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Effect of cross sectional shape during condensation in a single square minichannel

Del Col, Davide ; Bortolin, Stefano ; Cavallini, Alberto ; Matkovic, Marko

International journal of heat and mass transfer, 2011-08, Vol.54 (17), p.3909-3920 [Periódico revisado por pares]

Kidlington: Elsevier Ltd

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Título:
Effect of cross sectional shape during condensation in a single square minichannel
Autor: Del Col, Davide ; Bortolin, Stefano ; Cavallini, Alberto ; Matkovic, Marko
Assuntos: Applied sciences ; Condensation ; Energy ; Energy. Thermal use of fuels ; Exact sciences and technology ; Heat transfer ; Local heat transfer coefficient ; Minichannel ; Square cross section ; Theoretical studies. Data and constants. Metering
É parte de: International journal of heat and mass transfer, 2011-08, Vol.54 (17), p.3909-3920
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The objective of this work is to present new condensation heat transfer coefficients measured inside a single square cross section minichannel, having a 1.18 mm side length, and compare them to the ones previously measured in a circular minichannel. Tests have been performed with R134a at 40 °C saturation temperature, at mass velocity ranging between 200 and 800 kg m −2 s −1. As compared to the heat transfer coefficients measured in the circular cross section channel, for the same hydraulic diameter, in the square minichannel the authors find a heat transfer enhancement at the lowest value of mass velocity, which must be due to the effect of surface tension. No heat transfer coefficient increase has been found at the highest values of the mass velocity where condensation is shear stress dominated.
Editor: Kidlington: Elsevier Ltd
Idioma: Inglês

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Effect of cross sectional shape during condensation in a single square minichannel

Del Col, Davide ; Bortolin, Stefano ; Cavallini, Alberto ; Matkovic, Marko

Kidlington: Elsevier Ltd

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