Zusammenfassung
The mass and heat transfer processes occurring during the evaporation
of liquid hydrocarbon spills on land and water are described. Equations
are developed which permit predictions of liquid temperature and
evaporation rates. Experimental determinations of evaporation rates
for cumene, water, and gasoline were used to calculate the evaporative
mass-transfer coefficients which were then correlated with wind speed,
liquid pool size, and vapor-phase schmidt-number. Good agreement
was found between experimental and computed cumene temperature and
evaporation rates. The correlation was compared with that for flat-plate
mass transfer and showed good agreement, suggesting that turbulent
transfer occurs at a rate which is enhanced by the liquid surface
roughness. The more complicated problem of estimating the evaporation
rates of hydrocarbon mixtures, as in oil spills, is also broached.
Nutzer