Experiments on Oxygen Desorption from Surface Warm Seawater Under Open-cycle Ocean Thermal Energy Conversion (OC-OTEC) Conditions PDF Download
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Author: Ahmad A. Pesaran
Publisher:
ISBN:
Category : Ocean energy resources
Languages : en
Pages : 8
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Book Description
Author: Ahmad A. Pesaran
Publisher:
ISBN:
Category : Ocean energy resources
Languages : en
Pages : 8
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Book Description
Author: Ahmad A. Pesaran
Publisher:
ISBN:
Category : Ocean energy resources
Languages : en
Pages : 0
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Book Description
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 796 to 6096 of dissolved oxygen in the supply water was desorbed from seawater in the predeaerator for pressures ranging from 9 to 3.5 kPa. Bubble injection in the upcomer increased the oxygen desorption rate by 2096 to 6096. 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, 7.596 to 9.596 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.
Author:
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Category : Aeronautics
Languages : en
Pages : 482
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Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 548
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Author:
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ISBN:
Category :
Languages : en
Pages :
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The technical community has questioned the validity and cost-effectiveness of open-cycle ocean thermal energy conversion (OC-OTEC) systems because of the unknown effect of noncondensable gas on heat exchanger performance and the power needed to run vacuum equipment to remove this gas. To date, studies of seawater gas desorption have not been prototypical for system level analysis. This study gives preliminary gas desorption data on a vertical spout, direct contact evaporator and multiple condenser geometries. Results indicate that dissolved gas can be substantially removed before the seawater enters the heat exchange process, reducing the uncertainty and effect of inert gas on heat exchanger performance.
Author: American Society of Mechanical Engineers. Solar Energy Division. Conference
Publisher:
ISBN:
Category : Solar energy
Languages : en
Pages : 448
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Author: Terry R. Penney
Publisher:
ISBN:
Category : Ocean thermal power plants
Languages : en
Pages : 0
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This study gives preliminary gas desorption data on a vertical spout, direct contact evaporator and multiple condenser geometries. Results indicate that dissolved gas can be substantially removed before the seawater enters the heat exchange process, reducing the uncertainty and effect of inert gas on heat exchanger performance.
Author:
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ISBN:
Category : Science
Languages : en
Pages : 1596
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Author:
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Category : Government publications
Languages : en
Pages : 1316
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Author:
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ISBN:
Category : Power (Mechanics)
Languages : en
Pages : 378
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