This paper presents an experimental investigation of condensation heat transfer and pressure drop characteristics of refrigerant R-134a flowing through an annular helicoidal passage with the hydraulic diameter of 8.5 mm. The angles of helix axis are oriented at 0, 45, 90 degrees to gravity. The overall and refrigerant-side heat transfer coefficients and pressure drops are experimentally determined at saturation temperature 35°C, refrigerant mass flux 35–180 kg/s·m2, and cooling water temperature 27°C. The results show that orientation has significant influence on the thermal and hydraulic behaviors of the helical pipe. The results can be employed for reference in the effective design of annular helicoidal heat exchangers with R-134a as the working fluid.
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ASME 2003 Heat Transfer Summer Conference
July 21–23, 2003
Las Vegas, Nevada, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-3694-0
PROCEEDINGS PAPER
Condensation Heat Transfer and Pressure Drop of R-134a Flowing in Annular Helical Pipes at Different Orientations
C. X. Lin,
C. X. Lin
Florida International University, Miami, FL
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M. A. Ebadian,
M. A. Ebadian
Florida International University, Miami, FL
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R. C. Prattipati
R. C. Prattipati
Florida International University, Miami, FL
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B. Yu
Florida International University, Miami, FL
C. X. Lin
Florida International University, Miami, FL
M. A. Ebadian
Florida International University, Miami, FL
R. C. Prattipati
Florida International University, Miami, FL
Paper No:
HT2003-47236, pp. 429-434; 6 pages
Published Online:
December 17, 2008
Citation
Yu, B, Lin, CX, Ebadian, MA, & Prattipati, RC. "Condensation Heat Transfer and Pressure Drop of R-134a Flowing in Annular Helical Pipes at Different Orientations." Proceedings of the ASME 2003 Heat Transfer Summer Conference. Heat Transfer: Volume 2. Las Vegas, Nevada, USA. July 21–23, 2003. pp. 429-434. ASME. https://doi.org/10.1115/HT2003-47236
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