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Prediction of evaporation heat transfer coefficient based on gas-liquid two-phase annular flow regime in horizontal microfin tubes

Abstract

A physical model of gas-liquid two-phase annular flow regime is presented for predicting the enhanced evaporation heat transfer characteristics in horizontal microfin tubes. The model is based on the equivalence of a periodical distortion of the disturbance wave in the substrate layer. Corresponding to the stratified flow model proposed previously by authors, the dimensionless quantity Fr{sub 0} = G/[gd{sub e}{rho}{sub v}({rho}{sub l} - {rho}{sub v})]{sup 0.5} may be used as a measure for determining the applicability of the present theoretical model, which was used to restrict the transition boundary between the stratified-wavy flow and the annular/intermittent flows. Comparison of the prediction of the circumferential average heat transfer coefficient with available experimental data for four tubes and three refrigerants reveals that a good agreement is obtained or the trend is better than that of the previously developed stratified flow model for Fr{sub 0} > 4.0 as long as the partial dry out of tube does not occur. Obviously, the developed annular model is applicable and reliable for evaporation in horizontal microfin tubes under the case of high heat flux and high mass flux.
Authors:
Wang Yueshe, E-mail: wangys@mail.xjtu.edu.cn; [1]  Yanling, Wang; [1]  Wang, G -X; [2]  Honda, Hiroshi [3] 
  1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)
  2. Mechanical Engineering Department, The University of Akron, Akron, OH 44325-3903 (United States)
  3. Kyushu University, 337 Kasuya-machi, Kasuya-gun, Kukuoka 811-2307 (Japan)
Publication Date:
Oct 15, 2009
Product Type:
Journal Article
Resource Relation:
Journal Name: Applied Thermal Engineering; Journal Volume: 29; Journal Issue: 14-15; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Subject:
42 ENGINEERING; DISTURBANCES; EVAPORATION; EVAPORATIVE COOLING; EXPERIMENTAL DATA; FLOW MODELS; HEAT FLUX; HEAT TRANSFER; MASS TRANSFER; REFRIGERANTS; SUBSTRATES; TUBES; TWO-PHASE FLOW
OSTI ID:
22062536
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1359-4311; CODEN: ATENFT; Other: PII: S1359-4311(09)00084-2; TRN: GB09R3499021725
Availability:
Available from http://dx.doi.org/10.1016/j.applthermaleng.2009.03.006
Submitting Site:
INIS
Size:
page(s) 2970-2976
Announcement Date:
Mar 08, 2013

Citation Formats

Wang Yueshe, E-mail: wangys@mail.xjtu.edu.cn, Yanling, Wang, Wang, G -X, and Honda, Hiroshi. Prediction of evaporation heat transfer coefficient based on gas-liquid two-phase annular flow regime in horizontal microfin tubes. United Kingdom: N. p., 2009. Web. doi:10.1016/J.APPLTHERMALENG.2009.03.006.
Wang Yueshe, E-mail: wangys@mail.xjtu.edu.cn, Yanling, Wang, Wang, G -X, & Honda, Hiroshi. Prediction of evaporation heat transfer coefficient based on gas-liquid two-phase annular flow regime in horizontal microfin tubes. United Kingdom. doi:10.1016/J.APPLTHERMALENG.2009.03.006.
Wang Yueshe, E-mail: wangys@mail.xjtu.edu.cn, Yanling, Wang, Wang, G -X, and Honda, Hiroshi. 2009. "Prediction of evaporation heat transfer coefficient based on gas-liquid two-phase annular flow regime in horizontal microfin tubes." United Kingdom. doi:10.1016/J.APPLTHERMALENG.2009.03.006. https://www.osti.gov/servlets/purl/10.1016/J.APPLTHERMALENG.2009.03.006.
@misc{etde_22062536,
title = {Prediction of evaporation heat transfer coefficient based on gas-liquid two-phase annular flow regime in horizontal microfin tubes}
author = {Wang Yueshe, E-mail: wangys@mail.xjtu.edu.cn, Yanling, Wang, Wang, G -X, and Honda, Hiroshi}
abstractNote = {A physical model of gas-liquid two-phase annular flow regime is presented for predicting the enhanced evaporation heat transfer characteristics in horizontal microfin tubes. The model is based on the equivalence of a periodical distortion of the disturbance wave in the substrate layer. Corresponding to the stratified flow model proposed previously by authors, the dimensionless quantity Fr{sub 0} = G/[gd{sub e}{rho}{sub v}({rho}{sub l} - {rho}{sub v})]{sup 0.5} may be used as a measure for determining the applicability of the present theoretical model, which was used to restrict the transition boundary between the stratified-wavy flow and the annular/intermittent flows. Comparison of the prediction of the circumferential average heat transfer coefficient with available experimental data for four tubes and three refrigerants reveals that a good agreement is obtained or the trend is better than that of the previously developed stratified flow model for Fr{sub 0} > 4.0 as long as the partial dry out of tube does not occur. Obviously, the developed annular model is applicable and reliable for evaporation in horizontal microfin tubes under the case of high heat flux and high mass flux.}
doi = {10.1016/J.APPLTHERMALENG.2009.03.006}
journal = {Applied Thermal Engineering}
issue = {14-15}
volume = {29}
journal type = {AC}
place = {United Kingdom}
year = {2009}
month = {Oct}
}