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Convective Condensation of R410A in Micro-Fin Tubes

Zhang, Guan-min; Wu, Zan LU ; Wang, Xu and Li, Wei (2012) In Journal of Enhanced Heat Transfer 19(6).
Abstract
An experimental investigation was performed for convective condensation ofR410A inside five micro-fin tubes with the same outer diameter of 5 mm and helix angle of 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m2 s. The nominal saturation temperature is 320 K, with inlet and outlet qualities of 0.8 and 0.1, respectively. The results suggest that tube 4 has the best thermal performance for its largest condensation heat-transfer coefficient and relatively low pressure-drop penalty. The heat-transfer enhancement mechanism is mainly due to the surface area increase over the plain tube at large mass fluxes, while liquid drainage and interfacial turbulence play important roles in heat-transfer enhancement at low mass fluxes. In... (More)
An experimental investigation was performed for convective condensation ofR410A inside five micro-fin tubes with the same outer diameter of 5 mm and helix angle of 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m2 s. The nominal saturation temperature is 320 K, with inlet and outlet qualities of 0.8 and 0.1, respectively. The results suggest that tube 4 has the best thermal performance for its largest condensation heat-transfer coefficient and relatively low pressure-drop penalty. The heat-transfer enhancement mechanism is mainly due to the surface area increase over the plain tube at large mass fluxes, while liquid drainage and interfacial turbulence play important roles in heat-transfer enhancement at low mass fluxes. In addition, the experimental data were analyzed using seven existing pressure-drop and four heat-transfer models to verify their respective accuracies. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Enhanced Heat Transfer
volume
19
issue
6
publisher
Begell House
external identifiers
  • scopus:84870907406
ISSN
1563-5074
DOI
10.1615/JEnhHeatTransf.2012006001
language
English
LU publication?
no
id
8f6d30af-4774-42de-a3eb-46eeeaf4c59a (old id 4285396)
alternative location
http://www.dl.begellhouse.com/journals/4c8f5faa331b09ea,606abcbf1d8212d4,68a498714d2d4bf7.html
date added to LUP
2014-02-06 15:52:20
date last changed
2017-01-01 03:51:10
@article{8f6d30af-4774-42de-a3eb-46eeeaf4c59a,
  abstract     = {An experimental investigation was performed for convective condensation ofR410A inside five micro-fin tubes with the same outer diameter of 5 mm and helix angle of 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m2 s. The nominal saturation temperature is 320 K, with inlet and outlet qualities of 0.8 and 0.1, respectively. The results suggest that tube 4 has the best thermal performance for its largest condensation heat-transfer coefficient and relatively low pressure-drop penalty. The heat-transfer enhancement mechanism is mainly due to the surface area increase over the plain tube at large mass fluxes, while liquid drainage and interfacial turbulence play important roles in heat-transfer enhancement at low mass fluxes. In addition, the experimental data were analyzed using seven existing pressure-drop and four heat-transfer models to verify their respective accuracies.},
  author       = {Zhang, Guan-min and Wu, Zan and Wang, Xu and Li, Wei},
  issn         = {1563-5074},
  language     = {eng},
  number       = {6},
  publisher    = {Begell House},
  series       = {Journal of Enhanced Heat Transfer},
  title        = {Convective Condensation of R410A in Micro-Fin Tubes},
  url          = {http://dx.doi.org/10.1615/JEnhHeatTransf.2012006001},
  volume       = {19},
  year         = {2012},
}