Condensation heat transfer in rectangular microscale geometries

Srinivas Garimella; Akhil Agarwal; Brian M. Fronk

doi:10.1016/j.ijheatmasstransfer.2016.03.086

Condensation heat transfer in rectangular microscale geometries

Srinivas Garimella, Akhil Agarwal, Brian M. Fronk

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Heat transfer coefficients during condensation of refrigerant R134a in small hydraulic diameter (100 < D_h < 160 μm) rectangular (1 < AR < 4) channels are presented. A novel technique to accurately determine condensation heat duty and heat transfer coefficient in such microscale geometries at small Δx is used. Models in the literature that were developed for larger tubes are shown to under predict the data. A new model that accounts for the flow mechanisms during condensation at such small scales, and takes into account the effect of G, x, T_sat, D_h and AR, is developed. The model predicts 94% of the data in the intermittent, transition and annular flow regimes within ±25%.

Original language	English (US)
Pages (from-to)	98-110
Number of pages	13
Journal	International Journal of Heat and Mass Transfer
Volume	100
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2016.03.086
State	Published - Sep 1 2016

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1016/j.ijheatmasstransfer.2016.03.086

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title = "Condensation heat transfer in rectangular microscale geometries",

abstract = "Heat transfer coefficients during condensation of refrigerant R134a in small hydraulic diameter (100 < Dh < 160 μm) rectangular (1 < AR < 4) channels are presented. A novel technique to accurately determine condensation heat duty and heat transfer coefficient in such microscale geometries at small Δx is used. Models in the literature that were developed for larger tubes are shown to under predict the data. A new model that accounts for the flow mechanisms during condensation at such small scales, and takes into account the effect of G, x, Tsat, Dh and AR, is developed. The model predicts 94% of the data in the intermittent, transition and annular flow regimes within ±25%.",

author = "Srinivas Garimella and Akhil Agarwal and Fronk, {Brian M.}",

year = "2016",

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AU - Garimella, Srinivas

AU - Agarwal, Akhil

AU - Fronk, Brian M.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Heat transfer coefficients during condensation of refrigerant R134a in small hydraulic diameter (100 < Dh < 160 μm) rectangular (1 < AR < 4) channels are presented. A novel technique to accurately determine condensation heat duty and heat transfer coefficient in such microscale geometries at small Δx is used. Models in the literature that were developed for larger tubes are shown to under predict the data. A new model that accounts for the flow mechanisms during condensation at such small scales, and takes into account the effect of G, x, Tsat, Dh and AR, is developed. The model predicts 94% of the data in the intermittent, transition and annular flow regimes within ±25%.

AB - Heat transfer coefficients during condensation of refrigerant R134a in small hydraulic diameter (100 < Dh < 160 μm) rectangular (1 < AR < 4) channels are presented. A novel technique to accurately determine condensation heat duty and heat transfer coefficient in such microscale geometries at small Δx is used. Models in the literature that were developed for larger tubes are shown to under predict the data. A new model that accounts for the flow mechanisms during condensation at such small scales, and takes into account the effect of G, x, Tsat, Dh and AR, is developed. The model predicts 94% of the data in the intermittent, transition and annular flow regimes within ±25%.

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JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

ER -

Condensation heat transfer in rectangular microscale geometries

Abstract

All Science Journal Classification (ASJC) codes

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