Evaporation heat transfer and flow characteristics of R-134a flowing through internally grooved tubes View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2011-06

AUTHORS

Somchai Wongwises, Suriyan Laohalertdecha, Jatuporn Kaew-on, Weerapun Duangthongsuk, Kanit Aroonrat, Kittipong Sakamatapan

ABSTRACT

This article describes experimental investigations of the heat transfer coefficient and pressure drop of R-134a flowing inside internally grooved tubes. The test tubes are one smooth tube and four grooved tubes. All test tubes are made from type 304 stainless steel, have an inner diameter of 7.1 mm, are 2,000 mm long and are installed horizontally. The test section is uniformly heated by a DC power supply to create evaporation conditions. The groove depth of all grooved tubes is fixed at 0.2 mm. The experimental conditions are conducted at saturation temperatures of 20, 25 and 30°C, heat fluxes of 5, 10 and 15 kW/m2, and mass fluxes of 300, 500 and 700 kg/m2 s. The effects of groove pitch, mass flux, heat flux, and saturation temperature on heat transfer coefficient and frictional pressure drop are discussed. The results illustrate that the grooved tubes have a significant effect on the heat transfer coefficient and frictional pressure drop augmentations. More... »

PAGES

629-640

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00231-010-0748-6

DOI

http://dx.doi.org/10.1007/s00231-010-0748-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1051908746


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