Gas desorption from seawater in open-cycle ocean thermal energy conversion barometric upcomers

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Journal of Solar Energy Engineering; (USA)

DOI:https://doi.org/10.1115/1.2930481· OSTI ID:6013303

Ghiaasiaan, S M; Wassel, A T ^[1]; Pesaran, A A ^[2]

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1. Science Applications International Corporation, Torrance, CA (US)
2. Solar Energy Research Inst., Golden, CO (USA)

Gas desorption from warm and cold seawater under open-cycle ocean thermal energy conversion (OC-OTEC) conditions is addressed in this paper. The desorption process of dissolved O{sub 2}, N{sub 2}, and CO{sub 2} in the barometric upcomers of an OTEC plant is simulated mathematically. The model considers the growth of bubbles originating in the ocean and bubbles formed in the upcomers. Bubble growth is induced by gas mass transfer and water evaporation at the bubble-liquid interface, as well as by the decreasing hydrostatic pressure. Heterogeneous nucleation at pipe wall crevices and on suspended particles in the water stream is also modeled. Bubble coalescence due to turbulent shear and differential buoyancy is simulated. The results generated show the deaeration efficiency as a function of flow and geometric parameters. The calculations show that gas desorption in the barometric upcomers can be appreciable. Such desorption is enhanced by increasing the concentration of the incoming and/or the heterogeneously formed bubbles. Results of existing experiments are discussed and predictions are shown for the selected test conditions.

• OSTI ID: 6013303
• Journal Information: Journal of Solar Energy Engineering; (USA), Journal Name: Journal of Solar Energy Engineering; (USA) Vol. 112:3; ISSN 0199-6231; ISSN JSEED
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
DEGASSING
DESORPTION
DISSOLVED GASES
FLUID MECHANICS
FLUIDS
GASES
HYDRODYNAMICS
HYDROGEN COMPOUNDS
MATHEMATICAL MODELS
MECHANICS
OCEAN THERMAL POWER PLANTS
OXYGEN COMPOUNDS
POWER PLANTS
REMOVAL
SEAWATER
SOLAR POWER PLANTS
SOLUTES
THERMAL POWER PLANTS
THERMODYNAMICS
WATER