On flow boiling of R-1270 in a small horizontal tube: Flow patterns and heat transfer

Jeferson Diehl de Oliveira; Jacqueline Biancon Copetti; Julio Cesar Passos; Cees W.M. van der Geld

doi:10.1016/j.applthermaleng.2020.115403

On flow boiling of R-1270 in a small horizontal tube: Flow patterns and heat transfer

Jeferson Diehl de Oliveira (Corresponding author), Jacqueline Biancon Copetti, Julio Cesar Passos, Cees W.M. van der Geld

Process and Product Design

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Abstract

An experimental study was performed to investigate both flow patterns and heat transfer during flow boiling of propylene (R-1270) at a saturation temperature of 25 °C in a small circular tube with an inner diameter of 1.0 mm. The heat flux was varied from 5 to 60 kW/m² and the mass flux ranged from 240 up to 480 kg/m² s, with vapor quality ranging from 0.01 to 0.99. Five flow patterns were identified: plug flow, slug flow, churn flow, wavy- and (smooth) annular flow. The influence of the heat flux, mass flux, vapor quality and flow pattern on the heat transfer coefficient are quantified and analyzed. The new experimental heat transfer coefficients were compared with predictions of correlations found in literature and recommendations are presented.

Original language	English
Article number	115403
Number of pages	14
Journal	Applied Thermal Engineering
Volume	178
DOIs	https://doi.org/10.1016/j.applthermaleng.2020.115403
Publication status	Published - Sept 2020

Funding

This research project was financially supported by the Brazilian National Council of Research (CNPq), through the project 162620/2015–2 and by PETROBRAS/ANEEL, through the project PD-0553–0023/2012.

Keywords

Flow boiling
Flow patterns
Heat transfer
Horizontal tube
Minichannel
Propylene

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10.1016/j.applthermaleng.2020.115403

1-s2.0-S1359431119345648-mainFinal published version, 3.78 MBLicence: TAVERNE

Cite this

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title = "On flow boiling of R-1270 in a small horizontal tube: Flow patterns and heat transfer",

abstract = "An experimental study was performed to investigate both flow patterns and heat transfer during flow boiling of propylene (R-1270) at a saturation temperature of 25 °C in a small circular tube with an inner diameter of 1.0 mm. The heat flux was varied from 5 to 60 kW/m2 and the mass flux ranged from 240 up to 480 kg/m2 s, with vapor quality ranging from 0.01 to 0.99. Five flow patterns were identified: plug flow, slug flow, churn flow, wavy- and (smooth) annular flow. The influence of the heat flux, mass flux, vapor quality and flow pattern on the heat transfer coefficient are quantified and analyzed. The new experimental heat transfer coefficients were compared with predictions of correlations found in literature and recommendations are presented.",

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AB - An experimental study was performed to investigate both flow patterns and heat transfer during flow boiling of propylene (R-1270) at a saturation temperature of 25 °C in a small circular tube with an inner diameter of 1.0 mm. The heat flux was varied from 5 to 60 kW/m2 and the mass flux ranged from 240 up to 480 kg/m2 s, with vapor quality ranging from 0.01 to 0.99. Five flow patterns were identified: plug flow, slug flow, churn flow, wavy- and (smooth) annular flow. The influence of the heat flux, mass flux, vapor quality and flow pattern on the heat transfer coefficient are quantified and analyzed. The new experimental heat transfer coefficients were compared with predictions of correlations found in literature and recommendations are presented.

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On flow boiling of R-1270 in a small horizontal tube: Flow patterns and heat transfer

Abstract

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Keywords

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