-phase flows. In this research, major topics such as heat transfer, pressure drop, friction factor and void fraction were studied using active and passive techniques in the literature. The fluids used in the reviewed studies diverse in a very wide range. For pure refrigerants (single component-fluorocarbon refrigerant),

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Section: Mass Fluxmentioning

confidence: 67%

“…Celen et al [101], Dalkılıç et al [144], observed that the heat transfer coefficient has increased at all saturation temperatures. This situation was expected.…”

Section: Saturation Temperaturementioning

confidence: 94%

Section: Mass Fluxmentioning

confidence: 97%

Section: Subcooled Boilingmentioning

confidence: 99%

“…Dalkılıç et al [144] conducted practical research on the flow boiling of R134 in a microchannel heat sink. They employed rectangular micro-channels as heat sinks.…”

Section: Subcooled Boilingmentioning

confidence: 99%

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