Abstract
AbstractThe evaporation of aqueous solutions with varying surfactant concentrations was investigated with regard to foam formation and performance impairment of the reboiler. Foam formation was induced by partial evaporation in the reboiler and increased with rising driving temperature difference and decreasing operating pressure. Compared to the evaporation of pure water, the addition of surfactants resulted in a reduction in circulation velocity at higher heat fluxes. Temperature profiles in the reboiler tube and area‐averaged heat transfer coefficients were determined to characterize the thermal performance. Only at the lowest surfactant concentration a slight decrease in heat transfer was observed.
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