Powered by Deep Web Technologies
Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

MHK Technologies/Kinetic Hydropower System KHPS | Open Energy Information  

Open Energy Info (EERE)

Kinetic Hydropower System KHPS Kinetic Hydropower System KHPS < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Verdantpower.jpg Technology Profile Primary Organization Verdant Power Project(s) where this technology is utilized *MHK Projects/Roosevelt Island Tidal Energy RITE *MHK Projects/Cornwall Ontario River Energy CORE Technology Resource Click here Current/Tidal Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 7/8: Open Water System Testing & Demonstration & Operation Technology Description Verdant Power's central technology is the Kinetic Hydropower System (KHPS), a water-to-wire system that consists of three main components: 1) KHPS TURBINE: a three-bladed horizontal-axis turbine with four major assemblies: a) Composite rotor with 3-fixed blades that rotate at the relatively slow and constant speed of approximately 40 RPM, with tip-speeds of 35 feet per second. This is well below normal water vessel propeller speeds and conventional hydropower turbine blade speeds. b) Sealed nacelle, pylon and passive yaw mechanism that is hydrodynamically designed to allow the turbine to self-rotate into the prevailing current (like a weathervane) so that the blades are optimally aligned to generate energy. c) Custom-designed drivetrain unit (with induction generator) enclosed within the nacelle that integrates the bearing housing with a special long-life planetary gearbox, with mechanical shaft seals and a minimum of sealed lubricants. d) Streambed mounting system that can vary depending on site conditions as a single drilled monopile, a single gravity-based structure, or a gravity-based triframe mount that supports 3 turbines. 2) UNDERWATER CABLING: low-voltage shielded cable of short distance; and shoreline switchgear vaults, control room, and interconnection point(s). 3) APPURTENANT FACILITIES: for navigation safety, such as Public Aides to Navigation (PATON) buoys and lighted warning signs, as well as instrumentation including Acoustic Doppler Current Profilers (ADCPs). In order to maximize the application of the KHPS within the global MHK resource, Verdant Power has designed the technology as a simple and uniquely scalable system that can be operated in tidal, river and ocean current settings. Possible KHPS installations range from distributed generation arrangements in near-shore urban and village settings to base power generation at offshore deepwater locales.

2

Energy 101: Hydropower  

ScienceCinema (OSTI)

Learn how hydropower captures the kinetic energy of flowing water and turns it into electricity for our homes and businesses.

None

2013-04-24T23:59:59.000Z

3

Energy 101: Hydropower  

SciTech Connect

Learn how hydropower captures the kinetic energy of flowing water and turns it into electricity for our homes and businesses.

None

2013-04-01T23:59:59.000Z

4

Hydropower Projects  

Energy.gov (U.S. Department of Energy (DOE))

This report covers the Wind and Water Power Technologies Office's hydropower project funding from fiscal years 2008 to 2014.

5

Types of Hydropower Plants  

Energy.gov (U.S. Department of Energy (DOE))

There are three types of hydropower facilities: impoundment, diversion, and pumped storage. Some hydropower plants use dams and some do not. The images below show both types of hydropower plants.

6

Flexible hydropower: boosting energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Flexible hydropower: boosting energy Flexible hydropower: boosting energy New hydroelectric resource for Northern New Mexico supplies clean energy to homes, businesses and the Lab....

7

Improved Structure and Fabrication of Large, High-Power KHPS Rotors - Final Scientific/Technical Report  

SciTech Connect

Verdant Power, Inc, working in partnership with the National Renewable Energy Laboratory (NREL), Sandia National Laboratories (SNL), and the University of Minnesota St. Anthony Falls Laboratory (SAFL), among other partners, used evolving Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) models and techniques to improve the structure and fabrication of large, high-power composite Kinetic Hydropower System (KHPS) rotor blades. The objectives of the project were to: design; analyze; develop for manufacture and fabricate; and thoroughly test, in the lab and at full scale in the water, the improved KHPS rotor blade.

Corren, Dean [Verdant Power, Inc.; Colby, Jonathan [Verdant Power, Inc.; Adonizio, Mary Ann [Verdant Power, Inc.

2013-01-29T23:59:59.000Z

8

Hydropower Potential Screening Study  

E-Print Network (OSTI)

Hydropower Potential Screening Study Gillian Charles GRAC 5/28/14 #12;Latest Hydropower Potential Study Creating a Buzz 2014 DOE study on undeveloped stream reaches 84.7 GW undeveloped hydropower in undeveloped stream reaches hydropower in the PNW #12;Studies at both National

9

National Hydropower Map  

Energy.gov (U.S. Department of Energy (DOE))

High-resolution map produced by Oak Ridge National Laboratory showing hydropower resources throughout the United States.

10

2015 Forum on Hydropower  

Energy.gov (U.S. Department of Energy (DOE))

Discover how Canadian hydropower is learning lessons and building the future. Get updated on greenfield, rehabilitation, refurbishment and expansion projects going on across the country. Learn how...

11

National Hydropower Association conference proceedings  

SciTech Connect

These proceedings collect papers on hydroelectricity. Topics include legal developments in hydropower regulation, an overview of the small hydro industry, and financing hydropower projects.

Not Available

1985-01-01T23:59:59.000Z

12

Conventional Hydropower Technologies (Fact Sheet)  

SciTech Connect

This fact sheet describes the DOE Water Power Program's conventional hydropower research and development efforts.

Not Available

2011-07-01T23:59:59.000Z

13

Hydropower Research & Development | Department of Energy  

Energy Savers (EERE)

Development Hydropower Research & Development Hydropower Research & Development The Water Power Program's hydropower research and development (R&D) efforts focus on advancing...

14

Benefits of Hydropower  

K-12 Energy Lesson Plans and Activities Web site (EERE)

There are many advantages to hydropower than conventional methods of generating electricity, from being a renewable, sustainable resource, to being a reliable back-up source of energy when there are disruptions to electricity.

15

Hydropower Memorandum of Understanding  

Energy.gov (U.S. Department of Energy (DOE))

On March 24, 2010, the Department of the Army (DOA) through the U.S. Army Corps of Engineers (USACE or Corps), the Department of Energy, and the Department of the Interior signed the Memorandum of Understanding (MOU) for Hydropower. The purpose of the MOU is to “help meet the nation’s needs for reliable, affordable, and environmentally sustainable hydropower by building a long

16

hydropower | OpenEI  

Open Energy Info (EERE)

hydropower hydropower Dataset Summary Description No description given. Source National Renewable Energy Laboratory Date Released July 03rd, 2012 (2 years ago) Date Updated July 03rd, 2012 (2 years ago) Keywords biopower csp geothermal hydropower hydrothermal Renewable Energy Technical Potential rooftop United States utility-scale wind Data text/csv icon United States Renewable Energy Technical Potential (csv, 7.7 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL) Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote Overall rating Average vote Your vote

17

Top 10 Things You Didn't Know about Hydropower | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

about Hydropower about Hydropower Top 10 Things You Didn't Know about Hydropower April 19, 2013 - 3:49pm Addthis Learn how hydropower captures the kinetic energy of flowing water and turns it into electricity for our homes and businesses. | Video by the Energy Department. Mike Reed Water Power Program Manager, Water Power Program LEARN MORE Stay up to date on hydropower, marine and hydrokinetic energy technologies by visiting energy.gov/water. This article is part of the Energy.gov series highlighting the "Top Things You Didn't Know About..." Be sure to check back for more entries soon. 10. Hydropower is one of the oldest power sources on the planet, generating power when flowing water spins a wheel or turbine. It was used by farmers as far back as ancient Greece for mechanical tasks like grinding grain.

18

Top 10 Things You Didn't Know about Hydropower | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Top 10 Things You Didn't Know about Hydropower Top 10 Things You Didn't Know about Hydropower Top 10 Things You Didn't Know about Hydropower April 19, 2013 - 3:49pm Addthis Learn how hydropower captures the kinetic energy of flowing water and turns it into electricity for our homes and businesses. | Video by the Energy Department. Mike Reed Water Power Program Manager, Water Power Program LEARN MORE Stay up to date on hydropower, marine and hydrokinetic energy technologies by visiting energy.gov/water. This article is part of the Energy.gov series highlighting the "Top Things You Didn't Know About..." Be sure to check back for more entries soon. 10. Hydropower is one of the oldest power sources on the planet, generating power when flowing water spins a wheel or turbine. It was used by farmers as far back as ancient Greece for mechanical tasks like grinding grain.

19

High Power Cryogenic Targets  

SciTech Connect

The development of high power cryogenic targets for use in parity violating electron scattering has been a crucial ingredient in the success of those experiments. As we chase the precision frontier, the demands and requirements for these targets have grown accordingly. We discuss the state of the art, and describe recent developments and strategies in the design of the next generation of these targets.

Gregory Smith

2011-08-01T23:59:59.000Z

20

NREL: Learning - Pumped Hydropower  

NLE Websites -- All DOE Office Websites (Extended Search)

Pumped Hydropower Pumped Hydropower Pumped hydro facilities use off-peak electricity to pump water from a lower reservoir into one at a higher elevation. When the water stored in the upper reservoir is released, it is passed through hydraulic turbines to generate electricity. The off-peak electrical energy used to pump the water up hill can be stored indefinitely as gravitational energy in the upper reservoir. Thus, two reservoirs in combination can be used to store electrical energy for a long period of time, and in large quantities. Utilities generally prefer to operate large coal and nuclear power stations at full power all the time (referred to as "baseload generation"), so in the middle of the night, these plants often produce more power than is needed. Pumped hydro energy storage can be used to smooth out the demand

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

How Hydropower Works | Department of Energy  

Energy Savers (EERE)

How Hydropower Works How Hydropower Works Content on this page requires a newer version of Adobe Flash Player. Get Adobe Flash player Hydropower is using water to power machinery...

22

National Hydropower Association Annual Conference  

Energy.gov (U.S. Department of Energy (DOE))

Join industry leaders, state and federal regulatory officials, and key legislative staff to discuss technology, policy and future development options for the hydropower industry at the National...

23

History of Hydropower | Department of Energy  

Energy Savers (EERE)

History of Hydropower History of Hydropower Humans have been harnessing water to perform work for thousands of years. The Greeks used water wheels for grinding wheat into flour...

24

NREL: Climate Neutral Research Campuses - Hydropower  

NLE Websites -- All DOE Office Websites (Extended Search)

organizations that are not electric utilities. The following resources explain the fundamentals of hydropower and ocean energy technologies: Hydropower Basics: The DOE Wind...

25

Pumped Storage Hydropower (Detailed Analysis to Demonstrate Value...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pumped Storage Hydropower (Detailed Analysis to Demonstrate Value)-Modeling and Analysis of Value of Advanced Pumped Storage Hydropower in the U.S. Pumped Storage Hydropower...

26

High power connection system  

DOE Patents (OSTI)

A high power connection system adapted for automotive environments which provides environmental and EMI shielding includes a female connector, a male connector, and a panel mount. The female connector includes a female connector base and a snap fitted female connector cover. The male connector includes a male connector base and a snap fitted male connector cover. The female connector base has at least one female power terminal cavity for seatably receiving a respective female power terminal. The male connector base has at least one male power terminal cavity for seatably receiving a respective male power terminal. The female connector is covered by a cover seal and a conductive shroud. A pair of lock arms protrude outward from the front end of the male connector base, pass through the panel mount and interface with a lever of a lever rotatably connected to the shroud to thereby mechanically assist mating of the male and female connectors. Safety terminals in the male and female connectors provide a last-to-connect-first-to-break connection with an HVIL circuit.

Schaefer, Christopher E. (Warren, OH); Beer, Robert C. (Noblesville, IN); McCall, Mark D. (Youngstown, OH)

2000-01-01T23:59:59.000Z

27

Hydropower Basics | Department of Energy  

Energy Savers (EERE)

Basics Hydropower Basics Content on this page requires a newer version of Adobe Flash Player. Get Adobe Flash player Most people associate water power with the Hoover Dam -- a huge...

28

Hydropower Technology Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydropower Technology Basics Hydropower Technology Basics Hydropower Technology Basics August 14, 2013 - 3:03pm Addthis Text Version Photo of the reservoir in front of a hydropower dam. Hydropower, or hydroelectric power, is the most common and least expensive source of renewable electricity in the United States today. According to the Energy Information Administration, more than 6% of the country's electricity was produced from hydropower resources in 2008, and about 70% of all renewable electricity generated in the United States came from hydropower resources. Hydropower technologies have a long history of use because of their many benefits, including high availability and lack of emissions. Hydropower technologies use flowing water to create energy that can be captured and turned into electricity. Both large and small-scale power

29

Hydropower Technology Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydropower Technology Basics Hydropower Technology Basics Hydropower Technology Basics August 14, 2013 - 3:03pm Addthis Text Version Photo of the reservoir in front of a hydropower dam. Hydropower, or hydroelectric power, is the most common and least expensive source of renewable electricity in the United States today. According to the Energy Information Administration, more than 6% of the country's electricity was produced from hydropower resources in 2008, and about 70% of all renewable electricity generated in the United States came from hydropower resources. Hydropower technologies have a long history of use because of their many benefits, including high availability and lack of emissions. Hydropower technologies use flowing water to create energy that can be captured and turned into electricity. Both large and small-scale power

30

CLIMATE CHANGE EFFECTS ON THE HIGHELEVATION HYDROPOWER  

E-Print Network (OSTI)

CLIMATE CHANGE EFFECTS ON THE HIGHELEVATION HYDROPOWER SYSTEM Energy Commission's California Climate Change Center JULY 2012 CEC5002012020 Prepared for: California consideration of climate change effects on highelevation hydropower supply and demand in California. Artificial

31

Harnessing Hydropower: The Earth's Natural Resource  

SciTech Connect

This document is a layman's overview of hydroelectric power. It includes information on: History of Hydropower; Nature’s Water Cycle; Hydropower Plants; Turbines and Generators; Transmission Systems; power dispatching centers; and Substations. It goes on to discuss The Power Grid, Hydropower in the 21st Century; Energy and the Environment; and how hydropower is useful for Meeting Peak Demands. It briefly addresses how Western Area Power Administration is Responding to Environmental Concerns.

none,

2011-04-01T23:59:59.000Z

32

Federal Memorandum of Understanding for Hydropower/Resources | Open Energy  

Open Energy Info (EERE)

Memorandum of Understanding for Hydropower/Resources Memorandum of Understanding for Hydropower/Resources < Federal Memorandum of Understanding for Hydropower Jump to: navigation, search Federal Memorandum of Understanding for Hydropower Hydroelectric-collage2.jpg Home Federal Inland Hydropower Working Group Participating Agencies Resources MOU Related Resources Hydropower Resources Assessment at Existing Reclamation Facilities An Assessment of Energy Potential at Non-Powered Dams in the United States Assessment of Potential Capacity Increases at Existing Hydropower Plants Site Inventory and Hydropower Energy Assessment of Reclamation Owned Conduits Potential Hydroelectric Development at Existing Federal Facilities Advanced Conventional Hydropower Planning and Operation Analysis Tools The Integrated Basin-Scale Opportunity Assessment Initiative, FY

33

Optimal Hydropower Reservoir Operation with Environmental Requirements MARCELO ALBERTO OLIVARES  

E-Print Network (OSTI)

Optimal Hydropower Reservoir Operation with Environmental Requirements By MARCELO ALBERTO OLIVARES Engineering Optimal Hydropower Reservoir Operation with Environmental Requirements Abstract Engineering solutions to the environmental impacts of hydropower operations on downstream aquatic ecosystem are studied

Lund, Jay R.

34

ORIGINAL ARTICLE Hydropower development in the lower Mekong basin  

E-Print Network (OSTI)

ORIGINAL ARTICLE Hydropower development in the lower Mekong basin: alternative approaches to deal hydropower generation and potentially irreversible negative impacts on the ecosystems that provide hydropower generation and potentially irreversible negative impacts on the ecosystems that provide

Vermont, University of

35

Sensor Fish Re-design to Support Advance Hydropower Development...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Sensor Fish Re-design to Support Advance Hydropower Development Sensor Fish Re-design to Support Advance Hydropower Development Sensor Fish Re-design to Support Advance Hydropower...

36

Hydropower Resource Assessment and Characterization | Department...  

Energy Savers (EERE)

Assessment and Characterization Hydropower Resource Assessment and Characterization The Water Power Program has released reports and maps that assess the total technically...

37

Hydropower Market Acceleration and Deployment | Department of...  

Office of Environmental Management (EM)

Impacts and Mitigation Hydropower can have adverse environmental impacts on fish populations and migrations, on water quality in reservoirs and downstream from dams,...

38

Hydropower and Ocean Energy Resources and Technologies  

Energy.gov (U.S. Department of Energy (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.

39

Federal Memorandum of Understanding for Hydropower/Federal Inland  

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 » Federal Memorandum of Understanding for Hydropower/Federal Inland Hydropower Working Group < Federal Memorandum of Understanding for Hydropower Jump to: navigation, search Federal Memorandum of Understanding for Hydropower Hydroelectric-collage2.jpg Home Federal Inland Hydropower Working Group Participating Agencies Resources Federal Inland Hydropower Working Group The Federal Inland Hydropower Working Group is made up of 15 federal entities involved in the regulation, management, or development of hydropower resources (including hydrokinetics) in rivers and streams of the

40

Federal Energy Management Program: Hydropower and Ocean Energy Resources  

NLE Websites -- All DOE Office Websites (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

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Quantifying the Value of Hydropower in the Electric Grid: Final...  

Energy Savers (EERE)

research to Quantify the Value of Hydropower in the Electric Grid. This 3-year DOE study focused on defining value of hydropower assets in a changing electric grid....

42

High power gas laser amplifier  

DOE Patents (OSTI)

A high power output CO.sub.2 gas laser amplifier having a number of sections, each comprising a plurality of annular pumping chambers spaced around the circumference of a vacuum chamber containing a cold cathode, gridded electron gun. The electron beam from the electron gun ionizes the gas lasing medium in the sections. An input laser beam is split into a plurality of annular beams, each passing through the sections comprising one pumping chamber.

Leland, Wallace T. (Los Alamos, NM); Stratton, Thomas F. (Los Alamos, NM)

1981-01-01T23:59:59.000Z

43

Stream-reach Identification for New Run-of-River Hydropower Development through a Merit Matrix Based Geospatial Algorithm  

SciTech Connect

Even after a century of development, the total hydropower potential from undeveloped rivers is still considered to be abundant in the United States. However, unlike evaluating hydropower potential at existing hydropower plants or non-powered dams, locating a feasible new hydropower plant involves many unknowns, and hence the total undeveloped potential is harder to quantify. In light of the rapid development of multiple national geospatial datasets for topography, hydrology, and environmental characteristics, a merit matrix based geospatial algorithm is proposed to help identify possible hydropower stream-reaches for future development. These hydropower stream-reaches sections of natural streams with suitable head, flow, and slope for possible future development are identified and compared using three different scenarios. A case study was conducted in the Alabama-Coosa-Tallapoosa (ACT) and Apalachicola-Chattahoochee-Flint (ACF) hydrologic subregions. It was found that a merit matrix based algorithm, which is based on the product of hydraulic head, annual mean flow, and average channel slope, can help effectively identify stream-reaches with high power density and small surface inundation. The identified stream-reaches can then be efficiently evaluated for their potential environmental impact, land development cost, and other competing water usage in detailed feasibility studies . Given that the selected datasets are available nationally (at least within the conterminous US), the proposed methodology will have wide applicability across the country.

Pasha, M. Fayzul K. [California State University, Fresno; Yeasmin, Dilruba [ORNL; Kao, Shih-Chieh [ORNL; Hadjerioua, Boualem [ORNL; Wei, Yaxing [ORNL; Smith, Brennan T [ORNL

2014-01-01T23:59:59.000Z

44

Considering Climate Change in Hydropower Relicensing  

E-Print Network (OSTI)

Considering Climate Change in Hydropower Relicensing ENVIRONMENTAL AREA RESEARCH PIER Environmental climate change when relicensing hydropower units, stating that there is a lack of scientific information this project, researchers are conducting an environmental study on climate change for the Yuba River

45

U.S. Hydropower Resource Assessment - California  

SciTech Connect

The U.S. Department of Energy is developing an estimate of the underdeveloped hydropower potential in the United States. For this purpose, the Idaho National Engineering and Environmental Laboratory developed a computer model called Hydropower Evaluation Software (HES). HES measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of California.

A. M. Conner; B. N. Rinehart; J. E. Francfort

1998-10-01T23:59:59.000Z

46

US hydropower resource assessment for Utah  

SciTech Connect

The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Utah.

Francfort, J.E.

1993-12-01T23:59:59.000Z

47

US hydropower resource assessment for Colorado  

SciTech Connect

The US Department of Energy is developing an estimate of the hydropower development potential in this country. Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE, menu-driven software application. HES allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Colorado.

Francfort, J.E.

1994-05-01T23:59:59.000Z

48

Hydropower: Setting a Course for Our Energy Future  

SciTech Connect

Hydropower is an annual publication that provides an overview of the Department of Energy's Hydropower Program. The mission of the program is to conduct research and development that will increase the technical, societal, and environmental benefits of hydropower and provide cost-competitive technologies that enable the development of new and incremental hydropower capacity.

Not Available

2004-07-01T23:59:59.000Z

49

Hydropower'10 6th International Hydropower Conference, 13 February 2010, Troms, NORWAY Understanding Future Climate Impacts on Scotland's  

E-Print Network (OSTI)

Hydropower'10 ­ 6th International Hydropower Conference, 13 February 2010, Tromsø, NORWAY Understanding Future Climate Impacts on Scotland's Hydropower Resource Niall Duncan*, Gareth. P. Harrison and A energy by 2020. As hydropower currently makes up over 10% (1383 MW) of Scotland's installed generation

Harrison, Gareth

50

Idaho National Laboratory - Hydropower Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Research and Development Engineering Research and Development 1997 Alden Research Laboratory, Inc. and Northern Research and Engineering Corporation, 1997, Development of a More Fish-Tolerant Turbine Runner, Advanced Hydropower Turbine Project, ARL Report No. 13-97/M63F, DOE/ID-10571. Alden Research Laboratory, Inc. and Northern Research and Engineering Corporation conducted a research program to develop a turbine runner which will minimize fish injury and mortality at hydroelectric projects. An existing pump impeller provided the starting point for developing the fish-tolerant turbine runner. The Hidrostal pump is a single-bladed combined screw/centrifugal pump which has been proven to transport fish with minimal injury. The focus of this research project was to develop a new runner geometry which is effective in downstream fish passage and

51

Brainpower for Hydropower | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Brainpower for Hydropower Brainpower for Hydropower Brainpower for Hydropower May 10, 2012 - 4:27pm Addthis Mark Cecchini-Beaver at the University of Idaho is one of ten new participants in the Hydro Fellowship Program. | Photo courtesy of the Hydro Research Foundation. Mark Cecchini-Beaver at the University of Idaho is one of ten new participants in the Hydro Fellowship Program. | Photo courtesy of the Hydro Research Foundation. Jonathan Bartlett Wind Powering America National Coordinator What are the key facts? Today the Energy Department announced 2012 selections for the Hydro Fellowship Program. This fellowship program provides participants with financial assistance and the opportunity to pursue a variety of hydropower research topics. Today, the Energy Department, in cooperation with the Hydro Research

52

Brainpower for Hydropower | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Brainpower for Hydropower Brainpower for Hydropower Brainpower for Hydropower May 10, 2012 - 4:27pm Addthis Mark Cecchini-Beaver at the University of Idaho is one of ten new participants in the Hydro Fellowship Program. | Photo courtesy of the Hydro Research Foundation. Mark Cecchini-Beaver at the University of Idaho is one of ten new participants in the Hydro Fellowship Program. | Photo courtesy of the Hydro Research Foundation. Jonathan Bartlett Wind Powering America National Coordinator What are the key facts? Today the Energy Department announced 2012 selections for the Hydro Fellowship Program. This fellowship program provides participants with financial assistance and the opportunity to pursue a variety of hydropower research topics. Today, the Energy Department, in cooperation with the Hydro Research

53

Types of Hydropower Turbines | Department of Energy  

Energy Savers (EERE)

type of hydropower turbine selected for a project is based on the height of standing water-referred to as "head"-and the flow, or volume of water, at the site. Other deciding...

54

Microsoft Word - Hydropower Council Agenda 2007.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

Regional Hydropower Council Vicksburg, Mississippi June 12, 2007 Tuesday, June 12 1:00 p.m. Welcome Vicksburg District 1:05 p.m. Introductions All 1:15 p.m. Presentation of the...

55

High-Power Rf Load  

DOE Patents (OSTI)

A compact high-power RF load comprises a series of very low Q resonators, or chokes [16], in a circular waveguide [10]. The sequence of chokes absorb the RF power gradually in a short distance while keeping the bandwidth relatively wide. A polarizer [12] at the input end of the load is provided to convert incoming TE.sub.10 mode signals to circularly polarized TE.sub.11 mode signals. Because the load operates in the circularly polarized mode, the energy is uniformly and efficiently absorbed and the load is more compact than a rectangular load. Using these techniques, a load having a bandwidth of 500 MHz can be produced with an average power dissipation level of 1.5 kW at X-band, and a peak power dissipation of 100 MW. The load can be made from common lossy materials, such as stainless steel, and is less than 15 cm in length. These techniques can also produce loads for use as an alternative to ordinary waveguide loads in small and medium RF accelerators, in radar systems, and in other microwave applications. The design is easily scalable to other RF frequencies and adaptable to the use of other lossy materials.

Tantawi, Sami G. (San Mateo, CA); Vlieks, Arnold E. (Livermore, CA)

1998-09-01T23:59:59.000Z

56

Hydropower Resource Assessment of Brazilian Streams  

SciTech Connect

The Idaho National Laboratory (INL) in collaboration with the U.S. Geological Survey (USGS) with the assistance of the Empresa de Pesquisa Energetica (EPE) and the Agencia Nacional de Energia Electrica (ANEEL) has performed a comprehensive assessment of the hydropower potential of all Brazilian natural streams. The methodology by which the assessment was performed is described. The results of the assessment are presented including an estimate of the hydropower potential for all of Brazil, and the spatial distribution of hydropower potential thus providing results on a state by state basis. The assessment results have been incorporated into a geographic information system (GIS) application for the Internet called the Virtual Hydropower Prospector do Brasil. VHP do Brasil displays potential hydropower sites on a map of Brazil in the context of topography and hydrography, existing power and transportation infrastructure, populated places and political boundaries, and land use. The features of the application, which includes tools for finding and selecting potential hydropower sites and other features and displaying their attributes, is fully described.

Douglas G. Hall

2011-09-01T23:59:59.000Z

57

Advanced, High Power, Next Scale, Wave Energy Conversion Device...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advanced, High Power, Next Scale, Wave Energy Conversion Device Advanced, High Power, Next Scale, Wave Energy Conversion Device Advanced, High Power, Next Scale, Wave Energy...

58

Hydropower and Ocean Energy Resources and Technologies | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

59

1 INTRODUCTION High-head storage hydropower plants operate  

E-Print Network (OSTI)

1 INTRODUCTION High-head storage hydropower plants operate their turbines during periods of high Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland ABSTRACT: High-head storage hydropower plants

Floreano, Dario

60

Energy Department Making Hydropower More Eco-Friendly  

Office of Energy Efficiency and Renewable Energy (EERE)

Hydropower has long provided a flexible, low-cost, and renewable source of power for the United States—since the 1800s, in fact. Even today, in fact, hydropower accounted for roughly half of the...

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

High power laser perforating tools and systems  

DOE Patents (OSTI)

ystems devices and methods for the transmission of 1 kW or more of laser energy deep into the earth and for the suppression of associated nonlinear phenomena. Systems, devices and methods for the laser perforation of a borehole in the earth. These systems can deliver high power laser energy down a deep borehole, while maintaining the high power to perforate such boreholes.

Zediker, Mark S; Rinzler, Charles C; Faircloth, Brian O; Koblick, Yeshaya; Moxley, Joel F

2014-04-22T23:59:59.000Z

62

Modulation instability in high power laser amplifiers  

E-Print Network (OSTI)

. Widmayer, R. K. White, S. T. Yang, and B. M. VanWonterghem, "National Ignition Facility laser performanceModulation instability in high power laser amplifiers Alexander M. Rubenchik,1,* Sergey K. Turitsyn in high-power laser systems. The so-called B-integral restriction is commonly used as the criteria for MI

Turitsyn, Sergei K.

63

forreading. RECONCILING HYDROPOWER AND ENVIRONMENTAL WATER USES IN THE  

E-Print Network (OSTI)

O nly forreading. D o notD ow nload. RECONCILING HYDROPOWER AND ENVIRONMENTAL WATER USES Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei, China conflicting uses, hydropower and environmental, using the Leishui River basin and Dongjiang reservoir

Pasternack, Gregory B.

64

Huaneng Lancang River Hydropower | Open Energy Information  

Open Energy Info (EERE)

Lancang River Hydropower Lancang River Hydropower Jump to: navigation, search Name Huaneng Lancang River Hydropower Place Kunming, Yunnan Province, China Zip 650214 Sector Hydro, Solar Product Developer of hydro and solar power projects. Coordinates 25.051001°, 102.702011° 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":25.051001,"lon":102.702011,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

65

Commonwealth Hydropower Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Commonwealth Hydropower Program Commonwealth Hydropower Program Commonwealth Hydropower Program < Back Eligibility Commercial Fed. Government Industrial Institutional Local Government Nonprofit State Government Tribal Government Savings Category Water Buying & Making Electricity Home Weatherization Maximum Rebate Design and Construction: $600,000 Feasibility study: $40,000 Program Info Funding Source Massachusetts Renewable Energy Trust Start Date 09/2009 State Massachusetts Program Type State Grant Program Rebate Amount Design and Construction: 50% of costs or $1.00 per incremental kWh per year Feasibility study: 80% of costs Provider Massachusetts Clean Energy Center Note: This program reopened March 15, 2013. There is $1,200,000 available for Round 5; applications will be accepted on a rolling basis until funding

66

Boosting America's Hydropower Output | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Boosting America's Hydropower Output Boosting America's Hydropower Output Boosting America's Hydropower Output October 9, 2012 - 2:10pm Addthis The Boulder Canyon Hydroelectric Facility's new, highly-efficient turbine. | Photo courtesy of the city of Boulder, Colorado. The Boulder Canyon Hydroelectric Facility's new, highly-efficient turbine. | Photo courtesy of the city of Boulder, Colorado. City of Boulder employees celebrate the completion of the Boulder Canyon Hydroelectric Modernization project. | Photo courtesy of the city of Boulder, Colorado. City of Boulder employees celebrate the completion of the Boulder Canyon Hydroelectric Modernization project. | Photo courtesy of the city of Boulder, Colorado. The Boulder Canyon Hydroelectric Facility's new, highly-efficient turbine. | Photo courtesy of the city of Boulder, Colorado.

67

ENVIRONMENTAL ASSESSMENT FOR HYDROPOWER PILOT PROJECT LICENSE  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

FOR HYDROPOWER PILOT PROJECT LICENSE Admiralty Inlet Pilot Tidal Project-FERC Project No. 12690-005 (DOE/EA-1949) Washington Federal Energy Regulatory Commission Office of Energy Projects Division of Hydropower Licensing 888 First Street, NE Washington, DC 20426 U.S. Department of Energy Office of Energy Efficiency and Renewable Energy 1617 Cole Boulevard Golden, Colorado 80401 January 15, 2013 20130115-3035 FERC PDF (Unofficial) 01/15/2013 i TABLE OF CONTENTS LIST OF FIGURES ............................................................................................................ iv LIST OF TABLES............................................................................................................... v EXECUTIVE SUMMARY ................................................................................................

68

High-Power Laser Beam Cladding  

Science Journals Connector (OSTI)

This paper reports major advances in the understanding, refinement and application of high-power laser beam cladding. The most important relationships between essential laser process variables and clad characteri...

G. J. Bruck

1987-02-01T23:59:59.000Z

69

$26.6 Million for Hydropower | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

$26.6 Million for Hydropower $26.6 Million for Hydropower $26.6 Million for Hydropower April 5, 2011 - 4:52pm Addthis Ice Harbor Dam | Photo courtesy of the US Army Corps of Engineers Ice Harbor Dam | Photo courtesy of the US Army Corps of Engineers Ginny Simmons Ginny Simmons Former Managing Editor for Energy.gov, Office of Public Affairs Today, the Department of Energy and the Department of Interior announced $26.6 million of available funding for companies and entrepreneurs looking to advance hydropower. "By improving hydropower technology, we can maximize America's biggest source of renewable energy in an environmentally responsible way," said Secretary Chu. Specifically, funding is available for projects in the following four areas: Sustainable small hydropower Environmental mitigation technologies for conventional hydropower

70

&#8220;Sustainable development of hydropower in third countries: The  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Sustainable development of hydropower in third countries: Sustainable development of hydropower in third countries: The development of hydropower on a sustainable basis has been an array of humanitarian and economic development, especially for local people as well as an important tool in the fight agains “Sustainable development of hydropower in third countries: The development of hydropower on a sustainable basis has been an array of humanitarian and economic development, especially for local people as well as an important tool in the fight agains “Sustainable development of hydropower in third countries: The development of hydropower on a sustainable basis has been an array of humanitarian and economic development, especially for local people as well as an important tool in the fight against glo

71

Federal Memorandum of Understanding for Hydropower | Open Energy  

Open Energy Info (EERE)

Memorandum of Understanding for Hydropower Memorandum of Understanding for Hydropower Jump to: navigation, search Federal Memorandum of Understanding for Hydropower Hydroelectric-collage2.jpg Home Federal Inland Hydropower Working Group Participating Agencies Resources Federal Memorandum of Understanding for Hydropower On March 24, 2010, the Department of the Army through the U.S. Army Corps of Engineers, the Department of Energy, and the Department of the Interior signed the Memorandum of Understanding (MOU) for Hydropower. The purpose of the MOU is to "help meet the nation's needs for reliable, affordable, and environmentally sustainable hydropower by building a long-term working relationship, prioritizing similar goals, and aligning ongoing and future renewable energy development efforts." Additionally, the MOU aims to

72

Antu County 303 Hydropower Station Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Antu County 303 Hydropower Station Co Ltd Antu County 303 Hydropower Station Co Ltd Jump to: navigation, search Name Antu County 303 Hydropower Station Co., Ltd. Place Jilin Province, China Zip 133613 Sector Hydro Product China-based small hydro CDM project developer. References Antu County 303 Hydropower Station Co., Ltd.[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Antu County 303 Hydropower Station Co., Ltd. is a company located in Jilin Province, China . References ↑ "Antu County 303 Hydropower Station Co., Ltd." Retrieved from "http://en.openei.org/w/index.php?title=Antu_County_303_Hydropower_Station_Co_Ltd&oldid=342210" Categories: Clean Energy Organizations Companies Organizations

73

Virtual Hydropower Prospector | Open Energy Information  

Open Energy Info (EERE)

Virtual Hydropower Prospector Virtual Hydropower Prospector Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Virtual Hydropower Prospector Agency/Company /Organization: Idaho National Laboratory Sector: Energy Topics: Resource assessment Resource Type: Software/modeling tools User Interface: Website Website: hydropower.inl.gov/prospector/index.shtml Country: United States Cost: Free Northern America Coordinates: 37.09024°, -95.712891° 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":37.09024,"lon":-95.712891,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

74

Pumped Storage Hydropower (Detailed Analysis to Demonstrate Value)-Modeling and Analysis of Value of Advanced Pumped Storage Hydropower in the U.S.  

Energy.gov (U.S. Department of Energy (DOE))

Pumped Storage Hydropower (Detailed Analysis to Demonstrate Value)-Modeling and Analysis of Value of Advanced Pumped Storage Hydropower in the U.S.

75

Los Alamos County Completes Abiquiu Hydropower Project, Bringing New Clean  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Los Alamos County Completes Abiquiu Hydropower Project, Bringing Los Alamos County Completes Abiquiu Hydropower Project, Bringing New Clean Energy Resources to New Mexico Los Alamos County Completes Abiquiu Hydropower Project, Bringing New Clean Energy Resources to New Mexico April 21, 2011 - 12:00am Addthis WASHINGTON, D.C. - U.S. Energy Secretary Steven Chu issued the following statement on the completion and startup today of the Abiquiu Hydropower Project in New Mexico - the first hydropower project funded by the American Recovery and Reinvestment Act to be completed nationwide. "Today marks a major milestone in securing America's clean energy future as we celebrate the completion of the Department of Energy's first major Recovery Act-funded water power project. By increasing renewable energy output at existing hydropower facilities, we can create clean energy jobs,

76

Large-Scale Hydropower Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

77

Large-Scale Hydropower Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

78

Estimated impacts of climate warming on California’s high-elevation hydropower  

E-Print Network (OSTI)

on high elevation hydropower generation in California’sCalifornia’s high-elevation hydropower Kaveh Madani · Jay R.Abstract California’s hydropower system is composed of high

Madani, Kaveh; Lund, Jay R.

2010-01-01T23:59:59.000Z

79

Laser Seeding Yields High-Power Coherent Terahertz Radiation  

NLE Websites -- All DOE Office Websites (Extended Search)

Laser Seeding Yields High-Power Coherent Terahertz Radiation Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Wednesday, 25 April 2007 00:00 Researchers at...

80

Modeling Combustion Control for High Power Diesel Mode Switching  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and Emissions Research Conference 2010 Modeling Combustion Control for High Power Diesel Mode Switching P-20 Motivation * High power LTC-diesel mode operation * Transient...

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Modeling Combustion Control for High Power Diesel Mode Switching...  

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

Combustion Control for High Power Diesel Mode Switching Modeling Combustion Control for High Power Diesel Mode Switching Poster presentation given at the 16th Directions in...

82

Abuse Testing of High Power Batteries | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Testing of High Power Batteries Abuse Testing of High Power Batteries 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting,...

83

Energy Storage Testing and Analysis High Power and High Energy...  

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

Testing and Analysis High Power and High Energy Development Energy Storage Testing and Analysis High Power and High Energy Development 2009 DOE Hydrogen Program and Vehicle...

84

Measuring Tiny Waves with High Power Particle Beams | Princeton...  

NLE Websites -- All DOE Office Websites (Extended Search)

Measuring Tiny Waves with High Power Particle Beams American Fusion News Category: U.S. Universities Link: Measuring Tiny Waves with High Power Particle Beams...

85

A Cooled Deformable Bimorph Mirror for a High Power Laser  

Science Journals Connector (OSTI)

Adaptive optics (AO) has been applied in various fields including astronomy, ophthalmology and high power laser systems. An adaptive optics system for a high power laser is not...

Lee, Jun-Ho; Lee, Young-Cheol; Kang, Eung-Cheol

2006-01-01T23:59:59.000Z

86

CHALLENGES FACING HIGH POWER PROTON ACCELERATORS  

SciTech Connect

This presentation will provide an overview of the challenges of high power proton accelerators such as SNS, J-PARC, etc., and what we have learned from recent experiences. Beam loss mechanisms and methods to mitigate beam loss will also be discussed.

Plum, Michael A [ORNL

2013-01-01T23:59:59.000Z

87

Microsoft Word - FINAL 2013 Hydropower Meeting Agenda 060713  

NLE Websites -- All DOE Office Websites (Extended Search)

Board Oklahoma Comprehensive Water Plan Update Others SOUTHWESTERN FEDERAL HYDROPOWER MEETING The Earl Cabell Federal Building 1100 Commerce Street Red River Room Floor...

88

2014 Water Power Program Peer Review Compiled Presentations: Hydropower Technologies  

Energy.gov (U.S. Department of Energy (DOE))

This document contains the compiled hydropower technologies presentations from the U.S. Department of Energy 2014 Water Power Program Peer Review, held February 25-27, 2014.

89

Conventional Hydropower Technologies, Wind And Water Power Program...  

Office of Environmental Management (EM)

Power for a Clean Energy Future (Fact Sheet), Wind and Water Power Program (WWPP) Hydropower Projects Environmental Impacts of Increased Hydroelectric Development at Existing Dams...

90

New Stream-Reach Hydropower Development Fact Sheet | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for new hydropower development in U.S. stream-reaches that do not currently have hydroelectric facilities or other forms of infrastructure. New Stream-Reach Development...

91

Anfu Guanshan Hydropower Development Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Co.,Ltd Place: Jiangxi Province, China Zip: 343009 Sector: Hydro Product: China-based small hydro project developer. References: Anfu Guanshan Hydropower Development Co.,Ltd1...

92

Laboratory Demonstration of a New American Low-Head Hydropower...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory Demonstration of a New American Low-Head Hydropower Turbine 68bhydrogreensmallhydroch11.ppt More Documents & Publications Real World Demonstration of a New...

93

E-Print Network 3.0 - assessment hydropower evaluation Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

functional displays for hydropower systems: Model-based guidance of scenario design... Work Domain Analysis and Ecological Interface Design for Hydropower System Monitoring and...

94

Editorial: Time for green certification for all hydropower?  

SciTech Connect

While accrediting a large hydropower facility is intrinsically more complex and potentially controversial, it is time to review the progress made in understanding the environmental impacts of large hydropower and the development of environmentally friendly hydropower systems. Over the last two decades, many in-field, laboratory, and modeling technologies have been developed or improved to better understand the mechanisms of fish injury and mortality and to identify turbine design and operation alternatives to reduce such impacts. In 2010, representatives of DOE and the US Department of Interior, and USACE signed a memorandum of understanding to work more closely to develop sustainable hydropower. One of their major objectives is to increase hydropower generation using low-impact and environmentally sustainable approaches. Given the recent scientific and technological advances that have decreased the environmental impact of hydropower and the need to aggressively facilitate development of low impact hydropower, we think it is indeed time to initiate a science-based green certification program that includes rigorous criteria for environmental protection but does not exclude hydropower based on size only.

Deng, Zhiqun; Carlson, Thomas J.

2012-04-10T23:59:59.000Z

95

16 Projects To Advance Hydropower Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

16 Projects To Advance Hydropower Technology 16 Projects To Advance Hydropower Technology 16 Projects To Advance Hydropower Technology September 6, 2011 - 11:24am Addthis U.S. Department Energy Secretary Steven Chu and U.S. Department of the Interior Secretary Ken Salazar announced nearly $17 million in funding over the next three years for research and development projects to advance hydropower technology. The list of 16 projects in 11 different states can be found here. Applicant Location Award Amount; Funding is from DOE unless otherwise noted Description Sustainable Small Hydro (Topic Areas 1.1. and 1.2) Earth by Design Bend, OR $1,500,000 This project will develop and test a new low-head modular hydropower technology in a canal in Oregon's North Unit Irrigation District to produce cost-competitive electricity.

96

Property:PotentialHydropowerGeneration | Open Energy Information  

Open Energy Info (EERE)

PotentialHydropowerGeneration PotentialHydropowerGeneration Jump to: navigation, search Property Name PotentialHydropowerGeneration Property Type Quantity Description The estimated potential energy generation from Hydropower for a particular place. Use this type to express a quantity of energy. The default unit for energy on OpenEI is the Kilowatt hour (kWh), which is 3,600,000 Joules. http://en.wikipedia.org/wiki/Unit_of_energy It's possible types are Watt hours - 1000 Wh, Watt hour, Watthour Kilowatt hours - 1 kWh, Kilowatt hour, Kilowatthour Megawatt hours - 0.001 MWh, Megawatt hour, Megawatthour Gigawatt hours - 0.000001 GWh, Gigawatt hour, Gigawatthour Joules - 3600000 J, Joules, joules Pages using the property "PotentialHydropowerGeneration" Showing 25 pages using this property. (previous 25) (next 25)

97

Property:PotentialHydropowerSites | Open Energy Information  

Open Energy Info (EERE)

PotentialHydropowerSites PotentialHydropowerSites Jump to: navigation, search Property Name PotentialHydropowerSites Property Type Number Description The number of potential hydropower sites in a place. Pages using the property "PotentialHydropowerSites" Showing 25 pages using this property. (previous 25) (next 25) A Alabama + 2,435 + Alaska + 3,053 + Arizona + 1,958 + Arkansas + 3,268 + C California + 9,692 + Colorado + 5,060 + Connecticut + 659 + D Delaware + 25 + F Florida + 493 + G Georgia + 2,100 + H Hawaii + 437 + I Idaho + 6,706 + Illinois + 1,330 + Indiana + 1,142 + Iowa + 2,398 + K Kansas + 3,201 + Kentucky + 1,394 + L Louisiana + 934 + M Maine + 1,373 + Maryland + 491 + Massachusetts + 560 + Michigan + 1,942 + Minnesota + 1,391 + Mississippi + 1,536 + Missouri + 5,089 +

98

The Next Generation of Hydropower Engineers and Scientists | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Next Generation of Hydropower Engineers and Scientists The Next Generation of Hydropower Engineers and Scientists The Next Generation of Hydropower Engineers and Scientists August 11, 2011 - 12:31pm Addthis Hydro Research Foundation Fellows. | Image courtesy of the Hydro Research Foundation Fellowship Program. Hydro Research Foundation Fellows. | Image courtesy of the Hydro Research Foundation Fellowship Program. Mike Reed Water Power Program Manager, Water Power Program As the nation continues to rely on hydropower to help meet its energy needs, a new generation of engineers and scientists is finding ways to make hydropower technologies more efficient, environmentally friendly and cost effective. The Energy Department's Office of Energy Efficiency and Renewable Energy (EERE), in cooperation with the Hydro Research

99

Event:Hydropower Africa 2012 | Open Energy Information  

Open Energy Info (EERE)

2012 2012 Jump to: navigation, search Calendar.png Hydropower Africa 2012: on 2012/09/04 "Hydropower Africa 2012 is the largest hydropower event of its kind in Africa boasting over 450 visitors from across the globe. It looks at planned projects and tender prospects for hydropower development in Africa and innovative funding solutions for projects - big and small. Refurbishment and modernisation updates of major hydropower facilities as well as operation and maintenance best practices from across the continent will be presented and discussed. Infrastructure development and African-appropriate engineering solutions to provide power to villages, rural areas and urban communities and achieving operational objectives while addressing environment and social challenges will be examined through

100

U.S. hydropower resource assessment for Ohio  

SciTech Connect

The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Ohio.

Conner, A.M.; Francfort, J.E.

1997-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

U.S. hydropower resource assessment for North Carolina  

SciTech Connect

The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of North Carolina.

Conner, A.M.; Francfort, J.E.

1997-10-01T23:59:59.000Z

102

U.S. hydropower resource assessment for Idaho  

SciTech Connect

The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering and Environmental Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Idaho.

Conner, A.M.; Francfort, J.E.

1998-08-01T23:59:59.000Z

103

U.S. hydropower resource assessment for Nevada  

SciTech Connect

The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Nevada.

Conner, A.M.; Francfort, J.E.

1997-10-01T23:59:59.000Z

104

16 Projects To Advance Hydropower Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Projects To Advance Hydropower Technology Projects To Advance Hydropower Technology 16 Projects To Advance Hydropower Technology September 6, 2011 - 11:24am Addthis U.S. Department Energy Secretary Steven Chu and U.S. Department of the Interior Secretary Ken Salazar announced nearly $17 million in funding over the next three years for research and development projects to advance hydropower technology. The list of 16 projects in 11 different states can be found here. Applicant Location Award Amount; Funding is from DOE unless otherwise noted Description Sustainable Small Hydro (Topic Areas 1.1. and 1.2) Earth by Design Bend, OR $1,500,000 This project will develop and test a new low-head modular hydropower technology in a canal in Oregon's North Unit Irrigation District to produce cost-competitive electricity.

105

6.15 - Pumped Storage Hydropower Developments  

Science Journals Connector (OSTI)

Abstract This chapter details how pumped storage hydroelectric projects differ from conventional hydroelectric projects. The concept of electrical energy storage has become a controversial issue in recent years. Many questions are raised in the electricity sector: Why is energy storage needed? What are the alternatives? One of the answers is pumped storage hydropower plants, using mainly pump–turbines. In this chapter, details of some remarkable examples of pumped storage power plants are given: Okinawa Seawater in Japan, Goldisthal in Germany, Tianhuangping in China, and Coo-Trois Ponts in Belgium.

T. Hino; A. Lejeune

2012-01-01T23:59:59.000Z

106

GHG Emissions from Hydropower Reservoirs The role of hydropower reservoirs in contributing to greenhouse gas (GHG) emissions is poorly  

E-Print Network (OSTI)

GHG Emissions from Hydropower Reservoirs The role of hydropower reservoirs in contributing to greenhouse gas (GHG) emissions is poorly understood, but recent studies have indicated that GHG emissions; and over 5 weeks in August--September, the peak GHG emission period, during 2012. (Pacific Northwest

107

Hydropower Advancement Project (HAP): Audits and Feasibility Studies for Capacity and Efficiency Upgrades  

Energy.gov (U.S. Department of Energy (DOE))

Hydropower Advancement Project (HAP): Audits and Feasibility Studies for Capacity and Efficiency Upgrades

108

Low Head/Low Power Hydropower Resource Assessment of the Pacific Northwest Hydrologic Region  

E-Print Network (OSTI)

three classes of hydropower technologies: conventional turbines, unconventional systems, and microhydro

Power Hydropower; Douglas G. Hall; Gregory R. Carroll; Shane J. Cherry; Y D. Lee; Garold L. Sommers

2002-01-01T23:59:59.000Z

109

Federal Memorandum of Understanding for Hydropower/Participating Agencies |  

Open Energy Info (EERE)

Participating Agencies Participating Agencies < Federal Memorandum of Understanding for Hydropower Jump to: navigation, search Federal Memorandum of Understanding for Hydropower Hydroelectric-collage2.jpg Home Federal Inland Hydropower Working Group Participating Agencies Resources Bonneville Power Administration: caption:Bonneville Power Administration Bonneville Power Administration Factsheet Bonneville Power Administration Publications Conservation Resource Energy Data - The Red Book Bureau of Indian Affairs: caption:Bureau of Indian Affairs Bureau of Indian Affairs Factsheet Tribal Energy and Environmental Clearinghouse (TEEIC) Office of Indian Energy and Economic Development (IEED) Division of Irrigation, Power and Safety of Dams Bureau of Reclamation: caption:Bureau of Reclamation Factsheet

110

Abuse Testing of High Power Batteries | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Abuse Testing of High Power Batteries Abuse Testing of High Power Batteries Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25,...

111

Abuse Testing of High Power Batteries | Department of Energy  

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

roth.pdf More Documents & Publications Abuse Tolerance Improvement Abuse Testing of High Power Batteries USABC Program Highlights...

112

Feedthrough terminal for high-power cell  

DOE Patents (OSTI)

A feedthrough terminal for a high power electrochemical storage cell providing low resistance coupling to the conductive elements therein while isolating the terminal electrode from the highly corrosive environment within the cell is disclosed. A large diameter, cylindrical copper electrode is enclosed in a stainless steel tube with a BN powder feedthrough seal maintained around the stainless steel tube by means of facing insulative bushings and an outer sleeve. One end of the copper conductor is silver-brazed directly to a flat, butterfly bus bar within the cell, with the adjacent end of the surrounding outer feedthrough sleeve welded to the bus bar. A threaded seal is fixedly positioned on a distal portion of the stainless steel tube immediately adjacent the distal insulative bushing so as to compress the feedthrough seal in tight fitting relation around the stainless steel tube in providing a rugged, leak-proof electrical feedthrough terminal for the power cell.

Kaun, T.D.

1982-05-28T23:59:59.000Z

113

Solar Energy and Small Hydropower Tax Credit (Personal) | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Energy and Small Hydropower Tax Credit (Personal) Solar Energy and Small Hydropower Tax Credit (Personal) Solar Energy and Small Hydropower Tax Credit (Personal) < Back Eligibility Commercial Residential Savings Category Home Weatherization Commercial Weatherization Solar Lighting Windows, Doors, & Skylights Buying & Making Electricity Water Heating & Cooling Commercial Heating & Cooling Heating Water Heating Maximum Rebate In any given tax year, $3,500, or 50% of taxpayer's tax liability for that taxable year, whichever is less Program Info Start Date 1/1/2006 State South Carolina Program Type Personal Tax Credit Rebate Amount 25% of eligible costs Provider South Carolina Department of Revenue In South Carolina, taxpayers may claim a credit of 25% of the costs of purchasing and installing a solar energy system or small hydropower system

114

Property:PotentialHydropowerCapacity | Open Energy Information  

Open Energy Info (EERE)

PotentialHydropowerCapacity PotentialHydropowerCapacity Jump to: navigation, search Property Name PotentialHydropowerCapacity Property Type Quantity Description The nameplate capacity technical potential from Hydropower for a particular place. Use this property to express potential electric energy generation, such as Nameplate Capacity. The default unit is megawatts (MW). For spatial capacity, use property Volume. Acceptable units (and their conversions) are: 1 MW,MWe,megawatt,Megawatt,MegaWatt,MEGAWATT,megawatts,Megawatt,MegaWatts,MEGAWATT,MEGAWATTS 1000 kW,kWe,KW,kilowatt,KiloWatt,KILOWATT,kilowatts,KiloWatts,KILOWATT,KILOWATTS 1000000 W,We,watt,watts,Watt,Watts,WATT,WATTS 1000000000 mW,milliwatt,milliwatts,MILLIWATT,MILLIWATTS 0.001 GW,gigawatt,gigawatts,Gigawatt,Gigawatts,GigaWatt,GigaWatts,GIGAWATT,GIGAWATTS

115

A Boost for Hydropower (and the Economy) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Boost for Hydropower (and the Economy) A Boost for Hydropower (and the Economy) A Boost for Hydropower (and the Economy) September 20, 2010 - 5:29pm Addthis The 91-year old Cheoah Dam in Robbinsville, North Carolina. The 91-year old Cheoah Dam in Robbinsville, North Carolina. Jacques Beaudry-Losique Director, Wind & Water Program There are approximately 2,400 hydropower dams in the U.S., many of which have not undergone a significant upgrade in decades. These older dams present a great opportunity to expand clean energy across the country, allowing us to rapidly increase generation capacity through the installation of new high-efficiency equipment. I recently got a firsthand look at one such effort when I helped kick off a project to modernize the 91-year old Cheoah Dam in Robbinsville, North

116

Solar Energy and Small Hydropower Tax Credit (Corporate) | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Energy and Small Hydropower Tax Credit (Corporate) Solar Energy and Small Hydropower Tax Credit (Corporate) Solar Energy and Small Hydropower Tax Credit (Corporate) < Back Eligibility Commercial Residential Savings Category Home Weatherization Commercial Weatherization Solar Lighting Windows, Doors, & Skylights Buying & Making Electricity Water Heating & Cooling Commercial Heating & Cooling Heating Water Heating Maximum Rebate In any given tax year, $3,500, or 50% of taxpayer's tax liability for that taxable year, whichever is less Program Info Start Date 1/1/2006 State South Carolina Program Type Corporate Tax Credit Rebate Amount 25% of eligible costs Provider South Carolina Department of Revenue In South Carolina, taxpayers may claim a credit of 25% of the costs of purchasing and installing a solar energy system or small hydropower system

117

New Hydropower Turbines to Save Snake River Steelhead | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydropower Turbines to Save Snake River Steelhead Hydropower Turbines to Save Snake River Steelhead New Hydropower Turbines to Save Snake River Steelhead May 24, 2010 - 1:23pm Addthis Voith Hydro installed machines at the Bonneville Dam on the Columbia River, located about 40 miles east of Portland, Ore., that are meant to save more fish. The next-generation machines at Ice Harbor will be even more advanced. | Photo Courtesy of Voith Hydro Voith Hydro installed machines at the Bonneville Dam on the Columbia River, located about 40 miles east of Portland, Ore., that are meant to save more fish. The next-generation machines at Ice Harbor will be even more advanced. | Photo Courtesy of Voith Hydro Joshua DeLung Hydropower harnesses water power to create reliable, clean and plentiful renewable energy, but dams can have an unintended impact on wildlife --

118

Climate change impacts on financial risk in hydropower projects   

E-Print Network (OSTI)

the financial viability of existing and potential hydro schemes. Previous work developed a methodology for quantifying the potential impact of climate change on the economics of hydropower schemes. Here, the analysis is extended to examine the potential...

Harrison, Gareth P; Whittington, Bert; Wallace, Robin

119

NREL: Energy Analysis - Hydropower Results - Life Cycle Assessment...  

NLE Websites -- All DOE Office Websites (Extended Search)

of the systematic review and analysis. The majority of life cycle greenhouse gas (GHG) emission estimates for hydropower cluster between about 4 and 14 g CO2eqkWh. The...

120

Small Businesses Key in Hydropower Tech Advancement | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Businesses Key in Hydropower Tech Advancement Businesses Key in Hydropower Tech Advancement Small Businesses Key in Hydropower Tech Advancement September 6, 2011 - 2:59pm Addthis Earlier today, the Department of Energy and the Department of Interior announced nearly $17 million in funding over the next three years to advance hydropower technology. The funding announced today will go to sixteen innovative projects around the country, including sustainable small hydro projects, like the ones from Hydro Green Energy, a small business that handles hydroelectric power generation and power and communication line construction. The company, which has eight employees currently, has been awarded funding for two projects. Near Space Systems, a Colorado Springs-based company, is a service-disabled veteran-owned business with a manufacturing focus that's

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

A New Vision for United States Hydropower | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Vision has not only breadth, but depth in its approach to the future of this vital renewable energy industry. To aid in this process, Hydropower Vision Task Forces are being...

122

Downstream Fish Passage through Hydropower One of the most widespread environmental constraints to the development of hydropower in the U.S.  

E-Print Network (OSTI)

Downstream Fish Passage through Hydropower Turbines Background One of the most widespread environmental constraints to the development of hydropower in the U.S. is the provision of adequate fish passage at projects. Mortality of downstream migrating fish, particularly as a result of passing through hydropower

123

Memorandum of Understanding for Hydropower Two Year Progress Report  

Energy.gov (U.S. Department of Energy (DOE))

On March 24, 2010, the Department of the Army (DOA) through the U.S. Army Corps of Engineers (USACE or Corps), the Department of Energy, and the Department of the Interior signed the Memorandum of Understanding (MOU) for Hydropower. The purpose of the MOU is to “help meet the nation’s needs for reliable, affordable, and environmentally sustainable hydropower by building a long

124

High power linear pulsed beam annealer  

DOE Patents (OSTI)

A high power pulsed electron beam is produced in a system comprised of an electron gun having a heated cathode, control grid, focus ring, and a curved drift tube. The drift tube is maintained at a high positive voltage with respect to the cathode to accelerate electrons passing through the focus ring and to thereby eliminate space charge. A coil surrounding the curved drift tube provides a magnetic field which maintains the electron beam focused about the axis of the tube and imparts motion on electrons in a spiral path for shallow penetration of the electrons into a target. The curvature of the tube is selected so there is no line of sight between the cathode and a target holder positioned within a second drift tube spaced coaxially from the curved tube. The second tube and the target holder are maintained at a reference voltage that decelerates the electrons. A second coil surrounding the second drift tube maintains the electron beam focused about the axis of the second drift tube and compresses the electron beam to the area of the target. The target holder can be adjusted to position the target where the cross section of the beam matches the area of the target.

Strathman, Michael D. (Concord, CA); Sadana, Devendra K. (Berkeley, CA); True, Richard B. (Sunnyvale, CA)

1983-01-01T23:59:59.000Z

125

Conventional Hydropower Technologies (Fact Sheet), Wind And Water Power Program (WWPP)  

NLE Websites -- All DOE Office Websites (Extended Search)

Water Power Water Power Program supports the development of technologies that harness the nation's renewable hydropower resources to generate environmentally sustainable and cost-effective electricity. Most conventional hydropower plants use a diver- sion structure, such as a dam, to capture water's potential energy via a turbine for electricity generation. The program's conventional hydropower activities focus on increasing generating capacity and efficiency at existing hydroelectric facilities, adding hydroelectric generating capacity to exist- ing non-powered dams, adding new low impact hydropower, increasing advanced pumped-storage hydropower capacity, and reducing potential environmental impacts of conven- tional hydropower production. The program's research and

126

Real World Demonstration of a New American Low-Head Hydropower...  

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

Real World Demonstration of a New American Low-Head Hydropower Unit Real World Demonstration of a New American Low-Head Hydropower Unit Real World Demonstration of a New American...

127

Laser Seeding Yields High-Power Coherent Terahertz Radiation  

NLE Websites -- All DOE Office Websites (Extended Search)

Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Researchers at Berkeley Lab have been exploring the ways coherent synchrotron radiation (CSR) is generated in...

128

High power fiber delivery for laser ignition applications  

Science Journals Connector (OSTI)

The present contribution provides a concise review of high power fiber delivery research for laser ignition applications. The fiber delivery requirements are discussed in terms of exit...

Yalin, Azer P

2013-01-01T23:59:59.000Z

129

Design and Control of High Power Density Motor Drive.  

E-Print Network (OSTI)

??This dissertation aims at developing techniques to achieve high power density in motor drives under the performance requirements for transportation system. Four main factors influencing… (more)

Jiang, Dong

2011-01-01T23:59:59.000Z

130

DOE: Quantifying the Value of Hydropower in the Electric Grid  

SciTech Connect

The report summarizes research to Quantify the Value of Hydropower in the Electric Grid. This 3-year DOE study focused on defining value of hydropower assets in a changing electric grid. Methods are described for valuation and planning of pumped storage and conventional hydropower. The project team conducted plant case studies, electric system modeling, market analysis, cost data gathering, and evaluations of operating strategies and constraints. Five other reports detailing these research results are available a project website, www.epri.com/hydrogrid. With increasing deployment of wind and solar renewable generation, many owners, operators, and developers of hydropower have recognized the opportunity to provide more flexibility and ancillary services to the electric grid. To quantify value of services, this study focused on the Western Electric Coordinating Council region. A security-constrained, unit commitment and economic dispatch model was used to quantify the role of hydropower for several future energy scenarios up to 2020. This hourly production simulation considered transmission requirements to deliver energy, including future expansion plans. Both energy and ancillary service values were considered. Addressing specifically the quantification of pumped storage value, no single value stream dominated predicted plant contributions in various energy futures. Modeling confirmed that service value depends greatly on location and on competition with other available grid support resources. In this summary, ten different value streams related to hydropower are described. These fell into three categories; operational improvements, new technologies, and electricity market opportunities. Of these ten, the study was able to quantify a monetary value in six by applying both present day and future scenarios for operating the electric grid. This study confirmed that hydropower resources across the United States contribute significantly to operation of the grid in terms of energy, capacity, and ancillary services. Many potential improvements to existing hydropower plants were found to be cost-effective. Pumped storage is the most likely form of large new hydro asset expansions in the U.S. however, justifying investments in new pumped storage plants remains very challenging with current electricity market economics. Even over a wide range of possible energy futures, up to 2020, no energy future was found to bring quantifiable revenues sufficient to cover estimated costs of plant construction. Value streams not quantified in this study may provide a different cost-benefit balance and an economic tipping point for hydro. Future studies are essential in the quest to quantify the full potential value. Additional research should consider the value of services provided by advanced storage hydropower and pumped storage at smaller time steps for integration of variable renewable resources, and should include all possible value streams such as capacity value and portfolio benefits i.e.; reducing cycling on traditional generation.

None

2012-12-31T23:59:59.000Z

131

The JLab high power ERL light source  

SciTech Connect

A new THz/IR/UV photon source at Jefferson Lab is the first of a new generation of light sources based on an Energy-Recovered, (superconducting) Linac (ERL). The machine has a 160 MeV electron beam and an average current of 10 mA in 75 MHz repetition rate hundred femtosecond bunches. These electron bunches pass through a magnetic chicane and therefore emit synchrotron radiation. For wavelengths longer than the electron bunch the electrons radiate coherently a broadband THz {approx} half cycle pulse whose average brightness is > 5 orders of magnitude higher than synchrotron IR sources. Previous measurements showed 20 W of average power extracted[1]. The new facility offers simultaneous synchrotron light from the visible through the FIR along with broadband THz production of 100 fs pulses with >200 W of average power. The FELs also provide record-breaking laser power [2]: up to 10 kW of average power in the IR from 1 to 14 microns in 400 fs pulses at up to 74.85 MHz repetition rates and soon will produce similar pulses of 300-1000 nm light at up to 3 kW of average power from the UV FEL. These ultrashort pulses are ideal for maximizing the interaction with material surfaces. The optical beams are Gaussian with nearly perfect beam quality. See www.jlab.org/FEL for details of the operating characteristics; a wide variety of pulse train configurations are feasible from 10 microseconds long at high repetition rates to continuous operation. The THz and IR system has been commissioned. The UV system is to follow in 2005. The light is transported to user laboratories for basic and applied research. Additional lasers synchronized to the FEL are also available. Past activities have included production of carbon nanotubes, studies of vibrational relaxation of interstitial hydrogen in silicon, pulsed laser deposition and ablation, nitriding of metals, and energy flow in proteins. This paper will present the status of the system and discuss some of the discoveries we have made concerning the physics performance, design optimization, and operational limitations of such a first generation high power ERL light source.

G.R. Neil; C. Behre; S.V. Benson; M. Bevins; G. Biallas; J. Boyce; J. Coleman; L.A. Dillon-Townes; D. Douglas; H.F. Dylla; R. Evans; A. Grippo; D. Gruber; J. Gubeli; D. Hardy; C. Hernandez-Garcia; K. Jordan; M.J. Kelley; L. Merminga; J. Mammosser; W. Moore; N. Nishimori; E. Pozdeyev; J. Preble; R. Rimmer; Michelle D. Shinn; T. Siggins; C. Tennant; R. Walker; G.P. Williams and S. Zhang

2005-03-19T23:59:59.000Z

132

Advanced cathode material for high power applications.  

SciTech Connect

In our efforts to develop low cost high-power Li-ion batteries with excellent safety, as well as long cycle and calendar life, lithium manganese oxide spinel and layered lithium nickel cobalt manganese oxide cathode materials were investigated. Our studies with the graphite/LiPF{sub 6}/spinel cells indicated a very significant degradation of capacity with cycling at 55 C. This degradation was caused by the reduction of manganese ions on the graphite surface which resulted in a significant increase of the charge-transfer impedance at the anode/electrolyte interface. To improve the stability of the spinel, we investigated an alternative salt that would not generate HF acid that may attack the spinel. The alternative salt we selected for this work was lithium bisoxalatoborate, LiB(C{sub 2}O{sub 4}){sub 2} ('LiBoB'). In this case, the graphite/LiBoB/spinel Li-ion cells exhibited much improved cycle/calendar life at 55 C and better abuse tolerance, as well as excellent power. A second system based on LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} layered material was also investigated and its performance was compared to commercial LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2}. Cells based on LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} showed lower power fade and better thermal safety than the LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2}-based commercial cells under similar test conditions. Li-ion cells based on the material with excess lithium (Li{sub 1.1}Ni{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}) exhibited excellent power performance that exceeded the FreedomCAR requirements.

Amine, K.; Belharouak, I.; Kang, S. H.; Liu, J.; Vissers, D.; Henriksen, G.; Chemical Engineering

2005-01-01T23:59:59.000Z

133

Quantifying the Value of Hydropower in the Electric Grid: Final Report  

Energy.gov (U.S. Department of Energy (DOE))

This report summarizes a 3-year DOE study focused on defining value of hydropower assets in a changing electric grid. The study looked at existing large hydropower operations in the U.S., models for different electricity futures, markets, costs of existing and new technologies as well as trends related to hydropower investments in other parts of the world.

134

Analysing Climate Change Risk in Hydropower Development By Gareth P. Harrison and Bert W. Whittington,  

E-Print Network (OSTI)

1 Analysing Climate Change Risk in Hydropower Development By Gareth P. Harrison and Bert W ABSTRACT The continuing and increased use of hydropower is a key part of the strategy to limit the extent a methodology for quantifying the potential impact of climate change on the financial performance of hydropower

Harrison, Gareth

135

How Run-of-River Operation Affects Hydropower Generation Henriette I. Jager Mark S. Bevelhimer  

E-Print Network (OSTI)

How Run-of-River Operation Affects Hydropower Generation and Value Henriette I. Jager Ã? Mark S) are mandated to protect aquatic biota, (2) decrease hydropower generation per unit flow, and (3) decrease energy revenue. We tested these three assump- tions by reviewing hydropower projects with license

Jager, Henriette I.

136

Modeling Multi-Reservoir Hydropower Systems in the Sierra Nevada with Environmental Requirements and Climate Warming  

E-Print Network (OSTI)

i Modeling Multi-Reservoir Hydropower Systems in the Sierra Nevada with Environmental Requirements and the Sierra Nevada, their majestic backyard. #12;iii Abstract Hydropower systems and other river regulation that ecosystems have historically depended on. These effects are compounded at regional scales. As hydropower

Lund, Jay R.

137

SUMMARY OF HYDROPOWER COSTS APPENDIX B FISH AND WILDLIFE PROGRAM B-1 December 15, 1994  

E-Print Network (OSTI)

SUMMARY OF HYDROPOWER COSTS APPENDIX B FISH AND WILDLIFE PROGRAM B-1 December 15, 1994 Appendix B SUMMARY OF HYDROPOWER COSTS AND IMPACTS OF THE MAINSTEM PASSAGE ACTIONS This document summarizes regional hydropower costs and impacts of the mainstem passage actions in the Northwest Power Planning Council's 1994

138

HYDROPOWER RESERVOIR FOR FLOOD CONTROL: A CASE STUDY ON RINGLET RESERVOIR, CAMERON  

E-Print Network (OSTI)

HYDROPOWER RESERVOIR FOR FLOOD CONTROL: A CASE STUDY ON RINGLET RESERVOIR, CAMERON HIGHLANDS, Malaysia 4 Professor, Department of Civil Engineering, Colorado State University, USA ABSTRACT: Hydropower as possible for daily hydropower generation as well as to prevent any spillage at dam. However

Julien, Pierre Y.

139

Climate Change Effects on High-Elevation Hydropower System in KAVEH MADANI LARIJANI  

E-Print Network (OSTI)

i Climate Change Effects on High-Elevation Hydropower System in California By KAVEH MADANI LARIJANI ___________________________________________ Committee in Charge 2009 #12;ii Abstract The high-elevation hydropower system in California, composed of more than 150 hydropower plants and regulated by the Federal Energy Regulatory Commission (FERC

Lund, Jay R.

140

Upper Middle Mainstem Columbia River Subbasin Water Quality Parameters Affected by Hydropower Production  

E-Print Network (OSTI)

by Hydropower Production Total Dissolved Gas Total dissolved gas (TDG) supersaturation often occurs during periods of high runoff and spill at hydropower projects and can be harmful to fish. Supersaturation occurs of hydropower projects on Columbia River water temperature has been to delay the time when thermal maximums

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

SUSTAINABLE RESERVOIR OPERATION: CAN WE GENERATE HYDROPOWER AND PRESERVE ECOSYSTEM VALUES?y  

E-Print Network (OSTI)

SUSTAINABLE RESERVOIR OPERATION: CAN WE GENERATE HYDROPOWER AND PRESERVE ECOSYSTEM VALUES hydropower are typically operated with the goal of maximizing energy revenue, while meeting other legal water approaches. The first approach seeks flow regimes that maximize hydropower generation, while satisfying legal

Jager, Henriette I.

142

Solar, Wind, Hydropower: Home Renewable Energy Installations | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar, Wind, Hydropower: Home Renewable Energy Installations Solar, Wind, Hydropower: Home Renewable Energy Installations Solar, Wind, Hydropower: Home Renewable Energy Installations April 17, 2013 - 1:44pm Addthis This Lakewood, Colorado home was built in 1956. Brent and Mo Nelson upgraded the home with multiple solar technologies including; daylighting, passive solar and active solar. They also have an 80 gallon solar hot water heater. | Photo by Dennis Schroeder, National Renewable Energy Laboratory. This Lakewood, Colorado home was built in 1956. Brent and Mo Nelson upgraded the home with multiple solar technologies including; daylighting, passive solar and active solar. They also have an 80 gallon solar hot water heater. | Photo by Dennis Schroeder, National Renewable Energy Laboratory. Homeowner Andrea Mitchel, with installer Joe Guasti, proudly shows off small wind turbine installed in Oak Hills, CA. | Photo by Karin Sinclair, National Renewable Energy Laboratory.

143

EA-1933: Yakama Nation Drop 4 Hydropower Project, Yakama Nation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

933: Yakama Nation Drop 4 Hydropower Project, Yakama Nation 933: Yakama Nation Drop 4 Hydropower Project, Yakama Nation Reservation, WA EA-1933: Yakama Nation Drop 4 Hydropower Project, Yakama Nation Reservation, WA SUMMARY DOE is a cooperating agency with the Department of the Interior's Bureau of Indian Affairs as a lead agency for the preparation of an EA to evaluate the potential environmental impacts of a proposal by the Confederated Tribes and Bands of the Yakama Nation Department of Natural Resources to install an inline turbine on the Wapato Irrigation Project (WIP) Main Canal to generate approximately one megawatt of supplemental hydroelectric power. The Main Canal is a non-fish bearing irrigation canal within the WIP water conveyance system. The project site is located two miles southwest of Harrah, Washington.

144

Aleo Manali Hydropower Pvt Ltd | Open Energy Information  

Open Energy Info (EERE)

Manali Hydropower Pvt Ltd Manali Hydropower Pvt Ltd Jump to: navigation, search Name Aleo Manali Hydropower Pvt Ltd Place Kullu, Himachal Pradesh, India Zip 203001 Sector Hydro Product Himachal-based small hydro project developer. Coordinates 23.42796°, 84.91112° 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":23.42796,"lon":84.91112,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

145

2nd High-Power Targetry Workshop MATERIAL IRRADIATION STUDIES  

E-Print Network (OSTI)

2nd High-Power Targetry Workshop MATERIAL IRRADIATION STUDIES FOR HIGH-INTENSITY PROTON BEAM thing: 4 MW on what spot size? #12;2nd High-Power Targetry Workshop Is there hope? Several "smart" materials or new composites may be able to meet some of the desired requirements: - new graphite grades

McDonald, Kirk

146

OPERATIONAL ASPECTS OF HIGH POWER ENERGY RECOVERY LINACS  

SciTech Connect

We have been operating a high-power energy-recovery linac (ERL) at Jefferson Lab for several years. In the process we have learned quite a bit about both technical and physics limitations in high power ERLs. Several groups are now considering new ERLs that greatly increase either the energy, the current or both. We will present some of our findings on what to consider when designing, building, and operating a high power ERL. Our remarks for this paper are limited to lattice design and setup, magnets, vacuum chamber design, diagnostics, and beam stability.

Stephen Benson; David Douglas; Pavel Evtushenko; Kevin Jordan; George Neil; Paul Powers

2006-08-21T23:59:59.000Z

147

Effects of Climate Change on Federal Hydropower (Report to Congress)  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy (DOE), in consultation with the federal Power Marketing Administrations (PMAs) and other federal agencies, including federal dam owners, has prepared a comprehensive assessment examining the effects of climate change on water available for hydropower at federal facilities and on the marketing of power from these federal facilities

148

Modeling California's high-elevation hydropower systems in energy units  

E-Print Network (OSTI)

it a valuable renewable energy source. In the mid-1990s, hydropower was about 19% of world's total electricity Development Project, 2007] and almost 75% of the nation's electricity from all renew- able sources [Energy and Oregon, with approximately 27% in Washington (Energy Information Administration, Energy kid's page, 6

Pasternack, Gregory B.

149

High-power LED Technology and Solid State Lighting  

Science Journals Connector (OSTI)

The rapid adoption of LEDs in general illumination is fueled by high-power phosphor-conversion and direct color blue and red LED technology. Over the last several years...

Goetz, Werner

150

High power laser workover and completion tools and systems  

DOE Patents (OSTI)

Workover and completion systems, devices and methods for utilizing 10 kW or more laser energy transmitted deep into the earth with the suppression of associated nonlinear phenomena. Systems and devices for the laser workover and completion of a borehole in the earth. These systems and devices can deliver high power laser energy down a deep borehole, while maintaining the high power to perform laser workover and completion operations in such boreholes deep within the earth.

Zediker, Mark S; Rinzler, Charles C; Faircloth, Brian O; Koblick, Yeshaya; Moxley, Joel F

2014-10-28T23:59:59.000Z

151

Apparatus for advancing a wellbore using high power laser energy  

DOE Patents (OSTI)

Delivering high power laser energy to form a borehole deep into the earth using laser energy. Down hole laser tools, laser systems and laser delivery techniques for advancement, workover and completion activities. A laser bottom hole assembly (LBHA) for the delivery of high power laser energy to the surfaces of a borehole, which assembly may have laser optics, a fluid path for debris removal and a mechanical means to remove earth.

Zediker, Mark S.; Land, Mark S.; Rinzler, Charles C.; Faircloth, Brian O.; Koblick, Yeshaya; Moxley, Joel F.

2014-09-02T23:59:59.000Z

152

Hydropower Potential in the Western U.S. | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydropower Potential in the Western U.S. Hydropower Potential in the Western U.S. Energy Data Apps Maps Challenges Resources Blogs Let's Talk Energy Beta You are here Data.gov » Communities » Energy » Data Hydropower Potential in the Western U.S. Dataset Summary Description The dataset includes design elements, installed capacity, production capability, associated costs and cost -to-benefit ratios for nearly 200 water storing and conveying structures currently maintained by the Bureau of Reclamation. These data were used to support the internal study and report for assessing hydropower capability at 70 of Reclamation's existing facilities where hydropower has not been developed. The dataset can further be leveraged to support applications designed to provide a better understanding of our hydropower production potential and resource utilization.

153

Review of Pump as Turbine (PAT) for Micro-Hydropower  

E-Print Network (OSTI)

Abstract — Micro-hydropower projects are the excellent alternative for electricity generation in remote areas. These projects can be installed on small streams, rivers, and channels without any recognizable effect on environment. The only problem in micro-hydro projects is the high cost of turbine, for which Pump as Turbine (PAT) is a successful solution. An objective of the present study is to review the selection criteria of PAT for various hydropower sites having different potential. Since no general model has been developed which can be used to calculate the conversion factors for PAT, so this paper focuses on the research that have been carried out in this field. The limitations of the various available models and other selection criteria have also been discussed in this paper.

Tarang Agarwal

154

High Power Electrodynamics (HPE): Accelerator Operations and Technology,  

NLE Websites -- All DOE Office Websites (Extended Search)

CONTACTS CONTACTS Group Leader Bruce Carlsten Deputy Group Leader Ellen Guenette Administrator Josephine (Jo) Torres High-Power Electrodynamics (HPE) The High-Power Electrodynamics (AOT-HPE) Group applies accelerator and beam technologies to national-security-directed energy missions. AOT-HPE has three programmatic thrusts: free-electron lasers (FELs), high-power microwaves (HPM), and compact radiography. To maintain a vigorous and robust technical base for addressing DOE and DoD needs, the group's project portfolio is balanced between exploratory research, infrastructure development, and programmatic deliverables for sponsors. Funding is roughly 25% from the Lab's Directed Research and Development Program, 65% from DoD, and 10% from DOE. Technology Focus Areas AOT-HPE is the Laboratory's main vehicle for applying accelerator-based technologies to directed-energy mission needs. The group recognizes that many directed-energy missions are enabled by compact high-brightness electron accelerators and mm-wave and THz technologies.

155

Conventional Hydropower Technologies, Wind And Water Power Program (WWPP) (Fact Sheet)  

Energy.gov (U.S. Department of Energy (DOE))

The US Department of Energy conducts research on conventional hydropower technologies to increase generation and improve existing means of generating hydroelectricity.

156

Characteristics of the design of the hydropower equipment of the purnari-II hydroelectric station  

Science Journals Connector (OSTI)

1. The experience of design works on the hydropower equipment of a hydrostation as large of a large number of su...

V. A. Linyuchev

1998-03-01T23:59:59.000Z

157

Energy Department Announces $4.4 Million to Support Next-Generation Advanced Hydropower Manufacturing  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced $4.4 million to support the application of advanced materials and manufacturing techniques to the development of next-generation hydropower technologies.

158

Ultra high vacuum broad band high power microwave window  

DOE Patents (OSTI)

An improved high vacuum microwave window has been developed that utilizes high density polyethylene coated on two sides with SiOx, SiNx, or a combination of the two. The resultant low dielectric and low loss tangent window creates a low outgassing, low permeation seal through which broad band, high power microwave energy may be passed. No matching device is necessary and the sealing technique is simple. The features of the window are broad band transmission, ultra-high vacuum compatibility with a simple sealing technique, low voltage standing wave ratio, high power transmission and low cost.

Nguyen-Tuong, Viet (Seaford, VA); Dylla, III, Henry Frederick (Yorktown, VA)

1997-01-01T23:59:59.000Z

159

Ultra high vacuum broad band high power microwave window  

DOE Patents (OSTI)

An improved high vacuum microwave window has been developed that utilizes high density polyethylene coated on two sides with SiOx, SiNx, or a combination of the two. The resultant low dielectric and low loss tangent window creates a low outgassing, low permeation seal through which broad band, high power microwave energy may be passed. No matching device is necessary and the sealing technique is simple. The features of the window are broad band transmission, ultra-high vacuum compatibility with a simple sealing technique, low voltage standing wave ratio, high power transmission and low cost. 5 figs.

Nguyen-Tuong, V.; Dylla, H.F. III

1997-11-04T23:59:59.000Z

160

High-Power Electrochemical Storage Devices and Plug-in Hybrid...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EV) 3 CPI-LG Chem Mixed Mn-Oxide Cathodes (High Power) 4 JCS (Johnson Controls - Saft) Mixed Metal-Oxide Cathodes (High Power) 5 EnerDel Li-Titanate Anodes (High Power) PHEV...

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Using a Balun Transformer Combiner for High Power Microwave Experiments  

SciTech Connect

A novel coaxial power combiner design has been duplicated that has distinct advantages over other combiner geometries that can handle high power. This design is being applied to combine four 3 kW power supplies to obtain a 10 kW, 5 MHz system for an ICRF antenna on HSX. In the past, Wilkinson type combiners have had limited application to high power systems because of the lack of non-inductive, high power, 100 Omega balance loads. With this new design, standard 50 Omega dummy loads can be used instead for the balance load. The cost is considerably lower than lumped element combiner designs which are dominated by capacitor costs. At such a relatively low frequency, a 3-dB quarter-wave coupled-line coupler becomes impractically long, and a conventional branch-line hybrid requires 35 Omega-line, which is commercially unavailable. The balun combiner uses less transmission line than a ring hybrid and has good bandwidth characteristics even away from its best line impedance. Theoretical calculations and modeling were performed for line impedances from 65 Omega to 75 Omega. Measurements from a low-power test device show excellent agreement with theory, and construction of the high power system is underway.

Kaufman, Michael C [ORNL; Pesavento, Philip V [ORNL

2011-01-01T23:59:59.000Z

162

High-power, high-intensity laser propagation and interactions  

SciTech Connect

This paper presents overviews of a number of processes and applications associated with high-power, high-intensity lasers, and their interactions. These processes and applications include: free electron lasers, backward Raman amplification, atmospheric propagation of laser pulses, laser driven acceleration, atmospheric lasing, and remote detection of radioactivity. The interrelated physical mechanisms in the various processes are discussed.

Sprangle, Phillip [Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375 (United States); Electrical and Computer Engineering and Physics, University of Maryland, College Park, Maryland 20740 (United States); Hafizi, Bahman [Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375 (United States)

2014-05-15T23:59:59.000Z

163

Environmental Mitigation Technology (Innovative System Testing)-Deployment and Testing of the Alden Hydropower Fish-Friendly Turbine  

Energy.gov (U.S. Department of Energy (DOE))

Environmental Mitigation Technology (Innovative System Testing)-Deployment and Testing of the Alden Hydropower Fish-Friendly Turbine

164

51-Mile Hydroelectric Power Project Demonstration of new methodologies to reduce the LCOE for small, hydropower development  

Energy.gov (U.S. Department of Energy (DOE))

51-Mile Hydroelectric Power Project Demonstration of new methodologies to reduce the LCOE for small, hydropower development

165

Representing Energy Price Variability in Long-and Medium-term Hydropower Optimization  

E-Print Network (OSTI)

, 2002). The output of each hydropower plant is usually small relative to the overall energy market1 Representing Energy Price Variability in Long- and Medium- term Hydropower Optimization Marcelo A Department of Civil and Environmental Engineering, University of California, Davis, USA Journal of Water

Pasternack, Gregory B.

166

2014 Water Power Program Peer Review: Hydropower Technologies, Compiled Presentations (Presentation)  

SciTech Connect

This document represents a collection of all presentations given during the EERE Wind and Water Power Program's 2014 Hydropower Peer Review. The purpose of the meeting was to evaluate DOE-funded hydropower and marine and hydrokinetic R&D projects for their contribution to the mission and goals of the Water Power Program and to assess progress made against stated objectives.

Not Available

2014-02-01T23:59:59.000Z

167

COLLECTIVE EVIDENCE FOR INVERSE COMPTON EMISSION FROM EXTERNAL PHOTONS IN HIGH-POWER BLAZARS  

SciTech Connect

We present the first collective evidence that Fermi-detected jets of high kinetic power (L{sub kin}) are dominated by inverse Compton emission from upscattered external photons. Using a sample with a broad range in orientation angle, including radio galaxies and blazars, we find that very high power sources (L{sub kin} > 10{sup 45.5} erg s{sup -1}) show a significant increase in the ratio of inverse Compton to synchrotron power (Compton dominance) with decreasing orientation angle, as measured by the radio core dominance and confirmed by the distribution of superluminal speeds. This increase is consistent with beaming expectations for external Compton (EC) emission, but not for synchrotron self-Compton (SSC) emission. For the lowest power jets (L{sub kin} < 10{sup 43.5} erg s{sup -1}), no trend between Compton and radio core dominance is found, consistent with SSC. Importantly, the EC trend is not seen for moderately high power flat spectrum radio quasars with strong external photon fields. Coupled with the evidence that jet power is linked to the jet speed, this finding suggests that external photon fields become the dominant source of seed photons in the jet comoving frame only for the faster and therefore more powerful jets.

Meyer, Eileen T.; Fossati, Giovanni [Department of Physics and Astronomy, Rice University, Houston, TX 77005 (United States); Georganopoulos, Markos [Department of Physics, Joint Center for Astrophysics, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 (United States); Lister, Matthew L. [Department of Physics, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907 (United States)

2012-06-10T23:59:59.000Z

168

Prospects for Combining Energy and Environmental Objectives in Hydropower Optimization Brennan T. Smith and Henriette I. Jager  

E-Print Network (OSTI)

1 Prospects for Combining Energy and Environmental Objectives in Hydropower Optimization Brennan T, we review studies that derived rules for hydropower operation by solving optimization problems driven be compatible with hydropower optimization. Given the increasing value placed on the ecological sustainability

Jager, Henriette I.

169

Micro-hydropower: status and prospects IT Power Limited, The Manor House, Chineham Court, Luytens Close, Chineham, Hants, UK  

E-Print Network (OSTI)

, Luytens Close, Chineham, Hants, UK Abstract: Hydropower on a small scale, or micro-hydro, is one productivity and lifetime. Hydropower on a small-scale, or micro-hydro, is the exploitation of a river's hydro. 1.1 Small-scale hydro Hydropower has various degrees of `smallness'. To date there is still

Kammen, Daniel M.

170

Hydropower Upgrades to Yield Added Generation at Average Costs Less Than 4  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydropower Upgrades to Yield Added Generation at Average Costs Less Hydropower Upgrades to Yield Added Generation at Average Costs Less Than 4 cents per kWh - Without New Dams Hydropower Upgrades to Yield Added Generation at Average Costs Less Than 4 cents per kWh - Without New Dams November 4, 2009 - 12:00am Addthis WASHINGTON, DC - U.S. Energy Secretary Steven Chu today announced up to $30.6 million in Recovery Act funding for the selection of seven hydropower projects that modernize hydropower infrastructure by increasing efficiency and reducing environmental impacts at existing facilities. The expanded hydro generation projects have estimated incremental costs of less than 4 cents per kWh on average. The selections announced today will deploy innovative technologies such as high-efficiency, fish-friendly turbines, improved water intakes, and

171

Small Hydropower Systems: Energy Efficiency and Renewable Energy Clearinghouse (EREC) Fact Sheet  

NLE Websites -- All DOE Office Websites (Extended Search)

you're considering building a small you're considering building a small hydropower system on water flowing through your property, you have a long tradition from which to draw your inspi- ration. Two thousand years ago, the Greeks learned to harness the power of running water to turn the massive wheels that rotated the shafts of their wheat flour grinders. And in the hydropower heyday of the 18th century, thousands of towns and cities worldwide were located around small hydropower sites. Today, small hydropower projects offer emissions-free power solutions for many remote communities throughout the world-such as those in Nepal, India, China, and Peru-as well as for highly industrialized countries, like the United States. This fact sheet will help you determine whether a small hydropower system will

172

Indonesia-GTZ Mini-Hydropower Schemes for Sustainable Economic Development  

Open Energy Info (EERE)

Indonesia-GTZ Mini-Hydropower Schemes for Sustainable Economic Development Indonesia-GTZ Mini-Hydropower Schemes for Sustainable Economic Development Jump to: navigation, search Logo: Indonesia-GTZ Mini-Hydropower Schemes for Sustainable Economic Development Name Indonesia-GTZ Mini-Hydropower Schemes for Sustainable Economic Development Agency/Company /Organization Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH Partner on behalf of Bundesministerium für Wirtschaftliche Zusammenarbeit und Entwicklung (BMZ); Directorate General for International Cooperation (DGIS Niederlande) Sector Energy Topics Background analysis Website http://www.gtz.de/en/themen/16 Program Start 1999 Program End 2008 Country Indonesia UN Region South-Eastern Asia References Mini-Hydropower Schemes for Sustainable Economic Development[1]

173

High Power Superconducting Continuous Wave Linacs for Protons and  

Office of Science (SC) Website

Power Superconducting Continuous Power Superconducting Continuous Wave Linacs for Protons and Heavy-Ions Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Spinoff Applications Spinoff Archives SBIR/STTR Applications of Nuclear Science and Technology Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » Spinoff Archives High Power Superconducting Continuous Wave Linacs for Protons and Heavy-Ions Print Text Size: A A A RSS Feeds FeedbackShare Page Application/instrumentation: High Power Superconducting Continuous Wave Linacs for Protons and Heavy-Ions

174

Understanding High-Power Fiber-Optic Laser Beam Delivery  

NLE Websites -- All DOE Office Websites (Extended Search)

High-Power Fiber-Optic Laser Beam Delivery High-Power Fiber-Optic Laser Beam Delivery The submitted manuscript has been authored by a contractor of the U.S. Government under contract No. W- 31-109-ENG-38. Accordingly, the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for U.S. Government purposes. Boyd V. Hunter and Keng H. Leong Argonne National Laboratory Technology Development Division Laser Applications Laboratory 9700 South Cass Avenue, Building 207 Argonne, Illinois 60439 Carl B. Miller, James F. Golden, Robert D. Glesias and Patrick J. Laverty U. S. Laser Corporation 825 Windham Court North P. O. Box 609 Wyckoff, New Jersey 07481 March 25, 1996 Manuscript to be submitted to Journal of Laser Applications

175

High power l-band fast phase shifter  

SciTech Connect

Following successful testing of a concept prototype of a waveguide-based high power phase shifter, a design of a fast, high power device has been developed. The shifter uses two magnetically biased blocks of Yttrium Iron Garnet (YIG) positioned along the side walls of a rectangular waveguide. The cross-section of the waveguide is chosen to suppress unwanted RF modes that could otherwise compromise performance of the phase shifter. Static bias field in the YIG blocks is created by employing permanent magnets. Low inductance coils in the same magnetic circuit excite fast component of the bias field. Design of the device ensures effective heat extraction from the YIG blocks and penetration of the fast magnetic field inside the waveguide with minimum delay. This paper summarizes main steps in this development and gives brief description of the system.

Terechkine, I.; Khabiboulline, T.; Solyak, N.; /Fermilab

2008-10-01T23:59:59.000Z

176

Designing high power targets with computational fluid dynamics (CFD)  

SciTech Connect

High power liquid hydrogen (LH2) targets, up to 850 W, have been widely used at Jefferson Lab for the 6 GeV physics program. The typical luminosity loss of a 20 cm long LH2 target was 20% for a beam current of 100 ?A rastered on a square of side 2 mm on the target. The 35 cm long, 2500 W LH2 target for the Qweak experiment had a luminosity loss of 0.8% at 180 ?A beam rastered on a square of side 4 mm at the target. The Qweak target was the highest power liquid hydrogen target in the world and with the lowest noise figure. The Qweak target was the first one designed with CFD at Jefferson Lab. A CFD facility is being established at Jefferson Lab to design, build and test a new generation of low noise high power targets.

Covrig, S. D. [Thomas Jefferson National Laboratory, Newport News, VA 23606 (United States)

2013-11-07T23:59:59.000Z

177

Active high-power RF switch and pulse compression system  

DOE Patents (OSTI)

A high-power RF switching device employs a semiconductor wafer positioned in the third port of a three-port RF device. A controllable source of directed energy, such as a suitable laser or electron beam, is aimed at the semiconductor material. When the source is turned on, the energy incident on the wafer induces an electron-hole plasma layer on the wafer, changing the wafer's dielectric constant, turning the third port into a termination for incident RF signals, and. causing all incident RF signals to be reflected from the surface of the wafer. The propagation constant of RF signals through port 3, therefore, can be changed by controlling the beam. By making the RF coupling to the third port as small as necessary, one can reduce the peak electric field on the unexcited silicon surface for any level of input power from port 1, thereby reducing risk of damaging the wafer by RF with high peak power. The switch is useful to the construction of an improved pulse compression system to boost the peak power of microwave tubes driving linear accelerators. In this application, the high-power RF switch is placed at the coupling iris between the charging waveguide and the resonant storage line of a pulse compression system. This optically controlled high power RF pulse compression system can handle hundreds of Megawatts of power at X-band.

Tantawi, Sami G. (San Mateo, CA); Ruth, Ronald D. (Woodside, CA); Zolotorev, Max (Mountain View, CA)

1998-01-01T23:59:59.000Z

178

High power test of a 57-MHz CW RFQ.  

SciTech Connect

High power heavy-ion drivers require a CW low-frequency RFQ for initial acceleration. The low frequency specifications required for heavy-ion acceleration typically result in large dimensions of the structure. By appropriate choice of the resonant structure for the Rare Isotope Accelerator (RIA) driver RFQ we have achieved moderate transverse dimensions of the cavity and high quality accelerating-focusing fields required for simultaneous acceleration of multiple-charge-state ion beams. In our application the RFQ must provide stable operation over a wide range of RF power levels to allow acceleration of masses from protons up to uranium. To demonstrate the technology and high-power operation we have built an engineering prototype of one-segment of the 57-MHz RFQ structure. The RFQ is designed as a 100% OFE copper structure and fabricated with a two-step furnace brazing process. The errors in the tip-to-tip distances of the vanes average less than 50 microns. The RF measurements show excellent electrical properties of the resonator with a measured intrinsic Q equal to 94% of the simulated value. In this paper we report final results of high-power tests.

Ostroumov, P. N.; Barcikowski, A.; Clifft, B.; Rusthoven, B.; Sharma, S.; Sharamentov, S. I.; Toter, W. F.; Rathke, J. W.; Vinogradov, N. E.; Schrage, D. L.; Advanced Energy Systems; Northern Illinois Univ.; TechSource

2006-01-01T23:59:59.000Z

179

16 R&D Projects Across 11 States to Advance Hydropower in U.S. | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6 R&D Projects Across 11 States to Advance Hydropower in U.S. 6 R&D Projects Across 11 States to Advance Hydropower in U.S. 16 R&D Projects Across 11 States to Advance Hydropower in U.S. September 6, 2011 - 3:38pm Addthis Rajesh Dham Hydropower Technology Team Lead Today, Secretary Chu announced that the Energy Department is funding 16 projects that will make hydropower production even more efficient, cost-effective and environmentally friendly. These research projects will help advance hydropower technologies - providing clean power to Americans while creating jobs. Hydropower technologies capture water's potential energy via a turbine to generate electricity. It is the nation's largest, most reliable, and least expensive source of renewable power generation. Companies, universities, national laboratories, and local governments

180

Electron beam diagnostic for profiling high power beams  

DOE Patents (OSTI)

A system for characterizing high power electron beams at power levels of 10 kW and above is described. This system is comprised of a slit disk assembly having a multitude of radial slits, a conducting disk with the same number of radial slits located below the slit disk assembly, a Faraday cup assembly located below the conducting disk, and a start-stop target located proximate the slit disk assembly. In order to keep the system from over-heating during use, a heat sink is placed in close proximity to the components discussed above, and an active cooling system, using water, for example, can be integrated into the heat sink. During use, the high power beam is initially directed onto a start-stop target and after reaching its full power is translated around the slit disk assembly, wherein the beam enters the radial slits and the conducting disk radial slits and is detected at the Faraday cup assembly. A trigger probe assembly can also be integrated into the system in order to aid in the determination of the proper orientation of the beam during reconstruction. After passing over each of the slits, the beam is then rapidly translated back to the start-stop target to minimize the amount of time that the high power beam comes in contact with the slit disk assembly. The data obtained by the system is then transferred into a computer system, where a computer tomography algorithm is used to reconstruct the power density distribution of the beam.

Elmer, John W. (Danville, CA); Palmer, Todd A. (Livermore, CA); Teruya, Alan T. (Livermore, CA)

2008-03-25T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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 Linac4 DTL Prototype: Low and High Power Measurements  

E-Print Network (OSTI)

The prototype of the Linac4 Drift Tube Linac (DTL) has undergone low power measurements in order to verify the RF coupling and to adjust the post-coupler lengths based on bead-pull and spectrum measurements. Following the installation at the test stand, the cavity has been subjected to high power operation at Linac4 and SPL duty cycles. Saturation effects and multipacting have been observed and linked to X-ray emission. Voltage holding is reported in the presence of magnetic fields from permanent magnet quadrupoles (PMQ) installed in the first drift tubes.

De Michele, G; Marques-Balula, J; Ramberger, S

2012-01-01T23:59:59.000Z

182

The Quest for Ultimate Broadband High Power Microwaves  

E-Print Network (OSTI)

Paper describes High Power Microwave research of combining GW peak power to achieve MV/m and GV/m radiated fields in 1 to 500 GHz band. To achieve such fields multiple independently triggered broadband GW sources, supplying power to multiple spatially distributed broadband radiators/antennas are used. Single TW array is used as an ultimate microwave weapon in 1 to 5 GHz range while multiple TW arrays provide GV/m radiating field at plasma frequencies in 300 GHz range leading to fusion power.

Podgorski, Andrew S

2014-01-01T23:59:59.000Z

183

High-power pulse modulator with ignitron discharger  

SciTech Connect

The high-power pulse modulator described here is used to produce spatial gaseous discharges and has an improved, controllable charging circuit, which permits a type ITR-4 ignitron discharger to be employed in a frequency mode as the basic commutator. The modulator is utilized in two modes: at a pulse repetition frequency of 50 Hz pulses are formed that have a duration of 25 usec and energies up to 3.5 kJ and at a frequency of 200 Hz, the pulses have a duration of -2 usec and energies up to 600 J. In all conditions the modulator operated stably with a wide range of load changes.

Anisimova, T.E.; Akkuratov, E.V.; Artemov, V.A.; Gromovenko, V.M.; Kalinin, V.P.; Nikonov, V.P.

1985-10-01T23:59:59.000Z

184

Photonic microwave generation with high-power photodiodes  

E-Print Network (OSTI)

We utilize and characterize high-power, high-linearity modified uni-traveling carrier (MUTC) photodiodes for low-phase-noise photonic microwave generation based on optical frequency division. When illuminated with picosecond pulses from a repetition-rate-multiplied gigahertz Ti:sapphire modelocked laser, the photodiodes can achieve 10 GHz signal power of +14 dBm. Using these diodes, a 10 GHz microwave tone is generated with less than 500 attoseconds absolute integrated timing jitter (1 Hz-10 MHz) and a phase noise floor of -177 dBc/Hz. We also characterize the electrical response, amplitude-to-phase conversion, saturation and residual noise of the MUTC photodiodes.

Fortier, Tara M; Hati, Archita; Nelson, Craig; Taylor, Jennifer A; Fu, Yang; Campbell, Joe; Diddams, Scott A

2013-01-01T23:59:59.000Z

185

Optical power splitter for splitting high power light  

DOE Patents (OSTI)

An optical power splitter for the distribution of high-power light energy has a plurality of prisms arranged about a central axis to form a central channel. The input faces of the prisms are in a common plane which is substantially perpendicular to the central axis. A beam of light which is substantially coaxial to the central axis is incident on the prisms and at least partially strikes a surface area of each prism input face. The incident beam also partially passes through the central channel. 5 figs.

English, R.E. Jr.; Christensen, J.J.

1995-04-18T23:59:59.000Z

186

High-Power Directional Emission from Microlasers with Chaotic Resonators  

E-Print Network (OSTI)

High-power and highly directional semiconductor cylinder-lasers based on an optical resonator with deformed cross section are reported. In the favorable directions of the far-field, a power increase of up to three orders of magnitude over the conventional circularly symmetric lasers was obtained. A "bow-tie"-shaped resonance is responsible for the improved performance of the lasers in the higher range of deformations, in contrast to "whispering-gallery"-type modes of circular and weakly deformed lasers. This resonator design, although demonstrated here in midinfrared quantum-cascade lasers, should be applicable to any laser based on semiconductors or other high-refractive index materials.

Claire Gmachl; Federico Capasso; E. E. Narimanov; Jens U. Noeckel; A. Douglas Stone; Jerome Faist; Deborah L. Sivco; Alfred Y. Cho

1998-06-15T23:59:59.000Z

187

Diversion assumptions for high-powered research reactors  

SciTech Connect

This study deals with diversion assumptions for high-powered research reactors -- specifically, MTR fuel; pool- or tank-type research reactors with light-water moderator; and water, beryllium, or graphite reflectors, and which have a power level of 25 MW(t) or more. The objective is to provide assistance to the IAEA in documentation of criteria and inspection observables related to undeclared plutonium production in the reactors described above, including: criteria for undeclared plutonium production, necessary design information for implementation of these criteria, verification guidelines including neutron physics and heat transfer, and safeguards measures to facilitate the detection of undeclared plutonium production at large research reactors.

Binford, F.T.

1984-01-01T23:59:59.000Z

188

Microsoft PowerPoint - SW Regional Hydropower Conference - June 2007.ppt  

NLE Websites -- All DOE Office Websites (Extended Search)

of Engineers® of Engineers® Vision Statement Vision Statement Be the premier stewards of entrusted hydropower resources US Army Corps of Engineers® Mission Statement Mission Statement Provide reliable hydroelectric power services at the lowest possible cost, consistent with sound business principles, in partnership with other Federal hydropower generators, the Power Marketing Administrations, and Preference Customers, to benefit the Nation. US Army Corps of Engineers® Mission Statement Mission Statement Provide reliable hydroelectric power services at the lowest possible cost, consistent with sound business principles, in partnership with other Federal hydropower generators, the Power Marketing Administrations, and Preference Customers, to benefit the Nation. US Army Corps

189

DOE Hydropower Program biennial report 1992--1993 (with an updated annotated bibliography)  

SciTech Connect

This report, the latest in a series of annual/biennial Hydropower Program reports sponsored by the US Department of Energy, summarizes the research and development and technology transfer activities of fiscal years 1992 and 1993. The report discusses the activities in the four areas of the hydropower program: Environmental research; resource assessment; research coat shared with industry; and technology transfer. The report also offers an annotated bibliography of reports pertinent to hydropower, written by persons in Federal and state agencies, cities, metropolitan water districts, irrigation companies, and public and independent utilities. Most reports are available from the National Technical Information Service.

Cada, G.F.; Sale, M.J. [Oak Ridge National Lab., TN (United States); Francfort, J.E.; Rinehart, B.N.; Sommers, G.L. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

1993-07-01T23:59:59.000Z

190

Laser Seeding Yields High-Power Coherent Terahertz Radiation  

NLE Websites -- All DOE Office Websites (Extended Search)

Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Researchers at Berkeley Lab have been exploring the ways coherent synchrotron radiation (CSR) is generated in electron storage rings when femtosecond lasers are used to carve out ultrafast x-ray pulses by femtoslicing (see "Tailored Terahertz Pulses from a Laser-Modulated Electron Beam"). In their most recent work, the researchers reported the first observation of seeding an instability of the electron beam by the laser, and they presented a physical model that shows how this occurs under the proper conditions. Such a mechanism makes it possible to control the instability onset and to exploit its gain for the generation of pulses of terahertz CSR of unprecedented power. Terahertz radiation with a wavelength from about 1 cm to about 100 microns between the microwave and the infrared would provide access to a large number of fundamental phenomena. To mention only some of them: excited electrons orbit, small molecules rotate, proteins vibrate, superconducting energy gaps resonate, and gaseous and solid-state plasmas oscillate at terahertz frequencies. But generating terahertz radiation is ordinarily a challenging task for any kind of source, including storage-ring-based synchrotron light sources. The new findings by the ALS group could represent a significant step toward satisfying the need for powerful terahertz sources.

191

Laser Seeding Yields High-Power Coherent Terahertz Radiation  

NLE Websites -- All DOE Office Websites (Extended Search)

Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Researchers at Berkeley Lab have been exploring the ways coherent synchrotron radiation (CSR) is generated in electron storage rings when femtosecond lasers are used to carve out ultrafast x-ray pulses by femtoslicing (see "Tailored Terahertz Pulses from a Laser-Modulated Electron Beam"). In their most recent work, the researchers reported the first observation of seeding an instability of the electron beam by the laser, and they presented a physical model that shows how this occurs under the proper conditions. Such a mechanism makes it possible to control the instability onset and to exploit its gain for the generation of pulses of terahertz CSR of unprecedented power. Terahertz radiation with a wavelength from about 1 cm to about 100 microns between the microwave and the infrared would provide access to a large number of fundamental phenomena. To mention only some of them: excited electrons orbit, small molecules rotate, proteins vibrate, superconducting energy gaps resonate, and gaseous and solid-state plasmas oscillate at terahertz frequencies. But generating terahertz radiation is ordinarily a challenging task for any kind of source, including storage-ring-based synchrotron light sources. The new findings by the ALS group could represent a significant step toward satisfying the need for powerful terahertz sources.

192

Uppsala High Power Test Stand for ESS Spoke Cavities  

E-Print Network (OSTI)

The European Spallation Source (ESS) is one of the world’s most powerful neutron source. The ESS linac will accelerate 50mA pulse current of protons to 2.5GeV in 2.86 ms long pulses at a repetition rate of 14 Hz. It produces a beam with 5MW average power and 125MW peak power. ESS Spoke Linac consist of 28 superconducting spoke cavities, which will be developed by IPN Orsay, France. These Spoke Cavities will be tested at low power at IPN Orsay and high power testing will be performed in a high power test stand at Uppsala University. The test stand consists of tetrode based RF amplifier chain (352MHz, 350 kW) power and related RF distribution. Outputs of two tetrodes shall be combined with the hybrid coupler to produce 350 kW power. Preamplifier for a tetrode shall be solid state amplifier. As the spoke cavities are superconducting, the test stand also includes horizontal cryostat, Helium liquefier, test bunker etc. The paper describes features of the test stand in details.

Yogi, RA; Dancila, D; Gajewski, K; Hermansson, L; Noor, M; Wedberg, R; Santiago-Kern, R; Ekelöf, T; Lofnes, T; Ziemann, V; Goryashko, V; Ruber, R

2013-01-01T23:59:59.000Z

193

HIGH-POWER RF DISTRIBUTION SYSTEMFOR THE 8-PACK PROJECT  

SciTech Connect

The 8-Pack Project at SLAC is a prototype rf system whose goal is to demonstrate the high-power X-band technology developed in the NLC/GLC (Next/Global Linear Collider) program. In its first phase, it has reliably produced a 400 ns rf pulse of over 500 MW using a solidstate modulator, four 11.424 GHz klystrons and a dualmoded SLED-II pulse compressor. In Phase 2, the output power of the system has been delivered into the bunker of the NLCTA (Next Linear Collider Test Accelerator) and divided between several accelerator structures for beam acceleration. The authors describe here the design, cold-test measurements, and processing of this power distribution system. Due to the high power levels and the need for efficiency, overmoded waveguide and components are used. For power transport, the TE{sub 01} mode is used in 7.44 cm and 4.064 cm diameter circular waveguide. Only near the structures is standard WR90 rectangular waveguide employed. Components used to manipulate the rf power include transitional tapers, mode converters, overmoded bends, fractional directional couplers, and hybrids.

Nantista, C

2004-08-24T23:59:59.000Z

194

File:Federal Hydropower - Southwestern Power Administration.pdf | Open  

Open Energy Info (EERE)

Administration.pdf Administration.pdf Jump to: navigation, search File File history File usage Metadata File:Federal Hydropower - Southwestern Power Administration.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 715 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:35, 22 May 2013 Thumbnail for version as of 15:35, 22 May 2013 1,275 × 1,650, 2 pages (715 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage

195

Feasibility of Hydrogen Production from Micro Hydropower Projects in Nepal  

E-Print Network (OSTI)

The current energy crisis in Nepal clearly indicates that the future energy-demand cannot be met by traditional energy-sources. Community-based micro-hydropower operations are considered to be one of the most feasible options for energy development. However, the power plant capacity factor remains very low due to limited commercial and business opportunities. Generation of hydrogen (H2) from the unutilized power could eradicate this problem. This new energy carrier is clean, can save foreign currency and increases the energy-security. The aim of this study is to determine the potential of H2 production from excess energy of a micro-hydro project in rural Nepal using “HOMER ” from NREL.

M. S. Zaman; A. B. Chhetri; M. S. Tango

2010-01-01T23:59:59.000Z

196

Development of environmentally advanced hydropower turbine system design concepts  

SciTech Connect

A team worked together on the development of environmentally advanced hydro turbine design concepts to reduce hydropower`s impact on the environment, and to improve the understanding of the technical and environmental issues involved, in particular, with fish survival as a result of their passage through hydro power sites. This approach brought together a turbine design and manufacturing company, biologists, a utility, a consulting engineering firm and a university research facility, in order to benefit from the synergy of diverse disciplines. Through a combination of advanced technology and engineering analyses, innovative design concepts adaptable to both new and existing hydro facilities were developed and are presented. The project was divided into 4 tasks. Task 1 investigated a broad range of environmental issues and how the issues differed throughout the country. Task 2 addressed fish physiology and turbine physics. Task 3 investigated individual design elements needed for the refinement of the three concept families defined in Task 1. Advanced numerical tools for flow simulation in turbines are used to quantify characteristics of flow and pressure fields within turbine water passageways. The issues associated with dissolved oxygen enhancement using turbine aeration are presented. The state of the art and recent advancements of this technology are reviewed. Key elements for applying turbine aeration to improve aquatic habitat are discussed and a review of the procedures for testing of aerating turbines is presented. In Task 4, the results of the Tasks were assembled into three families of design concepts to address the most significant issues defined in Task 1. The results of the work conclude that significant improvements in fish passage survival are achievable.

Franke, G.F.; Webb, D.R.; Fisher, R.K. Jr. [Voith Hydro, Inc. (United States)] [and others

1997-08-01T23:59:59.000Z

197

Dependence of hydropower energy generation on forests in the Amazon Basin at local and regional scales  

Science Journals Connector (OSTI)

...including Brazil, Peru, Colombia...their hydropower energy capacity over...and most other renewable forms of electricity...solar and wind energy improve their...transition to renewable energy is storing excess...however, Brazil’s discovery...

Claudia M. Stickler; Michael T. Coe; Marcos H. Costa; Daniel C. Nepstad; David G. McGrath; Livia C. P. Dias; Hermann O. Rodrigues; Britaldo S. Soares-Filho

2013-01-01T23:59:59.000Z

198

Huge Potential for Hydropower: Assessment Highlights New Possible Clean Energy Sources  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department’s New Stream-reach Development Assessment, conducted by Oak Ridge National Laboratory, has identified more than 65 gigawatts of untapped sustainable hydropower potential in U.S. rivers and streams.

199

Energy Department Announces $4.4 Million to Advance Hydropower Manufacturing  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced a total of $4.4 million for two projects in Michigan and Pennsylvania to support the use of advanced materials and manufacturing techniques in the development of new “low-head” hydropower technologies.

200

Climate Change Effects on Hydropower Potential in the Alcantara River Basin in Sicily (Italy)  

Science Journals Connector (OSTI)

In recent years, increasing attention has been paid to hydropower generation, since it is a renewable, efficient, and reliable source of energy, as well as an effective tool to reduce the atmospheric concentrations of greenhouse gases resulting ...

G. T. Aronica; B. Bonaccorso

2013-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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.


201

E-Print Network 3.0 - atr high-power mixed-oxide Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

75 A. R&D on a 50-kW, High-Efficiency, High-Power-Density, CO-Tolerant PEM Fuel Cell Stack System... of its high power density, quick start-up capability, and...

202

Develop high energy high power Li-ion battery cathode materials : a first principles computational study  

E-Print Network (OSTI)

develop the high energy high power cathode materials for LIBNew Cathode Material for Batteries of High- Energy Density.High Energy High Power Li-ion Battery Cathode Materials A

Xu, Bo; Xu, Bo

2012-01-01T23:59:59.000Z

203

Develop high energy high power Li-ion battery cathode materials : a first principles computational study  

E-Print Network (OSTI)

as cathode materials for Li-ion battery. Physica B-CondensedHigh Energy High Power Li-ion Battery Cathode Materials AHigh Energy High Power Li-ion Battery Cathode Materials A

Xu, Bo; Xu, Bo

2012-01-01T23:59:59.000Z

204

Application of High Powered Lasers to Perforated Completions  

NLE Websites -- All DOE Office Websites (Extended Search)

Congress on Applications of Laser & Electro-Optics Congress on Applications of Laser & Electro-Optics October 13 - 16, 2003, Jacksonville, Florida Application of High Powered Lasers to Perforated Completions Zhiyue Xu, Claude B. Reed and Keng H. Leong Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 R. A. Parker Parker Geoscience Consulting, LLC, 6346 Secrest Street, Arvada, CO 80403 R. M. Graves, Petroleum Engineering Department, Colorado School of Mines, Golden, CO 80401 ABSTRACT As part of the process of drilling an oil or gas well, a steel production casing is often inserted to the bottom of the well and sealed with cement against the productive formation. Openings must be made through the steel casing wall and cement and into the rock formation to allow formation fluid to enter the well. Conventionally, a perforator is

205

High Power Operation of the JLab IR FEL Driver Accelerator  

SciTech Connect

Operation of the JLab IR Upgrade FEL at CW powers in excess of 10 kW requires sustained production of high electron beam powers by the driver ERL. This in turn demands attention to numerous issues and effects, including: cathode lifetime; control of beamline and RF system vacuum during high current operation; longitudinal space charge; longitudinal and transverse matching of irregular/large volume phase space distributions; halo management; management of remnant dispersive effects; resistive wall, wake-field, and RF heating of beam vacuum chambers; the beam break up instability; the impact of coherent synchrotron radiation (both on beam quality and the performance of laser optics); magnetic component stability and reproducibility; and RF stability and reproducibility. We discuss our experience with these issues and describe the modus vivendi that has evolved during prolonged high current, high power beam and laser operation.

Kevin Beard; Stephen Benson; George Biallas; James Boyce; Donald Bullard; James Coleman; David Douglas; H. Dylla; Richard Evans; Pavel Evtushenko; Christopher Gould; Albert Grippo; Joseph Gubeli; David Hardy; Carlos Hernandez-Garcia; J. Hovater; Kevin Jordan; John Klopf; Rui Li; Steven Moore; George Neil; Benard Poelker; Thomas Powers; Joseph Preble; Robert Rimmer; Daniel Sexton; Michelle D. Shinn; Christopher Tennant; Richard Walker; Gwyn Williams; Shukui Zhang

2007-08-01T23:59:59.000Z

206

Plasma Switch for High-Power Active Pulse Compressor  

SciTech Connect

Results are presented from experiments carried out at the Naval Research Laboratory X-band magnicon facility on a two-channel X-band active RF pulse compressor that employed plasma switches. Experimental evidence is shown to validate the basic goals of the project, which include: simultaneous firing of plasma switches in both channels of the RF circuit, operation of quasi-optical 3-dB hybrid directional coupler coherent superposition of RF compressed pulses from both channels, and operation of the X-band magnicon directly in the RF pulse compressor. For incident 1.2 ?s pulses in the range 0.63 ? 1.35 MW, compressed pulses of peak powers 5.7 ? 11.3 MW were obtained, corresponding to peak power gain ratios of 8.3 ? 9.3. Insufficient bakeout and conditioning of the high-power RF circuit prevented experiments from being conducted at higher RF input power levels.

Hirshfield, Jay L. [Omega-P, Inc.] [Omega-P, Inc.

2013-11-04T23:59:59.000Z

207

A low?frequency high?power magnetic drive transducer  

Science Journals Connector (OSTI)

Ralph Woollett's contributions to the art and science of sonartransducer design were as a researcher teacher author and reviewer. Of these roles perhaps the most important the one that became his legacy was that of teacher: All of his colleagues were in a sense his pupils. His careful and thorough approach to transducer design problems inspired us to try to meet his high standards and we still miss his insight advice encouragement and criticism. This talk will review Ralph's influence on underwater electroacoustics present some anecdotes about his life and work and examine the circumstances of his death. Finally it will show how Ralph's ideas and design philosophy have affected some of the author's present research specifically the design of a low?frequency high?power magnetic drive transducer having low distortion.

William J. Marshall

1990-01-01T23:59:59.000Z

208

An adaptive crystal bender for high power synchrotron radiation beams  

SciTech Connect

Perfect crystal monochromators cannot diffract x-rays efficiently, nor transmit the high source brightness available at synchrotron radiation facilities, unless surface strains within the beam footprint are maintained within a few arcseconds. Insertion devices at existing synchrotron sources already produce x-ray power density levels that can induce surface slope errors of several arcseconds on silicon monochromator crystals at room temperature, no matter how well the crystal is cooled. The power density levels that will be produced by insertion devices at the third-generation sources will be as much as a factor of 100 higher still. One method of restoring ideal x-ray diffraction behavior, while coping with high power levels, involves adaptive compensation of the induced thermal strain field. The design and performance, using the X25 hybrid wiggler beam line at the National Synchrotron Light Source (NSLS), of a silicon crystal bender constructed for this purpose are described.

Berman, L.E.; Hastings, J.B.

1992-01-01T23:59:59.000Z

209

An adaptive crystal bender for high power synchrotron radiation beams  

SciTech Connect

Perfect crystal monochromators cannot diffract x-rays efficiently, nor transmit the high source brightness available at synchrotron radiation facilities, unless surface strains within the beam footprint are maintained within a few arcseconds. Insertion devices at existing synchrotron sources already produce x-ray power density levels that can induce surface slope errors of several arcseconds on silicon monochromator crystals at room temperature, no matter how well the crystal is cooled. The power density levels that will be produced by insertion devices at the third-generation sources will be as much as a factor of 100 higher still. One method of restoring ideal x-ray diffraction behavior, while coping with high power levels, involves adaptive compensation of the induced thermal strain field. The design and performance, using the X25 hybrid wiggler beam line at the National Synchrotron Light Source (NSLS), of a silicon crystal bender constructed for this purpose are described.

Berman, L.E.; Hastings, J.B.

1992-10-01T23:59:59.000Z

210

High power density AEM combustion for TPV applications  

Science Journals Connector (OSTI)

Various emitter designs and compositions are investigated to improve the performance and reduce the cost of thermophotovoltaic (TPV) devices. In order to maximize the overall system efficiency of combustion-powered TPV devices it is desirable to design an emitter system that will provide a high and uniform volumetric heat release producing a high intensity and uniform in-band photons flux thus enabling reduced size and weight of TPV generators. Quantum Group Inc. (QGI) has developed a high power density radiant burner/emitter technology which we have called Advanced Emissive Matrix (AEM). The AEM system is applicable to broad-band and narrow-band TPV approaches. Several AEM combustors-both broad-band and narrow-band-have been built tested and have consistently demonstrated extremely high power density (up to 30 W/cm3). Radiant emissions greater than 27 W/cm2 were measured from an AEM combustor fired with natural gas at 15% excess air. This level of radiant heat flux enables the utilization of concentrator-type PV cells which is a method of reducing cost size and weight of TPV devices. Additionally it was found that the AEM structure could be engineered to provide a desired radiant emission profile. The influence of the primary combustion parameters on emitter performance will also be presented. Therefore integration of the narrow-band emitter materials into an AEM combustor results in the delivery of high intensity selective and uniform photons to the PV cell face that improves TPV device performance.

Aleksandr S. Kushch; Steven M. Skinner

1999-01-01T23:59:59.000Z

211

Disappearing rivers — The limits of environmental assessment for hydropower in India  

SciTech Connect

The mountain rivers of the Indian Himalaya possess a vast potential for hydropower generation. After decades of comparatively modest development recent years have seen a major intensification in the construction of new hydropower dams. Although increasingly portrayed as a form of renewable energy generation, hydropower development may lead to extensive alterations of fluvial systems and conflicts with resource use patterns of local communities. To appraise and reduce adverse effects is the purpose of statutory Environmental Impact Assessments (EIA) and corresponding mitigation plans. However, in the light of ambitious policies for hydropower expansion conventional approaches of environmental assessment are increasingly challenged to keep up with the intensity and pace of development. This paper aims to explore the systemic limitations of environmental assessment for hydropower development in the Indian state of Himachal Pradesh. Based on a qualitative methodology involving interviews with environmental experts, document reviews and field observations the study suggests that the current practice of constraining EIAs to the project level fails to address the larger effects of extensive hydropower development. Furthermore, it is critically discussed as to what extent the concept of Strategic Environmental Assessment (SEA) might have the potential to overcome existing shortcomings.

Erlewein, Alexander, E-mail: erlewein@sai.uni-heidelberg.de

2013-11-15T23:59:59.000Z

212

Correlation between the precipitation and energy production at hydropower plants to mitigate flooding in the Missouri River Basin .  

E-Print Network (OSTI)

??Currently, hydropower plants serve as one source of green energy for power companies. These plants are located in various geographical regions throughout the United States… (more)

Foley, Rachel (Rachel L.)

2013-01-01T23:59:59.000Z

213

Probing Neutrino Oscillation Parameters using High Power Superbeam from ESS  

E-Print Network (OSTI)

A high-power neutrino superbeam experiment at the ESS facility has been proposed such that the source-detector distance falls at the second oscillation maximum, giving very good sensitivity to the measurement of CP violation. In this work, we explore the comparative physics reach of the experiment in terms of leptonic CP-violation, precision on atmospheric parameters, non-maximal theta23, and its octant for a variety of choices for the baselines. We also vary the neutrino vs. the anti-neutrino running time for the beam, and study its impact on the physics goals of the experiment. We find that for the determination of CP violation, 540 km baseline with 7 years of neutrino and 3 years of anti-neutrino (7nu+3nubar) run-plan performs the best and one expects a 4sigma sensitivity to CP violation for 59% of true values of deltaCP. The projected reach for the 200 km baseline with 7nu+3nubar run-plan is somewhat worse with 4sigma sensitivity for 51% of true values of deltaCP. On the other hand, for the discovery of a...

Agarwalla, Sanjib Kumar; Prakash, Suprabh

2014-01-01T23:59:59.000Z

214

Cutting and drilling studies using high power visible lasers  

SciTech Connect

High power and radiance laser technologies developed at Lawrence Livermore National Laboratory such as copper-vapor and dye lasers show great promise for material processing tasks. Evaluation of models suggests significant increases in welding, cutting, and drilling capabilities, as well as applications in emerging technologies such as micromachining, surface treatment, and stereolithography. Copper lasers currently operate at 1.8 kW output at approximately three times the diffraction limit and achieve mean time between failures of more than 1,000 hours. Dye lasers have near diffraction limited beam quality at greater than 1.0 kW. Results from cutting and drilling studies in titanium and stainless steel alloys show that cuts and holes with extremely fine features can be made with dye and copper-vapor lasers. High radiance beams produce low distortion and small heat-affected zones. The authors have accomplished very high aspect ratios (> 60:1) and features with micron scale (5-50 {mu}m) sizes. The paper gives a description of the equipment; discusses cutting theory; and gives experimental results of cutting and drilling studies on Ti-6Al-4V and 304 stainless steel.

Kautz, D.D.; Dragon, E.P.; Werve, M.E.; Hargrove, R.S.; Warner, B.E.

1993-05-27T23:59:59.000Z

215

Advanced, High Power, Next Scale, Wave Energy Conversion Device  

SciTech Connect

The project conducted under DOE contract DE?EE0002649 is defined as the Advanced, High Power, Next Scale, Wave Energy Converter. The overall project is split into a seven?stage, gated development program. The work conducted under the DOE contract is OPT Stage Gate III work and a portion of Stage Gate IV work of the seven stage product development process. The project effort includes Full Concept Design & Prototype Assembly Testing building on our existing PowerBuoy? technology to deliver a device with much increased power delivery. Scaling?up from 150kW to 500kW power generating capacity required changes in the PowerBuoy design that addressed cost reduction and mass manufacturing by implementing a Design for Manufacturing (DFM) approach. The design changes also focused on reducing PowerBuoy Installation, Operation and Maintenance (IO&M) costs which are essential to reducing the overall cost of energy. In this design, changes to the core PowerBuoy technology were implemented to increase capability and reduce both CAPEX and OPEX costs. OPT conceptually envisaged moving from a floating structure to a seabed structure. The design change from a floating structure to seabed structure would provide the implementation of stroke? unlimited Power Take?Off (PTO) which has a potential to provide significant power delivery improvement and transform the wave energy industry if proven feasible.

Mekhiche, Mike [Principal Investigator] [Principal Investigator; Dufera, Hiz [Project Manager] [Project Manager; Montagna, Deb [Business Point of Contact] [Business Point of Contact

2012-10-29T23:59:59.000Z

216

High power continuous-wave titanium:sapphire laser  

DOE Patents (OSTI)

A high-power continuous-wave laser resonator is provided, wherein first, second, third, fourth, fifth and sixth mirrors form a double-Z optical cavity. A first Ti:sapphire rod is disposed between the second and third mirrors and at the mid-point of the length of the optical cavity, and a second Ti:sapphire rod is disposed between the fourth and fifth mirrors at a quarter-length point in the optical cavity. Each Ti:sapphire rod is pumped by two counter-propagating pump beams from a pair of argon-ion lasers. For narrow band operation, a 3-plate birefringent filter and an etalon are disposed in the optical cavity so that the spectral output of the laser consists of 5 adjacent cavity modes. For increased power, seventy and eighth mirrors are disposed between the first and second mirrors to form a triple-Z optical cavity. A third Ti:sapphire rod is disposed between the seventh and eighth mirrors at the other quarter-length point in the optical cavity, and is pumped by two counter-propagating pump beams from a third pair of argon-ion lasers. 5 figures.

Erbert, G.V.; Bass, I.L.; Hackel, R.P.; Jenkins, S.L.; Kanz, V.K.; Paisner, J.A.

1993-09-21T23:59:59.000Z

217

High power KrF laser development at Los Alamos  

SciTech Connect

The objective of the high power laser development program at Los Alamos is to appraise the potential of the KrF laser as a driver for inertial confinement fusion (ICF), ultimately at energy levels that will produce high target gain (gain of order 100). A KrF laser system prototype, the 10-kJ Aurora laser, which is nearing initial system operation, will serve as a feasibility demonstration of KrF technology and system design concepts appropriate to large scale ICF driver systems. The issues of affordable cost, which is a major concern for all ICF drivers now under development, and technology scaling are also being examined. It is found that, through technology advances and component cost reductions, the potential exists for a KrF driver to achieve a cost goal in the neighborhood of $100 per joule. The authors suggest that the next step toward a multimegajoule laboratory microfusion facility (LMF) is an ''Intermediate Driver'' facility in the few hundred kilojoule to one megajoule range, which will help verify the scaling of driver technology and cost to an LMF size. An Intermediate Driver facility would also increase the confidence in the estimates of energy needed for an LMF and would reduce the risk in target performance. 5 refs., 4 figs., 1 tab.

McDonald, T.; Cartwright, D.; Fenstermacher, C.; Figueira, J.; Goldstone, P.; Harris, D.; Mead, W.; Rosocha, L.

1988-01-01T23:59:59.000Z

218

High power linear pulsed beam annealer. [Patent application  

DOE Patents (OSTI)

A high power pulsed electron beam system for annealing semiconductors is comprised of an electron gun having a heated cathode, control grid and focus ring for confining the pulsed beam of electrons to a predetermined area, and a curved drift tube. The drift tube and an annular Faraday shield between the focus ring and the drift tube are maintained at a high positive voltage with respect to the cathode to accelerate electrons passing through the focus ring, thereby eliminating space charge limitations on the emission of electrons from said gun. A coil surrounding the curved drift tube provides a magnetic field which maintains the electron beam focused about the axis of the tube. The magnetic field produced by the coil around the curved tube imparts motion to electrons in a spiral path for shallow penetration of the electrons into a target. It also produces a scalloped profile of the electron beam. A second drift tube spaced a predetermined distance from the curved tube is positioned with its axis aligned with the axis of the first drift tube. The second drift tube and the target holder are maintained at a reference voltage between the cathode voltage and the curved tube voltage to decelerate the electrons. A second coil surrounding the second drift tube, maintains the electron beam focused about the axis of the second drift tube. The magnetic field of the second coil comprises the electron beam to the area of the semiconductor on the target holder.

Strathman, M.D.; Sadana, D.K.; True, R.B.

1980-11-26T23:59:59.000Z

219

Plasma potential mapping of high power impulse magnetron sputtering discharges  

SciTech Connect

Pulsed emissive probe techniques have been used to determine the plasma potential distribution of high power impulse magnetron sputtering (HiPIMS) discharges. An unbalanced magnetron with a niobium target in argon was investigated for pulse length of 100 ?s at a pulse repetition rate of 100 Hz, giving a peak current of 170 A. The probe data were taken with a time resolution of 20 ns and a spatial resolution of 1 mm. It is shown that the local plasma potential varies greatly in space and time. The lowest potential was found over the target’s racetrack, gradually reaching anode potential (ground) several centimeters away from the target. The magnetic pre-sheath exhibits a funnel-shaped plasma potential resulting in an electric field which accelerates ions toward the racetrack. In certain regions and times, the potential exhibits weak local maxima which allow for ion acceleration to the substrate. Knowledge of the local E and static B fields lets us derive the electrons’ E×B drift velocity, which is about 105 m/s and shows structures in space and time.

Rauch, Albert; Mendelsberg, Rueben J.; Sanders, Jason M.; Anders, Andre

2011-12-20T23:59:59.000Z

220

Probing Neutrino Oscillation Parameters using High Power Superbeam from ESS  

E-Print Network (OSTI)

A high-power neutrino superbeam experiment at the ESS facility has been proposed such that the source-detector distance falls at the second oscillation maximum, giving very good sensitivity towards establishing CP violation. In this work, we explore the comparative physics reach of the experiment in terms of leptonic CP-violation, precision on atmospheric parameters, non-maximal theta23, and its octant for a variety of choices for the baselines. We also vary the neutrino vs. the anti-neutrino running time for the beam, and study its impact on the physics goals of the experiment. We find that for the determination of CP violation, 540 km baseline with 7 years of neutrino and 3 years of anti-neutrino (7nu+3nubar) run-plan performs the best and one expects a 5sigma sensitivity to CP violation for 48% of true values of deltaCP. The projected reach for the 200 km baseline with 7nu+3nubar run-plan is somewhat worse with 5sigma sensitivity for 34% of true values of deltaCP. On the other hand, for the discovery of a non-maximal theta23 and its octant, the 200 km baseline option with 7nu+3nubar run-plan performs significantly better than the other baselines. A 5sigma determination of a non-maximal theta23 can be made if the true value of sin^2theta23 lesssim 0.45 or sin^2theta23 gtrsim 0.57. The octant of theta23 could be resolved at 5sigma if the true value of sin^2theta23 lesssim 0.43 or gtrsim 0.59, irrespective of deltaCP.

Sanjib Kumar Agarwalla; Sandhya Choubey; Suprabh Prakash

2015-01-04T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Safety approaches for high power modular laser operation  

SciTech Connect

Approximately 20 years ago, a program was initiated at the Lawrence Livermore National Laboratory (LLNL) to study the feasibility of using lasers to separate isotopes of uranium and other materials. Of particular interest has been the development of a uranium enrichment method for the production of commercial nuclear power reactor fuel to replace current more expensive methods. The Uranium Atomic Vapor Laser Isotope Separation (U-AVLIS) Program has progressed to the point where a plant-scale facility to demonstrate commercial feasibility has been built and is being tested. The U-AVLIS Program uses copper vapor lasers which pump frequency selective dye lasers to photoionize uranium vapor produced by an electron beam. The selectively ionized isotopes are electrostatically collected. The copper lasers are arranged in oscillator/amplifier chains. The current configuration consists of 12 chains, each with a nominal output of 800 W for a system output in excess of 9 kW. The system requirements are for continuous operation (24 h a day, 7 days a week) and high availability. To meet these requirements, the lasers are designed in a modular form allowing for rapid change-out of the lasers requiring maintenance. Since beginning operation in early 1985, the copper lasers have accumulated over 2 million unit hours at a >90% availability. The dye laser system provides approximately 2.5 kW average power in the visible wavelength range. This large-scale laser system has many safety considerations, including high-power laser beams, high voltage, and large quantities ({approximately}3000 gal) of ethanol dye solutions. The Laboratory`s safety policy requires that safety controls be designed into any process, equipment, or apparatus in the form of engineering controls. Administrative controls further reduce the risk to an acceptable level. Selected examples of engineering and administrative controls currently being used in the U-AVLIS Program are described.

Handren, R.T.

1993-03-01T23:59:59.000Z

222

Estimating the Effects of Climate Change on Federal Hydropower and Power Marketing  

SciTech Connect

The U.S. Department of Energy is currently preparing an assessment of the effects of climate change on federal hydropower, as directed by Congress in Section 9505 of the Secure Water Act of 2009 (P.L. 111-11). This paper describes the assessment approach being used in a Report to Congress currently being prepared by Oak Ridge National Laboratory. The 9505 assessment will examine climate change effects on water available for hydropower operations and the future power supplies marketed from federal hydropower projects. It will also include recommendations from the Power Marketing Administrations (PMAs) on potential changes in operation or contracting practices that could address these effects and risks of climate change. Potential adaption and mitigation strategies will also be identified. Federal hydropower comprises approximately half of the U.S. hydropower portfolio. The results from the 9505 assessment will promote better understanding among federal dam owners/operators of the sensitivity of their facilities to water availability, and it will provide a basis for planning future actions that will enable adaptation to climate variability and change. The end-users of information are Congressional members, their staff, the PMAs and their customers, federal dam owners/operators, and the DOE Water Power Program.

Sale, Michael J [ORNL; Kao, Shih-Chieh [ORNL; Uria Martinez, Rocio [ORNL; Wei, Yaxing [ORNL

2011-01-01T23:59:59.000Z

223

HIGH-POWER MILLIMETREWAVE TRANSMISSION SYSTEMS AND COMPONENTS FOR ELECTRON CYCLOTRON HEATING OF FUSION PLASMAS  

Science Journals Connector (OSTI)

At the Institute for Plasma Research at the University of Stuttgart, high-power millimetre wave transmission systems for electron cyclotron heating (ECRH) and current drive (ECCD)...

W. Kasparek; G. Dammertz; V. Erckmann…

2005-01-01T23:59:59.000Z

224

File:Federal Hydropower - Federal Energy Regulatory Commission.pdf | Open  

Open Energy Info (EERE)

Federal Hydropower - Federal Energy Regulatory Commission.pdf Federal Hydropower - Federal Energy Regulatory Commission.pdf Jump to: navigation, search File File history File usage Metadata File:Federal Hydropower - Federal Energy Regulatory Commission.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 740 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:32, 22 May 2013 Thumbnail for version as of 15:32, 22 May 2013 1,275 × 1,650, 2 pages (740 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup

225

File:Federal Hydropower - Bureau of Indian Affairs.pdf | Open Energy  

Open Energy Info (EERE)

Federal Hydropower - Bureau of Indian Affairs.pdf Federal Hydropower - Bureau of Indian Affairs.pdf Jump to: navigation, search File File history File usage Metadata File:Federal Hydropower - Bureau of Indian Affairs.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 685 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:25, 22 May 2013 Thumbnail for version as of 15:25, 22 May 2013 1,275 × 1,650, 2 pages (685 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information)

226

LLCC-PWM Inverter for Driving High-Power Piezoelectric Actuators  

E-Print Network (OSTI)

LLCC-PWM Inverter for Driving High-Power Piezoelectric Actuators Rongyuan Li, Norbert Fröhleke LLCC-PWM inverter is presented for driving ultrasonic high power piezoelectric actuators. The proposed system of a pulse- width modulated inverter and LLCC-type filter is designed in a way to reduce the total

Paderborn, Universität

227

Flow and heat transfer in porous micro heat sink for thermal management of high power LEDs  

Science Journals Connector (OSTI)

A novel porous micro heat sink system is presented for thermal management of high power LEDs, which has high heat transport capability. The operational principle and heat transfer characteristics of porous micro heat sink are analyzed. Numerical model ... Keywords: Heat dissipation, High heat flux, High power LEDs, Porous media, Porous micro heat sink

Z. M. Wan; J. Liu; K. L. Su; X. H. Hu; S. S. M

2011-05-01T23:59:59.000Z

228

Modeling of dimmable High Power LED illumination distribution using ANFIS on the isolated area  

Science Journals Connector (OSTI)

High power light emitting diodes (HP-LEDs) are more suitable for energy saving applications and have becoming replacing traditional fluorescent and incandescent bulbs for its energy efficient. Therefore, HP-LED lighting has been regarded in the next-generation ... Keywords: ANFIS, High Power LED, Illumination distribution

?smail Kiyak; Vedat Topuz; Bülent Oral

2011-09-01T23:59:59.000Z

229

A Thrust Stand for High-power Steady-state Plasma Thrusters L.D. Cassady,  

E-Print Network (OSTI)

of an inverted-pendulum thrust stand to measure thrust for high-power steady- state plasma thrusters is presentedA Thrust Stand for High-power Steady-state Plasma Thrusters L.D. Cassady, A.D. Kodys, and E Department Princeton University, Princeton, New Jersey 08544 (Dated: July 18, 2002) The operation

Choueiri, Edgar

230

Thermal Effects on Inverted Pendulum Thrust Stands for Steady-state High-power Plasma Thrusters  

E-Print Network (OSTI)

Thermal Effects on Inverted Pendulum Thrust Stands for Steady-state High-power Plasma Thrusters A and Aerospace Engineering Department Princeton University, Princeton, New Jersey 08544 AIAA-2003-4842§ July 22, 2003 Abstract Thermal effects on direct measurements of the thrust produced by steady-state, high-power

Choueiri, Edgar

231

Simulation Model of Common-Mode Chokes for High-Power Applications  

E-Print Network (OSTI)

Simulation Model of Common-Mode Chokes for High-Power Applications A. Muetze C. R. Sullivan Found;Simulation Model of Common-Mode Chokes for High-Power Applications Charles R. Sullivan Annette Muetze Thayer simulation models for nanocrystalline cores, and compare the results to experimental measurements. We also

232

A LOW-DISTORTION CLASS-AB AUDIO AMPLIFIER WITH HIGH POWER EFFICIENCY  

E-Print Network (OSTI)

A LOW-DISTORTION CLASS-AB AUDIO AMPLIFIER WITH HIGH POWER EFFICIENCY BY CHAITANYA MOHAN, B of Sciences, Engineering Specialization in: Electrical Engineering New Mexico State University Las Cruces, New Mexico March 2011 #12;"A Low-Distortion Class-AB Audio Amplifier with High Power Efficiency," a the- sis

Furth, Paul

233

Dependence of hydropower energy generation on forests in the Amazon Basin at local and regional scales  

Science Journals Connector (OSTI)

...precipitation (26). Energy Pathways. Nations must...needs for electrical energy while minimizing GHG...social and environmental costs. In the near- to medium-term...wind, nuclear, and geothermal plants. Hydropower...advances for solar and wind energy improve their competitiveness...

Claudia M. Stickler; Michael T. Coe; Marcos H. Costa; Daniel C. Nepstad; David G. McGrath; Livia C. P. Dias; Hermann O. Rodrigues; Britaldo S. Soares-Filho

2013-01-01T23:59:59.000Z

234

Dependence of hydropower energy generation on forests in the Amazon Basin at local and regional scales  

Science Journals Connector (OSTI)

...given for the turbines and generators...Nations World Water Development Report 4: Managing...Greenhouse-gas emissions from...hydroelectric development of the Xingu River...Amazon hydropower development: Risk scenarios and environmental...life-cycle greenhouse gas (GHG) emissions...electric supply technologies. Energy 32:1543...

Claudia M. Stickler; Michael T. Coe; Marcos H. Costa; Daniel C. Nepstad; David G. McGrath; Livia C. P. Dias; Hermann O. Rodrigues; Britaldo S. Soares-Filho

2013-01-01T23:59:59.000Z

235

Trade-offs of Water Use for Hydropower Generation and Biofuel Production in the Zambezi Basin in Mozambique  

Science Journals Connector (OSTI)

Abstract In the Zambezi basin in Mozambique, hydropower production is an important economic resource, with substantial development envisaged for the next decades. Irrigated agriculture currently plays a minor role, but irrigation development has a large potential and is an important government policy goal, especially aiming at the cultivation of biofuel crops. This contribution assesses interrelations and trade-offs between these two water-dependent development options. Scenario simulations under different climate and development assumptions show that adverse impacts of irrigation withdrawal on hydropower are low. Consequently, the use of water for irrigated agriculture can generate higher economic benefits than the use for hydropower production.

Philipp Stanzel; Harald Kling; Kit Nicholson

2014-01-01T23:59:59.000Z

236

Vehicle Technologies Office Merit Review 2014: High Energy High Power Battery Exceeding PHEV-40 Requirements  

Energy.gov (U.S. Department of Energy (DOE))

Presentation given by [company name] at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high energy high power battery...

237

Digital Photonic Production: High Power ultrashort Lasers, Laser Additive Manufacturing and Laser Micro/ Nano Fabrication  

Science Journals Connector (OSTI)

The high power optical technologies enter a new era: The age of DIGITAL PHOTONIC PRODUCTION. Very recently new lasers in new time- and wavelength domains with high average powers have...

Poprawe, Reinhart; Gillner, Arnold; Hoffmann, Dieter; Kelbassa, Ingomar; Loosen, Peter; Wissenbach, Konrad

238

Cryogenic, high power, near diffraction limited, Yb:YAG slab laser  

Science Journals Connector (OSTI)

A cryogenic slab laser that is suitable for scaling to high power, while taking full advantage of the improved thermo-optical and thermo-mechanical properties of Yb:YAG at cryogenic...

Ganija, Miftar; Ottaway, David; Veitch, Peter; Munch, Jesper

2013-01-01T23:59:59.000Z

239

Statistical analysis and optimization of processing parameters in high-power direct diode laser cladding  

Science Journals Connector (OSTI)

High-power direct diode laser (HPDDL) offers a wide laser beam with a top-hat intensity distribution, ... making it an ideal tool for large-area cladding. In this study, a systemic study on the HPDDL cladding pro...

Shuang Liu; Radovan Kovacevic

2014-09-01T23:59:59.000Z

240

High Energy Density Sate, Material and Device with High Power Lasers  

Science Journals Connector (OSTI)

High energy density states with photon pressures of more than Tera bar and thermal pressure of more than Mega bar, is now available with high power lasers. Here I present creation of...

Kodama, R

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

3-Dimensional thermal analysis and active cooling of short-length high-power fiber lasers  

Science Journals Connector (OSTI)

A fully 3-dimensional finite element model has been developed that simulates the internal temperature distribution of short-length high-power fiber lasers. We have validated the...

Li, L; Li, H; Qiu, T; Temyanko, V L; Morrell, M M; Schülzgen, A; Mafi, A; Moloney, J V; Peyghambarian, N

2005-01-01T23:59:59.000Z

242

Cryogenic Intracavity Laser Cooling Using High Power Vertical External Cavity Surface Emitting Lasers (VECSELs)  

Science Journals Connector (OSTI)

A Yb:YLF crystal is laser cooled to 150 K from room temperature in an intracavity geometry using a high power InGaAs/GaAs MQW VECSEL operating at 1020 nm with <0.5 nm linewidth.

Ghasemkhani, Mohammadreza; Albrecht, Alexander R; Melgaard, Seth; Seletskiy, Denis V; Cederberg, Jeffrey G; Sheik-Bahae, Mansoor

243

Sapphire-conductive end-cooling of high power cryogenic Yb:YAG laser  

Science Journals Connector (OSTI)

We have demonstrated a high-power laser oscillator with end-cooling using a sapphire-sandwiched Yb:YAG disk at near liquid nitrogen temperature. An output power of 74 W with...

Tokita, Shigeki; Kawanaka, Junji; Izawa, Yasukazu; Fujita, Masayuki; Kawashima, Toshiyuki

244

Heating by Optical Absorption and Cooling of High Power Laser Mirrors  

Science Journals Connector (OSTI)

In high power laser system, laser mirror is the core and the most sensitive optical component, which influences the increase of laser power and the quality of laser. Absorption of light at mirrors causes wavef...

Ci-Ming Zhou; Zu-Hai Cheng; Yu-Feng Peng

2003-12-01T23:59:59.000Z

245

Sapphire-Conductive End-Cooling of High Power Cryogenic Yb:YAG Laser  

Science Journals Connector (OSTI)

We have demonstrated a high-power laser oscillator with end-cooling using a sapphire-sandwiched Yb:YAG disk at liquid nitrogen temperature. An output power of 74 W with...

Tokita, Shigeki; Fujita, Masayuki; Kawanaka, Junji; Kawashima, Toshiyuki; Izawa, Yasukazu

246

Ignition studies in support of the European High Power Laser Energy Research Facility project  

Science Journals Connector (OSTI)

The European High Power Laser Energy Research Facility (HiPER) project is ... of the fusion target mixing prior to thermonuclear ignition have been investigated using the 1D Lagrangian...Z ion species may inhibit...

J. Pasley

2010-11-01T23:59:59.000Z

247

The Role of the state in large-scale hydropower development perspectives from Chile, Ecuador, and Perú  

E-Print Network (OSTI)

In recent years, governments in South America have turned to large-scale hydropower as a cost-effective way to improve livelihoods while addressing the energy 'trilemma': ensuring that future energy technologies provide ...

Zambrano-Barragán, Patricio Xavier

2012-01-01T23:59:59.000Z

248

Correlation between the precipitation and energy production at hydropower plants to mitigate flooding in the Missouri River Basin  

E-Print Network (OSTI)

Currently, hydropower plants serve as one source of green energy for power companies. These plants are located in various geographical regions throughout the United States and can be split into three main classifications: ...

Foley, Rachel (Rachel L.)

2013-01-01T23:59:59.000Z

249

A 25 KV/10A PULSER FOR DRIVING A HIGH-POWER PIERCE ELECTRON GUN  

E-Print Network (OSTI)

A 25 KV/10A PULSER FOR DRIVING A HIGH-POWER PIERCE ELECTRON GUN J. J. Barroso, J. O. Rossi, H-tube pulser to drive a high-power electron gun. The tube includes a 2.0µF/100kV capacitor bank whose discharge is controlled by a tetrode tube connected to the gun cathode. Typical measured operating parameters are 3

250

Methods for enhancing the efficiency of creating a borehole using high power laser systems  

DOE Patents (OSTI)

Methods for utilizing 10 kW or more laser energy transmitted deep into the earth with the suppression of associated nonlinear phenomena to enhance the formation of Boreholes. Methods for the laser operations to reduce the critical path for forming a borehole in the earth. These methods can deliver high power laser energy down a deep borehole, while maintaining the high power to perform operations in such boreholes deep within the earth.

Zediker, Mark S.; Rinzler, Charles C.; Faircloth, Brian O.; Koblick, Yeshaya; Moxley, Joel F.

2014-06-24T23:59:59.000Z

251

Method and system for advancement of a borehole using a high power laser  

DOE Patents (OSTI)

There is provided a system, apparatus and methods for the laser drilling of a borehole in the earth. There is further provided with in the systems a means for delivering high power laser energy down a deep borehole, while maintaining the high power to advance such boreholes deep into the earth and at highly efficient advancement rates, a laser bottom hole assembly, and fluid directing techniques and assemblies for removing the displaced material from the borehole.

Moxley, Joel F.; Land, Mark S.; Rinzler, Charles C.; Faircloth, Brian O.; Zediker, Mark S.

2014-09-09T23:59:59.000Z

252

Project of Rotating Carbon High-Power Neutron Target. Research of Graphite Properties for Production of High Intensity Neutron Source  

E-Print Network (OSTI)

Project of Rotating Carbon High-Power Neutron Target. Research of Graphite Properties for Production of High Intensity Neutron Source

Gubin, K V; Bak, P A; Kot, N K; Logatchev, P V

2001-01-01T23:59:59.000Z

253

A calculation of the temperature of contact surfaces in a high-power discharge of electric current of commercial frequency  

Science Journals Connector (OSTI)

Thermal processes occuring at the surface of disconnected electric contacts subjected to a high-power electric arc are considered.

I. L. Shleifman

1970-05-01T23:59:59.000Z

254

Nice, Cte d'Azur, France, 27-29 September 2006 THERMAL MODELING OF HIGH POWER LED MODULES  

E-Print Network (OSTI)

Nice, Côte d'Azur, France, 27-29 September 2006 THERMAL MODELING OF HIGH POWER LED MODULES D a study of accuracy issues in thermal modeling of high power LED modules on system level. Both physical dynamics (CFD) model of a high power LED module model at a reference application condition, and to validate

Paris-Sud XI, Université de

255

High power single-crystal fiber CW 946 nm laser and blue generation based on Rubidium-doped PPKTP  

E-Print Network (OSTI)

for high power, continuous wave and polarized laser at 946 nm (fig1.c). We demonstrate a polarized laser. Laurell, "High-power, continous-wave, second harmonic generation at 532 nm in periodically poled KTiOPO4(b)(a) (c) High power single-crystal fiber CW 946 nm laser and blue generation based on Rubidium

Boyer, Edmond

256

Short-term electricity dispatch optimization of Ertan hydropower plant based on data by field tests  

Science Journals Connector (OSTI)

A short-term electricity dispatch optimization program required by the Ertan hydropower plant is developed to maximize hydropower production. Three field tests in various operating heads were carried out in the period of May 2009 to March 2010. Based on data of five test conditions three operating zones for units in various operating heads were proposed. A short-term electricity dispatch optimization model was developed with physical and operational constraints. Unit commitment strategy was put forward for model solution in which unit statuses and output statuses were classified. The strategy aimed at formulating better unit commitment plan according to forecasted load demand ancillary service requirements and initial operating status. The model and the strategy were verified by real cases. The results show that the optimal load distribution among units at every interval can be easily solved by the genetic algorithm based on a fixed unit commitment plan. Schedules are developed with higher average generation efficiency. Units can also be scheduled to operate for a less time within the rough zone and the second feasible zone. The proposed method is already operational for dispatch engineers of the Ertan hydropower plant to determine half-hourly schedules in one day.

Chao Ma; Haijun Wang; Jijian Lian

2011-01-01T23:59:59.000Z

257

Greenhouse Gas Emissions from U.S. Hydropower Reservoirs: FY2011 Annual Progress Report  

SciTech Connect

The primary objective of this study is to quantify the net emissions of key greenhouse gases (GHG) - notably, CO{sub 2} and CH{sub 4} - from hydropower reservoirs in moist temperate areas within the U.S. The rationale for this objective is straightforward: if net emissions of GHG can be determined, it would be possible to directly compare hydropower to other power-producing methods on a carbon-emissions basis. Studies of GHG emissions from hydropower reservoirs elsewhere suggest that net emissions can be moderately high in tropical areas. In such areas, warm temperatures and relatively high supply rates of labile organic matter can encourage high rates of decomposition, which (depending upon local conditions) can result in elevated releases of CO{sub 2} and CH{sub 4}. CO{sub 2} and CH{sub 4} emissions also tend to be higher for younger reservoirs than for older reservoirs, because vegetation and labile soil organic matter that is inundated when a reservoir is created can continue to decompose for several years (Galy-Lacaux et al. 1997, Barros et al. 2011). Water bodies located in climatically cooler areas, such as in boreal forests, could be expected to have lower net emissions of CO{sub 2} and CH{sub 4} because their organic carbon supplies tend to be relatively recalcitrant to microbial action and because cooler water temperatures are less conducive to decomposition.

Stewart, Arthur J [ORNL; Mosher, Jennifer J [ORNL; Mulholland, Patrick J [ORNL; Fortner, Allison M [ORNL; Phillips, Jana Randolph [ORNL; Bevelhimer, Mark S [ORNL

2012-05-01T23:59:59.000Z

258

Prediction of Total Dissolved Gas (TDG) at Hydropower Dams throughout the Columbia  

SciTech Connect

The network of dams throughout the Columbia River Basin (CRB) are managed for irrigation, hydropower production, flood control, navigation, and fish passage that frequently result in both voluntary and involuntary spillway releases. The entrainment of air in spillway releases and the subsequent exchange of atmospheric gasses into solution during passage through the stilling basin cause elevated levels of total dissolved gas (TDG) saturation. Physical processes that affect TDG exchange at hydropower facilities have been characterized throughout the CRB in site-specific studies and at real-time water quality monitoring stations. These data have been used to develop predictive models of TDG exchange which are site specific and account for the fate of spillway and powerhouse flows in the tailrace channel and resultant transport and exchange in route to the downstream dam. Currently, there exists a need to summarize the findings from operational and structural TDG abatement programs conducted throughout the CRB and for the development of a generalized prediction model that pools data collected at multiple projects with similar structural attributes. A generalized TDG exchange model can be tuned to specific projects and coupled with water regulation models to allow for the formulation of optimal water regulation schedules subject to water quality constraints for TDG supersaturation. It is proposed to develop a methodology for predicting TDG levels downstream of hydropower facilities with similar structural properties as a function of a set of variables that affect TDG exchange; such as tailwater depth, spill discharge and pattern, project head, and entrainment of powerhouse releases.

Pasha, MD Fayzul K [ORNL] [ORNL; Hadjerioua, Boualem [ORNL] [ORNL; Stewart, Kevin M [ORNL] [ORNL; Bender, Merlynn [Bureau of Reclamation] [Bureau of Reclamation; Schneider, Michael L. [U.S. Army Corps of Engineers] [U.S. Army Corps of Engineers

2012-01-01T23:59:59.000Z

259

Sustainable Reservoir Operation: Can we Generate Hydropower and Preserve Ecosystem Values?  

SciTech Connect

Hydroelectric power provides a cheap source of electricity with few carbon emissions. Yet, reservoirs are not operated sustainably, which we define as meeting societal needs for water and power while protecting long-term health of the river ecosystem. Reservoirs that generate hydropower are typically operated with the goal of maximizing energy revenue, while meeting other legal water requirements. Reservoir optimization schemes used in practice do not seek flow regimes that maximize aquatic ecosystem health. Here, we review optimization studies that considered environmental goals in one of three approaches. The first approach seeks flow regimes that maximize hydropower generations while satisfying legal requirements, including environmental (or minimum) flows. Solutions from this approach are often used in practice to operate hydropower projects. In the second approach, flow releases from a dam are timed to meet water quality constraints on dissolved oxygen (DO), temperature and nutrients. In the third approach, flow releases are timed to improve the health of fish populations. We conclude by suggesting three steps for bringing multi-objective reservoir operation closer to the goal of ecological sustainability: (1) conduct research to identify which features of flow variation are essential for river health and to quantify these relationships, (2) develop valuation methods to assess the total value of river health and (3) develop optimal control softwares that combine water balance modeling with models that predict ecosystem responses to flow.

Jager, Yetta [ORNL; Smith, Brennan T [ORNL

2008-01-01T23:59:59.000Z

260

Pumped Storage Hydropower (Project Development Support)—Geotechnical Investigation and Value Stream Analysis for the Iowa Hill Pumped-Storage Development  

Energy.gov (U.S. Department of Energy (DOE))

Pumped Storage Hydropower (Project Development Support)—Geotechnical Investigation and Value Stream Analysis for the Iowa Hill Pumped-Storage Development

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

High power  

Science Journals Connector (OSTI)

... 1970s technomanic projects such as nuclear power stations were still in vogue. Environmentalists argued that solar power seemed a far safer, cheaper and reassuringly low-tech power source. The technomaniacs ... tech power source. The technomaniacs, fearing that they were losingthis argument, sought to hijack solar power themselves. They proposed an enormously expensive and complicated ...

David Jones

1994-03-03T23:59:59.000Z

262

High-Power Electrodes for Lithium-Ion Batteries | U.S. DOE Office of  

Office of Science (SC) Website

High-Power Electrodes for Lithium-Ion High-Power Electrodes for Lithium-Ion Batteries Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights Highlight Archives News & Events Publications Contact BES Home 04.27.12 High-Power Electrodes for Lithium-Ion Batteries Print Text Size: A A A RSS Feeds FeedbackShare Page Scientific Achievement For novel 3-D anodes made of sheets of carbon (graphene) and silicon nanoparticles, transport studies found much shorter lithium diffusion paths throughout the electrode and fast lithiation/delithiation of the nanoparticles. Significance and Impact This anode design holds a greater charge than conventional lithium-ion anodes and charges/discharges more rapidly while maintaining mechanical stability. Research Details Electrochemical studies: 83% of theoretical capacity (3200 mAh g-1)

263

FY2001 Highlights Report for the Vehicle High-Power Energy Storage Program  

NLE Websites -- All DOE Office Websites (Extended Search)

HIGH-POWER HIGH-POWER ENERGY STORAGE 2 0 0 1 A N N U A L P R O G R E S S R E P O R T U.S. Department of Energy Energy Efficiency and Renewable Energy Office of Transportation Technologies A C K N O W L E D G E M E N T We would like to express our sincere appreciation to Argonne National Laboratory and to Sentech, Inc., for their artistic and technical contributions in preparing and publishing this report. In addition, we would like to thank all our program participants for their contributions to the programs and all the authors who prepared the project abstracts that comprise this report. U.S. Department of Energy Office of Advanced Automotive Technologies 1000 Independence Ave., S.W. Washington, DC 20585-0121 FY 2001 Highlights Report for the Vehicle High-Power Energy Storage Program Energy Efficiency and Renewable Energy

264

Space reactor/Stirling cycle systems for high power Lunar applications  

SciTech Connect

NASA`s Space Exploration Initiative (SEI) has proposed the use of high power nuclear power systems on the lunar surface as a necessary alternative to solar power. Because of the long lunar night ({approximately} 14 earth days) solar powered systems with the requisite energy storage in the form of regenerative fuel cells or batteries becomes prohibitively heavy at high power levels ({approximately} 100 kWe). At these high power levels nuclear power systems become an enabling technology for variety of missions. One way of producing power on the lunar surface is with an SP-100 class reactor coupled with Stirling power converters. In this study, analysis and characterization of the SP-100 class reactor coupled with Free Piston Stirling Power Conversion (FPSPC) system will be performed. Comparison of results with previous studies of other systems, particularly Brayton and Thermionic, are made.

Schmitz, P.D. [Sverdrup Technology, Inc., Brook Park, OH (United States). Lewis Research Center Group; Mason, L.S. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center

1994-09-01T23:59:59.000Z

265

High power x-ray welding of metal-matrix composites  

DOE Patents (OSTI)

A method for joining metal-matrix composites (MMCs) by using high power x-rays as a volumetric heat source is provided. The method involves directing an x-ray to the weld line between two adjacent MMCs materials to create an irradiated region or melt zone. The x-rays have a power density greater than about 10.sup.4 watts/cm.sup.2 and provide the volumetric heat required to join the MMC materials. Importantly, the reinforcing material of the metal-matrix composites remains uniformly distributed in the melt zone, and the strength of the MMCs are not diminished. In an alternate embodiment, high power x-rays are used to provide the volumetric heat required to weld metal elements, including metal elements comprised of metal alloys. In an alternate embodiment, high power x-rays are used to provide the volumetric heat required to weld metal elements, including metal elements comprised of metal alloys.

Rosenberg, Richard A. (Naperville, IL); Goeppner, George A. (Orland Park, IL); Noonan, John R. (Naperville, IL); Farrell, William J. (Flossmoor, IL); Ma, Qing (Westmont, IL)

1999-01-01T23:59:59.000Z

266

POST-IRRADIATION PROPERTIES OF CANDIDATE MATERIALS FOR HIGH POWER TARGETS  

E-Print Network (OSTI)

POST-IRRADIATION PROPERTIES OF CANDIDATE MATERIALS FOR HIGH POWER TARGETS H. Kirk, N. Simos, P Diffusivity Resistivity Thermal Expansion (CTE) Integrated Effects Shock absorption Is Carbon CTE composite that may potentially minimize thermal shock and survive high intensity pulses. Graphite

McDonald, Kirk

267

Mats Lindroos, Cristina Oyon and Stevey OECD "A High Power Spallation Source in each Global Region"  

E-Print Network (OSTI)

ESS Mats Lindroos, Cristina Oyon and Stevey Peggs #12;ESS 2 #12;OECD "A High Power Spallation Source in each Global Region" SNS Oak Ridge J-PARC Tokai ESS in Lund #12;ESS: Site selection process · ESS high up on the ESFRI list Th ti biddi f th it (Bilb L d d· Three consortia bidding for the site

McDonald, Kirk

268

Analytical models of transient thermoelastic deformations of mirrors heated by high power cw laser beams  

E-Print Network (OSTI)

and are suspended in a vacuum vessel : the heat losses are only due to the thermal radiation. The resulting2243 Analytical models of transient thermoelastic deformations of mirrors heated by high power cw substrat. La distribution de température engendrée dans le substrat produit des déformations

Boyer, Edmond

269

Diagnostic Characterization of High-Power Lithium-Ion Batteries For Use in Hybrid Electric Vehicles  

E-Print Network (OSTI)

Diagnostic Characterization of High-Power Lithium-Ion Batteries For Use in Hybrid Electric Vehicles and electric vehicles due to their relatively high specific energy and specific power. The Advanced Technology of lithium-ion batteries for hybrid electric vehicle (HEV) applications. The ATD Program is a joint effort

270

Diagnostic Characterization of High Power Lithium-Ion Batteries for Use in Hybrid Electric Vehicles  

E-Print Network (OSTI)

Diagnostic Characterization of High Power Lithium-Ion Batteries for Use in Hybrid Electric Vehicles are a fast-growing technology that is attrac- tive for use in portable electronics and electric vehicles due electric vehicle HEV applications.c A baseline cell chemistry was identified as a carbon anode negative

271

High-Power InP-based Waveguide Photodiodes and Photodiode Arrays Heterogeneously Integrated on SOI  

E-Print Network (OSTI)

High-Power InP-based Waveguide Photodiodes and Photodiode Arrays Heterogeneously Integrated on SOI evanescently-coupled modified uni-traveling carrier photodiodes (MUTC PDs) on silicon-on-insulator (SOI on silicon is a promising approach to realize high-performance photodiodes on a silicon photonics platform

Bowers, John

272

Research on Control System of High Power DFIG Wind Power System  

Science Journals Connector (OSTI)

Compared with constant speed constant frequency wind turbine, variable speed constant frequency wind turbine has many advantages: higher efficiency of wind energy converting to electric power, absorbing gust energy, smoothly cutting into the network ... Keywords: wind power, DFIG, high power, LQR, variable speed constant frequency, constant power control

Li Jianlin; Xu Honghua

2008-12-01T23:59:59.000Z

273

Current spread and overheating of high power laser bars B. Laikhtmana)  

E-Print Network (OSTI)

-power lasers, the width of the stripe is much larger than the cladding thick- ness, and the substrate thicknessCurrent spread and overheating of high power laser bars B. Laikhtmana) Power Photonic, 214 Old 11794 Received 27 May 2003; accepted 12 January 2004 The heating of a semiconductor laser bar imbedded

274

High power, continuous-wave ytterbium-doped fiber laser tunable from 976 to 1120 nm  

E-Print Network (OSTI)

narrow linewidth double-clad fiber ring laser," Opt. Express 10(2), 139­144 (2002). 6. A. Silva, K. J. Paschotta, A. C. Tropper, and D. C. Hanna, "Ring-doped cladding-pumped single- mode three-level fiber laser, and T. Thomas, "Efficient high power Yb3þ-silica fibre laser cladding-pumped at 1064 nm," Opt. Commun

Paris-Sud XI, Université de

275

Cree's High-Power White LED Delivers 121 lm/W  

Energy.gov (U.S. Department of Energy (DOE))

Cree's commercial high-power white LEDs can now deliver 121 lm/W at 35A/cm2 current density. These particular Cree XLamp® XP-G LEDs deliver 267 lumens at a drive current of 700 mA and an operating...

276

High-power Er:YAG laser for coherent laser radar  

Science Journals Connector (OSTI)

We report the development of a high-power Er:YAG laser with high pulse energy for coherent lidar wind sensing. The 1.645 um Er:YAG laser produced a Q-switched pulse energy of 16 mJ...

Stoneman, Robert C; Malm, Andrew I R

277

High Power Impulse Magnetron Sputtering deposition of Pt inside fuel cell electrodes  

E-Print Network (OSTI)

1 High Power Impulse Magnetron Sputtering deposition of Pt inside fuel cell electrodes S Cuynet1 as a cathode of a proton exchange membrane fuel cell. An increase of 80 % at 0.65 V of the PEMFC power density) 272001" #12;2 Proton exchange membrane fuel cells (PEMFC) have the potential to provide

Paris-Sud XI, Université de

278

Advanced High Energy and High Power Battery Systems for Automotive Applications Khalil Amine  

E-Print Network (OSTI)

Geothermal 2.5 Wind 0.22 Solar 0.02 Coal 110 Natural Gas 107 Residential 50 Vehicle 39 Freight 40 Air 129.30am Advanced High Energy and High Power Battery Systems for Automotive Applications Khalil Amine electric drive Plug in Hybrid Electric Vehicle (P-HEVs), long range electric vehi cle (EV) and sm art grid

Levi, Anthony F. J.

279

High-power parametric conversion from near-infrared to short-wave infrared  

E-Print Network (OSTI)

High-power parametric conversion from near-infrared to short-wave infrared Adrien Billat,1,* Steevy.billat@epfl.ch Abstract: We report the design of an all-fiber continuous wave Short-Wave Infrared source capable to output.4370) Nonlinear optics, fibers; (140.3070) Infrared and far-infrared lasers. References and links 1. M. N

Dalang, Robert C.

280

OPTICAL DIAGNOSTIC RESULTS FROM THE MERIT HIGH-POWER TARGET EXPERIMENT  

E-Print Network (OSTI)

to accept proton beams with multi-megawatt beam power. The core of this proposed target system consists, and the possible effect of that disruption on the mercury containment system. The MERIT experiment was designedOPTICAL DIAGNOSTIC RESULTS FROM THE MERIT HIGH-POWER TARGET EXPERIMENT H.G. Kirk , H. Park, T

McDonald, Kirk

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Generation of Alfven waves by high power pulse at the electron plasma frequency  

E-Print Network (OSTI)

Generation of Alfve´n waves by high power pulse at the electron plasma frequency B. Van CompernolleG, Helium) capable of supporting Alfve´n waves has been studied. The interaction leads to the generation locations. Citation: Van Compernolle, B., W. Gekelman, P. Pribyl, and T. A. Carter (2005), Generation

California at Los Angles, University of

282

Sustainable development of hydropower in third countries: The development of hydropower on a sustainable basis has been an array of humanitarian and economic development, especially for local people as well as an important tool in the fight against glo  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

FACT SHEET: SUSTAINABLE DEVELOPMENT OF HYDROPOWER INITIATIVE At the Clean Energy Ministerial in Washington, D.C. on July 19 th and 20 th , ministers pledged to establish the Sustainable Development of Hydropower Initiative to promote the sustainable use of hydropower in developing countries in regions such as Africa, Asia, and Central America, and to identify potential financial resources from multilateral organizations to advance such projects.

283

Quantitative Evaluation of Bulk and Interface Microstructures in Al-3003 Alloy Builds Made by Very High Power Ultrasonic Additive Manufacturing  

Science Journals Connector (OSTI)

Ultrasonically consolidated 3003 aluminum alloy builds were prepared with constituent tapes by using a very high power ultrasonic additive manufacturing (UAM) process. Microstructures of interface and...

Hiromichi T. Fujii; M. R. Sriraman…

2011-12-01T23:59:59.000Z

284

Performance scaling of high-power picosecond cryogenically cooled rod-type Yb:YAG multipass amplification  

Science Journals Connector (OSTI)

The performance scaling of high-power picosecond cryogenically cooled rod-type Yb:YAG multipass amplification is studied numerically, taking into account diffraction, dispersion,...

Fu, Xing; Hong, Kyung-Han; Chen, Li-Jin; Kärtner, Franz X

2013-01-01T23:59:59.000Z

285

Durability of Low Pt Fuel Cells Operating at High Power Density  

NLE Websites -- All DOE Office Websites (Extended Search)

SPIRE Program Kickoff SPIRE Program Kickoff Topic 3A. Cell Degradation Studies / Degradation Studies Durability of Low Pt Fuel Cells Operating at High Power Density US DOE Fuel Cell Projects Kickoff Meeting DOE Award: DE-EE0000469 October 1 st , 2009 Program Objectives The objective of this program is to study and identify strategies to assure durability of fuel cells designed to meet DOE cost targets. Technical Barriers Barrier Approach Strategy A. Durability Reinforced, Stabilized Membrane MEA Partner Durability-Enhanced Electrodes Electrocatalyst/MEA Partner Optimized Operating Conditions Parametric model & experimental studies B. Cost Low Pt Loadings (0.2 mg/cm 2 ) Electrocatalyst/MEA Partner High Power Density (>1.0W/cm 2 ) Open Flowfield Stack Metallic Stack Architecture Incumbent Derivative

286

PPPL delivers a plasma source that will enable high-power beam pulses in a  

NLE Websites -- All DOE Office Websites (Extended Search)

delivers a plasma source that will enable high-power beam pulses in a delivers a plasma source that will enable high-power beam pulses in a new Berkeley Lab accelerator March 19, 2012 Tweet Widget Facebook Like Google Plus One Erik Gilson with a copper-clad module and chamber for testing the units. (Photo by Elle Starkman, PPPL Office of Communications) Erik Gilson with a copper-clad module and chamber for testing the units. Gallery: Interior views of a plasma-source module. (Photo by Elle Starkman, PPPL Office of Communications) Interior views of a plasma-source module. Technician aligns plasma source with NDCX-II accelerator in background. (Photo by Elle Starkman, PPPL Office of Communications) Technician aligns plasma source with NDCX-II accelerator in background. Plainsboro, New Jersey - Scientists at the U.S. Department of Energy's

287

Design of a High Power Continuous Source of Broadband Down-Converted Light  

E-Print Network (OSTI)

We present the design and experimental proof of principle of a low threshold optical parametric oscillator (OPO) that continuously oscillates over a large bandwidth allowed by phase matching. The large oscillation bandwidth is achieved with a selective two-photon loss that suppresses the inherent mode competition, which tends to narrow the bandwidth in conventional OPOs. Our design performs pairwise mode-locking of many frequency pairs, in direct equivalence to passive mode-locking of ultrashort pulsed lasers. The ability to obtain high powers of continuous \\textit{and} broadband down-converted light enables the optimal exploitation of the correlations within the down-converted spectrum, thereby strongly affecting two-photon interactions even at classically high power levels, and opening new venues for applications such as two-photon spectroscopy and microscopy and optical spread spectrum communication.

Avi Pe'er; Yaron Silberberg; Barak Dayan; Asher A. Friesem

2006-08-29T23:59:59.000Z

288

TRANSFORMATIONAL LEADERSHIP AND ALTRUISM: ROLE OF POWER DISTANCE IN A HIGH POWER DISTANCE CULTURE  

E-Print Network (OSTI)

Using a sample of 105 manager-subordinate dyads from a high power distance culture, the effects of power distance and transformational leadership on follower altruism were studied. Findings show a significant positive relationship between power distance and transformational leadership and between transformational leadership and follower altruism. The dimensions on which cultures differ have been identified earlier (Hofstede, 1980). The objective of this study is to look at the effect of a dimension on other variables, in a culture that is high on that dimension. Our contention is that in cultures that score high on the power distance dimension of Hofstede (1980) model, if managers maintain a high power distance between themselves and their followers, their transformational leadership would be enhanced, and transformational leadership in turn will enhance altruistic behavior of followers. Merely knowing the dimensions on which cultures differ is not enough. That knowledge has to be used to predict how an alignment with that dimension would affect other variables.

Ankush Punj; Venkat R. Krishnan

289

Collective Thomson scattering of a high power electron cyclotron resonance heating beam in LHD (invited)  

SciTech Connect

Collective Thomson scattering (CTS) system has been constructed at LHD making use of the high power electron cyclotron resonance heating (ECRH) system in Large Helical Device (LHD). The necessary features for CTS, high power probing beams and receiving beams, both with well defined Gaussian profile and with the fine controllability, are endowed in the ECRH system. The 32 channel radiometer with sharp notch filter at the front end is attached to the ECRH system transmission line as a CTS receiver. The validation of the CTS signal is performed by scanning the scattering volume. A new method to separate the CTS signal from background electron cyclotron emission is developed and applied to derive the bulk and high energy ion components for several combinations of neutral beam heated plasmas.

Kubo, S.; Nishiura, M.; Tanaka, K.; Shimozuma, T.; Yoshimura, Y.; Igami, H.; Takahash, H.; Mutoh, T. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, 509-5292 Gifu (Japan); Tamura, N. [Department of Energy Science and Technology, Nagoya University, Nagoya 464-8463 (Japan); Tatematsu, Y.; Saito, T. [Research Center for Development of FIR Region, University of Fukui, Fukui 910-8507 (Japan); Notake, T. [Tera-Photonics Lab., RIKEN, Sendai 980-0845 (Japan); Korsholm, S. B.; Meo, F.; Nielsen, S. K.; Salewski, M.; Stejner, M. [Association EURATOM-Risoe DTU, P.O. Box 49, DK-4000 Roskilde (Denmark)

2010-10-15T23:59:59.000Z

290

Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms  

E-Print Network (OSTI)

We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system, which does not depend on complex nonlinear frequency-doubling, has great importance for implementing transportable optical lattice clocks, and is also useful for investigations on condensed matter physics or quantum information processing using cold atoms.

Toshiyuki Hosoya; Martin Miranda; Ryotaro Inoue; Mikio Kozuma

2014-12-02T23:59:59.000Z

291

Thermal evaluation and performance of high-power Lithium-ion cells  

SciTech Connect

Under the sponsorship of the US Advanced Battery Consortium (USABC) and the Partnership for a New Generation of Vehicles (PNGV), Saft has developed high-power lithium-ion (Li-Ion) batteries for hybrid electric vehicles (HEVs). These high-power Li-Ion batteries are being evaluated for the US Department of Energy's (DOE) Hybrid Vehicle Propulsion Program. As part of this program, the National Renewable Energy Laboratory (NREL) characterized the thermal performance of the Saft (6-Ah) Li-Ion cells. The characterization included (1) obtaining thermal images of cells under a specified cycle, (2) measuring heat generation from the cells at various temperatures and under various charge/discharge profiles, and (3) determining the cells' capabilities for following a simulated power profile (driving cycle) at various initial states of charge and temperatures.

Keyser, M.; Pesaran, A.; Oweis, S.; Chagnon, G.; Ashtiani, C.

2000-01-25T23:59:59.000Z

292

Sustainability suspense of small hydropower projects: A study from western Himalayan region of India  

Science Journals Connector (OSTI)

Abstract Small hydropower projects (SHPs), though generally considered more environmentally benign and socially acceptable as compared to large projects, yet their overall sustainability is under suspicion in the Himalayan regions. Almost all \\{SHPs\\} in this region are being developed as run of the river mode which generally causes less/no submergence and quite less displacement of people as compared to large reservoir based hydropower production mode. However, in the absence of proper planning and monitoring mechanism, these projects are causing implacable tunnelling of hills, choking of streams, conversion of streams into dry ditches and long term socio-environmental impacts. This paper presents a SHP development study from hydro rich Beas river basin of Himachal Pradesh, a state nestled in western Himalayan region of India. In depth field studies, focus group discussions with the project affected people and interaction with project proponents of five \\{SHPs\\} in this region suggest that sustainability issues with respect to \\{SHPs\\} are not small vis-a-vis size of their installed capacity. There is an urgent need to take steps to include \\{SHPs\\} having an installed capacity of above 10 MW into the ambit of environment clearance process which is absent in many countries of the world at present.

Deepak Kumar; S.S. Katoch

2015-01-01T23:59:59.000Z

293

Investigation of the delay time distribution of high power microwave surface flashover  

SciTech Connect

Characterizing and modeling the statistics associated with the initiation of gas breakdown has proven to be difficult due to a variety of rather unexplored phenomena involved. Experimental conditions for high power microwave window breakdown for pressures on the order of 100 to several 100 torr are complex: there are little to no naturally occurring free electrons in the breakdown region. The initial electron generation rate, from an external source, for example, is time dependent and so is the charge carrier amplification in the increasing radio frequency (RF) field amplitude with a rise time of 50 ns, which can be on the same order as the breakdown delay time. The probability of reaching a critical electron density within a given time period is composed of the statistical waiting time for the appearance of initiating electrons in the high-field region and the build-up of an avalanche with an inherent statistical distribution of the electron number. High power microwave breakdown and its delay time is of critical importance, since it limits the transmission through necessary windows, especially for high power, high altitude, low pressure applications. The delay time distribution of pulsed high power microwave surface flashover has been examined for nitrogen and argon as test gases for pressures ranging from 60 to 400 torr, with and without external UV illumination. A model has been developed for predicting the discharge delay time for these conditions. The results provide indications that field induced electron generation, other than standard field emission, plays a dominant role, which might be valid for other gas discharge types as well.

Foster, J.; Krompholz, H.; Neuber, A. [Department of Electrical and Computer Engineering, Center for Pulsed Power and Power Electronics, Texas Tech University, Lubbock, Texas 79409-3102 (United States)

2011-01-15T23:59:59.000Z

294

Temperature-Dependent Battery Models for High-Power Lithium-Ion Batteries  

SciTech Connect

In this study, two battery models for a high-power lithium ion (Li-Ion) cell were compared for their use in hybrid electric vehicle simulations in support of the U.S. Department of Energy's Hybrid Electric Vehicle Program. Saft America developed the high-power Li-Ion cells as part of the U.S. Advanced Battery Consortium/U.S. Partnership for a New Generation of Vehicles programs. Based on test data, the National Renewable Energy Laboratory (NREL) developed a resistive equivalent circuit battery model for comparison with a 2-capacitance battery model from Saft. The Advanced Vehicle Simulator (ADVISOR) was used to compare the predictions of the two models over two different power cycles. The two models were also compared to and validated with experimental data for a US06 driving cycle. The experimental voltages on the US06 power cycle fell between the NREL resistive model and Saft capacitance model predictions. Generally, the predictions of the two models were reasonably close to th e experimental results; the capacitance model showed slightly better performance. Both battery models of high-power Li-Ion cells could be used in ADVISOR with confidence as accurate battery behavior is maintained during vehicle simulations.

Johnson, V.H.; Pesaran, A.A. (National Renewable Energy Laboratory); Sack, T. (Saft America)

2001-01-10T23:59:59.000Z

295

Deposition of Pt inside fuel cell electrodes using high power impulse magnetron sputtering  

Science Journals Connector (OSTI)

The high power impulse magnetron sputtering (HiPIMS) process is used to incorporate catalytic nanoclusters of platinum into microporous carbon. Such a process leads to an enhancement of the Pt species' penetration into the porous medium, as evidenced by Rutherford backscattering spectroscopy analysis. Each sample of catalyzed porous carbon is tested as a cathode of a proton exchange membrane fuel cell (PEMFC). An increase of 80% at 0.65 V of the PEMFC power density for a low catalyst loading of 0.02 mg cm?2 highlights the use of the HiPIMS process versus the conventional dc magnetron sputtering process.

S Cuynet; A Caillard; T Lecas; J Bigarré; P Buvat; P Brault

2014-01-01T23:59:59.000Z

296

A novel high power density permanent magnet variable-speed motor  

SciTech Connect

This paper proposes a novel polyphase multipole permanent magnet motor which possesses high power density, high efficiency and excellent controllability, yet can be produced by conventional fabrication technique. The basic operating principles, design features, performance analysis and control system are described. The experimental results of a 5 kW, 1,500 rpm prototype motor and its comparison with other types of motors such as switched reluctance motor and induction motor are given. This proposed motor has the potential to compete in certain applications.

Chan, C.C.; Chen, G.H.; Jiang, J.Z.; Wang, X.Y. (Univ. of Hong Kong (Hong Kong))

1993-06-01T23:59:59.000Z

297

Modeling of dimmable High Power LED illumination distribution using ANFIS on the isolated area  

Science Journals Connector (OSTI)

High power light emitting diodes (HP-LEDs) are more suitable for energy saving applications and have becoming replacing traditional fluorescent and incandescent bulbs for its energy efficient. Therefore, HP-LED lighting has been regarded in the next-generation lighting. In this study, illumination distribution of white color HP-LED is modeled by adaptive neuro-fuzzy inference system (ANFIS) approach on the isolated area while LED head is fixed. Subtractive clustering with hybrid learning approach is used to train the realized ANFIS architectures. End of the numerous experiment we finally concluded that, ANFIS could be used to modeling the illumination distribution applications perfectly.

?smail Kiyak; Vedat Topuz; Bülent Oral

2011-01-01T23:59:59.000Z

298

Note: Efficient generation of optical sidebands at GHz with a high-power tapered amplifier  

SciTech Connect

Two methods using a laser-diode tapered amplifier to produce high-power, high-efficiency optical frequency sidebands over a wide tunable frequency range are studied and compared. For a total output of 500 mW at 811 nm, 20% of the power can be placed in each of the first-order sidebands. Functionality and characterization are presented within the sideband frequency region of 0.8–2.3 GHz, and it is shown that both methods can be applied beyond this frequency range. These methods provide a versatile and effective tool for atomic physics experiments.

Zappala, J. C.; Lu, Z.-T. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States) [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States); Bailey, K.; O’Connor, T. P.; Jiang, W., E-mail: wjiang@phy.anl.gov [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2014-04-15T23:59:59.000Z

299

Microwave power thin film resistors for high frequency and high power load applications  

Science Journals Connector (OSTI)

The authors report a power-dividing-based microwave power thin film resistor (MPTFR) that exhibits high operating frequency and high power load. The MPTFR is comprised of substrate ground electrodes two TaN resistive films power dividing circuit and signal input port. The experimental results show that the voltage standing wave ratio of the MPTFR is lower than 1.6 in the band of 3.4–7.4 GHz and 8.2–9.8 GHz. The power load of the MPTFR is 200 W. The experimental data are in good agreement with the electromagnetic simulations.

H. C. Jiang; X. Si; W. L. Zhang; C. J. Wang; B. Peng; Y. R. Li

2010-01-01T23:59:59.000Z

300

Diversion assumptions for high-powered research reactors. ISPO C-50 Phase 1  

SciTech Connect

This study deals with diversion assumptions for high-powered research reactors -- specifically, MTR fuel; pool- or tank-type research reactors with light-water moderator; and water, beryllium, or graphite reflectors, and which have a power level of 25 MW(t) or more. The objective is to provide assistance to the IAEA in documentation of criteria and inspection observables related to undeclared plutonium production in the reactors described above, including: criteria for undeclared plutonium production, necessary design information for implementation of these criteria, verification guidelines including neutron physics and heat transfer, and safeguards measures to facilitate the detection of undeclared plutonium production at large research reactors.

Binford, F.T.

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

High Power, High Voltage FETs in Linear Applications: A User's Perspective  

SciTech Connect

The specifications of the current crop of highpower, high-voltage field-effect transistors (FETs) can lure a designer into employing them in high-voltage DC equipment. Devices with extremely low on-resistance and very high power ratings are available from several manufacturers. However, our experience shows that high-voltage, linear operation of these devices at near-continuous duty can present difficult reliability challenges at stress levels well-below their published specifications. This paper chronicles the design evolution of a 600 volt, 8 ampere shunt regulator for use with megawatt-class radio transmitters, and presents a final design that has met its reliability criteria.

N. Greenough, E. Fredd, S. DePasquale

2009-09-21T23:59:59.000Z

302

Spectroscopic imaging of self-organization in high power impulse magnetron sputtering plasmas  

SciTech Connect

Excitation and ionization conditions in traveling ionization zones of high power impulse magnetron sputtering plasmas were investigated using fast camera imaging through interference filters. The images, taken in end-on and side-on views using light of selected gas and target atom and ion spectral lines, suggest that ionization zones are regions of enhanced densities of electrons, and excited atoms and ions. Excited atoms and ions of the target material (Al) are strongly concentrated near the target surface. Images from the highest excitation energies exhibit the most localized regions, suggesting localized Ohmic heating consistent with double layer formation.

Andersson, Joakim [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States) [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States); Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore (Singapore); Ni, Pavel; Anders, André [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States)] [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States)

2013-07-29T23:59:59.000Z

303

The capacitively coupled converter (C³) for high power DC-DC conversion  

E-Print Network (OSTI)

5 11 12 14 17 17 25 26 27 29 29 42 45 48 48 51 51 CHAPTER VI ANALYSIS OF C' USING S. SPACEAVERAGING . . The General Converter. . . The C Coupling Capacitor Voltage VI S~RY AND CONCLUSION . Suitability for High Power... signal transient for flyback capacitor voltageVci for special case of starting with fixed D, fixed T, and lower voltage threshold over-ride . . . . 52 5-3 Large signal transient for input inductor current for example in figure 5-2 . 53 5-4 Large signal...

Khan, Shahriar

2012-06-07T23:59:59.000Z

304

Microsoft PowerPoint - Hydropower conf SDOX June 2008 final [Compatibility Mode]  

NLE Websites -- All DOE Office Websites (Extended Search)

Supersaturated Dissolved Oxygen (SDOX(tm)) Supersaturated Dissolved Oxygen (SDOX(tm)) Delivery Technology at Norfork Dam Delivery Technology at Norfork Dam Scott Osborn Chief Technology Officer Scott Osborn, Chief Technology Officer Clay Thompson, Senior Engineer Southwestern Federal Hydropower Conference June 12, 2008 BlueInGreen, LLC 535 W. Research Blvd. Fayetteville, AR 72701 (479) 527 6378 , (479) 527-6378 Background Background  Thanks to Marshall Boyken, Southwestern Power Administration Tulsa for inviting us and setting this up Administration, Tulsa for inviting us and setting this up.  The original presentation is from a meeting concerning low DO at Norfork Dam in Arkansas and how BlueInGreen's technology can address this problem.  Norfork River (tailrace) is 303(d) listed for low DO, feeds Norfork National

305

File:Federal Hydropower - U.S. Geological Survey.pdf | Open Energy  

Open Energy Info (EERE)

Survey.pdf Survey.pdf Jump to: navigation, search File File history File usage Metadata File:Federal Hydropower - U.S. Geological Survey.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 794 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:41, 22 May 2013 Thumbnail for version as of 15:41, 22 May 2013 1,275 × 1,650, 2 pages (794 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage The following page links to this file:

306

File:Federal Hydropower - Western Area Power Administration.pdf | Open  

Open Energy Info (EERE)

Western Area Power Administration.pdf Western Area Power Administration.pdf Jump to: navigation, search File File history File usage Metadata File:Federal Hydropower - Western Area Power Administration.pdf Size of this preview: 466 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,305 × 1,680 pixels, file size: 715 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:42, 22 May 2013 Thumbnail for version as of 15:42, 22 May 2013 1,305 × 1,680, 2 pages (715 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage The following page links to this file:

307

Design and Implementation of a new Autonomous Sensor Fish to Support Advanced Hydropower Development  

SciTech Connect

Acceleration in development of additional conventional hydropower requires tools and methods to perform laboratory and in-field validation of turbine performance and fish passage claims. The new-generation Sensor Fish has been developed with more capabilities to accommodate a wider range of users over a wider range of turbine designs and operating environments. It provides in situ measurements of three dimensional (3D) accelerations, 3D rotational velocities, 3D orientation, pressure, and temperature at a sampling frequency of 2048 Hz. It also has an automatic floatation system and built-in radio frequency transmitter for recovery. The relative errors of the pressure, acceleration and rotational velocity were within ±2%, ±5%, and ±5%, respectively. The accuracy of orientation was within ±4° and accuracy of temperature was ±2°C. It is being deployed to evaluate the biological effects of turbines or other hydraulic structures in several countries.

Deng, Zhiqun; Lu, Jun; Myjak, Mitchell J.; Martinez, Jayson J.; Tian, Chuan; Morris, Scott J.; Carlson, Thomas J.; Zhou, Da; Hou, Hongfei

2014-11-04T23:59:59.000Z

308

New Small Hydropower Technology to be Deployed in the United States  

SciTech Connect

Earth By Design Inc, (EBD), in collaboration with Oak Ridge National Laboratory (ORNL), Knight Pi sold and Co., and CleanPower AS, has responded to a Funding Opportunity Announcement (FOA) published by the Department of Energy (DOE) in April 2011. EBD submitted a proposal to install an innovative, small hydropower technology, the Turbinator, a Norwegian technology from CleanPower. The Turbinator combines an axial flow, fixed-blade Kaplan turbine and generator in a compact and sealed machine. This makes it a very simple and easy technology to be deployed and installed. DOE has awarded funding for this two-year project that will be implemented in Culver, Oregon. ORNL with the collaboration of CleanPower, will assess and evaluate the technology before and during the manufacturing phase and produce a full report to DOE. The goal of this phase-one report is to provide DOE Head Quarters (HQ), water power program management, a report with findings about the performance, readiness, capability, strengths and weakness, limitation of the technology, and potential full-scale deployment and application in the United States. Because of the importance of this information to the conventional hydropower industry and regulators, preliminary results will rapidly be distributed in the form of conference presentations, ORNL/DOE technical reports (publically available online, and publications in the peer-reviewed, scientific literature. These reports will emphasize the relevance of the activities carried out over the two-year study (i.e., performance, robustness, capabilities, reliability, and cost of the Turbinator). A final report will be submitted to a peer-reviewed publication that conveys the experimental findings and discusses their implications for the Turbinator application and implementation. Phase-two of the project consists of deployment, construction, and project operations. A detailed report on assessment and the performance of the project will be presented and communicated to DOE and published by ORNL.

Hadjerioua, Boualem [ORNL; Opsahl, Egil [CleanPower AS; Gordon, Jim [Earth By Design Inc., EBD; Bishop, Norm [Knigth Piesold Co.

2012-01-01T23:59:59.000Z

309

Fish Passage Assessment of an Advanced Hydropower Turbine and Conventional Turbine Using Blade-strike Modeling  

SciTech Connect

In the Columbia and Snake River basins, several species of Pacific salmon were listed under the Endangered Species Act of 1973 due to significant declines of fish population. Dam operators and design engineers are thus faced with the task of making those hydroelectric facilities more ecologically friendly through changes in hydro-turbine design and operation. Public Utility District No. 2 of Grant County, Washington, applied for re-licensing from the U.S. Federal Energy Regulatory Commission to replace the 10 turbines at Wanapum Dam with advanced hydropower turbines that were designed to increase power generation and improve fish passage conditions. We applied both deterministic and stochastic blade-strike models to the newly installed turbine and an existing turbine. Modeled probabilities were compared to the results of a large-scale live fish survival study and a sensor fish study under the same operational parameters. Overall, injury rates predicted by the deterministic model were higher than experimental rates of injury while those predicted by the stochastic model were in close agreement with experiment results. Fish orientation at the time of entry into the plane of the leading edges of the turbine runner blades was an important factor contributing to uncertainty in modeled results. The advanced design turbine had slightly higher modeled injury rates than the existing turbine design; however, there was no statistical evidence that suggested significant differences in blade-strike injuries between the two turbines and the hypothesis that direct fish survival rate through the advanced hydropower turbine is equal or better than that through the conventional turbine could not be rejected.

Deng, Zhiqun; Carlson, Thomas J.; Dauble, Dennis D.; Ploskey, Gene R.

2011-01-04T23:59:59.000Z

310

High-power LEDs based on InGaAsP/InP heterostructures  

SciTech Connect

High-power light-emitting diodes (LEDs) with mesa diameters of 100, 200, and 300 ?m are developed on the basis of InGaAsP/InP heterostructures. The mesas are close in shape to a truncated cone with a generatrix inclination angle of ?45° in the vicinity of the active region of the LED, with a ring etched around the mesa serving as a reflector. The emission spectra and directivity patterns of these LEDs are studied in a wide range of current densities and it is shown that radiative recombination is dominant to a current density of ?5000 A/cm{sup 2}, which makes these structures promising for the development of high-power LEDs. An emission power of ?14 mW is obtained in the continuous-wave mode (I = 0.2 A, ? = 1.1 ?m), and that of 77 mW, in the pulsed mode (I = 2 A, ? = 1.1 ?m), which corresponds to external quantum efficiencies of 6.2 and 3.4%, respectively.

Rakovics, V. [Hungarian Academy of Sciences, Institute of Technical Physics and Materials Science, Research Centre for Natural Sciences (Hungary); Imenkov, A. N.; Sherstnev, V. V.; Serebrennikova, O. Yu.; Il’inskaya, N. D.; Yakovlev, Yu. P., E-mail: Yak@iropt1.ioffe.ru [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)

2014-12-15T23:59:59.000Z

311

System efficiency analysis for high power solid state radio frequency transmitter  

SciTech Connect

This paper examines some important relationships, related with the system efficiency, for very high power, radio frequency solid-state transmitter; incorporating multiple solid-state power amplifier modules, power combiners, dividers, couplers, and control/interlock hardware. In particular, the characterization of such transmitters, at the component as well as the system level, is discussed. The analysis for studying the influence of the amplitude and phase imbalance, on useful performance parameters like system efficiency and power distribution is performed. This analysis is based on a scattering parameter model. This model serves as a template for fine-tuning the results, with the help of a system level simulator. For experimental study, this approach is applied to a recently designed modular and scalable solid-state transmitter, operating at the centre frequency of 505.8?MHz and capable of delivering a continuous power of 75 kW. Such first time presented, system level study and experimental characterization for the real time operation will be useful for the high power solid-state amplifier designs, deployed in particle accelerators.

Jain, Akhilesh, E-mail: ajain@rrcat.gov.in; Sharma, D. K.; Gupta, A. K.; Lad, M. R.; Hannurkar, P. R. [RF Systems Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)] [RF Systems Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India); Pathak, S. K. [Electromagnetics and Microwave Engineering, Institute for Plasma Research, Gandhinagar 382 428 (India)] [Electromagnetics and Microwave Engineering, Institute for Plasma Research, Gandhinagar 382 428 (India)

2014-02-15T23:59:59.000Z

312

FERROELECTRIC SWITCH FOR A HIGH-POWER Ka-BAND ACTIVE PULSE COMPRESSOR  

SciTech Connect

Results are presented for design of a high-power microwave switch for operation at 34.3 GHz, intended for use in an active RF pulse compressor. The active element in the switch is a ring of ferroelectric material, whose dielectric constant can be rapidly changed by application of a high-voltage pulse. As envisioned, two of these switches would be built into a pair of delay lines, as in SLED-II at SLAC, so as to allow 30-MW ?s-length Ka-band pulses to be compressed in time by a factor-of-9 and multiplied in amplitude to generate 200 MW peak power pulses. Such high-power pulses could be used for testing and evaluation of high-gradient mm-wave accelerator structures, for example. Evaluation of the switch design was carried out with an X-band (11.43 GHz) prototype, built to incorporate all the features required for the Ka-band version.

Hirshfield, Jay L. [Omega-P, Inc.] [Omega-P, Inc.

2013-12-18T23:59:59.000Z

313

High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system  

SciTech Connect

High power, long pulse millimeter (mm) wave experiments of the RF test stand (RFTS) of Japan Atomic Energy Agency (JAEA) were performed. The system consists of a 1 MW/170 GHz gyrotron, a long and short distance transmission line (TL), and an equatorial launcher (EL) mock-up. The RFTS has an ITER-relevant configuration, i.e., consisted by a 1 MW-170 GHz gyrotron, a mm wave TL, and an EL mock-up. The TL is composed of a matching optics unit, evacuated circular corrugated waveguides, 6-miter bends, an in-line waveguide switch, and an isolation valve. The EL-mock-up is fabricated according to the current design of the ITER launcher. The Gaussian-like beam radiation with the steering capability of 20 deg. - 40 deg. from the EL mock-up was also successfully proved. The high power, long pulse power transmission test was conducted with the metallic load replaced by the EL mock-up, and the transmission of 1 MW/800 s and 0.5 MW/1000 s was successfully demonstrated with no arcing and no damages. The transmission efficiency of the TL was 96%. The results prove the feasibility of the ITER electron cyclotron heating and current drive system.

Takahashi, K.; Kajiwara, K.; Oda, Y.; Kasugai, A.; Kobayashi, N.; Sakamoto, K. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan); Doane, J.; Olstad, R. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); Henderson, M. [ITER Organization, CS90 046, 13067 St. Paul lez Durance Cedex (France)

2011-06-15T23:59:59.000Z

314

Thermal Transients During Processing of 3003 Al-H18 Multilayer Build by Very High-Power Ultrasonic Additive Manufacturing  

Science Journals Connector (OSTI)

Previous investigations suggested a gradient in bond microstructure along the height of a “build” made by very high power ultrasonic additive manufacturing—a rapid prototyping process that is based...

M. R. Sriraman; Matt Gonser; Daniel Foster…

2012-02-01T23:59:59.000Z

315

Highly efficient, high-power, broadly tunable, cryogenically cooled and diode-pumped Yb:CaF2  

Science Journals Connector (OSTI)

We present a high-power diode-pumped Yb:CaF2 laser operating at cryogenic temperature (77K). A laser output power of 97W at 1034nm was extracted for a pump power of 245W....

Ricaud, S; Papadopoulos, D N; Camy, P; Doualan, J L; Moncorgé, R; Courjaud, A; Mottay, E; Georges, P; Druon, F

2010-01-01T23:59:59.000Z

316

Nd:GdVO4 in Face-Cooled Geometries: Thin-Disk and High-Power Microchip Lasers  

Science Journals Connector (OSTI)

The potential of Nd:GdVO4 for face-cooled geometries is discussed. Particular emphasis is given to experimental and finite element studies of thin-disk and high-power, monolithic,...

Kemp, Alan J; Valentine, Gareth J; Burns, David

317

High-power diode-pumped cryogenically cooled Yb:CaF2 laser with extremely low quantum defect  

Science Journals Connector (OSTI)

High-power diode-pumped laser operation at 992–993?nm under a pumping wavelength of 981 of 986?nm is demonstrated with Yb:CaF2 operating at cryogenic temperature (77?K),...

Ricaud, S; Papadopoulos, D N; Pellegrina, A; Balembois, F; Georges, P; Courjaud, A; Camy, P; Doualan, J L; Moncorgé, R; Druon, F

2011-01-01T23:59:59.000Z

318

Spatial distribution of average charge state and deposition rate in high power impulse magnetron sputtering of copper  

E-Print Network (OSTI)

was ¼ inch (6. 25 mm) thick copper disk. The diameter of thevery high power de nsity. Copper was selected for this studythe high stability of HIPIMS copper discharges ( copper can

Horwat, David

2008-01-01T23:59:59.000Z

319

Broadly tunable high-power operation of an all-solid-state titanium-doped sapphire laser system  

Science Journals Connector (OSTI)

Broadly tunable and high-power operation of a titanium-doped sapphire laser is obtained with a diode-laser-pumped frequency-doubled Nd:YAG laser as the pump source. A maximum broadband...

Steele, T R; Gerstenberger, D C; Drobshoff, A; Wallace, R W

1991-01-01T23:59:59.000Z

320

IEEE PHOTONICS TECHNOLOGY LETTERS 1 High-Power 2.3-m GaSb-Based Linear Laser Array  

E-Print Network (OSTI)

2.3-m laser. Al Ga As Sb cladding layers. Details of the lasers' heterostructure design can be foundIEEE PHOTONICS TECHNOLOGY LETTERS 1 High-Power 2.3-m GaSb-Based Linear Laser Array L. Shterengas, G--High-power 2.3- m In(Al)GaAsSb­GaSb type-I double quantum-well diode laser arrays were fabricated

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Development of a High-Power Coaxial Pulse Tube Refrigerator for a Liquid Xenon Calorimeter  

SciTech Connect

A high-power coaxial pulse tube refrigerator has been designed, fabricated and tested to meet the requirements of liquefaction and re-condensation of xenon gas for a large liquid xenon calorimeter. A feature of this pulse tube refrigerator is that a cylindrical regenerator placed inside of the pulse tube for space saving and easy fabrication. It provides a cooling power of 70 W at 165 K by using a 2.2 kW GM-type compressor. The cooling power performance up to 120 W using a much larger compressor was also tested. The outer cylinder is a stainless steel pipe of 60 mm diameter, 180 mm in length and 0.5 mm in thickness. The regenerator consists of about 900 disk sheets of no. 300 stainless steel mesh packed in a Bakelite tube.

Haruyama, T.; Kasami, K.; Inoue, H. [KEK, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Mihara, S. [ICEPP, International Center for Elementary Particle Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan); Matsubara, Y. [Nihon University, 7-24-1 Narashinodai, Funabashi, Chiba 274-8501 (Japan)

2004-06-23T23:59:59.000Z

322

Time Structure of Particle Production in the MERIT High-Power Target Experiment  

SciTech Connect

The MERIT experiment is a proof-of-principle test of a target system for high power proton beam to be used as front-end for a neutrino factory complex or amuon collider. The experiment took data in autumn 2007 with the fast extracted beam from the CERN Proton Synchrotron (PS) to a maximum intensity of about 30 x 10{sup 12} protons per pulse. We report results from the portion of the MERIT experiment in which separated beam pulses were delivered to a free mercury jet target with time intervals between pulses varying from 2 to 700 {micro}s. The analysis is based on the responses of particle detectors placed along side and downstream of the target.

Efthymiopoulos, I.; Fabich, A.; Palm, M.; Lettry, J.; Haug, F.; Pereira, H.; Pernegger, H.; Steerenberg, R.; Grudiev, A.; /CERN; Kirk, H.G.; Park, H.; /Brookhaven /Fermilab /Oak Ridge /Princeton U. /Rutherford

2009-05-01T23:59:59.000Z

323

Coulomb explosion effect and the maximum energy of protons accelerated by high-power lasers  

Science Journals Connector (OSTI)

The acceleration of light ions (protons) through the interaction of a high-power laser pulse with a double-layer target is theoretically studied by means of two-dimensional particle-in-cell simulations and a one-dimensional analytical model. It is shown that the maximum energy acquired by the accelerated light ions (protons) depends on the physical characteristics of a heavy-ion layer (electron-ion mass ratio and effective charge state of the ions). In our theoretical model, the hydrodynamic equations for both electron and heavy-ion species are solved and the test-particle approximation for the light ions (protons) is applied. The heavy-ion motion is found to modify the longitudinal electric field distribution, thus changing the acceleration conditions for the protons.

E. Fourkal; I. Velchev; C.-M. Ma

2005-03-25T23:59:59.000Z

324

Stimulated Raman Scattering and Nonlinear Focusing of High-Power Laser Beams Propagating in Water  

E-Print Network (OSTI)

The physical processes associated with propagation of a high-power (power > critical power for self-focusing) laser beam in water include nonlinear focusing, stimulated Raman scattering (SRS), optical breakdown and plasma formation. The interplay between nonlinear focusing and SRS is analyzed for cases where a significant portion of the pump power is channeled into the Stokes wave. Propagation simulations and an analytical model demonstrate that the Stokes wave can re-focus the pump wave after the power in the latter falls below the critical power. It is shown that this novel focusing mechanism is distinct from cross-phase focusing. While discussed here in the context of propagation in water, the gain-focusing phenomenon is general to any medium supporting nonlinear focusing and stimulated forward Raman scattering.

Hafizi, B; Penano, J R; Gordon, D F; Jones, T G; Helle, M H; Kaganovich, D

2015-01-01T23:59:59.000Z

325

Grating formation by a high power radio wave in near-equator ionosphere  

SciTech Connect

The formation of a volume grating in the near-equator regions of ionosphere due to a high power radio wave is investigated. The radio wave, launched from a ground based transmitter, forms a standing wave pattern below the critical layer, heating the electrons in a space periodic manner. The thermal conduction along the magnetic lines of force inhibits the rise in electron temperature, limiting the efficacy of heating to within a latitude of few degrees around the equator. The space periodic electron partial pressure leads to ambipolar diffusion creating a space periodic density ripple with wave vector along the vertical. Such a volume grating is effective to cause strong reflection of radio waves at a frequency one order of magnitude higher than the maximum plasma frequency in the ionosphere. Linearly mode converted plasma wave could scatter even higher frequency radio waves.

Singh, Rohtash; Sharma, A. K.; Tripathi, V. K. [Department of Physics, Indian Institute of Technology Delhi, New Delhi-110016 (India)

2011-11-15T23:59:59.000Z

326

High-Power Solid-State Lasers from a Laser Glass Perspective  

SciTech Connect

Advances in laser glass compositions and manufacturing have enabled a new class of high-energy/high-power (HEHP), petawatt (PW) and high-average-power (HAP) laser systems that are being used for fusion energy ignition demonstration, fundamental physics research and materials processing, respectively. The requirements for these three laser systems are different necessitating different glasses or groups of glasses. The manufacturing technology is now mature for melting, annealing, fabricating and finishing of laser glasses for all three applications. The laser glass properties of major importance for HEHP, PW and HAP applications are briefly reviewed and the compositions and properties of the most widely used commercial laser glasses summarized. Proposed advances in these three laser systems will require new glasses and new melting methods which are briefly discussed. The challenges presented by these laser systems will likely dominate the field of laser glass development over the next several decades.

Campbell, J H; Hayden, J S; Marker, A J

2010-12-17T23:59:59.000Z

327

A review comparing cathodic arcs and high power impulse magnetron sputtering (HiPIMS)  

SciTech Connect

High power impulse magnetron sputtering (HiPIMS) has been in the center of attention over the last years as it is an emerging physical vapor deposition (PVD) technology that combines advantages of magnetron sputtering with various forms of energetic deposition of films such as ion plating and cathodic arc plasma deposition. It should not come at a surprise that many extension and variations of HiPIMS make use, intentionally or unintentionally, of previously discovered approaches to film processing such as substrate surface preparation by metal ion sputtering and phased biasing for film texture and stress control. Therefore, in this review, an overview is given on some historical developments and features of cathodic arc and HiPIMS plasmas, showing commonalities and differences. To limit the scope, emphasis is put on plasma properties, as opposed to surveying the vast literature on specific film materials and their properties.

Anders, Andre

2014-08-17T23:59:59.000Z

328

High power water load for microwave and millimeter-wave radio frequency sources  

DOE Patents (OSTI)

A high power water load for microwave and millimeter wave radio frequency sources has a front wall including an input port for the application of RF power, a cylindrical dissipation cavity lined with a dissipating material having a thickness which varies with depth, and a rear wall including a rotating reflector for the reflection of wave energy inside the cylindrical cavity. The dissipation cavity includes a water jacket for removal of heat generated by the absorptive material coating the dissipation cavity, and this absorptive material has a thickness which is greater near the front wall than near the rear wall. Waves entering the cavity reflect from the rotating reflector, impinging and reflecting multiple times on the absorptive coating of the dissipation cavity, dissipating equal amounts of power on each internal reflection.

Ives, R. Lawrence (Saratoga, CA); Mizuhara, Yosuke M. (Palo Alto, CA); Schumacher, Richard V. (Sunnyvale, CA); Pendleton, Rand P. (Saratoga, CA)

1999-01-01T23:59:59.000Z

329

Philips Lumileds Develops a Low-Cost, High-Power, Warm-White LED Package  

Energy.gov (U.S. Department of Energy (DOE))

With the help of DOE funding, Philips Lumileds has developed a low-cost, high-power, warm-white LED package for general illumination. During the course of the two-year project, this package was used to commercialize a series of products with correlated color temperatures (CCTs) ranging from 2700 to 5700 K, under the product name LUXEON M. A record efficacy of nearly 125 lm/W was demonstrated at a flux of 1023 lumens, a CCT of 3435 K, and a color rendering index (CRI) of more than 80 at room temperature in the productized package. In an R&D package, a record efficacy of more than 133 lm/W at a flux of 1015 lumens, a CCT of 3475 K, and a CRI greater than 80 at room temperature were demonstrated.

330

High-Power Laser Pulse Recirculation for Inverse Compton Scattering-Produced Gamma-Rays  

SciTech Connect

Inverse Compton scattering of high-power laser pulses on relativistic electron bunches represents an attractive method for high-brightness, quasi-monoenergetic {gamma}-ray production. The efficiency of {gamma}-ray generation via inverse Compton scattering is severely constrained by the small Thomson scattering cross section. Furthermore, repetition rates of high-energy short-pulse lasers are poorly matched with those available from electron accelerators, resulting in low repetition rates for generated {gamma}-rays. Laser recirculation has been proposed as a method to address those limitations, but has been limited to only small pulse energies and peak powers. Here we propose and experimentally demonstrate an alternative method for laser pulse recirculation that is uniquely capable of recirculating short pulses with energies exceeding 1 J. Inverse Compton scattering of recirculated Joule-level laser pulses has a potential to produce unprecedented peak and average {gamma}-ray brightness in the next generation of sources.

Jovanovic, I; Shverdin, M; Gibson, D; Brown, C

2007-04-17T23:59:59.000Z

331

FY2000 Highlights Report for the Vehicle High-Power Energy Storage Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Energy Office of Advanced Automotive Technologies 1000 Independence Avenue, S.W. Washington, DC 20585-0121 FY 2000 Highlights Report for the Vehicle High-Power Energy Storage Program Energy Efficiency and Renewable Energy Office of Transportation Technologies Office of Advanced Automotive Technologies Energy Management Team Raymond A. Sutula Energy Management Team Leader November 2000 This document highlights work sponsored by agencies of the U.S. Government. Neither the U.S. Government nor any agency, thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe

332

PIC simulation of SPT Hall thrusters : high power operation and wall effects  

E-Print Network (OSTI)

The fully kinetic Hall Thruster simulation built by [1] and used by [2] is further refined and used to obtain results for the P5 SPT Hall thruster at 3kw and 5kw operation. Performance data agree well with experiments [3], ...

Sullivan, Kay Ueda, 1980-

2004-01-01T23:59:59.000Z

333

High-power SRS lasers - coherent summators (the way it was)  

SciTech Connect

The history of the research works performed under the guidance of H.G. Basov and aimed at developing high-energy lasers - coherent summators (CSs) - based on stimulated Raman scattering (SRS) in liquid nitrogen and liquid oxygen is reported. The work was performed jointly by researchers of FIAN [the Laboratory of Quantum Radiophysics (LQRP)] and VNIIEF. Many problems were solved as a result of these studies. Liquid nitrogen and oxygen were found to be optimal active media for high-power SRS lasers with high energy per pulse. A method for purifying these cryogenic liquids from micro- and nanoimpurities was developed, which made it possible to eliminate nonlinear loss of pump radiation and converted radiation in the active medium and ensure effective operation of SRS lasers - coherent summators (SRSL CSs) with high output energy. Cryogenic cells providing high optical homogeneity of liquid nitrogen and oxygen were developed, which ensured low (at a level of 0.1 mrad) divergence of converted radiation with high energy density. Raster focusing systems providing optimal concentration of pump radiation in the active medium were designed. These studies resulted in the development of high-power highenergy SRSL CSs with a low beam divergence, based on liquid nitrogen ({lambda}{sub S} = 1.89 {mu}m) and liquid oxygen ({lambda}{sub S} = 1.65 {mu}m), with pumping by explosively pumped iodine lasers (EPILs) ({lambda}{sub p} = 1.315 {mu}m). The characteristics of the SRSL CSs developed were record for that time (the end of 1960s and the beginning of 1970s): energy up to 2.5 kJ per 10-{mu}s pulse, beam divergence {approx}10{sup -4} rad, and beam energy density of several hundreds of J cm{sup -2}. (special issue devoted to the 90th anniversary of n.g. basov)

Grasiuk, Arkadii Z; Zubarev, I G; Efimkov, V F; Smirnov, V G [P N Lebedev Physical Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2012-12-31T23:59:59.000Z

334

Nonequilibrium quantum kinetics  

SciTech Connect

This paper contains viewgraphs on non-equilibrium quantum kinetics of nuclear reactions at the intermediate and high energy ranges.

Danielewicz, P.

1997-09-22T23:59:59.000Z

335

Microsoft PowerPoint - ACOE Regional HydroPower Conference Presentation.ppt  

NLE Websites -- All DOE Office Websites (Extended Search)

FEDERAL FEDERAL HYDROPOWER CONFERENCE Tulsa, Oklahoma June 10 - 11, 2009 NERC Requirements for Generator Owner and Operator Sarah M. Blankenship, NERC Compliance Officer How do we create a culture that combines Processes, Policies and Procedures, PEOPLE and Technology? Development of an Internal NERC Compliance Program Applicable NERC Requirements for Functions GOP GO BAL-005-0 R1 CIP-001-1 R1R2 R3R4 (Sabotage Reporting) COM-002-2 R1(Communications) EOP-004-1 R2 R3 (Disturbance Reporting) Can be combined into an Integrated Plan with CIP-001-1 and CIP-008-1. EOP-009-0 R1 R2 (Regional Black Start Capability Plan) Applicable NERC Requirements for Functions GOP GO FAC-002-0 R1R2 (Coordination of Plans for New Facilities) FAC-008-1 R1 R1.1R1.2 R1.2.1R1.2.2 R1.3 R1.3.1R1.3.2

336

File:Federal Hydropower - U..S. Army Corps of Engineers.pdf | Open Energy  

Open Energy Info (EERE)

U..S. Army Corps of Engineers.pdf U..S. Army Corps of Engineers.pdf Jump to: navigation, search File File history File usage Metadata File:Federal Hydropower - U..S. Army Corps of Engineers.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 925 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:37, 22 May 2013 Thumbnail for version as of 15:37, 22 May 2013 1,275 × 1,650, 2 pages (925 KB) Graham7781 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information)

337

Negotiating river ecosystems: Impact assessment and conflict mediation in the cases of hydro-power construction  

SciTech Connect

In this paper we discuss how the legitimacy of the impact assessment process is a key issue in conflict mediation in environmental impact assessment. We contrast two EIA cases in hydro-power generation plans made for the Ii River, Finland in different decades, and evaluate how impact assessment in these cases has contributed to the creation, mediation and resolution of conflicts. We focus on the elements of distributional and procedural justice that made the former EIA process more legitimate and consensual and the latter more conflictual. The results indicate that it is crucial for conflict mediation to include all the values and interests of the parties in the goal-setting process and in the definition and assessment of alternatives. The analysis also indicates that procedural justice is the most important to help the people and groups involved to accept the legitimacy of the impact assessment process: how different parties and their values and interests are recognized, and how participation and distribution of power are organized in an impact assessment process. It is confirmed in this article that SIA may act as a mediator or a forum providing a process through which competing knowledge claims, various values and interests can be discussed and linked to the proposed alternatives and interventions.

Karjalainen, Timo P., E-mail: timopauli.karjalainen@oulu.f [Thule Institute, University of Oulu, P.O. Box 7300, FI-90014 University of Oulu (Finland); Jaervikoski, Timo, E-mail: timo.jarvikoski@oulu.f [Unit of Sociology, University of Oulu, P.O. Box 2000, FI-90014 University of Oulu (Finland)

2010-09-15T23:59:59.000Z

338

Gas breakdown driven by L band short-pulse high-power microwave  

SciTech Connect

High power microwave (HPM) driven gas breakdown is a major factor in limiting the radiation and transmission of HPM. A method that HPM driven gas breakdown could be obtained by changing the aperture of horn antenna is studied in this paper. Changing the effective aperture of horn antenna can adjust the electric field in near field zone, leading to gas breakdown. With this method, measurements of air and SF{sub 6} breakdowns are carried out on a magnetically insulated transmission-line oscillators, which is capable of generating HPM with pulse duration of 30 ns, and frequency of 1.74 GHz. The typical breakdown waveforms of air and SF{sub 6} are presented. Besides, the breakdown field strengths of the two gases are derived at different pressures. It is found that the effects of air and SF{sub 6} breakdown on the transmission of HPM are different: air breakdown mainly shortens the pulse width of HPM while SF{sub 6} breakdown mainly reduces the peak output power of HPM. The electric field threshold of SF{sub 6} is about 2.4 times larger than that of air. These differences suggest that gas properties have a great effect on the transmission characteristic of HPM in gases.

Yang Yiming; Yuan Chengwei; Qian Baoliang [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2012-12-15T23:59:59.000Z

339

MODEL AND BEAM BASED SETUP PROCEDURES FOR A HIGH POWER HADRON SUPERCONDUCTING LINAC  

SciTech Connect

This presentation will review methods for experimental determination of optimal operational set points in a multi-cavity superconducting high power hadron linac. A typical tuning process is based on comparison between measured data and the results of simulations from envelope and single-particle models. Presence of significant space charge effects requires simulation and measurement of bunch dynamics in 3 dimensions to ensure low loss beam transport. This is especially difficult in a superconducting linac where use of interceptive diagnostics is usually restricted because of the risk of SRF cavity surface contamination. The procedures discussed here are based on non-interceptive diagnostics such as beam position monitors and laser wires, and conventional diagnostics devices such as wire scanners and bunch shape monitors installed outside the superconducting linac. The longitudinal Twiss analysis based on the BPM signals will be described. The superconducting SNS linac tuning experience will be used to demonstrate problems and their solution for real world linac tune-up procedures

Shishlo, Andrei P [ORNL

2014-01-01T23:59:59.000Z

340

Thermal model design and analysis of the high-power LED automotive headlight cooling device  

Science Journals Connector (OSTI)

Abstract A study of the thermal performance of conventional plate-fin heat sinks and novel cooling device integrated with heat conductive plates (HCPS) for the application in high-power LED headlight was presented. The thermal resistance network model was built to analyze the factors which have impacts on the junction temperature. The analyses were based on the experiment combined with computations using the CFD software FloEFD. The prediction results were validated with the experimental one. Details of the heat transfer performance, particularly the temperature distribution of the LED module and lampshell, as well as the effect of HCPS length on the system thermal resistance and the average heat transfer coefficient were obtained. Since it could make some distance between the heat sink and the lampshell, the average surface convective heat transfer coefficient had been improved and the overall external thermal resistance was reduced effectively. The effects of the simulated ambient temperature, chip package depth, inclination angles and fan rotate speeds on the junction temperature were also examined. Results indicated that the airflow was weakened as the chip package depth increased. In addition, with the presence of the enforced velocity airflow, the junction temperature decreased gradually from 116.61 °C to 78.05 °C.

Xin-Jie Zhao; Yi-Xi Cai; Jing Wang; Xiao-Hua Li; Chun Zhang

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

High-Power Electrostatic Discharges in PETN: Threshold and Scaling Experiments  

SciTech Connect

There is a considerable set of data establishing the safety of PETN-based detonators that are insulted by electrostatic discharge (ESD) from a human body. However, the subject of ESD safety has garnered renewed interest because of the sparse data on high-power, low-impedance discharges that result when the source is a metallic object such as a tool. Experiments on as-built components, using pin-to-cap fault circuits through PETN-based detonators, showed significant evidence of a power dependence but with a very broad energy threshold and some uncertainty in the breakdown path. We have performed a series of experiments using a well-defined arc discharge path and a well-characterized source that is capable of independent variation of energy and power. Studies include threshold variation with power, arc length, powder surface area, and surface vs. bulk discharge paths. We find that an energy threshold variation with power does not appear to exist in the tested range of fractions to tens of MW, and that there are many subtleties to proper energy and power bookkeeping. We also present some test results for PBX 9407.

Liou, W; McCarrick, J F; Hodgin, R L; Phillips, D F

2010-03-05T23:59:59.000Z

342

Boron-rich plasma by high power impulse magnetron sputtering of lanthanum hexaboride  

SciTech Connect

Boron-rich plasmas have been obtained using a LaB{sub 6} target in a high power impulse sputtering (HiPIMS) system. The presence of {sup 10}B{sup +}, {sup 11}B{sup +}, Ar{sup 2+}, Ar{sup +}, La{sup 2+}, and La{sup +} and traces of La{sup 3+}, {sup 12}C{sup +}, {sup 14}N{sup +}, and {sup 16}O{sup +} have been detected using an integrated mass and energy spectrometer. Peak currents as low as 20 A were sufficient to obtain plasma dominated by {sup 11}B{sup +} from a 5 cm planar magnetron. The ion energy distribution function for boron exhibits an energetic tail extending over several 10 eV, while argon shows a pronounced peak at low energy (some eV). This is in agreement with models that consider sputtering (B, La) and gas supply (from background and 'recycling'). Strong voltage oscillations develop at high current, greatly affecting power dissipation and plasma properties.

Oks, Efim M. [State University of Control Systems and Radioelectronics, Tomsk (Russian Federation); Anders, Andre [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

2012-10-15T23:59:59.000Z

343

Air Electrode Design for Sustained High Power Operation of Li/air Batteries  

SciTech Connect

The rapid development of portable electronic devices increasingly requires much more energy to support advanced functions. However, currently available batteries do not meet the high energy requirement of these devices. Metal/air batteries, especially Li/air batteries, have a much higher specific energy than most other available batteries, but their power rate is limited by the accumulation of reaction products in the air electrode. Several approaches to improve the power rate of Li/air batteries have been analyzed in this work, including adjustment of air electrode porosity and catalyst reactivity distributions to minimize diffusion limitations and maximize air electrode material utilization. An interconnected dual pore system (one catalyzed and one noncatalyzed) is proposed to improve oxygen transport into the inner regions of the air electrode, but this approach alone cannot supply high power for long term applications. A time-release multiple catalyst approach is analyzed to provide temporal release of reactivity in the air electrode. When coupled with the dual pore configuration and catalysts with high reactivities, the time-release catalyst concept can extend the duration of higher powers to longer times, and result in maximum utilization of air electrode materials.

Williford, Ralph E.; Zhang, Jiguang

2009-08-31T23:59:59.000Z

344

Use of High?Power Combiners and Fast Directional Switches in ECRH Systems  

Science Journals Connector (OSTI)

The new generation of compact devices for the combination and the fast switching of high?power millimeter?wave beams [1] for Electron Cyclotron Heating (ECH) gives the possibility to switch the power (in tens of microseconds) between two lines (or two ECH launchers even modulating it between them) and combine two gyrotron sources (or in principle even more) in one single transmission line for doubling the transmitted power. This is useful in many respects in order to: 1) ?double the efficiency in modulated EC for neoclassical Tearing Modes (NTM) stabilization 2) avoid to switch?off gyrotrons in conventional (slow) switching 3) electronically control the power sharing between different applications (heating/current?drive or NTM stabilization) 4) upgrade the existing ECH systems to twice the power without adding complete transmission lines and launchers 5) test components at a power doubled with respect to the power capability of the available sources. This opens the way to the development of a more effective “active” real?time control of the ECRH power routing and generally to more flexible and powerful ECH systems. The development of different devices and the advantages for (and in view of) ITER are addressed.

A. Bruschi; W. Kasparek; V. Erckmann; M. Petelin; W. Bin; O. D’Arcangelo; L. Lubyako; V. Muzzini; B. Plaum

2009-01-01T23:59:59.000Z

345

Single-Frequency High-Power Continuous-Wave Oscillation at 1003 nm of an Optically Pumped Semiconductor Laser  

E-Print Network (OSTI)

reduction of the thermal resistance of the active semiconductor medium, resulting in a high power laser powers [1,2]. However the poor thermal conductivity of III-V materials might prevent an efficient heat by bonding it to a material of high thermal conductivity and good optical quality [2,4,5]. In this work we

Boyer, Edmond

346

Nuclear Instruments and Methods in Physics Research A 507 (2003) 537540 Production of high power femtosecond terahertz radiation  

E-Print Network (OSTI)

Nuclear Instruments and Methods in Physics Research A 507 (2003) 537­540 Production of high power for Superconductor Photonics, Osaka University, 2-1 Yamadaoko, Suita, Osaka 565-0871, Japan e Physics Department semiconductors or electro-optic crystals by high peak power lasers. For example, this was done by using an un

347

A Novel High-Power-Factor LED-Lamp Driver Based on a Single-Stage Power Conversion  

Science Journals Connector (OSTI)

This paper proposes a novel single-stage driver for supplying a T8-type light-emitting diode (LED) lamp with high power factor. The presented driver integrates a dual buck-boost converter with coupled inductors and a half-bridge series-resonant converter ... Keywords: converter, driver, light-emitting diode (LED)

Chun An Cheng, En Chih Chang, Ching Shien Tseng, Tsung Yuan Chung

2014-06-01T23:59:59.000Z

348

Analysis and Design of a High Power Density Axial Flux Permanent Magnet Linear Synchronous Machine Used for Stirling System  

Science Journals Connector (OSTI)

a high power density axial flux permanent magnet linear synchronous machine and the stirling system will be introduced. This machine is a tubular axial flux permanent magnet machine. It comprises two parts: stator and mover. With the 2D finite-element ... Keywords: permanent magnet, stirling engine, linear motor

Ping Zheng; Xuhui Gan; Lin Li

2010-09-01T23:59:59.000Z

349

Ultrathin Spinel LiMn2O4 Nanowires as High Power Cathode Materials for Li-Ion Batteries  

E-Print Network (OSTI)

Ultrathin Spinel LiMn2O4 Nanowires as High Power Cathode Materials for Li-Ion Batteries Hyun materials as cathode in lithium ion batteries because of its intrinsic low-cost, environmental friendliness that enhances the contact between active material grains and electrolyte. In particular, LiMn2O4 nanorods

Cui, Yi

350

High-power ELF radiation generated by modulated HF heating of the ionosphere can cause Earthquakes, Cyclones and localized heating  

E-Print Network (OSTI)

High-power ELF radiation generated by modulated HF heating of the ionosphere can cause Earthquakes, the HAARP heater is the most powerful ionospheric heater, with 3.6GW of effective power using HF heating, Cyclones and localized heating Fran De Aquino Maranhao State University, Physics Department, S

Paris-Sud XI, Université de

351

A high power beam-on-target test of liquid lithium target for RIA.  

SciTech Connect

Experiments were conducted to demonstrate the stable operation of a windowless liquid lithium target under extreme thermal loads that are equivalent to uranium beams from the proposed Rare Isotope Accelerator (RIA) driver linac. The engineering and safety issues accompanying liquid lithium systems are first discussed. The liquid metal technology knowledge base generated primarily for fast reactors, and liquid metal cooled fusion reactors, was applied to the development of these systems in a nuclear physics laboratory setting. The use of a high energy electron beam for simulating a high power uranium beam produced by the RIA driver linac is also described. Calculations were performed to obtain energy deposition profiles produced by electron beams at up to a few MeV to compare with expected uranium beam energy deposition profiles. It was concluded that an experimental simulation using a 1-MeV electron beam would be a valuable tool to assess beam-jet interaction. In the experiments, the cross section of the windowless liquid lithium target was 5 mm x 10 mm, which is a 1/3rd scale prototype target, and the velocity of the liquid lithium was varied up to 6 m/s. Thermal loads up to 20 kW within a beam spot diameter of 1mm were applied on the windowless liquid lithium target by the 1-MeV electron beam. The calculations showed that the maximum power density and total power deposited within the target, from the electron beam, was equivalent to that of a 200-kW, 400-MeV/u uranium beam. It was demonstrated that the windowless liquid lithium target flowing at velocities as low as 1.8 m/s stably operated under beam powers up to 20 kW without disruption or excessive vaporization.

Nolen, J.; Reed, C.; Novick, V.; Specht, J.; Plotkin, P.; Momozaki,Y.; Gomes, I.

2005-08-29T23:59:59.000Z

352

Use of the LEDA Facility as an ADS High-Power Accelerator Test Bed  

SciTech Connect

The Low-Energy Demonstration Accelerator (LEDA) was built to generate high-current proton beams. Its successful full-power operation and testing in 1999-2001 confirmed the feasibility of a high-power linear accelerator (linac) front end, the most technically challenging portion of such a machine. The 6.7-MeV accelerator operates reliably at 95-mA CW beam current with few interruptions orjaults, and qualiJes as one of the most powerful accelerators in the world. LEDA is now available to address the needs of other programs. LEDA can be upgraded in a staged fashion to allow for full-power accelerator demonstrations. The proposed post-h!FQ accelerator structures are 350-MHz superconducting spoke cavities developed for the AAA /APT program. The superconducting portion of the accelerator is designed for a IOO-mA proton beam current. Superconducting cavities were chosen because of the signijkant thermal issues with room-temperature structures, the larger superconducting cavity apertures, and the lower operating costs ('because of improved electrical efficiency) of a superconducting accelerator. Since high reliability is a major issue for an ADS system, the superconducting design architecture alIows operation through faults due to the failure of single magnets or superconducting cavities. The presently installed power capacity of 13 MVA of input ACpower is capable of supporting a 40-MeVproton beam at 100 mA. (The input power is easily expandable to 25 MVA, allowing up to 100-MeV operation). Operation at 40-MeV would provide a complete demonstration of all of the critical accelerator sub-systems ofa full-power ADS system.

Garnett, R. W. (Robert W.); Sheffield, R. L. (Richard L.)

2003-01-01T23:59:59.000Z

353

Durability of Low Platinum Fuel Cells Operating at High Power Density  

SciTech Connect

Understanding and improving the durability of cost-competitive fuel cell stacks is imperative to successful deployment of the technology. Stacks will need to operate well beyond today’s state-of-the-art rated power density with very low platinum loading in order to achieve the cost targets set forth by DOE ($15/kW) and ultimately be competitive with incumbent technologies. An accelerated cost-reduction path presented by Nuvera focused on substantially increasing power density to address non-PGM material costs as well as platinum. The study developed a practical understanding of the degradation mechanisms impacting durability of fuel cells with low platinum loading (?0.2mg/cm2) operating at high power density (?1.0W/cm2) and worked out approaches for improving the durability of low-loaded, high-power stack designs. Of specific interest is the impact of combining low platinum loading with high power density operation, as this offers the best chance of achieving long-term cost targets. A design-of-experiments approach was utilized to reveal and quantify the sensitivity of durability-critical material properties to high current density at two levels of platinum loading (the more conventional 0.45 mgPt.cm–1 and the much lower 0.2 mgPt.cm–2) across several cell architectures. We studied the relevance of selected component accelerated stress tests (AST) to fuel cell operation in power producing mode. New stress tests (NST) were designed to investigate the sensitivity to the addition of electrical current on the ASTs, along with combined humidity and load cycles and, eventually, relate to the combined city/highway drive cycle. Changes in the cathode electrochemical surface area (ECSA) and average oxygen partial pressure on the catalyst layer with aging under AST and NST protocols were compared based on the number of completed cycles. Studies showed elevated sensitivity of Pt growth to the potential limits and the initial particle size distribution. The ECSA loss was correlated with the upper potential limit in the cycle tests, although the performance degradation was found to be a strong function of initial Pt loading. A large fraction of the voltage degradation was found due to increased mass transfer overpotentials, especially in the lower Pt loading cells. Increased mass transfer overpotentials were responsible for a large fraction of the voltage degradation at high current densities. Analysis of the impedance and polarization data indicated O2 diffusion in the aged electrode ionomer to be the main source of the increased mass transfer overpotentials. Results from the experimental parametric studies were used to inform and calibrate newly developed durability model, simulating lifetime performance of the fuel cell under variety of load-cycle protocols, electrode loadings and throughout wide range of operating conditions, including elevated-to-3.0A/cm2 current densities. Complete durability model included several sub-models: platinum dissolution-and-growth as well as reaction-diffusion model of cathode electrode, applied sequentially to study the lifetime predictions of ECSA and polarization performance in the ASTs and NSTs. These models establish relations between changes in overpotentials, ECSA and oxygen mass transport in fuel cell cathodes. The model was calibrated using single cells with land-channel and open flowfield architectures. The model was validated against Nuvera Orion® (open flowfield) short stack data in the load cycle durability tests. The reaction-diffusion model was used to correlate the effective mass transfer coefficients for O2 diffusion in cathode ionomer and separately in gas pores with the operating conditions (pressure, temperature, gas velocity in flow field and current density), Pt loading, and ageing related growth in Pt particles and thinning of the electrode. Achievements of both modeling and experimental objectives were demonstrated in a full format, subscale stacks operating in a simulated but fully realistic ambient environment, using system-compatible operating protocols.

Polevaya, Olga [Nuvera Fuel Cells Inc.] [Nuvera Fuel Cells Inc.; Blanchet, Scott [Nuvera Fuel Cells Inc.] [Nuvera Fuel Cells Inc.; Ahluwalia, Rajesh [Argonne National Lab] [Argonne National Lab; Borup, Rod [Los-Alamos National Lab] [Los-Alamos National Lab; Mukundan, Rangachary [Los-Alamos National Lab] [Los-Alamos National Lab

2014-03-19T23:59:59.000Z

354

kinetic wave energy  

Science Journals Connector (OSTI)

kinetic wave energy ? kinetische Wellenenergie f [Teil der Wellenlänge, die im Feld der Orbitalgeschwindigkeiten unter der Welle enthalten ist und als Orbitalbewegung am Ort verbleibt

2014-08-01T23:59:59.000Z

355

Composite Cathode for High-Power Density Solid Oxide Fuel Cells  

SciTech Connect

Reduction of solid oxide fuel cell (SOFC) operating temperature will play a key role in reducing the stack cost by allowing the use of low-cost metallic interconnects and new approaches to sealing, while making applications such as transportation more feasible. Reported results for anode-supported SOFCs show that cathode polarization resistance is the primary barrier to achieving high power densities at operating temperatures of 700 C and lower. This project aims to identify and develop composite cathodes that could reduce SOFC operating temperatures below 700 C. This effort focuses on study and use of (La,Sr)(Co,Fe)O{sub 3} (LSCF) based composite cathodes, which have arguably the best potential to substantially improve on the currently-used, (La,Sr)MnO{sub 3}-Yttria-stabilized Zirconia. During this Phase I, it was successfully demonstrated that high performances can be achieved with LSCF/Gadolinium-Doped Ceria composite cathodes on Ni-based anode supported cells operating at 700 C or lower. We studied electrochemical reactions at LSCF/Yttria-stabilized Zirconia (YSZ) interfaces, and observed chemical reactions between LSCF and YSZ. By using ceria electrolytes or YSZ electrolytes with ceria diffusion barrier layers, the chemical reactions between LSCF and electrolytes were prevented under cathode firing conditions necessary for the optimal adhesion of the cathodes. The protection provided by ceria layer is expected to be adequate for stable long-term cathode performances, but more testing is needed to verify this. Using ceria-based barrier layers, high performance Ni-YSZ anode supported cells have been demonstrated with maximum power densities of 0.8W/cm2 at 700 C and 1.6W/cm{sup 2} at 800 C. Ni-SDC anode supported cells with SDC electrolytes yielded >1W/cm{sup 2} at 600 C. We speculate that the power output of Ni-YSZ anode supported cell at 700 C and lower, was limited by the quality of the Ceria and Ceria YSZ interface. Improvements in the low-temperature performances are expected based on further development of barrier layer fabrication processes and optimization of cathode microstructure.

Ilwon Kim; Scott Barnett; Yi Jiang; Manoj Pillai; Nikkia McDonald; Dan Gostovic; Zhongryang Zhan; Jiang Liu

2004-01-31T23:59:59.000Z

356

HIGH-POWER TURBODRILL AND DRILL BIT FOR DRILLING WITH COILED TUBING  

SciTech Connect

Commercial introduction of Microhole Technology to the gas and oil drilling industry requires an effective downhole drive mechanism which operates efficiently at relatively high RPM and low bit weight for delivering efficient power to the special high RPM drill bit for ensuring both high penetration rate and long bit life. This project entails developing and testing a more efficient 2-7/8 in. diameter Turbodrill and a novel 4-1/8 in. diameter drill bit for drilling with coiled tubing. The high-power Turbodrill were developed to deliver efficient power, and the more durable drill bit employed high-temperature cutters that can more effectively drill hard and abrasive rock. This project teams Schlumberger Smith Neyrfor and Smith Bits, and NASA AMES Research Center with Technology International, Inc (TII), to deliver a downhole, hydraulically-driven power unit, matched with a custom drill bit designed to drill 4-1/8 in. boreholes with a purpose-built coiled tubing rig. The U.S. Department of Energy National Energy Technology Laboratory has funded Technology International Inc. Houston, Texas to develop a higher power Turbodrill and drill bit for use in drilling with a coiled tubing unit. This project entails developing and testing an effective downhole drive mechanism and a novel drill bit for drilling 'microholes' with coiled tubing. The new higher power Turbodrill is shorter, delivers power more efficiently, operates at relatively high revolutions per minute, and requires low weight on bit. The more durable thermally stable diamond drill bit employs high-temperature TSP (thermally stable) diamond cutters that can more effectively drill hard and abrasive rock. Expectations are that widespread adoption of microhole technology could spawn a wave of 'infill development' drilling of wells spaced between existing wells, which could tap potentially billions of barrels of bypassed oil at shallow depths in mature producing areas. At the same time, microhole coiled tube drilling offers the opportunity to dramatically cut producers' exploration risk to a level comparable to that of drilling development wells. Together, such efforts hold great promise for economically recovering a sizeable portion of the estimated remaining shallow (less than 5,000 feet subsurface) oil resource in the United States. The DOE estimates this U.S. targeted shallow resource at 218 billion barrels. Furthermore, the smaller 'footprint' of the lightweight rigs utilized for microhole drilling and the accompanying reduced drilling waste disposal volumes offer the bonus of added environmental benefits. DOE analysis shows that microhole technology has the potential to cut exploratory drilling costs by at least a third and to slash development drilling costs in half.

Robert Radtke; David Glowka; Man Mohan Rai; David Conroy; Tim Beaton; Rocky Seale; Joseph Hanna; Smith Neyrfor; Homer Robertson

2008-03-31T23:59:59.000Z

357

Generation of high power pulsed terahertz radiation using a plasmonic photoconductive emitter array with logarithmic spiral antennas  

SciTech Connect

An array of 3?×?3 plasmonic photoconductive terahertz emitters with logarithmic spiral antennas is fabricated on a low temperature (LT) grown GaAs substrate and characterized in response to a 200 fs optical pump from a Ti:sapphire mode-locked laser at 800?nm wavelength. A microlens array is used to split and focus the optical pump beam onto the active area of each plasmonic photoconductive emitter element. Pulsed terahertz radiation with record high power levels up to 1.9 mW in the 0.1–2 THz frequency range is measured at an optical pump power of 320 mW. The record high power pulsed terahertz radiation is enabled by the use of plasmonic contact electrodes, enhancing the photoconductor quantum efficiencies, and by increasing the overall device active area, mitigating the carrier screening effect and thermal breakdown at high optical pump power levels.

Berry, Christopher W. [Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109 (United States); Hashemi, Mohammad R.; Jarrahi, Mona [Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109 (United States); Department of Electrical Engineering, University of California, Los Angeles, California 90095 (United States)

2014-02-24T23:59:59.000Z

358

Long-term research in Japan: amorphous metals, metal oxide varistors, high-power semiconductors and superconducting generators  

SciTech Connect

The review revealed that significant activity is under way in the research of amorphous metals, but that little fundamental work is being pursued on metal oxide varistors and high-power semiconductors. Also, the investigation of long-term research program plans for superconducting generators reveals that activity is at a low level, pending the recommendations of a study currently being conducted through Japan's Central Electric Power Council.

Hane, G.J.; Yorozu, M.; Sogabe, T.; Suzuki, S.

1985-04-01T23:59:59.000Z

359

A Feasibility Analysis for the Design of A Low-Cost High-Power Energy Storage System  

E-Print Network (OSTI)

A Feasibility Analysis for the Design of A Low-Cost High-Power Energy Storage System Travis Mc://www.funginstitute.berkeley.edu/sites/default/ les/EnergyStorageSystem.pdf May 3, 2014 130 Blum Hall #5580 Berkeley, CA 94720-5580 | (510) 664 of existing systems. Energy storage is a viable method for increasing the e ciency of a broad range of systems

Sekhon, Jasjeet S.

360

THE MERIT HIGH-POWER TARGET EXPERIMENT AT THE CERN PS K.T. McDonald,  

E-Print Network (OSTI)

37831, U.S.A. P.H. Titus, Princeton Plasma Physics Laboratory, Princeton, NJ 08543, U.S.A. JTHE MERIT HIGH-POWER TARGET EXPERIMENT AT THE CERN PS K.T. McDonald, Princeton University, Princeton, NJ 08544, U.S.A. H.G. Kirk, H. Park, T. Tsang, BNL, Upton, NY 11973, U.S.A. I. Efthymiopoulos, A

McDonald, Kirk

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Research and Development of High-Power and High-Energy Electrochemical Storage Devices  

SciTech Connect

The accomplishments and technology progressmade during the U.S. Department of Energy (DOE) Cooperative Agreement No. DE-FC26- 05NT42403 (duration: July 11, 2005 through April 30, 2014, funded for $125 million in cost- shared research) are summarized in this Final Technical Report for a total of thirty-seven (37) collaborative programs organized by the United States Advanced Battery Consortium, LLC (USABC). The USABC is a partnership, formed in 1991, between the three U.S. domestic automakers Chrysler, Ford, and General Motors, to sponsor development of advanced high-performance batteries for electric and hybrid electric vehicle applications. The USABC provides a unique opportunity for developers to leverage their resources in combination with those of the automotive industry and the Federal government. This type of pre-competitive cooperation minimizes duplication of effort and risk of failure, and maximizes the benefits to the public of the government funds. A major goal of this program is to promote advanced battery development that can lead to commercialization within the domestic, and as appropriate, the foreign battery industry. A further goal of this program is to maintain a consortium that engages the battery manufacturers with the automobile manufacturers and other key stakeholders, universities, the National Laboratories, and manufacturers and developers that supply critical materials and components to the battery industry. Typically, the USABC defines and establishes consensus goals, conducts pre-competitive, vehicle-related research and development (R&D) in advanced battery technology. The R&D carried out by the USABC is an integral part of the DOE’s effort to develop advanced transportation technologies that will significantly improve fuel economy, comply with projected emissions and safety regulations, and use domestically produced fuels. The USABC advanced battery development plan has the following three focus areas: 1. Existing technology validation, implementation, and cost reduction. 2. Identification of the next viable technology with emphasis on the potential to meet USABC cost and operating temperature range goals. 3. Support high-risk, high-reward battery technology R&D. Specific to the Cooperative Agreement DE- FC26-05NT42403, addressing High-Energy and High Power Energy Storage Technologies, the USABC focus was on understanding and addressing the following factors (listed in priority of effort): • Cost: Reducing the current cost of lithium- ion batteries (currently about 2-3 times the FreedomCAR target ($20/kW). • Low Temperature Performance: Improving the discharge power and removing lithium plating during regenerative braking. • Calendar Life: Achieving 15-year life and getting accurate life prediction. • Abuse Tolerance: Developing a system level tolerance to overcharge, crush, and high temperature exposure. This Final Technical Report compilation is submitted in fulfillment of the subject Cooperative Agreement, and is intended to serve as a ready-reference for the outcomes of following eight categories of projects conducted by the USABC under award from the DOE’s Energy Efficiency and Renewable Energy ) Vehicle Technologies Program: USABC DoE Final Report – DoE Cooperative Agreement DE-FC26-95EE50425 8 Protected Information 1. Electric Vehicle (EV) (Section A of this report) 2. Hybrid Electric Vehicle (HEV) (Section B 3. Plug-In Hybrid Electric Vehicle (PHEV) (Section C) 4. Low-Energy Energy Storage Systems (LEESS) (Section D) 5. Technology Assessment Program (TAP) (Section E) 6. Ultracapacitors (Section F) 7. 12 Volt Start-Stop (Section G) 8. Separators (Section H) The report summarizes the main areas of activity undertaken in collaboration with the supplier community and the National Laboratories. Copies of the individual supplier final reports are available upon request. Using project gap analysis versus defined USABC goals in each area, the report documents known technology limits and provides direction on future areas of technology and performance needs for vehicle applicatio

No, author

2014-04-30T23:59:59.000Z

362

The development of low cost LiFePO4-based high power lithium-ion batteries  

NLE Websites -- All DOE Office Websites (Extended Search)

development of low cost LiFePO4-based high power lithium-ion batteries development of low cost LiFePO4-based high power lithium-ion batteries Title The development of low cost LiFePO4-based high power lithium-ion batteries Publication Type Journal Article Year of Publication 2005 Authors Striebel, Kathryn A., Joongpyo Shim, Azucena Sierra, Hui Yang, Xiangyun Song, Robert Kostecki, and Kathryn N. McCarthy Journal Journal of Power Sources Volume 146 Pagination 33-38 Keywords libob, lifepo4, lithium-ion, post-test, raman spectroscopy Abstract Pouch type LiFePO4-natural graphite lithium-ion cells were cycled at constant current with periodic pulse-power testing in several different configurations. Components were analyzed after cycling with electrochemical, Raman and TEM techniques to determine capacity fade mechanisms. The cells with carbon-coated current collectors in the cathode and LiBOB-salt electrolyte showed the best performance stability. In many cases, iron species were detected on the anodes removed from cells with both TEM and Raman spectroscopy. The LiFePO4 electrodes showed unchanged capacity suggesting that the iron is migrating in small quantities and is acting as a catalyst to destabilize the anode SEI in these cells.

363

Full-energy-chain greenhouse-gas emissions: a comparison between nuclear power, hydropower, solar power and wind power  

Science Journals Connector (OSTI)

Fair comparison of the climate impacts from different energy sources can be made only by accounting for the emissions of all relevant greenhouse gases (GHGs) from the full energy chain (FENCH) of the energy sources. FENCH-GHG emission factors of most of the non-fossil fuel energies are lower than those of the fossil fuels that are in the range of 500-1200 g CO2/kW h(e). The improvement rates concerning their CO2-to-energy ratios of OECD countries and some developing countries are discussed, showing the low performance of the latter from 1965-1996. Detailed FENCH-GHG systems analyses are given for nuclear power, hydropower, and wind and solar power. The FENCH-GHG emission factor of nuclear power is 8.9 g CO2-equiv./kW h(e) and applies to light-water nuclear power plants. The main contributions are from milling, conversion of lower-grade ore, enrichment, construction and operation of the power plant, and reprocessing (if relevant). For hydropower an emission factor is reported of 16 g CO2-equiv./kW h(e) for the best investigated flat-area cold climate power plants. The main, biogenic, emission source is the water reservoir. The information on high-altitude alpine reservoir-type and run-of- river hydropower generation is limited. These plants could probably have emission factors in the low range of 5-10 g CO2-equiv./kW h(e). The FENCH CO2-equivalent emission factors of wind power systems are in the order of 15 g CO2-equiv./kW h(e). The main source is associated with the materials for the turbine and for its foundation. Solar PV and solar thermal power are in an intermediate range their current values are 100-200 and 50-80g CO2-equiv./kW h(e), respectively. GHG emissions are mainly from silicon, which dominates the PV market.

Joop F. van de Vate

2002-01-01T23:59:59.000Z

364

Evaluating greenhouse gas emissions from hydropower complexes on large rivers in Eastern Washington  

SciTech Connect

Water bodies, such as freshwater lakes, are known to be net emitters of carbon dioxide (CO2), and methane (CH4). In recent years, significant greenhouse gas (GHG) emissions from tropical, boreal, and mid-latitude reservoirs have been reported. At a time when hydropower is increasing worldwide, better understanding of seasonal and regional variation in GHG emissions is needed in order to develop a predictive understanding of such fluxes within man-made impoundments. We examined power-producing dam complexes within xeric temperate locations in the northwestern United States. Sampling environments on the Snake (Lower Monumental Dam Complex) and Columbia Rivers (Priest Rapids Dam Complex) included tributary, mainstem, embayment, forebay, and tailrace areas during winter and summer 2012. At each sampling location, GHG measurement pathways included surface gas flux, degassing as water passed through dams during power generation, ebullition within littoral embayments, and direct sampling of hyporheic pore-water. Measurements were also carried out in a free-flowing reach of the Columbia River to estimate unaltered conditions. Surface flux resulted in very low emissions, with reservoirs acting as a sink for CO2 (up to –262 mg m-2 d-1, which is within the range previously reported for similarly located reservoirs). Surface flux of methane remained below 1 mg CH4 m-2d-1, a value well below fluxes reported previously for temperate reservoirs. Water passing through hydroelectric projects acted as a sink for CO2 during winter and a small source during summer, with mean degassing fluxes of –117 and 4.5 t CO2 d-1, respectively. Degassing of CH4 was minimal, with mean fluxes of 3.1 × 10-6 and –5.6 × 10-4 t CH4 d-1 during winter and summer, respectively. Gas flux due to ebullition was greater in coves located within reservoirs than in coves within the free flowing Hanford Reach–and CH4 flux exceeded that of CO2. Methane emissions varied widely across sampling locations, ranging from 10.5 to 1039 mg CH4 m-2 d-1, with mean fluxes of 324 mg CH4 m-2 d-1in Lower Monumental Dam reservoir and 482 mg CH4 m-2d-1 in the Priest Rapids Dam reservoir. The magnitude of methane flux due to ebullition was unexpectedly high, and falls within the range recently reported for other temperate reservoirs around the world, further suggesting that this methane source should be considered in estimates of global greenhouse gas emissions. Methane flux from sediment pore-water within littoral embayments averaged 4.2 mg m-2 d-1 during winter and 8.1 mg m-2 d-1 during summer, with a peak flux of 19.8 mg m-2d-1 (at the same location where CH4 ebullition was also the greatest). Carbon dioxide flux from sediment pore-water averaged approximately 80 mg m-2d-1 with little difference between winter and summer. Similar to emissions from ebullition, flux from sediment pore-water was higher in reservoirs than in the free flowing reach.

Arntzen, Evan V.; Miller, Benjamin L.; O'Toole, Amanda C.; Niehus, Sara E.; Richmond, Marshall C.

2013-03-15T23:59:59.000Z

365

New England Wind Forum: A Wind Powering America Project, Newsletter #5 -- January 2010, Wind and Hydropower Technologies Program (WHTP)  

Wind Powering America (EERE)

5 - January 2010 5 - January 2010 Two 600-kW wind turbines were installed on Deer Island in August 2009 next to the wastewater treatment facility's anaerobic digesters. Due to their proximity to Logan Airport, these generators were installed on unusually short 32-meter towers. WIND AND HYDROPOWER TECHNOLOGIES PROGRAM continued on page 2 > Kathryn Craddock, Sustainable Energy Advantage, LLC/PIX16710 Wind Projects Sprout Throughout New England NEWF is pleased to provide you with its fifth edition of the electronic NEWF newsletter. This newsletter provides updates on a broad range of project proposals and policy initiatives across New England during the funding hiatus...consider it a "catch-up" double issue. In past newsletters, we've relied on wind farm photo-simulations, photos of early construction

366

Prediction of ungauged river basin for hydropower potential and flood risk mitigation: a case study at Gin River, Sri Lanka  

Science Journals Connector (OSTI)

A hydrologic study was performed for ungauged river basin of Sri Lanka to examine synthetic discharge relations. Rainfall-runoff relationships were used for identifying hydrological conditions of the Gin River basin. The peak discharge achieves within 4.74 hours from the onset of the rainstorm and 11.95 hours take to reach its normal discharge conditions. Stream frequency of the Gin River is 4.56 junctions/km² while the channel slope gradient is 7.90 m/km. The regional coefficient of the catchment is 0.00296. Higher stream frequency and gentle channel slope were identified as flood triggering factors of the basin. Mini-hydropower systems were recognised as the most applicable and economical flood controlling hydraulic structures. Also, it can be utilised as a reliable energy source (8,630.0 kW).

A.S. Ratnayake; A. Pitawala

2014-01-01T23:59:59.000Z

367

The development of low cost LiFePO4-based high power lithium-ion batteries  

SciTech Connect

The cycling performance of low-cost LiFePO4-based high-power lithium-ion cells was investigated and the components were analyzed after cycling to determine capacity fade mechanisms. Pouch type LiFePO4/natural graphite cells were assembled and evaluated by constant C/2 cycling, pulse-power and impedance measurements. From post-test electrochemical analysis after cycling, active materials, LiFePO4 and natural graphite, showed no degradation structurally or electrochemically. The main reasons for the capacity fade of cell were lithium inventory loss by side reaction and possible lithium deposition on the anode.

Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

2003-11-25T23:59:59.000Z

368

Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode  

SciTech Connect

Thermal plasma expansion is characterised during the operation of a high power diode with an explosive emission carbon-fiber-aluminum cathode driven by a 250?kV, 150?ns accelerating pulse. It is found that a quasi-stationary state of plasma expansion is obtained during the main part of the accelerating pulse and the whole plasma expansion exhibits an “U”-shape velocity evolution. A theoretical model describing the dynamics of plasma expansion is developed, which indicates that the plasma expansion velocity is determined by equilibrium between the diode current density and plasma thermal electron current density.

Ju, J.-C., E-mail: jujinchuan@126.com [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China); Laboratoire de Physique des Gaz et des Plasmas, CNRS-Université Paris-Sud, Orsay 91405 (France); Liu, L.; Cai, D. [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2014-06-09T23:59:59.000Z

369

Wafer-scale surface roughening for enhanced light extraction of high power AlGaInP-based light-emitting diodes  

Science Journals Connector (OSTI)

A new approach to surface roughening was established and optimized in this paper for enhancing the light extraction of high power AlGaInP-based LEDs, by combining ultraviolet (UV)...

Park, Hyeong-Ho; Zhang, Xin; Cho, Yunae; Kim, Dong-Wook; Kim, Joondong; Lee, Keun Woo; Choi, Jehyuk; Lee, Hee Kwan; Jung, Sang Hyun; Her, Eun Jin; Kim, Chang Hwan; Moon, A-Young; Shin, Chan-Soo; Shin, Hyun-Beom; Sung, Ho Kun; Park, Kyung Ho; Park, Hyung-Ho; Kim, Hi-Jung; Kang, Ho Kwan

2014-01-01T23:59:59.000Z

370

Analysis of spectra of acoustic signals generated by high-power pulsed laser radiation propagating in the atmosphere. I. Spectra of local plasma formations  

Science Journals Connector (OSTI)

Results of theoretical and experimental investigations into the spectra of acoustic signals generated by high-power pulsed laser radiation propagating in the atmosphere in the breakdown mode are given in ... of a...

S. V. Shamanaev; L. G. Shamanaeva

2005-11-01T23:59:59.000Z

371

OPTICS LETTERS / Vol. 30, No. 22 / November 15, 2005, pp 3030-3032 Evidence of thermal effects in high power Er3+  

E-Print Network (OSTI)

power 1.55µm double cladding Erbium-Ytterbium fiber laser. At strong pumping rates, 1µm lasing can start be obtained using double-clad doped fiber pumped with broad area high power pump laser diodes. Double-clad in high power Er3+ -Yb3+ fiber laser G. Canat, J.-C. Mollier DOTA, ONERA, Chemin de la Hunière, 91761

Boyer, Edmond

372

CLEERS Coordination & Joint Development of Benchmark Kinetics...  

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

Kinetic Data CLEERS Coordination & Joint Development of Benchmark Kinetics for LNT & SCR CLEERS Coordination & Development of Catalyst Process Kinetic Data - Pres. 1:...

373

Kinetics Of Carbon Gasification  

Science Journals Connector (OSTI)

Kinetics Of Carbon Gasification ... The steam–carbon reaction, which is the essential reaction of the gasification processes of carbon-based feed stocks (e.g., coal and biomass), produces synthesis gas (H2 + CO), a synthetically flexible, environmentally benign energy source. ... Coal Gasification in CO2 and Steam:? Development of a Steam Injection Facility for High-Pressure Wire-Mesh Reactors ...

C. W. Zielke; Everett. Gorin

1957-03-01T23:59:59.000Z

374

LLNL Chemical Kinetics Modeling Group  

SciTech Connect

The LLNL chemical kinetics modeling group has been responsible for much progress in the development of chemical kinetic models for practical fuels. The group began its work in the early 1970s, developing chemical kinetic models for methane, ethane, ethanol and halogenated inhibitors. Most recently, it has been developing chemical kinetic models for large n-alkanes, cycloalkanes, hexenes, and large methyl esters. These component models are needed to represent gasoline, diesel, jet, and oil-sand-derived fuels.

Pitz, W J; Westbrook, C K; Mehl, M; Herbinet, O; Curran, H J; Silke, E J

2008-09-24T23:59:59.000Z

375

Low-cost, high-power mechanical impact transducers for sonar and acoustic through-wall surveillance applications  

E-Print Network (OSTI)

A new concept is presented for mechanical acoustic transmitters and matched resonant receivers. The lightweight, compact, and low-cost transmitters produce high-power acoustic pulses at one or more discrete frequencies with very little input power. The transducer systems are well suited for coupling acoustic pulse energy into dense media, such as walls and water. Applications of the impact transducers are discussed, including detection and tracking of humans through walls and long-duration underwater surveillance by a low-cost network of autonomous, self-recharging, battery-operated sonobuoys. A conceptual design of a sonobuoy surveillance network for harbors and littoral waters is presented. An impact-transmitter and matched-receiver system that detected human motion through thick walls with only rudimentary signal processing is described, and results are presented. Signal processing methods for increasing the signal-to-noise ratio by several tens of dB are discussed.

Felber, Franklin

2014-01-01T23:59:59.000Z

376

Numerical investigation of the physical model of a high-power electromagnetic wave in a magnetically insulated transmission line  

SciTech Connect

An efficient numerical code for simulating the propagation of a high-power electromagnetic pulse in a vacuum transmission line is required to study the physical phenomena occurring in such a line, to analyze the operation of present-day megavolt generators at an {approx}10-TW power level, and to design such new devices. The main physical theoretical principles are presented, and the stability of flows in the near-threshold region at the boundary of the regime of magnetic self-insulation is investigated based on one-dimensional telegraph equations with electron losses. Numerical (difference) methods-specifically, a method of characteristics and a finite-difference scheme-are described and their properties and effectiveness are compared by analyzing the high-frequency modes.

Samokhin, A. A. [Troitsk Institute for Innovation and Fusion Research (Russian Federation)

2010-02-15T23:59:59.000Z

377

Ppb-level QEPAS NO2 sensor by use of electrical modulation cancellation method with a high power blue LED  

Science Journals Connector (OSTI)

Abstract A novel electrical modulation cancellation method (E-MOCAM) is proposed to suppress the background noise in the case of the excitation light source with a poor beam quality. For its practical implementation, an E-MOCAM based on-beam QEPAS NO2 sensor by use of a commercial high-power wide-stripe LED is developed. The E-MOCAM ultimately suppressed the background noise caused by the stray light by three orders of magnitude. A 1? detection limit of 1.3 ppb (part per billion by volume) was achieved at 1 s integration time in this experiment, which corresponds to a normalized noise equivalent absorption coefficient (NNEA) 4.2 × 10?9 W cm?1 Hz?1/2. A 9 h continuous on-line monitoring of ambient atmospheric NO2 was carried out on the campus of Shanxi University.

Huadan Zheng; Lei Dong; Xukun Yin; Xiaoli Liu; Hongpeng Wu; Lei Zhang; Weiguang Ma; Wangbao Yin; Suotang Jia

2015-01-01T23:59:59.000Z

378

Plasma diagnostics of low pressure high power impulse magnetron sputtering assisted by electron cyclotron wave resonance plasma  

SciTech Connect

This paper reports on an investigation of the hybrid pulsed sputtering source based on the combination of electron cyclotron wave resonance (ECWR) inductively coupled plasma and high power impulse magnetron sputtering (HiPIMS) of a Ti target. The plasma source, operated in an Ar atmosphere at a very low pressure of 0.03 Pa, provides plasma where the major fraction of sputtered particles is ionized. It was found that ECWR assistance increases the electron temperature during the HiPIMS pulse. The discharge current and electron density can achieve their stable maximum 10 {mu}s after the onset of the HiPIMS pulse. Further, a high concentration of double charged Ti{sup ++} with energies of up to 160 eV was detected. All of these facts were verified experimentally by time-resolved emission spectroscopy, retarding field analyzer measurement, Langmuir probe, and energy-resolved mass spectrometry.

Stranak, Vitezslav [Ernst-Moritz-Arndt-Universitaet Greifswald, Institut fuer Physik, Felix-Hausdorff-Str. 6, 17489 Greifswald (Germany); University of South Bohemia, Institute of Physics and Biophysics, Branisovska 31, 370 05 Ceske Budejovice (Czech Republic); Herrendorf, Ann-Pierra; Drache, Steffen; Bogdanowicz, Robert; Hippler, Rainer [Ernst-Moritz-Arndt-Universitaet Greifswald, Institut fuer Physik, Felix-Hausdorff-Str. 6, 17489 Greifswald (Germany); Cada, Martin; Hubicka, Zdenek [Institute of Physics v. v. i., Academy of Science of the Czech Republic, Na Slovance 2, 182 21 Prague (Czech Republic); Tichy, Milan [Charles University in Prague, Faculty of Mathematics and Physics, V Holesovickach 2, 180 00 Prague (Czech Republic)

2012-11-01T23:59:59.000Z

379

High power impulse magnetron sputtering and related discharges: scalable plasma sources for plasma-based ion implantation and deposition  

SciTech Connect

High power impulse magnetron sputtering (HIPIMS) and related self-sputtering techniques are reviewed from a viewpoint of plasma-based ion implantation and deposition (PBII&D). HIPIMS combines the classical, scalable sputtering technology with pulsed power, which is an elegant way of ionizing the sputtered atoms. Related approaches, such as sustained self-sputtering, are also considered. The resulting intense flux of ions to the substrate consists of a mixture of metal and gas ions when using a process gas, or of metal ions only when using `gasless? or pure self-sputtering. In many respects, processing with HIPIMS plasmas is similar to processing with filtered cathodic arc plasmas, though the former is easier to scale to large areas. Both ion implantation and etching (high bias voltage, without deposition) and thin film deposition (low bias, or bias of low duty cycle) have been demonstrated.

Anders, Andre

2009-09-01T23:59:59.000Z

380

Kinetic equilibrium and relativistic thermodynamics  

E-Print Network (OSTI)

Relativistic thermodynamics is treated from the point of view of kinetic theory. It is shown that the generalized J\\"uttner distribution suggested in [1] is compatible with kinetic equilibrium. The requirement of compatibility of kinetic and thermodynamic equilibrium reveals several generalizations of the Gibbs relation where the velocity field is an independent thermodynamic variable.

P. Ván

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Improving alternative fuel utilization: detailed kinetic combustion...  

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

alternative fuel utilization: detailed kinetic combustion modeling & experimental testing Improving alternative fuel utilization: detailed kinetic combustion modeling &...

382

Probing the plasma near high power wave launchers in fusion devices for static and dynamic electric fields  

SciTech Connect

An exploratory study was carried out in the long-pulse tokamak Tore Supra, to determine if electric fields in the plasma around high-power, RF wave launchers could be measured with non-intrusive, passive, optical emission spectroscopy. The focus was in particular on the use of the external electric field Stark effect. The feasibility was found to be strongly dependent on the spatial extent of the electric fields and overlap between regions of strong (> 1 kV/cm) electric fields and regions of plasma particle recycling and plasma-induced, spectral line emission. Most amenable to the measurement was the RF electric field in edge plasma, in front of a lower hybrid heating and current drive launcher. Electric field strengths and direction, derived from fitting the acquired spectra to a model including time-dependent Stark effect and the tokamak-range magnetic field Zeeman-effect, were found to be in good agreement with full-wave modeling of the observed launcher.

Klepper, C Christopher [ORNL; Martin, Elijah H [ORNL; Isler, Ralph C [ORNL; Colas, L. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Goniche, M. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Hillairet, J. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Panayotis, Stephanie [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Jacquot, Jonathan [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Lotte, Ph. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Colledani, G. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Biewer, Theodore M [ORNL; Caughman, J. B. O. [Oak Ridge National Laboratory (ORNL); Ekedahl, A. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Green, David L [ORNL; Harris, Jeffrey H [ORNL; Hillis, Donald Lee [ORNL; Shannon, Prof. Steven [North Carolina State University; Litaudon, X [French Atomic Energy Commission (CEA)

2014-01-01T23:59:59.000Z

383

Study on thermal performance of high power LED employing aluminum filled epoxy composite as thermal interface material  

Science Journals Connector (OSTI)

Abstract This paper elucidates the thermal behavior of an LED employing metal filled polymer matrix as thermal interface material (TIM) for an enhanced heat dissipation characteristic. Highly thermal conductive aluminum (Al) particles were incorporated in bisphenol A diglycidylether (DGEBA) epoxy matrix to study the effect of filler to polymer ratio on the thermal performance of high power LEDs. The curing behavior of DGEBA was studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The dispersion nature of the Al fillers in polymer matrix was verified with Field Emission Scanning Electron Microscope (FESEM). The thermal performance of synthesized Al filled polymer composite as TIM was tested with an LED employing thermal transient measurement technique. Comparing the filler to polymer ratio, the rise in junction temperature for 60 wt% Al filled composite was higher by 11.1 °C than 50 wt% Al filled composite at cured state. Observed also from the structure function analysis that the total thermal resistance was 10.96 K/W higher for 60 wt% Al filled composite compared to 50 wt% Al filled composite. On the other hand, a significant rise of 9.5 °C in the junction temperature between cured and uncured samples of 50 wt% Al filled polymer TIM was observed and hence the importance of curing process of metal filled polymer composite for effective heat dissipation is discussed extensively in this work.

P. Anithambigai; S. Shanmugan; D. Mutharasu; T. Zahner; D. Lacey

2014-01-01T23:59:59.000Z

384

Improving Switching Performance of Power MOSFETs Used in High Rep-Rate, Short Pulse, High-Power Pulsers  

SciTech Connect

As their switching and power handling characteristics improve, solid-state devices are finding new applications in pulsed power. This is particularly true of applications that require fast trains of short duration pulses. High voltage (600-1200V) MOSFETs are especially well suited for use in these systems, as they can switch at significant peak power levels and are easily gated on and off very quickly. MOSFET operation at the shortest pulse durations is not constrained by the intrinsic capabilities of the MOSFET, but rather by the capabilities of the gate drive circuit and the system physical layout. This project sought to improve MOSFET operation in a pulsed power context by addressing these issues. The primary goal of this project is to improve the switching performance of power MOSFETs for use in high rep-rate, short pulse, high-power applications by improving the design of the gate drive circuits and the circuit layouts used in these systems. This requires evaluation of new commercial gate drive circuits and upgrading the designs of LLNL-developed circuits. In addition, these circuits must be tested with the fastest available high-voltage power MOSFETs.

Cook, E G

2006-09-19T23:59:59.000Z

385

Multi-nozzle array spray cooling for large area high power devices in a closed loop system  

Science Journals Connector (OSTI)

Abstract A prototype of a closed loop system was built to study multi-nozzle array spray cooling on high-power, large-area electronic devices. Fifty-four nozzles with an in-lined array of 9 × 6 were applied to spray cool a simulated 6U electronic card using R134a. Simple drainage concepts were introduced to assist the drainage of both liquid and vapour on the heated surface. The results indicated a promising prospect of using a multi-nozzle array on large-area power electronics cooling. 16 kW heat was removed from the 6U card area by maintaining the mean surface temperature below 26.5  ° C . Heat transfer coefficient up to 2.8  × 10 4 W / m 2 K was obtained, and liquid usage fraction as high as 0.88 was achieved before CHF occurred. It was found that increasing nozzle pressure drop or flow rate enhanced heat transfer and gave better surface temperature uniformity. Chamber pressure significantly influenced mean surface temperature, but had no observable effects on surface temperature uniformity. The control of chamber pressure can maintain a constant temperature on the heated surface when heat load varied largely. The results also showed that the spray-to-spray interactions had inconspicuous effects on local surface temperatures but rather the distance from a location relative to the drainage outlets.

J.L. Xie; Y.B. Tan; T.N. Wong; F. Duan; K.C. Toh; K.F. Choo; P.K. Chan; Y.S. Chua

2014-01-01T23:59:59.000Z

386

Chemical kinetics modeling  

SciTech Connect

This project emphasizes numerical modeling of chemical kinetics of combustion, including applications in both practical combustion systems and in controlled laboratory experiments. Elementary reaction rate parameters are combined into mechanisms which then describe the overall reaction of the fuels being studied. Detailed sensitivity analyses are used to identify those reaction rates and product species distributions to which the results are most sensitive and therefore warrant the greatest attention from other experimental and theoretical research programs. Experimental data from a variety of environments are combined together to validate the reaction mechanisms, including results from laminar flames, shock tubes, flow systems, detonations, and even internal combustion engines.

Westbrook, C.K.; Pitz, W.J. [Lawrence Livermore National Laboratory, CA (United States)

1993-12-01T23:59:59.000Z

387

Scalable High-Power Redox Capacitors with Aligned Nanoforests of Crystalline MnO2 Nanorods by High Voltage Electrophoretic Deposition  

Science Journals Connector (OSTI)

Scalable High-Power Redox Capacitors with Aligned Nanoforests of Crystalline MnO2 Nanorods by High Voltage Electrophoretic Deposition ... The scalable nanomanufacturing process is demonstrated by roll-printing an aligned forest of ?-MnO2 nanorods on a large flexible substrate (1 inch by 1 foot). ...

Sunand Santhanagopalan; Anirudh Balram; Dennis Desheng Meng

2013-02-01T23:59:59.000Z

388

Free-Standing LiNi0.5Mn1.5O4/Carbon Nanofiber Network Film as Light-Weight and High-Power  

E-Print Network (OSTI)

Free-Standing LiNi0.5Mn1.5O4/Carbon Nanofiber Network Film as Light-Weight and High-Power Cathode Pure carbon nanofiber (CNF) network without LiNi0.5Mn1.5O4 was tested in the voltage window of 3.5-5 V

Zhou, Chongwu

389

Journal of Power Sources 153 (2006) 6875 Numerical study of a flat-tube high power density solid oxide fuel cell  

E-Print Network (OSTI)

power density (HPD) solid oxide fuel cell (SOFC) is a geometry based on a tubular type SOFC: Flat-tube; High power density (HPD); Solid oxide fuel cell (SOFC); Simulation; Performance; Optimization 1. Introduction A solid oxide fuel cell (SOFC), like any other fuel cell, produces electrical

390

Journal of Power Sources 140 (2005) 331339 Numerical study of a flat-tube high power density solid oxide fuel cell  

E-Print Network (OSTI)

) solid oxide fuel cell (SOFC) is a new design developed by Siemens Westinghouse, based on their formerly.V. All rights reserved. Keywords: Flat-tube; High power density; Solid oxide fuel cell; Simulation; Heat oxide fuel cell Part I. Heat/mass transfer and fluid flow Yixin Lu1, Laura Schaefer, Peiwen Li2

391

CX-003728: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

28: Categorical Exclusion Determination 28: Categorical Exclusion Determination CX-003728: Categorical Exclusion Determination Improved Structure and Fabrication of Large, High-Power Kinetic Hydropower System Rotors - Year 2 CX(s) Applied: A9, B3.1, B5.1 Date: 09/16/2010 Location(s): New York Office(s): Energy Efficiency and Renewable Energy, Golden Field Office Verdant Power will use the Department of Energy funding to design and test, both in lab and in-water, a next generation advanced waterpower technology: large, high power Kinetic Hydropower System rotors. This determination is being made for the project's Phase 2 tasks which include prototype fabrication; test stand and in-water testing at the Roosevelt Island Tidal Energy Project site; and project management activities. DOCUMENT(S) AVAILABLE FOR DOWNLOAD

392

CLEERS Coordination & Joint Development of Benchmark Kinetics...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CLEERS Coordination & Joint Development of Benchmark Kinetics for LNT & SCR CLEERS Coordination & Joint Development of Benchmark Kinetics for LNT & SCR 2012 DOE Hydrogen and Fuel...

393

CLEERS Coordination & Joint Development of Benchmark Kinetics...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Joint Development of Benchmark Kinetics for LNT & SCR CLEERS Coordination & Joint Development of Benchmark Kinetics for LNT & SCR 2011 DOE Hydrogen and Fuel Cells Program, and...

394

CLEERS Coordination & Development of Catalyst Process Kinetic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CLEERS Coordination & Development of Catalyst Process Kinetic Data CLEERS Coordination & Development of Catalyst Process Kinetic Data 2009 DOE Hydrogen Program and Vehicle...

395

Direct Observation of Aggregative Nanoparticle Growth: Kinetic...  

NLE Websites -- All DOE Office Websites (Extended Search)

Aggregative Nanoparticle Growth: Kinetic Modeling of the Size Distribution and Growth Rate. Direct Observation of Aggregative Nanoparticle Growth: Kinetic Modeling of the Size...

396

Multidimensional simulation and chemical kinetics development...  

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

Developing chemical kinetic mechanisms and applying them to simulating engine combustion processes. deer09aceves.pdf More Documents & Publications Chemical Kinetic Research on...

397

Statkraft is Europe's largest generator of renewable energy and is the leading power company in Norway. The company owns, produces and develops hydropower, wind power, gas-fired power and  

E-Print Network (OSTI)

in Norway. The company owns, produces and develops hydropower, wind power, gas-fired power and districtStatkraft is Europe's largest generator of renewable energy and is the leading power company countries. For our office in Düsseldorf we are currently looking to hire a System Manager Renewable Energy

Morik, Katharina

398

Reciprocal Relations Between Kinetic Curves  

E-Print Network (OSTI)

We study coupled irreversible processes. For linear or linearized kinetics with microreversibility, $\\dot{x}=Kx$, the kinetic operator $K$ is symmetric in the entropic inner product. This form of Onsager's reciprocal relations implies that the shift in time, $\\exp (Kt)$, is also a symmetric operator. This generates reciprocity relations between kinetic curves. For example, for the Master equation, if we start the process from the $i$th pure state and measure the probability $p_j(t)$ of the $j$th state ($j\

Yablonsky, G S; Constales, D; Galvita, V; Marin, G B

2010-01-01T23:59:59.000Z

399

Chemical Looping Combustion Kinetics  

SciTech Connect

One of the most promising methods of capturing CO{sub 2} emitted by coal-fired power plants for subsequent sequestration is chemical looping combustion (CLC). A powdered metal oxide such as NiO transfers oxygen directly to a fuel in a fuel reactor at high temperatures with no air present. Heat, water, and CO{sub 2} are released, and after H{sub 2}O condensation the CO{sub 2} (undiluted by N{sub 2}) is ready for sequestration, whereas the nickel metal is ready for reoxidation in the air reactor. In principle, these processes can be repeated endlessly with the original nickel metal/nickel oxide participating in a loop that admits fuel and rejects ash, heat, and water. Our project accumulated kinetic rate data at high temperatures and elevated pressures for the metal oxide reduction step and for the metal reoxidation step. These data will be used in computational modeling of CLC on the laboratory scale and presumably later on the plant scale. The oxygen carrier on which the research at Utah is focused is CuO/Cu{sub 2}O rather than nickel oxide because the copper system lends itself to use with solid fuels in an alternative to CLC called 'chemical looping with oxygen uncoupling' (CLOU).

Edward Eyring; Gabor Konya

2009-03-31T23:59:59.000Z

400

Low-Cost Superconducting Wire for Wind Generators: High Performance, Low Cost Superconducting Wires and Coils for High Power Wind Generators  

SciTech Connect

REACT Project: The University of Houston will develop a low-cost, high-current superconducting wire that could be used in high-power wind generators. Superconducting wire currently transports 600 times more electric current than a similarly sized copper wire, but is significantly more expensive. The University of Houston’s innovation is based on engineering nanoscale defects in the superconducting film. This could quadruple the current relative to today’s superconducting wires, supporting the same amount of current using 25% of the material. This would make wind generators lighter, more powerful and more efficient. The design could result in a several-fold reduction in wire costs and enable their commercial viability of high-power wind generators for use in offshore applications.

None

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Development of a 10 kW High Temperature High Power Density Three-Phase AC-DC-AC SiC Converter  

SciTech Connect

This paper presents the development and experimental performance of a 10 kW, all SiC, 250 C junction temperature high-power-density three-phase ac-dc-ac converter. The electromagnetic interference filter, thermal system, high temperature package, and gate drive design are discussed in detail. Finally, tests confirming the feasibility and validating the theoretical basis of the prototype converter system are described.

Ning, Puqi [ORNL

2012-01-01T23:59:59.000Z

402

Wir schaffen Wissen heute fr morgen Daniela Kiselev, 4th High Power Targetry Workshop, 2.5.-6.5.2011, Malm, Sweden  

E-Print Network (OSTI)

.5.-6.5.2011, Malmö, Sweden 6.5.2011PSI, Paul Scherrer Institut Examination of a copper collimator irradiated.5.-6.5.2011, Malmö, Sweden 6.5.2011PSI, Contents ·Location, purpose and history of collimator KHE2 ·DPA calculation) ·Conclusion and outlook #12;Daniela Kiselev, 4th High Power Targetry Workshop, 2.5.-6.5.2011, Malmö, Sweden 6

McDonald, Kirk

403

Hierarchical 3D micro-/nano-V2O5 (vanadium pentoxide) spheres as cathode materials for high-energy and high-power lithium ion-batteries  

Science Journals Connector (OSTI)

Abstract We facilely fabricate hierarchical 3D microspheres consisting of 2D V2O5 (vanadium pentoxide) nanosheets by a low temperature hydrothermal method and use it to structure hierarchical 3D micro-/nano-LIBs (lithium ion batteries) cathode. This is a template-free and facile method easy for scale-up production of hierarchical 3D micro-/nano-structured V2O5 spheres beneficial for high performance \\{LIBs\\} applications. Such a facile method resulted hierarchical 3D micro-/nano-V2O5 possess many unique features good for LIBs: (1) 2D V2O5 nanosheets facilitate the Li+ diffusions and electron transports; (2) hierarchical 3D micro-/nano-cathode structure built up by V2O5 nanosheet spheres will lead to the close and sufficient contact between electrolytes and activate materials and at the same time will create buffer volume to accommodate the volume change during discharging/charging process; and (3) micro-scale V2O5 spheres are easy to result in high cell packing density beneficial for high power battery. As revealed by the experimental results, the micro-/nano-V2O5 electrode demonstrates high initial discharge and charge capacities with no irreversible loss, high rate capacities at different currents and long-lasting lifespan. The high-energy and high-power performances of the micro-/nano-V2O5 electrode is ascribed to the unique hierarchical micro-/nano-structure merits of V2O5 spheres as abovementioned. In view of the advantages of facile fabrication method and unique features of 3D micro-/nano-V2O5 spheres for high power and high energy LIB battery, it is of great significance to beneficially broaden the applications of high-energy and high-power \\{LIBs\\} with creating novel hierarchical micro-/nano-structured V2O5 cathode materials.

Hongwei Bai; Zhaoyang Liu; Darren Delai Sun; Siew Hwa Chan

2014-01-01T23:59:59.000Z

404

Theoretical Studies in Chemical Kinetics  

NLE Websites -- All DOE Office Websites (Extended Search)

Theoretical Studies in Chemical Kinetics ^ ^ iCi| Theoretical Studies in Chemical Kinetics ^ ^ iCi| under AEC Contract A T (30-1)-3780 " ■ ' Annual Report (1970) Principal In-vestigator: Martin Karpins Institution: Harvard University The research performed under this contract can best be sunmarized under several headings. (a) Alkali-Halideg Alkali-Halide (MX^ M*X*) Exchange Reactions. This project is being continued. A careful study of certain

405

Journal of the Korean Physical Society, Vol. 49, December 2006, pp. S309S313 High-Power Pulse Transformer for a 1.5-MW Magnetron of KSTAR LHCD  

E-Print Network (OSTI)

Transformer for a 1.5-MW Magnetron of KSTAR LHCD Microwave Application Sung-Duck Jang, Yoon-Gyu Son and Jong-power magnetron. The high power pulse transformer has the function of transferring pulse energy from a pulsed power source to a high-power load. A pulse transformer producing a pulse with a peak voltage of 45 k

406

A Kinetic model of crack fusion  

Science Journals Connector (OSTI)

......Research Note A Kinetic model of crack fusion Zbigniew Czechowski Institute of Geophysics...presents a kinetic approach to the problem of fusion of cracks. A kinetic equation for the...repetitive episodes of seismicity. crack fusion|kinetic model|seismicity| References......

Zbigniew Czechowski

1991-02-01T23:59:59.000Z

407

Economics of Hydropower Plants  

Science Journals Connector (OSTI)

The feed-in tariff scheme, as its name suggests is based ... plant. The most important aspect of a feed-in tariff system is that the grid operator cannot ... stations must reduce their power generation. The feed-in

Prof. Dr.-Ing Hermann-Josef Wagner…

2011-01-01T23:59:59.000Z

408

Hydropower Program Technology Overview  

SciTech Connect

New fact sheets for the DOE Office of Power Technologies (OPT) that provide technology overviews, description of DOE programs, and market potential for each OPT program area.

Not Available

2001-10-01T23:59:59.000Z

409

Relationships between Western Area Power Administration`s power marketing program and hydropower operations at Salt Lake City area integrated projects  

SciTech Connect

This technical memorandum provides background information on the Western Area Power Administration (Western) and the physical characteristics of the Salt Lake City Area Integrated Projects (SLCA/IP) hydropower plants, which include the Colorado River Storage Project, the Rio Grande Project, and the Collbran Project. In addition, the history, electrical capacity, storage capacity, and flow restrictions at each dam are presented. An overview of Western`s current programs and services, including a review of statutory authorities, agency discretion, and obligations, is also provided. The variability of SLCA/IP hourly generation under various alternative marketing strategies and purchasing programs is discussed. The effects of Western`s services, such as area load control, outage assistance, and transmission, on SLCA/IP power plant operations are analyzed.

Veselka, T.D.; Folga, S.; Poch, L.A. [and others

1995-03-01T23:59:59.000Z

410

Projects selected in todays announcement will focus on updating technologies and methods to improve the performance of conventional hydropower plants  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

in today's announcement will focus on updating technologies in today's announcement will focus on updating technologies and methods to improve the performance of conventional hydropower plants. The projects selected for negotiation of awards include: Dehlsen Associates, LLC (Carpinteria, CA) will further develop and validate the Aquantis Current Plane ocean current turbine technology. The project will validate analytical design tools and develop the technology's direct drive component. DOE share: up to $750,000; Duration: up to 2 years Dehlsen Associates, LLC (Carpinteria, CA) will first develop a bottom habitat survey methodology and siting study approach in accordance with all relevant regulatory agencies in the southeast Florida region; then they will determine the most suitable areas for mooring marine and hydrokinetic facilities based on the

411

Chemical kinetics and combustion modeling  

SciTech Connect

The goal of this program is to gain qualitative insight into how pollutants are formed in combustion systems and to develop quantitative mathematical models to predict their formation rates. The approach is an integrated one, combining low-pressure flame experiments, chemical kinetics modeling, theory, and kinetics experiments to gain as clear a picture as possible of the process in question. These efforts are focused on problems involved with the nitrogen chemistry of combustion systems and on the formation of soot and PAH in flames.

Miller, J.A. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

412

Desorption Kinetics of Methanol, Ethanol, and Water from Graphene...  

NLE Websites -- All DOE Office Websites (Extended Search)

Desorption Kinetics of Methanol, Ethanol, and Water from Graphene. Desorption Kinetics of Methanol, Ethanol, and Water from Graphene. Abstract: The desorption kinetics of methanol,...

413

Operational Analysis of Multiregional Nuclear Reactor Kinetics  

Science Journals Connector (OSTI)

......Operational Analysis of Multiregional Nuclear Reactor Kinetics NASSAR H. S. HAIDAR...analytically for a multiregional nuclear reactor whose subregions are of arbitrary...Operational Analysis of Multiregional Nuclear Reactor Kinetics NASSAU H. S. HAIDAR......

NASSAR H. S. HAIDAR

1983-05-01T23:59:59.000Z

414

KINETIC ROUGHENING PHENOMENA, STOCHASTIC GROWTH, DIRECTED  

E-Print Network (OSTI)

KINETIC ROUGHENING PHENOMENA, STOCHASTIC GROWTH, DIRECTED POLYMERS AND ALL THAT Aspects 254 (1995) 215-414 Kinetic roughening phenomena, stochastic growth, directed polymers and all that for the nonlinear term 3.2. Dynamic RG analysis 3.3. A worthy detour: kinetic roughening with conservation law 3

Halpin-Healy, Tim

415

Slow Sorption Kinetics of Pentachlorophenol on Soil  

E-Print Network (OSTI)

Slow Sorption Kinetics of Pentachlorophenol on Soil: Concentration Effects J O H N P . D I V I N C of Delaware, Newark, Delaware 19717-1303 We investigated the sorption kinetics of pentachlorophenol (PCP in sorption. The onset of the slow sorption kinetics was also concentration dependent. At higher PCP

Sparks, Donald L.

416

14CME Kinetic Energy and Mass Kinetic energy is the energy that a  

E-Print Network (OSTI)

14CME Kinetic Energy and Mass Kinetic energy is the energy that a body has by virtue of its mass the table by determining the value of the missing entries using the formula for Kinetic Energy. Problem 2: What is the minimum and maximum range for the observed kinetic energies for the 10 CMEs? The largest

417

Estimating The Thermodynamics And Kinetics Of Chlorinated Hydrocarbon...  

NLE Websites -- All DOE Office Websites (Extended Search)

Estimating The Thermodynamics And Kinetics Of Chlorinated Hydrocarbon Degradation. Estimating The Thermodynamics And Kinetics Of Chlorinated Hydrocarbon Degradation. Abstract: Many...

418

Recent results obtained by use of accelerators on plasma-edge properties in controlled-fusion devices and on properties of high-power neutral beams  

SciTech Connect

The study of plasma-wall interactions is of primary importance in present fusion devices. Measurements of incident fuel and impurity fluxes, retention and release of fuel atoms, and erosion of internal components are of particular interest. Accelerators in the megaelectronvolt range are being used both to measure the depth profile of fuel atoms implanted in samples placed in the plasma edge by use of nuclear reactions and to measure impurities and film thicknesses by use of elastic scattering reactions. Secondary ion mass spectrometry (SIMS) is used to determine flux and energy distributions of fuel atoms and to measure species composition and impurities in the beams of high power neutral beam injectors. Recent results obtained with these techniques are presented and areas of future study are discussed.

Langley, R.A.

1982-01-01T23:59:59.000Z

419

Initiation of ignition of a combustible gas mixture in a closed volume by the radiation of a high-power pulsed CO{sub 2} laser  

SciTech Connect

The results of experiments on initiating the ignition of a CH{sub 4} - O{sub 2} - SF{sub 6} triple gas mixture in a closed volume by the radiation of a high-power CO{sub 2} laser are presented. It is shown that spatially nonuniform (in the direction of the laser beam) gas heating by the laser radiation leads to formation of a fast combustion wave, propagating along the chamber axis and giving rise to 'instantaneous' ignition. At the threshold value 16.5 J of the laser radiation energy the fast combustion wave is transformed into a detonation wave, which causes an explosion and destruction of the reaction chamber.

Kazantsev, S Yu; Kononov, I G; Kossyi, I A; Popov, N A; Tarasova, N M; Firsov, K N

2012-01-31T23:59:59.000Z

420

Numerical studies of the high power microwave breakdown in gas using the fluid model with a modified electron energy distribution function  

SciTech Connect

A modified electron energy distribution function (EEDF) is introduced into the fluid model and its effects on the high power microwave (HPM) breakdown in air and argon are investigated. A proper numerical scheme for the finite-difference time-domain method is employed to solve the fluid model. Numerical simulations show that the HPM breakdown time in argon predicted by the fluid model with the modified EEDF agrees well with the results of Particle-in-cell-Monte Carlo collision simulations, while the Maxwellian EEDF results in faster HPM breakdown when the mean electron energy is less than 20 eV. We also confirm that the Maxwellian EEDF can be used in the fluid model for simulating the air breakdown at the low frequencies based on the reported experiments.

Zhao Pengcheng; Liao Cheng; Lin Chenbin; Chang Lei; Fu Haijun [Institute of Electromagnetics, Southwest Jiaotong University, Chengdu 610031 (China)

2011-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Heat Flux Calculation and Problem of Flaking of Boron Carbide Coatings on the Faraday Screen of the ICRH Antennas During Tore Supra High Power, Long Pulse Operation  

SciTech Connect

Reliable and repetitive high power and long pulse tokamak operation is strongly dependant of the ability to secure the Plasma Facing Components (PFCs). In Tore Supra, a network of 7 infrared (IR) video cameras is routinely used to prevent PFCs overheating and damage in selected regions. Real time feedback control and offline analysis are essential for basic protection and understanding of abnormal thermal events. One important limitation detected by the IR real time feed-back loop during high power RF operation (injected power of 9.5 MW over 26 s and 12 MW over 10 s have been achieved respectively in 2006 and 2008) is due to the interaction between fast ions which increase the power flux density and flaking of the boron carbide coatings on the Faraday screen box of the ICRH antennas. An IR-based experimental procedure is proposed in order to detect new flakes during plasma operation. The thermal response of the B4C coating is studied with and without flaking during plasma operation. The experimental heat flux deposited by fast ion losses on the Faraday screen is calculated for high (3.8 T) and low magnetic field (2 T) during high RF power operation (with fundamental hydrogen minority and second harmonic ICRH heating schemes respectively). The paper addresses both thermal science issues applied to machine protection and limitation due to fast ions issues during high RF power, long pulse operation. Safety margin to critical heat flux and number of fatigue cycles under heat load are presented in the paper.

Corre, Y. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Lipa, M. [CEA IRFM, St. Paul-lez-Durance, France] [CEA IRFM, St. Paul-lez-Durance, France; Agarici, G. [Fusion for Energy (F4E), Barcelona, Spain] [Fusion for Energy (F4E), Barcelona, Spain; Basiuk, V. [CEA IRFM, St. Paul-lez-Durance, France] [CEA IRFM, St. Paul-lez-Durance, France; Colas, L. [French Atomic Energy Commission (CEA)] [French Atomic Energy Commission (CEA); Courtois, X. [CEA, St. Paul Les Durance, France] [CEA, St. Paul Les Durance, France; Dumont, R. J. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Ekedahl, A. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Gardarein, J. L. [University of Aix, Marseille, France] [University of Aix, Marseille, France; Klepper, C Christopher [ORNL] [ORNL; Martin, V. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Moncada, V. [CEA, St. Paul Les Durance, France] [CEA, St. Paul Les Durance, France; Portafaix, C. [CEA, St. Paul Les Durance, France] [CEA, St. Paul Les Durance, France; Rigollet, F. [University of Aix, Marseille, France] [University of Aix, Marseille, France; Tawizgant, R. [CEA, St. Paul Les Durance, France] [CEA, St. Paul Les Durance, France; Travere, J. M. [CEA, St. Paul Les Durance, France] [CEA, St. Paul Les Durance, France; Valliez, K. [CEA, St. Paul Les Durance, France] [CEA, St. Paul Les Durance, France

2011-01-01T23:59:59.000Z

422

Energy 101: Hydroelectric Power  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Learn how hydropower captures the kinetic energy of flowing water and turns it into electricity for our homes and businesses.

423

ESS 2012 Peer Review - Amber Kinetics Flywheel Energy Storage Demo - Ed Chiao, Amber Kinetics  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

amber_kinetics amber_kinetics DOE Peer Review September 2012 Ed Chiao, CEO amber_kinetics Amber Kinetics: Our Flywheel History Start-up launched in 2009, Stanford University Cleantech Entrepreneurship class Established a technology licensing & flywheel development partnership with LLNL; Amber Kinetics identified new material & lower-cost rotor designs for commercialization Awarded a Smart Grid Energy Storage Demonstration grant award for flywheels Awarded a matching grant for development & demonstration of flywheel technology Stanford University Lawrence Livermore National Laboratory U.S. Department of Energy California Energy Commission World-class institutions | innovative, deep flywheel technology owned by Amber Amber Kinetics, Inc. - Confidential and Proprietary, All Rights Reserved

424

Oxidation kinetics of aluminum diboride  

SciTech Connect

The oxidation characteristics of aluminum diboride (AlB{sub 2}) and a physical mixture of its constituent elements (Al+2B) were studied in dry air and pure oxygen using thermal gravimetric analysis to obtain non-mechanistic kinetic parameters. Heating in air at a constant linear heating rate of 10 °C/min showed a marked difference between Al+2B and AlB{sub 2} in the onset of oxidation and final conversion fraction, with AlB{sub 2} beginning to oxidize at higher temperatures but reaching nearly complete conversion by 1500 °C. Kinetic parameters were obtained in both air and oxygen using a model-free isothermal method at temperatures between 500 and 1000 °C. Activation energies were found to decrease, in general, with increasing conversion for AlB{sub 2} and Al+2B in both air and oxygen. AlB{sub 2} exhibited O{sub 2}-pressure-independent oxidation behavior at low conversions, while the activation energies of Al+2B were higher in O{sub 2} than in air. Differences in the composition and morphology between oxidized Al+2B and AlB{sub 2} suggested that Al{sub 2}O{sub 3}–B{sub 2}O{sub 3} interactions slowed Al+2B oxidation by converting Al{sub 2}O{sub 3} on aluminum particles into a Al{sub 4}B{sub 2}O{sub 9} shell, while the same Al{sub 4}B{sub 2}O{sub 9} developed a needle-like morphology in AlB{sub 2} that reduced oxygen diffusion distances and increased conversion. The model-free kinetic analysis was critical for interpreting the complex, multistep oxidation behavior for which a single mechanism could not be assigned. At low temperatures, moisture increased the oxidation rate of Al+2B and AlB{sub 2}, but both appear to be resistant to oxidation in cool, dry environments. - Graphical abstract: Isothermal kinetic data for AlB{sub 2} in air, showing a constantly decreasing activation energy with increasing conversion. Model-free analysis allowed for the calculation of global kinetic parameters despite many simultaneous mechanisms occurring concurrently. (a) Time–temperature plots, (b) conversion as a function of time, (c) Arrhenius plots used to calculate activation energies, and (d) activation energy as a function of conversion. Display Omitted - Highlights: • First reported kinetic parameters for AlB{sub 2} and Al+2B oxidation in air and O{sub 2}. • Possible mechanism of enhanced boron combustion presented. • Moisture sensitivity shown to be problematic for AlB{sub 2}, less for Al+2B.

Whittaker, Michael L., E-mail: michaelwhittaker2016@u.northwestern.edu [Department of Materials Science and Engineering, University of Utah, 122S. Central Campus Drive, Salt Lake City, UT 84112 (United States); Sohn, H.Y. [Department of Metallurgical Engineering, University of Utah, 135S 1460 E, Rm 00412, Salt Lake City, UT 84112 (United States); Cutler, Raymond A. [Ceramatec, Inc., 2425S. 900W., Salt Lake City, UT 84119 (United States)

2013-11-15T23:59:59.000Z

425

Kinetic Modeling of Microbiological Processes  

SciTech Connect

Kinetic description of microbiological processes is vital for the design and control of microbe-based biotechnologies such as waste water treatment, petroleum oil recovery, and contaminant attenuation and remediation. Various models have been proposed to describe microbiological processes. This editorial article discusses the advantages and limiation of these modeling approaches in cluding tranditional, Monod-type models and derivatives, and recently developed constraint-based approaches. The article also offers the future direction of modeling researches that best suit for petroleum and environmental biotechnologies.

Liu, Chongxuan; Fang, Yilin

2012-09-17T23:59:59.000Z

426

CLEERS Coordination & Development of Catalyst Process Kinetic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Development of Catalyst Process Kinetic Data - Pres. 1: Coordination of CLEERS Project; Pres. 2: ORNL Research on LNT Sulfation & Desulfation CLEERS Coordination & Development of...

427

CLEERS Coordination & Development of Catalyst Process Kinetic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

& coordinate DOE research efforts (CLEERS Coordination) * Develop detailed technical data required to simulate energy efficient emission controls (LNT & SCR Kinetics, Sulfur &...

428

The Fractional Kinetic Equation and Thermonuclear Functions  

E-Print Network (OSTI)

The paper discusses the solution of a simple kinetic equation of the type used for the computation of the change of the chemical composition in stars like the Sun. Starting from the standard form of the kinetic equation it is generalized to a fractional kinetic equation and its solutions in terms of H-functions are obtained. The role of thermonuclear functions, which are also represented in terms of G- and H-functions, in such a fractional kinetic equation is emphasized. Results contained in this paper are related to recent investigations of possible astrophysical solutions of the solar neutrino problem.

H. J. Haubold; A. M. Mathai

2000-01-16T23:59:59.000Z

429

Kinetics of actinide complexation reactions  

SciTech Connect

Though the literature records extensive compilations of the thermodynamics of actinide complexation reactions, the kinetics of complex formation and dissociation reactions of actinide ions in aqueous solutions have not been extensively investigated. In light of the central role played by such reactions in actinide process and environmental chemistry, this situation is somewhat surprising. The authors report herein a summary of what is known about actinide complexation kinetics. The systems include actinide ions in the four principal oxidation states (III, IV, V, and VI) and complex formation and dissociation rates with both simple and complex ligands. Most of the work reported was conducted in acidic media, but a few address reactions in neutral and alkaline solutions. Complex formation reactions tend in general to be rapid, accessible only to rapid-scan and equilibrium perturbation techniques. Complex dissociation reactions exhibit a wider range of rates and are generally more accessible using standard analytical methods. Literature results are described and correlated with the known properties of the individual ions.

Nash, K.L.; Sullivan, J.C.

1997-09-01T23:59:59.000Z

430

Combustion kinetics and reaction pathways  

SciTech Connect

This project is focused on the fundamental chemistry of combustion. The overall objectives are to determine rate constants for elementary reactions and to elucidate the pathways of multichannel reactions. A multitechnique approach that features three independent experiments provides unique capabilities in performing reliable kinetic measurements over an exceptionally wide range in temperature, 300 to 2500 K. Recent kinetic work has focused on experimental studies and theoretical calculations of the methane dissociation system (CH{sub 4} + Ar {yields} CH{sub 3} + H + Ar and H + CH{sub 4} {yields} CH{sub 3} + H{sub 2}). Additionally, a discharge flow-photoionization mass spectrometer (DF-PIMS) experiment is used to determine branching fractions for multichannel reactions and to measure ionization thresholds of free radicals. Thus, these photoionization experiments generate data that are relevant to both reaction pathways studies (reaction dynamics) and fundamental thermochemical research. Two distinct advantages of performing PIMS with high intensity, tunable vacuum ultraviolet light at the National Synchrotron Light Source are high detection sensitivity and exceptional selectivity in monitoring radical species.

Klemm, R.B.; Sutherland, J.W. [Brookhaven National Laboratory, Upton, NY (United States)

1993-12-01T23:59:59.000Z

431

Multiple temperature kinetic model and gas-kinetic method for hypersonic non-equilibrium flow computations  

E-Print Network (OSTI)

Multiple temperature kinetic model and gas-kinetic method for hypersonic non-equilibrium flow. For the non-equilibrium flow computations, i.e., the nozzle flow and hypersonic rarefied flow over flat plate-kinetic method; Hypersonic and rarefied flows 1. Introduction The development of aerospace technology has

Xu, Kun

432

Testing the kinetic energy functional: Kinetic energy density as a density functional  

E-Print Network (OSTI)

is to the exchange-correlation energy as a functional of the density. A large part of the total energy, the kinetic contexts. For finite systems these forms integrate to the same global ki- netic energy, but they differTesting the kinetic energy functional: Kinetic energy density as a density functional Eunji Sim

Burke, Kieron

433

An experimental–numerical investigation of heat distribution and stress field in single- and multi-track laser cladding by a high-power direct diode laser  

Science Journals Connector (OSTI)

Abstract High-power direct diode laser (HPDDL) cladding offers several advantages in the laser surface modification and repair of high-value parts. The wider beam and uniform energy distribution in the direct diode laser provide a smooth heating and cooling cycle during the cladding process. Subsequently, lower dimensional distortion and thermally-induced stress occur during the process. In this paper, temperature evolution and molten pool dimensions as well as stress-and-strain fields were studied by utilizing experimental and numerical methods. A three-dimensional (3D) transient uncoupled thermo-elastic–plastic model was developed to simulate a thermal process during the single- and multi-track laser cladding and the thermally-induced residual stress in the laser cladding. The effect of latent heat and phase transformations are considered in the thermal analysis. The numerical results were validated by experimentally-measured values, and the maximum prediction error was 3.5%. The experimental results were collected by in-situ monitoring techniques (e.g., thermocouples and a high-speed CCD camera). The level of residual stresses at the cladded surfaces were measured by an X-ray diffractometer. In addition, the effect of scanning speed on the thermal and stress evolution was quantitatively discussed.

Parisa Farahmand; Radovan Kovacevic

2014-01-01T23:59:59.000Z

434

Power combination of two phase-locked high power microwave beams from a new coaxial microwave source based on dual beams  

SciTech Connect

The new coaxial high power microwave source based on dual beams has demonstrated two phase-locked output microwave beams generated by its two sub-sources. In order to achieve a single higher output power, we present a three-port waveguide-based power combiner to combine the two microwave beams. Particle-in-cell simulation results show that when the diode voltage is 675?kV and the guiding magnetic field is 0.8?T, a combined microwave with an average power of about 4.0?GW and a frequency of 9.74 GHz is generated; the corresponding power conversion efficiency is 29%. The combination effect of the combiner is further validated in the diode voltage range from 675?kV to 755?kV as well as in the pulse regime. The simulations indicate that the maximum surface axial electric field strength of the electrodynamic structure is 720?kV/cm, which is relatively low corresponding to an output power of 4.0?GW. The stable combined output suggests the probability of long-pulse operation for the combined source.

Li, Yangmei; Zhang, Xiaoping, E-mail: plinafly@163.com; Zhang, Jiande; Dang, Fangchao; Yan, Xiaolu [College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2014-10-15T23:59:59.000Z

435

Kinetic roughening on curved interfaces  

E-Print Network (OSTI)

Stochastic growth phenomena on curved interfaces have not been explored in so much detail as their planar counterparts. The independence of the interface macroscopic shape on kinetic roughening has been occasionally assumed, but however, this fact can not be considered as universal. Stochastic partial differential equations on curved interfaces present dynamical and morphological properties that are completely different from their planar equivalents. Herein we will concentrate on equations which planar counterparts are linear. The fundamental differences are the loss of correlation of the interface through time for models showing sub-ballistic propagation of the correlations and the irrelevance of the noise in two and higher dimensional settings. We analyze some of these processes in detail, exploring why these consequences arise, and show that they tend to appear irrespective of the particular metric, provided that it is not Euclidean. Models showing a super-ballistic propagation of correlations present a fl...

Escudero, Carlos

2008-01-01T23:59:59.000Z

436

Decohesion Kinetics in Polymer Organic Solar Cells  

Science Journals Connector (OSTI)

Decohesion Kinetics in Polymer Organic Solar Cells ... We investigate the role of molecular weight (MW) of the photoactive polymer poly(3-hexylthiophene) (P3HT) on the temperature-dependent decohesion kinetics of bulk heterojunction (BHJ) organic solar cells (OSCs). ... fullerenes; solar cells; thin films; fracture; polymer ...

Christopher Bruner; Fernando Novoa; Stephanie Dupont; Reinhold Dauskardt

2014-11-04T23:59:59.000Z

437

Kinetics of Non-Thermal Atmospheric Pressure  

E-Print Network (OSTI)

Kinetics of Non-Thermal Atmospheric Pressure Plasmas Alexander Fridman · Microdischarge Interaction and Structuring in Dielectric Barrier Discharges · Kinetics of Blood Coagulation in Plasma · Surface Wound wire Area of DBD plasma region: ~104cm2 #12;7 Microdischarge Patterning (2D) R22 R23 R24 R26 R27 R28

Kaganovich, Igor

438

Chemical kinetics and oil shale process design  

SciTech Connect

Oil shale processes are reviewed with the goal of showing how chemical kinetics influences the design and operation of different processes for different types of oil shale. Reaction kinetics are presented for organic pyrolysis, carbon combustion, carbonate decomposition, and sulfur and nitrogen reactions.

Burnham, A.K.

1993-07-01T23:59:59.000Z

439

ADVANCES IN ENVIRONMENTAL REACTION KINETICS AND THERMODYNAMICS  

E-Print Network (OSTI)

1262 ADVANCES IN ENVIRONMENTAL REACTION KINETICS AND THERMODYNAMICS: LONG-TERM FATE thermodynamic and kinetic data is available with regard to the formation of these mixed metal precipitate phases to six months from the initial addition of aqueous nickel. Additionally, we have determined thermodynamic

Sparks, Donald L.

440

Chemical Kinetic Modeling of Non-Petroleum Based Fuels | Department...  

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

ft010pitz2012o.pdf More Documents & Publications Chemical Kinetic Modeling of Non-Petroleum Based Fuels Chemical Kinetic Modeling of Fuels Chemical Kinetic Research on HCCI &...

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Direct Visualization of Initial SEI Morphology and Growth Kinetics...  

NLE Websites -- All DOE Office Websites (Extended Search)

Initial SEI Morphology and Growth Kinetics During Lithium Deposition by in situ Electrochemical Direct Visualization of Initial SEI Morphology and Growth Kinetics During Lithium...

442

Transport-controlled kinetics of dissolution and precipitation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Transport-controlled kinetics of dissolution and precipitation in the sediments under alkaline and saline conditions . Transport-controlled kinetics of dissolution and...

443

Studying The Kinetics Of Crystalline Silicon Nanoparticle Lithiation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Studying The Kinetics Of Crystalline Silicon Nanoparticle Lithiation With In-Situ Transmission Electron Microscopy. Studying The Kinetics Of Crystalline Silicon Nanoparticle...

444

Global Optimization of Chemical Reactors and Kinetic Optimization  

E-Print Network (OSTI)

Model; 3-D; Monolith; Reactor; Optimization Introduction TheAngeles Global Optimization of Chemical Reactors and KineticGlobal Optimization of Chemical Reactors and Kinetic

ALHUSSEINI, ZAYNA ISHAQ

2013-01-01T23:59:59.000Z

445

Structure, Kinetics, and Thermodynamics of the Aqueous Uranyl...  

NLE Websites -- All DOE Office Websites (Extended Search)

Kinetics, and Thermodynamics of the Aqueous Uranyl(VI) Cation. Structure, Kinetics, and Thermodynamics of the Aqueous Uranyl(VI) Cation. Abstract: Molecular simulation techniques...

446

Microscale Electrode Design Using Coupled Kinetic, Thermal and...  

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

Microscale Electrode Design Using Coupled Kinetic, Thermal and Mechanical Modeling Microscale Electrode Design Using Coupled Kinetic, Thermal and Mechanical Modeling 2010 DOE...

447

Microscale Electrode Design Using Coupled Kinetic, Thermal and...  

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

Microscale Electrode Design Using Coupled Kinetic, Thermal and Mechanical Modeling Microscale Electrode Design Using Coupled Kinetic, Thermal and Mechanical Modeling 2009 DOE...

448

Coupled Kinetic, Thermal, and Mechanical Modeling of FIB Micro...  

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

Coupled Kinetic, Thermal, and Mechanical Modeling of FIB Micro-machined Electrodes Coupled Kinetic, Thermal, and Mechanical Modeling of FIB Micro-machined Electrodes 2010 DOE...

449

Benchmark Reaction Mechanisms and Kinetics for Lean NOx Traps...  

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

Benchmark Reaction Mechanisms and Kinetics for Lean NOx Traps Development of Chemical Kinetic Models for Lean NOx Traps Modeling the Regeneration Chemistry of Lean NOx Traps...

450

Experimentally determined dissolution kinetics of Na-rich borosilicate...  

NLE Websites -- All DOE Office Websites (Extended Search)

Experimentally determined dissolution kinetics of Na-rich borosilicate glass at far from equilibrium conditions: Implications Experimentally determined dissolution kinetics of...

451

Modeling of Reactor Kinetics and Dynamics  

SciTech Connect

In order to model a full fuel cycle in a nuclear reactor, it is necessary to simulate the short time-scale kinetic behavior of the reactor as well as the long time-scale dynamics that occur with fuel burnup. The former is modeled using the point kinetics equations, while the latter is modeled by coupling fuel burnup equations with the kinetics equations. When the equations are solved simultaneously with a nonlinear equation solver, the end result is a code with the unique capability of modeling transients at any time during a fuel cycle.

Matthew Johnson; Scott Lucas; Pavel Tsvetkov

2010-09-01T23:59:59.000Z

452

Kinetic equilibrium reconstruction on EAST tokamak  

Science Journals Connector (OSTI)

Plasma equilibrium is an important basis for tokamak plasma research. The equilibrium reconstructed from experimental diagnostics is a key element for experiments analysis and for theory study. The kinetic equilibrium has the profiles information (current or safety factor profile, kinetic pressure profile), which are key issues for some studies of physics. With the constraints of magnetic measurements, pressure profile and edge current profile, we achieved the first reconstructed kinetic equilibrium on EAST tokamak. The pressure and edge current profiles are based on the diagnostics and theoretical bootstrap current model. The kinetic equilibrium has the pedestal structure for H-mode plasma, which the magnetic reconstruction missed. This improved equilibrium is an important basis for some experimental analysis and theory studies on EAST.

G Q Li; Q L Ren; J P Qian; L L Lao; S Y Ding; Y J Chen; Z X Liu; B Lu; Q Zang

2013-01-01T23:59:59.000Z

453

Kinetics of ethanol dehydrogenation into ethyl acetate  

Science Journals Connector (OSTI)

The kinetics of gas-phase dehydrogenation of ethanol into ethyl acetate over a copper-zinc- ... means to design a reactor for dehydrogenation of ethanol into ethyl acetate in different regimes.

V. A. Men’shchikov; L. Kh. Gol’dshtein; I. P. Semenov

2014-01-01T23:59:59.000Z

454

High-power radio frequency pulse generation and extration based on wakefield excited by an intense charged particle beam in dielectric-loaded waveguides.  

SciTech Connect

Power extraction using a dielectric-loaded (DL) waveguide is a way to generate high-power radio frequency (RF) waves for future particle accelerators, especially for two-beam-acceleration. In a two-beam-acceleration scheme, a low-energy, high-current particle beam is passed through a deceleration section of waveguide (decelerator), where the power from the beam is partially transferred to trailing electromagnetic waves (wakefields); then with a properly designed RF output coupler, the power generated in the decelerator is extracted to an output waveguide, where finally the power can be transmitted and used to accelerate another usually high-energy low-current beam. The decelerator, together with the RF output coupler, is called a power extractor. At Argonne Wakefield Accelerator (AWA), we designed a 7.8GHz power extractor with a circular DL waveguide and tested it with single electron bunches and bunch trains. The output RF frequency (7.8GHz) is the sixth harmonic of the operational frequency (1.3GHz) of the electron gun and the linac at AWA. In single bunch excitation, a 1.7ns RF pulse with 30MW of power was generated by a single 66nC electron bunch passing through the decelerator. In subsequent experiments, by employing different splitting-recombining optics for the photoinjector laser, electron bunch trains were generated and thus longer RF pulses could be successfully generated and extracted. In 16-bunch experiments, 10ns and 22ns RF pulses have been generated and extracted; and in 4-bunch experiments, the maximum power generated was 44MW with 40MW extracted. A 26GHz DL power extractor has also been designed to test this technique in the millimeter-wave range. A power level of 148MW is expected to be generated by a bunch train with a bunch spacing of 769ps and bunch charges of 20nC each. The arrangement for the experiment is illustrated in a diagram. Higher-order-mode (HOM) power extraction has also been explored in a dual-frequency design. By using a bunch train with a bunch spacing of 769ps and bunch charges of 50nC each, 90.4MW and 8.68MW of extracted power levels are expected to be reached at 20.8GHz and 35.1GHz, respectively. In order to improve efficiency in HOM power extraction, a novel technique has been proposed to suppress unintended modes.

Gao, F.; High Energy Physics; Illinois Inst. of Tech

2009-07-24T23:59:59.000Z

455

Mechanistic studies using kinetic isotope effects  

E-Print Network (OSTI)

MECHANISTIC STUDIES USING KINETIC ISOTOPE EFFECTS A Thesis by BRIAN E. SCHULMFIER Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requtrements for the degree of MASTER OF SCIENCE December... 1999 Major Subject: Chemistry MECHANISTIC STUDIES USING KINETIC ISOTOPE EFFECTS A Thesis by BRIAN E. SCHULMEIER Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved...

Schulmeier, Brian E.

2012-06-07T23:59:59.000Z

456

Kinetic decoupling of WIMPs: analytic expressions  

E-Print Network (OSTI)

We present a general expression for the values of the average kinetic energy and of the temperature of kinetic decoupling of a WIMP, valid for any cosmological model. We show an example of the usage of our solution when the Hubble rate has a power-law dependence on temperature, and we show results for the specific cases of kination cosmology and low- temperature reheating cosmology.

Visinelli, Luca

2015-01-01T23:59:59.000Z

457

Quintom scenario with mixed kinetic terms  

SciTech Connect

We examine an extension of the quintom scenario of dark energy, in which a canonical scalar field and a phantom field are coupled through a kinetic interaction. We perform a phase-space analysis and show that the kinetic coupling gives rise to novel cosmological behavior. In particular, we obtain both quintessence-like and phantomlike late-time solutions, as well as solutions that cross the phantom divide during the evolution of the Universe.

Saridakis, Emmanuel N. [College of Mathematics and Physics, Chongqing University of Posts and Telecommunications, Chongqing, 400065 (China); Weller, Joel M. [Department of Applied Mathematics, University of Sheffield, Hounsfield Road, Sheffield S3 7RH (United Kingdom)

2010-06-15T23:59:59.000Z

458

22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 1 Kinetic theory of Geodesic Acoustic  

E-Print Network (OSTI)

22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 1 Kinetic theory of Geodesic Acoustic Zonca, Liu Chen and Zhiyong Qiu #12;22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 2 Chen and Zhiyong Qiu #12;22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 3 2 Linear

Zonca, Fulvio

459

High-Power Zinc-Air Energy Storage: Enhanced Metal-Air Energy Storage System with Advanced Grid-Interoperable Power Electronics Enabling Scalability and Ultra-Low Cost  

SciTech Connect

GRIDS Project: Fluidic is developing a low-cost, rechargeable, high-power module for Zinc-air batteries that will be used to store renewable energy. Zinc-air batteries are traditionally found in small, non-rechargeable devices like hearing aids because they are well-suited to delivering low levels of power for long periods of time. Historically, Zinc-air batteries have not been as useful for applications which require periodic bursts of power, like on the electrical grid. Fluidic hopes to fill this need by combining the high energy, low cost, and long run-time of a Zinc-air battery with new chemistry providing high power, high efficiency, and fast response. The battery module could allow large grid-storage batteries to provide much more power on very short demand—the most costly kind of power for utilities—and with much more versatile performance.

None

2010-10-01T23:59:59.000Z

460

Council's Regional Hydropower Potential Scoping  

E-Print Network (OSTI)

Hydroelectric Association Lisa Larson, HDR Rick Miller, HDR Discussion of analysis Reaction? 2 #12;Objective Northwest Hydroelectric Association HDR, Inc. MWH Global Black & Veatch Bonneville Environmental

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Hydropower Appropriations | Department of Energy  

Office of Environmental Management (EM)

Water Power for a Clean Energy Future (Fact Sheet), Wind and Water Power Program (WWPP) Marine and Hydrokinetic Energy Projects Water Power Program: 2011 Peer Review Report...

462

Regulatory and Hydropower Policy (Minnesota)  

Energy.gov (U.S. Department of Energy (DOE))

These statutes establish the State's authority to “control and supervise activity that changes or will change the course, current, or cross section of public waters, including the construction,...

463

High Power Testing of a 17 GHz Photocathode RF Gun S.C. Chen, B.G. Danly, J. Gonichon, C.L. Lin, R.J. Temkin, S.R. Trotz, J.S. Wurtele,  

E-Print Network (OSTI)

High Power Testing of a 17 GHz Photocathode RF Gun S.C. Chen, B.G. Danly, J. Gonichon, C.L. Lin, R photocathode gun. The 11 2 cell, -mode, copper cavity was tested with 5-10 MW, 100 ns, 17.145 GHz pulses from without breakdown, a compact system, and high brightness. While existing RF guns operate from 144 M Hz

Wurtele, Jonathan

464

Proceedings of the XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, Edinburgh, UK 25-30 August 1996, SPIE Vol. 3092, ed. H.J. Baker, pp. 758-763 (1997).  

E-Print Network (OSTI)

Proceedings of the XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser of 20 mm were obtained in aluminum and 41 mm in carbon steel using an N2 gas assist and 5-6 kW of power study of cutting thick aluminum and steel with a chemical oxygen-iodine laser using an N2 or O2 gas

Carroll, David L.

465

7-Gate Kinetic AMPA Model Kinetics to match EPSCs from calyx of Held  

E-Print Network (OSTI)

7-Gate Kinetic AMPA Model · Kinetics to match EPSCs from calyx of Held · Multiple closed, open and EPSC amplitude Bruce Graham Department of Computing Science and Mathematics, University of Stirling, U, including the calyx of Held in the mammalian auditory system. Such depression may be mediated

Graham, Bruce

466

Chemical Kinetic Modeling of Advanced Transportation Fuels  

SciTech Connect

Development of detailed chemical kinetic models for advanced petroleum-based and nonpetroleum based fuels is a difficult challenge because of the hundreds to thousands of different components in these fuels and because some of these fuels contain components that have not been considered in the past. It is important to develop detailed chemical kinetic models for these fuels since the models can be put into engine simulation codes used for optimizing engine design for maximum efficiency and minimal pollutant emissions. For example, these chemistry-enabled engine codes can be used to optimize combustion chamber shape and fuel injection timing. They also allow insight into how the composition of advanced petroleum-based and non-petroleum based fuels affect engine performance characteristics. Additionally, chemical kinetic models can be used separately to interpret important in-cylinder experimental data and gain insight into advanced engine combustion processes such as HCCI and lean burn engines. The objectives are: (1) Develop detailed chemical kinetic reaction models for components of advanced petroleum-based and non-petroleum based fuels. These fuels models include components from vegetable-oil-derived biodiesel, oil-sand derived fuel, alcohol fuels and other advanced bio-based and alternative fuels. (2) Develop detailed chemical kinetic reaction models for mixtures of non-petroleum and petroleum-based components to represent real fuels and lead to efficient reduced combustion models needed for engine modeling codes. (3) Characterize the role of fuel composition on efficiency and pollutant emissions from practical automotive engines.

PItz, W J; Westbrook, C K; Herbinet, O

2009-01-20T23:59:59.000Z

467

Philips Color Kinetics | Open Energy Information  

Open Energy Info (EERE)

Color Kinetics Color Kinetics Jump to: navigation, search Name Philips Color Kinetics Address 3 Burlington Woods Drive, 4th Floor Place Burlington, Massachusetts Zip 01803 Sector Efficiency Product LED lighting systems Website http://www.colorkinetics.com/ Coordinates 42.5005723°, -71.2042619° 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":42.5005723,"lon":-71.2042619,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

468

Kinetic studies of elementary chemical reactions  

SciTech Connect

This program concerning kinetic studies of elementary chemical reactions is presently focussed on understanding reactions of NH{sub x} species. To reach this goal, the author is pursuing experimental studies of reaction rate coefficients and product branching fractions as well as using electronic structure calculations to calculate transition state properties and reaction rate calculations to relate these properties to predicted kinetic behavior. The synergy existing between the experimental and theoretical studies allow one to gain a deeper insight into more complex elementary reactions.

Durant, J.L. Jr. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

469

Pseudospin formulation of kinetic Ising models  

Science Journals Connector (OSTI)

It is shown that Glauber's kinetic Ising model is equivalent to an Ising model with multispin interactions in a transverse field. In one dimension, certain of Glauber's results are recovered by using the well-known fermion representation for spin-12.

Eric D. Siggia

1977-09-01T23:59:59.000Z

470

ERNSTMORITZARNDTUNIVERSITAT Absolute number density and kinetic analysis  

E-Print Network (OSTI)

and C2F4 molecules in pulsed CF4/H2 rf plasmas I n a u g u r a l d i s s e r t a t i o n zur Erlangung and kinetics of the target species in pulsed CF4/H2 rf plasmas 69 5.1 Plasma process parameters selected

Greifswald, Ernst-Moritz-Arndt-Universität

471

Kinetics of Anionic Surfactant Anoxic Degradation  

E-Print Network (OSTI)

) is the surfactant commonly used in space habitation. The two biofilm models differ in that one assumes a constant biofilm density and the other allows biofilm density changes based on space occupancy theory. Extant kinetic analysis of a mixed microbial culture using...

Camacho, Julianna G.

2010-07-14T23:59:59.000Z

472

STATISTICAL ANALYSIS OF PROTEIN FOLDING KINETICS  

E-Print Network (OSTI)

STATISTICAL ANALYSIS OF PROTEIN FOLDING KINETICS AARON R. DINNER New Chemistry Laboratory for Protein Folding: Advances in Chemical Physics, Volume 120. Edited by Richard A. Friesner. Series Editors Experimental and theoretical studies have led to the emergence of a unified general mechanism for protein

Dinner, Aaron

473

Chemical Kinetic Modeling of Non-Petroleum Based Fuels | Department...  

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

ft010pitz2011o.pdf More Documents & Publications Chemical Kinetic Modeling of Non-Petroleum Based Fuels Chemical Kinetic Modeling of Fuels Simulation of High Efficiency Clean...

474

Direct kinetic correlation of carriers and ferromagnetism in...  

NLE Websites -- All DOE Office Websites (Extended Search)

kinetic correlation of carriers and ferromagnetism in Co2+ : ZnO. Direct kinetic correlation of carriers and ferromagnetism in Co2+ : ZnO. Abstract: We report the use of controlled...

475

Ethylbenzene dehydrogenation into styrene: kinetic modeling and reactor simulation  

E-Print Network (OSTI)

detailed kinetic model for coke formation and gasification, which was coupled to the kinetic model for the main reactions. The calculation of the dynamic equilibrium coke content provided a crucial guideline for the selection of the steam to ethylbenzene...

Lee, Won Jae

2007-04-25T23:59:59.000Z

476

Kinetic modelling of the thermal decomposition of ettringite into metaettringite  

E-Print Network (OSTI)

1 Kinetic modelling of the thermal decomposition of ettringite into metaettringite J. Pourchez recent insights into thermal stability and decomposition mechanisms of ettringite, a lack of knowledge isothermal conditions. Keywords: ettringite, metaettringite, thermal decomposition, kinetic modelling. 1

Boyer, Edmond

477

Chemical Kinetics Research on HCCI and Diesel Fuels  

Energy.gov (U.S. Department of Energy (DOE))

Discusses detailed chemical kinetics mechanisms for complex hydrocarbon fuels and computationally efficiecnt, accurate methodologies for modeling advanced combustion strategies.

478

Rotational and divergent kinetic energy in the mesoscale model ALADIN  

E-Print Network (OSTI)

Rotational and divergent kinetic energy in the mesoscale model ALADIN By V. BLAZ ICA1 *, N. Z AGAR1 received 7 June 2012; in final form 7 March 2013) ABSTRACT Kinetic energy spectra from the mesoscale. It is shown that about 50% of kinetic energy in the free troposphere in ALADIN is divergent energy

Zagar, Nedjeljka

479

Quantitative Spreading Kinetics of a Three Molecular Layer Liquid Patch  

Science Journals Connector (OSTI)

Quantitative Spreading Kinetics of a Three Molecular Layer Liquid Patch ... The late stage kinetics of the spreading of a smectic nanodrop on a solid surface was investigated by direct and real time imaging of a three molecular layer patch using the SEEC microscopy. ... (15) At some stage of the spreading kinetics, the structure reduces to a single bilayer patch lying on the surface monolayer. ...

Olivier Noel; Jean-Luc Buraud; Laurent Berger; Dominique Ausserre?

2010-03-19T23:59:59.000Z

480

Worldwide Oil Production Michaelis-Menten Kinetics Correlation and Regression  

E-Print Network (OSTI)

Worldwide Oil Production Michaelis-Menten Kinetics Topic 4 Correlation and Regression Transformed Variables 1 / 13 #12;Worldwide Oil Production Michaelis-Menten Kinetics Outline Worldwide Oil Production Michaelis-Menten Kinetics Lineweaver-Burke double reciprocal plot 2 / 13 #12;Worldwide Oil Production

Watkins, Joseph C.

Note: This page contains sample records for the topic "high-power kinetic hydropower" 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

Hydroelectric power provides a cheap source of electricity with few carbon emissions. Yet, reservoirs are not operated sustainably, which we define as meeting societal needs for water and power while protecting long-term health of the river ecosystem. Reservoirs that generate hydropower are typically operated with the goal of maximizing energy reve  

SciTech Connect

Hydroelectric power provides a cheap source of electricity with few carbon emissions. Yet, reservoirs are not operated sustainably, which we define as meeting societal needs for water and power while protecting long-term health of the river ecosystem. Reservoirs that generate hydropower are typically operated with the goal of maximizing energy revenue, while meeting other legal water requirements. Reservoir optimization schemes used in practice do not seek flow regimes that maximize aquatic ecosystem health. Here, we review optimization studies that considered environmental goals in one of three approaches. The first approach seeks flow regimes that maximize hydropower generation, while satisfying legal requirements, including environmental (or minimum) flows. Solutions from this approach are often used in practice to operate hydropower projects. In the second approach, flow releases from a dam are timed to meet water quality constraints on dissolved oxygen (DO), temperature and nutrients. In the third approach, flow releases are timed to improve the health of fish populations. We conclude by suggesting three steps for bringing multi-objective reservoir operation closer to the goal of ecological sustainability: (1) conduct research to identify which features of flow variation are essential for river health and to quantify these relationships, (2) develop valuation methods to assess the total value of river health and (3) develop optimal control softwares that combine water balance modelling with models that predict ecosystem responses to flow.

Jager, Yetta [ORNL; Smith, Brennan T [ORNL

2008-02-01T23:59:59.000Z

482

E-Print Network 3.0 - approximate kinetic equations Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

equation. Reactor kinetics and Summary: equations, prompt jump approximation; subcritical reactor kinetics, circulating fuel reactor dynamics 5... solution to neutron...

483

Ion mediated crosslink driven mucous swelling kinetics  

E-Print Network (OSTI)

We present an experimentally guided, multi-phasic, multi-species ionic gel model to compare and make qualitative predictions on the rheology of mucus of healthy individuals (Wild Type) versus those infected with Cystic Fibrosis. The mixture theory consists of the mucus (polymer phase) and water (solvent phase) as well as several different ions: H+, Na+ and Ca++. The model is linearized to study the hydration of spherically symmetric mucus gels and calibrated against the experimental data of mucus diffusivities. Near equilibrium, the linearized form of the equation describing the radial size of the gel, reduces to the well-known expression used in the kinetic theory of swelling hydrogels. Numerical studies reveal that the Donnan potential is the dominating mechanism driving the mucus swelling/deswelling transition. However, the altered swelling kinetics of the Cystic Fibrosis infected mucus is not merely governed by the hydroelectric composition of the swelling media, but also due to the altered movement of el...

Sircar, S

2015-01-01T23:59:59.000Z

484

ET Kinetics of Bifunctional Redox Protein Maquettes  

NLE Websites -- All DOE Office Websites (Extended Search)

Kinetics of Bifunctional Redox Protein Maquettes Kinetics of Bifunctional Redox Protein Maquettes Mitchell W. Mutz, James F. Wishart and George L. McLendon Adv. Chem Ser. 254, Ch. 10, pp. 145-159 Abstract: We prepared three bifunctional redox protein maquettes based on 12-, 16-, and 20-mer three-helix bundles. In each case, the helix was capped with a Co(III) tris-bipyridyl electron acceptor and also functionalized with a C-terminal viologen (1-ethyl-1'-ethyl-4,4'-bipyridinium) donor. Electron transfer (ET) was initiated by pulse radiolysis and flash photolysis and followed spectrometrically to determined average, concentration-independent, first-order rates for the 16-mer and 20-mer maquettes. For the 16-mer bundle, the alpha-helical content was adjusted by the addition of urea or trifluoroethanol to solutions containing the metalloprotein. This

485

Kinetic Ising Model of the Glass Transition  

Science Journals Connector (OSTI)

A graph theory of single-spin-flip kinetic Ising models is developed and applied to a class of spin models with strongly cooperative dynamics. Self-consistent approximations for the spin time correlation function are presented. One of the dynamical models exhibits a glass transition with no underlying thermodynamic singularity. The approximation for the time correlation function predicts a critical temperature, below which small fluctuations from equilibrium in the thermodynamic limit cannot relax in a finite amount of time.

Glenn H. Fredrickson and Hans C. Andersen

1984-09-24T23:59:59.000Z

486

Chemical kinetics models for semiconductor processing  

SciTech Connect

Chemical reactions in the gas-phase and on surfaces are important in the deposition and etching of materials for microelectronic applications. A general software framework for describing homogeneous and heterogeneous reaction kinetics utilizing the Chemkin suite of codes is presented. Experimental, theoretical and modeling approaches to developing chemical reaction mechanisms are discussed. A number of TCAD application modules for simulating the chemically reacting flow in deposition and etching reactors have been developed and are also described.

Coltrin, M.E.; Creighton, J.R. [Sandia National Labs., Albuquerque, NM (United States); Meeks, E.; Grcar, J.F.; Houf, W.G. [Sandia National Labs., Livermore, CA (United States); Kee, R.J. [Colorado School of Mines, Golden, CO (United States)

1997-12-31T23:59:59.000Z

487

Model of the Kinetics of Polymorphous Crystallization  

Science Journals Connector (OSTI)

We propose a phase-field model for the kinetics of isothermal crystallization of an amorphous solid at a concentration nearly equal to the equilibrium crystal stochiometry. The model utilizes two coupled fields: a nonconserved ordering vector field which describes the local lattice structure and a conserved nonordering scalar field describing the local atomic composition. Results of large-scale computer simulations are reported which can be compared with experiments.

B. Morin; K. R. Elder; M. Sutton; Martin Grant

1995-09-11T23:59:59.000Z

488

Kinetics of atoms in a bichromatic field  

SciTech Connect

The kinetics of atoms in a bichromatic field is considered. Analytic solutions are obtained for the force, friction coefficient, and diffusion coefficient in the model of a two-level atom without limitations imposed on the intensity of light fields. This effect is observed in the domain of global minima and maxima of the optical potential (i.e., at points where the relative phase of two standing waves is Greek-Phi-Symbol = 0, {pi}/2.

Prudnikov, O. N., E-mail: llf@laser.nsc.ru [Novosibirsk State University (Russian Federation); Baklanov, A. S. [Russian Academy of Sciences, Institute of Laser Physics, Siberian Branch (Russian Federation)] [Russian Academy of Sciences, Institute of Laser Physics, Siberian Branch (Russian Federation); Taichenachev, A. V. [Novosibirsk State University (Russian Federation)] [Novosibirsk State University (Russian Federation); Tumaikin, A. M. [Russian Academy of Sciences, Institute of Laser Physics, Siberian Branch (Russian Federation)] [Russian Academy of Sciences, Institute of Laser Physics, Siberian Branch (Russian Federation); Yudin, V. I. [Novosibirsk State University (Russian Federation)] [Novosibirsk State University (Russian Federation)

2013-08-15T23:59:59.000Z

489

Isothermal kinetics of new Albany oil shale  

SciTech Connect

From the development of technologies for the utilization of eastern U.S. oil shales, fluidized bed pyrolysis technology is emerging as one of the most promising in terms of oil yield, operating cost, and capital investment. Bench-scale testing of eastern shales has reached a level where scale-up represents the next logical step in the evolution of this technology. A major consideration in this development and an essential part of any fluidized bed reactor scale-up effort--isothermal kinetics-- has largely been ignored for eastern US shale with the exception of a recent study conducted by Richardson et al. with a Cleveland shale. The method of Richardson et al. was used previously by Wallman et al. with western shale and has been used most recently by Forgac, also with western shale. This method, adopted for the present study, entails injecting a charge of shale into a fluidized bed and monitoring the hydrocarbon products with a flame ionization detector (FID). Advantages of this procedure are that fluidized bed heat-up effects are simulated exactly and real-time kinetics are obtained due to the on-line FID. Other isothermal methods have suffered from heat-up and cool-down effects making it impossible to observe the kinetics at realistic operating temperatures. A major drawback of the FID approach, however, is that no differentiation between oil and gas is possible.

Carter, S.D.

1987-04-01T23:59:59.000Z

490

Kinetic regulation of coated vesicle secretion  

E-Print Network (OSTI)

The secretion of vesicles for intracellular transport often rely on the aggregation of specialized membrane-bound proteins into a coat able to curve cell membranes. The nucleation and growth of a protein coat is a kinetic process that competes with the energy-consuming turnover of coat components between the membrane and the cytosol. We propose a generic kinetic description of coat assembly and the formation of coated vesicles, and discuss its implication to the dynamics of COP vesicles that traffic within the Golgi and with the Endoplasmic Reticulum. We show that stationary coats of fixed area emerge from the competition between coat growth and the recycling of coat components, in a fashion resembling the treadmilling of cytoskeletal filaments. We further show that the turnover of coat components allows for a highly sensitive switching mechanism between a quiescent and a vesicle producing membrane, upon a slowing down of the exchange kinetics. We claim that the existence of this switching behaviour, also triggered by factors such as the presence of cargo and variation of the membrane mechanical tension, allows for efficient regulation of vesicle secretion. We propose a model, supported by different experimental observations, in which vesiculation of secretory membranes is impaired by the energy consuming desorption of coat proteins, until the presence of cargo or other factors triggers a dynamical switch into a vesicle producing state.

Lionel Foret; Pierre Sens

2008-07-28T23:59:59.000Z

491

Energy Conservation Tests of a Coupled Kinetic-kinetic Plasma-neutral Transport Code  

SciTech Connect

A Monte Carlo neutral transport routine, based on DEGAS2, has been coupled to the guiding center ion-electron-neutral neoclassical PIC code XGC0 to provide a realistic treatment of neutral atoms and molecules in the tokamak edge plasma. The DEGAS2 routine allows detailed atomic physics and plasma-material interaction processes to be incorporated into these simulations. The spatial pro le of the neutral particle source used in the DEGAS2 routine is determined from the uxes of XGC0 ions to the material surfaces. The kinetic-kinetic plasma-neutral transport capability is demonstrated with example pedestal fueling simulations.

D.P. Stotler, C.S. Chang, S.H. Ku, J. Lang and G. Park

2012-08-29T23:59:59.000Z

492

Pedestal Fueling Simulations with a Coupled Kinetic-kinetic Plasma-neutral Transport Code  

SciTech Connect

A Monte Carlo neutral transport routine, based on DEGAS2, has been coupled to the guiding center ion-electron-neutral neoclassical PIC code XGC0 to provide a realistic treatment of neutral atoms and molecules in the tokamak edge plasma. The DEGAS2 routine allows detailed atomic physics and plasma-material interaction processes to be incorporated into these simulations. The spatial pro le of the neutral particle source used in the DEGAS2 routine is determined from the uxes of XGC0 ions to the material surfaces. The kinetic-kinetic plasma-neutral transport capability is demonstrated with example pedestal fueling simulations.

D.P. Stotler, C.S. Chang, S.H. Ku, J. Lang and G.Y. Park

2012-08-29T23:59:59.000Z

493

Kinetic equation for the Ising model  

Science Journals Connector (OSTI)

A time-dependent projection-operator formalism is used to derive a kinetic equation for the single-spin density operator in an Ising system of N two-state spins in weak interaction with a heat bath. This equation contains a contribution at the self-consistent-field level and also higher-order contributions due to dynamically generated correlations. A detailed evaluation of the self-consistent-field terms is made. Possibilities for generalizing the method to obtain equations for multispin density operators are discussed.

Michael R. Emptage; Paul Hawrylak; Subir K. Bose

1982-12-01T23:59:59.000Z

494

Hamiltonian approach to kinetic Ising models  

Science Journals Connector (OSTI)

In the framework of the quantum approach to stochastic dynamics, the master equations governing the temporal evolution of the kinetic Ising models (KIM) are cast in the form of imaginary-time Schrödinger equations with second-quantized Hermitian Hamiltonians. On the basis of the quantum formalism a classical evolution equation is derived for an effective time-dependent Ising-type Hamiltonian. The grand ensemble corresponding to the latter describes the statistics of the spin configurations evolving under the dynamics of the KIM. The latter approach was used to qualitatively explain the results of recent Monte Carlo simulations of the Kawasaki KIM. © 1996 The American Physical Society.

V. I. Tokar

1996-02-01T23:59:59.000Z

495

Studies of combustion kinetics and mechanisms  

SciTech Connect

The objective of the current research is to gain new quantitative knowledge of the kinetics and mechanisms of polyatomic free radicals which are important in hydrocarbon combustion processes. The special facility designed and built for these (which includes a heatable tubular reactor coupled to a photoionization mass spectrometer) is continually being improved. Where possible, these experimental studies are coupled with theoretical ones, sometimes conducted in collaboration with others, to obtain an improved understanding of the factors determining reactivity. The decomposition of acetyl radicals, isopropyl radicals, and n-propyl radicals have been studied as well as the oxidation of methylpropargyl radicals.

Gutman, D. [Catholic Univ. of America, Washington, DC (United States)

1993-12-01T23:59:59.000Z

496

Kinetic equilibration from a radiative transport  

E-Print Network (OSTI)

Kinetic equilibration during the early stage of a relativistic heavy ion collision is studied using a radiative transport model. Thermalization is found to dominate over expansion with medium regulated cross sections. Pressure anisotropy shows an approximate alpha_s scaling when radiative processes are included. It approaches an asymptotic time evolution on a time scale of 1 to 2 fm/c. Energy density is also found to approach an asymptotic time evolution that decreases slower than the ideal hydro evolution. These observations indicate that viscosity is important during the early longitudinal expansion phase of a relativistic heavy ion collision.

Bin Zhang

2009-03-11T23:59:59.000Z

497

Kinetic analysis of dynamic PET data  

SciTech Connect

Our goal is to quantify regional physiological processes such as blood flow and metabolism by means of tracer kinetic modeling and positron emission tomography (PET). Compartmental models are one way of characterizing the behavior of tracers in physiological systems. This paper describes a general method of estimating compartmental model rate constants from measurements of the concentration of tracers in blood and tissue, taken at multiple time intervals. A computer program which applies the method is described, and examples are shown for simulated and actual data acquired from the Donner 280-Crystal Positron Tomograph.

Knittel, B.

1983-12-01T23:59:59.000Z

498

{sup 129}Xe-Cs (D{sub 1},D{sub 2}) versus {sup 129}Xe-Rb (D{sub 1}) spin-exchange optical pumping at high xenon densities using high-power laser diode arrays  

SciTech Connect

We investigate {sup 129}Xe-Cs (D{sub 1},D{sub 2}) spin exchange optical pumping (SEOP) at high Xe densities ({approx}0.12-2.44 amagat) using newly available high-power (>40 W) laser diode arrays and compare with {sup 129}Xe-Rb D{sub 1} SEOP under similar conditions. At elevated Xe densities, the spin-exchange rate (per alkali-metal atom, {gamma}{sup '}) for Cs-{sup 129}Xe is {approx}1.5-fold greater than that for Rb-{sup 129}Xe. Higher spin-exchange rates and lower {sup 129}Xe spin-destruction rates for Cs-{sup 129}Xe versus Rb-{sup 129}Xe contribute to {approx}twofold improvement in {sup 129}Xe nuclear spin polarization measured at 9.4 T - with the largest gains observed at the highest Xe densities.

Whiting, Nicholas; Eschmann, Neil A.; Goodson, Boyd M.; Barlow, Michael J. [Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901 (United States); Sir Peter Mansfield Magnetic Resonance Centre, University of Nottingham, Nottingham, NG7 2RD (United Kingdom)

2011-05-15T23:59:59.000Z

499

Adding linear kinetic effects to existing finite-difference simulations  

SciTech Connect

We present the proof-of-principle KINETIC-J module for iterative addition of all-order kinetic effects (parallel and perpendicular) in both the IC and EC frequency ranges, to any existing FD or FE frequency-domain full-wave RF simulation. The module calculates the linear, kinetic plasma current, such that given f 0 (r,v) and the cold plasma solution as an initial guess at the wave electric field, iterating the KINETIC-J module and the existing code (its internal plasma current replaced with the output of the module) converges to the kinetic solution. Since KINETIC-J does not use the k-space representation of the hot plasma dielectric, in favor of data parallel numeric integrals, implementing the module requires minimal code changes.

Green, David L [ORNL; Berry, Lee Alan [XCEL Engineering Inc., Oak Ridge

2013-01-01T23:59:59.000Z

500

Analysis of a kinetic multi-segment foot model part II: Kinetics and clinical implications  

Science Journals Connector (OSTI)

Kinematic multi-segment foot models have seen increased use in clinical and research settings, but the addition of kinetics has been limited and hampered by measurement limitations and modeling assumptions. In this second of two companion papers, we complete the presentation and analysis of a three segment kinetic foot model by incorporating kinetic parameters and calculating joint moments and powers. The model was tested on 17 pediatric subjects (ages 7–18 years) during normal gait. Ground reaction forces were measured using two adjacent force platforms, requiring targeted walking and the creation of two sub-models to analyze ankle, midtarsal, and 1st metatarsophalangeal joints. Targeted walking resulted in only minimal kinematic and kinetic differences compared with walking at self selected speeds. Joint moments and powers were calculated and ensemble averages are presented as a normative database for comparison purposes. Ankle joint powers are shown to be overestimated when using a traditional single-segment foot model, as substantial angular velocities are attributed to the mid-tarsal joint. Power transfer is apparent between the 1st metatarsophalangeal and mid-tarsal joints in terminal stance/pre-swing. While the measurement approach presented here is limited to clinical populations with only minimal impairments, some elements of the model can also be incorporated into routine clinical gait analysis.

Dustin A. Bruening; Kevin M. Cooney; Frank L. Buczek

2012-01-01T23:59:59.000Z