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Flow-pattern based heat transfer correlations for stable flow boiling in micro/minichannels

Wu, Zan LU and Sundén, Bengt LU (2015) In Journal of Heat Transfer 138(3). p.1-031501
Abstract
Flow-pattern based heat transfer correlations for elongated bubbly flow and annular flow in stable flow boiling micro/minichannels were developed separately based on a collected micro/minichannel heat-transfer database by using an improved conventional-to-micro/minichannel threshold Bo = 4 and BoRel0.5 = 200, where Bo is the Bond number and Rel is the liquid Reynolds number. As significant disagreement in experimental trends and heat transfer mechanisms was reported for flow boiling in micro/minichannels in the literature, it is not possible to explain the discrepancy and predict all data points by a single correlation without considering the different flow patterns. The newly developed flow-pattern based predictive tool cannot only... (More)
Flow-pattern based heat transfer correlations for elongated bubbly flow and annular flow in stable flow boiling micro/minichannels were developed separately based on a collected micro/minichannel heat-transfer database by using an improved conventional-to-micro/minichannel threshold Bo = 4 and BoRel0.5 = 200, where Bo is the Bond number and Rel is the liquid Reynolds number. As significant disagreement in experimental trends and heat transfer mechanisms was reported for flow boiling in micro/minichannels in the literature, it is not possible to explain the discrepancy and predict all data points by a single correlation without considering the different flow patterns. The newly developed flow-pattern based predictive tool cannot only present a decent overall accuracy, but also estimate the parametric trends relatively well. Over 95% of the data points can be predicted by the proposed correlations within a ±50% error band for both elongated bubbly flow and annular flow. Therefore, the flow-pattern based correlations can be applied for heat exchanger design to improve the understanding of the underlying heat transfer mechanisms and to guide the development of further enhancement techniques for flow boiling in micro/minichannels. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Heat Transfer
volume
138
issue
3
pages
1 - 031501
publisher
American Society Of Mechanical Engineers (ASME)
external identifiers
  • scopus:84947447190
ISSN
0022-1481
DOI
10.1115/1.4031882
language
English
LU publication?
yes
id
002189f5-ac20-4575-8ad5-34e90fbc0898 (old id 8312422)
date added to LUP
2015-12-16 10:27:27
date last changed
2017-09-10 04:18:05
@article{002189f5-ac20-4575-8ad5-34e90fbc0898,
  abstract     = {Flow-pattern based heat transfer correlations for elongated bubbly flow and annular flow in stable flow boiling micro/minichannels were developed separately based on a collected micro/minichannel heat-transfer database by using an improved conventional-to-micro/minichannel threshold Bo = 4 and BoRel0.5 = 200, where Bo is the Bond number and Rel is the liquid Reynolds number. As significant disagreement in experimental trends and heat transfer mechanisms was reported for flow boiling in micro/minichannels in the literature, it is not possible to explain the discrepancy and predict all data points by a single correlation without considering the different flow patterns. The newly developed flow-pattern based predictive tool cannot only present a decent overall accuracy, but also estimate the parametric trends relatively well. Over 95% of the data points can be predicted by the proposed correlations within a ±50% error band for both elongated bubbly flow and annular flow. Therefore, the flow-pattern based correlations can be applied for heat exchanger design to improve the understanding of the underlying heat transfer mechanisms and to guide the development of further enhancement techniques for flow boiling in micro/minichannels.},
  author       = {Wu, Zan and Sundén, Bengt},
  issn         = {0022-1481},
  language     = {eng},
  number       = {3},
  pages        = {1--031501},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  series       = {Journal of Heat Transfer},
  title        = {Flow-pattern based heat transfer correlations for stable flow boiling in micro/minichannels},
  url          = {http://dx.doi.org/10.1115/1.4031882},
  volume       = {138},
  year         = {2015},
}