Peak pool boiling heat flux from horizontal cylinders in subcooled liquids

Thesis/Dissertation · Tue Dec 31 23:00:00 EST 1985

OSTI ID:6534301

Elkassabgi, Y

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 120/sup 0/C. Photographs, and the data themselves, reveal 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 subcoooling and is limited by the process of molecular effusion.

• Research Organization: Houston Univ., TX (USA)
• OSTI ID: 6534301
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ACETONE
ALCOHOLS
BOILING
BURNOUT
COOLING
CYLINDERS
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT FLUX
HEATERS
HYDROXY COMPOUNDS
KETONES
MEDIUM TEMPERATURE
METHANOL
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHASE TRANSFORMATIONS
POOL BOILING
PROPANOLS
SUBCOOLED BOILING
SUBCOOLING