Experiments on oxygen desorption from surface warm seawater under open-cycle ocean thermal energy conversion (OC-OTEC) conditions
Conference
·
OSTI ID:7024705
This paper reports the results of scoping deaeration experiments conducted with warm surface seawater under open-cycle ocean thermal energy conversion (OC-OTEC). Concentrations of dissolved oxygen in seawater at three locations (in the supply water, water leaving a predeaerator, and discharge water from an evaporator) were measured and used to estimate oxygen desorption levels. The results suggest that 7% to 60% of dissolved oxygen in the supply water was desorbed from seawater in the predeaerator for pressures ranging from 9 to 35 kPa. Bubble injection in the upcomer increased the oxygen desorption rate by 20% to 60%. The dependence of oxygen desorption with flow rate could not be determined. The data also indicated that at typical OC-OTEC evaporator pressures when flashing occurred, 75% to 95% of dissolved oxygen was desorbed overall from the warm seawater. The uncertainty in results is larger than one would desire. These uncertainties are attributed to the uncertainties and difficulties in the dissolved oxygen measurements. Methods to improve the measurements for future gas desorption studies for warm surface and cold deep seawater under OC-OTEC conditions are recommended. 14 refs., 5 figs., 2 tabs.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- Sponsoring Organization:
- DOE/CE
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 7024705
- Report Number(s):
- SERI/TP-254-3619; CONF-900449--8; ON: DE90000308
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
ACCURACY
BUBBLES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DATA
DATA COVARIANCES
DESORPTION
ELEMENTS
ERRORS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
NITROGEN
NONMETALS
NUMERICAL DATA
OPEN-CYCLE OCEAN THERMAL ENERGY CONVERSION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PLANNING
PRESSURE EFFECTS
RECOMMENDATIONS
RESEARCH PROGRAMS
SEAWATER
SURFACE WATERS
TEMPERATURE EFFECTS
TEMPERATURE GRADIENTS
THERMAL ENERGY
THERMAL ENERGY CONVERSION
WATER
140800* -- Solar Energy-- Ocean Energy Systems
ACCURACY
BUBBLES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DATA
DATA COVARIANCES
DESORPTION
ELEMENTS
ERRORS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
NITROGEN
NONMETALS
NUMERICAL DATA
OPEN-CYCLE OCEAN THERMAL ENERGY CONVERSION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PLANNING
PRESSURE EFFECTS
RECOMMENDATIONS
RESEARCH PROGRAMS
SEAWATER
SURFACE WATERS
TEMPERATURE EFFECTS
TEMPERATURE GRADIENTS
THERMAL ENERGY
THERMAL ENERGY CONVERSION
WATER