Abstract
An experimental investigation of heat transfer to boiling liquids with natural convective flow has been carried out in a single tube natural circulation reboiler. Three test liquids—water, acetone, and ethylene glycol—were used to cover a wide range of boiling points and thermophysical properties. The heat transfer section consisted of an electrically heated stainless steel tube, 25.56 mm ID and 1900 mm long. The uniform heat fluxes in the range of 3800–40,000 W/m 2 were employed while inlet liquid subcooling varied from 0.2–45.5°C. The liquid submergence levels were maintained around 100, 75, 50, and 30 percent. All the data were generated at 1 atmospheric pressure. The effect of heat flux and submergence on the variation of circulation rates have been graphically presented and discussed. Circulation rates for all test liquids have been correlated in terms of dimensionless groups.
Published Version
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