Evaluation of existing condensation heat transfer models in horizontal micro-fin tubes

Chamra, Louay M.; Tan, M. J.; Kung, Chea-Chun

doi:10.1016/j.expthermflusci.2003.10.006

Cited by 9 publications

(4 citation statements)

References 18 publications

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“…Webb and Kim [1], Thome [2], Chamra et al [3,4], Dalkilic and Wongwises [5], and Liebenberg and Meyer [6] have given comprehensive reviews of relevant literature about experimental investigations and semi-empirical or theoretical correlations. Nozu and Honda [7] numerically investigated heat transfer characteristics in annular flow regime for condensation inside horizontal microfin tubes.…”

Section: Introductionmentioning

confidence: 99%

Convective Condensation Inside Horizontal Smooth and Microfin Tubes

Sundén

Wang

et al. 2014

Journal of Heat Transfer

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An experimental investigation was performed for convective condensation of R410A inside one smooth tube (3.78mm, inner diameter) and six microfin tubes (4.54, 4.6 and 8.98 mm, fin root diameter) of different geometries for mass fluxes ranging from 99 to 603 kg m~^s~'. The experimental data were analyzed with updated flow pattern maps and evaluated with existing correlations. The heat transfer coefficient in the microfin tubes decreases at first and then increases or flattens out gradually as mass flux decreases. This obvious nonmonotonic heat transfer coefficient-mass flux relation may be explained by the complex interactions between the microfins and the fluid, mainly by surface tension effects. The heat transfer enhancement mechanism in microfin tubes is mainly due to the surface area increase at large mass fluxes, while liquid drainage by surface tension and interfacial turbulence enhance heat transfer greatly at low mass fluxes.

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Section: Introductionmentioning

confidence: 99%

Convective Condensation Inside Horizontal Smooth and Microfin Tubes

Sundén

Wang

et al. 2014

Journal of Heat Transfer

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“…Three correlations for condensation on microfin tubes [JJ1] and inside vertical tubes [JJ2] are reviewed. Models for condensation on a vertical wedge [JJ3], contact condensation in adjacent stagnation-flow boundary layers [JJ4], on noncircular tubes [JJ5], elliptical tubes with variable wall temperature [JJ6], a variable-conductivity fin [JJ7] and steam condensation in a vertical tube in the presence of non-condensables [JJ8] are presented.…”

Section: Modeling and Analysismentioning

confidence: 99%

Heat transfer—A review of 2004 literature

Goldstein

Ibele

Patankar

et al. 2010

International Journal of Heat and Mass Transfer

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“…As for refrigerants, they reported that R134a showed lower heat transfer coefficients with the smooth tube while R407C and R410A showed lower heat transfer coefficients with the microfin tube. Chamra et al [22] evaluated three existing condensation heat transfer models in horizontal microfin tubes. These models were the Cavallini et al model [23], the Yu and Koyama model [24], and the Kedzierski and Goncalves model [25].…”

Section: Introductionmentioning

confidence: 99%