This paper presents new experimental flow boiling pressure drop results in a microscale tube. The experimental data were obtained under diabatic conditions in a horizontal smooth tube with an internal diameter of 2.32 mm. Experiments were performed with R134a as working fluid, mass velocities ranging from to , heat flux ranging from to , saturation temperatures of , and exit vapor qualities from 0.20 to 0.99. Flow pattern characterization was also performed from images obtained by high-speed filming. Pressure drop gradients up to 48 kPa/m were measured. These data were carefully analyzed and compared against 13 two-phase frictional pressure drop prediction methods, including both macro- and microscale methods. Comparisons against these methods based on the data segregated according to flow patterns were also performed. Overall, the method by Cioncolini et al. (2009, “Unified Macro-to-Microscale Method to Predict Two-Phase Frictional Pressure Drops of Annular Flows,” Int. J. Multiphase Flow, 35, pp. 1138–1148) provided quite accurate predictions of the present database.
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March 2011
Research Papers
Experimental Investigation of Flow Boiling Pressure Drop of R134A in a Microscale Horizontal Smooth Tube
Cristiano Bigonha Tibiriçá,
Cristiano Bigonha Tibiriçá
Department of Mechanical Engineering,
e-mail: bigonha@sc.usp.br.
University of São Paulo
, Avenida Trabalhador São Carlense 400, 13566-970 São Carlos, SP, Brazil
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Jaqueline Diniz da Silva,
Jaqueline Diniz da Silva
Department of Mechanical Engineering,
e-mail: jaqueline@sc.usp.br
University of São Paulo
, Avenida Trabalhador São Carlense 400, 13566-970 São Carlos, SP, Brazil
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Gherhardt Ribatski
Gherhardt Ribatski
Department of Mechanical Engineering,
e-mail: ribatski@sc.usp.br
University of São Paulo
, Avenida Trabalhador São Carlense 400, 13566-970 São Carlos, SP, Brazil
Search for other works by this author on:
Cristiano Bigonha Tibiriçá
Department of Mechanical Engineering,
University of São Paulo
, Avenida Trabalhador São Carlense 400, 13566-970 São Carlos, SP, Brazile-mail: bigonha@sc.usp.br.
Jaqueline Diniz da Silva
Department of Mechanical Engineering,
University of São Paulo
, Avenida Trabalhador São Carlense 400, 13566-970 São Carlos, SP, Brazile-mail: jaqueline@sc.usp.br
Gherhardt Ribatski
Department of Mechanical Engineering,
University of São Paulo
, Avenida Trabalhador São Carlense 400, 13566-970 São Carlos, SP, Brazile-mail: ribatski@sc.usp.br
J. Thermal Sci. Eng. Appl. Mar 2011, 3(1): 011006 (8 pages)
Published Online: April 4, 2011
Article history
Received:
September 13, 2010
Revised:
February 15, 2011
Online:
April 4, 2011
Published:
April 4, 2011
Citation
Tibiriçá, C. B., Diniz da Silva, J., and Ribatski, G. (April 4, 2011). "Experimental Investigation of Flow Boiling Pressure Drop of R134A in a Microscale Horizontal Smooth Tube." ASME. J. Thermal Sci. Eng. Appl. March 2011; 3(1): 011006. https://doi.org/10.1115/1.4003728
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