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Condensation pressure drop and heat transfer in 5-MM-OD micro-fin tubes

Li, Wei LU ; Huang, Dan LU ; Wu, Zan LU ; Li, Hong Xia; Zhang, Zhao Yan; Hong, Rong Hua; Guo, Si Pu and Li, Jing (2012) ASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012 2. p.41-50
Abstract

An experimental investigation was performed for convective condensation of R410A inside four micro-fin tubes with the same outside diameter (OD) 5 mm and helix angle 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m2s. 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. Condensation heat transfer coefficient decreases at first and then increases or flattens out gradually as G decreases. This complex mass-flux effect may be explained by the complex interactions between micro-fins and fluid. The heat... (More)

An experimental investigation was performed for convective condensation of R410A inside four micro-fin tubes with the same outside diameter (OD) 5 mm and helix angle 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m2s. 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. Condensation heat transfer coefficient decreases at first and then increases or flattens out gradually as G decreases. This complex mass-flux effect may be explained by the complex interactions between micro-fins and fluid. 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 was analyzed using seven existing pressure-drop and four heat-transfer models to verify their respective accuracies.

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Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
keywords
Condensation, Heat transfer, Mass flux, Micro-fin tube, Pressure drop
host publication
ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
volume
2
pages
10 pages
conference name
ASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
conference location
Rio Grande, Puerto Rico
conference dates
2012-07-08 - 2012-07-12
external identifiers
  • scopus:84892657081
ISBN
9780791844786
DOI
10.1115/HT2012-58051
language
English
LU publication?
no
id
ffdd75d8-e63b-48b6-bb34-353850434118
date added to LUP
2018-11-01 09:26:12
date last changed
2019-02-20 11:34:11
@inproceedings{ffdd75d8-e63b-48b6-bb34-353850434118,
  abstract     = {<p>An experimental investigation was performed for convective condensation of R410A inside four micro-fin tubes with the same outside diameter (OD) 5 mm and helix angle 18°. Data are for mass fluxes ranging from about 180 to 650 kg/m<sup>2</sup>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. Condensation heat transfer coefficient decreases at first and then increases or flattens out gradually as G decreases. This complex mass-flux effect may be explained by the complex interactions between micro-fins and fluid. 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 was analyzed using seven existing pressure-drop and four heat-transfer models to verify their respective accuracies.</p>},
  author       = {Li, Wei and Huang, Dan and Wu, Zan and Li, Hong Xia and Zhang, Zhao Yan and Hong, Rong Hua and Guo, Si Pu and Li, Jing},
  isbn         = {9780791844786},
  keyword      = {Condensation,Heat transfer,Mass flux,Micro-fin tube,Pressure drop},
  language     = {eng},
  location     = {Rio Grande, Puerto Rico},
  month        = {12},
  pages        = {41--50},
  title        = {Condensation pressure drop and heat transfer in 5-MM-OD micro-fin tubes},
  url          = {http://dx.doi.org/10.1115/HT2012-58051},
  volume       = {2},
  year         = {2012},
}