Pressure drop characteristics of R134a in annular helicoidal pipe was investigated experimentally with R134a flowing in the annular section. The experimental results revealed that when more R134a vapor was condensed, the liquid phase pressure drop increased largely while the vapor phase pressure drop decreased slightly. By comparing with the experimental data obtained from the same test section with R134a flowing in the inner circular tube of the helicoidal pipe, it was observed that the pressure drop for refrigerant in the annular section was always larger. It was also observed that the helicoidal pipe orientation showed little effect on the pressure drop variations. A pressure drop correlation was developed from the experimental data in terms of pressure drop multiplier with respect to Lockhart-Martinelli parameter.
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ASME 2004 International Mechanical Engineering Congress and Exposition
November 13–19, 2004
Anaheim, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4711-X
PROCEEDINGS PAPER
Pressure Drop Study and Correlation Development for Two-Phase Flow of R134a in Annular Helicoidal Pipe
R. Prattipati,
R. Prattipati
Florida International University
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C. X. Lin
C. X. Lin
Florida International University
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H. L. Mo
Florida International University
R. Prattipati
Florida International University
C. X. Lin
Florida International University
Paper No:
IMECE2004-61729, pp. 671-676; 6 pages
Published Online:
March 24, 2008
Citation
Mo, HL, Prattipati, R, & Lin, CX. "Pressure Drop Study and Correlation Development for Two-Phase Flow of R134a in Annular Helicoidal Pipe." Proceedings of the ASME 2004 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 2. Anaheim, California, USA. November 13–19, 2004. pp. 671-676. ASME. https://doi.org/10.1115/IMECE2004-61729
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