Influences of subcooling on burnout of horizontal cylindrical heaters

Journal Article · Sun May 01 00:00:00 EDT 1988 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3250511· OSTI ID:5465398

Elkassabgi, Y; Lienhard, J H ^[1]

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1. Univ. of Houston, TX (USA)

The peak pool boiling heat flux is observed on horizontal cylindrical heaters in acetone, Freon-113, methanol, and isopropanol over ranges of subcooling from zero to 130C. Photographs, and the data themselves, revealed that there are three distinct burnout mechanisms at different levels of subcooling. Three interpretive models provide the basis for accurate correlations of the present data, and data from the literature, in each of the three regimes. Burnout is dictated by condensation on the walls of the vapor jets and columns at low subcooling. In the intermediate regime, burnout is limited by natural convection, which becomes very effective as vapor near the heater reduces boundary layer resistance. Burnout in the high-subcooling regime is independent of the level of subcooling, and is limited by the process of molecular effusion.

• OSTI ID: 5465398
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Vol. 110:2; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
HEATERS
BURNOUT
ACETONE
BOUNDARY LAYERS
CYLINDERS
DATA
FREONS
HEAT FLUX
MATHEMATICAL MODELS
MEDIUM TEMPERATURE
METHANOL
NATURAL CONVECTION
ORIENTATION
SUBCOOLING
VAPOR CONDENSATION
ALCOHOLS
CONVECTION
COOLING
ENERGY TRANSFER
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT TRANSFER
HYDROXY COMPOUNDS
INFORMATION
KETONES
LAYERS
MASS TRANSFER
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
420400* - Engineering- Heat Transfer & Fluid Flow