Condensation of a nonazeotropic refrigerant mixture R114/R113 in horizontal annuli with an enhanced inner tube

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2911247· OSTI ID:5097040

Nozu, Sh; Ozaki, K; Inaba, H ^[1]; Honda, H ^[2]

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1. Okayama Univ. (Japan)
2. Kyushu Univ., Fukuoka (Japan)

Local heat transfer and pressure drop measurements are made during condensation of a nonazeotropic refrigerant mixture R114/R113 in the annuli of horizontal doubletube condensers. The inner tube is a 19.1-mm-o.d. corrugated tube with copper wire fins soldered on the outer surface. The outer tubes are smooth tubes with different i.d. of 29.9 and 25.0 mm. The heat transfer coefficient based on the bulk-vapor to wall temperature difference is considerably smaller for R114/R113 mixtures than for pure R113. An empirical equation for the vapor phase mass transfer coefficient is derived, in which the dimensionless parameters are introduced on the basis of the previous results for turbulent single phase flow in smooth and rough tubes with and without surface suction. The measured condensation heat transfer coefficients for R114/R113 mixtures are correlated by the present model to a mean absolute deviation of 14.3 percent.

• OSTI ID: 5097040
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Journal Issue: 1 Vol. 114:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ANNULAR SPACE
BENCH-SCALE EXPERIMENTS
CHLOROFLUOROCARBONS
CONFIGURATION
COPPER
ELEMENTS
ENERGY TRANSFER
FINS
FLUID FLOW
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
METALS
MULTIPHASE FLOW
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PRESSURE DROP
SPACE
TRANSITION ELEMENTS
TUBES
VAPOR CONDENSATION