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ISSN Online: 2379-1748

7th Thermal and Fluids Engineering Conference (TFEC)
SJR: 0.152 SNIP: 0.14 CiteScore™:: 0.5

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Clarivate CPCI (Proceedings) Scopus
May, 15-18, 2022 , Las Vegas, NV, USA


Get access (open in a dialog) pages 1021-1033
DOI: 10.1615/TFEC2022.the.041702


We propose an innovative but general approach for degassing from liquids without resorting to the use of membrane and heating, typically used in major industry under a high pressure conditions. Instead, we do the same mission at lower vacuum condition with small bubbles, which is relatively simple and less energy consuming. The two important driving mechanisms involved, solubility dependency on pressure and the diffusion through bubbles, are of major concern, and the latter issue extends to vapor bubble generation and its dynamics to estimate the mass diffusion from liquid to the inside of bubbles. We present some preliminary study results out of our experiments for degassing dissolved oxygen from water through our proposed process, using a 65 cm × 65 cm × 100 cm stainless tank filled with 338 L of water at different vacuum conditions, that is, 10, 20, and 30 kPa, respectively, at room temperature. In the present study, dissolved gases including oxygen are extracted and captured for the measurement of the volume and oxygen concentration, while the DO concentrations are also measured as the degassing sessions proceed. Unlike the conventional deaeration processes, in which the heat and mass transfer between droplets and vapor(steam) and between vapor(steam) bubbles and solution are involved resulting in significant charges in terms of its facility and energy, the proposed process that combines depressurization and bubble generation seems feasible and can provide a simple and low-energy consuming solution for general degassing processes.