The present paper reports the heat transfer coefficients measured during flow boiling of HFC-32 and HFC-134a in a 0.96 mm diameter single circular channel. The test runs have been performed during vaporization at around 30°C saturation temperature, correspondent to 19.3 bar for R32 and 7.7 bar for R134a. As a peculiar characteristic of the present technique, the heat transfer coefficient is not measured by imposing the heat flux; instead, the boiling process is governed by controlling the inlet temperature of the heating secondary fluid. The quality of the inner surface of the test tube has been measured to check the influence of surface roughness on the heat transfer coefficient. The flow boiling data taken in the present test section is presented and discussed, with particular regard to the effect of heat flux, mass velocity, vapor quality and fluid properties.
Skip Nav Destination
ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels
June 23–25, 2008
Darmstadt, Germany
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4834-5
PROCEEDINGS PAPER
Flow Boiling of Refrigerants Inside a Single Circular Minichannel
Stefano Bortolin,
Stefano Bortolin
University of Padova, Padova, Italy
Search for other works by this author on:
Alberto Cavallini,
Alberto Cavallini
University of Padova, Padova, Italy
Search for other works by this author on:
Davide Del Col,
Davide Del Col
University of Padova, Padova, Italy
Search for other works by this author on:
Marko Matkovic,
Marko Matkovic
University of Padova, Padova, Italy
Search for other works by this author on:
Luisa Rossetto
Luisa Rossetto
University of Padova, Padova, Italy
Search for other works by this author on:
Stefano Bortolin
University of Padova, Padova, Italy
Alberto Cavallini
University of Padova, Padova, Italy
Davide Del Col
University of Padova, Padova, Italy
Marko Matkovic
University of Padova, Padova, Italy
Luisa Rossetto
University of Padova, Padova, Italy
Paper No:
ICNMM2008-62270, pp. 649-656; 8 pages
Published Online:
June 11, 2009
Citation
Bortolin, S, Cavallini, A, Del Col, D, Matkovic, M, & Rossetto, L. "Flow Boiling of Refrigerants Inside a Single Circular Minichannel." Proceedings of the ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. Darmstadt, Germany. June 23–25, 2008. pp. 649-656. ASME. https://doi.org/10.1115/ICNMM2008-62270
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Hydrocarbon Refrigerant Vaporization Inside a Brazed Plate Heat Exchanger
J. Heat Transfer (October,2012)
Thermal Management of Time-Varying High Heat Flux Electronic Devices
J. Electron. Packag (June,2014)
Experimental Study of Pool Boiling Enhancement Using a Two-Step Electrodeposited Cu–GNPs Nanocomposite Porous Surface With R-134a
J. Heat Transfer (December,2021)
Related Chapters
Scope of Section I, Organization, and Service Limits
Power Boilers: A Guide to the Section I of the ASME Boiler and Pressure Vessel Code, Second Edition
Pool Boiling
Thermal Management of Microelectronic Equipment, Second Edition
Thermal Design Guide of Liquid Cooled Systems
Thermal Design of Liquid Cooled Microelectronic Equipment