Proceedings ArticleDOI
Evaporation in microchannels: influence of the channel diameter on heat transfer
Vincent Dupont,John R. Thome +1 more
TLDR
In this article, the effect of diameter on both flow boiling heat transfer and transition from macro to microchannel evaporation was discussed, and a three-zone flow boiling model was proposed to predict an increase in the two-phase heat transfer coefficient with a decrease of diameter for low values of vapor quality.Abstract:
This paper discusses the effect of diameter on both flow boiling heat transfer and transition from macro to microchannel evaporation. A recently proposed three-zone flow boiling model based on evaporation of elongated bubbles in microchannels is briefly described and used for the present analysis. In the microscale range, the model predicts an increase in the two-phase heat transfer coefficient with a decrease of diameter for low values of vapor quality and a decrease of the heat transfer coefficient for larger values of vapor quality. This behavior is explained by the influence of the liquid film thickness, deposited periodically behind passing liquid slugs.read more
Citations
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Journal ArticleDOI
A composite heat transfer correlation for saturated flow boiling in small channels
TL;DR: In this article, a composite correlation is developed from a database of 3899 data points from 14 studies in the literature covering 12 different wetting and non-wetting fluids, hydraulic diameters ranging from 016 to 292mm, and confinement numbers from 03 to 40.
Journal ArticleDOI
Suppression of Boiling Flow Oscillations in Parallel Microchannels by Inlet Restrictors
TL;DR: In this paper, a dimensionless parameter M, which accounts for the pressure drop increase imposed by the inlet restrictors, has been used to correlate the extent of flow instability suppression.
Suppression of Boiling Flow Oscillations in Parallel Microchannels by Inlet
Chih-Jung Kuo,Yoav Peles +1 more
TL;DR: In this article, a dimensionless parameter M, which accounts for the pressure drop increase imposed by the inlet restrictors, has been used to correlate the extent of flow instability suppression.
Journal ArticleDOI
Microchannel size effects on local flow boiling heat transfer to a dielectric fluid
TL;DR: In this article, the authors investigate the local flow boiling heat transfer of a dielectric fluid, Fluorinert FC-77, in microchannel heat sinks and show that the heat transfer coefficients corresponding to a fixed wall heat flux as well as the boiling curves are independent of channel size.
Journal ArticleDOI
Effects of heat flux, mass flux, vapor quality, and saturation temperature on flow boiling heat transfer in microchannels
TL;DR: In this article, the authors investigated flow boiling heat transfer with the refrigerants R-134a and R-245fa in copper microchannel cold plate evaporators and found that nucleate boiling dominates the heat transfer.
References
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Journal ArticleDOI
Correlations for the prediction of boiling heat transfer in small-diameter channels
P.A. Kew,Keith Cornwell +1 more
TL;DR: In this paper, the authors describe aspects of the work relating to boiling in single, small-diameter tubes as part of a study of compact two-phase heat exchangers.
Journal ArticleDOI
Evaporative heat transfer, pressure drop and critical heat flux in a small vertical tube with R-113
G.M. Lazarek,S.H. Black +1 more
TL;DR: The local heat transfer coefficient, pressure drop, and critical heat flux have been measured for saturated boiling of R-113 in a round tube with an internal diameter of 0.31 cm, and heated lengths of 12.3 and 24.6 cm.
Journal ArticleDOI
Heat transfer model for evaporation in microchannels. Part I: presentation of the model
TL;DR: In this article, a three-zone flow boiling model was proposed to describe evaporation of elongated bubbles in microchannels, and a time-averaged local heat transfer coefficient was obtained.
Journal ArticleDOI
Small circular- and rectangular-channel boiling with two refrigerants
T.N. Tran,M.W. Wambsganss +1 more
TL;DR: In this article, a small circular channel (d = 2.46) and a small rectangular channel with Refrigerant 12.5 was used to study the effects of channel geometry and fluid properties on heat transfer.
Journal Article
Heat Transfer Model for Evaporation in Microchannels, Part I: Presentation of the Model
TL;DR: In this paper, the authors present a Web of Science Record created on 2005-07-06, modified on 2017-05-10 for a paper entitled "Reference LTCM-ARTICLE-2005-021:
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