Heat transfer characteristics in two-phase closed conventional and concentric annular thermosyphons

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3250726· OSTI ID:6018959

Faghri, A; Chen, M M; Morgan, M ^[1]

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1. Wright State Univ., Dayton, OH (United States)

The heat transfer in the condenser sections of conventional and annular two-phase closed thermosyphon tubes has been studied experimentally and analytically. In addition, the results of a series of experiments on the flooding phenomena of the same thermosyphons are reported. Freon 113 and acetone were used as working fluids. An improved correlation was developed to predict the performance limits of conventional thermosyphons using the present and previously existing experimental data for flooding with different working fluids. The prediction of the theoretical Nusselt number for the situations associated with measured heat transfer coefficients in the condenser section indicated that the effect of interfacial shear on the film flow is small. The increase of the experimental reflux condensation heat transfer coefficients over theoretical predictions is attributed to waves at the vapor-liquid interface.

• OSTI ID: 6018959
• 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) Vol. 111:3; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ACETONE
COOLING
DATA
ENERGY TRANSFER
EXPERIMENTAL DATA
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT TRANSFER
INFORMATION
KETONES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PERMAFROST
PRESERVATION
ROADS
THAWING
THERMOSYPHONS
TURBINE BLADES