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Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion (OTEC) Draft Programmaticof ocean thermal energy conversion technology. U.S. Depart~on Ocean TherUial Energy Conversion, June 18, 1979. Ocean

Sands, M.Dale

2013-01-01T23:59:59.000Z

2

Ocean Thermal Extractable Energy Visualization: Final Technical...  

Office of Environmental Management (EM)

Ocean Thermal Extractable Energy Visualization: Final Technical Report Ocean Thermal Extractable Energy Visualization: Final Technical Report Report about the Ocean Thermal...

3

Ocean Thermal Energy Conversion  

Science Journals Connector (OSTI)

A pertinent question, however, is: what is the worldwide power resource that could be extracted with OTEC plants without affecting the thermohaline ocean circulation? The estimate is that the maximum steady-state...

Dr. Luis A. Vega Ph.D.

2013-01-01T23:59:59.000Z

4

Ocean Thermal Energy Conversion  

Science Journals Connector (OSTI)

A pertinent question, however, is: what is the worldwide power resource that could be extracted with OTEC plants without affecting the thermohaline ocean circulation? The estimate is that the maximum steady-state...

Dr. Luis A. Vega Ph.D.

2012-01-01T23:59:59.000Z

5

OCEAN THERMAL ENERGY CONVERSION: AN OVERALL ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

1980. Ocean Thermal Energy Conversion Draft ProgrammaticPlan. Ocean Thermal Energy Conversion. U.S. DOE Assistantl OCEAN THERMAL ENERGY CONVERSION: ENVIRONMENTAL ASSESSMENT

Sands, M.Dale

2013-01-01T23:59:59.000Z

6

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

of ocean thermal energy conversion technology. U.S. DOE.ocean thermal energy conversion. A preliminary engineeringCompany. Ocean thermal energy conversion mission analysis

Sands, M. D.

2011-01-01T23:59:59.000Z

7

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion (OTEC) plants byFifth Ocean Thermal Energy Conversion Conference, February1980. Ocean thermal energy conversion (OTEC) pilot plant

Sullivan, S.M.

2014-01-01T23:59:59.000Z

8

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion ( OTEC) plants byfield of ocean thermal energy conversion discharges. I~. L.Sixth Ocean Thermal Energy conversion Conference. June 19-

Sullivan, S.M.

2014-01-01T23:59:59.000Z

9

Category:Thermal Gradient Holes | Open Energy Information  

Open Energy Info (EERE)

in category "Thermal Gradient Holes" This category contains only the following page. T Thermal Gradient Holes Retrieved from "http:en.openei.orgwindex.php?titleCategory:T...

10

Thermal Gradient Holes | Open Energy Information  

Open Energy Info (EERE)

Thermal Gradient Holes Thermal Gradient Holes Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Thermal Gradient Holes Details Activities (50) Areas (39) Regions (4) NEPA(29) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling Parent Exploration Technique: Exploration Drilling Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Field wide fluid flow characteristics if an array of wells are drilled Thermal: Mapping and projecting thermal anomalies Cost Information Low-End Estimate (USD): 5.00500 centUSD 0.005 kUSD 5.0e-6 MUSD 5.0e-9 TUSD / foot Median Estimate (USD): 16.501,650 centUSD 0.0165 kUSD 1.65e-5 MUSD 1.65e-8 TUSD / foot High-End Estimate (USD): 50.005,000 centUSD

11

Ocean Thermal Energy Conversion LUIS A. VEGA  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion LUIS A. VEGA Hawaii Natural Energy Institute, School of Ocean depths of 20 m (surface water) and 1,000 m. OTEC Ocean Thermal Energy Conversion, the process Energy Conversion. At first, OTEC plantships providing electricity, via submarine power cables, to shore

12

Ocean Thermal Extractable Energy Visualization: Final Technical...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Approved for public release; distribution is unlimited OCEAN THERMAL EXTRACTABLE ENERGY VISUALIZATION Award DE-EE0002664 October 28, 2012 Final Technical Report Prepared by...

13

Ocean Thermal Extractable Energy Visualization: Final Technical Report  

Broader source: Energy.gov [DOE]

Report about the Ocean Thermal Extractable Energy Visualization project, which focuses on assessing the Maximum Practicably Extractable Energy from the world’s ocean thermal resources.

14

Ocean Thermal Gradient Hydraulic Power Plant  

Science Journals Connector (OSTI)

...for the probable life of the earth, only...low-pressure steam turbines pSrhaps hun-dreds...con-ventional hydraulic turbine under gravity flow...horizontally and the remaining available energy...through a hydraulic turbine to generatepower...between the liquid and gas-eous phases, with...

Earl J. Beck

1975-07-25T23:59:59.000Z

15

Assessment of ocean thermal energy conversion  

E-Print Network [OSTI]

Ocean thermal energy conversion (OTEC) is a promising renewable energy technology to generate electricity and has other applications such as production of freshwater, seawater air-conditioning, marine culture and chilled-soil ...

Muralidharan, Shylesh

2012-01-01T23:59:59.000Z

16

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

of an open cycle ocean thermal difference power plant. M.S.screens for ocean thermal energy conversion power plants.1958. Ocean cooling water system for 800 MW power station.

Sands, M. D.

2011-01-01T23:59:59.000Z

17

Thermal Gradient Holes At Coso Geothermal Area (1976) | Open Energy  

Open Energy Info (EERE)

Thermal Gradient Holes At Coso Geothermal Area (1976) Thermal Gradient Holes At Coso Geothermal Area (1976) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Coso Geothermal Area (1976) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date 1976 Usefulness useful DOE-funding Unknown Notes Temperatures have been obtained to depths up to 133 m in 22 boreholes with measurements being made at least four times in each borehole. Geothermal gradients ranged from 240C/km to 450 0C/km. References Combs, J. (1 December 1976) Heat flow determinations and implied thermal regime of the Coso geothermal area, California Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Coso_Geothermal_Area_(1976)&oldid=511217"

18

Thermal Gradient Holes At Long Valley Caldera Geothermal Area...  

Open Energy Info (EERE)

Date 1978 - 1985 Usefulness useful DOE-funding Unknown Exploration Basis Thermal gradient drilling also continued during this period, consisting of several holes including: The...

19

Thermal Gradient Holes At Chena Geothermal Area (EERE, 2010)...  

Open Energy Info (EERE)

EERE, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Chena Geothermal Area (EERE, 2010) Exploration Activity...

20

Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski,...  

Open Energy Info (EERE)

Warpinski, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski, Et Al.,...

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Thermal Gradient Holes At Chena Geothermal Area (Erkan, Et Al...  

Open Energy Info (EERE)

Erkan, Et Al., 2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Chena Geothermal Area (Erkan, Et Al., 2007)...

22

Thermal Gradient Holes At Obsidian Cliff Area (Hulen, Et Al....  

Open Energy Info (EERE)

Obsidian Cliff Area (Hulen, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Obsidian Cliff Area (Hulen,...

23

Thermal Gradient Holes At Glass Mountain Area (Cumming And Mackie...  

Open Energy Info (EERE)

Area (Cumming And Mackie, 2007) Exploration Activity Details Location Glass Mountain Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not...

24

A PRELIMINARY EVALUATION OF IMPINGEMENT AND ENTRAINMENT BY OCEAN THERMAL ENERGY CONVERSION (OTEC) PLANTS  

E-Print Network [OSTI]

Assessment, Ocean Thermal Energy Conversion (OTEC) ProgramOcean Thermal Energy Conversion (OTEC), U.S. Department offor Ocean Thermal Energy Conversion (OTEC) plants. Argonne,

Sullivan, S.M.

2013-01-01T23:59:59.000Z

25

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

screens for ocean thermal energy conversion power plants.cold deep-ocean waters to produce electric power via eitherOffice of Solar Power Applications. Division of Ocean Energy

Sullivan, S.M.

2014-01-01T23:59:59.000Z

26

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

screens for ocean thermal energy conversion power plants.cold deep-ocean waters to produce electric power via eitherpower from the temperature differential between warm surface and cold deep-ocean

Sullivan, S.M.

2014-01-01T23:59:59.000Z

27

Ocean Thermal Energy Conversion Mostly about USA  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion History Mostly about USA 1980's to 1990's and bias towards Vega or other energy carriers to be delivered to shore... 13luisvega@hawaii.edu #12;US Federal Government OTEC period estimated at 3 to 4 years. #12;luisvega@hawaii.edu 20 Energy Carriers · OTEC energy could

28

Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett,  

Open Energy Info (EERE)

Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, 2004) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

29

Ocean Thermal Energy Conversion Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Thermal Energy Conversion Basics Thermal Energy Conversion Basics Ocean Thermal Energy Conversion Basics August 16, 2013 - 4:22pm Addthis A process called ocean thermal energy conversion (OTEC) uses the heat energy stored in the Earth's oceans to generate electricity. OTEC works best when the temperature difference between the warmer, top layer of the ocean and the colder, deep ocean water is about 36°F (20°C). These conditions exist in tropical coastal areas, roughly between the Tropic of Capricorn and the Tropic of Cancer. To bring the cold water to the surface, ocean thermal energy conversion plants require an expensive, large-diameter intake pipe, which is submerged a mile or more into the ocean's depths. Some energy experts believe that if ocean thermal energy conversion can become cost-competitive with conventional power technologies, it could be

30

Ocean Thermal Energy Conversion Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Thermal Energy Conversion Basics Thermal Energy Conversion Basics Ocean Thermal Energy Conversion Basics August 16, 2013 - 4:22pm Addthis A process called ocean thermal energy conversion (OTEC) uses the heat energy stored in the Earth's oceans to generate electricity. OTEC works best when the temperature difference between the warmer, top layer of the ocean and the colder, deep ocean water is about 36°F (20°C). These conditions exist in tropical coastal areas, roughly between the Tropic of Capricorn and the Tropic of Cancer. To bring the cold water to the surface, ocean thermal energy conversion plants require an expensive, large-diameter intake pipe, which is submerged a mile or more into the ocean's depths. Some energy experts believe that if ocean thermal energy conversion can become cost-competitive with conventional power technologies, it could be

31

Chapter 4 - Ocean Thermal Energy Converters  

Science Journals Connector (OSTI)

Publisher Summary The most plentiful renewable energy source on the planet is solar radiation. Harvesting this energy is difficult because of its dilute and erratic nature. Large collecting areas and large storage capacities are needed. These two requirements are satisfied by the tropical oceans. Oceans cover 71% of Earth's surface. In the tropics, they absorb sunlight, and the top layers heat up to some 25°C. Warm surface waters from the equatorial belt flow poleward, melting both the Arctic and the Antarctic ice. The resulting cold waters return to the equator at great depth, completing a huge planetary thermosyphon. Two basic configurations have been proposed for ocean thermal energy converters (OTECs)—those using hydraulic turbines and those using vapor turbines. The first uses the temperature difference between the surface and bottom waters to create a hydraulic head that drives a conventional water turbine. The advantages of this proposal include the absence of heat exchangers. It is easier to find warm surface water than sufficiently cool abyssal waters, which are not readily available in continental shelf regions. This limits the possible sitings of ocean thermal energy converters.

Aldo Vieira da Rosa

2009-01-01T23:59:59.000Z

32

Pumpernickel Valley Geothermal Project Thermal Gradient Wells | Open Energy  

Open Energy Info (EERE)

Valley Geothermal Project Thermal Gradient Wells Valley Geothermal Project Thermal Gradient Wells Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Pumpernickel Valley Geothermal Project Thermal Gradient Wells Details Activities (4) Areas (1) Regions (0) Abstract: The Pumpernickel Valley geothermal project area is located near the eastern edge of the Sonoma Range and is positioned within the structurally complex Winnemucca fold and thrust belt of north-central Nevada. A series of approximately north-northeast-striking faults related to the Basin and Range tectonics are superimposed on the earlier structures within the project area, and are responsible for the final overall geometry and distribution of the pre-existing structural features on the property. Two of these faults, the Pumpernickel Valley fault and Edna Mountain fault,

33

Lockheed Testing the Waters for Ocean Thermal Energy System ...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

today, according to Lockheed Martin. The technology in play: Ocean Thermal Energy Conversion (OTEC). Lockheed Martin is developing a design for an OTEC system that would produce...

34

Thermal power plant efficiency enhancement with Ocean Thermal Energy Conversion  

Science Journals Connector (OSTI)

Abstract In addition to greenhouse gas emissions, coastal thermal power plants would gain further opposition due to their heat rejection distressing the local ecosystem. Therefore, these plants need to enhance their thermal efficiency while reducing their environmental offense. In this study, a hybrid plant based on the principle of Ocean Thermal Energy Conversion was coupled to a 740 MW coal-fired power plant project located at latitude 28°S where the surface to deepwater temperature difference would not suffice for regular OTEC plants. This paper presents the thermodynamical model to assess the overall efficiency gained by adopting an ammonia Rankine cycle plus a desalinating unit, heated by the power plant condenser discharge and refrigerated by cold deep seawater. The simulation allowed us to optimize a system that would finally enhance the plant power output by 25–37 MW, depending on the season, without added emissions while reducing dramatically the water temperature at discharge and also desalinating up to 5.8 million tons per year. The supplemental equipment was sized and the specific emissions reduction was estimated. We believe that this approach would improve the acceptability of thermal and nuclear power plant projects regardless of the plant location.

Rodrigo Soto; Julio Vergara

2014-01-01T23:59:59.000Z

35

Energy from the Oceans: A Small Land Based Ocean Thermal Energy Plant  

Science Journals Connector (OSTI)

This paper describes a small land based closed cycle Ocean Thermal Energy Plant which is being designed ... aquaculture facility and to produce a net electric power output of up to 300 kW. In...

Dr. F. A. Johnson

1990-01-01T23:59:59.000Z

36

Thermal Gradient Holes At Coso Geothermal Area (1974) | Open Energy  

Open Energy Info (EERE)

Coso Geothermal Area (1974) Coso Geothermal Area (1974) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date 1974 Usefulness useful DOE-funding Unknown Exploration Basis Use heat flow studies for the first time at Coso to indicate the presence or absence of abnormal heat Notes Located 10 sites for heat flow boreholes using available seismic ground noise and electrical resistivity data; data collected from 9 of 10; thermal conductivity measurements were completed using both the needle probe technique and the divided bar apparatus with a cell arrangement. In the upper few hundred meters of the subsurface heat is being transferred by a conductive heat transfer mechanism with a value of ~ 15 µcal/cm2sec; the background heat flow is ~ 3.5 HFU.

37

List of Ocean Thermal Incentives | Open Energy Information  

Open Energy Info (EERE)

Thermal Incentives Thermal Incentives Jump to: navigation, search The following contains the list of 96 Ocean Thermal Incentives. CSV (rows 1 - 96) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active Business Energy Investment Tax Credit (ITC) (Federal) Corporate Tax Credit United States Agricultural Commercial Industrial Utility Anaerobic Digestion Biomass CHP/Cogeneration Fuel Cells Fuel Cells using Renewable Fuels Geothermal Direct Use Geothermal Electric Ground Source Heat Pumps Hydroelectric energy Landfill Gas Microturbines Municipal Solid Waste Ocean Thermal Photovoltaics Small Hydroelectric Small Wind Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Water Heat Tidal Energy Wave Energy Wind energy Yes CCEF - Project 150 Initiative (Connecticut) State Grant Program Connecticut Commercial Solar Thermal Electric

38

Thermodynamic Optimization in Ocean Thermal Energy Conversion  

Science Journals Connector (OSTI)

As alternative energy sources to oil and uranium, we can consider well known alternative sources such as solar power, geothermal power and wind power. However when we consider the 21st century energy sources, ocean

Y. Ikegami; H. Uehara

1999-01-01T23:59:59.000Z

39

Thermal Gradient Holes At Socorro Mountain Area (Owens, Et Al., 2005) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Socorro Mountain Area (Owens, Et Al., 2005) Thermal Gradient Holes At Socorro Mountain Area (Owens, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Socorro Mountain Area (Owens, Et Al., 2005) Exploration Activity Details Location Socorro Mountain Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes Pre-existing evidence includes heat gradients of upwards of 490mW/m2 from thermal-gradient wells, tepid spring waters (32oC) and silica geochemistry indicating thermal waters with a minimum of 82 degrees C at depth References Lara Owens, Richard Baars, David Norman, Harold Tobin (2005) New Methods In Exploration At The Socorro Peak Kgra- A Gred Iii Project Retrieved from

40

E. Guilyardi G. Madec L. Terray The role of lateral ocean physics in the upper ocean thermal balance  

E-Print Network [OSTI]

. As this gradient is proportional to the isopycnal gradient of salinity, this con®rms the strong role of salinity of diusion and to the sign of the isopycnal gradients of temperature at the base of the bowl to the existence of a salinity structure. The lateral ocean physics is shown to be a signi®cant contributor

Guilyardi, Eric

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Thermal Gradient Holes At Hualalai Northwest Rift Area (Thomas, 1986) |  

Open Energy Info (EERE)

Hualalai Northwest Rift Hualalai Northwest Rift Area (Thomas, 1986) Exploration Activity Details Location Hualalai Northwest Rift Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes Although not part of the current effort, two deep (approximately 2000 m) exploratory wells were drilled on the north flank of Hualalai near Puu Waawaa cinder cone. The geophysical data used for siting these wells were proprietary and hence unavailable for publication; however, the temperatures measured at the bottoms of the wells were reported to be below 20degrees C. Chemical analysis of water samples taken from these wells did not provide useful geothermal data due to contamination of the well water with drilling muds References Donald M. Thomas (1 January 1986) Geothermal Resources Assessment In

42

Thermal Gradient Holes At Fort Bliss Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Fort Bliss Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Fort Bliss Area (DOE GTP) Exploration...

43

Countermeasures to Microbiofouling in Simulated Ocean Thermal Energy Conversion Heat Exchangers with Surface and Deep Ocean Waters in Hawaii  

Science Journals Connector (OSTI)

...thermal energy from warm ocean waters. A small fraction...converted to electrical power and waste heat is rejected...water pumped from the ocean depth. Solar energy absorbed by the ocean surface provides the heat...Thermal losses, the power requirements to pump large...

Leslie Ralph Berger; Joyce A. Berger

1986-06-01T23:59:59.000Z

44

Ocean Thermal Power for Hydrogen Production  

Science Journals Connector (OSTI)

Roughly three-fourths of the earth’s surface is covered by the oceans and thus receives the major share of the Sun’s radiant energy falling on the planet. Allowing for the loss of part of this energy income by...

M. V. C. Sastri

1987-01-01T23:59:59.000Z

45

Technical and economic feasibility of a Thermal Gradient Utilization Cycle (TGUC) power plant  

E-Print Network [OSTI]

has grown in energy technologies that use renewable resources such as solar (thermal conversion, ocean thermal energy conversion, photovoltaics, wind and biomass conversion), geothermal and magnetohydrodynamics (MHD) . A new concept that can...

Raiji, Ashok

1980-01-01T23:59:59.000Z

46

OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORT FOR THE NOVEMBER 1977 GOTEC-02 CRUISE TO THE GULF OF MEXICO MOBILE SITE  

E-Print Network [OSTI]

02 OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORTto potential Ocean Thermal Energy Conversion (OTEC) sites inOcean Thermal Energy Conversion (OTEC) Sites: Puerto Rico,

Commins, M.L.

2010-01-01T23:59:59.000Z

47

Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Exploration Activity Details Location Hot Springs Ranch Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes In 2005, Nevada Geothermal Power Company drilled four geothermal gradient wells, PVTG-1, -2, -3, and -4, and all four encountered geothermal fluids. The holes provided valuable water geochemistry, supporting the geothermometry results obtained from the hot springs and Magma well. The temperature data gathered from all the wells clearly indicates the presence of a major plume of thermal water centered on the Pumpernickel Valley

48

Assessment of Microbial Fouling in an Ocean Thermal Energy Conversion Experiment  

Science Journals Connector (OSTI)

...Press Inc., New York. 14. Hirshman...Ocean Thermal Energy Conversion...Press Inc., New York. 24. Mathis...Ocean thermal energy: the biggest...Department of Energy, part II. U...Pergamon Press, New York. 28. Perrigo...

R. Paul Aftring; Barrie F. Taylor

1979-10-01T23:59:59.000Z

49

2007 Survey of Energy Resources World Energy Council 2007 Ocean Thermal Energy Conversion COUNTRY NOTES  

E-Print Network [OSTI]

2007 Survey of Energy Resources World Energy Council 2007 Ocean Thermal Energy Conversion 573 and personal communication. Valuable inputs were provided by Don Lennard of Ocean Thermal Energy Conversion in the technology. #12;2007 Survey of Energy Resources World Energy Council 2007 Ocean Thermal Energy Conversion 574

50

Assessment of Microbial Fouling in an Ocean Thermal Energy Conversion Experiment  

Science Journals Connector (OSTI)

...Proceedings of the Ocean Thermal Energy Conversion...Claude, G. 1930. Power from the tropical seas...Metz, W. D. 1977. Ocean thermal energy: the biggest gamble in solar power. Science 198:178-180...studies, p. 1-53. In Ocean Thermal Energy Conversion...

R. Paul Aftring; Barrie F. Taylor

1979-10-01T23:59:59.000Z

51

Thermal Gradient Holes At Salt Wells Area (Bureau of Land Management, 2009)  

Open Energy Info (EERE)

Thermal Gradient Holes At Salt Wells Area (Bureau of Land Management, 2009) Thermal Gradient Holes At Salt Wells Area (Bureau of Land Management, 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Salt Wells Area (Bureau of Land Management, 2009) Exploration Activity Details Location Salt Wells Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date 2008 - 2008 Usefulness not indicated DOE-funding Unknown Exploration Basis Vulcan increased exploration efforts in the summer and fall of 2008, during which time the company drilled two temperature gradient holes (86-15 O on Pad 1 and 17-16 O on Pad 3); conducted seismic, gravity and magnetotelluric surveys; and drilled deep exploration wells at Pads 6 and 8 and binary wells at Pads 1, 2, 4, and 7. Notes

52

Thermal Gradient Holes At Lightning Dock Area (Cunniff & Bowers, 2005) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Lightning Dock Area Thermal Gradient Holes At Lightning Dock Area (Cunniff & Bowers, 2005) Exploration Activity Details Location Lightning Dock Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The two gradient holes were sited on federal geothermal leases owned by Lightning Dock Geothermal, Inc. and both were drilled into lakebed sediments some distance from the intense shallow geothermal anomaly located in the eastern half of Section 7, Township 25 South, Range 19 West. References Roy A. Cunniff, Roger L. Bowers (2005) Final Technical Report, Geothermal Resource Evaluation And Definitioni (Gred) Program-Phases I, Ii, And Iii For The Animas Valley, Nm Geothermal Resource Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Lightning_Dock_Area_(Cunniff_%26_Bowers,_2005)&oldid=387460"

53

Thermal Gradient Holes At Blue Mountain Area (Fairbank & Neggemann, 2004) |  

Open Energy Info (EERE)

Blue Mountain Area (Fairbank & Neggemann, 2004) Blue Mountain Area (Fairbank & Neggemann, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Blue Mountain Area (Fairbank & Neggemann, 2004) Exploration Activity Details Location Blue Mountain Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown References Brian D. Fairbank, Kim V. Niggemann (2004) Deep Blue No 1- A Slimhole Geothermal Discovery At Blue Mountain, Humboldt County, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Blue_Mountain_Area_(Fairbank_%26_Neggemann,_2004)&oldid=386709" Category: Exploration Activities What links here Related changes Special pages Printable version Permanent link

54

Thermal Gradient Holes At Kilauea East Rift Area (Thomas, 1986) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Kilauea East Rift Area (Thomas, 1986) Thermal Gradient Holes At Kilauea East Rift Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Kilauea East Rift Area (Thomas, 1986) Exploration Activity Details Location Kilauea East Rift Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes Two separate phases of geothermal exploratory drilling have occurred on the lower East Rift. The first was essentially a wildcat venture with relatively little surface exploratory data having been gathered, whereas the second was initiated after somewhat more geoscience information had been acquired under the Hawaii Geothermal Project. The results of the successful exploratory drilling program on the Kilauea

55

Thermal Gradient Holes At Kilauea Summit Area (Keller, Et Al., 1979) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Kilauea Summit Area (Keller, Et Al., 1979) Thermal Gradient Holes At Kilauea Summit Area (Keller, Et Al., 1979) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Kilauea Summit Area (Keller, Et Al., 1979) Exploration Activity Details Location Kilauea Summit Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes A deep borehole was drilled at the summit of Kilauea volcano, Hawaii, between April 6 and July 9, 1973. The hole is located approximately 1 km south of the edge of Halemaumau crater (Figs. 1 and 2), a crater within the summit caldera of the volcano. The total depth of the hole is 1262 m (4141 ft) measured from the derrick floor at an altitude of 1102 m (3616 ft). A description of the drilling program and some of the results obtained have

56

Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) Exploration Activity Details Location Crump's Hot Springs Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes 8 wells References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Crump%27s_Hot_Springs_Area_(DOE_GTP)&oldid=402699"

57

Thermal Gradient Holes At Twenty-Nine Palms Area (Sabin, Et Al., 2010) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Twenty-Nine Palms Area (Sabin, Et Al., 2010) Thermal Gradient Holes At Twenty-Nine Palms Area (Sabin, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Twenty-Nine Palms Geothermal Area (Sabin, Et Al., 2010) Exploration Activity Details Location Twenty-Nine Palms Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes The first and only Seabee drilling project was the installation of five TGHs at the Camp Wilson region of the MCAGCC Marine base near Twenty-Nine Palms, CA. While the program was a success and GPO identified an anomaly where a deep, slim hole is to be drilled in June, 2010, the Seabee rig was sent oversees soon after drilling was completed. If/when another rig

58

Thermal Gradient Holes At Fish Lake Valley Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Thermal Gradient Holes At Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Fish Lake Valley Area (DOE GTP) Exploration Activity Details Location Fish Lake Valley Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes 2 wells References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Fish_Lake_Valley_Area_(DOE_GTP)&oldid=511222" Categories:

59

Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

60

Integrated thermal-microstructure model to predict the property gradients in resistance spot steel welds  

SciTech Connect (OSTI)

An integrated model approach was proposed for relating resistance welding parameters to weldment properties. An existing microstructure model was used to determine the microstructural and property gradients in resistance spot welds of plain carbon steel. The effect of these gradients on the weld integrity was evaluated with finite element analysis. Further modifications to this integrated thermal-microstructure model are discussed.

Babu, S.S.; Riemer, B.W.; Santella, M.L. [Oak Ridge National Lab., TN (United States); Feng, Z. [Edison Welding Inst., Columbus, OH (United States)

1998-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Chapter 7 - Geothermal and ocean-thermal energy conversion  

Science Journals Connector (OSTI)

Publisher Summary Geothermal heat sources are utilized by means of thermodynamic engines such as Brayton cycles, in cases where the geothermal heat is in the form of steam. In some regions, geothermal sources exist that provide a mixture of water and steam, including suspended soil and rock particles, such that conventional turbines cannot be used. In most regions the geothermal resources are in the form of heat-containing rock or sediments, with little possibility of direct use. If an aquifer passes through the region, it may collect heat from the surrounding layers and allow a substantial rate of heat extraction such as by drilling two holes from the surface to the aquifer, separated from each other. If no aquifer is present to establish a heat exchange surface in the heat-containing rock, it may be feasible to create suitable fractures artificially. Downward gradients of temperature exist in most oceans, and they are particularly stable in the tropical oceans. The utilization of such temperature gradients for electricity generation such as by use of a Rankine cycle, are considered several times. The temperature differences available over the first 500-1000 m of water depth are only about 25?C. Considering a closed Rankine cycle, with a working fluid such as ammonia, which evaporates and condenses at convenient temperatures, placed near the ocean surface, it will be required to pump colder water through a pipe from the depth to a heat exchanger for condensation of the working fluid. A warm water heat exchanger is required for evaporating the working fluid. The converters must be placed in strong currents such as the Gulf Stream in order to save energy to pump the hot water through the heat exchanger.

Bent Sørensen

2007-01-01T23:59:59.000Z

62

Ocean thermal plantships for production of ammonia as the hydrogen carrier.  

SciTech Connect (OSTI)

Conventional petroleum, natural gas, and coal are the primary sources of energy that have underpinned modern civilization. Their continued availability in the projected quantities required and the impacts of emission of greenhouse gases (GHGs) on the environment are issues at the forefront of world concerns. New primary sources of energy are being sought that would significantly reduce the emissions of GHGs. One such primary source that can help supply energy, water, and fertilizer without GHG emissions is available in the heretofore unexploited thermal gradients of the tropical oceans. The world's oceans are the largest natural collector and reservoir of solar energy. The potential of ocean energy is limitless for producing base-load electric power or ammonia as the hydrogen carrier and fresh water from seawater. However, until now, ocean energy has been virtually untapped. The general perception is that ocean thermal energy is limited to tropical countries. Therefore, the full potential of at-sea production of (1) ammonia as a hydrogen carrier and (2) desalinated water has not been adequately evaluated. Using ocean thermal plantships for the at-sea co-production of ammonia as a hydrogen carrier and desalinated water offer potential energy, environmental, and economic benefits that support the development of the technology. The introduction of a new widespread solution to our projected energy supply requires lead times of a decade or more. Although continuation of the ocean thermal program from the 1970s would likely have put us in a mitigating position in the early 2000s, we still have a window of opportunity to dedicate some of our conventional energy sources to the development of this renewable energy by the time new sources would be critically needed. The primary objective of this project is to evaluate the technical and economic viability of ocean thermal plantships for the production of ammonia as the hydrogen carrier. This objective is achieved by completing project tasks that consist of updating the John Hopkins University/Applied Physics Laboratory (JHU/APL) pilot plantship design and extrapolating it to commercial plantships, evaluating a new energy-efficient ammonia synthesis process, evaluating the co-production of desalinated water on plantships, and developing a conceptual design of a satellite plantships system for commercial-scale ammonia production. In addition, an industrial workshop was organized to present the results and develop future goals for commercialization of ocean thermal plantships by 2015. The following goals, arranged in chronological order, were examined at the workshop: (1) Global displacement of petroleum-fuel-based (diesel, fuel oil, naphtha) power generation for freeing up these fuels for transportation, chemical feedstock, and other high-valued uses; (2) At-sea production of desalinated water for regions of critical water shortages; (3) Displacement of carbon-based feed stocks and energy for production of ammonia fertilizers; (4) Development of hydrogen supply to allow economic processing of heavy crude oils and upgrading oil sands; (5) Development of ammonia-fueled distributed energy to displace natural-gas fueled power generation to free up natural gas for higher-value uses and the mitigation of issues associated with imported liquefied natural gas (LNG); and (6) Use of ammonia as a hydrogen carrier for transportation.

Panchal, C.B.; Pandolfini, P. P.; Kumm, W. H.; Energy Systems; Johns Hopkins Univ.; Arctic Energies, Ltd.

2009-12-02T23:59:59.000Z

63

Thermal Gradient Holes At Chocolate Mountains Area (Alm, Et Al., 2010) |  

Open Energy Info (EERE)

Chocolate Mountains Area (Alm, Et Al., 2010) Chocolate Mountains Area (Alm, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Chocolate Mountains Area (Alm, Et Al., 2010) Exploration Activity Details Location Chocolate Mountains Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes "Shallow temperature gradient drilling began at the CMAGR in January of 2010. 13 temperature gradient holes were completed to a depth of 500' below ground surface. Sites were selected based on the compilation of previous exploration and resulting data is being integrated into the most recent geologic model. This model will form the basis for the selection of a deeper (2000'-4000') temperature gradient drilling campaign at the CMAGR in

64

Thermal Gradient Holes At Hawthorne Area (Lazaro, Et Al., 2010) | Open  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Thermal Gradient Holes At Hawthorne Area (Lazaro, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Hawthorne Area (Lazaro, Et Al., 2010) Exploration Activity Details Location Hawthorne Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes The Navy recently completed a temperature gradient hole (TGH) drilling campaign. Results suggest multiple resources may exist on HAD lands. To further define the shallow resource, the Navy will drill one or two

65

Thermal Gradient Holes At Twenty-Nine Palms Area (Page, Et Al., 2010) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Twenty-Nine Palms Thermal Gradient Holes At Twenty-Nine Palms Geothermal Area (Page, Et Al., 2010) Exploration Activity Details Location Twenty-Nine Palms Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes From November 2008 to March 2009, Seabees from the Naval Construction Division (NCD) successfully completed fivetemperature gradient holes for the GPO. Samples taken from each hole were similar in nature; mixtures of sand and conglomerates with the occasional granite sections were typically encountered. Each hole varied slightly in depth, ranging from 600ft to 1,000ft; however, each hole has been completed to acceptable standards of the GPO. Upon completion of drilling, 3" metal tubing was inserted to

66

Thermal Gradient Holes At Lightning Dock Area (Warpinski, Et Al., 2004) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Lightning Dock Area Thermal Gradient Holes At Lightning Dock Area (Warpinski, Et Al., 2004) Exploration Activity Details Location Lightning Dock Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The awardee conducted seismic, gravity, resistivity, and airborne magnetic surveys, drilled temperature-gradient wells, and selected a location for a test well (52-7). The test well was drilled to a total depth of 770 m during 2003. Maximum temperatures approached 140degrees C and a short flow test suggested that a production well could be drilled to 600 m and produce economic volumes of 130-140degrees C fluid. A final assessment of the resource is currently being performed. References N. R. Warpinski, A. R. Sattler, R. Fortuna, D. A. Sanchez, J.

67

Thermal Gradient Holes At Breitenbush Hot Springs Area (Ingebritsen...  

Open Energy Info (EERE)

(1993) Heat Flow From Four New Research Drill Holes In The Western Cascades, Oregon, Usa Additional References Retrieved from "http:en.openei.orgwindex.php?titleThermalGr...

68

Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit & Blackwell,  

Open Energy Info (EERE)

Hot Creek Ranch Area (Benoit & Blackwell, Hot Creek Ranch Area (Benoit & Blackwell, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Exploration Activity Details Location Upper Hot Creek Ranch Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes Ten temperature gradient holes up to 500' deep were initially planned but higher than anticipated drilling and permitting costs within a fixed budget reduced the number of holes to five. Four of the five holes drilled to depths of 300 to 400' encountered temperatures close to the expected regional thermal background conditions. These four holes failed to find any evidence of a large thermal anomaly surrounding the UHCR hot springs. The

69

Thermal rectification and negative differential thermal resistance in lattices with mass gradient Nuo Yang,1 Nianbei Li,1 Lei Wang,1 and Baowen Li1,2,  

E-Print Network [OSTI]

Thermal rectification and negative differential thermal resistance in lattices with mass gradient thermal resistance is observed. Possible applications in constructing thermal rectifiers and thermal properties, the thermal properties of graded materials have not yet been fully studied see the recent review

Li, Baowen

70

Thermal Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) |  

Open Energy Info (EERE)

Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

71

Thermal Gradient Holes At Chocolate Mountains Area (Sabin, Et Al., 2010) |  

Open Energy Info (EERE)

Thermal Gradient Holes At Chocolate Mountains Area Thermal Gradient Holes At Chocolate Mountains Area (Sabin, Et Al., 2010) Exploration Activity Details Location Chocolate Mountains Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes In lieu of Seabee TGH drilling, GPO awarded a large IDIQ TGH drilling contract in December, 2009. Over the next two years, 90 500-ft TGHs will be installed at select sites in California and Nevada. Interim data from this campaign are already available for the Chocolate Mountains and Hawthorne. Results of these programs can be found in the Chocolate Mountains and Hawthorne papers also available in this volume. References Andrew Sabin, S. Bjornstad, M. Lazaro, D. Meade, C. Page, S. Alm, A. Tiedeman, W. C. Huang (2010) Navy's Geothermal Program Office: Overview

72

Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski, Et Al.,  

Open Energy Info (EERE)

2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski, Et Al., 2004) Exploration Activity Details Location Lake City Hot Springs Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The Lake City site, which is located in far northeastern California, consists of a previously identified geothermal site that has been explored with both geophysics and drilling (Hedel, 1981), but has not been characterized adequately to allow accurate siting or drilling of production wells. Some deep wells, several seismic lines, limited gravity surveys, and geochemical and geological studies have suggested that the geothermal

73

Assessment of Microbial Fouling in an Ocean Thermal Energy Conversion Experiment  

Science Journals Connector (OSTI)

...publication 23 July 1979 A project to investigate biofouling...to ocean thermal energy conversion heat exchangers...in ocean thermal energy conversion heat exchangers...for man to harvest solar energy involves exploitation...exchanger units. The project was conducted from...

R. Paul Aftring; Barrie F. Taylor

1979-10-01T23:59:59.000Z

74

Ocean Thermal Energy Conversion (OTEC) A New Secure Renewable Energy Source  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion (OTEC) A New Secure Renewable Energy Source For Defense Water Temperature Delta 2 A New Clean Renewable 24/7 Energy Source #12;Ocean Thermal Energy Conversion and Commercial Applications 1 Dr. Ted Johnson Director of Alternative Energy Programs Development Lockheed Martin

75

Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters  

Broader source: Energy.gov [DOE]

Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters

76

Thermal Gradient Holes At Hawthorne Area (Sabin, Et Al., 2010) | Open  

Open Energy Info (EERE)

Sabin, Et Al., 2010) Sabin, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Hawthorne Area (Sabin, Et Al., 2010) Exploration Activity Details Location Hawthorne Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes In lieu of Seabee TGH drilling, GPO awarded a large IDIQ TGH drilling contract in December, 2009. Over the next two years, 90 500-ft TGHs will be installed at select sites in California and Nevada. Interim data from this campaign are already available for the Chocolate Mountains and Hawthorne. Results of these programs can be found in the Chocolate Mountains and Hawthorne papers also available in this volume. References Andrew Sabin, S. Bjornstad, M. Lazaro, D. Meade, C. Page, S. Alm, A.

77

Thermal Gradient Holes At Walker-Lane Transitional Zone Region (Pritchett,  

Open Energy Info (EERE)

Walker-Lane Transitional Zone Region (Pritchett, Walker-Lane Transitional Zone Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Walker-Lane Transitional Zone Region (Pritchett, 2004) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

78

Thermal Gradient Holes At Cove Fort Area (Warpinski, Et Al., 2002) | Open  

Open Energy Info (EERE)

Et Al., 2002) Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Cove Fort Area (Warpinski, Et Al., 2002) Exploration Activity Details Location Cove Fort Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The project at Cove Fort/Sulphurdale in Utah, T26S R6/7W, is concerned with locating and drilling a 900-meter well to explore the western extension of the Cove Fort-Sulphurdale geothermal area. The geophysical exploration consisted of resistivity, ground magnetic, and microgravity surveys that were made to site the well in an optimum location. Drilling of the test well was completed in the fall of 2001 and results are currently being evaluated. The total depth of the well is 598 m with a

79

Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al.,  

Open Energy Info (EERE)

Hot Springs Area (Shevenell, Et Al., Hot Springs Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Spencer Hot Springs Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes Collaboration with the gold mining industry has brought two new geothermal discoveries to the attention of the geothermal community. Exploration holes at Tungsten Mountain and McGuiness Hills (Spencer Hot Springs?) in 2004 and 2005 encountered hot water and steam at depths of meters with fluid geothermometry indicating reservoir temperatures of 170 to 200oC. More information can be obtained from the Nevada Bureau of Mines and Geology web

80

Thermal Gradient Holes At Fort Bidwell Area (Lafleur, Et Al., 2010) | Open  

Open Energy Info (EERE)

Bidwell Area (Lafleur, Et Al., 2010) Bidwell Area (Lafleur, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Fort Bidwell Area (Lafleur, Et Al., 2010) Exploration Activity Details Location Fort Bidwell Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes "Four wells have been successfully drilled into this resource since the early 1980s using a combination of funds provided by the California Energy Commission (CEC) and the United State Department of Energy (USDOE). The first three wells, FB-1, -2 and -3 have been discussed in a previous paper (Barker et al., 2005). The current status of the FBIC project to evaluate the potential geothermal resource under the reservation is that a deep

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Response of oceanic hydrate-bearing sediments to thermal stresses  

E-Print Network [OSTI]

are often observed in unconsolidated oceanic sediments11.wellbore assembly if a weak unconsolidated porous medium isevidence, because of the unconsolidated, unlithified nature

Moridis, G.J.; Kowalsky, M.B.

2006-01-01T23:59:59.000Z

82

Potential environmental consequences of ocean thermal energy conversion (OTEC) plants. A workshop  

SciTech Connect (OSTI)

The concept of generating electrical power from the temperature difference between surface and deep ocean waters was advanced over a century ago. A pilot plant was constructed in the Caribbean during the 1920's but commercialization did not follow. The US Department of Energy (DOE) earlier planned to construct a single operational 10MWe Ocean Thermal Energy Conversion (OTEC) plant by 1986. However, Public Law P.L.-96-310, the Ocean Thermal Energy Conversion Research, Development and Demonstration Act, and P.L.-96-320, the Ocean Thermal Energy Conversion Act of 1980, now call for acceleration of the development of OTEC plants, with capacities of 100 MWe in 1986, 500 MWe in 1989, and 10,000 MWe by 1999 and provide for licensing and permitting and loan guarantees after the technology has been demonstrated.

Walsh, J.J. (ed.)

1981-05-01T23:59:59.000Z

83

Economics of Ocean Thermal Energy Conversion Luis A. Vega, Ph.D.  

E-Print Network [OSTI]

Economics of Ocean Thermal Energy Conversion (OTEC) by Luis A. Vega, Ph.D. Published and 100 MW Plants 15 Co-Products of OTEC 16 OTEC Energy Carriers 19 Externalities in the Production Thermal Energy Conversion (OTEC) Luis A. Vega, Ph.D.1, 2 Abstract A straightforward analytical model

84

Thermal gradient crystals as tuneable monochromator for high energy X-rays  

SciTech Connect (OSTI)

At the high energy synchrotron radiation beamline BW5 at DORIS III at DESY a new monochromator providing broad energy bandwidth and high reflectivity is in use. On a small 10x10x5 mm{sup 3} silicon crystal scattering at the (311) reflection a thermal gradient is applied, which tunes the scattered energy bandwidth. The (311) reflection strongly suppresses the higher harmonics allowing the use of an image plate detector for crystallography. The monochromator can be used at photon energies above 60 keV.

Ruett, U.; Schulte-Schrepping, H.; Heuer, J.; Zimmermann, M. von [Hamburger Synchrotron Strahlungslabor (HASYLAB), at Deutsches Elektronensychrotron (DESY), Notkestr. 85, 22603 Hamburg (Germany)

2010-06-23T23:59:59.000Z

85

Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski, Et Al., 2002)  

Open Energy Info (EERE)

2) 2) Exploration Activity Details Location Cove Fort Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The project at Cove Fort/Sulphurdale in Utah, T26S R6/7W, is concerned with locating and drilling a 900-meter well to explore the western extension of the Cove Fort-Sulphurdale geothermal area. The geophysical exploration consisted of resistivity, ground magnetic, and microgravity surveys that were made to site the well in an optimum location. Drilling of the test well was completed in the fall of 2001 and results are currently being evaluated. The total depth of the well is 598 m with a non-equilibrated maximum temperature probably in the range of 157degrees C and a very complicated geologic structure.

86

Thermal Gradient Holes At Tungsten Mountain Area (Kratt, Et Al., 2008) |  

Open Energy Info (EERE)

Kratt, Et Al., 2008) Kratt, Et Al., 2008) Exploration Activity Details Location Tungsten Mountain Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes twenty-three gold exploration holes were drilled by Newcrest Resources, Inc. during 2005 and 2006 along the range front. These holes approached or exceeded 300 m in depth and all holes encountered hot water and/or steam. Despite the high temperatures encountered at relatively shallow depths, there are no active geothermal features such as hot springs or steam vents at the surface. The presence of small outcrops of argillic alteration containing anomalous gold attracted the interest of exploration geologists. References Christopher Kratt, Mark Coolbaugh, Chris Sladek, Rick Zehner, Robin

87

Thermal Gradient Holes At Chena Area (Erkan, Et. Al., 2008) | Open Energy  

Open Energy Info (EERE)

Chena Area (Erkan, Et. Al., Chena Area (Erkan, Et. Al., 2008) Exploration Activity Details Location Chena Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes MULTI-STAGE DRILLING Once a hole is drilled the natural-state pressure distribution with depth is essentially unrecoverable (Grant et al., 1982). One of the best ways to mitigate this effect is to use multi-stage drilling (White et al., 1975; Grant et al., 1982). This type of drilling was applied at Chena and its usefulness in understanding the natural flow regimes is demonstrated. Here, we illustrate how high-quality equilibrium temperature logs can often be used to identify permeable fractures. The independent interpretations of flow regimes based on temperature-depth curves and the

88

Thermal Gradient Holes At Tungsten Mountain Area (Shevenell, Et Al., 2008)  

Open Energy Info (EERE)

Shevenell, Et Al., 2008) Shevenell, Et Al., 2008) Exploration Activity Details Location Tungsten Mountain Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes Collaboration with the gold mining industry has brought two new geothermal discoveries to the attention of the geothermal community. Exploration holes at Tungsten Mountain and McGuiness Hills (Figure 1) in 2004 and 2005 encountered hot water and steam at depths of meters with fluid geothermometry indicating reservoir temperatures of 170 to 200oC. More information can be obtained from the Nevada Bureau of Mines and Geology web site (www.nbmg.unr.edu/geothermal/gtmap.pdf), and from a PowerPoint presentation titled 'Geothermal Exploration Short Stories' posted on the Geothermal Resources Council web site

89

Evidence of Magnetic Breakdown on the Defects With Thermally Suppressed Critical Field in High Gradient SRF Cavities  

SciTech Connect (OSTI)

At SRF 2011 we presented the study of quenches in high gradient SRF cavities with dual mode excitation technique. The data differed from measurements done in 80's that indicated thermal breakdown nature of quenches in SRF cavities. In this contribution we present analysis of the data that indicates that our recent data for high gradient quenches is consistent with the magnetic breakdown on the defects with thermally suppressed critical field. From the parametric fits derived within the model we estimate the critical breakdown fields.

Eremeev, Grigory [JLAB; Palczewski, Ari [JLAB

2013-09-01T23:59:59.000Z

90

Heart transport by currents and thermal balance of the south-eastern Indian Ocean active layer  

Science Journals Connector (OSTI)

The paper shows that, by virtue of the specific water circulation in the south-eastern Indian Ocean, thermal influx within the 0–200 m layer exceeds the efflux by 13.5×1015 MJ per year, which, being recalculated ...

V. F. Sukhovey; B. V. Baskaran

1996-01-01T23:59:59.000Z

91

Ocean Thermal Energy Conversion Primer L. A. Vega, Ph.D.  

E-Print Network [OSTI]

source and the heat sink required for a heat engine. A practical application is found in a system (heat engine) designed to transform the thermal energy into electricity. This is referred to as OTEC for Ocean seawater is flash-evaporated in a vacuum chamber. The resulting low-pressure steam is used to drive

92

Faster Time Response by the Use of Wire Electrodes in Capacitive Salinity Gradient Energy Systems  

Science Journals Connector (OSTI)

Comparing salinity gradient power to other ocean power sources, such as wind, ocean currents, wave, tidal streams, and thermal gradients, it is supreme partly in that it has the second largest power potential, but foremost because it is focused at river deltas (rather than being distributed over the ocean areas across the world). ... We also studied the asymmetric behavior of response time in concentrated saline solution and dilute saline solution that is reported for our branch of technologies. ... solns. of different salinities. ...

Odne S. Burheim; Fei Liu; Bruno B. Sales; Olivier Schaetzle; Cees J. N. Buisman; Hubertus V. M. Hamelers

2012-08-28T23:59:59.000Z

93

Thermally-assisted-occupation density functional theory with generalized-gradient approximations  

SciTech Connect (OSTI)

We extend the recently proposed thermally-assisted-occupation density functional theory (TAO-DFT) [J.-D. Chai, J. Chem. Phys. 136, 154104 (2012)] to generalized-gradient approximation (GGA) exchange-correlation density functionals. Relative to our previous TAO-LDA (i.e., the local density approximation to TAO-DFT), the resulting TAO-GGAs are significantly superior for a wide range of applications, such as thermochemistry, kinetics, and reaction energies. For noncovalent interactions, TAO-GGAs with empirical dispersion corrections are shown to yield excellent performance. Due to their computational efficiency for systems with strong static correlation effects, TAO-LDA and TAO-GGAs are applied to study the electronic properties (e.g., the singlet-triplet energy gaps, vertical ionization potentials, vertical electron affinities, fundamental gaps, and symmetrized von Neumann entropy) of acenes with different number of linearly fused benzene rings (up to 100), which is very challenging for conventional electronic structure methods. The ground states of acenes are shown to be singlets for all the chain lengths studied here. With the increase of acene length, the singlet-triplet energy gaps, vertical ionization potentials, and fundamental gaps decrease monotonically, while the vertical electron affinities and symmetrized von Neumann entropy (i.e., a measure of polyradical character) increase monotonically.

Chai, Jeng-Da, E-mail: jdchai@phys.ntu.edu.tw [Department of Physics, Center for Theoretical Sciences, and Center for Quantum Science and Engineering, National Taiwan University, Taipei 10617, Taiwan (China)] [Department of Physics, Center for Theoretical Sciences, and Center for Quantum Science and Engineering, National Taiwan University, Taipei 10617, Taiwan (China)

2014-05-14T23:59:59.000Z

94

Particle Swarm Optimization and Gradient Descent Methods for Optimization of PI Controller for AGC of Multi-area Thermal-Wind-Hydro Power Plants  

Science Journals Connector (OSTI)

The automatic generation control (AGC) of three unequal interconnected Thermal, Wind and Hydro power plant has been designed with PI controller. Further computational intelligent technique Particle Swarm Optimization and conventional Gradient Descent ... Keywords: Automatic generation control, Particle swarm optimization, Gradient Descent method, Generation rate constraint, Area control error, Wind energy conversion system

Naresh Kumari; A N. Jha

2013-04-01T23:59:59.000Z

95

Ocean Thermal Energy Conversion Life Cycle Cost Assessment, Final Technical Report, 30 May 2012  

SciTech Connect (OSTI)

The Ocean Thermal Energy Conversion (OTEC) Life Cycle Cost Assessment (OLCCA) is a study performed by members of the Lockheed Martin (LM) OTEC Team under funding from the Department of Energy (DOE), Award No. DE-EE0002663, dated 01/01/2010. OLCCA objectives are to estimate procurement, operations and maintenance, and overhaul costs for two types of OTEC plants: -Plants moored to the sea floor where the electricity produced by the OTEC plant is directly connected to the grid ashore via a marine power cable (Grid Connected OTEC plants) -Open-ocean grazing OTEC plant-ships producing an energy carrier that is transported to designated ports (Energy Carrier OTEC plants) Costs are developed using the concept of levelized cost of energy established by DOE for use in comparing electricity costs from various generating systems. One area of system costs that had not been developed in detail prior to this analysis was the operations and sustainment (O&S) cost for both types of OTEC plants. Procurement costs, generally referred to as capital expense and O&S costs (operations and maintenance (O&M) costs plus overhaul and replacement costs), are assessed over the 30 year operational life of the plants and an annual annuity calculated to achieve a levelized cost (constant across entire plant life). Dividing this levelized cost by the average annual energy production results in a levelized cost of electricity, or LCOE, for the OTEC plants. Technical and production efficiency enhancements that could result in a lower value of the OTEC LCOE were also explored. The thermal OTEC resource for Oahu, Hawai�¢����i and projected build out plan were developed. The estimate of the OTEC resource and LCOE values for the planned OTEC systems enable this information to be displayed as energy supplied versus levelized cost of the supplied energy; this curve is referred to as an Energy Supply Curve. The Oahu Energy Supply Curve represents initial OTEC deployment starting in 2018 and demonstrates the predicted economies of scale as technology and efficiency improvements are realized and larger more economical plants deployed. Utilizing global high resolution OTEC resource assessment from the Ocean Thermal Extractable Energy Visualization (OTEEV) project (an independent DOE project), Global Energy Supply Curves were generated for Grid Connected and Energy Carrier OTEC plants deployed in 2045 when the predicted technology and efficiencies improvements are fully realized. The Global Energy Supply Curves present the LCOE versus capacity in ascending order with the richest, lowest cost resource locations being harvested first. These curves demonstrate the vast ocean thermal resource and potential OTEC capacity that can be harvested with little change in LCOE.

Martel, Laura; Smith, Paul; Rizea, Steven; Van Ryzin, Joe; Morgan, Charles; Noland, Gary; Pavlosky, Rick; Thomas, Michael

2012-06-30T23:59:59.000Z

96

Performance analysis of an absorption power cycle for ocean thermal energy conversion  

Science Journals Connector (OSTI)

Abstract An absorption power cycle with two ejectors is proposed for ocean thermal energy conversion. The ammonia–water is used as the working fluid. The ejectors are driven by vapor and solution from the sub-generator. Based on the first and second law, the mathematical model for this cycle is developed and theoretical analysis is conducted to evaluate the effects of thermodynamic parameters on the performance of this cycle. Results show that the absorption temperature is increased by 2.0–6.5 °C by employing the two-stage ejector sub-cycle, which indicates that this proposed cycle can be driven with a lower temperature difference. Further, the thermal efficiency, net thermal efficiency and exergy efficiency of this cycle can reach to 4.17%, 3.10% and 39.92% respectively. Besides, the generation pressure, the heating source temperature, the solution concentration, and the expansion ratio, as well as the entrainment ratio of the first stage ejector have significant effects on the absorption temperature, the thermal efficiency, the exergy efficiency and the exergy loss of this cycle. In addition, 49.80% of exergy loss in this proposed cycle occurs in the generators and reheater, followed by the ejectors of 36.12%.

Han Yuan; Ning Mei; Peilin Zhou

2014-01-01T23:59:59.000Z

97

Ocean Thermal Extractable Energy Visualization- Final Technical Report on Award DE-EE0002664. October 28, 2012  

SciTech Connect (OSTI)

The Ocean Thermal Extractable Energy Visualization (OTEEV) project focuses on assessing the Maximum Practicably Extractable Energy (MPEE) from the world's ocean thermal resources. MPEE is defined as being sustainable and technically feasible, given today's state-of-the-art ocean energy technology. Under this project the OTEEV team developed a comprehensive Geospatial Information System (GIS) dataset and software tool, and used the tool to provide a meaningful assessment of MPEE from the global and domestic U.S. ocean thermal resources. The OTEEV project leverages existing NREL renewable energy GIS technologies and integrates extractable energy estimated from quality-controlled data and projected optimal achievable energy conversion rates. Input data are synthesized from a broad range of existing in-situ measurements and ground-truthed numerical models with temporal and spatial resolutions sufficient to reflect the local resource. Energy production rates are calculated for regions based on conversion rates estimated for current technology, local energy density of the resource, and sustainable resource extraction. Plant spacing and maximum production rates are then estimated based on a default plant size and transmission mechanisms. The resulting data are organized, displayed, and accessed using a multi-layered GIS mapping tool, http://maps.nrel.gov/mhk_atlas with a user-friendly graphical user interface.

Ascari, Matthew B.; Hanson, Howard P.; Rauchenstein, Lynn; Van Zwieten, James; Bharathan, Desikan; Heimiller, Donna; Langle, Nicholas; Scott, George N.; Potemra, James; Nagurny, N. John; Jansen, Eugene

2012-10-28T23:59:59.000Z

98

Ocean | Open Energy Information  

Open Energy Info (EERE)

Related Links List of Ocean Thermal Incentives Retrieved from "http:en.openei.orgwindex.php?titleOcean&oldid273467" Categories: Articles with outstanding TODO tasks Sectors...

99

Ocean Energy Resource Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Hydrogen & Fuel Cells Hydropower Ocean Ocean Thermal Energy Conversion Tidal Energy Wave Energy Ocean Resources Solar Wind Homes & Buildings Industry Vehicles & Fuels...

100

Off-design performance analysis of a closed-cycle ocean thermal energy conversion system with solar thermal preheating and superheating  

Science Journals Connector (OSTI)

Abstract This article reports the off-design performance analysis of a closed-cycle ocean thermal energy conversion (OTEC) system when a solar thermal collector is integrated as an add-on preheater or superheater. Design-point analysis of a simple OTEC system was numerically conducted to generate a gross power of 100 kW, representing a base OTEC system. In order to improve the power output of the OTEC system, two ways of utilizing solar energy are considered in this study: (1) preheating of surface seawater to increase its input temperature to the cycle and (2) direct superheating of the working fluid before it enters a turbine. Obtained results reveal that both preheating and superheating cases increase the net power generation by 20–25% from the design-point. However, the preheating case demands immense heat load on the solar collector due to the huge thermal mass of the seawater, being less efficient thermodynamically. The superheating case increases the thermal efficiency of the system from 1.9% to around 3%, about a 60% improvement, suggesting that this should be a better approach in improving the OTEC system. This research provides thermodynamic insight on the potential advantages and challenges of adding a solar thermal collection component to OTEC power plants.

Hakan Aydin; Ho-Saeng Lee; Hyeon-Ju Kim; Seung Kyoon Shin; Keunhan Park

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Challenges in Ocean Energy Utilization  

Science Journals Connector (OSTI)

Ocean is a reservoir of energy. It is ... . Development of suitable cost effective technologies for power generation from different forms of ocean energy (like wave energy, tidal energy, Ocean Thermal Energy Conv...

S. Neelamani

2013-01-01T23:59:59.000Z

102

An economic and environmental assessment of transporting bulk energy from a grazing ocean thermal energy conversion facility  

Science Journals Connector (OSTI)

Abstract An ocean thermal energy conversion (OTEC) facility produces electrical power without generating carbon dioxide (CO2) by using the temperature differential between the reservoir of cold water at greater depths and the shallow mixed layer on the ocean surface. As some of the best sites are located far from shore, one option is to ship a high-energy carrier by tanker from these open-ocean or “grazing” OTEC platforms. We evaluate the economics and environmental attributes of producing and transporting energy using ammonia (NH3), liquid hydrogen (LH2) and methanol (CH3OH). For each carrier, we develop transportation pathways that include onboard production, transport via tanker, onshore conversion and delivery to market. We then calculate the difference between the market price and the variable cost for generating the product using the OTEC platform without and with a price on CO2 emissions. Finally, we compare the difference in prices to the capital cost of the OTEC platform and onboard synthesis equipment. For all pathways, the variable cost is lower than the market price, although this difference is insufficient to recover the entire capital costs for a first of a kind OTEC platform. With an onboard synthesis efficiency of 75%, we recover 5%, 25% and 45% of the capital and fixed costs for LH2, CH3OH and NH3, respectively. Improving the capital costs of the OTEC platform by up to 25% and adding present estimates for the damages from CO2 do not alter these conclusions. The near-term potential for the grazing OTEC platform is limited in existing markets. In the longer term, lower capital costs combined with improvements in onboard synthesis costs and efficiency as well as increases in CO2 damages may allow the products from OTEC platforms to enter into markets.

Elisabeth A. Gilmore; Andrew Blohm; Steven Sinsabaugh

2014-01-01T23:59:59.000Z

103

Energy from the Ocean [and Discussion  

Science Journals Connector (OSTI)

...development among the ocean energy options, and other relatively...paper focuses on ocean thermal energy conversion (OTEC). However, much of the paper's content has relevance to the use of the other ocean energy sources. Techniques of ocean...

1982-01-01T23:59:59.000Z

104

Ocean thermal energy conversion power system development. Final design report: PSD-I, Phase II  

SciTech Connect (OSTI)

The PSD-I program provides a heat exchanger sytem consisting of an evaporator, condenser and various ancillaries with ammonia used as a working fluid in a closed simulated Rankine cycle. It is to be installed on the Chepachet Research Vessel for test and evaluation of a number of OTEC concepts in a true ocean environment. It is one of several test articles to be tested. Primary design concerns include control of biofouling, corrosion and erosion of aluminum tubes, selection of materials, and the development of a basis for scale-up to large heat exchangers so as to ultimately demonstrate economic feasibility on a commercial scale. The PSD-I test article is devised to verify thermodynamic, environmental, and mechanical performance of basic design concepts. The detailed design, development, fabrication, checklist, delivery, installation support, and operation support for the Test Article Heat Exchangers are described. (WHK)

None

1980-06-30T23:59:59.000Z

105

Pacific Ocean Contribution to the Asymmetry in Eastern Indian Ocean Variability  

Science Journals Connector (OSTI)

Variations in eastern Indian Ocean upper-ocean thermal properties are assessed for the period 1970–2004, with a particular focus on asymmetric features related to opposite phases of Indian Ocean dipole events, using high-resolution ocean model ...

Caroline C. Ummenhofer; Franziska U. Schwarzkopf; Gary Meyers; Erik Behrens; Arne Biastoch; Claus W. Böning

2013-02-01T23:59:59.000Z

106

Hydropower and Ocean Energy Resources and Technologies | Department...  

Energy Savers [EERE]

Several people are photographed standing on the barge. The Ocean Thermal Energy Conversion project at Hawaii's Natural Energy Lab was one of the first successful thermal ocean...

107

Energy and exergy analyses of hydrogen production via solar-boosted ocean thermal energy conversion and PEM electrolysis  

Science Journals Connector (OSTI)

Energy and exergy analyses are reported of hydrogen production via an ocean thermal energy conversion (OTEC) system coupled with a solar-enhanced proton exchange membrane (PEM) electrolyzer. This system is composed of a turbine, an evaporator, a condenser, a pump, a solar collector and a PEM electrolyzer. Electricity is generated in the turbine, which is used by the PEM electrolyzer to produce hydrogen. A simulation program using Matlab software is developed to model the PEM electrolyzer and OTEC system. The simulation model for the PEM electrolyzer used in this study is validated with experimental data from the literature. The amount of hydrogen produced, the exergy destruction of each component and the overall system, and the exergy efficiency of the system are calculated. To better understand the effect of various parameters on system performance, a parametric analysis is carried out. The energy and exergy efficiencies of the integrated OTEC system are 3.6% and 22.7% respectively, and the exergy efficiency of the PEM electrolyzer is about 56.5% while the amount of hydrogen produced by it is 1.2 kg/h.

Pouria Ahmadi; Ibrahim Dincer; Marc A. Rosen

2013-01-01T23:59:59.000Z

108

Creation of nonlinear density gradients for use in internal wave research  

E-Print Network [OSTI]

A method was developed to create a nonlinear density gradient in a tank of water. Such gradients are useful for studying internal waves, an ocean phenomenon that plays an important role in climate and ocean circulation. ...

Harris, Victoria Siân

2007-01-01T23:59:59.000Z

109

Internal Waves in the Ocean  

Science Journals Connector (OSTI)

Salinity temperature and pressure gradients all cause the density of sea water to vary with depth in the ocean and the density gradient affects the motion of the waters. A quantity N having the units radians per second can be defined using the density gradient the velocity of sound and the acceleration of gravity.

Carl Eckart

1961-01-01T23:59:59.000Z

110

Effects of thermal pollution on the soft-bottoms surrounding a power station in the Canary Islands (NE Atlantic ocean)  

Science Journals Connector (OSTI)

The spatial and temporal effects of hot seawater (60–70°C) from a power station on nearby soft-bottom communities were ... coast of Tenerife, Canary Islands, NE Atlantic Ocean). The samples were taken during summ...

Rodrigo Riera; Jorge Núñez; Daniel Martín

2011-12-01T23:59:59.000Z

111

Effects of horizontal mixing on the upper ocean temperature in the equatorial Pacific Ocean  

Science Journals Connector (OSTI)

The influence of horizontal mixing on the thermal structure of the equatorial Pacific Ocean is examined based on a sigma coordinate ... on the upper thermal structure in the equatorial Pacific Ocean, while their ...

Chuanjiang Huang; Fangli Qiao

2012-01-01T23:59:59.000Z

112

Chapter 16 - Ocean Engines  

Science Journals Connector (OSTI)

Publisher Summary Ocean thermal energy converters (OTECs) took advantage of the ocean acting as an immense collector and storer of solar radiation, thus delivering a steady flow of low-grade thermal energy. The ocean plays a similar role in relation to the wind energy, which is transformed into waves far steadier than the air currents that created them. Nevertheless, waves are neither steady nor concentrated enough to constitute a highly attractive energy source notwithstanding their large total power. There is little net horizontal motion of water in a surface ocean wave. A floating object drifts in the direction of the wave with about 1% of the wave velocity. A given elementary cell of water will move in a vertical circle, surging forward near the crest of the wave but receding by an almost equal amount at the trough. Any system in which the wave velocity depends on wavelength is called dispersive; hence the deep ocean is dispersive.

Aldo Vieira da Rosa

2009-01-01T23:59:59.000Z

113

8.01 - Generating Electrical Power from Ocean Resources  

Science Journals Connector (OSTI)

Abstract Ocean energy resources derived from wind, waves, tidal or marine currents can be utilized and converted to large scale sustainable electrical power. Conversion technologies are easily adaptable and can be integrated within the current utility infrastructure. However, ocean energy has many forms - tides, surface waves, ocean circulation, salinity, and thermal gradients. The focus of this chapter is dedicated to two of these, namely waves and tidal energy. The first are the result of wind-driven waves derived ultimately from solar energy and the latter represents those found in tidal or marine currents, driven by gravitational effects. This chapter also gives an analysis of the current state of art of generating electricity from wave and tidal currents (termed ocean energy). Section 8.01.1 provides an overview of ocean wave and marine current energy conversion with more emphasis on the latter; Sections 8.01.2, 8.01.3, 8.01.4, and 8.01.5 address respectively the history of wave energy, wave resource assessment, wave device development, and air turbines; and Section 8.01.6 gives a review of the economics of ocean energy as applied to wave and tidal energy conversion technologies.

A.S. Bahaj

2012-01-01T23:59:59.000Z

114

Effects of thermocline on performance of underwater glider’s power system propelled by ocean thermal energy  

Science Journals Connector (OSTI)

The thermal glider’s changeable volume produces propelling force to power the glider’s descending and ascending through ... affect the working processes of the glider’s power system. Based on the enthalpy method,...

Hai Yang; Jie Ma

2009-12-01T23:59:59.000Z

115

Ocean Energy Technology Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Ocean Energy Technology Basics Ocean Energy Technology Basics Ocean Energy Technology Basics August 16, 2013 - 4:18pm Addthis Text Version Photo of low waves in the ocean. A dock is visible in the background. Oceans cover more than 70% of the Earth's surface. As the world's largest solar collectors, oceans contain thermal energy from the sun and produce mechanical energy from tides and waves. Even though the sun affects all ocean activity, the gravitational pull of the moon primarily drives tides, and wind powers ocean waves. Learn more about: Ocean Thermal Energy Conversion Tidal Energy Wave Energy Ocean Resources Addthis Related Articles Energy Department Releases New Energy 101 Video on Ocean Power A map generated by Georgia Tech's tidal energy resource database shows mean current speed of tidal streams. The East Coast, as shown above, has strong tides that could be tapped to produce energy. | Photo courtesy of Georgia Institute of Technology

116

Upper ocean processes observed by underwater gliders in the California Current System  

E-Print Network [OSTI]

temperature and salinity gradients in the ocean mixed layer,across the background salinity gradient (e.g. , Figure 3.8)with largest mean salinity gradients below the thermocline.

Todd, Robert E.

2011-01-01T23:59:59.000Z

117

Ocean energy conversion systems annual research report  

SciTech Connect (OSTI)

Alternative power cycle concepts to the closed-cycle Rankine are evaluated and those that show potential for delivering power in a cost-effective and environmentally acceptable fashion are explored. Concepts are classified according to the ocean energy resource: thermal, waves, currents, and salinity gradient. Research projects have been funded and reported in each of these areas. The lift of seawater entrained in a vertical steam flow can provide potential energy for a conventional hydraulic turbine conversion system. Quantification of the process and assessment of potential costs must be completed to support concept evaluation. Exploratory development is being completed in thermoelectricity and 2-phase nozzles for other thermal concepts. Wave energy concepts are being evaluated by analysis and model testing with present emphasis on pneumatic turbines and wave focussing. Likewise, several conversion approaches to ocean current energy are being evaluated. The use of salinity resources requires further research in membranes or the development of membraneless processes. Using the thermal resource in a Claude cycle process as a power converter is promising, and a program of R and D and subsystem development has been initiated to provide confirmation of the preliminary conclusion.

Not Available

1981-03-01T23:59:59.000Z

118

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

power plants, solar thermal energy, geothermal energy, oceanpower plants, distributed solar thermal energy, geo/ocean-power plants [59]. Other LGH sources include solar thermal energy, geo-thermal energy, ocean

Lim, Hyuck

2011-01-01T23:59:59.000Z

119

Generating electricity from the oceans  

Science Journals Connector (OSTI)

Ocean energy has many forms, encompassing tides, surface waves, ocean circulation, salinity and thermal gradients. This paper will considers two of these, namely those found in the kinetic energy resource in tidal streams or marine currents, driven by gravitational effects, and the resources in wind-driven waves, derived ultimately from solar energy. There is growing interest around the world in the utilisation of wave energy and marine currents (tidal stream) for the generation of electrical power. Marine currents are predictable and could be utilised without the need for barrages and the impounding of water, whilst wave energy is inherently less predictable, being a consequence of wind energy. The conversion of these resources into sustainable electrical power offers immense opportunities to nations endowed with such resources and this work is partially aimed at addressing such prospects. The research presented conveys the current status of wave and marine current energy conversion technologies addressing issues related to their infancy (only a handful being at the commercial prototype stage) as compared to others such offshore wind. The work establishes a step-by-step approach that could be used in technology and project development, depicting results based on experimental and field observations on device fundamentals, modelling approaches, project development issues. It includes analysis of the various pathways and approaches needed for technology and device or converter deployment issues. As most technology developments are currently UK based, the paper also discusses the UK's financial mechanisms available to support this area of renewable energy, highlighting the needed economic approaches in technology development phases. Examination of future prospects for wave and marine current ocean energy technologies are also discussed.

AbuBakr S. Bahaj

2011-01-01T23:59:59.000Z

120

Nekton community change along estuarine salinity gradients: Can salinity zones be defined?  

Science Journals Connector (OSTI)

Organisms tend to inhabit predictable portions of estuaries along salinity gradients between the ocean inlets (salinity > 35 psu) and the freshwater tributaries (salinity = 0). Previous studies have suggested ......

Marin F. D. Greenwood

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Quantitative analysis of damage in an octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazonic-based composite explosive subjected to a linear thermal gradient  

Science Journals Connector (OSTI)

The microstructure within a slowly heated consolidated explosive will be influenced by both physical changes and chemical reactions prior to thermal ignition. Thermal expansion exothermic decomposition endothermic phase change and increased binder viscosity play significant roles in the cook-off to detonation. To further explore the details of this intricate cook-off process we have conducted a series of experiments in which a carefully controlled temperature gradient has been applied along a cylinder of PBX 9501 [94.9/2.5/2.5/0.1-wt % octahydro-1 3 5 7-tetranitro-1 3 5 7-tetrazocine (HMX)/Estane 5703/a eutectic mixture of bis(2 2 dinitropropyl) acetal and bis(2 2-dinitropropyl) formal [abbreviated BDNPA-F]/Irganox] and maintained for a specified amount of time. After heating and subsequent cooling of the PBX 9501 the sample morphology has been probed with polarized light microscopy and small-angle x-ray scattering. Using these techniques we have quantitatively characterized the particle morphology porosity and chemical state of the explosive as a function of position and therefore thermal treatment. Results of the analyses clearly show that thermal damage in PBX 9501 can be classified into two separate temperature regimes—an initial low-temperature regime ( 155 – 174 ° C ) dominated by the endothermic ? - ? crystalline phase change thermal expansion and Ostwald ripening and a high-temperature regime ( 175 – 210 ° C ) dominated by exothermic chemical decomposition. The results further show the complex interplay between the evolving sample morphology and the chemical reactions leading to a potential thermal self-ignition in the explosive.

Paul D. Peterson; Joseph T. Mang; Blaine W. Asay

2005-01-01T23:59:59.000Z

122

Quantitative analysis of damage in an octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazonic-based composite explosive subjected to a linear thermal gradient  

SciTech Connect (OSTI)

The microstructure within a slowly heated, consolidated explosive will be influenced by both physical changes and chemical reactions prior to thermal ignition. Thermal expansion, exothermic decomposition, endothermic phase change, and increased binder viscosity play significant roles in the cook-off to detonation. To further explore the details of this intricate cook-off process, we have conducted a series of experiments in which a carefully controlled temperature gradient has been applied along a cylinder of PBX 9501 [94.9/2.5/2.5/0.1-wt % octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX)/Estane 5703/a eutectic mixture of bis(2,2 dinitropropyl) acetal and bis(2,2-dinitropropyl) formal [abbreviated BDNPA-F]/Irganox] and maintained for a specified amount of time. After heating and subsequent cooling of the PBX 9501, the sample morphology has been probed with polarized light microscopy and small-angle x-ray scattering. Using these techniques we have quantitatively characterized the particle morphology, porosity, and chemical state of the explosive as a function of position, and therefore thermal treatment. Results of the analyses clearly show that thermal damage in PBX 9501 can be classified into two separate temperature regimes--an initial low-temperature regime (155-174 deg. C) dominated by the endothermic {beta}-{delta} crystalline phase change, thermal expansion, and Ostwald ripening, and a high-temperature regime (175-210 deg. C) dominated by exothermic chemical decomposition. The results further show the complex interplay between the evolving sample morphology and the chemical reactions leading to a potential thermal self-ignition in the explosive.

Peterson, Paul D.; Mang, Joseph T.; Asay, Blaine W. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2005-05-01T23:59:59.000Z

123

Warm Bias and Parameterization of Boundary Upwelling in Ocean Models  

SciTech Connect (OSTI)

It has been demonstrated that Eastern Boundary Currents (EBC) are a baroclinic intensification of the interior circulation of the ocean due to the emergence of mesoscale eddies in response to the sharp buoyancy gradients driven by the wind-stress and the thermal surface forcing. The eddies accomplish the heat and salt transport necessary to insure that the subsurface flow is adiabatic, compensating for the heat and salt transport effected by the mean currents. The EBC thus generated occurs on a cross-shore scale of order 20-100 km, and thus this scale needs to be resolved in climate models in order to capture the meridional transport by the EBC. Our result indicate that changes in the near shore currents on the oceanic eastern boundaries are linked not just to local forcing, such as coastal changes in the winds, but depend on the basin-wide circulation as well.

Cessi, Paola; Wolfe, Christopher

2012-11-06T23:59:59.000Z

124

Heat-Flow Below the Oceans  

Science Journals Connector (OSTI)

... oceans. His two values of 22 and 26 metres per degree Centigrade give an average geothermal gradient of about 42 C./km., which he says is unexpectedly high1.

A. E. BENFIELD

1950-03-18T23:59:59.000Z

125

Thermal springs list for the United States; National Oceanic and Atmospheric Administration Key to Geophysical Records Documentation No. 12  

SciTech Connect (OSTI)

The compilation has 1702 thermal spring locations in 23 of the 50 States, arranged alphabetically by State (Postal Service abbreviation) and degrees of latitude and longitude within the State. It shows spring name, surface temperature in degrees Fahrenheit and degrees Celsius; USGS Professional Paper 492 number, USGS Circular 790 number, NOAA number, north to south on each degree of latitude and longitude of the listed. USGS 1:250,000-scale (AMS) map; and the USGS topographic map coverage, 1:63360- or 1:62500-scale (15-minute) or 1:24000-scale (7.5-minute) quadrangle also included is an alphabetized list showing only the spring name and the State in which it is located. Unnamed springs are omitted. The list includes natural surface hydrothermal features: springs, pools, mud pots, mud volcanoes, geysers, fumaroles, and steam vents at temperature of 20{sup 0}C (68[sup 0}F) or greater. It does not include wells or mines, except at sites where they supplement or replace natural vents presently or recently active, or, in some places, where orifices are not distinguishable as natural or artificial. The listed springs are located on the USGS 1:250,000 (AMS) topographic maps. (MHR)

Berry, G.W.; Grim, P.J.; Ikelman, J.A. (comps.)

1980-06-01T23:59:59.000Z

126

OceanEnergyMMS.p65  

Broader source: Energy.gov (indexed) [DOE]

Minerals Management Service, U.S. Department of the Interior Ocean Energy PAGE 1 Minerals Management Service, U.S. Department of the Interior Ocean Energy PAGE 1 Teacher Guide .......................................................... 2 Related National Science Standards .......................... 3 Introduction to Ocean Energy .................................. 4 Petroleum & Natural Gas ......................................... 5 Natural Oil and Gas Seeps ........................................ 7 Methane Hydrates .................................................... 8 Solar Energy .............................................................. 9 Wind Energy ........................................................... 10 Wave Energy ........................................................... 11 OTEC: Ocean Thermal Energy Conversion .............

127

Ocean Wave Converters: State of the Art and Current Status  

E-Print Network [OSTI]

Ocean Wave Converters: State of the Art and Current Status M.S. Lagoun1,2 , A. Benalia2 and M in one of the following categories: wave energy, marine and tidal current energy, ocean thermal energy of energy exists in oceans. Ocean energy exists in many forms. Among these forms, significant opportunities

Paris-Sud XI, Université de

128

Simplified modeling of liquid sodium medium with temperature and velocity gradient using real thermal-hydraulic data. Application to ultrasonic thermometry in sodium fast reactor  

SciTech Connect (OSTI)

In the framework of the French R and D program for the Generation IV reactors and specifically for the sodium cooled fast reactors (SFR), studies are carried out on innovative instrumentation methods in order to improve safety and to simplify the monitoring of fundamental physical parameters during reactor operation. The aim of the present work is to develop an acoustic thermometry method to follow up the sodium temperature at the outlet of subassemblies. The medium is a turbulent flow of liquid sodium at 550 Degree-Sign C with temperature inhomogeneities. To understand the effect of disturbance created by this medium, numerical simulations are proposed. A ray tracing code has been developed with Matlab Copyright-Sign in order to predict acoustic paths in this medium. This complex medium is accurately described by thermal-hydraulic data which are issued from a simulation of a real experiment in Japan. The analysis of these results allows understanding the effects of medium inhomogeneities on the further thermometric acoustic measurement.

Massacret, N.; Jeannot, J. P. [DEN/DTN/STPA/LIET, CEA Cadarache, Saint Paul Lez Durance (France); Moysan, J.; Ploix, M. A.; Corneloup, G. [Aix-Marseille Univ, LMA UPR 7051 CNRS, site LCND, 13625 Aix-en-Provence (France)

2013-01-25T23:59:59.000Z

129

Flexible ocean upwelling pipe  

DOE Patents [OSTI]

In an ocean thermal energy conversion facility, a cold water riser pipe is releasably supported at its upper end by the hull of the floating facility. The pipe is substantially vertical and has its lower end far below the hull above the ocean floor. The pipe is defined essentially entirely of a material which has a modulus of elasticity substantially less than that of steel, e.g., high density polyethylene, so that the pipe is flexible and compliant to rather than resistant to applied bending moments. The position of the lower end of the pipe relative to the hull is stabilized by a weight suspended below the lower end of the pipe on a flexible line. The pipe, apart from the weight, is positively buoyant. If support of the upper end of the pipe is released, the pipe sinks to the ocean floor, but is not damaged as the length of the line between the pipe and the weight is sufficient to allow the buoyant pipe to come to a stop within the line length after the weight contacts the ocean floor, and thereafter to float submerged above the ocean floor while moored to the ocean floor by the weight. The upper end of the pipe, while supported by the hull, communicates to a sump in the hull in which the water level is maintained below the ambient water level. The sump volume is sufficient to keep the pipe full during heaving of the hull, thereby preventing collapse of the pipe.

Person, Abraham (Los Alamitos, CA)

1980-01-01T23:59:59.000Z

130

Predictability of the Barents Sea ice in early winter: Remote effects of oceanic and atmospheric thermal conditions from the North Atlantic  

Science Journals Connector (OSTI)

Predictability of sea ice concentrations (SICs) in the Barents Sea in early winter (November–December) is studied using canonical correlation analysis with atmospheric and ocean anomalies from the NCEP Climate Forecast System Reanalysis (NCEP-CFSR)...

Takuya Nakanowatari; Kazutoshi Sato; Jun Inoue

131

Ocean Science, 1, 145157, 2005 www.ocean-science.net/os/1/145/  

E-Print Network [OSTI]

. On the other hand, the thermal forcing has a neg- ligible effect on the ocean currents. For sea ice, both of heat by the ocean current and advect also warmer air in the Weddell Sea and colder air in the Ross SeaOcean Science, 1, 145­157, 2005 www.ocean-science.net/os/1/145/ SRef-ID: 1812-0792/os/2005

Paris-Sud XI, Université de

132

Microconvection effects at double?diffusive gradient zone boundaries  

Science Journals Connector (OSTI)

Microconvection in double?diffusive gradient zones is predicted to occur near the zone boundaries because of effects of boundary undulation and temperature modulation caused by impinging thermals in adjacent convecting zones. The equations that govern convective motion in a double?diffusive horizontal slab are solved for boundary conditions that incorporate these effects. Solution of these equations predicts a weakened salinity gradient near the gradient zone boundary between the rising thermals. When the salinity gradient is too weak instability occurs taking the form of descending plumes which are seen in experiments.

John R. Hull; Yojana Katti

1988-01-01T23:59:59.000Z

133

Ocean Acidification  

Science Journals Connector (OSTI)

Ocean Acidification ... The first assignment I give my students in Environmental Modeling class is to calculate the mass of the oceans versus the mass of the atmosphere and the “living” soil. ... As a young chemical engineer in the early 1970s, I remember discussing the horrors of sulfur and particulate pollution from steel mills, smelters, and power plants. ...

Jerald L. Schnoor

2013-11-05T23:59:59.000Z

134

On the use of drogues for measuring subsurface ocean currents  

Science Journals Connector (OSTI)

Drogues are frequently used to measure ocean currents. Wind drag and subsurface drag on the ... , as well as non-linear effects of current velocity gradients, can cause slippage past the ... must be considered wh...

Dr. David A. Booth

1981-01-01T23:59:59.000Z

135

2, 299329, 2005 SAM: Role of thermal  

E-Print Network [OSTI]

. On the other hand, the thermal forcing has a negligible effect on the ocean currents. For sea ice, both Version Interactive Discussion EGU Ocean Science Discussions, 2, 299­329, 2005 www.ocean-science.net/osd/2/299/ SRef-ID: 1812-0822/osd/2005-2-299 European Geosciences Union Ocean Science Discussions Papers published

Paris-Sud XI, Université de

136

Ocean Energy  

Science Journals Connector (OSTI)

Some of these technologies are taking off from very low power capacities, although with an intense activity....4, 5] including La Rance tidal power station calculate a capacity of ocean energy facilities worldwid...

Ricardo Guerrero-Lemus; José Manuel Martínez-Duart

2013-01-01T23:59:59.000Z

137

Ocean Climate Change: Comparison of Acoustic  

E-Print Network [OSTI]

Ocean Climate Change: Comparison of Acoustic Tomography, Satellite Altimetry, and Modeling The ATOC to thermal expansion. Interpreting climate change signals from fluctuations in sea level is therefore in the advective heat flux. Changes in oceanic heat storage are a major expected element of future climate shifts

Frandsen, Jannette B.

138

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

solar radiation, and the geothermal energy. [16] Fig. 1.1.thermal energy, geothermal energy, wasted heat from athermal energy, geothermal energy, ocean thermal energy,

Lim, Hyuck

2011-01-01T23:59:59.000Z

139

Estimates of Cabbeling in the Global Ocean  

E-Print Network [OSTI]

Owing to the larger thermal expansion coefficient at higher temperatures, more buoyancy is put into the ocean by heating than is removed by cooling at low temperatures. The authors show that, even with globally balanced ...

Schmitt, Raymond W.

140

Why does the Atlantic Ocean form the northern hemisphere deep Johan Nilsson, Department of Meteorology, Stockholm University, Sweden.  

E-Print Network [OSTI]

is the fact that the meridional gradients due to temperature and salinity have opposite effect on the density gradient: the temperature gradient acts to drive the surface water polewards, whereas the salinity gradient of Meteorology, Stockholm University, Sweden. Background The Atlantic Ocean stands out as the most saline

Nilsson, Johan

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Joining of Tungsten Armor Using Functional Gradients  

SciTech Connect (OSTI)

The joining of low thermal expansion armor materials such as tungsten to high thermal expansion heat sink materials has been a major problem in plasma facing component (PFC) development. Conventional planar bonding techniques have been unable to withstand the high thermal induced stresses resulting from fabrication and high heat flux testing. During this investigation, innovative functional gradient joints produced using vacuum plasma spray forming techniques have been developed for joining tungsten armor to copper alloy heat sinks. A model was developed to select the optimum gradient architecture. Based on the modeling effort, a 2mm copper rich gradient was selected. Vacuum plasma pray parameters and procedures were then developed to produce the functional gradient joint. Using these techniques, dual cooling channel, medium scale mockups (32mm wide x 400mm length) were produced with vacuum plasma spray formed tungsten armor. The thickness of the tungsten armor was up to 5mm thick. No evidence of debonding at the interface between the heat sink and the vacuum plasma sprayed material was observed.

John Scott O'Dell

2006-12-31T23:59:59.000Z

142

Turning Ocean Water Into Rain  

Science Journals Connector (OSTI)

...an alternative method of desalination for mainland communities...Although thermally driven desalination may be a good option for...a good attempt, but the economics will have to be proved.” Kathiroli...are just starting out.” Desalination. Turning ocean water into...

Yudhijit Bhattacharjee

2007-06-29T23:59:59.000Z

143

Fast Self-Healing Gradients  

E-Print Network [OSTI]

We present CRF-Gradient, a self-healing gradient algorithm that provably reconfigures in O(diameter) time. Self-healing gradients are a frequently used building block for distributed self-healing systems, but previous ...

Beal, Jacob

144

Steep Gradient Flume | Open Energy Information  

Open Energy Info (EERE)

Steep Gradient Flume Steep Gradient Flume Jump to: navigation, search Basic Specifications Facility Name Steep Gradient Flume Overseeing Organization University of Iowa Hydrodynamic Testing Facility Type Flume Length(m) 20.1 Beam(m) 0.9 Depth(m) 0.5 Cost(per day) Contact POC Special Physical Features Tilting flume from -1.5 to +16% slope; <3mm sedimentation recirculation capabilities; instrumentation rails Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Recirculating Yes Wind Capabilities Wind Capabilities None Control and Data Acquisition Cameras Yes Number of Color Cameras 1 Available Sensors Acoustics, Flow, Thermal, Turbulence, Velocity Data Generation Capability Real-Time Yes

145

Oceans '88  

SciTech Connect (OSTI)

These proceedings discuss the following papers: Solid waste disposal crisis; Plastics in Ocean; Continental shelf environmental research; Seafood technology advancements; Gulf of Mexico chemosynthetic petroleum seep communities; Water reuse on onshore mariculture and processing facilities; Oil and gas industry conflicts on the outer continental shelf; Cumulative environmental effects of the oil and gas leasing program; Oil and gas exploration; and Oil and gas resource management; Aids to navigation systems and equipment; and Surveillance experiments.

Not Available

1988-01-01T23:59:59.000Z

146

Hot Pot Contoured Temperature Gradient Map  

SciTech Connect (OSTI)

Temperature gradient contours derived from Oski temperature gradient hole program and from earlier published information.

Lane, Michael

2013-06-28T23:59:59.000Z

147

Hot Pot Contoured Temperature Gradient Map  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Temperature gradient contours derived from Oski temperature gradient hole program and from earlier published information.

Lane, Michael

148

Recurrent policy gradients  

Science Journals Connector (OSTI)

......for recurrent neural networks Recurrent policy gradients Daan Wierstra Alexander Forster...POMDPs) is a challenge as it requires policies with an internal state. Traditional approaches...offer a natural framework for dealing with policy learning using hidden state and require......

Daan Wierstra; Alexander Förster; Jan Peters; Jürgen Schmidhuber

2010-10-01T23:59:59.000Z

149

Ocean Temperature Gradients: Solar Power from the Sea  

Science Journals Connector (OSTI)

...col-lection of sunlight and storage of en-ergy. Undoubtedly...condenser cooled by cold seawater. A very important and...probably because it used seawater, which has a very low...submerged system, the seawater's hydrostatic pressure...shellfish with water pumped up from a depth of 870...

William D. Metz

1973-06-22T23:59:59.000Z

150

Ocean Observing Ocean Observing Systems (OOS)  

E-Print Network [OSTI]

, national, and global scales. · Ocean Observing Systems serve: Fishing industry National security Coastal properties, such as salinity, temperature, and waves Satellite maps of sea surface temperature NATIONAL Integrated Ocean Observing System (IOOS) 11 REGIONAL Systems, including: MANY LOCAL Systems

Schladow, S. Geoffrey

151

On the Calculation of Acoustic Intensity Fluctuations Caused by Ocean Currents  

Science Journals Connector (OSTI)

Ocean currents can cause significant and interesting effects on ... of which is valid for different magnitudes of current speed, current gradient, and sound-speed variation. Numerical results indicate that some current

J. S. Robertson; M. J. Jacobson; W. L. Siegmann

1987-01-01T23:59:59.000Z

152

Reconstructing Past Ocean Salinity ((delta)18Owater)  

SciTech Connect (OSTI)

Temperature and salinity are two of the key properties of ocean water masses. The distribution of these two independent but related characteristics reflects the interplay of incoming solar radiation (insolation) and the uneven distribution of heat loss and gain by the ocean, with that of precipitation, evaporation, and the freezing and melting of ice. Temperature and salinity to a large extent, determine the density of a parcel of water. Small differences in temperature and salinity can increase or decrease the density of a water parcel, which can lead to convection. Once removed from the surface of the ocean where 'local' changes in temperature and salinity can occur, the water parcel retains its distinct relationship between (potential) temperature and salinity. We can take advantage of this 'conservative' behavior where changes only occur as a result of mixing processes, to track the movement of water in the deep ocean (Figure 1). The distribution of density in the ocean is directly related to horizontal pressure gradients and thus (geostrophic) ocean currents. During the Quaternary when we have had systematic growth and decay of large land based ice sheets, salinity has had to change. A quick scaling argument following that of Broecker and Peng [1982] is: the modern ocean has a mean salinity of 34.7 psu and is on average 3500m deep. During glacial maxima sea level was on the order of {approx}120m lower than present. Simply scaling the loss of freshwater (3-4%) requires an average increase in salinity a similar percentage or to {approx}35.9psu. Because much of the deep ocean is of similar temperature, small changes in salinity have a large impact on density, yielding a potentially different distribution of water masses and control of the density driven (thermohaline) ocean circulation. It is partly for this reason that reconstructions of past salinity are of interest to paleoceanographers.

Guilderson, T P; Pak, D K

2005-11-23T23:59:59.000Z

153

The Pacific Ocean’s Acidification Laboratory  

Science Journals Connector (OSTI)

The Pacific Ocean’s Acidification Laboratory ... Five years ago, at the quadrennial International Coral Reef Symposium in Okinawa, Japan, a poll of the scientists and resource managers present ranked ocean acidification 38th out of a list of 39 possible threats facing reefs, recalls Rusty Brainard, head of the National Oceanic and Atmospheric Administration’s (NOAA’s) Coral Reef Ecosystem Division. ... As the oceans absorb CO2 from the atmosphere at the rate of one million tons per hour, the pH of the water is changing. ...

Christopher Pala

2009-08-05T23:59:59.000Z

154

GEOPHYSICAL RESEARCH LETTERS, VOL. 0, NO. 0, PAGES 0-0, M 0, 2001 On the Pacific Ocean regime shift  

E-Print Network [OSTI]

GEOPHYSICAL RESEARCH LETTERS, VOL. 0, NO. 0, PAGES 0-0, M 0, 2001 On the Pacific Ocean regime shift variability of Pacific Ocean upper ocean heat content is examined for the 1948-1998 period using gridded-wide phenomenon affecting the thermal structure from 60 S to 70 N. EOF analysis of the Pacific Ocean heat content

155

Deep-Sea Research II 53 (2006) 3141 Decadal variability of wind-energy input to the world ocean  

E-Print Network [OSTI]

- tion is emerging. Although the ocean receives a huge amount of thermal energy, it cannot convert such thermal energy into mechanical energy very effi- ciently because the ocean is heated and cooled fromDeep-Sea Research II 53 (2006) 31­41 Decadal variability of wind-energy input to the world ocean

Huang, Rui Xin

156

Energy in density gradient  

E-Print Network [OSTI]

Inhomogeneous plasmas and fluids contain energy stored in inhomogeneity and they naturally tend to relax into lower energy states by developing instabilities or by diffusion. But the actual amount of energy in such inhomogeneities has remained unknown. In the present work the amount of energy stored in a density gradient is calculated for several specific density profiles in a cylindric configuration. This is of practical importance for drift wave instability in various plasmas, and in particular in its application in models dealing with the heating of solar corona because the instability is accompanied with stochastic heating, so the energy contained in inhomogeneity is effectively transformed into heat. It is shown that even for a rather moderate increase of the density at the axis in magnetic structures in the corona by a factor 1.5 or 3, the amount of excess energy per unit volume stored in such a density gradient becomes several orders of magnitude greater than the amount of total energy losses per unit ...

Vranjes, J

2015-01-01T23:59:59.000Z

157

ocean | OpenEI  

Open Energy Info (EERE)

ocean ocean Dataset Summary Description This shapefile represents the seasonal winter depth profile to reach water at a temperature of 20ºC. Source NREL Date Released October 28th, 2012 (2 years ago) Date Updated Unknown Keywords depth profile hydrokinetic ocean ocean energy ocean thermal energy conversion OTEC seawater cooling thermal Data application/zip icon OTEC Seawater Cooling 20ºC Depth Profile - Winter Average (zip, 1.1 MiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period March 2009 - February 2011 License License Other or unspecified, see optional comment below Comment This GIS data was developed by the National Renewable Energy Laboratory ("NREL"), which is operated by the Alliance for Sustainable Energy, LLC for the U.S. Department of Energy ("DOE"). The user is granted the right, without any fee or cost, to use, copy, modify, alter, enhance and distribute this data for any purpose whatsoever, provided that this entire notice appears in all copies of the data. Further, the user of this data agrees to credit NREL in any publications or software that incorporate or use the data. Access to and use of the GIS data shall further impose the following obligations on the User. The names DOE/NREL may not be used in any advertising or publicity to endorse or promote any product or commercial entity using or incorporating the GIS data unless specific written authorization is obtained from DOE/NREL. The User also understands that DOE/NREL shall not be obligated to provide updates, support, consulting, training or assistance of any kind whatsoever with regard to the use of the GIS data. THE GIS DATA IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DOE/NREL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO CLAIMS ASSOCIATED WITH THE LOSS OF DATA OR PROFITS, WHICH MAY RESULT FROM AN ACTION IN CONTRACT, NEGLIGENCE OR OTHER TORTIOUS CLAIM THAT ARISES OUT OF OR IN CONNECTION WITH THE ACCESS OR USE OF THE GIS DATA. The User acknowledges that access to the GIS data is subject to U.S. Export laws and regulations and any use or transfer of the GIS data must be authorized under those regulations. The User shall not use, distribute, transfer, or transmit GIS data or any products incorporating the GIS data except in compliance with U.S. export regulations. If requested by DOE/NREL, the User agrees to sign written assurances and other export-related documentation as may be required to comply with U.S. export regulations.

158

Hydropower and Ocean Energy Resources and Technologies | Department of  

Broader source: Energy.gov (indexed) [DOE]

Hydropower and Ocean Energy Resources and Technologies Hydropower and Ocean Energy Resources and Technologies Hydropower and Ocean Energy Resources and Technologies October 7, 2013 - 9:29am Addthis Photo of water flowing from several openings in a hydropower dam. Hydropower produces 10% of the nation's energy, including power from the Ice Harbor Dam in Burbank, Washington. This page provides a brief overview of hydropower and ocean energy resources and technologies supplemented by specific information to apply these technologies within the Federal sector. Overview Hydropower has been used for centuries to power machinery, but the application most commonly associated with hydropower is electricity production through dams. Ocean energy refers to various forms of renewable energy harnessed from the ocean. There are two primary types of ocean energy: mechanical and thermal.

159

The effects of an ambient salinity gradient on the dilution of dense brine jets  

E-Print Network [OSTI]

THE EFFECTS OF AN AMBIENT SALINITY GRADIENT ON THE DILUTION OF DENSE BRINE JETS A Thesis by GARY WAYNE MCCULLOUGH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 1986 Major Subject: Ocean Engineering THE EFFECTS OF AN AMBIENT SALINITY GRADIENT ON THE DILUTION OF DENSE BRINE JETS A Thesis by GARY NAYNE MCCULLOUGH Approved as to style and content by: Robert E. Randall (Chair of Committee...

McCullough, Gary Wayne

2012-06-07T23:59:59.000Z

160

Gradient Resources | Open Energy Information  

Open Energy Info (EERE)

Resources Resources Jump to: navigation, search Logo: Gradient Resources Name Gradient Resources Address 9670 Gateway Drive, Suite 200 Place Reno, Nevada Zip 89521 Sector Geothermal energy Year founded 1991 Company Type For Profit Phone number (775) 284-8842 Website http://www.gradient.com/ Region Rockies Area References Gradient Resources Website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! Gradient Resources is a company based in Reno, Nevada. Gradient Resources is engaged in the exploration and development of geothermal resources as well as the construction, ownership and operation of geothermal power plants. The Company is headquartered in Reno, Nevada with a regional office, drilling operations center, and well-cementing

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Hierarchically deflated conjugate gradient  

E-Print Network [OSTI]

We present a multi-level algorithm for the solution of five dimensional chiral fermion formulations, including domain wall and Mobius Fermions. The algorithm operates on the red-black preconditioned Hermitian operator, and directly accelerates conjugate gradients on the normal equations. The coarse grid representation of this matrix is next-to-next-to-next-to-nearest neighbour and multiple algorithmic advances are introduced, which help minimise the overhead of the coarse grid. The treatment of the coarse grids is purely four dimensional, and the bulk of the coarse grid operations are nearest neighbour. The intrinsic cost of most of the coarse grid operations is therefore comparable to those for the Wilson case. We also document the implementation of this algorithm in the BAGEL/Bfm software package and report on the measured performance gains the algorithm brings to simulations at the physical point on IBM BlueGene/Q hardware.

P A Boyle

2014-02-11T23:59:59.000Z

162

Cold Water Flow and Upper-Ocean Currents in the Bismarck Sea from December 2001 to January 2002  

Science Journals Connector (OSTI)

The authors investigated the upper-ocean currents in the Bismarck Sea and related oceanic thermal changes in the western equatorial South Pacific for December 2001–January 2002; during this period, coastal upwelling occurred along the Papua New ...

Takuya Hasegawa; Kentaro Ando; Hideharu Sasaki

2011-04-01T23:59:59.000Z

163

Gradient Sliding for Composite Optimization  

E-Print Network [OSTI]

Noname manuscript No. (will be inserted by the editor). Gradient Sliding for Composite Optimization. Guanghui Lan the date of receipt and acceptance should ...

2014-06-11T23:59:59.000Z

164

Makai Ocean Engineering Inc | Open Energy Information  

Open Energy Info (EERE)

Makai Ocean Engineering Inc Makai Ocean Engineering Inc Jump to: navigation, search Name Makai Ocean Engineering Inc Address PO Box 1206 Place Kailua Zip 96734-1206 Sector Marine and Hydrokinetic Year founded 1973 Number of employees 28 Phone number 808.259.8871 Website http://www.makai.com Region United States LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters This company is involved in the following MHK Technologies: Deep Water Pipelines This article is a stub. You can help OpenEI by expanding it.

165

Gravitational Potential Energy Sinks in the Oceans R. X. Huang* and W. Wang+  

E-Print Network [OSTI]

Gravitational Potential Energy Sinks in the Oceans R. X. Huang* and W. Wang+ *Woods Hole conversion rate from internal energy to GPE through molecular diffusion. More relevant to the ocean in the ocean interior, only if the heating source is located below the cooling source. For Case 3, thermal

Huang, Rui Xin

166

Solar energy storage by salinity gradient solar pond: Pilot plant construction and gradient control  

Science Journals Connector (OSTI)

An experimental solar pond pilot plant was constructed in Solvay-Martorell, facilities, Catalonia (NE part of the Iberian Peninsula) to capture and store solar energy. The body of the pond is a cylindrical reinforced concrete tank, 3 m height, 8 m diameter and total area of 50 m2. Salinity and thermal gradient were properly established by using the salinity distribution methodology. The gradient in the pond was maintained by feeding salt (NaCl) through a cylindrical salt charger to the bottom at a height of 80 cm from the pond floor. Continuous surface washing using tap water supply maintained the salinity of the top convective layer at a low level and compensate loses by evaporation. An acidification method by addition of \\{HCl\\} at different heights was used to control the clarity of the pond. The salinity gradient was fully established on 30 September 2009 and has been maintained until the date. After winter time (February 2010), the pond warms up and the temperature increased continuously until it reached its maximum (55 °C) in August 2010. The salinity gradient observed great stability after one year of continuous control and maintenance and under different weather conditions.

César Valderrama; Oriol Gibert; Jordina Arcal; Pau Solano; Aliakbar Akbarzadeh; Enric Larrotcha; José Luis Cortina

2011-01-01T23:59:59.000Z

167

Covariation of climate and long-term erosion rates across a steep rainfall gradient on the Hawaiian island of Kaua'i  

E-Print Network [OSTI]

Erosion of volcanic ocean islands creates dramatic landscapes, modulates Earth’s carbon cycle, and delivers sediment to coasts and reefs. Because many volcanic islands have large climate gradients and minimal variations ...

Ferrier, Ken L.

168

Salt Gradient Solar Pond for Solar Heat Collection and Lang Term Storage  

Science Journals Connector (OSTI)

Work is described concerning the instrumentation, thermal modelling and laboratory tests on a salt gradient solar pond to be used for heat collection and storage. A densitameter capable of measuring the salinity....

V. Phillips; P. J. Unsworth; N. A. Al-Saleh

1983-01-01T23:59:59.000Z

169

An innovative approach to heat extraction from a salinity gradient solar pond to enhance overall efficiency.  

E-Print Network [OSTI]

??A solar pond is a simple and low-cost solar collector with long-term thermal storage. It utilizes a large body of salinity gradient water to absorb… (more)

Yaakob, Y

2013-01-01T23:59:59.000Z

170

Spatially resolved lasers using a glassy cholesteric liquid crystal film with lateral pitch gradient  

E-Print Network [OSTI]

Spatially resolved lasers using a glassy cholesteric liquid crystal film with lateral pitch crystal CLC lasers, a lateral pitch gradient was introduced by thermally activated diffusion across efficiencies, 0.2%­1.5%, are superior to those reported to date for gradient-pitch CLC lasers. © 2011 American

Chen, Shaw H.

171

Causes of ocean currents  

Science Journals Connector (OSTI)

In the foregoing analysis of the ocean and the atmosphere as two interacting subsystems, we have identified two major energy inputs into the ocean. These are the wind stress over the sea surface and heat fluxe...

David Tolmazin

1985-01-01T23:59:59.000Z

172

Novel green illumination energy for LED with ocean battery materials  

Science Journals Connector (OSTI)

This paper launches novel materials of LED with ocean battery. Ocean battery employs sea water existing by the nature as energy materials to drive LED lamp lighting. The analysing methods are thermal-, electric- and illumination-performance experiments to discuss the novel green illumination techniques. Ocean battery and LED are all DC components, there is no energy loss of current converter between them, and the ocean battery has more electricity in LED illumination. Vapour chamber (VC) and aluminium (AL) materials are assigned to be the LED PCBs. Results show that the effective thermal conductivity of the VCPCB is many times higher than that of the ALPCB, proving that it can effectively reduce the temperature of the LED and obtain more uniform luminance. And the output voltage and LED lighting start unstable resulting from the air bubble of ocean battery slight vibration.

Jung-Chang Wang

2012-01-01T23:59:59.000Z

173

Influence of the Iceland mantle plume on oceanic crust generation in the North Atlantic  

Science Journals Connector (OSTI)

......analogue-digital converter with a dynamic range...reverberation of seismic energy in the water column...the North Atlantic ocean. The change in morphology...support from the thermal anomaly in the mantle...margin and mantle thermal anomalies beneath...generation beneath mid-ocean ridges, Earth planet......

C. J. Parkin; R. S. White

2008-04-01T23:59:59.000Z

174

High field gradient particle accelerator  

DOE Patents [OSTI]

A high electric field gradient electron accelerator utilizing short duration, microwave radiation, and capable of operating at high field gradients for high energy physics applications or at reduced electric field gradients for high average current intermediate energy accelerator applications is disclosed. Particles are accelerated in a smooth bore, periodic undulating waveguide, wherein the period is so selected that the particles slip an integral number of cycles of the r.f. wave every period of the structure. This phase step of the particles produces substantially continuous acceleration in a traveling wave without transverse magnetic or other guide means for the particle. 10 figs.

Nation, J.A.; Greenwald, S.

1989-05-30T23:59:59.000Z

175

High field gradient particle accelerator  

DOE Patents [OSTI]

A high electric field gradient electron accelerator utilizing short duration, microwave radiation, and capable of operating at high field gradients for high energy physics applications or at reduced electric field gradients for high average current intermediate energy accelerator applications. Particles are accelerated in a smooth bore, periodic undulating waveguide, wherein the period is so selected that the particles slip an integral number of cycles of the r.f. wave every period of the structure. This phase step of the particles produces substantially continuous acceleration in a traveling wave without transverse magnetic or other guide means for the particle.

Nation, John A. (Ithaca, NY); Greenwald, Shlomo (Haifa, IL)

1989-01-01T23:59:59.000Z

176

Ocean | Data.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ocean Ocean Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean Welcome to our COMMUNITY This is the National Ocean Council's portal for data, information, and decision tools to support people engaged in regional marine planning for the future use of the ocean, our coasts, and the Great Lakes. Our goal is to enhance discovery of and access to data and information for planners, stakeholders, and the public. Please visit our Feedback page to tell us what would make the site most useful to you as we expand our content. Start Here! Previous Pause Next PacIOOS - Pacific Islands Voyager PacIOOS - Pacific Islands Voyager View More West Coast Governors Alliance - Regional Data Framework West Coast Governors Alliance - Regional Data Framework View More Mid-Atlantic Ocean Data Portal

177

Salinity gradient energy potential in Colombia considering site specific constraints  

Science Journals Connector (OSTI)

Abstract The theoretical potential of salinity gradient energy in river mouth systems is the maximum amount of energy that can be extracted from the controlled mixing of river water and seawater. It is calculated using the Gibbs free energy of mixing equations considering as inputs the mean rivers' discharge and the long term salinity of the ocean basin. However, this theoretical amount of energy can be far from the reality because both, the river discharge and the salinity of the ocean, have natural variations in different time scales. In this paper we expose the site constraints related with the variability of the salinity gradients that must be considered in order to make a more accurate estimation of the available resources and calculate the so-called site specific potential for the most important and feasible river mouths of Colombia. The results show that in Colombia a mean site specific potential of 15.6 GW can be achieved, mainly in the Magdalena River mouth (97% of total). But more important, the results show that the salinity structure of the studied systems have different responses to variations of the environmental forcing, despite being located in the same ocean basin, and therefore, the energy potential for each river mouth has different variability patterns at different time scales. Decreases of the estimated energy potential up to 69% were found when the site specific potential is calculated instead of the theoretical potential. This prove that more detailed input data than long term discharges and salinities are necessary in order to make accurate estimations of local and regional salinity gradient energy potentials.

Oscar Alvarez-Silva; Andrés F. Osorio

2015-01-01T23:59:59.000Z

178

Determination of thermal conductivity and formation temperature from cooling history of friction-heated probes  

Science Journals Connector (OSTI)

......of geothermal gradient and thermal conductivity of rocks or sediments...the formation temperature and thermal conductivity. Ideally, to...measurements require extra battery power supply and an additional...cooling curve for deducing the thermal properties has been contemplated......

Tien-Chang Lee; A. D. Duchkov; S. G. Morozov

2003-02-01T23:59:59.000Z

179

Correlated Knowledge Gradients: Example alternatives  

E-Print Network [OSTI]

Correlated Knowledge Gradients: Example -4 -2 0 2 4 alternatives value 0 10 20 30 -10 -8 -6 -4 -2 0;Correlated Knowledge Gradients: Example -4 -2 0 2 4 alternatives value 0 10 20 30 -10 -8 -6 -4 -2 0 num measurements log(KGfactor) 0 10 20 30 0 0.5 1 1.5 2 num measurements opportunitycost #12;Correlated Knowledge

Keinan, Alon

180

ARM - Lesson Plans: Thermal Expansion of Water  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of sea water expands. It is this thermal expansion of the ocean water which makes the sea level rise. Recently, it was asked why a bunsen burner was heating the Erlenmeyer flask in...

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

The impact of oceanic heat transport on the atmospheric circulation  

E-Print Network [OSTI]

A general circulation model of intermediate complexity with an idealized earthlike aquaplanet setup is used to study the impact of changes in the oceanic heat transport on the global atmospheric circulation. Focus is put on the Lorenz energy cycle and the atmospheric mean meridional circulation. The latter is analysed by means of the Kuo-Eliassen equation. The atmospheric heat transport compensates the imposed oceanic heat transport changes to a large extent in conjunction with significant modification of the general circulation. Up to a maximum about 3PW, an increase of the oceanic heat transport leads to an increase of the global mean near surface temperature and a decrease of its equator-to-pole gradient. For larger transports, the gradient is reduced further but the global mean remains approximately constant. This is linked to a cooling and a reversal of the temperature gradient in the tropics. A larger oceanic heat transport leads to a reduction of all reservoirs and conversions of the Lorenz energy cycl...

Knietzsch, Marc-Andre; Lunkeit, Frank

2014-01-01T23:59:59.000Z

182

The Mechanical Energy Input to the Ocean Induced by Tropical Cyclones LING LING LIU AND WEI WANG  

E-Print Network [OSTI]

, and environments. 1. Introduction Although oceans receive a huge amount of thermal energy, such energy cannot be efficiently converted into mechanical energy because the ocean is heated and cooled from the same geopotentialThe Mechanical Energy Input to the Ocean Induced by Tropical Cyclones LING LING LIU AND WEI WANG

Huang, Rui Xin

183

How ocean currents are studied  

Science Journals Connector (OSTI)

How infinite and boundless the ocean must have seemed to the first man to set foot upon its shore. Kind or stern, shallow or steep, the ocean’s shores have always held a peculiar fascination for man. The moist...

David Tolmazin

1985-01-01T23:59:59.000Z

184

Ocean General Circulation Models  

SciTech Connect (OSTI)

1. Definition of Subject The purpose of this text is to provide an introduction to aspects of oceanic general circulation models (OGCMs), an important component of Climate System or Earth System Model (ESM). The role of the ocean in ESMs is described in Chapter XX (EDITOR: PLEASE FIND THE COUPLED CLIMATE or EARTH SYSTEM MODELING CHAPTERS). The emerging need for understanding the Earth’s climate system and especially projecting its future evolution has encouraged scientists to explore the dynamical, physical, and biogeochemical processes in the ocean. Understanding the role of these processes in the climate system is an interesting and challenging scientific subject. For example, a research question how much extra heat or CO2 generated by anthropogenic activities can be stored in the deep ocean is not only scientifically interesting but also important in projecting future climate of the earth. Thus, OGCMs have been developed and applied to investigate the various oceanic processes and their role in the climate system.

Yoon, Jin-Ho; Ma, Po-Lun

2012-09-30T23:59:59.000Z

185

Gas Exchange, Partial Pressure Gradients,  

E-Print Network [OSTI]

Gas Exchange, Partial Pressure Gradients, and the Oxygen Window Johnny E. Brian, Jr., M of circulatory and gas transport physiology, and the best place to start is with normobaric physiology. LIFE affect the precise gas exchange occurring in individual areas of the lungs and body tissues. To make

Riba Sagarra, Jaume

186

The Extended Finite Element Method for High Gradient Solutions  

E-Print Network [OSTI]

Outline Enrichment functions for high gradient solutions Motivation High gradient inside the domain (Shocks) High gradient at the boundary (boundary layers) Optimal set of enrichment functions Numerical for high gradient solutions Outline Enrichment functions for high gradient solutions Motivation High

187

Design, prototyping, and testing of an apparatus for establishing a linear temperature gradient in experimental fish tanks  

E-Print Network [OSTI]

Immunology researchers require a new type of fish tank that provides a linear thermal gradient for experimental zebrafish in order to improve the accuracy and validity of their research. Zebrafish require the ability to ...

Kadri, Romi Sinclair

2014-01-01T23:59:59.000Z

188

Thermal Gradient Holes At Fenton Hill HDR Geothermal Area (Purtymun...  

Open Energy Info (EERE)

Valles caldera in order to locate an of high heat flow that would serve as a favorable test site for the HDR concept. Notes Data from these wells are report in Reiter et al....

189

Thermal Gradient Holes At Roosevelt Hot Springs Geothermal Area...  

Open Energy Info (EERE)

References S. H. Ward, W. T. Parry, W. P. Nash, W. R. Sill, K. L. Cook, R. B. Smith, D. S. Chapman, F. H. Brown, J. A. Whelan, J. R. Bowman (1978) A Summary of the...

190

Thermal Gradient Holes At Long Valley Caldera Geothermal Area...  

Open Energy Info (EERE)

Regime of Long Valley Caldera. Journal of Geophysical Research. 81(5):763-768. J.L. Smith,R.W. Rex. 1977. Drilling results from eastern Long Valley Caldera. () : American...

191

Thermal Gradient Holes At Long Valley Caldera Geothermal Area...  

Open Energy Info (EERE)

studies, and seem to prove useful in most cases (Flexser, 1991; Goff et al., 1991; Smith and Suemnicht, 1991). Results from these studies are also summarized in Sorey et al....

192

Constraining oceanic dust deposition using surface ocean dissolved Al  

E-Print Network [OSTI]

Constraining oceanic dust deposition using surface ocean dissolved Al Qin Han,1 J. Keith Moore,1; accepted 7 December 2007; published 12 April 2008. [1] We use measurements of ocean surface dissolved Al (DEAD) model to constrain dust deposition to the oceans. Our Al database contains all available

Zender, Charles

193

Effective Thermal Conductivity of Graded Nanocomposites with Interfacial Thermal  

E-Print Network [OSTI]

.M. Yin", G. H. Paulino", W.G. Buttlar", and L.Z. Sun'' '^Department of Civil and Environmental the effective thermal conductivity distribution in functionally graded materials (FGMs) considering the Kapitza is developed to derive the averaged heat flux field of the particle phase. Then the temperature gradient can

Paulino, Glaucio H.

194

Simple ocean carbon cycle models  

SciTech Connect (OSTI)

Simple ocean carbon cycle models can be used to calculate the rate at which the oceans are likely to absorb CO{sub 2} from the atmosphere. For problems involving steady-state ocean circulation, well calibrated ocean models produce results that are very similar to results obtained using general circulation models. Hence, simple ocean carbon cycle models may be appropriate for use in studies in which the time or expense of running large scale general circulation models would be prohibitive. Simple ocean models have the advantage of being based on a small number of explicit assumptions. The simplicity of these ocean models facilitates the understanding of model results.

Caldeira, K. [Lawrence Livermore National Lab., CA (United States); Hoffert, M.I. [New York Univ., NY (United States). Dept. of Earth System Sciences; Siegenthaler, U. [Bern Univ. (Switzerland). Inst. fuer Physik

1994-02-01T23:59:59.000Z

195

Thermal Stress Analysis of LCA-based Solid Oxide Fuel Cells.  

E-Print Network [OSTI]

??This research characterizes the thermal stress resulting from temperature gradients in hybrid solid oxide fuel cells that are processed using a novel oxide powder slurry… (more)

LeMasters, Jason Augustine

2004-01-01T23:59:59.000Z

196

Use of Ocean Energies  

Science Journals Connector (OSTI)

For converting the current of water for the production of electricity, there is a wide range of technological approaches. The Italian ocean current power plant named Kobold (Fig. 6.2) was the first commercial o...

Prof. Dr.-Ing Hermann-Josef Wagner…

2011-01-01T23:59:59.000Z

197

ocean energy | OpenEI  

Open Energy Info (EERE)

ocean energy ocean energy Dataset Summary Description This shapefile represents the seasonal winter depth profile to reach water at a temperature of 20ºC. Source NREL Date Released October 28th, 2012 (2 years ago) Date Updated Unknown Keywords depth profile hydrokinetic ocean ocean energy ocean thermal energy conversion OTEC seawater cooling thermal Data application/zip icon OTEC Seawater Cooling 20ºC Depth Profile - Winter Average (zip, 1.1 MiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period March 2009 - February 2011 License License Other or unspecified, see optional comment below Comment This GIS data was developed by the National Renewable Energy Laboratory ("NREL"), which is operated by the Alliance for Sustainable Energy, LLC for the U.S. Department of Energy ("DOE"). The user is granted the right, without any fee or cost, to use, copy, modify, alter, enhance and distribute this data for any purpose whatsoever, provided that this entire notice appears in all copies of the data. Further, the user of this data agrees to credit NREL in any publications or software that incorporate or use the data. Access to and use of the GIS data shall further impose the following obligations on the User. The names DOE/NREL may not be used in any advertising or publicity to endorse or promote any product or commercial entity using or incorporating the GIS data unless specific written authorization is obtained from DOE/NREL. The User also understands that DOE/NREL shall not be obligated to provide updates, support, consulting, training or assistance of any kind whatsoever with regard to the use of the GIS data. THE GIS DATA IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DOE/NREL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO CLAIMS ASSOCIATED WITH THE LOSS OF DATA OR PROFITS, WHICH MAY RESULT FROM AN ACTION IN CONTRACT, NEGLIGENCE OR OTHER TORTIOUS CLAIM THAT ARISES OUT OF OR IN CONNECTION WITH THE ACCESS OR USE OF THE GIS DATA. The User acknowledges that access to the GIS data is subject to U.S. Export laws and regulations and any use or transfer of the GIS data must be authorized under those regulations. The User shall not use, distribute, transfer, or transmit GIS data or any products incorporating the GIS data except in compliance with U.S. export regulations. If requested by DOE/NREL, the User agrees to sign written assurances and other export-related documentation as may be required to comply with U.S. export regulations.

198

Salinity Gradient Energy at River Mouths  

Science Journals Connector (OSTI)

Salinity Gradient Energy at River Mouths ... River mouths are potentially abundant locations for the exploitation of the clean and renewable salinity gradient energy (SGE) as here perpetually fresh water mixes with saline seawater. ...

Oscar Alvarez-Silva; Christian Winter; Andres F. Osorio

2014-09-03T23:59:59.000Z

199

Revisiting an Old Concept: The Gradient Wind  

Science Journals Connector (OSTI)

The gradient wind is defined as a horizontal wind having the same direction as the geostrophic wind but with a magnitude consistent with a balance of three forces: the pressure gradient force, the Coriolis force, and the centrifugal force arising ...

Keith F. Brill

2014-04-01T23:59:59.000Z

200

Eects of convection instability due to incompatibility between ocean dynamics and surface forcings  

E-Print Network [OSTI]

- bility between a surface temperature climatology and a given ocean model, into which the climatology by thermal and wind forcing only. Initially, the temperature climatology is forcefully assimilated climatology. In areas characterized by sharp oceanic fronts and high convective activity, the OGCM, due

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Makai Ocean Engineering, Inc.'s Recent OTEC Activities at NELHA  

E-Print Network [OSTI]

Makai Ocean Engineering, Inc.'s Recent OTEC Activities at NELHA Duke Hartman Vice President of the company and provide some details about one current project: Makai's OTEC demonstration plant, and operator of an Ocean Thermal Energy Conversion (OTEC) power plant and heat exchanger test facility at NELHA

Frandsen, Jannette B.

202

Improved irradiances for use in ocean heating, primary production, and photo-oxidation calculations  

E-Print Network [OSTI]

computed by a radiative transfer code that can be used to convert above-surface values in either energy- plankton affect upper-ocean thermal structure via absorption of solar irradiance at visible wavelengthsImproved irradiances for use in ocean heating, primary production, and photo-oxidation calculations

Boss, Emmanuel S.

203

The Effects Of High Pressure-High Temperature On Some Physical Properties Of Ocean Sediments  

E-Print Network [OSTI]

A series of laboratory experiments was conducted with four ocean sediments, two biogenic oozes and two clays. Permeability and thermal conductivity were directly measured as a function of porosity and the testing program ...

Morin, Roger

1983-01-01T23:59:59.000Z

204

Zonal displacement of western Pacific warm pool and zonal wind anomaly over the Pacific Ocean  

Science Journals Connector (OSTI)

The thermal condition anomaly of the western Pacific warm pool and its zonal displacement have ... impact of the zonal wind anomaly over the Pacific Ocean on zonal displacement of the warm pool ... to the zonal w...

Qilong Zhang ???; Qinghua Zhang ???…

2007-07-01T23:59:59.000Z

205

Solar thermal power generation: a bibliography with abstracts. Quarterly update, October-December 1979  

SciTech Connect (OSTI)

This annotated bibliography contains the following subjects: energy overviews, solar overviews, energy conservation, economics and law, solar thermal power, thermionic and thermoelectric, ocean thermal energy conversion, biomass and photochemical energy, and large-scale photovoltaics. (MHR)

Not Available

1980-04-01T23:59:59.000Z

206

Bayesian Policy Gradient and Actor-Critic Algorithms Bayesian Policy Gradient and Actor-Critic Algorithms  

E-Print Network [OSTI]

Bayesian Policy Gradient and Actor-Critic Algorithms Bayesian Policy Gradient and Actor Yaakov Engel yakiengel@gmail.com Editor: Abstract Policy gradient methods are reinforcement learning algorithms that adapt a param- eterized policy by following a performance gradient estimate. Many

Paris-Sud XI, Université de

207

Determination of thermal conductivity and formation temperature from cooling history of friction-heated probes  

Science Journals Connector (OSTI)

......dissipation at the rising cost of ship operational time...penetrations for measurements of geothermal gradients at closely...paves the way at no extra cost for the determination...imposing heat flow as an energy constraint in transient...typical measurement of geothermal gradient in the ocean......

Tien-Chang Lee; A. D. Duchkov; S. G. Morozov

2003-02-01T23:59:59.000Z

208

Infrasonic ambient ocean noise: Northeast Pacific Ocean  

Science Journals Connector (OSTI)

Measurements of ocean ambient noise were made at three widely separated deep?water bottom locations in the N. E. Pacific at eight frequencies in the range from 2.5–20.0 Hz for 40 consecutive days. Concurrent data on wind speed and wave height were collected. Analysis indicates that the spectrum level of infrasonicnoise is linearly related to the log of the wind speed above a threshold level. There is evidence that the noise can be directly associated with the wind rather than through the surface waves it produces. [Work supported by ONR.

Rudolph H. Nichols

1985-01-01T23:59:59.000Z

209

Incursion of the Pacific Ocean Water into the Indian Ocean  

Science Journals Connector (OSTI)

Using the data collected during the International Indian Ocean Expedition, maps showing the distribution of depth ... became clear that low-salinity water from the Pacific intrudes into the western Indian Ocean t...

G S Sharma; A D Gouveia…

1978-03-01T23:59:59.000Z

210

Ocean Circulation Lynne D Talley  

E-Print Network [OSTI]

to the topography, with low pressure in the center. Ocean currents transport heat from the tropics to the poles have gone to sea. As knowledge about ocean currents and capabilities to observe it below the surfaceOcean Circulation Lynne D Talley Volume 1, The Earth system: physical and chemical dimensions

Talley, Lynne D.

211

Water transport inside a single-walled carbon nanotube driven by temperature gradient  

E-Print Network [OSTI]

Water transport inside a single-walled carbon nanotube driven by temperature gradient J. Shiomi mass transport of a water cluster inside a single-walled carbon nanotube (SWNT) with the diameter of about 1.4 nm. The influence of the non-equilibrium thermal environment on the confined water cluster has

Maruyama, Shigeo

212

Optimization of synchronization in gradient clustered networks  

E-Print Network [OSTI]

We consider complex clustered networks with a gradient structure, where sizes of the clusters are distributed unevenly. Such networks describe more closely actual networks in biophysical systems and in technological applications than previous models. Theoretical analysis predicts that the network synchronizability can be optimized by the strength of the gradient field but only when the gradient field points from large to small clusters. A remarkable finding is that, if the gradient field is sufficiently strong, synchronizability of the network is mainly determined by the properties of the subnetworks in the two largest clusters. These results are verified by numerical eigenvalue analysis and by direct simulation of synchronization dynamics on coupled-oscillator networks.

Xingang Wang; Liang Huang; Ying-Cheng Lai; Choy Heng Lai

2007-11-23T23:59:59.000Z

213

Optimization Online - An Accelerated Proximal Coordinate Gradient ...  

E-Print Network [OSTI]

Jul 7, 2014 ... An Accelerated Proximal Coordinate Gradient Method and its Application to Regularized Empirical Risk Minimization. Qihang Lin(qihang-lin ...

Qihang Lin

2014-07-07T23:59:59.000Z

214

Why Sequence Subarctic Pacific Ocean?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sequence Subarctic Pacific Ocean? Sequence Subarctic Pacific Ocean? The subarctic Pacific Ocean is one of the areas considered particularly vulnerable to acidification, which could affect the ocean's ability to act as a carbon sink. Global warming affects the food webs and biodiversity in marine ecosystems, especially in regions known as oxygen minimum zones where key components of the global carbon cycle take place. Oxygen minimum zones are found between 200 and 1,000 meters below sea level in the subarctic Pacific, the eastern South Pacific Ocean, the northern parts of the Indian Ocean and Arabian Sea, and off southwestern Africa. As global warming continues, researchers believe the oxygen levels in the oceans will decrease, a change that will extend the boundaries of the oxygen minimum

215

PCBs and OCPs on a East-to-West Transect: The Importance of Major Currents and Net Volatilization for PCBs in the Atlantic Ocean  

Science Journals Connector (OSTI)

PCBs and OCPs on a East-to-West Transect: The Importance of Major Currents and Net Volatilization for PCBs in the Atlantic Ocean ... In summary, we collected and analyzed samples collected across the tropical Atlantic to deduce whether (i) there were significant east–west and north–south gradients of selected PCB congeners and OCPs; (ii) the Atlantic Ocean was a net sink or secondary source of PCBs and OCPs; (iii) ocean current and river plumes would affect the presence and air–water gradients of selected POPs; and (iv) to compare active and passive sampling approaches for POPs. ... Iwata, H.; Tanabe, S.; Sakai, N.; Tatsukawa, R.Distribution of Persistent Organochlorines in the Oceanic Air and Surface Seawater and the Role of Oceans on Their Global Transport and Fate Environ. ...

Rainer Lohmann; Jana Klanova; Petr Kukucka; Shifra Yonis; Kevyn Bollinger

2012-02-02T23:59:59.000Z

216

Microinstabilities in weak density gradient tokamak systems  

SciTech Connect (OSTI)

A prominent characteristic of auxiliary-heated tokamak discharges which exhibit improved (''H-mode type'') confinement properties is that their density profiles tend to be much flatter over most of the plasma radius. Depsite this favorable trend, it is emphasized here that, even in the limit of zero density gradient, low-frequency microinstabilities can persist due to the nonzero temperature gradient.

Tang, W.M.; Rewoldt, G.; Chen, L.

1986-04-01T23:59:59.000Z

217

Chapter 5 Salinity Gradient Energy  

Science Journals Connector (OSTI)

There exists a huge potential for the generation of energy from the mixing of saltwater and freshwater. The potential is 2.6 TW, which is more than the global electricity consumption (2.0 TW). Two membrane-based technologies exist to convert this potentially available energy into useful power: pressure-retarded osmosis (PRO) and reverse electrodialysis (RED). In PRO, water is transported through a semipermeable membrane from the less concentrated solution toward the concentrated salt solution to generate power. In RED, salt ions are transported from the concentrated salt solution through ion exchange membranes toward the less concentrated solution to extract the energy. Both technologies were developed in the 1970s and 1980s and both regained interest lately due to recent developments in membrane technology and the need for sustainable energy processes. This chapter describes the potential of salinity gradient energy of both processes in detail, and an overview of the relevant literature on both technologies is presented. Furthermore, it summarizes the recent developments, pilot testing, scale-up, and future expectations of both technologies.

Kitty Nijmeijer; Sybrand Metz

2010-01-01T23:59:59.000Z

218

Satellite-based assessment of cloud-free net radiative effect of dust aerosols over the Atlantic Ocean  

E-Print Network [OSTI]

and the Earth's Radiant Energy System (CERES) data from the Terra satellite over the Atlantic Ocean [10W­60W, 0 Ocean Sundar A. Christopher1 and Thomas Jones1 Received 7 August 2006; revised 8 November 2006; accepted effect (+1.44 ± 0.57 Wm�2 ) indicating the importance of the dust aerosols in the thermal portion

Christopher, Sundar A.

219

Ocean dynamics and thermodynamics in the tropical Indo- Pacific region  

E-Print Network [OSTI]

Pacific Oceans . . . . . . . . . . . . . . . . . . . . . . . . . . . . .currents in the tropical Pacific Ocean. J. Phys. Oceanogr. ,in the eastern tropical Pacific Ocean associated with the

Drushka, Kyla

2011-01-01T23:59:59.000Z

220

Were Archaean continental geothermal gradients much steeper than today? (reply)  

Science Journals Connector (OSTI)

... -We did not intend to suggest that our gradients bore any relationship to near-surface geothermal gradients. It may have been clearer to have termed them average ... gradients. It may have been clearer to have termed them average geothermal gradients. Our purpose in quoting these gradients was simply to emphasise that the temperature ...

KEVIN BURKE; W. S. F. KIDD

1978-08-17T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Applications of salinity gradient solar technologies in the Southwest -- An overview  

SciTech Connect (OSTI)

This paper is an overview of recent applications of salinity gradient solar technologies (SGST) in the Southwest and especially in the State of Texas. SGST is a generic title for using a salinity gradient in a body of water to suppress convection and collect solar energy for a desired application, for example, salinity gradient solar ponds. Following initial work in the early 1980s at the El Paso Solar Pond project and funding of the Texas Solar Pond Consortium by the State of Texas and the Bureau of Reclamation, several applications involving the use of salinity gradient solar technologies have emerged. These applications include a biomass waste to energy project using heat from a solar pond at Bruce Foods Corporation; an industrial process heat application for sodium sulfate mining near Seagraves, Texas; overwintering thermal refuges for mariculture in Palacios, Texas; a potential salt management project on the Brazos River near Abilene, Texas; and use of solar ponds for brine disposal at a water desalting project in a small colonia east of El Paso. This paper discusses salinity gradient solar technology requirements and the abundance of resources available in Texas and the Southwest which makes this an attractive location for the commercial development of salinity gradient projects. Barriers to development as well as catalysts are discussed before a brief overview of the projects listed above is provided.

Swift, A.H.P.; Lu, H. [Univ. of Texas, El Paso, TX (United States)

1996-12-31T23:59:59.000Z

222

Measurement of thermodynamics using gradient flow  

E-Print Network [OSTI]

We analyze bulk thermodynamics and correlation functions of the energy-momentum tensor in pure Yang-Mills gauge theory using the energy-momentum tensor defined by the gradient flow and small flow time expansion. Our results on thermodynamic observables are consistent with those obtained by the conventional integral method. The analysis of the correlation function of total energy supports the energy conservation. It is also addressed that these analyses with gradient flow require less statistics compared with the previous methods. All these results suggest that the energy-momentum tensor can be successfully defined and observed on the lattice with moderate numerical costs with the gradient flow.

Masakiyo Kitazawa; Masayuki Asakawa; Tetsuo Hatsuda; Takumi Iritani; Etsuko Itou; Hiroshi Suzuki

2014-12-15T23:59:59.000Z

223

ARM - Lesson Plans: Ocean Currents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ocean Currents Outreach Home Room News Publications Traditional Knowledge Kiosks Barrow, Alaska Tropical Western Pacific Site Tours Contacts Students Study Hall About ARM Global...

224

Ballistic dispersion in temperature gradient focusing  

E-Print Network [OSTI]

regime is the most familiar regime in microfluidic systems, an oft-overlooked regime is that of purely kinematic (or ballistic) dispersion. In most microfluidic systems, this dispersion regime is transient systems. Keywords: microfluidics; temperature gradient focusing; kinematic dispersion; Taylor

Santiago, Juan G.

225

Separation of carbon nanotubes in density gradients  

DOE Patents [OSTI]

The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media.

Hersam, Mark C. (Evanston, IL); Stupp, Samuel I. (Chicago, IL); Arnold, Michael S. (Northbrook, IL)

2012-02-07T23:59:59.000Z

226

Separation of carbon nanotubes in density gradients  

DOE Patents [OSTI]

The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media.

Hersam, Mark C. (Evanston, IL); Stupp, Samuel I. (Chicago, IL); Arnold, Michael S. (Northbrook, IL)

2010-02-16T23:59:59.000Z

227

The proximal-proximal gradient algorithm  

E-Print Network [OSTI]

Aug 23, 2013 ... to consider a proximal gradient algorithm [11] for solving (1), where one ...... Hence, in the case when ? = 1 and M is surjective so that T = MR for ...

2013-08-24T23:59:59.000Z

228

Program predicts two-phase pressure gradients  

SciTech Connect (OSTI)

The calculator program discussed, ORK, was designed for the HP-41CV hand-held calculator and uses the Orkiszewski correlation for predicting 2-phase pressure gradients in vertical tubulars. Accurate predictions of pressure gradients in flowing and gas lift wells over a wide range of well conditions can be obtained with this method, which was developed based on data from 148 wells. The correlation is one of the best generalized 2-phase pressure gradient prediction methods developed to date for vertical flow. It is unique in that hold-up is derived from observed physical phenomena, and the pressure gradient is related to the geometrical distribution of the liquid and gas phase (flow regime).

Jacks, D.C.; Hill, A.D.

1983-11-18T23:59:59.000Z

229

Geoengineering Downwelling Ocean Currents: A Cost Assessment  

Science Journals Connector (OSTI)

Downwelling ocean currents carry carbon into the deep ocean (the solubility pump), and play a ... weakening of the NADW is modification of downwelling ocean currents, by an increase in carbon concentration or ......

S. Zhou; P. C. Flynn

2005-07-01T23:59:59.000Z

230

Legal Implications of CO2 Ocean Storage  

E-Print Network [OSTI]

, ocean currents may prevent stagnation or accumulatioLegal Implications of CO2 Ocean Storage Jason Heinrich Working Paper Laboratory for Energy #12;Introduction Ocean sequestration of CO2, a potentially significant technique to be used

231

Ocean currents help explain population genetic structure  

Science Journals Connector (OSTI)

...original work is properly cited. Ocean currents help explain population genetic...larval dispersal estimates based on ocean current observations, we demonstrate...Data-assimilated models of ocean currents for the study region were produced...

2010-01-01T23:59:59.000Z

232

Configuration of a Southern Ocean Storm Track  

Science Journals Connector (OSTI)

Diagnostics of ocean variability that reflect and influence local transport properties of heat and chemical species vary by an order of magnitude along the Southern Ocean’s Antarctic Circumpolar Current (ACC). Topographic “hotspots” are important ...

Tobias Bischoff; Andrew F. Thompson

2014-12-01T23:59:59.000Z

233

Pelagic Polychaetes of the Pacific Ocean  

E-Print Network [OSTI]

Polyc'kaetes of the Pacific Ocean CLAPARtDE,E. 1868. LesPolyc'haetes of the Pacific Ocean KINBERG, J. G. H. 1866.Polyc'kaetes of the Pacific Ocean TREADWELL, A. L. 1906.

Dales, K Phillips

1957-01-01T23:59:59.000Z

234

The Plastic Ocean Michael Gonsior  

E-Print Network [OSTI]

The Plastic Ocean Michael Gonsior Bonnie Monteleone, William Cooper, Jennifer O'Keefe, Pamela Seaton, and Maureen Conte #12;#12;#12;Plastic does not biodegrade it photo-degrades breaking down is the plastic cheese wrap? Unfortunately, marine creatures mistake plastics in the ocean for food #12

Boynton, Walter R.

235

GENERATING ELECTRICITY USING OCEAN WAVES  

E-Print Network [OSTI]

GENERATING ELECTRICITY USING OCEAN WAVES A RENEWABLE SOURCE OF ENERGY REPORT FOR THE HONG KONG ELECTRIC COMPANY LIMITED Dr L F Yeung Mr Paul Hodgson Dr Robin Bradbeer July 2007 #12;Ocean Waves and construction of equipment that could measure and log wave conditions and tide levels at Hoi Ha Wan. Prototypes

Bradbeer, Robin Sarah

236

Shallow Drilling In The Salton Sea Region, The Thermal Anomaly  

SciTech Connect (OSTI)

During two shallow thermal drilling programs, thermal measurements were obtained in 56 shallow (76.2 m) and one intermediate (457.3 m) depth holes located both onshore and offshore along the southern margin of the Salton Sea in the Imperial Valley, California. These data complete the surficial coverage of the thermal anomaly, revealing the shape and lateral extent of the hydrothermal system. The thermal data show the region of high thermal gradients to extend only a short distance offshore to the north of the Quaternary volcanic domes which are exposed along the southern shore of the Salton Sea. The thermal anomaly has an arcuate shape, about 4 km wide and 12 km long. Across the center of the anomaly, the transition zone between locations exhibiting high thermal gradients and those exhibiting regional thermal gradients is quite narrow. Thermal gradients rise from near regional (0.09 C/m) to extreme (0.83 C/m) in only 2.4 km. The heat flow in the central part of the anomaly is >600 mW/m{sup 2} and in some areas exceeds 1200 mW/m{sup 2}. The shape of the thermal anomaly is asymmetric with respect to the line of volcanoes previously thought to represent the center of the field, with its center line offset south of the volcanic buttes. There is no broad thermal anomaly associated with the magnetic high that extends offshore to the northeast from the volcanic domes. These observations of the thermal anomaly provide important constraints for models of the circulation of the hydrothermal system. Thermal budgets based on a simple model for this hydrothermal system indicate that the heat influx rate for local ''hot spots'' in the region may be large enough to account for the rate of heat flux from the entire Salton Trough.

Newmark, R. L.; Kasameyer, P. W.; Younker, L. W.

1987-01-01T23:59:59.000Z

237

Ocean Navitas | Open Energy Information  

Open Energy Info (EERE)

Navitas Navitas Jump to: navigation, search Name Ocean Navitas Address Nursery House Place United Kingdom Zip DN21 5BQ Sector Ocean Product Ocean Navitas was incorporated in May 2006 by experienced engineers, businessmen and sailing enthusiasts David Hunt, James McCague and Simon Condry. Website http://www.oceannavitas.com Region United Kingdom References Ocean NavitasUNIQ75db538f85b32404-ref-000014E2-QINU LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: Ocean Navitas NaREC This company is involved in the following MHK Technologies: Aegir Dynamo This article is a stub. You can help OpenEI by expanding it.

238

Ocean - FAQ | Data.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FAQ FAQ Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov » Communities » Ocean Frequently Asked Questions Following are some Frequently Asked Questions, we hope to add to this list as we hear from you. Questions What is Ocean.data.gov? How can I use this resource? What data can I expect to find here? Where do these data come from? Can data from State and academic sources be included in this portal? Who can suggest data and information to be included in Ocean.data.gov? Who decides what data are included? How do I get involved? How does this differ from other data efforts such as regional data portals? Where do I find information about data standards, metadata standards, and formats? Can we provide feedback about a particular dataset?

239

Mesoscale Coupled Ocean-Atmosphere Interaction  

E-Print Network [OSTI]

heat flux, and wind power input to the ocean. Geophys. Res.Powers and Stoelinga (2000). They developed a comprehensive atmosphere-ocean-

Seo, Hyodae

2007-01-01T23:59:59.000Z

240

Mesoscale coupled ocean-atmosphere interaction  

E-Print Network [OSTI]

heat flux, and wind power input to the ocean. Geophys. Res.Powers and Stoelinga (2000). They developed a comprehensive atmosphere-ocean-

Seo, Hyodae

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Aspects of modeling the North Pacific Ocean.  

E-Print Network [OSTI]

??Three aspects of the problem of modeling North Pacific Ocean climate are investigated: the effect of viscosity on effective model resolution, the effect of ocean… (more)

Dawe, Jordan Tyler

2006-01-01T23:59:59.000Z

242

Herzig, P.M., Humphris, S.E., Miller, D.J., and Zierenberg, R.A. (Eds.), 1998 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 158  

E-Print Network [OSTI]

and related hydrothermal processes (RIDGE, 1992; Ocean Drilling Program [ODP], 1996). Conduction through of the Ocean Drilling Program, Scientific Results, Vol. 158 329 24. THERMAL PROPERTIES OF TAG HYDROTHERMAL hydrothermal field, located in the rift valley of the Mid-Atlantic Ridge near 26°N, 45°W. Thermal conductivity

243

Scattering polarization in the CaII Infrared Triplet with Velocity Gradients  

E-Print Network [OSTI]

Magnetic field topology, thermal structure and plasma motions are the three main factors affecting the polarization signals used to understand our star. In this theoretical investigation, we focus on the effect that gradients in the macroscopic vertical velocity field have on the non-magnetic scattering polarization signals, establishing the basis for general cases. We demonstrate that the solar plasma velocity gradients have a significant effect on the linear polarization produced by scattering in chromospheric spectral lines. In particular, we show the impact of velocity gradients on the anisotropy of the radiation field and on the ensuing fractional alignment of the CaII levels, and how they can lead to an enhancement of the zero-field linear polarization signals. This investigation remarks the importance of knowing the dynamical state of the solar atmosphere in order to correctly interpret spectropolarimetric measurements, which is important, among other things, for establishing a suitable zero field refe...

Carlin, E S; Ramos, A Asensio; Bueno, J Trujillo

2012-01-01T23:59:59.000Z

244

Salinity gradient solar pond technology applied to potash solution mining  

SciTech Connect (OSTI)

A solution mining facility at the Eddy Potash Mine, Eddy County, New Mexico has been proposed that will utilize salinity gradient solar pond (SGSP) technology to supply industrial process thermal energy. The process will include underground dissolution of potassium chloride (KCl) from pillars and other reserves remaining after completion of primary room and pillar mining using recirculating solutions heated in the SGSP. Production of KCl will involve cold crystallization followed by a cooling pond stage, with the spent brine being recirculated in a closed loop back to the SGSP for reheating. This research uses SGSP as a renewable, clean energy source to optimize the entire mining process, minimize environmental wastes, provide a safe, more economical extraction process and reduce the need for conventional processing by crushing, grinding and flotation. The applications of SGSP technology will not only save energy in the extraction and beneficiation processes, but also will produce excess energy available for power generation, desalination, and auxiliary structure heating.

Martell, J.A.; Aimone-Martin, C.T.

2000-06-12T23:59:59.000Z

245

Acoustical power amplification and damping by temperature gradients  

Science Journals Connector (OSTI)

Ceperley proposed a concept of a traveling wave heat engine [“A pistonless Stirling engine—The traveling wave heat engine ” J. Acoust. Soc. Am. 66 1508–1513 (1979).] that provided a starting point of thermoacoustics today. This paper verifies experimentally his idea through observation of amplification and strong damping of a plane acoustic traveling wave as it passes through axial temperature gradients. The acoustic power gain is shown to obey a universal curve specified by a dimensionless parameter ???; ? is the angular frequency and ?? is the relaxation time for the gas to thermally equilibrate with channel walls. As an application of his idea a three-stage acoustic power amplifier is developed which attains the gain up to 10 with a moderate temperature ratio of 2.3.

Tetsushi Biwa; Ryo Komatsu; Taichi Yazaki

2011-01-01T23:59:59.000Z

246

A Detailed Thermal Analysis of the Binospec Spectrograph  

E-Print Network [OSTI]

Refractive optics in astronomical instruments are potentially sensitive to temperature gradients and temperature transients. This sensitivity arises from thermally dependent refractive indices, lens spacings, and lens dimensions. We have therefore undertaken a detailed thermal analysis of Binospec, a wide-field optical spectrograph under development for the converted MMT. Our goals are to predict the temperature gradients that will be present in the Binospec optics and structure under realistic operating conditions and to determine how design choices affect these gradients. We begin our analysis by deriving thermal time constants for instrument subassemblies. We then generate a low-resolution finite difference model of the entire instrument and high-resolution models of sensitive subassemblies. This approach to thermal analysis is applicable to a variety of other instruments. We use measurements of the ambient temperature in the converted MMT's dome to model Binospec's thermal environment. During moderate conditions we find that the Binospec lens groups develop 0.14 C axial and radial temperature gradients and that lens groups of different mass develop 0.5 C temperature differences; these numbers are doubled for the extreme conditions. Internal heat sources do not significantly affect these results; heat flow from the environment dominates. The instrument must be periodically opened to insert new aperture masks, but we find that the resulting temperature gradients and thermal stresses in the optics are small. Image shifts at the detector caused by thermal deflections of the Binospec optical bench structure are approx 0.1 pixel/hr. We conclude that the proposed Binospec design has acceptable thermal properties, and briefly discuss design changes to further reduce temperature gradients.

Warren R. Brown; Daniel G. Fabricant; David A. Boyd

2002-10-28T23:59:59.000Z

247

Lattice Boltzmann approach to thermal transpiration  

SciTech Connect (OSTI)

Diffuse reflection boundary conditions are introduced in a thermal lattice Boltzmann model to allow for variable fluid density and temperature along the walls. The capability of this model to capture the main characteristics of the thermal transpiration phenomenon in a box at nonvanishing Knudsen numbers is demonstrated. The thermal creep velocity is found to be proportional to the temperature gradient imposed at the wall, whereas the accuracy of the simulation results are found to be of first or second order, depending on the numerical scheme.

Sofonea, Victor [Center for Fundamental and Advanced Technical Research, Romanian Academy, Bd. Mihai Viteazul 24, RO - 300223 Timisoara (Romania)

2006-11-15T23:59:59.000Z

248

Lattice Boltzmann model for thermal transpiration  

Science Journals Connector (OSTI)

The conventional Navier-Stokes-Fourier equations with no-slip boundary conditions are unable to capture the phenomenon of gas thermal transpiration. While kinetic approaches such as the direct simulation Monte Carlo method and direct solution of the Boltzmann equation can predict thermal transpiration, these methods are often beyond the reach of current computer technology, especially for complex three-dimensional flows. We present a computationally efficient nonequilibrium thermal lattice Boltzmann model for simulating temperature-gradient-induced flows. The good agreement between our model and kinetic approaches demonstrates the capabilities of the proposed lattice Boltzmann method.

G. H. Tang; Y. H. Zhang; X. J. Gu; R. W. Barber; D. R. Emerson

2009-02-12T23:59:59.000Z

249

Lattice Boltzmann approach to thermal transpiration  

Science Journals Connector (OSTI)

Diffuse reflection boundary conditions are introduced in a thermal lattice Boltzmann model to allow for variable fluid density and temperature along the walls. The capability of this model to capture the main characteristics of the thermal transpiration phenomenon in a box at nonvanishing Knudsen numbers is demonstrated. The thermal creep velocity is found to be proportional to the temperature gradient imposed at the wall, whereas the accuracy of the simulation results are found to be of first or second order, depending on the numerical scheme.

Victor Sofonea

2006-11-16T23:59:59.000Z

250

Transient hydrodynamic, heat and mass transfer in a salinity gradient solar pond: A numerical study  

Science Journals Connector (OSTI)

Abstract The impoverishment of our planet in non-renewable energies has incited researchers to design salinity gradient solar ponds to collect and store solar energy at a lower cost. It is in this context that the present research work lies to focus on the numerical study of the transient hydrodynamic, heat and mass transfer in a salinity gradient solar pond. The problem is tackled using the dimensionless governing equations of Navier–Stokes, thermal energy and mass transfer, which are solved numerically by finite-volume method to provide the temperature, concentration and velocity fields in transient regime. The pond is filled with salty water of various salinities to form three zones of salty water: Upper Convective Zone (UCZ), Non-Convective Zone (NCZ) and Lower Convective Zone (LCZ). To prevent convective movements induced by the internal heating of salty water due to solar radiation absorption, a salinity gradient is used in the solar pond. Representative results illustrating the influence of internal Rayleigh number on the thermal performance of the pond and the effect of the aspect ratio on the distribution of temperature and velocity fields in the salinity gradient solar pond (SGSP) are discussed. In addition, results for the transient average temperature of UCZ and LCZ are presented and discussed for various parametric conditions.

Ridha Boudhiaf; Mounir Baccar

2014-01-01T23:59:59.000Z

251

A REVIEW OF GLOBAL OCEAN TEMPERATURE OBSERVATIONS: IMPLICATIONS FOR OCEAN  

E-Print Network [OSTI]

by taking an inventory of changes in energy storage. The main storage is in the ocean, the latest values, Energy Sustainable Economic, Earth's energy imbalance, and thermosteric sea level rise. Up-to-date estimates are provided

252

composition of putative oceans on  

E-Print Network [OSTI]

#12;Results: Oceanic water composition · Oceanic water is a NaCl-CaCl2 solution · Large Cl mass · Cl in a "soda ocean" Temperature, o C 100 200 300 400 500 Concentration,mole/kgH2O 0.01 0.1 1 Cl- CaCl2 CaCl+ Na calcite · Quartz · Na-K feldspars · Anhydrite · Pyrite · Hematite/magnetite · Evaporites: NaCl+CaCl2 350o

Treiman, Allan H.

253

Effects of Matrix Cracks on the Thermal Diffusivity of a Fiber-Reinforced Ceramic Composite  

E-Print Network [OSTI]

when the material is subjected to temperature gradients and is therefore relevant to its thermal shock resistance. The present study focuses on the effects of a periodic array of matrix cracks on thermal displacement are used to determine the contributions to the longitudinal thermal resistance due to each crack

Zok, Frank

254

The long range migration of hydrogen through Zircaloy in response to tensile and compressive stress gradients  

SciTech Connect (OSTI)

Zircaloy-4, which is used widely as a core structural material in pressurized water reactors (PWRs), picks up hydrogen during service. Hydrogen solubility in Zircaloy-4 is low and zirconium hydride phases precipitate after the Zircaloy-4 lattice becomes supersaturated with hydrogen. These hydrides embrittle the Zircaloy-4, degrading its mechanical performance as a structural material. Because hydrogen can move rapidly through the Zircaloy-4 lattice, the potential exists for large concentrations of hydride to accumulate in local regions of a Zircaloy component remote from its point of entry into the component. Much has been reported in the literature regarding the long range migration of hydrogen through Zircaloy under concentration gradients and temperature gradients. Relatively little has been reported, however, regarding the long range migration of hydrogen under stress gradients. This paper presents experimental results regarding the long range migration of hydrogen through Zircaloy in response to both tensile and compressive stress gradients. The importance of this driving force for hydrogen migration relative to concentration and thermal gradients is discussed.

Kammenzind, B.F.; Berquist, B.M.; Bajaj, R.; Kreyns, P.H.; Franklin, D.G.

1998-11-01T23:59:59.000Z

255

Formation of morphogen gradients: Local accumulation time  

Science Journals Connector (OSTI)

Spatial regulation of cell differentiation in embryos can be provided by morphogen gradients, which are defined as the concentration fields of molecules that control gene expression. For example, a cell can use its surface receptors to measure the local concentration of an extracellular ligand and convert this information into a corresponding change in its transcriptional state. We characterize the time needed to establish a steady-state gradient in problems with diffusion and degradation of locally produced chemical signals. A relaxation function is introduced to describe how the morphogen concentration profile approaches its steady state. This function is used to obtain a local accumulation time that provides a time scale that characterizes relaxation to steady state at an arbitrary position within the patterned field. To illustrate the approach we derive local accumulation times for a number of commonly used models of morphogen gradient formation.

Alexander M. Berezhkovskii; Christine Sample; Stanislav Y. Shvartsman

2011-05-06T23:59:59.000Z

256

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

1979, Rosslyn, VA. U.S. Dept. of Energy and Argonne NationalLaboratory, Argonne, IL. ANL/OTEC- BCM-002. Bretschneider,Environmental Systems Division, Argonne National Laboratory.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

257

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

stored on the platform and these two chemicals will explodeChemical Categories Nutrients Dissolved Oxygen Biological Categories Phyto- plankton Zooplankton lchthyo- plankton Micro- nekton Nekton Hammals, Birds Benthos Issue Platform

Sullivan, S.M.

2014-01-01T23:59:59.000Z

258

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

stored on the platform and these two chemicals will explodeplatform continuously releases chlorine along with its discharge waters at a concentration of 0.1 mg liter . Chemical

Sullivan, S.M.

2014-01-01T23:59:59.000Z

259

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

stored on the platform and these two chemicals explode whenhandling chemical contaminants on OTEC platforms. The Coastof chemicals or processes used on OTEC platforms, there is a

Sands, M. D.

2011-01-01T23:59:59.000Z

260

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Division of Central Solar Technology, U.s. Dept. of Energy.Div. of Central Solar Technology. U.S. Dept. of Energy.Division of Central Solar Technology, u.s. Dept. of Energy.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Div. of Central Solar Technology. U.S. Dept. of Energy.Division of Central Solar Technology. , U.S. Dept. ofDivision of Central Solar Technology. USDOE paper 7D-3/1.

Sands, M. D.

2011-01-01T23:59:59.000Z

262

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Div. of Central Solar Technology. U.S. Dept. of Energy.Division of Central Solar Technology, U.S. Dept. of Energy.Division of Central Solar Technology, U.S. Dept. of Energy.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

263

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

delivered to the local power grid either directly (for Land-Oahu, Hawaii) • • • • Electrical Power Grid for Oahu,Hawaii Electrical Power Grid for Key West, Florida ••

Sullivan, S.M.

2014-01-01T23:59:59.000Z

264

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Oahu, Hawaii) • . • • . Electrical Power Grid for Oahu,Hawaii • • • Electrical Power Grid for Key West,Florida • • . • . . Electrical Power Grid for Puerto

Sullivan, S.M.

2014-01-01T23:59:59.000Z

265

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Occupational Safety and Health Administration (OSHA) safety, and the Coast Guard covers mar1ne covers some offshore

Sands, M. D.

2011-01-01T23:59:59.000Z

266

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

SciTech Connect (OSTI)

This programmatic environmental analysis is an initial assessment of OTEC technology considering development, demonstration and commercialization; it is concluded that the OTEC development program should continue because the development, demonstration, and commercialization on a single-plant deployment basis should not present significant environmental impacts. However, several areas within the OTEC program require further investigation in order to assess the potential for environmental impacts from OTEC operation, particularly in large-scale deployments and in defining alternatives to closed-cycle biofouling control: (1) Larger-scale deployments of OTEC clusters or parks require further investigations in order to assess optimal platform siting distances necessary to minimize adverse environmental impacts. (2) The deployment and operation of the preoperational platform (OTEC-1) and future demonstration platforms must be carefully monitored to refine environmental assessment predictions, and to provide design modifications which may mitigate or reduce environmental impacts for larger-scale operations. These platforms will provide a valuable opportunity to fully evaluate the intake and discharge configurations, biofouling control methods, and both short-term and long-term environmental effects associated with platform operations. (3) Successful development of OTEC technology to use the maximal resource capabilities and to minimize environmental effects will require a concerted environmental management program, encompassing many different disciplines and environmental specialties.

Sands, M. D.

1980-01-01T23:59:59.000Z

267

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Mexico. Energy Research and Development Administration, Division of SolarMexico. Energy Research and Development Administration, Division of Solar

Sands, M. D.

2011-01-01T23:59:59.000Z

268

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

50 ing a turning basin in the bight. (See Notice to Marinersbasin to a basin in the SW part of the bight. In 1972. theturning basin just in- side the entrance of Garrison Bight.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

269

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

upper turning basin off Key West Bight, and then 12 feet toso ing a turnmg basin in the bight. (See Nutice to :V1annersbasin to a basin in the SW part of the bight. ln 197 2. the

Sullivan, S.M.

2014-01-01T23:59:59.000Z

270

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

la. Supplies and repairs. - Bunker C. die-,el oib. and wateragricultur- Supplies. -No bunkers are available; in emergen·3, Vessel Arrival In- cies bunkers and lube oils may be

Sullivan, S.M.

2014-01-01T23:59:59.000Z

271

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

de Ratones. Supplies. -No bunkers are available; in emergen-and agricultur· cies bunkers and lube oils may be deliveredr'..:w h'>urs. Fr..:shwater. bunker C otl. and dtesd oil are

Sullivan, S.M.

2014-01-01T23:59:59.000Z

272

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

aspects of siting OTEC plants offshore the United States ongas. phosgene Offshore ammonia plant-ships will presentan facility offshore may expose the plant to power outages

Sands, M. D.

2011-01-01T23:59:59.000Z

273

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

fossil-fuel intake canals for withdrawing marine waters;Some marine supplies and water are available. Bunker fuels.marine ecosystem effects caused by Pilot Plant operation are associated with the seawater discharge and approximately fossil-fuel

Sullivan, S.M.

2014-01-01T23:59:59.000Z

274

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

fuel or nuclear-powered plants use intake canals for withdrawing marineSome marine supplies and water are available. Uunker fuels.marine supplies are available at Key West. Gasoline and diesel fuel

Sullivan, S.M.

2014-01-01T23:59:59.000Z

275

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

seawater. produce can be generated electrolytically Producing chlorine on an OTEC plant eliminates storage

Sands, M. D.

2011-01-01T23:59:59.000Z

276

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Electricity - Hawaii is almost totally dependent upon imported petroleum A natural energy source of geothermal

Sands, M. D.

2011-01-01T23:59:59.000Z

277

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

W of Fort Taylor. the flood (NNE) and the ebb (SSW) currentswas available in the Largo; it floods S and ebbs NW. Islacurrents u: ~1aunalua Bav flood W and ebb E: slack watci'

Sullivan, S.M.

2014-01-01T23:59:59.000Z

278

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

reported that a tidal current floods W and ebbs E along thethe authority for navigation, flood control, and productionW of Fort Taylor, the flood (NNE) and the ebb (SSW) currents

Sullivan, S.M.

2014-01-01T23:59:59.000Z

279

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

ECONOMIC ISSUES Baseload Electricity Baseload electricity production in the Gulf Coast States relies primarily on oil, natural gas, and coal.

Sands, M. D.

2011-01-01T23:59:59.000Z

280

Heat Content Changes in the Pacific Ocean  

E-Print Network [OSTI]

Heat Content Changes in the Pacific Ocean The Acoustic Thermometry of Ocean Cli- mate (ATOC assimilating ocean observations and changes expected from surface heat fluxes as measured by the daily National are a result of advection of heat by ocean currents. We calculate that the most likely cause of the discrepancy

Frandsen, Jannette B.

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

High-pressure liquid chromatographic gradient mixer  

DOE Patents [OSTI]

A gradient mixer effects the continuous mixing of any two miscible solvents without excessive decay or dispersion of the resultant isocratic effluent or of a linear or exponential gradient. The two solvents are fed under low or high pressure by means of two high performance liquid chromatographic pumps. The mixer comprises a series of ultra-low dead volume stainless steel tubes and low dead volume chambers. The two solvent streams impinge head-on at high fluxes. This initial nonhomogeneous mixture is then passed through a chamber packed with spirally-wound wires which cause turbulent mixing thereby homogenizing the mixture with minimum band-broadening.

Daughton, C.G.; Sakaji, R.H.

1982-09-08T23:59:59.000Z

282

Ocean Sci., 3, 417427, 2007 www.ocean-sci.net/3/417/2007/  

E-Print Network [OSTI]

Deacon Cell. When the ocean currents are averaged zon- ally to produce a meridional overturningOcean Sci., 3, 417­427, 2007 www.ocean-sci.net/3/417/2007/ © Author(s) 2007. This work is licensed under a Creative Commons License. Ocean Science On the fast response of the Southern Ocean to changes

Paris-Sud XI, Université de

283

Silicic acid leakage from the Southern Ocean: Opposing effects of nutrient uptake and oceanic circulation  

E-Print Network [OSTI]

to the thermocline region of low latitudes. The power of Southern Ocean intermediate waters to affect phytoplanktonSilicic acid leakage from the Southern Ocean: Opposing effects of nutrient uptake and oceanic in formation rate of Southern Ocean intermediate waters. Comparison of d30 Si records from the Southern Ocean

Pahnke, Katharina

284

Toward Energetically Consistent Ocean Models  

Science Journals Connector (OSTI)

Possibilities to construct a realistic quasi-global ocean model in Boussinesq approximation with a closed energy cycle are explored in this study. In such a model, the energy related to the mean variables would interact with all parameterized ...

Carsten Eden; Lars Czeschel; Dirk Olbers

2014-12-01T23:59:59.000Z

285

Ocean Currents at Rocas Alijos  

Science Journals Connector (OSTI)

The flow of oceanic water over and around an obstacle such as a seamount or island has the potential to profoundly affect the local biological community (Hamner and Hauri, 1986; Wolanski and Hamner, 1988). If ...

Shirley Vaughan; Ronald K. Skinner; Robert W. Schmieder; Brian McGuire

1996-01-01T23:59:59.000Z

286

Conference on oceans draws Clinton  

Science Journals Connector (OSTI)

Against the tranquil backdrop of Monterey Bay, Calif., President Bill Clinton earlier this month signed a measure extending the U.S. ban on offshore oil drilling, and he proposed several sweeping initiatives to protect, restore, and explore the oceans....

ELIZABETH WILSON

1998-06-22T23:59:59.000Z

287

Pacific Ocean Islands – Editorial Introduction  

Science Journals Connector (OSTI)

Islands in the Pacific Ocean are of three kinds (Nunn 2005). ... Most of the islands lie in the SW Pacific, but the Galapagos, Clipperton, and Easter ... Island are volcanic islands rising from the East Pacific R...

2010-01-01T23:59:59.000Z

288

DSM Will Acquire Ocean Nutrition  

Science Journals Connector (OSTI)

DSM Will Acquire Ocean Nutrition ... Dutch chemical maker DSM will spend about $530 million to acquire Ocean Nutrition Canada, which calls itself the world’s largest supplier of omega-3 fatty acids to the dietary supplement and food manufacturing markets. ... DSM says the acquisition is the fifth purchase it has made in the nutrition field since September 2010, when it announced a corporate strategy to expand in the health, nutrition, and industrial materials markets. ...

MICHAEL MCCOY

2012-05-28T23:59:59.000Z

289

Marine Microbes See a Sea of Gradients  

Science Journals Connector (OSTI)

...Kirchman D. L. , Activity of abundant and rare bacteria in a coastal ocean . Proc. Natl. Acad. Sci. U.S.A. 108 , 12776 ( 2011 ). 10.1073/pnas.1101405108 21768380 10.1073/pnas.1101405108 33 Musat N. ., A single-cell view on the...

Roman Stocker

2012-11-02T23:59:59.000Z

290

Photopolymerization in Microfluidic Gradient Generators: Microscale  

E-Print Network [OSTI]

-compliance profiles that are tunable on the micro- scale. The most straightforward way to create substrates with vari through the development of microfluidic networks,[7,8] with which one can easily generate solution (e microscale gradients with microfluidic networks, and a recent study that demon- strated

291

Porting the NAS-NPB Conjugate Gradient  

E-Print Network [OSTI]

Porting the NAS-NPB Conjugate Gradient Benchmark to CUDA NVIDIA Corporation #12;Outline ! Overview of CG benchmark ! Overview of CUDA Libraries ! CUSPARSE ! CUBLAS ! Porting Sequence ! Algorithm Analysis ! Data/Code Analysis This porting approach uses CUDA Libraries exclusively. (We will not write

Crawford, T. Daniel

292

Fourier Accelerated Conjugate Gradient Lattice Gauge Fixing  

E-Print Network [OSTI]

We provide details of the first implementation of a non-linear conjugate gradient method for Landau and Coulomb gauge fixing with Fourier acceleration. We find clear improvement over the Fourier accelerated steepest descent method, with the average time taken for the algorithm to converge to a fixed, high accuracy, being reduced by a factor of 2 to 4.

R. J. Hudspith

2014-05-22T23:59:59.000Z

293

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thermal Desorption Ionization Mass Spectrometer (TDCIMS) Thermal Desorption Ionization Mass Spectrometer (TDCIMS) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Thermal Desorption Ionization Mass Spectrometer (TDCIMS) 2014.01.01 - 2014.10.31 Lead Scientist : Jim Smith Description As part of both GoAmazon2014 IOPs, the Thermal Desorption Chemical Ionization Mass Spectrometer (TDCIMS) will perform measurements of the molecular composition of 10-50 nm diameter particles. TDCIMS observations will be used to address two objectives the GoAmazon. For studying the interactions between anthropogenic and biogenic emissions, the TDCIMS will

294

Gradient zone-boundary control in salt-gradient solar ponds  

DOE Patents [OSTI]

A method and apparatus for suppressing zone boundary migration in a salt gradient solar pond includes extending perforated membranes across the pond at the boundaries, between the convective and non-convective zones, the perforations being small enough in size to prevent individual turbulence disturbances from penetrating the hole, but being large enough to allow easy molecular diffusion of salt thereby preventing the formation of convective zones in the gradient layer. The total area of the perforations is a sizeable fraction of the membrane area to allow sufficient salt diffusion while preventing turbulent entrainment into the gradient zone.

Hull, J.R.

1982-09-29T23:59:59.000Z

295

Ocean Barrier Layers’ Effect on Tropical Cyclone Intensification  

SciTech Connect (OSTI)

Improving a tropical cyclone's forecast and mitigating its destructive potential requires knowledge of various environmental factors that influence the cyclone's path and intensity. Herein, using a combination of observations and model simulations, we systematically demonstrate that tropical cyclone intensification is significantly affected by salinity-induced barrier layers, which are 'quasi-permanent' features in the upper tropical oceans. When tropical cyclones pass over regions with barrier layers, the increased stratification and stability within the layer reduce storm-induced vertical mixing and sea surface temperature cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, an intensification of tropical cyclones. On average, the tropical cyclone intensification rate is nearly 50% higher over regions with barrier layers, compared to regions without. Our finding, which underscores the importance of observing not only the upper-ocean thermal structure but also the salinity structure in deep tropical barrier layer regions, may be a key to more skillful predictions of tropical cyclone intensities through improved ocean state estimates and simulations of barrier layer processes. As the hydrological cycle responds to global warming, any associated changes in the barrier layer distribution must be considered in projecting future tropical cyclone activity.

Balaguru, Karthik; Chang, P.; Saravanan, R.; Leung, Lai-Yung R.; Xu, Zhao; Li, M.; Hsieh, J.

2012-09-04T23:59:59.000Z

296

Upper-Ocean Processes under the Stratus Cloud Deck in the Southeast Pacific Ocean  

Science Journals Connector (OSTI)

The annual mean heat budget of the upper ocean beneath the stratocumulus/stratus cloud deck in the southeast Pacific is estimated using Simple Ocean Data Assimilation (SODA) and an eddy-resolving Hybrid Coordinate Ocean Model (HYCOM). Both are ...

Yangxing Zheng; George N. Kiladis; Toshiaki Shinoda; E. Joseph Metzger; Harley E. Hurlburt; Jialin Lin; Benjamin S. Giese

2010-01-01T23:59:59.000Z

297

Open ocean DMS air/sea fluxes over the eastern South Pacific Ocean  

E-Print Network [OSTI]

over the North Pacific Ocean, J. Geophys. Res. - Atmos. ,air/sea fluxes over S. Pacific Ocean References Asher, W.in the equa- torial Pacific Ocean ( 1982 to 1996): Evidence

Marandino, C. A; De Bruyn, W. J; Miller, S. D; Saltzman, E. S

2009-01-01T23:59:59.000Z

298

Thermal treatment  

Science Journals Connector (OSTI)

Thermal treatment can be regarded as either a pre-treatment of waste prior to final disposal, or as a means of valorising waste by recovering energy. It includes both the burning of mixed MSW in municipal inciner...

Dr. P. White; Dr. M. Franke; P. Hindle

1995-01-01T23:59:59.000Z

299

Thermal Processes  

Broader source: Energy.gov [DOE]

Some thermal processes use the energy in various resources, such as natural gas, coal, or biomass, to release hydrogen, which is part of their molecular structure. In other processes, heat, in...

300

Geothermal Resource-Reservoir Investigations Based On Heat Flow And Thermal  

Open Energy Info (EERE)

Resource-Reservoir Investigations Based On Heat Flow And Thermal Resource-Reservoir Investigations Based On Heat Flow And Thermal Gradient Data For The United States Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geothermal Resource-Reservoir Investigations Based On Heat Flow And Thermal Gradient Data For The United States Details Activities (2) Areas (2) Regions (0) Abstract: Several activities related to geothermal resources in the western United States are described in this report. A database of geothermal site-specific thermal gradient and heat flow results from individual exploration wells in the western US has been assembled. Extensive temperature gradient and heat flow exploration data from the active exploration of the 1970's and 1980's were collected, compiled, and synthesized, emphasizing previously unavailable company data. Examples of

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Fusion product measurements of the local ion thermal diffusivity in the PLT tokamak  

SciTech Connect (OSTI)

Measurement of the gradient of the d-d fusion rate profile in an ohmic PLT plasma is used to deduce the gradient of the ion temperature and, thus, the local ion thermal diffusivity through an energy balance analysis. The inferred ion diffusivity is consistent with neoclassical theory.

Heidbrink, W.W.; Lovberg, J.; Strachan, J.D.; Bell, R.E.

1986-03-01T23:59:59.000Z

302

Persistent Organic Pollutants in the Equatorial Atmosphere over the Open Indian Ocean  

Science Journals Connector (OSTI)

Due to a 30% decline in the power of the air sampler, it was replaced by a 220-V AC H8400TE air sampler with a variable flow rate and a thermally protected motor for onward sample collection. ... Samples collected at Stations S1 and S2 originated from the northern and eastern coastal regions of Australia, but those collected at Station S3 and S5 are oceanic in origin, crossing the open ocean for 5 days prior to sampling. ... Concns. of organochlorines such as hexachlorocyclohexanes (HCHs), DDTs, chlordanes, and PCBs were detd. in the air and surface water from various oceans in 1989-1990, to study their recent distribution and the function of the ocean in the long-range atm. ...

Oliver Wurl; John Robert Potter; Jeffrey Philip Obbard; Caroline Durville

2006-01-21T23:59:59.000Z

303

Dielectric-Lined High-Gradient Accelerator Structure  

SciTech Connect (OSTI)

Rectangular particle accelerator structures with internal planar dielectric elements have been studied, with a view towards devising structures with lower surface fields for a given accelerating field, as compared with structures without dielectrics. Success with this concept is expected to allow operation at higher accelerating gradients than otherwise on account of reduced breakdown probabilities. The project involves studies of RF breakdown on amorphous dielectrics in test cavities that could enable high-gradient structures to be built for a future multi-TeV collider. The aim is to determine what the limits are for RF fields at the surfaces of selected dielectrics, and the resulting acceleration gradient that could be achieved in a working structure. The dielectric of principal interest in this study is artificial CVD diamond, on account of its advertised high breakdown field ({approx}2 GV/m for dc), low loss tangent, and high thermal conductivity. Experimental studies at mm-wavelengths on materials and structures for achieving high acceleration gradient were based on the availability of the 34.3 GHz third-harmonic magnicon amplifier developed by Omega-P, and installed at the Yale University Beam Physics Laboratory. Peak power from the magnicon was measured to be about 20 MW in 0.5 {micro}s pulses, with a gain of 54 dB. Experiments for studying RF high-field effects on CVD diamond samples failed to show any evidence after more than 10{sup 5} RF pulses of RF breakdown up to a tangential surface field strength of 153 MV/m; studies at higher fields were not possible due to a degradation in magnicon performance. A rebuild of the tube is underway at this writing. Computed performance for a dielectric-loaded rectangular accelerator structure (DLA) shows highly competitive properties, as compared with an existing all-metal structure. For example, comparisons were made of a DLA structure having two planar CVD diamond elements with a all-metal CERN structure HDS operating at 30 GHz. It was shown that the ratio of maximum surface electric field to accelerating field at the metal wall is only 0.35-0.4 for DLA, much smaller than the value 2.2 for HDS; and the ratio of surface magnetic field to accelerating field is 3.0 mA/V for DLA, compared with 3.45 mA/V for HDS. These values bode well for DLA in helping to avoid breakdown and to reducing pulsed surface heating and fatigue. The shunt impedance is found to be 160-175 M{Omega}/m for DLA, as compared to 99 M{Omega}/m for HDS. Conclusions are reached from this project that CVD diamond appears promising as a dielectric with a high threshold for RF breakdown, and that rectangular accelerator structures can be devised using planar CVD diamond elements that could be operated at higher acceleration gradients with low probability of RF breakdown, as compared with corresponding all-metallic structures.

Jay L. Hirshfield

2012-04-24T23:59:59.000Z

304

Continental insulation, mantle cooling, and the surface area of oceans and continents  

E-Print Network [OSTI]

Continental insulation, mantle cooling, and the surface area of oceans and continents A. Lenardica May 2005 Abstract It is generally assumed that continents, acting as thermal insulation above. The theory predicts that parameter regimes exist for which increased continental insulation has no effect

Manga, Michael

305

Physics of Atmospheres and Oceans: Class Question Sheets COMPARATIVE PLANETARY ATMOSPHERES  

E-Print Network [OSTI]

is the mass of Jupiter and R its radius. Assuming this is all converted to thermal energy, give a crudePhysics of Atmospheres and Oceans: Class Question Sheets COMPARATIVE PLANETARY ATMOSPHERES PLA.1 for discounting the less popular of these? Show that the energy liberated during the collapse of a sphere of mass

Read, Peter L.

306

Electron profile stiffness and critical gradient studies  

SciTech Connect (OSTI)

Electron profile stiffness was studied in DIII-D L-mode discharges by systematically varying the heat flux in a narrow region with electron cyclotron heating and measuring the local change produced in {nabla}T{sub e}. Electron stiffness was found to slowly increase with toroidal rotation velocity. A critical inverse temperature gradient scale length 1/L{sub C} {approx} 3 m{sup -1} was identified at {rho}=0.6 and found to be independent of rotation. Both the heat pulse diffusivity and the power balance diffusivity, the latter determined by integrating the measured dependence of the heat pulse diffusivity on -{nabla}T{sub e}, were fit reasonably well by a model containing a critical inverse temperature gradient scale length and varying linearly with 1/L{sub T} above the threshold.

DeBoo, J. C.; Petty, C. C.; Burrell, K. H.; Smith, S. P. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); White, A. E. [Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Doyle, E. J.; Hillesheim, J. C.; Rhodes, T. L.; Schmitz, L.; Wang, G.; Zeng, L. [University of California-Los Angeles, Los Angeles, California 90095-7099 (United States); Holland, C. [University of California-San Diego, La Jolla, California 92093-0417 (United States); McKee, G. R. [University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2012-08-15T23:59:59.000Z

307

Automated apparatus for producing gradient gels  

DOE Patents [OSTI]

Apparatus for producing a gradient gel which serves as a standard medium for a two-dimensional analysis of proteins, the gel having a density gradient along its height formed by a variation in gel composition, with the apparatus including first and second pumping means each including a plurality of pumps on a common shaft and driven by a stepping motor capable of providing small incremental changes in pump outputs for the gel ingredients, the motors being controlled, by digital signals from a digital computer, a hollow form or cassette for receiving the gel composition, means for transferring the gel composition including a filler tube extending near the bottom of the cassette, adjustable horizontal and vertical arms for automatically removing and relocating the filler tube in the next cassette, and a digital computer programmed to automatically control the stepping motors, arm movements, and associated sensing operations involving the filling operation.

Anderson, Norman L. (Clarendon Hills, IL)

1986-01-01T23:59:59.000Z

308

The Argonne Zero Gradient Synchrotron (ZGS)  

Science Journals Connector (OSTI)

A 12.5 billion electron volt (BeV) particle accelerator the Zero Gradient Synchrotron was constructed and put into operation at the Argonne National Laboratory in August 1963. The ZGS will form the center for high energy physics research in the Midwestern part of this country. In this paper a brief description of the ZGS is given together with a discussion of the aims methods and equipment of experimental high energy physics research.

L. C. Teng

1964-01-01T23:59:59.000Z

309

Ocean - Tools | Data.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tools Tools Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov » Communities » Ocean Decision-Support Tools (DSTs): Science and information are fundamental to effective marine planning. Marine planning involves inclusive discussion and analyses of the status and potential uses of 3-dimensional areas of coastal, marine and Great Lakes ecosystems (including the water column) and their potential changes over time. Relevant spatial data and derived interpretive and analytical products (i.e. decision-support tools) help inform all phases of the marine planning process. To date, several decision-support tools have been develop to support marine planning efforts. Marine planners should carefully evaluate which tools best apply to their region or specific issue or project. Below is a list of

310

The Boussinesq Problem in Dipolar Gradient Elasticity  

E-Print Network [OSTI]

The three-dimensional axisymmetric Boussinesq problem of an isotropic half-space subjected to a concentrated normal quasi-static load is studied within the framework of linear dipolar gradient elasticity. Our main concern is to determine possible deviations from the predictions of classical linear elastostatics when a more refined theory is employed to attack the problem. Of special importance is the behavior of the new solution near to the point of application of the load where pathological singularities exist in the classical solution. The use of the theory of gradient elasticity is intended here to model the response of materials with microstructure in a manner that the classical theory cannot afford. A linear version of this theory results by considering a linear isotropic expression for the strain-energy density that depends on strain-gradient terms, in addition to the standard strain terms appearing in classical elasticity. Through this formulation, a microstructural material constant is introduced, in addition to the standard Lam\\'e constants. The solution method is based on integral transforms and is exact. The present results show significant departure from the predictions of classical elasticity. Indeed, continuous and bounded displacements are predicted at the points of application of the concentrated load. Such a behavior of the displacement field is, of course, more natural than the singular behavior exhibited in the classical solution.

H. G. Georgiadis; P. A. Gourgiotis; D. S. Anagnostou

2014-03-31T23:59:59.000Z

311

FARADAYIC ElectroPhoretic Deposition of YSZ for Use in Thermal Barrier Coatings - Faraday Technology  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FARADAYIC ElectroPhoretic Deposition FARADAYIC ElectroPhoretic Deposition of YSZ for Use in Thermal Barrier Coatings-Faraday Technology Background Thermal barrier coatings (TBCs) are employed to protect gas turbine engine components. These coating systems provide thermal, oxidation, and mechanical protection; reduce thermal gradients; and lower the metal substrate surface temperature, extending the life of the engine components. Faraday Technology, Inc. (Faraday) is developing a new manufacturing process, the

312

Diversity and abundance of “Pelagibacterales” (SAR11) in the Baltic Sea salinity gradient  

Science Journals Connector (OSTI)

Abstract The candidate order “Pelagibacterales” (SAR11) is one of the most abundant bacterial orders in ocean surface waters and, periodically, in freshwater lakes. The presence of several stable phylogenetic lineages comprising “Pelagibacterales” correlates with the physico-chemical parameters in aquatic environments. A previous amplicon sequencing study covering the bacterial community in the salinity gradient of the Baltic Sea suggested that pelagibacteral subclade SAR11-I was replaced by SAR11-IIIa in the mesohaline region of the Baltic Sea. In this current study, we investigated the cellular abundances of “Pelagibacterales” subclades along the Baltic Sea salinity gradient using catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH). The results obtained with a newly designed probe, which exclusively detected SAR11-IIIa, were compared to CARD-FISH abundances of the marine SAR11-I/II subclade and the freshwater lineage SAR11-IIIb (LD12). The results showed that SAR11-IIIa was abundant in oligohaline–mesohaline conditions (salinities 2.7–13.3), with maximal abundances at a salinity of 7 (up to 35% of total Bacteria, quantified with a universal bacterial probe EUB). As expected, SAR11-I/II was abundant (27% of EUB) in the marine parts of the Baltic Sea, whereas counts of the freshwater lineage SAR11-IIIb were below the detection limit at all stations. The shift from SAR11-IIIa to SAR11-I/II was confirmed in the vertical salinity gradient in the deeper basins of the Baltic Sea. These findings were consistent with an overlapping but defined distribution of SAR11-I/II and SAR11-IIIa in the salinity gradient of the Baltic Sea and suggested the adaptation of SAR11-IIIa for growth and survival in mesohaline conditions.

Daniel P.R. Herlemann; Jana Woelk; Matthias Labrenz; Klaus Jürgens

2014-01-01T23:59:59.000Z

313

Gradient-based Methods for Production Optimization of Oil Reservoirs  

E-Print Network [OSTI]

Gradient-based Methods for Production Optimization of Oil Reservoirs Eka Suwartadi Doctoral Thesis oil reservoirs. Gradient- based optimization, which utilizes adjoint-based gradient computation optimization for water flooding in the secondary phase of oil recovery is the main topic in this thesis

Foss, Bjarne A.

314

Ocean Color Web | Data.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ocean Color Web Ocean Color Web Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov » Communities » Ocean » Data Ocean Color Web Dataset Summary Description A comprehensive image analysis package for the processing, display, analysis, and quality control of ocean color data. Tags {Ocean,"water color",spectrometer,"sea viewing",MODIS,"marine biology",NASA,GSFC,"Goddard Space Flight Center"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 15-Jan-2010 Publisher National Aeronautics and Space Administration Contact Name Contact Email Gene.C.Feldman@nasa.gov Unique Identifier NASA-1547

315

On Rayleigh Waves Across the Pacific Ocean  

Science Journals Connector (OSTI)

......research-article Articles On Rayleigh Waves Across the Pacific Ocean K. E. Bullen University College, Auckland, N. Z. ON RAYLEIGH WAVES ACROSS THE PACIFIC OCEAN K. E. Bullen (Received 1939November 9) The Bering......

K. E. Bullen

1939-12-01T23:59:59.000Z

316

Green Ocean Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Ocean Wave Air Piston This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleGreenOceanWaveEnergy&oldid769161...

317

Ocean Data Impacts in Global HYCOM  

Science Journals Connector (OSTI)

The impact of the assimilation of ocean observations on reducing global Hybrid Coordinate Ocean Model (HYCOM) 48-h forecast errors is presented. The assessment uses an adjoint-based data impact procedure that characterizes the forecast impact of ...

James A. Cummings; Ole Martin Smedstad

2014-08-01T23:59:59.000Z

318

Energy from the Ocean [and Discussion  

Science Journals Connector (OSTI)

...October 1982 research-article Energy from the Ocean [and Discussion...Lennard J. H. Turner P. Wadhams Renewable ocean energy sources can eventually supply a large fraction of man's energy needs, starting in the 1990s...

1982-01-01T23:59:59.000Z

319

Thermal conductivity of a kinetic ising model  

Science Journals Connector (OSTI)

Using a novel extension of the microcanonical Monte Carlo algorithm, we have simulated the behavior of a two-dimensional nearest-neighbor ferromagnetic Ising model in the presence of a temperature gradient. The technique consists of setting the temperatures of boundary spins, while allowing "demons" associated with the other sites to control heat transfer. We demonstrate that our system is in local thermodynamic equilibrium, and compute the thermal conductivity as a function of temperature.

R. Harris and Martin Grant

1988-11-01T23:59:59.000Z

320

Oceanic nutrient and oxygen transports and bounds on export production during the World Ocean Circulation Experiment  

E-Print Network [OSTI]

of intense climate interest. A large fraction of the carbon fixed in the oceanic surface waters is recycledOceanic nutrient and oxygen transports and bounds on export production during the World Ocean are estimated from selected hydrographic sections from the World Ocean Circulation Experiment spanning the world

Wunsch, Carl

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Ocean Mixing and Climate ChangeOcean Mixing and Climate Change Factors inducing seawater mixing  

E-Print Network [OSTI]

and the reverse current created when the fluid flows past an obstacle. Ocean Eddies range: cm-100 km. When two energy drives global winds ­ Latitudinal wind belts produce ocean currents · Determine circulation layer depth ~100 m · Heat transfer from equator to pole by ocean currents · Oceans redistribute about

Russell, Lynn

322

Ocean Sci., 4, 1529, 2008 www.ocean-sci.net/4/15/2008/  

E-Print Network [OSTI]

is everywhere perpendicular to the local direction of gravity. If there were no waves or currents in the oceanOcean Sci., 4, 15­29, 2008 www.ocean-sci.net/4/15/2008/ © Author(s) 2008. This work is licensed under a Creative Commons License. Ocean Science An Oceanographer's Guide to GOCE and the Geoid C. W

Paris-Sud XI, Université de

323

Ocean Sci., 3, 363377, 2007 www.ocean-sci.net/3/363/2007/  

E-Print Network [OSTI]

currents and water mass properties intriguing texture. In the upper ocean observational evidenceOcean Sci., 3, 363­377, 2007 www.ocean-sci.net/3/363/2007/ © Author(s) 2007. This work is licensed under a Creative Commons License. Ocean Science Variability of Antarctic intermediate Water properties

Boyer, Edmond

324

Indian Ocean Surface Circulations and Their Connection To Indian Ocean Dipole, Identified  

E-Print Network [OSTI]

Ocean Surface Currents Analysis Realtime (OSCAR) Data Advisor : Peter C Chu Second Reader : Charles Sun Aldisrupting Al--QaidaQaida''s networks network IraqIraq''s Instabilitys Instability #12;Ocean Surface Currents Analysis ­ Realtime (OSCAR) Data Base Ocean Surface currents data available for whole world' oceans at www

Chu, Peter C.

325

Ocean Science, 1, 97112, 2005 www.ocean-science.net/os/1/97/  

E-Print Network [OSTI]

oceanic currents by reducing the shears between them (Hansen and Paul, 1984; Weisberg, 1984Ocean Science, 1, 97­112, 2005 www.ocean-science.net/os/1/97/ SRef-ID: 1812-0792/os/2005-1-97 European Geosciences Union Ocean Science Multi-year satellite observations of instability waves

Paris-Sud XI, Université de

326

Ocean Sci., 3, 223228, 2007 www.ocean-sci.net/3/223/2007/  

E-Print Network [OSTI]

and regional sea level changes associated with changing currents and mass distribution in the ocean. The studyOcean Sci., 3, 223­228, 2007 www.ocean-sci.net/3/223/2007/ © Author(s) 2007. This work is licensed under a Creative Commons License. Ocean Science Towards measuring the meridional overturning circulation

Paris-Sud XI, Université de

327

Constraining Oceanic dust deposition using surface 1 ocean dissolved Al 2  

E-Print Network [OSTI]

Constraining Oceanic dust deposition using surface 1 ocean dissolved Al 2 Qin Han, J. Keith Moore, Charles Zender, Chris Measures, David Hydes 3 Abstract 4 We use measurements of ocean surface dissolved Al and Deposition 6 (DEAD) model, to constrain dust deposition to the oceans. Our Al database contains 7 all

Zender, Charles

328

Pacific Ocean Contribution to the Asymmetry in Eastern Indian Ocean Variability CAROLINE C. UMMENHOFER*  

E-Print Network [OSTI]

Pacific Ocean Contribution to the Asymmetry in Eastern Indian Ocean Variability CAROLINE C is restricted to the Indian or Pacific Ocean only, support the interpretation of forcing mechanisms for large Indian Ocean atmospheric forcing versus remote influences from Pacific wind forcing: low events develop

Ummenhofer, Caroline C.

329

National Oceanic and Atmospheric Administration's (NOAA) Oceans and Human Health Initiative  

E-Print Network [OSTI]

. We receive many benefits from the oceans from seafood, recreation and transportation industriesNational Oceanic and Atmospheric Administration's (NOAA) Oceans and Human Health Initiative (OHHI) is taking a new look at how the health of our ocean impacts our own health and well- being, and in turn how

330

Oceans and ClimateOceans and Climate PeterPeter RhinesRhines 11  

E-Print Network [OSTI]

say, the ocean is a great thermometer/thermometer/halometerhalometer Levitus, Antonov, Boyer+ Stephens

331

Coupling Mineral Carbonation and Ocean Liming  

Science Journals Connector (OSTI)

systems suggests that, unless air capture significantly outperforms these systems, it is likely to require more than 400 kJ of work per mol of CO2, requiring it to be powered by CO2-neutral power sources in order to be CO2 neg. ... by the oceans at an increased rate if ocean alky. ... Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chem. of the world's oceans with consequences for marine biota. ...

P. Renforth; T. Kruger

2013-01-23T23:59:59.000Z

332

Forcing of the Indian Ocean Dipole on the Interannual Variations of the Tropical Pacific Ocean: Roles of the Indonesian Throughflow  

Science Journals Connector (OSTI)

Controlled numerical experiments using ocean-only and ocean–atmosphere coupled general circulation models show that interannual sea level depression in the eastern Indian Ocean during the Indian Ocean dipole (IOD) events forces enhanced Indonesian ...

Dongliang Yuan; Jing Wang; Tengfei Xu; Peng Xu; Zhou Hui; Xia Zhao; Yihua Luan; Weipeng Zheng; Yongqiang Yu

2011-07-01T23:59:59.000Z

333

Ocean viscosity and climate M. Jochum,1  

E-Print Network [OSTI]

Ocean viscosity and climate M. Jochum,1 G. Danabasoglu,1 M. Holland,1 Y.-O. Kwon,1 and W. G. Large1] The impacts of parameterized lateral ocean viscosity on climate are explored using three 120-year integrations of a fully coupled climate model. Reducing viscosity leads to a generally improved ocean circulation

Jochum, Markus

334

ACR 891 (?) Ocean Policy: Current Issues seminar  

E-Print Network [OSTI]

ACR 891 (?) Ocean Policy: Current Issues seminar Fall, 2013 (2 cr, + 1 cr optional) Professor of a common pool resource than the world's oceans it can only be the atmosphere. The latter is currently neglected. This seminar is intended to introduce students to some of the current issues in ocean policy

335

Introducing Research College of Oceanic & Atmospheric Sciences  

E-Print Network [OSTI]

.coas.oregonstate.edu WECOMA WECOMA Coll ege of Oceanic & Atmospheric Scie nces OREGON STATE UNIVERSITY in the O cean currents, to the south in summer and generally to the north in winter, create ocean currents. The strong summertime and the topography of the ocean floor influence the east-west cross-shelf currents. Understanding and being able

Pierce, Stephen

336

Ocean Surface Currents From Geostationary Satellite SST  

E-Print Network [OSTI]

Ocean Surface Currents From Geostationary Satellite SST -We are implementing and evaluating a feature tracking approach to estimate ocean surface currents. - This approach allows us to estimate://cioss.coas.oregonstate.edu/ Ocean surface currents (vectors) derived from SST (background) modeled fields along the west coast of U

Kurapov, Alexander

337

Ocean indicators Current knowledge and future directions  

E-Print Network [OSTI]

Ocean indicators Current knowledge and future directions Brian Burke, NOAA Fisheries Brian.Burke@noaa.gov #12;· Review of ocean indicator work · Forecasting · Indicator gaps and the importance of mechanistic understanding · Plugging in to management #12;Haeseker et al. 2012 Ocean survival is low and variable #12;-10 -5

338

Aluminium in an ocean general circulation model  

E-Print Network [OSTI]

;Forcing: currents Figure: Velocity (m/s) at ocean surface, average of an OPA climatology Marco van Hulten: Aluminium in an ocean general circulation model 5 #12;Forcing: currents Figure: Atlantic OverturningAluminium in an ocean general circulation model Marco van Hulten November 15, 2011 This research

Haak, Hein

339

Introducing Research College of Oceanic & Atmospheric Sciences  

E-Print Network [OSTI]

WECOMA Coll ege of Oceanic & Atmospheric Scie nces OREGON STATE UNIVERSITY in the O cean currents introduced by man (e.g., pollutants). Knowledge of upper-ocean currents is important for navigation and for search and rescue. The ocean currents off Oregon vary seasonally and can also vary from year to year

Barth, Jack

340

Including Ocean Model Uncertainties in Climate Predictions  

E-Print Network [OSTI]

Including Ocean Model Uncertainties in Climate Predictions Chris Brierley, Alan Thorpe, Mat Collins's to perform the integrations Currently uses a `slab' ocean #12;An Ocean Model Required to accurately model transient behaviour Will have its own uncertainties Requires even more computing power Create new models

Jones, Peter JS

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Gravimetric geoid in the Northwest Pacific Ocean  

Science Journals Connector (OSTI)

......Gravimetric geoid in the Northwest Pacific Ocean A. B. Watts A. R. Leeds...gravimetric geoid of the Northwest Pacific Ocean. The 1 1 averages are based on...observations of gravity in the northwest Pacific Ocean, Tr. Intern. Okeanol., AN......

A. B. Watts; A. R. Leeds

1977-08-01T23:59:59.000Z

342

Lepidium latifolium reproductive potential and seed dispersal along salinity and moisture gradients  

E-Print Network [OSTI]

Preserve where the salinity gradient was narrow. Conversely,production along the salinity gradient between the freshdispersal along salinity and moisture gradients Samuel P.

Leininger, Samuel P.; Foin, Theodore C.

2009-01-01T23:59:59.000Z

343

Anthropogenic modification of the oceans  

Science Journals Connector (OSTI)

...calcification in the coralline alga Hydrolithon decreased following...concentration. Epiphytic coralline algae are much less abundant in low-pH...that, like corals, coralline algae will be highly susceptible to...currently very little fossil fuel CO2 in the deep ocean. However...

2011-01-01T23:59:59.000Z

344

ScienceMatters Arctic Ocean  

E-Print Network [OSTI]

into the ocean. The growth of marine algae is highest at the ice edge during the brief summer period when the ice of the marine food web, providing the main source of nourishment for fish and marine mammals. Algae also remove at molecular-level manufacturing as attempts to assemble LEGO pieces while wearing boxing gloves

Pedersen, Tom

345

Tabular icebergs in ocean waves  

Science Journals Connector (OSTI)

... in ocean waves. Two field seasons have been carried out by SPRI in cooperation with Norsk Polarinstitutt, and Foldvik et a/.11 have reported some measurements which took place during ... officers and the crew of the ship for their patience and help. We thank the Norsk Polarinstitutt (NP) and the Radio Echo Group at SPRI for loan of equipment, ...

Monica Kristensen; Vernon A. Squire; Stuart C. Moore

1982-06-24T23:59:59.000Z

346

PACIFIC OCEAN SOUTH BAY HARBOR  

E-Print Network [OSTI]

PACIFIC OCEAN LONG BEACH SOUTH BAY HARBOR GATEWAY NORWALK PASADENA EAST LA DOWNTOWN LOS ANGELES W illow P Pacific CoastHw y Anaheim 5th St 1stSt P©$ P©$ Transit Mall P©$ Pacific Long Beach P Lakew

Weinreb, Sander

347

February 2002 OCEAN DRILLING PROGRAM  

E-Print Network [OSTI]

February 2002 OCEAN DRILLING PROGRAM LEG 204 SCIENTIFIC PROSPECTUS DRILLING GAS HYDRATES ON HYDRATE 1000 Discovery Drive College Station TX 77845-9547 USA -------------------------------- Dr. Carl Drive College Station TX 77845-9547 USA #12;PUBLISHER'S NOTES Material in this publication may be copied

348

The effect of density gradient on the growth rate of relativistic Weibel instability  

SciTech Connect (OSTI)

In this paper, the effect of density gradient on the Weibel instability growth rate is investigated. The density perturbations in the near corona fuel, where temperature anisotropy, ?, is larger than the critical temperature anisotropy, ?{sub c}, (??>??{sub c}), enhances the growth rate of Weibel instability due to the sidebands coupled with the electron oscillatory velocity. But for ??thermal spread of the energetic electrons reduces the growth rate. Also, the growth rate can be reduced if the relativistic parameter (Lorentz factor) is sufficiently large, ??>?2. The analysis shows that relativistic effects and density gradient tend to stabilize the Weibel instability. The growth rate can be reduced by 88% by reducing ? by a factor of 100 and increasing relativistic parameter by a factor of 3.

Mahdavi, M., E-mail: m.mahdavi@umz.ac.ir [Physics Department, University of Mazandaran, P.O. Box 47415-416, Babolsar (Iran, Islamic Republic of); Khodadadi Azadboni, F., E-mail: f.khodadadi@stu.umz.ac.ir [Physics Department, University of Mazandaran, P.O. Box 47415-416, Babolsar (Iran, Islamic Republic of); Young Researchers Club, Sari Branch, Islamic Azad University, P.O. Box 48161-194, Sari (Iran, Islamic Republic of)

2014-02-15T23:59:59.000Z

349

ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Semi-Volatile Thermal desorption Aerosol Gas chromatograph (SVTAG) Semi-Volatile Thermal desorption Aerosol Gas chromatograph (SVTAG) Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Observations and Modeling of the Green Ocean Amazon: Semi-Volatile Thermal desorption Aerosol Gas chromatograph (SVTAG) 2014.02.01 - 2014.10.15 Lead Scientist : Allen Goldstein Description In areas where biogenic emissions are oxidized in the presence of anthropogenic pollutants such as SO2, NOx and black carbon, it has become increasingly apparent that secondary organic aerosol (SOA) formation from biogenic volatile organic compounds (VOCs) is substantially enhanced. Research is urgently needed to elucidate fundamental processes of natural

350

An experimental investigaion of seawater/basalt interactions: the role of water/rock ratios and temperature gradients  

E-Print Network [OSTI]

of the quench pH data as a function of temperature in temperature-gradient experiments 38 40 LIST OF PLATES Plate Page Ia Ib I la IIb IIIa IIIb IVa Ivb Va Vb VIa Large euhedral anhydrite crystals surrounded by honeycomb-shaped smectite. Run... circulation. Metabasalts ranging from zeolite to amphibolite facies, with greenstones dominating, have been dredged from the ocean floor (Aumento et al. 1971; Miyashi ro et al. 1971; Melson and van Andel, 1966; Shi do et al. , 1974; Bonatti et al. ; 1975...

Archer, Paul Lawrence

1978-01-01T23:59:59.000Z

351

Brine clarity maintenance in salinity-gradient solar ponds  

Science Journals Connector (OSTI)

Brine transparency is an important part of the maintenance of a salinity-gradient solar pond as it affects the amount of solar radiation reaching the storage zone and hence has an influence on the thermal performance. There is a wide range of factors that can hinder the transmission of light in a solar pond. Algal and microbial growths are the most common problems encountered in working solar ponds and control of their densities is essential to maintain transparency. Two different chemical treatment methods for algae growth prevention are described in this paper: chlorine and a novel chemical product – copper ethylamine complex. The latter method has never been implemented previously in a working pond. This paper discusses the theory of the algae control methods used and presents the experimental results of the chemical treatments. The results showed that Cupricide is more effective than chlorine and is therefore the recommended chemical for algae control in solar ponds; it improves the water transparency especially in the upper convective zone and lower convective zone with all measurement values less than 1 NTU. Chlorine was found to be more corrosive than Cupricide due to the acidic effect it has on the pH. The preliminary cost analysis showed that granular chlorine is the cheapest chemical. A more detailed financial analysis is nevertheless required to refine these costs.

Neus Gasulla; Yusli Yaakob; Jimmy Leblanc; Aliakbar Akbarzadeh; Jose Luis Cortina

2011-01-01T23:59:59.000Z

352

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"ings of Aquifer Thermal Energy Storage Workshop, Lawrence

Tsang, C.-F.

2011-01-01T23:59:59.000Z

353

Ocean noise in the tropical and subtropical Pacific Ocean  

Science Journals Connector (OSTI)

Ocean ambient noise is well studied in the North Pacific and North Atlantic but is poorly described for most of the worlds' oceans. Calibrated passive acoustic recordings were collected during 2009–2010 at seven locations in the central and western tropical and subtropical Pacific. Monthly and hourly mean power spectra (15–1000?Hz) were calculated in addition to their skewness kurtosis and percentile distributions. Overall ambient noise at these seven sites was 10–20?dB lower than reported recently for most other locations in the North Pacific. At frequencies 200?Hz with higher levels recorded in the winter than in the summer. Several species of baleen whales humpback (Megaptera novaeangliae) blue (Balaenoptera musculus) and fin (B. physalus) whales also contributed seasonally to ambient noise in characteristic frequency bands.

Ana Širovi?; Sean M. Wiggins; Erin M. Oleson

2013-01-01T23:59:59.000Z

354

Solar thermal power generation: a bibliography with abstracts. Quarterly update, July-September 1979  

SciTech Connect (OSTI)

This annotated bibliography covers the following subjects: energy overviews, solar overviews, energy conservation, economics and law, solar thermal power, thermionic and thermoelectric, ocean thermal energy conversion, wind power, biomass and photochemical energy, and large scale photovoltaics. An author index and a keyword index are included. (MHR)

Not Available

1980-02-01T23:59:59.000Z

355

Solar thermal power generation: a bibliography with abstracts. Quarterly update, April-June 1980  

SciTech Connect (OSTI)

This annotated bibliography covers the following subjects: energy overviews; solar overviews; energy conservation; environment, law, and policy; total energy systems; solar thermal power and energy storage; thermoelectric, thermionic, and thermolysis; Ocean Thermal Energy Conversion; wind energy; biomass; bioconversion, and photochemical; satellite power systems; and photovoltaic applications. (MHR)

Sparkman, T.; Bozman, W.R. (eds.)

1980-08-01T23:59:59.000Z

356

Solar thermal power generation: a bibliography with abstracts. Quarterly update, January-March 1980  

SciTech Connect (OSTI)

This annotated bibliography contains the following: energy overviews, solar overviews, energy conservation, economics and law, total energy systems, solar thermal power, thermionic and thermoelectric, ocean thermal energy conversion, wind power, biomass and photochemical energy, satellite power stations, and large-scale photovoltaics. (MHR)

Not Available

1980-06-01T23:59:59.000Z

357

Thermal history of Bakken shale in Williston basin  

SciTech Connect (OSTI)

Stratigraphic and thermal conductivity data were combined to analyze the thermostratigraphy of the Williston basin. The present thermostratigraphy is characterized by geothermal gradients of the order of 60 mK/m in the Cenozoic and Mesozoic units, and 30 mK/m in the Paleozoic units. The differences in geothermal gradients are due to differences in thermal conductivities between the shale-dominated Mesozoic and Cenozoic units and the carbonate-dominated Paleozoic units. Subsidence and compaction rates were calculated for the basin and were used to determine models for time vs. depth and time vs. thermal conductivity relationships for the basin. The time/depth and time/conductivity relationships include factors accounting for thermal conductivity changes due to compaction, cementation, and temperature. The thermal history of the Bakken shale, a primary oil source rock in the Williston basin, was determined using four different models, and values for Lopatin's time-temperature index (TTI) were calculated for each model. The first model uses a geothermal gradient calculated from bottom-hole temperature data, the second uses present-day thermostratigraphy, the third uses the thermostratigraphic relationship determined in this analysis, and the fourth modifies the third by including assumed variations in continental heat flow. The thermal histories and the calculated TTI values differ markedly among the models with TTI values differing by a factor of about two between some models.

Gosnold, W.D. Jr.; Lefever, R.D.; Crashell, J.J. (Univ. of North Dakota, Grand Forks (USA))

1989-12-01T23:59:59.000Z

358

Chapter 2 - The History of Measuring Ocean Currents  

Science Journals Connector (OSTI)

Abstract This chapter begins with a brief mention of the contributions made by the ancient mariners in the “discovery” of oceanic currents. Subsequent efforts made by several investigators in this direction, toward development of various devices for measurements of oceanic currents, are then addressed. These include technologies for measurement of surface currents, subsurface and abyssal currents, seafloor boundary layer currents, and vertical profiling of horizontal currents. Surface current measurement technologies include the application of drifting surface bodies; imaging of surface water motion trajectories and patterns with the support of aerial photography, radiometry, and active microwave radar systems; and vector mapping based on current-driven sea-surface wave transport. This is followed by discussion of technologies developed for subsurface and abyssal current measurements. These include spatially integrated measurements based on earth’s magnetism and oceanic sound speed, Lagrangian measurements based on motion of drifting subsurface floats, and Eulerian measurements with the support of a multitude of devices such as suspended drag, propeller revolution registration by mechanical counters, unidirectional impeller current meters, Savonius rotor current meters, ultrasonic acoustic methods, thermal sensors for measurements of turbulent motions, laser Doppler sensors, and acoustic Doppler current meters. This chapter further addresses an important topic of seafloor boundary layer current measurements using mechanical devices and nonmechanical devices such as BASS and MAVS. The chapter concludes with a discussion of technologies developed for vertical profiling of horizontal currents.

Antony Joseph

2014-01-01T23:59:59.000Z

359

Preparation and characterization of gradient polymer films  

SciTech Connect (OSTI)

Gradient polymers are multicomponent polymers whose chemical constitution varies with depth in the sample. Although these polymers may possess unique mechanical, optical, and barrier properties they remain relatively unexplored. This work is a study of the preparation of gradient polymers by sequential exposure of films to a diffusing monomer followed by electron beam irradiation. Initial experiments involved immersion of poly(vinyl chloride) (PVC) films in styrene or n-butyl methacrylate (BMA) for various time periods followed by irradiation with 1 or 10 megarads of accelerated electrons. A significant amount of poly(n-butyl methacrylate) (PBMA) formed in PVC/BMA systems, but little polystyrene could be found in the PVC/styrene films. A second set of experiments involved immersion of PVC and polyethylene (PE) films in BMA for 20, 40, 60, and 720 minutes followed by irradiation with 10 megarads of electrons. These films were then characterized using optical microscopy, quantitative transmission Fourier transform infrared spectroscopy (FTIR), and a depth profiling procedure based on quantitative attenuated total reflection (ATR) FTIR. It was concluded that the mechanism of PBMA formation in the polyethylene films was a result of events immediately following irradiation. Atmospheric oxygen diffusing into irradiated films trapped free radicals at the film surfaces. This was followed by storage in an evacuated desiccator where unintentional exposure to BMA vapor took place. This BMA reacted with free radicals that remained within the film cores, polymerizing to PBMA.

Smith, S.C.

1987-01-01T23:59:59.000Z

360

Analysis of Bacterial Communities in Seagrass Bed Sediments by Double-Gradient Denaturing Gradient Gel Electrophoresis  

E-Print Network [OSTI]

Microbial Ecology Analysis of Bacterial Communities in Seagrass Bed Sediments by Double, including the presence or absence of vegetation, depth into sediment, and season. Double- gradient of these similarity coefficients were used to group banding patterns by depth into sediment, presence or absence

Sherman, Tim

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Functionally gradient material for membrane reactors to convert methane gas into value-added products  

DOE Patents [OSTI]

A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials. 7 figs.

Balachandran, U.; Dusek, J.T.; Kleefisch, M.S.; Kobylinski, T.P.

1996-11-12T23:59:59.000Z

362

Functionally gradient material for membrane reactors to convert methane gas into value-added products  

DOE Patents [OSTI]

A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials.

Balachandran, Uthamalingam (Hinsdale, IL); Dusek, Joseph T. (Lombard, IL); Kleefisch, Mark S. (Napersville, IL); Kobylinski, Thadeus P. (Lisle, IL)

1996-01-01T23:59:59.000Z

363

Electron Thermal Transport in Tokamak: ETG or TEM Turbulences?  

E-Print Network [OSTI]

Electron Thermal Transport in Tokamak: ETG or TEM Turbulences? Z. Lin, L. Chen, Y. Nishimura, H. Qu studies of electron transport in tokamak including: (1) electron temperature gradient turbulence; (2) trapped electron mode turbulence; and (3) a new finite element solver for global electromagnetic

Zonca, Fulvio

364

Introduction When exposed to high thermal loads, many endotherms  

E-Print Network [OSTI]

ungulates, is heterothermy, the storage of body heat during the day, under positive thermal load the fact that the gradient between Tb and Ta was larger and solar radiation was lower in winter-1429 Published by The Company of Biologists 2006 doi:10.1242/jeb.02151 Heterothermy of free-living Arabian sand

Williams, Jos. B.

365

Evaluation of thermal comfort using combined CFD and experimentation study in a test room equipped with a cooling ceiling  

E-Print Network [OSTI]

temperature gradient is less than 1°C/m, which corresponds to the standards recommendations. A comparison a good indoor thermal comfort. Heating, ventilating and air conditioning (HVAC) systems, which consume

Paris-Sud XI, Université de

366

Gas flow driven by thermal creep in dusty plasma T. M. Flanagan and J. Goree  

E-Print Network [OSTI]

Gas flow driven by thermal creep in dusty plasma T. M. Flanagan and J. Goree Department of Physics 2009 Thermal creep flow TCF is a flow of gas driven by a temperature gradient along a solid boundary to the bulk gas, causing the bulk gas to flow, thereby stirring the suspension of dust particles. This result

Goree, John

367

Measuring Ocean Acidification: New Technology for a New Era of Ocean Chemistry  

Science Journals Connector (OSTI)

CO2 system changes in the upper ocean (wind-mixed layer) at stations in the Pacific (HOT) and Atlantic (BATS) oceans: the carbonate:bicarbonate concentration ratio and pH. ... Ocean alkalinity buffers the effects of oceanic CO2 uptake, but slowing and eventually reversing the trend of increasing ocean acidity will require increased continental weathering and dissolution of ocean carbonate sediments. ... (80) Each platform imposes different constraints on instrument design and performance in terms of measurement frequency, accuracy, and precision, as well as sensor size, power requirements, and endurance. ...

Robert H. Byrne

2014-04-07T23:59:59.000Z

368

Impact of the Southern ocean winds on sea-ice - ocean interaction and its associated global ocean circulation in a warming world  

E-Print Network [OSTI]

This dissertation discusses a linkage between the Southern Ocean (SO) winds and the global ocean circulation in the framework of a coarse-resolution global ocean general circulation model coupled to a sea-ice model. In addition to reexamination...

Cheon, Woo Geunn

2009-05-15T23:59:59.000Z

369

Photo of the Week: The Alternating Gradient Synchrotron | Department of  

Broader source: Energy.gov (indexed) [DOE]

The Alternating Gradient Synchrotron The Alternating Gradient Synchrotron Photo of the Week: The Alternating Gradient Synchrotron March 11, 2013 - 6:00pm Addthis Since 1960, the Alternating Gradient Synchrotron (AGS) has been one of the world's premiere particle accelerators, well known for the three Nobel Prizes won as a result of research performed there. The AGS name is derived from the concept of alternating gradient focusing, in which the field gradients of the accelerator's 240 magnets are successively alternated inward and outward, permitting particles to be propelled and focused in both the horizontal and vertical plane at the same time. In this 1958 photo, giant magnets await installation into the AGS accelerator ring tunnel at Brookhaven National Laboratory. | Photo courtesy of Brookhaven National Laboratory.

370

Photo of the Week: The Alternating Gradient Synchrotron | Department of  

Broader source: Energy.gov (indexed) [DOE]

The Alternating Gradient Synchrotron The Alternating Gradient Synchrotron Photo of the Week: The Alternating Gradient Synchrotron March 11, 2013 - 6:00pm Addthis Since 1960, the Alternating Gradient Synchrotron (AGS) has been one of the world's premiere particle accelerators, well known for the three Nobel Prizes won as a result of research performed there. The AGS name is derived from the concept of alternating gradient focusing, in which the field gradients of the accelerator's 240 magnets are successively alternated inward and outward, permitting particles to be propelled and focused in both the horizontal and vertical plane at the same time. In this 1958 photo, giant magnets await installation into the AGS accelerator ring tunnel at Brookhaven National Laboratory. | Photo courtesy of Brookhaven National Laboratory.

371

High gradient lens for charged particle beam  

DOE Patents [OSTI]

Methods and devices enable shaping of a charged particle beam. A dynamically adjustable electric lens includes a series of alternating a series of alternating layers of insulators and conductors with a hollow center. The series of alternating layers when stacked together form a high gradient insulator (HGI) tube to allow propagation of the charged particle beam through the hollow center of the HGI tube. A plurality of transmission lines are connected to a plurality of sections of the HGI tube, and one or more voltage sources are provided to supply an adjustable voltage value to each transmission line of the plurality of transmission lines. By changing the voltage values supplied to each section of the HGI tube, any desired electric field can be established across the HGI tube. This way various functionalities including focusing, defocusing, acceleration, deceleration, intensity modulation and others can be effectuated on a time varying basis.

Chen, Yu-Jiuan

2014-04-29T23:59:59.000Z

372

High-gradient compact linear accelerator  

DOE Patents [OSTI]

A high-gradient linear accelerator comprises a solid-state stack in a vacuum of five sets of disc-shaped Blumlein modules each having a center hole through which particles are sequentially accelerated. Each Blumlein module is a sandwich of two outer conductive plates that bracket an inner conductive plate positioned between two dielectric plates with different thicknesses and dielectric constants. A third dielectric core in the shape of a hollow cylinder forms a casing down the series of center holes, and it has a dielectric constant different that the two dielectric plates that sandwich the inner conductive plate. In operation, all the inner conductive plates are charged to the same DC potential relative to the outer conductive plates. Next, all the inner conductive plates are simultaneously shorted to the outer conductive plates at the outer diameters. The signal short will propagate to the inner diameters at two different rates in each Blumlein module. A faster wave propagates quicker to the third dielectric core across the dielectric plates with the closer spacing and lower dielectric constant. When the faster wave reaches the inner extents of the outer and inner conductive plates, it reflects back outward and reverses the field in that segment of the dielectric core. All the field segments in the dielectric core are then in unipolar agreement until the slower wave finally propagates to the third dielectric core across the dielectric plates with the wider spacing and higher dielectric constant. During such unipolar agreement, particles in the core are accelerated with gradients that exceed twenty megavolts per meter.

Carder, Bruce M. (205 Rogue River Hwy., Gold Hill, OR 97525)

1998-01-01T23:59:59.000Z

373

High-gradient compact linear accelerator  

DOE Patents [OSTI]

A high-gradient linear accelerator comprises a solid-state stack in a vacuum of five sets of disc-shaped Blumlein modules each having a center hole through which particles are sequentially accelerated. Each Blumlein module is a sandwich of two outer conductive plates that bracket an inner conductive plate positioned between two dielectric plates with different thicknesses and dielectric constants. A third dielectric core in the shape of a hollow cylinder forms a casing down the series of center holes, and it has a dielectric constant different that the two dielectric plates that sandwich the inner conductive plate. In operation, all the inner conductive plates are charged to the same DC potential relative to the outer conductive plates. Next, all the inner conductive plates are simultaneously shorted to the outer conductive plates at the outer diameters. The signal short will propagate to the inner diameters at two different rates in each Blumlein module. A faster wave propagates quicker to the third dielectric core across the dielectric plates with the closer spacing and lower dielectric constant. When the faster wave reaches the inner extents of the outer and inner conductive plates, it reflects back outward and reverses the field in that segment of the dielectric core. All the field segments in the dielectric core are then in unipolar agreement until the slower wave finally propagates to the third dielectric core across the dielectric plates with the wider spacing and higher dielectric constant. During such unipolar agreement, particles in the core are accelerated with gradients that exceed twenty megavolts per meter. 10 figs.

Carder, B.M.

1998-05-26T23:59:59.000Z

374

On the World-wide Circulation of the Deeper Waters of the World Ocean  

E-Print Network [OSTI]

circulation of the Pacific Ocean: Flow patterns, tracers,in preparing the figures. Fig. 1 Pacific Ocean winds Fig.2 Pacific Ocean circulation Fig. 4 Pacific Ocean potential

Reid, Joseph L

2009-01-01T23:59:59.000Z

375

Bernstein instability driven by thermal ring distribution  

SciTech Connect (OSTI)

The classic Bernstein waves may be intimately related to banded emissions detected in laboratory plasmas, terrestrial, and other planetary magnetospheres. However, the customary discussion of the Bernstein wave is based upon isotropic thermal velocity distribution function. In order to understand how such waves can be excited, one needs an emission mechanism, i.e., an instability. In non-relativistic collision-less plasmas, the only known Bernstein wave instability is that associated with a cold perpendicular velocity ring distribution function. However, cold ring distribution is highly idealized. The present Brief Communication generalizes the cold ring distribution model to include thermal spread, so that the Bernstein-ring instability is described by a more realistic electron distribution function, with which the stabilization by thermal spread associated with the ring distribution is demonstrated. The present findings imply that the excitation of Bernstein waves requires a sufficiently high perpendicular velocity gradient associated with the electron distribution function.

Yoon, Peter H., E-mail: yoonp@umd.edu [Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States); School of Space Research, Kyung Hee University, Yongin-Si, Gyeonggi-Do 446-701 (Korea, Republic of); Hadi, Fazal; Qamar, Anisa [Institute of Physics and Electronics, University of Peshawar, Peshawar 25000 (Pakistan)

2014-07-15T23:59:59.000Z

376

Temperature, heat flow maps and temperature gradient holes |...  

Open Energy Info (EERE)

Temperature, heat flow maps and temperature gradient holes Author T. G. Zacharakis Organization Colorado Geological Survey in Cooperation with the U.S. Department of Energy...

377

Ch. VII, Temperature, heat flow maps and temperature gradient...  

Open Energy Info (EERE)

Ch. VII, Temperature, heat flow maps and temperature gradient holes Author T. G. Zacharakis Editor T. G. Zacharakis Published Colorado Geological Survey in Cooperation with the...

378

A Sparsity Preserving Stochastic Gradient Method for Composite ...  

E-Print Network [OSTI]

Apr 23, 2011 ... Abstract: We propose new stochastic gradient algorithms for solving convex composite optimization problems. In each iteration, our algorithms ...

Qihang Lin

2011-04-23T23:59:59.000Z

379

A Sparsity Preserving Stochastic Gradient Method for Composite ...  

E-Print Network [OSTI]

Apr 23, 2011 ... We propose new stochastic gradient algorithms for solving convex composite optimization problems. In each iteration, our algorithms utilize a ...

2011-04-23T23:59:59.000Z

380

Policy Gradient Methods: Variance Reduction and Stochastic Convergence .  

E-Print Network [OSTI]

??In a reinforcement learning task an agent must learn a policy for performing actions so as to perform well in a given environment. Policy gradient… (more)

Greensmith, Evan

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Evapotranspiration along an elevation gradient in California's Sierra Nevada  

E-Print Network [OSTI]

Soil-moisture use by mixed conifer forest in a summer- dryforest, Sierra mixed conifer forest, and Subalpine forest)Climate Gradient Sierran Mixed Conifer Forest Sierra Climate

Goulden, M. L.; Anderson, R. G.; Bales, R. C.; Kelly, A. E.; Meadows, M.; Winston, G. C.

2012-01-01T23:59:59.000Z

382

An inexact accelerated proximal gradient method for large scale ...  

E-Print Network [OSTI]

The accelerated proximal gradient (APG) method, first proposed by Nesterov, and later refined by Beck and Teboulle, and studied in a unifying manner by Tseng.

2011-09-09T23:59:59.000Z

383

An accelerated proximal gradient algorithm for nuclear norm ...  

E-Print Network [OSTI]

Mar 27, 2009 ... An accelerated proximal gradient algorithm for nuclear norm regularized least squares problems. Kim-Chuan Toh (mattohkc ***at*** nus.edu.sg)

Kim-Chuan Toh

2009-03-27T23:59:59.000Z

384

Analysis of natural gradient descent for multilayer neural networks  

Science Journals Connector (OSTI)

Natural gradient descent is a principled method for adapting the parameters of a statistical model on-line using an underlying Riemannian parameter space to redefine the direction of steepest descent. The algorithm is examined via methods of statistical physics that accurately characterize both transient and asymptotic behavior. A solution of the learning dynamics is obtained for the case of multilayer neural network training in the limit of large input dimension. We find that natural gradient learning leads to optimal asymptotic performance and outperforms gradient descent in the transient, significantly shortening or even removing plateaus in the transient generalization performance that typically hamper gradient descent training.

Magnus Rattray and David Saad

1999-04-01T23:59:59.000Z

385

Indian Ocean surface circulations and their connection to Indian Ocean dipole, identified from Ocean Surface Currents Analysis Real Time (OSCAR) data .  

E-Print Network [OSTI]

??Ocean surface circulation is an essential component of the world climate system. In this study, the Ocean Surface Currents Analysis - Real Time (OSCAR) data,… (more)

Rana, Haris Sarwar

2008-01-01T23:59:59.000Z

386

Upper-ocean variability in Drake Passage and the Weddell Sea : Measuring the oceanic response to air-sea and ice-ocean interactions  

E-Print Network [OSTI]

blocks melting into a salinity gradient. J. Fluid Mech. ,with depth, but a salinity gradient near the surface is notW) (Fig. 2.4d-f), the salinity gradient is much weaker, and

Stephenson, Gordon Ronald

2012-01-01T23:59:59.000Z

387

Ocean - Regional Planning Efforts | Data.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Regional Planning Efforts Regional Planning Efforts Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov » Communities » Ocean Regional Planning Efforts Marine planning is a science-based process that provides transparent information about ocean use and guarantees the public and stakeholders a voice early on in decisions affecting the uses of the marine environment. It is an inclusive, bottom-up approach that gives the Federal Government, States, and Tribes, with input from local communities, stakeholders, and the public, the ability to make informed decisions on how best to optimize the use of and protect the ocean, coasts, and Great Lakes. Under the National Ocean Policy, the United States is subdivided into nine regional planning areas. Within each region, Federal, State, and Tribal

388

Climate, Ocean and Sea Ice Modeling (COSIM)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Earth, Space Sciences » Earth, Space Sciences » Climate, Ocean and Sea Ice Modeling (COSIM) Climate, Ocean and Sea Ice Modeling (COSIM) The COSIM project develops advanced ocean and ice models for evaluating the role of ocean and ice in high-latitude climate change and projecting the impacts of high-latitude change on regions throughout the globe. Get Expertise Phil Jones COSIM Email Matthew Hecht COSIM Email Elizabeth Hunke COSIM Email Mat Maltrud COSIM Email Bill Lipscomb COSIM Email Scott Elliott COSIM Email Todd Ringler COSIM Email We are also developing a set of next-generation ocean and ice models with variable resolution horizontal grids to focus resolution on regions of interest or regions where specific processes (like eddies) need to be resolved. Summary The COSIM project develops advanced ocean and ice models for evaluating the

389

Coronal Heating Driven by Magnetic-gradient Pumping Mechanism in Solar Plasmas  

E-Print Network [OSTI]

The solar coronal heating is a longstanding mystery in astrophysics. Considering that the solar magnetic field is spatially inhomogeneous with considerable magnetic gradient from solar surface to the corona, this work proposes a magnetic gradient pumping (MGP) mechanism and try to explain the formation of hot plasma upflows, such as the hot type II spicules and hot plasma ejections, etc. In MGP mechanism, the magnetic gradients drive the energetic particles to move upwards from the underlying solar atmosphere and form hot upflows. These upflow energetic particles deposit in corona and make it becoming very hot. Roughly estimations indicate that the solar corona can be heated to above 1 million degrees, and the upflow velocity is about 40 km/s in chromosphere and about 130 km/s in the corona. The solar magnetic flux tubes act as pumpers to extract energetic particles from the underlying thermal photosphere, convey them and deposit in the corona. The deposition of energetic particles will make the corona become...

Tan, Baolin

2014-01-01T23:59:59.000Z

390

Spatial Gradients in Particle Reinforced Polymers Characterized by X-Ray Attenuation and Laser Confocal Microscopy  

SciTech Connect (OSTI)

The goal of this work is to develop techniques for measuring gradients in particle concentration within filled polymers, such as encapsulant. A high concentration of filler particles is added to such materials to tailor physical properties such as thermal expansion coefficient. Sedimentation and flow-induced migration of particles can produce concentration gradients that are most severe near material boundaries. Therefore, techniques for measuring local particle concentration should be accurate near boundaries. Particle gradients in an alumina-filled epoxy resin are measured with a spatial resolution of 0.2 mm using an x-ray beam attenuation technique, but an artifact related to the finite diameter of the beam reduces accuracy near the specimen's edge. Local particle concentration near an edge can be measured more reliably using microscopy coupled with image analysis. This is illustrated by measuring concentration profiles of glass particles having 40 {micro}m median diameter using images acquired by a confocal laser fluorescence microscope. The mean of the measured profiles of volume fraction agrees to better than 3% with the expected value, and the shape of the profiles agrees qualitatively with simple theory for sedimentation of monodisperse particles. Extending this microscopy technique to smaller, micron-scale filler particles used in encapsulant for microelectronic devices is illustrated by measuring the local concentration of an epoxy resin containing 0.41 volume fraction of silica.

LAGASSE,ROBERT R.; THOMPSON,KYLE R.

2000-06-12T23:59:59.000Z

391

Evaluation of OSCAR ocean surface current product in the tropical Indian Ocean using in situ data  

Science Journals Connector (OSTI)

The OSCAR (ocean surface current analysis real-time), which is a ... , has been evaluated in the tropical Indian Ocean (TIO) in two different ways. First ... capture the variabilities of the well-known surface current

RAJESH SIKHAKOLLI; RASHMI SHARMA; SUJIT BASU; B S GOHIL…

2013-02-01T23:59:59.000Z

392

Short Communication Three ocean state indices implemented in  

E-Print Network [OSTI]

, and currents at various resolutions. We briefly present the OFS, then describe three currently available oceanShort Communication Three ocean state indices implemented in the Mercator-Ocean operational suite L., and Soulat, F. 2008. Three ocean state indices implemented in the Mercator-Ocean operational suite. ­ ICES

Ribes, Aurélien

393

Ocean Sci., 8, 227248, 2012 www.ocean-sci.net/8/227/2012/  

E-Print Network [OSTI]

. In the Arabian Sea, the surface oceanic currents form a cyclonic gyre in January, which weakens in March (KindleOcean Sci., 8, 227­248, 2012 www.ocean-sci.net/8/227/2012/ doi:10.5194/os-8-227-2012 © Author(s) 2012. CC Attribution 3.0 License. Ocean Science Mesoscale variability of water masses in the Arabian

Paris-Sud XI, Université de

394

Inherent optical properties of the ocean  

Science Journals Connector (OSTI)

Atlantic Ocean, the Gulf of Mexico, and Monterey Bay, and includes Gulf Stream, Loop Current, slope, shelf, and ... The solar-induced fluorescence of CDOM ...

1999-12-24T23:59:59.000Z

395

Ocean Currents Produced by Evaporation and Precipitation  

Science Journals Connector (OSTI)

1 September 1933 research-article Ocean Currents Produced by Evaporation and Precipitation G. R. Goldsbrough The Royal Society is collaborating with JSTOR to digitize, preserve...

1933-01-01T23:59:59.000Z

396

On Ocean Currents Produced by Winds  

Science Journals Connector (OSTI)

1 January 1935 research-article On Ocean Currents Produced by Winds G. R. Goldsbrough The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access...

1935-01-01T23:59:59.000Z

397

Intermediate Waters of the Pacific Ocean.  

Science Journals Connector (OSTI)

BOOK REVIEWS. 313. REID, J. L., JR. 1965. Intermediate. Waters of the Pacific Ocean. Johns Hopkins Oceano- graphic. Studies,. No. 2. Johns Hopkins. Press ...

1999-12-30T23:59:59.000Z

398

Hydropower and Ocean Energy Resources and Technologies  

Broader source: Energy.gov [DOE]

This page provides a brief overview of hydropower and ocean energy resources and technologies supplemented by specific information to apply these technologies within the Federal sector.

399

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Southern Ocean, circling the Earth between Antarctica and the southernmost regions of Africa, South America, and Australia, is notorious for its high-nutrient, low-chlorophyll...

400

Analysis of variations in ocean color  

Science Journals Connector (OSTI)

Aug 9, 1976 ... mote sensing values of the color of the ocean .... its spectral variations, we must first study ... tering can be expressed in terms of a power.

2000-01-05T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Note: Local thermal conductivities from boundary driven non-equilibrium molecular dynamics simulations  

SciTech Connect (OSTI)

We report non-equilibrium molecular dynamics simulations of heat transport in models of molecular fluids. We show that the “local” thermal conductivities obtained from non-equilibrium molecular dynamics simulations agree within numerical accuracy with equilibrium Green-Kubo computations. Our results support the local equilibrium hypothesis for transport properties. We show how to use the local dependence of the thermal gradients to quantify the thermal conductivity of molecular fluids for a wide range of thermodynamic states using a single simulation.

Bresme, F., E-mail: f.bresme@imperial.ac.uk [Department of Chemistry, Chemical Physics Section, Imperial College London, London SW7 2AZ (United Kingdom); Department of Chemistry, Norwegian University of Science and Technology, Trondheim (Norway); Armstrong, J., E-mail: j.armstrong@imperial.ac.uk [Department of Chemistry, Chemical Physics Section, Imperial College London, London SW7 2AZ (United Kingdom)

2014-01-07T23:59:59.000Z

402

Variability, interaction and change in the atmosphere–ocean–ecology system of the Western Indian Ocean  

Science Journals Connector (OSTI)

...all. In a symposium on the Indian Ocean over 30 years ago, David...sea level? Why do most modern Indian Ocean reefs only thinly veneer...survival over long time-scales) point to the importance of long-term...regeneration. In the Western Indian Ocean, studies are in place...

2005-01-01T23:59:59.000Z

403

Atmosphere–ocean dynamics in the Western Indian Ocean recorded in corals  

Science Journals Connector (OSTI)

...Atmosphere-ocean-ecology dynamics in the Western Indian Ocean organized by Tom Spencer...18 O (dashed line) and 11-point moving average (solid line...Parker et al. 1995) and 11-point moving average (solid line...to the wind- driven southern Indian Ocean gyre (Allan et al. 1995...

2005-01-01T23:59:59.000Z

404

Author's personal copy A novel ocean color index to detect oating algae in the global oceans  

E-Print Network [OSTI]

Author's personal copy A novel ocean color index to detect oating algae in the global oceans December 2008 Received in revised form 15 May 2009 Accepted 23 May 2009 Keywords: Floating Algae Index (FAI Remote sensing Ocean color Climate data record Various types of oating algae have been reported in open

Meyers, Steven D.

405

Persistent Ocean Monitoring with Underwater Gliders: Towards Accurate Reconstruction of Dynamic Ocean Processes  

E-Print Network [OSTI]

to ocean currents. The speed control algorithm then optimizes the speed along the planned path so waters of large magnitude ocean currents, and is length constrained. Secondly, we develop a velocityPersistent Ocean Monitoring with Underwater Gliders: Towards Accurate Reconstruction of Dynamic

Smith, Ryan N.

406

Summer Courses in Ocean Optics and Biogeochemistry: "Monitoring the Oceans with Coastal Observatories" and  

E-Print Network [OSTI]

Summer Courses in Ocean Optics and Biogeochemistry: "Monitoring the Oceans with Coastal integration of optical approaches into oceanographic research in general. OBJECTIVES These two courses created and optical oceanography and ocean color remote sensing to learn the fundamentals of optics in a coastal

Boss, Emmanuel S.

407

TELECONNECTIONS BETWEEN NORTHEASTERN PACIFIC OCEAN AND THE GULF OF MEXICO AND NORTHWESTERN ATLANTIC OCEAN  

E-Print Network [OSTI]

TELECONNECTIONS BETWEEN NORTHEASTERN PACIFIC OCEAN AND THE GULF OF MEXICO AND NORTHWESTERN ATLANTIC-scale interactions in the tropical Pacific Ocean, especially, processes associated with the EI Nino phenomena. He has of ocean temperatures. He suggests that an anomalously high heat supply in the equatorial Pacific

408

Ocean Sci., 3, 299310, 2007 www.ocean-sci.net/3/299/2007/  

E-Print Network [OSTI]

and industrial fisheries, are experiencing a constant increase, significantly affecting the marine ecosystemOcean Sci., 3, 299­310, 2007 www.ocean-sci.net/3/299/2007/ © Author(s) 2007. This work is licensed under a Creative Commons License. Ocean Science Observing the Mediterranean Sea from space: 21 years

Boyer, Edmond

409

Evaluation of liquid lift approach to dual gradient  

E-Print Network [OSTI]

the mudline to the rig floor so as to maintain the bottom hole pressure. Several methods have been developed to achieve the dual gradient drilling principle. For this research project, we paid more attention to the liquid lift, dual gradient drilling (riser...

Okafor, Ugochukwu Nnamdi

2009-05-15T23:59:59.000Z

410

Evaluation of liquid lift approach to dual gradient drilling  

E-Print Network [OSTI]

the mudline to the rig floor so as to maintain the bottom hole pressure. Several methods have been developed to achieve the dual gradient drilling principle. For this research project, we paid more attention to the liquid lift, dual gradient drilling (riser...

Okafor, Ugochukwu Nnamdi

2008-10-10T23:59:59.000Z

411

Were Archaean continental geothermal gradients much steeper than today?  

Science Journals Connector (OSTI)

... km depth) did not generally exceed 800 C. From this they deduce a surface geothermal gradient of less than 23 C km'1 compared with 17 C km'1 in ... P-T determinations on Archaean granulites (summarised in ref. 2) their calculation of the geothermal gradient does not comply with conductive properties and distribution of heat producing elements within the ...

S. A. DRURY

1978-08-17T23:59:59.000Z

412

Energy Conversion from Salinity Gradients by Forward Osmosis–Electrokinetics  

Science Journals Connector (OSTI)

Energy Conversion from Salinity Gradients by Forward Osmosis–Electrokinetics ... Through the use of a salinity gradient, a suction force is created to induce a hydrodynamic flow in the FO submodule based on the principle of FO. ... Kiviat, F. E.Energy Recovery from Saline Water by Means of Electrochemical Cells Science 1976, 194, 719– 720 ...

Yanmei Jiao; Chun Yang; Yuejun Kang

2014-03-12T23:59:59.000Z

413

Global ocean wind power sensitivity to surface layer stability  

E-Print Network [OSTI]

2009 Global ocean wind power sensitivity to surface layer1 May 2009. [ 1 ] Global ocean wind power has recently beenincreases mean global ocean wind power by +58% and À4%,

Capps, Scott B; Zender, Charles S

2009-01-01T23:59:59.000Z

414

Tidal triggering of earthquakes in the Northeast Pacific Ocean  

Science Journals Connector (OSTI)

......of earthquakes in the Northeast Pacific Ocean William S. D. Wilcock School...of earthquakes in the Northeast Pacific Ocean, a region of high-amplitude...interaction|forecasting|prediction|Pacific Ocean| Introduction For more than a......

William S. D. Wilcock

2009-11-01T23:59:59.000Z

415

Philadelphians protest ocean burning of waste  

Science Journals Connector (OSTI)

Philadelphians protest ocean burning of waste ... A raucous, hostile crowd of Philadelphia residents shouted down Environmental Protection Agency officials last week at a public hearing on the agency's tentative decision to issue a research permit for an ocean burn of chemical wastes. ...

1986-01-20T23:59:59.000Z

416

Dynamics of a Snowball Earth ocean  

Science Journals Connector (OSTI)

... a model that couples ice flow and ocean circulation, and is driven by a weak geothermal heat flux under a global ice cover about a kilometre thick. Compared with the ... studies accounted for the combined effects of thick ice cover and flow, and driving by geothermal heating, yet ref. 11 simulated an ocean under a 200-m-thick ice cover ...

Yosef Ashkenazy; Hezi Gildor; Martin Losch; Francis A. Macdonald; Daniel P. Schrag; Eli Tziperman

2013-03-06T23:59:59.000Z

417

Automated Sensor Networks to Advance Ocean Science  

E-Print Network [OSTI]

satellite telecom- munications. A regional cabled observa- tory will "wire" a single region in the north- eastern Pacific Ocean with a high-speed optical and power grid. The coastal com- ponent will expand ocean- observing network in the Mid-Atlantic Bight waters (MAB, spanning offshore regions from

418

Wavelet Spectrum Analysis and Ocean Wind Waves  

E-Print Network [OSTI]

Wavelet Spectrum Analysis and Ocean Wind Waves Paul C. Liu Abstract. Wavelet spectrum analysis is applied to a set of measured ocean wind waves data collected during the 1990 SWADE {Surface Wave Dynamics Experi- ment) program. The results reveal significantly new and previously unexplored Insights on wave

419

www.hboi.fau.edu Ocean Energy  

E-Print Network [OSTI]

to drive turbines #12;At present, the focus is to establish a small-scale ocean current test sitewww.hboi.fau.edu Ocean Energy Collaboration: A Charge for Engineers BULLETIN Summer 2012 Beginning by Executive Director Sue Skemp, they are helping to investigate and develop power extraction from particularly

Fernandez, Eduardo

420

Ocean and Sea Ice SAF Technical Note  

E-Print Network [OSTI]

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP/KNMI/TEC/RP/147 Validation of ASCAT 12.5-km winds The Ocean and Sea Ice Satellite Application Facility (OSI SAF) delivers an operational level 2 wind product produces a level 1 product with 12.5-km WVC spacing that has a resolution of approximately 25 km. Since

Stoffelen, Ad

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Ocean and Sea Ice SAF Technical Note  

E-Print Network [OSTI]

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP2/KNMI/TEC/RP/194 Quality Control of Ku. The OSCAT level 2a data are available in near-real time and OWDP is used at KNMI to produce the Ocean and Sea Ice (OSI) SAF wind product which is made available to users. A beta version of OWDP is also

Stoffelen, Ad

422

The Curious Case of Indian Ocean Warming  

Science Journals Connector (OSTI)

Recent studies have pointed out an increased warming over the Indian Ocean warm pool (the central-eastern Indian Ocean characterized by sea surface temperatures greater than 28.0°C) during the past half-century, although the reasons behind this ...

Mathew Koll Roxy; Kapoor Ritika; Pascal Terray; Sébastien Masson

2014-11-01T23:59:59.000Z

423

Aquantis Ocean Current Turbine Development Project Report  

SciTech Connect (OSTI)

The Aquantis® Current Plane (“C-Plane”) technology developed by Dehlsen Associates, LLC (DA) and Aquantis, Inc. is an ocean current turbine designed to extract kinetic energy from ocean currents. The technology is capable of achieving competitively priced base-load, continuous, and reliable power generation from a source of renewable energy not before possible in this scale or form.

Fleming, Alex J.

2014-08-23T23:59:59.000Z

424

Seasonal thermal energy storage  

SciTech Connect (OSTI)

This report describes the following: (1) the US Department of Energy Seasonal Thermal Energy Storage Program, (2) aquifer thermal energy storage technology, (3) alternative STES technology, (4) foreign studies in seasonal thermal energy storage, and (5) economic assessment.

Allen, R.D.; Kannberg, L.D.; Raymond, J.R.

1984-05-01T23:59:59.000Z

425

Ocean Motion International LLC | Open Energy Information  

Open Energy Info (EERE)

Ocean Motion International LLC Ocean Motion International LLC Jump to: navigation, search Name Ocean Motion International LLC Place Saulsbury, Tennessee Zip 38067 Sector Ocean Product Marine energy technology firm developing ocean/ wave powered generators. Coordinates 35.052242°, -89.083299° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.052242,"lon":-89.083299,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

426

A predictive ocean oil spill model  

SciTech Connect (OSTI)

This is the final report of a two-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Initially, the project focused on creating an ocean oil spill model and working with the major oil companies to compare their data with the Los Alamos global ocean model. As a result of this initial effort, Los Alamos worked closely with the Eddy Joint Industry Project (EJIP), a consortium oil and gas producing companies in the US. The central theme of the project was to use output produced from LANL`s global ocean model to look in detail at ocean currents in selected geographic areas of the world of interest to consortium members. Once ocean currents are well understood this information could be used to create oil spill models, improve offshore exploration and drilling equipment, and aid in the design of semi-permanent offshore production platforms.

Sanderson, J.; Barnette, D. [Sandia National Labs., Albuquerque, NM (United States); Papodopoulos, P. [Oak Ridge National Lab., TN (United States); Schaudt, K. [Marathon Oil Co., Littleton, CO (United States); Szabo, D. [Mobil Research and Development Corp., Dallas, TX (United States)

1996-07-01T23:59:59.000Z

427

Clean Cities: Ocean State Clean Cities coalition  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Ocean State Clean Cities Coalition Ocean State Clean Cities Coalition The Ocean State Clean Cities coalition works with vehicle fleets, fuel providers, community leaders, and other stakeholders to reduce petroleum use in transportation. Ocean State Clean Cities coalition Contact Information Wendy Lucht 401-874-2792 wlucht@uri.edu Coalition Website Clean Cities Coordinator Wendy Lucht Photo of Wendy Lucht Wendy Lucht has worked as the Ocean State Clean Cities coordinator at the University of Rhode Island (URI) since 2008 but has worked at URI since 1999. Lucht is working to make Rhode Island the first state certified by Project Get Ready, an initiative preparing cities and states for the arrival of plug-in hybrid electric vehicles (PHEV). As part of this effort, Lucht is serving as chair of the fleet-acquisition committee working on

428

Thermal unobtainiums? The perfect thermal conductor and  

E-Print Network [OSTI]

contribute to thermal resistance · Isotopically pure diamond has highest thermal conductivity of any material materials: disordered layered crystals Conclude with some thoughts on promising, high-risk, research even in a computer model. #12;Thermal resistance is created by Umklapp scattering (U

Braun, Paul

429

Mapping and Assessment of the United States Ocean Wave Energy...  

Broader source: Energy.gov (indexed) [DOE]

Mapping and Assessment of the United States Ocean Wave Energy Resource Mapping and Assessment of the United States Ocean Wave Energy Resource This report describes the analysis and...

430

Assessment of Energy Production Potential from Ocean Currents...  

Broader source: Energy.gov (indexed) [DOE]

Ocean Currents along the United States Coastline Assessment of Energy Production Potential from Ocean Currents along the United States Coastline Report summarizing the results of...

431

Turner Hunt Ocean Renewable (TRL 4 System) - THOR's Power Method...  

Broader source: Energy.gov (indexed) [DOE]

Turner Hunt Ocean Renewable (TRL 4 System) - THOR's Power Method for Hydrokinetic Devices Turner Hunt Ocean Renewable (TRL 4 System) - THOR's Power Method for Hydrokinetic Devices...

432

Regime for Marine Scientific Research in the Indian Ocean Region  

Science Journals Connector (OSTI)

Structural leadership by power-based actors was seen as fundamental by ... IOGOOS members to the successful establishment of an Ocean Observing System in the Indian Ocean.

Manoj Gupta

2010-01-01T23:59:59.000Z

433

Tensile stiffness analysis on ocean dynamic power umbilical  

Science Journals Connector (OSTI)

Tensile stiffness of ocean dynamic power umbilical is an important design parameter for ... for the estimation of tensile stiffness of the ocean dynamic power umbilical.

Ming-gang Tang ???; Jun Yan ? ?; Ye Wang ? ?; Qian-jin Yue ???

2014-04-01T23:59:59.000Z

434

Respiration and ammonium excretion by open ocean gelatinous  

Science Journals Connector (OSTI)

Mar 26, 1976 ... divers in the western North Atlantic Ocean. In situ rates of ... open ocean regions, however, there is little ..... power functions of body protein (mg.

2000-01-05T23:59:59.000Z

435

Ocean dynamics and thermodynamics in the tropical Indo- Pacific region.  

E-Print Network [OSTI]

??The Indonesian archipelago links the tropical Indian and western Pacific Oceans, so transmission of oceanic and atmospheric energy across the archipelago has the potential to… (more)

Drushka, Kyla

2011-01-01T23:59:59.000Z

436

Oxygen-nutrient relationships in the Pacific Ocean  

Science Journals Connector (OSTI)

Aug 18, 1972 ... In the northeastern Pacific Ocean the oxygen-phosphate ... different stations in the Pacific and Indian Oceans to study their water masses.

2000-01-04T23:59:59.000Z

437

Global ocean wind power sensitivity to surface layer stability  

E-Print Network [OSTI]

for the first time, the global ocean 80 m wind power and tofirst time, wind power at 80 m (typical wind turbine hub height) above the global ocean

Capps, Scott B; Zender, Charles S

2009-01-01T23:59:59.000Z

438

Efficient and robust gradient enhanced Kriging emulators.  

SciTech Connect (OSTI)

%E2%80%9CNaive%E2%80%9D or straight-forward Kriging implementations can often perform poorly in practice. The relevant features of the robustly accurate and efficient Kriging and Gradient Enhanced Kriging (GEK) implementations in the DAKOTA software package are detailed herein. The principal contribution is a novel, effective, and efficient approach to handle ill-conditioning of GEK's %E2%80%9Ccorrelation%E2%80%9D matrix, RN%CC%83, based on a pivoted Cholesky factorization of Kriging's (not GEK's) correlation matrix, R, which is a small sub-matrix within GEK's RN%CC%83 matrix. The approach discards sample points/equations that contribute the least %E2%80%9Cnew%E2%80%9D information to RN%CC%83. Since these points contain the least new information, they are the ones which when discarded are both the easiest to predict and provide maximum improvement of RN%CC%83's conditioning. Prior to this work, handling ill-conditioned correlation matrices was a major, perhaps the principal, unsolved challenge necessary for robust and efficient GEK emulators. Numerical results demonstrate that GEK predictions can be significantly more accurate when GEK is allowed to discard points by the presented method. Numerical results also indicate that GEK can be used to break the curse of dimensionality by exploiting inexpensive derivatives (such as those provided by automatic differentiation or adjoint techniques), smoothness in the response being modeled, and adaptive sampling. Development of a suitable adaptive sampling algorithm was beyond the scope of this work; instead adaptive sampling was approximated by omitting the cost of samples discarded by the presented pivoted Cholesky approach.

Dalbey, Keith R.

2013-08-01T23:59:59.000Z

439

Thermal Control & System Integration  

Broader source: Energy.gov [DOE]

The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies....

440

Thermally induced velocity gradients in electroosmotic microchannel flows: the cooling influence of optical infrastructure  

E-Print Network [OSTI]

of optical infrastructure David Sinton, Xiangchun Xuan, Dongqing Li Abstract An axially non visuali- zation (Sinton 2004) and fluid handling in capillaries and microfluidic chips (Stone et al. 2004

Xuan, Xiangchun "Schwann"

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

ESTIMATION OF IN-SITU THERMAL CONDUCTIVITIES FROM TEMPERATURE GRADIENT MEASUREMENTS  

E-Print Network [OSTI]

in the fluid, and the rate of heat transfer from the fluidSpi11ette t A.G~t "Heat Transfer During Hot Fluid Injectionin the fluid is solved, the heat transfer at the wall is

Hoang, V.T.

2010-01-01T23:59:59.000Z

442

Toward Single Crystal Thin Films of Terthiophene by Directional Crystallization Using a Thermal Gradient  

Science Journals Connector (OSTI)

We would like to thank Anne de Wit, Pierre Colinet, and Benoît Haut for their help with the heat transfer simulations and Linkam for technical assistance with the hot plate. ... Price, C. P.; Grzesiak, A. L.; Matzger, A. J. J. Am. ...

Guillaume Schweicher; Nicolas Paquay; Claire Amato; Roland Resel; Markus Koini; Samuel Talvy; Vincent Lemaur; Je?ro?me Cornil; Yves Geerts; Gabin Gbabode

2011-06-27T23:59:59.000Z

443

THERMAL GRADIENT MIGRATION OF BRINE INCLUSIONS IN SYNTHETIC ALKALI HALIDE SINGLE CRYSTALS  

E-Print Network [OSTI]

Nuclear Engineering Program, University of Illinois, Urbana, Illinois This work was supported by the Director, Office of Energy Research,

Olander, D.R.

2014-01-01T23:59:59.000Z

444

Regulation of thermal conductivity in hot galaxy clusters by MHD turbulence  

E-Print Network [OSTI]

The role of thermal conduction in regulating the thermal behavior of cooling flows in galaxy clusters is reexamined. Recent investigations have shown that the anisotropic Coulomb heat flux caused by a magnetic field in a dilute plasma drives a dynamical instability. A long standing problem of cooling flow theory has been to understand how thermal conduction can offset radiative core losses without completely preventing them. In this Letter we propose that magnetohydrodynamic turbulence driven by the heat flux instability regulates field-line insulation and drives a reverse convective thermal flux, both of which may mediate the stabilization of the cooling cores of hot clusters. This model suggests that turbulent mixing should accompany strong thermal gradients in cooling flows. This prediction seems to be supported by the spatial distribution of metals in the central galaxies of clusters, which shows a much stronger correlation with the ambient hot gas temperature gradient than with the parent stellar population.

Steven A. Balbus; Christopher S. Reynolds

2008-06-05T23:59:59.000Z

445

Regulation of thermal conductivity in hot galaxy clusters by MHD turbulence  

E-Print Network [OSTI]

The role of thermal conduction in regulating the thermal behavior of cooling flows in galaxy clusters is reexamined. Recent investigations have shown that the anisotropic Coulomb heat flux caused by a magnetic field in a dilute plasma drives a dynamical instability. A long standing problem of cooling flow theory has been to understand how thermal conduction can offset radiative core losses without completely preventing them. In this Letter we propose that magnetohydrodynamic turbulence driven by the heat flux instability regulates field-line insulation and drives a reverse convective thermal flux, both of which may mediate the stabilization of the cooling cores of hot clusters. This model suggests that turbulent mixing should accompany strong thermal gradients in cooling flows. This prediction seems to be supported by the spatial distribution of metals in the central galaxies of clusters, which shows a much stronger correlation with the ambient hot gas temperature gradient than with the parent stellar populat...

Balbus, Steven A

2008-01-01T23:59:59.000Z

446

Sedimentary sources of old high molecular weight dissolved organic carbon from the ocean margin benthic nepheloid layer  

SciTech Connect (OSTI)

Average {sup 14}C ages of dissolved organic carbon (DOC) in the ocean are 3--6,000 years, and are influenced by old DOC from continental margins. However, sources of DOC from terrestrial, autochthonous, and sedimentary organic carbon seem to be too young to be responsible for the old DOC observed in the ocean. Since colloidal organic carbon (COC, i.e., high molecular weight DOC), which is chemically very similar to that of bulk DOC, can be effectively isolated from seawater using cross-flow ultrafiltration, it can hold clues to sources and pathways of DOC turnover in the ocean. Radiocarbon measurements on COC in the water column and benthic nepheloid layer (BNL) from two continental margin areas (the Middle Atlantic Bight and the Gulf of Mexico) and controlled laboratory experiments were carried out to study sources of old DOC in the ocean margin areas. Vertical distributions of suspended particulate matter (SPM), particulate organic carbon (POC), nitrogen (PON), and DOC in the water column and bottom waters near the sediment-water interface all demonstrate a well developed benthic nepheloid layer in both ocean margin areas. COC from the BNL was much older than COC from the overlying water column. These results, together with strong concentration gradients of SPM, POC, PON, and DOC, suggest a sedimentary source for organic carbon species and possibly for old COC as well in BNL waters. This is confirmed by the results from controlled laboratory experiments. The heterogeneity of {Delta}{sup 14}C signatures in bulk SOC thus points to a preferential release of old organic components from sediment resuspension, which can be the transport mechanism of the old benthic COC observed in ocean margin areas. Old COC from continental margin nepheloid layers may thus be a potential source of old DOC to the deep ocean.

Guo, L. Santschi, P.H.

2000-02-01T23:59:59.000Z

447

Ocean Energy Projects Developing On and Off America's Shores | Department  

Broader source: Energy.gov (indexed) [DOE]

Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores January 22, 2013 - 1:14pm Addthis Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean Power Technologies. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean

448

Ocean Energy Projects Developing On and Off America's Shores | Department  

Broader source: Energy.gov (indexed) [DOE]

Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores January 22, 2013 - 1:14pm Addthis Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean Power Technologies. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean

449

Determination of salinity gradient power potential in Québec, Canada  

Science Journals Connector (OSTI)

Electrical energy can be produced from the chemical potential difference of two liquids with dissimilar salinities. This source of energy is known as salinity gradient power. In this paper the theory the technologies used to exploit the power the major challenges and their development trends are first presented. Then a modeling of fluxes across semi permeable membranes is proposed and validated. Next an energy balance study is done in order to estimate the power potential for a given salinity gradient system. By applying this study to several rivers in Quebec the salinity power gradient potential is estimated to 45 TWh/yr based on the minimal flow rate of each river.

Y. Berrouche; P. Pillay

2012-01-01T23:59:59.000Z

450

Marine & Hydrokinetic Technologies  

Broader source: Energy.gov [DOE]

This fact sheet describes the U.S. Department of Energy’s Wind and Water Power Program efforts to develop advanced water power devices that capture energy from waves, tides, ocean currents, rivers, streams, and ocean thermal gradients.

451

Materials Science and Engineering A 490 (2008) 2635 Mechanisms of cracking and delamination within thick thermal barrier  

E-Print Network [OSTI]

. Introduction The maximum temperature capability of thermal barrier systems used in gas turbines is often that characterizes the susceptibility to delamination of thermal barrier coated (TBC) hot-section aero-turbine and sub-surface delaminations, as well as spalls. Estimates of the residual stress gradients made on cross

Hutchinson, John W.

452

Modelling ocean currents in the northern Adriatic Sea  

Science Journals Connector (OSTI)

Abstract Ocean circulation in the northern Adriatic Sea is characterised by the interactions of tidal currents, bathymetric constraints, wind forcing and density gradients induced by river input and heat exchange. The MIKE 3/21 modelling system, together with measurements of wind, waves, currents and water levels at one location, has been used to investigate the currents dynamics of the northern Adriatic basin and to assess model sensitivity to the parameterisation of different processes and implementation strategies. An assessment has been carried out against available in-situ observations (waves, currents, surface elevation, and water temperature), and also in comparison with a high-resolution modelling system (COAWST) implemented in the same area during the corresponding period. The MIKE 3/21 system was implemented for a 1-year simulation period and validation of surface elevation, wind, and waves with data indicated a good model performance, statistically very similar to the COAWST implementation. Depth-averaged, surface and bottom currents were more difficult to reproduce by both models, with the observed high variability not being fully captured by the model systems. Some of the differences between the models results may be due to model configuration, spatial resolution and the way they treat atmosphere–ocean momentum and heat transfers, turbulence, and are therefore discussed in the paper. From the thorough analysis of MIKE 3/21 system, wind is found to be the main forcing factor inducing currents in the northern Adriatic; tides and baroclinic motions were of second order, although some specific events seems to be forced by these processes. Waves were found to be highly correlated with local wind, and a rather weak wave–current interaction was observed. Even if the inclusion of wave effects trough radiation stress did not seem to lead to significant improvements in the modelled currents with MIKE 3/21, the full wave–ocean coupling in COAWST was significant in explaining small scale features, especially in the Gulf of Venice. Spectral and SVD analysis showed energy around diurnal and semidiurnal frequencies and that about 50% of variance in the current profile was explained by the first mode, which was well captured by both modelling systems.

Rodolfo Bolaños; Jacob V. Tornfeldt Sørensen; Alvise Benetazzo; Sandro Carniel; Mauro Sclavo

2014-01-01T23:59:59.000Z

453

Field Investigations And Temperature-Gradient Drilling At Marine Corps  

Open Energy Info (EERE)

Investigations And Temperature-Gradient Drilling At Marine Corps Investigations And Temperature-Gradient Drilling At Marine Corps Air-Ground Combat Center (Mcagcc), Twenty-Nine Palms, Ca Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Field Investigations And Temperature-Gradient Drilling At Marine Corps Air-Ground Combat Center (Mcagcc), Twenty-Nine Palms, Ca Details Activities (4) Areas (1) Regions (0) Abstract: The U.S. Navy's Geothermal Program Office (GPO) has been conducting geothermal exploration activities in the Camp Wilson area of Marine Corps Air-Ground Combat Center (MCAGCC), Twenty-nine Palms, CA, for almost two years. Work has included self-potential (SP) surveys, fault structure analyses using LiDAR surveys, and drilling and assessment of five (5) temperature-gradient holes. For several decades the GPO has worked

454

A gradient index sonic lens based on acoustic metamaterials  

Science Journals Connector (OSTI)

We report a method to design and characterize broadband gradient index lenses. The lenses are based on two?dimensional sonic crystals which are periodic arrangements of elastic cylinders embedded in air. It will be shown that gradient index sonic lenses built with rigid cylinders are more powerful than conventionally curved lenses. We also demonstrate that the designing possibilities increased by considering the mixture of two types of cylinders in the sonic crystal. So a gradient index lens with zero reflectance at the surface is proposed by employing a mixture of aerogel and rigid cylinders. Finally a multiple scatteringtheory has been employed to compare the performance of conventionally curved lenses and gradient index lenses. [Work supported by MEC of Spain and GVA of Valencia.

José Sánchez?Dehesa; Daniel Torrent

2007-01-01T23:59:59.000Z

455

Potential use of hollow spheres in dual gradient drilling  

E-Print Network [OSTI]

The increasing number of significant deepwater discoveries has pushed the operator and service oil companies to focus their efforts on developing new technologies to drill in deeper water. Dual gradient drilling (DGD) will allow reaching deeper...

Vera Vera, Liliana

2012-06-07T23:59:59.000Z

456

Use of gradient magnets in low emittance electron storage rings  

SciTech Connect (OSTI)

The use of gradient magnets for a low emittance electron storage ring is discussed and a magnetic lattice for a 6 GeV electron energy synchrotron radiation source adopting this feature is presented.

Vignola, G.

1985-01-01T23:59:59.000Z

457

A three-term conjugate gradient method with sufficient descent ...  

E-Print Network [OSTI]

k?1yk?1. ,. (1.2) where yk?1 is defined by yk?1 = gk ? gk?1 and · denotes the l2 ...... [15] M.R. Hestenes and E. Stiefel, Methods of conjugate gradients for solving

2009-11-02T23:59:59.000Z

458

Functionally gradient titanium-aluminide composites produced by laser cladding  

Science Journals Connector (OSTI)

The laser surface cladding of Ti-Al/TiB2...composites was investigated as a means of producing a functionally gradient material on a commercially pure Ti substrate. Single and double layers were produced. The pro...

J. H. Abboud; D. R. F. West; R. D. Rawlings

1994-07-01T23:59:59.000Z

459

A parametric study of thermomechanical behavior of functionally gradient materials  

E-Print Network [OSTI]

(FSDT) that accounts for the transverse shear strains and the rotations, coupled with a three dimensional heat conduction equation is formulated for a functionally gradient plate. Both problems are studied by varying the volume fraction of a ceramic...

Chin, Che-Doong

1996-01-01T23:59:59.000Z

460

The Hadley Circulation and the Weak Temperature Gradient Approximation  

Science Journals Connector (OSTI)

The weak temperature gradient (WTG) approximation is applied to simple shallow-water models of the Hadley circulation. While it is difficult to formally justify the use of the WTG approximation for this problem, the derived WTG solutions are ...

L. M. Polvani; A. H. Sobel

2002-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Computational Inversion of Electron Tomography Images -Gradient Flows  

E-Print Network [OSTI]

Computational Inversion of Electron Tomography Images Using L2 -Gradient Flows Guoliang Xu 1) Ming Computing Institute of Computational Mathematics, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100190, China 2) Department of Computer Sciences and Institute

Texas at Austin, University of

462

Generation of Gradients Having Complex Shapes Using Microfluidic Networks  

E-Print Network [OSTI]

Generation of Gradients Having Complex Shapes Using Microfluidic Networks Stephan K. W. Dertinger, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138 This paper describes the generation each carrying different concentrations of substances laminarly and side-by-side generated step

Prentiss, Mara

463

Thermal Management of Solar Cells  

E-Print Network [OSTI]

a better thermal conductance and when ceramic particles areor ceramic fillers that enhances thermal conductivity. Solid

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

464

A Tree-Ring Reconstruction of the Salinity Gradient in the Northern Estuary of San Francisco Bay  

E-Print Network [OSTI]

Ring Reconstruction of the Salinity Gradient in the Northernof the seasonal salinity gradient, or low salinity zone (the longitudinal salinity gradient in the northern estuary (

2011-01-01T23:59:59.000Z

465

Effects of interspecific competition and coastal oceanography on population dynamics of the Olympia oyster, Ostrea lurida, along estuarine gradients  

E-Print Network [OSTI]

across estuarine salinity gradients. Ecology 85:2539- Dalby,abundance along a salinity gradient. Ecology Lamb, E. G. andalong an estuarine salinity gradient. Oikos Etter, R. J.

Deck, Anna K.

2011-01-01T23:59:59.000Z

466

Osteochondral Interface Tissue Engineering using Macroscopic Gradients of Physicochemical Signals  

E-Print Network [OSTI]

of tissue interfaces. Yet, just because tissues are separated from one another by type, function, location, or anatomical prevalence, does not necessarily mean that the interfaces are as easily distinguishable, as the interfaces themselves are highly complex... not yield a “true” continuous gradient, it can have many discrete advantages over continuous gradients. Because of the inherent discontinuous fabrication methods (developing sections separately and fusing together), however, design effort must be placed...

Dormer, Nathan Henry

2011-04-25T23:59:59.000Z

467

Seafloor topography and tectonic elements of the Western Indian Ocean  

Science Journals Connector (OSTI)

...northerly part of the Western Indian Ocean is characterized by the...world's oceans and in the Western Indian Ocean is represented by a shallow...ocean basins. At its shallowest point (66 9 5 7 E , 17 30 2 2 S...5600 m, on the Southwest Indian Ridge (Patriat et al. 1997...

2005-01-01T23:59:59.000Z

468

Measuring the Kuroshio Current with ocean acoustic tomography Naokazu Taniguchia)  

E-Print Network [OSTI]

Measuring the Kuroshio Current with ocean acoustic tomography Naokazu Taniguchia) Graduate School 29 April 2013) Ocean current profiling using ocean acoustic tomography (OAT) was conducted proportional to temperature) and current in the ocean (Munk et al., 1995). Other than coastal sea studies (e

Frandsen, Jannette B.

469

Characterization of Prochlorococcus clades from iron-depleted oceanic regions  

E-Print Network [OSTI]

trace metal values (22). Nitrate and phosphate were monthly averages derived from the World Ocean Atlas (

Rusch, D. B; Martiny, A. C; Dupont, C. L; Halpern, A. L; Venter, J. C

2010-01-01T23:59:59.000Z

470

Trophic understanding of tunas of the Southwest Pacific Ocean  

E-Print Network [OSTI]

Trophic understanding of tunas of the Southwest Pacific Ocean WEALTH FROM OCEANS FLAGSHIP Jock of tunas of the Southwest Pacific Ocean| JWY3 | Thunnus tonggol Thunnus obesus Thunnus albacares Thunnus of the Southwest Pacific Ocean| JWY4 | Species SCA DR SIA SFA Thunnus alalunga + + + 0 Thunnus albacares + + + 0

Hawai'i at Manoa, University of

471

Distribution of anthropogenic CO2 in the Pacific Ocean  

E-Print Network [OSTI]

Distribution of anthropogenic CO2 in the Pacific Ocean C. L. Sabine,1 R. A. Feely,2 R. M. Key,3 J] This work presents an estimate of anthropogenic CO2 in the Pacific Ocean based on measurements from the WOCE tracers; 9355 Information Related to Geographic Region: Pacific Ocean; KEYWORDS: Pacific Ocean

472

Ammonium Bicarbonate Transport in Anion Exchange Membranes for Salinity Gradient Energy  

Science Journals Connector (OSTI)

Ammonium Bicarbonate Transport in Anion Exchange Membranes for Salinity Gradient Energy ... Current status of ion exchange membranes for power generation from salinity gradients ...

Geoffrey M. Geise; Michael A. Hickner; Bruce E. Logan

2013-08-22T23:59:59.000Z

473

E-Print Network 3.0 - alternating gradient focusing Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

gradient focusing Page: << < 1 2 3 4 5 > >> 1 Gradient Estimation in Global Optimization Algorithms Megan Hazen, Member, IEEE and Maya R. Gupta, Member, IEEE Summary:...

474

Single molecule studies of meso/macro porous silica materials and gradient films.  

E-Print Network [OSTI]

??The preparation of mesoporous/macroporous silica materials and polarity gradient thin film are introduced in this thesis. These porous silica materials and gradient materials have the… (more)

Ye, Fangmao

2009-01-01T23:59:59.000Z

475

Federal Energy Management Program: Hydropower and Ocean Energy Resources  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hydropower and Hydropower and Ocean Energy Resources and Technologies to someone by E-mail Share Federal Energy Management Program: Hydropower and Ocean Energy Resources and Technologies on Facebook Tweet about Federal Energy Management Program: Hydropower and Ocean Energy Resources and Technologies on Twitter Bookmark Federal Energy Management Program: Hydropower and Ocean Energy Resources and Technologies on Google Bookmark Federal Energy Management Program: Hydropower and Ocean Energy Resources and Technologies on Delicious Rank Federal Energy Management Program: Hydropower and Ocean Energy Resources and Technologies on Digg Find More places to share Federal Energy Management Program: Hydropower and Ocean Energy Resources and Technologies on AddThis.com... Energy-Efficient Products

476

An investigation of the vergence field of the wind and ocean currents of the Indian ocean  

Science Journals Connector (OSTI)

The vergence chart of the ocean currents (January) shows in the region of the equatorial counter current a distribution of the vergence that is...A. Defant.

W. van Dijk

477

Ocean heat transport in a Simple Ocean Data Assimilation (SODA): structure, mechanisms, and impacts on climate  

E-Print Network [OSTI]

that heat advection by ocean currents plays in the anthropogenic warming of the world?s oceans. From Barnet et al., 2005.???????????????????......... 14 2.1 Meridional heat transport in PW across 40N o in the Atlantic Ocean based on monthly... and (b) trend of oceanic heat transport in ! PW"decade #1 for the period 1958-2001 in SODA-1.4.2.... 29 3.2 Same as Fig. 3.1 except for SODA-1.4.0??????????????.. 31 3.3 Time-mean of zonal-averaged meridional currents in ! cm"s #1...

Zheng, Yangxing

2009-05-15T23:59:59.000Z

478

Acanthaster planci outbreaks in Vanuatu coincide with ocean productivity, furthering trends throughout the pacific ocean  

Science Journals Connector (OSTI)

This study identifies linkages between regional ocean productivity and the emergence of large Acanthaster planci starfish populations in Vanuatu. Positive correlations were found between wind stress, chlorophyll-...

Peter Houk; Jason Raubani

2010-06-01T23:59:59.000Z

479

Ocean Conditions, Salmon, and Climate Change  

E-Print Network [OSTI]

Ocean Conditions, Salmon, and Climate Change John Ferguson1 NOAA Fisheries Northwest Fisheries're finding - adult forecasts and climate change) #12;1. Past (for context) · The coastal pelagic ecosystem

480

Climate Prediction: The Limits of Ocean Models  

E-Print Network [OSTI]

We identify three major areas of ignorance which limit predictability in current ocean GCMs. One is the very crude representation of subgrid-scale mixing processes. These processes are parameterized with coefficients whose ...

Stone, Peter H.

Note: This page contains sample records for the topic "ocean thermal gradients" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Ocean Fertilization: Science, Policy, and Commerce  

E-Print Network [OSTI]

Over the past 20 years there has been growing interest in the concept of fertilizing the ocean with iron to abate global warming. This interest was catalyzed by basic scientific experiments showing that iron limits primary ...

Strong, Aaron L.

482

Particulate matter in the south Atlantic Ocean  

E-Print Network [OSTI]

The particulate matter (PM) distribution in the south Atlantic Ocean and its relationship to water masses and currents were determined from optical and hydrographic data. Attenuation coefficients were obtained by interfacing a beam transmissometer...

Wood, Megan Maria

2012-06-07T23:59:59.000Z

483

Ocean Currents and Circulation and Climate Change  

Science Journals Connector (OSTI)

The Atlantic Ocean, in particular its Meridional Overturning Circulation (MOC), is sensitive to the patterns of atmospheric forcing, in particular to that of the freshwater flux. Relatively small changes in at...

Henk A. Dijkstra

2014-07-01T23:59:59.000Z

484

Notes on global climate and ocean currents  

Science Journals Connector (OSTI)

The problems related to the role of both natural and anthropogenic factors in global climate change are considered. The role of ocean circulation in the Earth’s global thermodynamic processes is qualitatively ...

R. I. Nigmatulin

2012-02-01T23:59:59.000Z

485

Sustaining observations in the polar oceans  

Science Journals Connector (OSTI)

...propelled by environmental energy. IEEE J. Oceanic...Sandven. 2011 Recent wind driven high sea ice...Understanding Earth's polar challenges: International Polar...initial science and implementation strategy. Cambridge...92 AON Design and Implementation Task Force 2012 Designing...

2014-01-01T23:59:59.000Z

486

Estimating Oceanic Turbulence Dissipation from Seismic Images  

Science Journals Connector (OSTI)

Seismic images of oceanic thermohaline finestructure record vertical displacements from internal waves and turbulence over large sections at unprecedented horizontal resolution. Where reflections follow isopycnals, their displacements can be used ...

W. Steven Holbrook; Ilker Fer; Raymond W. Schmitt; Daniel Lizarralde; Jody M. Klymak; L. Cody Helfrich; Robert Kubichek

2013-08-01T23:59:59.000Z

487

Oceanic mass transport by mesoscale eddies  

Science Journals Connector (OSTI)

...time-mean ocean circulation transports fluid as a conveyor belt, but fluid parcels can also be trapped and transported discretely...continuously, mesoscale eddies can trap fluid parcels within the eddy core and transport them discretely...

Zhengguang Zhang; Wei Wang; Bo Qiu

2014-07-18T23:59:59.000Z

488

Ocean acidification in a geoengineering context  

Science Journals Connector (OSTI)

...R. Young 2009 From laboratory manipulations to Earth system models: scaling calcification impacts of ocean acidification...CO2-induced climate change?: Results from four Earth system models. Earth Syst. Dynam. Discuss. 3, 31-72. 10...

2012-01-01T23:59:59.000Z

489

Circulation of Tritium in the Pacific Ocean  

Science Journals Connector (OSTI)

The input of bomb tritium into the high-latitude Northern Hemisphere waters has demonstrated the spread of a tracer in three dimensions in the North Pacific Ocean. Subsurface tritium maxima in middle and low latitudes clearly show the importance ...

Rana A. Fine; Joseph L. Reid; H. Göte Östlund

1981-01-01T23:59:59.000Z

490

Planctosphaera (Hemichordata: Enteropneusta) in the Pacific Ocean  

Science Journals Connector (OSTI)

Four specimens of the unusual hemichordate larva Planctosphaera...sp., previously known only from the North Atlantic Ocean were collected by midwater trawl from depths ... 1977 and 1982. The anatomy of the Pacific

M. G. Hadfield; R. E. Young

491

Ocean Renewable Power Company | Open Energy Information  

Open Energy Info (EERE)

Power Company Power Company Jump to: navigation, search Name Ocean Renewable Power Company LLC Place Portland, Maine Zip 4101 Sector Ocean, Renewable Energy Product Ocean Renewable Power Company, LLC was founded in 2004 for the purpose of generating reliable, competitive, emission-free electricity from the energy resources of the oceans. Coordinates 45.511795°, -122.675629° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.511795,"lon":-122.675629,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

492

Ocean Map Regional | Data.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Regional Regional Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov » Communities » Ocean Featured Maps The following maps are from data sources that are regional in scope. These are some of the data sources available in the Ocean Community that are most useful in the identified region. This includes several of the human use atlases now available. Regional/State Maps .view-map-gallery .views-row { float: inherit; margin: 0; } .map-align { float: left; margin: 0 20px; } .map-gallery-thumbnail{width:202px;height:133px;} .pane-map-gallery h2.pane-title { color: #284A78 !important; font: bold 16px Georgia,"Times New Roman",Serif !important; margin-left: 25px !important; } Oregon Submarine Cables Marine Reserves and Protected areas of Oregon

493

Open Windows to the Polar Oceans  

Science Journals Connector (OSTI)

...ice drift due to steady offshore winds. Open ocean polynyas...continuous. Near the coast, offshore winds may create coastal polynyas...heat (the amount of energy necessary to change a...Sensing Center, Bergen, Norway, makes available lecture...

Peter Lemke

2001-06-01T23:59:59.000Z

494

Effect of ocean surface currents on wind stress, heat flux, and wind power input to the ocean  

E-Print Network [OSTI]

Effect of ocean surface currents on wind stress, heat flux, and wind power input to the ocean, J. T., and L. Thompson (2006), Effect of ocean surface currents on wind stress, heat flux, and wind power input to the ocean, Geophys. Res. Lett., 33, L09604, doi:10.1029/2006GL025784. 1. Introduction [2

Thompson, LuAnne

495

A: Coastal and Ocean Ecosystems Current Findings Linking Plume and Ocean Conditions to Salmon Growth and Survival  

E-Print Network [OSTI]

A: Coastal and Ocean Ecosystems ­ Current Findings Linking Plume and Ocean Conditions to Salmon/860-3313 edmundo.casillas@noaa.gov It is now recognized that throughout most of the 1980's and 1990's, ocean conditions in the Pacific Northwest region were poor, and ocean survival of Columbia River salmon

496

Technical and philosophical aspects of ocean disposal  

E-Print Network [OSTI]

Di sposai . Geological aspects Physical aspects Chemical aspects Biological aspects CHAPTER II. TECHNICAL ASPECTS OF OCEAN DISPOSAL Types of Waste Materials. Dredged materiais. Industrial wastes, DomestIc sewage wa tes Solid wastes Radloact..., can reduce the passage of light through the water column and cause damaging effects to the marine ecosystem. Each of five major oceans has pronounced gyral, or circular current motion (Fiaure 1. 1). The North Atlantic current system is comprised...

Zapatka, Marchi Charisse

1976-01-01T23:59:59.000Z

497

Assessment of Energy Production Potential from Ocean Currents along the United States Coastline  

SciTech Connect (OSTI)

Increasing energy consumption and depleting reserves of fossil fuels have resulted in growing interest in alternative renewable energy from the ocean. Ocean currents are an alternative source of clean energy due to their inherent reliability, persistence and sustainability. General ocean circulations exist in the form of large rotating ocean gyres, and feature extremely rapid current flow in the western boundaries due to the Coriolis Effect. The Gulf Stream system is formed by the western boundary current of the North Atlantic Ocean that flows along the east coastline of the United States, and therefore is of particular interest as a potential energy resource for the United States. This project created a national database of ocean current energy resources to help advance awareness and market penetration in ocean current energy resource assessment. The database, consisting of joint velocity magnitude and direction probability histograms, was created from data created by seven years of numerical model simulations. The accuracy of the database was evaluated by ORNL?s independent validation effort documented in a separate report. Estimates of the total theoretical power resource contained in the ocean currents were calculated utilizing two separate approaches. Firstly, the theoretical energy balance in the Gulf Stream system was examined using the two-dimensional ocean circulation equations based on the assumptions of the Stommel model for subtropical gyres with the quasi-geostrophic balance between pressure gradient, Coriolis force, wind stress and friction driving the circulation. Parameters including water depth, natural dissipation rate and wind stress are calibrated in the model so that the model can reproduce reasonable flow properties including volume flux and energy flux. To represent flow dissipation due to turbines additional turbine drag coefficient is formulated and included in the model. Secondly, to determine the reasonableness of the total power estimates from the Stommel model and to help determine the size and capacity of arrays necessary to extract the maximum theoretical power, further estimates of the available power based on the distribution of the kinetic power density in the undisturbed flow was completed. This used estimates of the device spacing and scaling to sum up the total power that the devices would produce. The analysis has shown that considering extraction over a region comprised of the Florida Current portion of the Gulf Stream system, the average power dissipated ranges between 4-6 GW with a mean around 5.1 GW. This corresponds to an average of approximately 45 TWh/yr. However, if the extraction area comprises the entire portion of the Gulf Stream within 200 miles of the US coastline from Florida to North Carolina, the average power dissipated becomes 18.6 GW or 163 TWh/yr. A web based GIS interface, http://www.oceancurrentpower.gatech.edu/, was developed for dissemination of the data. The website includes GIS layers of monthly and yearly mean ocean current velocity and power density for ocean currents along the entire coastline of the United States, as well as joint and marginal probability histograms for current velocities at a horizontal resolution of 4-7 km with 10-25 bins over depth. Various tools are provided for viewing, identifying, filtering and downloading the data.

Haas, Kevin

2013-09-15T23:59:59.000Z

498

Grain-scale thermoelastic stresses and spatiotemporal temperature gradients on airless bodies, implications for rock breakdown  

E-Print Network [OSTI]

Thermomechanical processes such as fatigue and shock have been suggested to cause and contribute to rock breakdown on Earth, and on other planetary bodies, particularly airless bodies in the inner solar system. In this study, we modeled grain-scale stresses induced by diurnal temperature variations on simple microstructures made of pyroxene and plagioclase on various solar system bodies. We found that a heterogeneous microstructure on the Moon experiences peak tensile stresses on the order of 100 MPa. The stresses induced are controlled by the coefficient of thermal expansion and Young's modulus of the mineral constituents, and the average stress within the microstructure is determined by relative volume of each mineral. Amplification of stresses occurs at surface-parallel boundaries between adjacent mineral grains and at the tips of pore spaces. We also found that microscopic spatial and temporal surface temperature gradients do not correlate with high stresses, making them inappropriate proxies for investig...

Molaro, Jamie L; Langer, Steve A

2015-01-01T23:59:59.000Z

499

A synthesis of marine predator migrations, distribution, species overlap, and use of Pacific Ocean Exclusive Economic Zones  

E-Print Network [OSTI]

North Pacific Ocean . . . . . . . . . . . . . . . . . . . .month in the North Pacific Ocean . . . . . . . . . . . .tracked in the Pacific Ocean during 2002-2009. Adapted from

Harrison, Autumn-Lynn

2012-01-01T23:59:59.000Z

500

Thermal spin-transfer torque in magnetic tunnel junctions (invited)  

SciTech Connect (OSTI)

The thermal spin-transfer torque (TSTT) is an effect to switch the magnetic free layer in a magnetic tunnel junction by a temperature gradient only. We present ab initio calculations of the TSTT. In particular, we discuss the influence of magnetic layer composition by considering Fe{sub x}Co{sub 1–x} alloys. Further, we compare the TSTT to the bias voltage driven STT and discuss the requirements for a possible thermal switching. For example, only for very thin barriers of 3 monolayers MgO, a thermal switching is imaginable. However, even for such a thin barrier, the TSTT is still too small for switching at the moment and further optimization is needed. In particular, the TSTT strongly depends on the composition of the ferromagnetic layer. In our current study, it turns out that at the chosen thickness of the ferromagnetic layer, pure Fe gives the highest thermal spin-transfer torque.

Heiliger, Christian, E-mail: christian.heiliger@physik.uni-giessen.de; Franz, C.; Czerner, Michael [I. Physikalisches Institut, Justus Liebig University, Giessen (Germany)

2014-05-07T23:59:59.000Z