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Note: This page contains sample records for the topic "kinetics flywheel energy" from the National Library of EnergyBeta (NLEBeta).
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1

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

2

Flywheel Energy Storage Module  

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

kWh/100 kW kWh/100 kW Flywheel Energy Storage Module * 100KWh - 1/8 cost / KWh vs. current State of the Art * Bonded Magnetic Bearings on Rim ID * No Shaft / Hub (which limits surface speed) * Flexible Motor Magnets on Rim ID * Develop Touch-down System for Earthquake Flying Rim Eliminate Shaft and Hub Levitate on Passive Magnetic Bearings Increase Rim Tip Speed Larger Diameter Thinner Rim Stores More Energy 4 X increase in Stored Energy with only 60% Increase in Weight Development of a 100 kWh/100 kW Flywheel Energy Storage Module High Speed, Low Cost, Composite Ring with Bore-Mounted Magnetics Current State of the Art Flywheel Limitations of Existing Flywheel * 15 Minutes of storage * Limited to Frequency Regulation Application * Rim Speed (Stored Energy) Limited by Hub Strain and Shaft Dynamics

3

Flywheel energy and power storage systems  

Science Journals Connector (OSTI)

For ages flywheels have been used to achieve smooth operation of machines. The early models where purely mechanical consisting of only a stone wheel attached to an axle. Nowadays flywheels are complex constructions where energy is stored mechanically and transferred to and from the flywheel by an integrated motor/generator. The stone wheel has been replaced by a steel or composite rotor and magnetic bearings have been introduced. Today flywheels are used as supplementary UPS storage at several industries world over. Future applications span a wide range including electric vehicles, intermediate storage for renewable energy generation and direct grid applications from power quality issues to offering an alternative to strengthening transmission. One of the key issues for viable flywheel construction is a high overall efficiency, hence a reduction of the total losses. By increasing the voltage, current losses are decreased and otherwise necessary transformer steps become redundant. So far flywheels over 10 kV have not been constructed, mainly due to isolation problems associated with high voltage, but also because of limitations in the power electronics. Recent progress in semi-conductor technology enables faster switching and lower costs. The predominant part of prior studies have been directed towards optimising mechanical issues whereas the electro technical part now seem to show great potential for improvement. An overview of flywheel technology and previous projects are presented and moreover a 200 kW flywheel using high voltage technology is simulated.

Björn Bolund; Hans Bernhoff; Mats Leijon

2007-01-01T23:59:59.000Z

4

Fact Sheet: Grid-Scale Flywheel Energy Storage Plant (October 2012)  

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

Hazle Spindle LLC Hazle Spindle LLC American Recovery and Reinvestment Act (ARRA) Beacon Power will design, build, and operate a utility-scale 20 MW flywheel energy storage plant at the Humboldt Industrial Park in Hazle Township, Pennsylvania for Hazle Spindle LLC, the Recipient of the ARRA Cooperative Agreement. The plant will provide frequency regulation services to grid operator PJM Interconnection. Flywheel systems are kinetic energy storage devices that react instantly when needed. By accelerating a cylindrical rotor (flywheel) to a very high speed and maintaining the energy in the system as rotational energy, flywheel energy storage systems can moderate fluctuations in grid demand. When generated power exceeds load, the flywheel speeds up; when load exceeds generation, the flywheel is slowed to convert the energy for

5

Stationary flywheel energy storage systems. Final report  

SciTech Connect

The aim of this system study is to find out industrial applications of Stationary Flywheel Energy Accumulators. The economic value for the consumer and the effects on the power supply grid should be investigated. As to overall economy, compensation of short time maximum power out-put seems to be more favorable at the power stations. An additional possibility for energy storage by flywheels is given where otherwise lost energy can be used effectively, according to the successful brake energy storage in vehicles. Under this aspect the future use of flywheels in wind-power-plants seems to be promising. Attractive savings of energy can be obtained by introducing modern flywheel technology for emergency power supply units which are employed for instance in telecommunication systems. Especially the application for emergency power supply, in power stations and in combination with wind energy converters needs further investigation.

Gilhaus, A.; Hau, E.; Gassner, G.; Huss, G.; Schauberger, H.

1982-01-01T23:59:59.000Z

6

Technologies for energy storage flywheels and super conducting magnetic energy storage  

SciTech Connect

A flywheel is an electromechanical storage system in which energy is stored in the kinetic energy of a rotating mass. Flywheel systems under development include those with steel flywheel rotors and resin/glass or resin/carbon-fiber composite rotors. The mechanics of energy storage in a flywheel system are common to both steel- and composite-rotor flywheels. In both systems, the momentum of the rotating rotor stores energy. The rotor contains a motor/generator that converts energy between electrical and mechanical forms. In both types of systems, the rotor operates in a vacuum and spins on bearings to reduce friction and increase efficiency. Steel-rotor systems rely mostly on the mass of the rotor to store energy while composite flywheels rely mostly on speed. During charging, an electric current flows through the motor increasing the speed of the flywheel. During discharge, the generator produces current flow out of the system slowing the wheel down. The basic characteristics of a Flywheel system are shown. Steel flywheel systems are currently being marketed in the US and Germany and can be connected in parallel to provide greater power if required. Sizes range from 40kW to 1.6MW for times of 5--120 seconds. At this time sales are limited but growing. The suppliers of the composite type flywheel systems are currently in the prototype stages of development. Flywheel systems offer several potential advantages. FES systems, as their developers envision them will have exceptionally long service lives and low life-cycle costs as a result of minimal O and M requirements. FES systems are compact and self-contained allowing them to be placed in tight quarters, and they contain no hazardous chemicals nor do they produce flammable gases.

BOYES,JOHN D.

2000-04-26T23:59:59.000Z

7

Fact Sheet: Grid-Scale Flywheel Energy Storage Plant | Department...  

Office of Environmental Management (EM)

Fact Sheet: Grid-Scale Flywheel Energy Storage Plant Fact Sheet: Grid-Scale Flywheel Energy Storage Plant Beacon Power will design, build, and operate a utility-scale 20 MW...

8

'Recycling' Grid Energy with Flywheel Technology | Department of Energy  

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

'Recycling' Grid Energy with Flywheel Technology 'Recycling' Grid Energy with Flywheel Technology 'Recycling' Grid Energy with Flywheel Technology September 30, 2010 - 5:03pm Addthis Seven-foot tall cylinders equipped with flywheel technology (shown above) will make up Beacon Power’s energy storage plant in Stephentown, N.Y. The company received a $43 million loan guarantee from the Energy Department to build the plant. | Photo courtesy of Beacon Power Corporation Seven-foot tall cylinders equipped with flywheel technology (shown above) will make up Beacon Power's energy storage plant in Stephentown, N.Y. The company received a $43 million loan guarantee from the Energy Department to build the plant. | Photo courtesy of Beacon Power Corporation Stephen Graff Former Writer & editor for Energy Empowers, EERE

9

Research on simulation of ship electric propulsion system with flywheel energy storage system  

Science Journals Connector (OSTI)

Flywheel energy storage has been widely used to improve the ground electric power quality. This paper designed a flywheel energy storage device to improve ship electric propulsion system power grid quality. The practical mathematical models of flywheel ...

Chunling Xie; Conghui Zhang; Jen-Yuan James Chang

2011-06-01T23:59:59.000Z

10

Flywheel energy storage using superconducting magnetic bearings  

SciTech Connect

Storage of electrical energy on a utility scale is currently not practicable for most utilities, preventing the full utilization of existing base-load capacity. A potential solution to this problem is Flywheel Energy Storage (FES), made possible by technological developments in high-temperature superconducting materials. Commonwealth Research Corporation (CRC), the research arm of Commonwealth Edison Company, and Argonne National Laboratory are implementing a demonstration project to advance the state of the art in high temperature superconductor (HTS) bearing performance and the overall demonstration of efficient Flywheel Energy Storage. Currently, electricity must be used simultaneously with its generation as electrical energy storage is not available for most utilities. Existing storage methods either are dependent on special geography, are too expensive, or are too inefficient. Without energy storage, electric utilities, such as Commonwealth Edison Company, are forced to cycle base load power plants to meet load swings in hourly customer demand. Demand can change by as much as 30% over a 12-hour period and result in significant costs to utilities as power plant output is adjusted to meet these changes. HTS FES systems can reduce demand-based power plant cycling by storing unused nighttime capacity until it is needed to meet daytime demand.

Abboud, R.G. [Commonwealth Research Corp., Chicago, IL (United States); Uherka, K.; Hull, J.; Mulcahy, T. [Argonne National Lab., IL (United States)

1994-04-01T23:59:59.000Z

11

High Speed Flywheels for Integrated Energy Storage and Attitude Control  

E-Print Network (OSTI)

High Speed Flywheels for Integrated Energy Storage and Attitude Control Christopher D. Hall. Decomposition of the space of internal torques separates the attitude control functionfrom the energy storage simultaneously performing energy storage and extraction operations. 1 Introduction The power engineering

Hall, Christopher D.

12

Optimization of cylindrical composite flywheel rotors for energy storage  

Science Journals Connector (OSTI)

We hope that our efforts will contribute towards the design of flywheel rotors that have higher energy densities and ... that this can contribute to a future electricity grid that can accommodate renewable energy...

Petrus J. Janse van Rensburg…

2013-01-01T23:59:59.000Z

13

Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel  

E-Print Network (OSTI)

Utilizing flywheels to store and reuse energy from regenerative braking on locomotives is a new technology being developed in the Vibration Control and Electromechanics Lab at Texas A&M. This thesis focuses on the motion analysis of a locomotive...

Zhang, Xiaohua

2011-02-22T23:59:59.000Z

14

Flywheel Project Escalates Grid Efficiency | Department of Energy  

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

Flywheel Project Escalates Grid Efficiency Flywheel Project Escalates Grid Efficiency Flywheel Project Escalates Grid Efficiency August 9, 2010 - 1:18pm Addthis Elizabeth Meckes Elizabeth Meckes Director of User Experience & Digital Technologies, Office of Public Affairs What does this project do? It's estimated to create 60 jobs in New York and Massachusetts (where Beacon Power is headquartered) and help bring clean technologies to market by improving the stability and reliability of the state's electric grid. More good news for New York State: in addition to last week's announcement on the AES energy storage project, the Energy Department has finalized a $43 million loan guarantee for Beacon Power Corporation's flywheel energy storage plant. Not only is the project estimated to create 60 jobs in New York and Massachusetts (where Beacon Power is

15

An overview of Boeing flywheel energy storage systems with high-temperature  

Science Journals Connector (OSTI)

An overview summary of recent Boeing work on high-temperature superconducting (HTS) bearings is presented. A design is presented for a small flywheel energy storage system that is deployable in a field installation. The flywheel is suspended by a HTS bearing whose stator is conduction cooled by connection to a cryocooler. At full speed, the flywheel has 5 kW h of kinetic energy, and it can deliver 3 kW of three-phase 208 V power to an electrical load. The entire system, which includes a containment structure, is compatible with transportation by forklift or crane. Laboratory measurements of the bearing loss are combined with the parasitic loads to estimate the efficiency of the system. Improvements in structural composites are expected to enable the operation of flywheels with very high rim velocities. Small versions of such flywheels will be capable of very high rotational rates and will likely require the low loss inherent in HTS bearings to achieve these speeds. We present results of experiments with small-diameter rotors that use HTS bearings for levitation and rotate in vacuum at kHz rates. Bearing losses are presented as a function of rotor speed.

M Strasik; J R Hull; J A Mittleider; J F Gonder; P E Johnson; K E McCrary; C R McIver

2010-01-01T23:59:59.000Z

16

Research on simulation of ship electric propulsion system with flywheel energy storage system  

Science Journals Connector (OSTI)

Flywheel energy storage has been widely used to ... electric power quality. This paper designed a flywheel energy storage device to improve ship electric propulsion system power grid quality. The practical mathem...

Chunling Xie; Conghui Zhang; Jen-Yuan James Chang

2011-06-01T23:59:59.000Z

17

The Application of Flywheels in Short-term Energy Storage  

Science Journals Connector (OSTI)

ABSTRACT In many alternative energy systems there is a requirement for energy storage over periods of up to 20 seconds in order to match supply and demand at times when these are changing rapidly and independently. The flywheel forms an ideal basis for such storage because of its relatively high cycle life and potential power and energy density. Wind energy conversion is taken as an example and the requirement for energy storage in WTG systems is assessed. Flywheel energy storage is compared with other forms of storage and is shown to be potentially suitable for this requirement. Power transmission between the flywheel and the WTG grid system requires a variable speed regenerative drive and associated frequency conversion. Such a scheme might permit variable speed WTG operation. A DC link converter is described.

C.M. Jefferson; N. Larsen

1984-01-01T23:59:59.000Z

18

Experimental Evaluation of a High Speed Flywheel for an Energy Cache System  

Science Journals Connector (OSTI)

A flywheel energy cache system (FECS) is a mechanical battery that can charge/discharge electricity by converting it into the kinetic energy of a rotating flywheel, and vice versa. Compared to a chemical battery, a FECS has great advantages in durability and lifetime, especially in hot or cold environments. Design simulations of the FECS were carried out to clarify the effects of the composition and dimensions of the flywheel rotor on the charge/discharge performance. The rotation speed of a flywheel is limited by the strength of the materials from which it is constructed. Three materials, carbon fiber-reinforced polymer (CFRP), Cr-Mo steel, and a Mg alloy were examined with respect to the required weight and rotation speed for a 3 MJ (0.8 kWh) charging/discharging energy, which is suitable for an FECS operating with a 3–5 kW photovoltaic device in an ordinary home connected to a smart grid. The results demonstrate that, for a stationary 3 MJ FECS, Cr-Mo steel was the most cost-effective, but also the heaviest, Mg-alloy had a good balance of rotation speed and weight, which should result in reduced mechanical loss and enhanced durability and lifetime of the system, and CFRP should be used for applications requiring compactness and a higher energy density. Finally, a high-speed prototype FW was analyzed to evaluate its fundamental characteristics both under acceleration and in the steady state.

J Haruna; K Murai; J Itoh; N Yamada; Y Hirano; T Fujimori; T Homma

2011-01-01T23:59:59.000Z

19

11 - Flywheel energy storage technologies for wind energy systems  

Science Journals Connector (OSTI)

Abstract: This chapter provides an overview of flywheel storage technology. The rotor design and construction, the power interface using flywheels, and the features and key advantages are discussed. The status of flywheel technology is described, including a description of commercial products, specifications, and capital and running costs. Research and development needs and actions are considered. Applications of flywheels requiring continuous cycling at high power are discussed, including the application to smoothing wind power fluctuations in autonomous power systems and weak grid networks. Finally, sources of further information and references to technical papers and reports are listed, for the reader wishing to investigate further.

A.J. Ruddell

2010-01-01T23:59:59.000Z

20

Control based on fuzzy logic of a flywheel energy storage system associated with wind and diesel generators  

Science Journals Connector (OSTI)

The aim of this paper is to propose a control strategy of a flywheel energy storage system associated with a diesel generator and a fixed speed wind generator. To control the power exchanged between the flywheel energy storage system and the ac grid, ... Keywords: diesel generator, flywheel energy storage system, fuzzy logic based supervisor, wind generator

Ludovic Leclercq; Benoit Robyns; Jean-Michel Grave

2003-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Energy management of flywheel-based energy storage device for wind power smoothing  

Science Journals Connector (OSTI)

Abstract Power fluctuations of wind generators may affect power quality especially in weak or isolated grids. This paper proposes an energy management strategy for a flywheel-based energy storage device. The aim of the flywheel is to smooth the net power flow injected to the grid by a variable speed wind turbine. The design of the energy management strategy is conducted through several phases. First, a definition and determination of the optimal operation of the storage device is carried out through the formulation and deterministic solution of an optimization problem in GAMS. Based on this solution, an online energy management algorithm is proposed to achieve a close to optimal operation of the flywheel. This algorithm determines the set points of the torque control of the flywheel electrical machine. The proposed methodology is illustrated by simulations.

Francisco Díaz-González; Andreas Sumper; Oriol Gomis-Bellmunt; Fernando D. Bianchi

2013-01-01T23:59:59.000Z

22

Design methodologies for advanced flywheel energy storage.  

E-Print Network (OSTI)

??Higher penetration of volatile renewable sources and increasing load demand are putting a strain on the current utility grid structure. Energy storage solutions are required… (more)

Hearn, Clay Stephen

2014-01-01T23:59:59.000Z

23

Energy storage in composite flywheel rotors.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: As the push continues for increased use of renewables on the electricity grid, the problem of energy storage is becoming more urgent than… (more)

Janse van Rensburg, Petrus J.

2011-01-01T23:59:59.000Z

24

DFIG-based fuzzy sliding-mode control of WECS with a flywheel energy storage  

Science Journals Connector (OSTI)

In this paper the so-called sliding-mode control (SMC) technique used with fuzzy control is applied to control a variable speed wind energy conversion system (WECS) with a doubly fed induction generator (DFIG). The paper also points out interesting performances of the double-fed induction machine (DFIM) used as a flywheel energy storage system (FESS). In fact, adjusting the rotor speed can allow the induction machine to release kinetic energy to the power system or to absorb this energy from the utility grid. The DFIM enables decoupled control of system active and reactive powers in both steady and transient states. The effectiveness of the proposed DFIG-based WECS control approach along with FESS is demonstrated with computer simulation results

D. Kairous; R. Wamkeue

2012-01-01T23:59:59.000Z

25

Testing and evaluation of a solar photovoltaic flywheel energy storage system  

SciTech Connect

A thorough series of experimental measurements are reported that have been made on a 1/10-scale, magnetically levitated, residential solar photovoltaic (PV) flywheel energy storage system which acts as a complete interface between a solar PV array and an ac load. The overall in-out electrical storage efficiency of the flywheel unit was measured along with the power-transfer efficiencies of individual components and the system spin-down tare losses. An overall storage efficiency of 82% was measured for the flywheel storage system when operated in a utility-interactive mode.

Jarvinen, P. O.; Brench, B. L.; Hay, R. D.; Rasmussen, N. E.

1981-01-01T23:59:59.000Z

26

THE WIDE-AREA ENERGY STORAGE AND MANAGEMENT SYSTEM PHASE II Final Report - Flywheel Field Tests  

SciTech Connect

This research was conducted by Pacific Northwest National Laboratory (PNNL) operated for the U.S. department of Energy (DOE) by Battelle Memorial Institute for Bonneville Power Administration (BPA), California Institute for Energy and Environment (CIEE) and California Energy Commission (CEC). A wide-area energy management system (WAEMS) is a centralized control system that operates energy storage devices (ESDs) located in different places to provide energy and ancillary services that can be shared among balancing authorities (BAs). The goal of this research is to conduct flywheel field tests, investigate the technical characteristics and economics of combined hydro-flywheel regulation services that can be shared between Bonneville Power Administration (BPA) and California Independent System Operator (CAISO) controlled areas. This report is the second interim technical report for Phase II of the WAEMS project. This report presents: 1) the methodology of sharing regulation service between balancing authorities, 2) the algorithm to allocate the regulation signal between the flywheel and hydro power plant to minimize the wear-and-tear of the hydro power plants, 3) field results of the hydro-flywheel regulation service (conducted by the Beacon Power), and 4) the performance metrics and economic analysis of the combined hydro-flywheel regulation service.

Lu, Ning; Makarov, Yuri V.; Weimar, Mark R.; Rudolph, Frank; Murthy, Shashikala; Arseneaux, Jim; Loutan, Clyde; Chowdhury, S.

2010-08-31T23:59:59.000Z

27

ESS 2012 Peer Review - Magnetic Composites for Flywheel Energy Storage - Jim Martin, SNL  

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

subsidiary subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. Photos placed in horizontal position with even amount of white space between photos and header Photos placed in horizontal position with even amount of white space between photos and header Magnetic composites for flywheel energy storage September 27, 2012 James E. Martin Project description  The bearings currently used in energy storage flywheels dissipate a significant amount of energy. Magnetic bearings would reduce these losses appreciably.  Magnetic bearings require magnetic materials on an inner annulus of the flywheel for magnetic levitation.  This magnetic material must be able to withstand a 2% tensile deformation, yet

28

Wind Power Control System Associated to the Flywheel Energy Storage System Connected to the Grid  

Science Journals Connector (OSTI)

Abstract The aim of this work is the study of the integration of the flywheel energy storage systems in the wind generators at variable speed based to the doubly fed induction generator (DFIG) and to help these generators to contribute to the ancillary services. In this paper investigates also, the control method of the flywheel energy storage system (FESS) with a classical squirrel-cage induction machine associated to a variable speed wind generation using cascade rectifier filter inverter. Simulation results of the dynamic models of the wind generator are presented, for different operating points, to show the good performance of the proposed system.

S. Taraft; D. Rekioua; D. Aouzellag

2013-01-01T23:59:59.000Z

29

Competition between SMES and flywheels  

SciTech Connect

The benefits of flywheel energy storage using high-temperature superconducting bearings is compared to that of SMES for the same applications. Flywheels cover the same range of energy storage times as SMES but their scaling relationships make them inherently more amenable to modular manufacture. In addition, the magnetic fields seen by the environment are considerably reduced for flywheels.

Hull, J.R.

1995-02-01T23:59:59.000Z

30

PCIM, Nrnberg, may 2003 FLYWHEEL ENERGY STORAGE SYSTEMS IN HYBRID AND  

E-Print Network (OSTI)

-scale storage of the type pumped hydro, compressed air, flow batteries, etc.), or even at the level of potentialPCIM, Nürnberg, may 2003 FLYWHEEL ENERGY STORAGE SYSTEMS IN HYBRID AND DISTRIBUTED ELECTRICITY of the electromechanical storage of energy over long operating cycles (with time constants ranging from several minutes

Boyer, Edmond

31

Simulation and analysis of high-speed modular flywheel energy storage systems using MATLAB/Simulink  

Science Journals Connector (OSTI)

Storage is an extremely important area of research and has several applications, including potential of furthering the integration of renewable in the grid. An efficient and cost-effective electric storage is a transformative technology and benefits ... Keywords: PM motor, flywheel energy storage system, high-speed drives, storage system

Parag Upadhyay; Ned Mohan

2009-07-01T23:59:59.000Z

32

Lightweight flywheel containment  

DOE Patents (OSTI)

A lightweight flywheel containment composed of a combination of layers of various material which absorb the energy of a flywheel structural failure. The various layers of material act as a vacuum barrier, momentum spreader, energy absorber, and reaction plate. The flywheel containment structure has been experimentally demonstrated to contain carbon fiber fragments with a velocity of 1,000 m/s and has an aerial density of less than 6.5 g/square centimeters. The flywheel containment, may for example, be composed of an inner high toughness structural layer, and energy absorbing layer, and an outer support layer. Optionally, a layer of impedance matching material may be utilized intermediate the flywheel rotor and the inner high toughness layer.

Smith, James R. (Livermore, CA)

2001-01-01T23:59:59.000Z

33

Control based on fuzzy logic of a flywheel energy storage system associated with wind and diesel generators  

Science Journals Connector (OSTI)

The aim of this paper is to propose a control strategy of a flywheel energy storage system associated with a diesel generator and a fixed speed wind generator. To control the power exchanged between the flywheel energy storage system and the ac grid, a fuzzy logic based supervisor is proposed with the aim to minimize variations of the power generated by the diesel generator. The interesting performance of the proposed supervisor is shown with the help of simulations.

Ludovic Leclercq; Benoit Robyns; Jean-Michel Grave

2003-01-01T23:59:59.000Z

34

Control and simulation of a flywheel energy storage for a wind diesel power system  

Science Journals Connector (OSTI)

Abstract Wind diesel power systems (WDPSs) are isolated microgrids which combine wind diesel generators with wind turbine generators. If the WDPS includes a short-term energy storage system (ESS) both the logistic and the dynamic operation are improved. Flywheel based energy storage systems (FESSs) have characteristics that make them very appropriate to be used as short-term ESS in WDPS, so that a FESS, is added to the WDPS. The FESS main components: electrical machine, flywheel, grid converter and electrical machine converter are described. As the main aim of the FESS in the present article is power quality improvement, a robust low cost low-speed FESS (LS-FESS) is selected. The LS-FESS which includes an asynchronous machine (ASM) and a steel flywheel is sized for a particular WDPS. The FESS power converters and ASM can be controlled as if they were a servo but, in order to attain more robustness, it is better to control the ASM converter to maintain a constant DC-voltage in the DC-link and to control the grid converter to exchange the necessary power references with the isolated grid. Finally, in order to verify the proposed low speed FESS, it is simulated along with the WDPS. Simulation results with graphs for the isolated power system frequency and voltage, active powers generated/consumed by the WDPS elements, the FESS-ASM direct and quadrature currents and FESS-flywheel speed are presented for load and wind speed steps. The simulations show a power quality improvement of the isolated microgrid due to the use of the FESS.

R. Sebastián; R. Peña-Alzola

2015-01-01T23:59:59.000Z

35

Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly  

E-Print Network (OSTI)

, and environmental disposal. Extreme and harsh downhole conditions necessitate that the flywheel module withstands temperatures and pressures exceeding 300 ?F and 20 kpsi, respectively, as well as violent vibrations encountered during drilling. Moreover, the flywheel...

Saeed, Ahmed

2012-07-16T23:59:59.000Z

36

Performance testing and economic analysis of a photovoltaic flywheel energy storage and conversion system  

SciTech Connect

A subscale prototype of a flywheel energy storage and conversion system for use with photovoltaic power systems of residential and intermediate load-center size has been designed, built and tested by MIT Lincoln Laboratory. System design, including details of such key components as magnetic bearings, motor generator, and power conditioning electronics, is described. Performance results of prototype testing are given and indicate that this system is the equal of or superior to battery-inverter systems for the same application. Results of cost and user-worth analysis show that residential systems are economically feasible in stand-alone and in some utility-interactive applications.

Hay, R.D.; Millner, A.R.; Jarvinen, P.O.

1980-01-01T23:59:59.000Z

37

Third Generation Flywheels for electric storage  

SciTech Connect

Electricity is critical to our economy, but growth in demand has saturated the power grid causing instability and blackouts. The economic penalty due to lost productivity in the US exceeds $100 billion per year. Opposition to new transmission lines and power plants, environmental restrictions, and an expected $100 billion grid upgrade cost have slowed system improvements. Flywheel electricity storage could provide a more economical, environmentally benign alternative and slash economic losses if units could be scaled up in a cost effective manner to much larger power and capacity than the present maximum of a few hundred kW and a few kWh per flywheel. The goal of this project is to design, construct, and demonstrate a small-scale third generation electricity storage flywheel using a revolutionary architecture scalable to megawatt-hours per unit. First generation flywheels are built from bulk materials such as steel and provide inertia to smooth the motion of mechanical devices such as engines. They can be scaled up to tens of tons or more, but have relatively low energy storage density. Second generation flywheels use similar designs but are fabricated with composite materials such as carbon fiber and epoxy. They are capable of much higher energy storage density but cannot economically be built larger than a few kWh of storage capacity due to structural and stability limitations. LaunchPoint is developing a third generation flywheel — the "Power Ring" — with energy densities as high or higher than second generation flywheels and a totally new architecture scalable to enormous sizes. Electricity storage capacities exceeding 5 megawatt-hours per unit appear both technically feasible and economically attractive. Our design uses a new class of magnetic bearing – a radial gap “shear-force levitator” – that we discovered and patented, and a thin-walled composite hoop rotated at high speed to store kinetic energy. One immediate application is power grid frequency regulation, where Power Rings could cut costs, reduce fuel consumption, eliminate emissions, and reduce the need for new power plants. Other applications include hybrid diesel-electric locomotives, grid power quality, support for renewable energy, spinning reserve, energy management, and facility deferral. Decreased need for new generation and transmission alone could save the nation $2.5 billion per year. Improved grid reliability could cut economic losses due to poor power quality by tens of billions of dollars per year. A large export market for this technology could also develop. Power Ring technology will directly support the EERE mission, and the goals of the Distributed Energy Technologies Subprogram in particular, by helping to reduce blackouts, brownouts, electricity costs, and emissions, by relieving transmission bottlenecks, and by greatly improving grid power quality.

Ricci, Michael, R.; Fiske, O. James

2008-02-29T23:59:59.000Z

38

Simulations of economical and technical feasibility of battery and flywheel hybrid energy storage systems in autonomous projects  

Science Journals Connector (OSTI)

This paper deals with the feasibility of a Renewable Energy Sources (RES)-based stand-alone system for electricity supply based on a Flywheel Energy Storage System (FESS) located on the Greek Island of Naxos. The innovative use of flywheels in parallel connection with electrochemical batteries, as an integrated storage device in the same power plant, was selected to be simulated as it is a necessary buffer covering the load of a typical house. The optimal configuration for the electromechanical connection between the electrochemical batteries and flywheels is also considered in this study. Operational characteristics of the new storage systems were estimated and used in the simulations, while the financial aspects of the projects finalized using hand-made calculations and the HOMER software was used only for the energy calculations. It was found that an off-grid project using advanced and totally “green” technologies is possible and comparable to more conventional RES-based systems, in terms of energy and economical feasibility. Finally, it can be concluded that systems with low price flywheels are equivalent to those with electrochemical batteries.

George N. Prodromidis; Frank A. Coutelieris

2012-01-01T23:59:59.000Z

39

GSFC flywheel status  

SciTech Connect

The assessment of flywheel energy storage for spacecraft power system is based on the conceptual flywheel design. This conceptual design of an integrated flywheel is based on the Mechanical Capacitor which evolved from development of magnetic bearings and permanent magnet ironless-brushless DC motors. The mechanical capacitor is based on three key technologies: (1) a composite rotor with a low ID to OD ratio for high energy density (weight and volume) (2) magnetic suspension close to the geometric center of the rotating mass to minimize loads normally encountered on the ends of a shaft, a no-wear mechanism in a vacuum environment, and to minimize losses at high rotational speeds (3) permanent magnet ironless-brushless DC motor/generator for high efficiency of conversion and low losses at high rotational speeds. The complete system would include the necessary electronics for the motor/generator, containment, and counterrotating wheels for attitude control compatibility.

Rodriguez, G.E.

1983-12-01T23:59:59.000Z

40

Wind diesel design and the role of short term flywheel energy storage  

Science Journals Connector (OSTI)

Wind diesel hybrid systems can often provide a cost effective solution to electricity supply in many rural and grid remote applications. The potential market for such stand alone systems is vast. The sizing and design of these systems to suite a given application is non-trivial. Design principles for wind diesel systems are presented with stress placed on the role of short term energy storage. It is shown that flywheels are the most appropriate form of energy storage. A user-friendly software package to help engineers design wind diesel systems has been developed over the last three years with support from the CEC's JOULE programme. The modelling and software development was undertaken cooperatively by several EEC and EFTA countries. An brief introduction to the software, which models both logistic and dynamic aspects of system operation, is provided and there is a discussion of its validation.

D.G. Infield

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Control of wind generator associated to a flywheel energy storage system  

Science Journals Connector (OSTI)

In this paper, a doubly fed variable speed wind induction generator connected to the grid associated to a flywheel energy storage system (FESS) is investigated. The dynamic behaviour of a wind generator, including the models of the wind turbine (aerodynamic), the doubly fed induction generator (DFIG), a ac/ac direct converter, the converter control (algorithm of VENTURINI) and the power control of this system, is studied. Also investigated is a control method of the FESS system, which consists of the classical squirrel-cage induction machine supplied off the variable speed wind generator (VSWG) through a rectifier–inverter cascade arrangement. Simulation results obtained on the basis of the dynamic models of the wind generator are presented, for different operating points, to demonstrate the performance of the proposed system.

K. Ghedamsi; D. Aouzellag; E.M. Berkouk

2008-01-01T23:59:59.000Z

42

Utilization of rotor kinetic energy storage for hybrid vehicles  

DOE Patents (OSTI)

A power system for a motor vehicle having an internal combustion engine, the power system comprises an electric machine (12) further comprising a first excitation source (47), a permanent magnet rotor (28) and a magnetic coupling rotor (26) spaced from the permanent magnet rotor and at least one second excitation source (43), the magnetic coupling rotor (26) also including a flywheel having an inertial mass to store kinetic energy during an initial acceleration to an operating speed; and wherein the first excitation source is electrically connected to the second excitation source for power cycling such that the flywheel rotor (26) exerts torque on the permanent magnet rotor (28) to assist braking and acceleration of the permanent magnet rotor (28) and consequently, the vehicle. An axial gap machine and a radial gap machine are disclosed and methods of the invention are also disclosed.

Hsu, John S. (Oak Ridge, TN)

2011-05-03T23:59:59.000Z

43

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

44

Dynamical investigation and parameter stability region analysis of a flywheel energy storage system in charging mode  

Science Journals Connector (OSTI)

In this paper, the dynamic behavior analysis of the electromechanical coupling characteristics of a flywheel energy storage system (FESS) with a permanent magnet (PM) brushless direct-current (DC) motor (BLDCM) is studied. The Hopf bifurcation theory and nonlinear methods are used to investigate the generation process and mechanism of the coupled dynamic behavior for the average current controlled FESS in the charging mode. First, the universal nonlinear dynamic model of the FESS based on the BLDCM is derived. Then, for a 0.01 kWh/1.6 kW FESS platform in the Key Laboratory of the Smart Grid at Tianjin University, the phase trajectory of the FESS from a stable state towards chaos is presented using numerical and stroboscopic methods, and all dynamic behaviors of the system in this process are captured. The characteristics of the low-frequency oscillation and the mechanism of the Hopf bifurcation are investigated based on the Routh stability criterion and nonlinear dynamic theory. It is shown that the Hopf bifurcation is directly due to the loss of control over the inductor current, which is caused by the system control parameters exceeding certain ranges. This coupling nonlinear process of the FESS affects the stability of the motor running and the efficiency of energy transfer. In this paper, we investigate into the effects of control parameter change on the stability and the stability regions of these parameters based on the averaged-model approach. Furthermore, the effect of the quantization error in the digital control system is considered to modify the stability regions of the control parameters. Finally, these theoretical results are verified through platform experiments.

Zhang Wei-Ya (???); Li Yong-Li (???); Chang Xiao-Yong (???); Wang Nan (? ?)

2013-01-01T23:59:59.000Z

45

Improved flywheel materials : characterization of nanofiber modified flywheel test specimen.  

SciTech Connect

As alternative energy generating devices (i.e., solar, wind, etc) are added onto the electrical energy grid (AC grid), irregularities in the available electricity due to natural occurrences (i.e., clouds reducing solar input or wind burst increasing wind powered turbines) will be dramatically increased. Due to their almost instantaneous response, modern flywheel-based energy storage devices can act a mechanical mechanism to regulate the AC grid; however, improved spin speeds will be required to meet the necessary energy levels to balance thesegreen' energy variances. Focusing on composite flywheels, we have investigated methods for improving the spin speeds based on materials needs. The so-called composite flywheels are composed of carbon fiber (C-fiber), glass fiber, and aglue' (resin) to hold them together. For this effort, we have focused on the addition of fillers to the resin in order to improve its properties. Based on the high loads required for standard meso-sized fillers, this project investigated the utility of ceramic nanofillers since they can be added at very low load levels due to their high surface area. The impact that TiO2 nanowires had on the final strength of the flywheel material was determined by athree-point-bend' test. The results of the introduction of nanomaterials demonstrated an increase instrength' of the flywheel's C-fiber-resin moiety, with an upper limit of a 30% increase being reported. An analysis of the economic impact concerning the utilization of the nanowires was undertaken and after accounting for new-technology and additional production costs, return on improved-nanocomposite investment was approximated at 4-6% per year over the 20-year expected service life. Further, it was determined based on the 30% improvement in strength, this change may enable a 20-30% reduction in flywheel energy storage cost (%24/kW-h).

Boyle, Timothy J.; Bell, Nelson Simmons; Ehlen, Mark Andrew; Anderson, Benjamin John; Miller, William Kenneth

2013-09-01T23:59:59.000Z

46

Rockwell-Rocketdyne flywheel test results  

SciTech Connect

Results are presented of the spin test evaluation of the Rockwell-Rocketdyne RPE-10 design flywheel at the Oak Ridge Flywheel Evaluation Laboratory. Details of the static evaluation, including measures of weight, inertia, natural frequencies, and radiography, are also presented. The flywheel was subjected to seven spin cycles with a maximum of 383 rps, 105% of design speed. At that speed, the energy stored was 1.94 kWhr at 36.1 Whr/kg. The maximum speed was limited by the inability of the test facility to accommodate the increasing eccentric shift of both hub disks with increasing speed. No material degradation was observed during the testing.

Steele, R.S. Jr.; Babelay, E.F. Jr.; Sutton, B.J.

1981-01-01T23:59:59.000Z

47

Superconductor bearings, flywheels and transportation  

Science Journals Connector (OSTI)

This paper describes the present status of high temperature superconductors (HTS) and of bulk superconducting magnet devices, their use in bearings, in flywheel energy storage systems (FESS) and linear transport magnetic levitation (Maglev) systems. We report and review the concepts of multi-seeded REBCO bulk superconductor fabrication. The multi-grain bulks increase the averaged trapped magnetic flux density up to 40% compared to single-grain assembly in large-scale applications. HTS magnetic bearings with permanent magnet (PM) excitation were studied and scaled up to maximum forces of 10 kN axially and 4.5 kN radially. We examine the technology of the high-gradient magnetic bearing concept and verify it experimentally. A large HTS bearing is tested for stabilizing a 600 kg rotor of a 5 kWh/250 kW flywheel system. The flywheel rotor tests show the requirement for additional damping. Our compact flywheel system is compared with similar HTS–FESS projects. A small-scale compact YBCO bearing with in situ Stirling cryocooler is constructed and investigated for mobile applications. Next we show a successfully developed modular linear Maglev system for magnetic train operation. Each module levitates 0.25t at 10 mm distance during one-day operation without refilling LN2. More than 30 vacuum cryostats containing multi-seeded YBCO blocks are fabricated and are tested now in Germany, China and Brazil.

F N Werfel; U Floegel-Delor; R Rothfeld; T Riedel; B Goebel; D Wippich; P Schirrmeister

2012-01-01T23:59:59.000Z

48

Reactor coolant pump flywheel  

DOE Patents (OSTI)

A flywheel for a pump, and in particular a flywheel having a number of high density segments for use in a nuclear reactor coolant pump. The flywheel includes an inner member and an outer member. A number of high density segments are provided between the inner and outer members. The high density segments may be formed from a tungsten based alloy. A preselected gap is provided between each of the number of high density segments. The gap accommodates thermal expansion of each of the number of segments and resists the hoop stress effect/keystoning of the segments.

Finegan, John Raymond; Kreke, Francis Joseph; Casamassa, John Joseph

2013-11-26T23:59:59.000Z

49

LIRR High-Speed Flywheel Demonstration  

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

LIRR High-Speed Flywheel LIRR High-Speed Flywheel Demonstration Guy Sliker Program Manager Research & Technology Development New York Power Authority This project is part of the Joint Energy Storage Initiative between the New York State Energy Research and Development Authority (NYSERDA) and the Energy Storage Systems Program of the U.S. Department of Energy (DOE/ESS), and managed by Sandia National Laboratories (SNL). Presentation Layout Introduction Flywheel Description Project Reasoning Project Objective Project Participants Expected Benefits New York Power Authority Highlights A public benefit energy corporation founded 1931 Largest non-federal public electric utility in United States Wholesale power supplier throughout New York State and neighboring states as required by law

50

Low-cost flywheel demonstration program. Final report  

SciTech Connect

The Applied Physics Laboratory/Department of Energy Low Cost Flywheel Demonstration Program was initiated on 1 October 1977 and was successfully concluded on 31 December 19'9. The total cost of this program was $355,190. All primary objectives were successfully achieved as follows: demonstration of a full-size, 1)kWh flywheel having an estimated cost in large-volume production of approximately $50/kWh; developmeNt of a ball-bearing system having losses comparable to the losses in a totally magnetic suspension system; successful and repeated demonstration of the low-cost flywheel in a complete flywheel energy-storage system based on the use of ordinary house voltage and frequency; and application of the experience gained in the hardware program to project the system design into a complete, full-scale, 30-kWh home-type flywheel energy-storage system.

None

1980-04-01T23:59:59.000Z

51

Peak Power Bi-directional Transfer From High Speed Flywheel to Electrical Regulated Bus Voltage System  

E-Print Network (OSTI)

were performed to determine the energy transfer capabilities of a flywheel coupled high speed permanent magnet synchronous machine through the proposed system's energy storage tank. Results are presented

Szabados, Barna

52

Separators for flywheel rotors  

DOE Patents (OSTI)

A separator forms a connection between the rotors of a concentric rotor assembly. This separator allows for the relatively free expansion of outer rotors away from inner rotors while providing a connection between the rotors that is strong enough to prevent disassembly. The rotor assembly includes at least two rotors referred to as inner and outer flywheel rings or rotors. This combination of inner flywheel ring, separator, and outer flywheel ring may be nested to include an arbitrary number of concentric rings. The separator may be a segmented or continuous ring that abuts the ends of the inner rotor and the inner bore of the outer rotor. It is supported against centrifugal loads by the outer rotor and is affixed to the outer rotor. The separator is allowed to slide with respect to the inner rotor. It is made of a material that has a modulus of elasticity that is lower than that of the rotors. 10 figs.

Bender, D.A.; Kuklo, T.C.

1998-07-07T23:59:59.000Z

53

Separators for flywheel rotors  

DOE Patents (OSTI)

A separator forms a connection between the rotors of a concentric rotor assembly. This separator allows for the relatively free expansion of outer rotors away from inner rotors while providing a connection between the rotors that is strong enough to prevent disassembly. The rotor assembly includes at least two rotors referred to as inner and outer flywheel rings or rotors. This combination of inner flywheel ring, separator, and outer flywheel ring may be nested to include an arbitrary number of concentric rings. The separator may be a segmented or continuous ring that abuts the ends of the inner rotor and the inner bore of the outer rotor. It is supported against centrifugal loads by the outer rotor and is affixed to the outer rotor. The separator is allowed to slide with respect to the inner rotor. It is made of a material that has a modulus of elasticity that is lower than that of the rotors.

Bender, Donald A. (Dublin, CA); Kuklo, Thomas C. (Oakdale, CA)

1998-01-01T23:59:59.000Z

54

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

55

System design, test results, and economic analysis of a flywheel energy storage and conversion system for photovoltaic applications  

SciTech Connect

MIT Lincoln Laboratory is developing a flywheel interface and storage system for use with photovoltaic power sources. Test data on the performance of components built to investigate the feasibility of such a system, and the results of economic studies of the system showing user-worth analysis and manufacturing-cost estimates, are presented. The system has magnetic bearings, a maximum-power-point tracker, DC input, and cycloconverter output from an ironless-armature motor-generator.

Millner, A.R.; Dinwoodie, T.

1980-01-01T23:59:59.000Z

56

A fuzzy logic supervisor for active and reactive power control of a variable speed wind energy conversion system associated to a flywheel storage system  

Science Journals Connector (OSTI)

In this paper, we propose a Wind Energy Conversion System (WECS) at variable speed using a Doubly Fed Induction Generator (DFIG) controlled on the rotor side through converters. A Flywheel Energy Storage System (FESS) is connected to the studied wind generator at the DC bus in order to evaluate its capacity to participate to the ancillary services. We study the improvement of the active and reactive power quality produced by the wind generator and its effect on the load voltage regulation connected to the wind generator. For that, a fuzzy logic supervisor is established to control the FESS operation and the DC bus voltage in order to smooth the active power fluctuations due to the random wind speed variations. A control law is also described to smooth the reactive power at the connection node to the grid.

Lilia Jerbi; Lotfi Krichen; Abderrazak Ouali

2009-01-01T23:59:59.000Z

57

Flywheel energy storage.  

E-Print Network (OSTI)

?? This master thesis was provided by ABB Cooperate Research in Va?stera?s. This study has two major purposes: (1) to identify the characteristics of a… (more)

Östergård, Rickard

2011-01-01T23:59:59.000Z

58

Low-cost flywheel demonstration program. Final report, 1 October 1977-31 December 1979  

SciTech Connect

The Applied Physics Laboratory/Department of Energy Low Cost Flywheel Demonstration Program was initiated on 1 October 1977 and was successfully concluded on 31 December 1979. The total cost of this program was $355,190. All primary objectives were successfully achieved as follows: demonstration of a full-size, 1-kWh flywheel having an estimated cost in large-volume production of approximately $50/kWh; development of a ball-bearing system having losses comparable to the losses in a totally magnetic suspension system; successful and repeated demonstration of the low-cost flywheel in a complete flywheel energy-storage system based on the use of ordinary house voltage and frequency; and application of the experience gained in the hardware program to project the system design into a complete, full-scale, 30-kWh home-type flywheel energy-storage system.

Rabenhorst, D.W.; Small, T.R.; Wilkinson, W.O.

1980-04-01T23:59:59.000Z

59

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

60

Design & development fo a 20-MW flywheel-based frequency regulation power plant : a study for the DOE Energy Storage Systems program.  

SciTech Connect

This report describes the successful efforts of Beacon Power to design and develop a 20-MW frequency regulation power plant based solely on flywheels. Beacon's Smart Matrix (Flywheel) Systems regulation power plant, unlike coal or natural gas generators, will not burn fossil fuel or directly produce particulates or other air emissions and will have the ability to ramp up or down in a matter of seconds. The report describes how data from the scaled Beacon system, deployed in California and New York, proved that the flywheel-based systems provided faster responding regulation services in terms of cost-performance and environmental impact. Included in the report is a description of Beacon's design package for a generic, multi-MW flywheel-based regulation power plant that allows accurate bids from a design/build contractor and Beacon's recommendations for site requirements that would ensure the fastest possible construction. The paper concludes with a statement about Beacon's plans for a lower cost, modular-style substation based on the 20-MW design.

Rounds, Robert (Beacon Power, Tyngsboro, MA); Peek, Georgianne Huff

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

MEANKINETIC ENERGY,EDDY ENERGY,AND KINETIC ENERGYEXCHANGEBETWEENFLUCTUATIONSAND MEAN  

E-Print Network (OSTI)

MEANKINETIC ENERGY,EDDY ENERGY,AND KINETIC ENERGYEXCHANGEBETWEENFLUCTUATIONSAND MEAN FLOWWITHIN by cornputing three quantities suggested by the theory of turbulence: the nean kinetic energy, the eddy energy, and the energy exchange between the nean and fluctuating portions of the flow field (ca11ed dE/dt). Contours

Luther, Douglas S.

62

Kinetic Energy Systems | Open Energy Information  

Open Energy Info (EERE)

Systems Systems Jump to: navigation, search Name Kinetic Energy Systems Place Ocala, Florida Zip 34476 Sector Hydro Product Designs and develops tidal generators. Has notably patented the KESC Tidal Generator which is based on free flow hydrodynamics. Coordinates 29.187525°, -82.140394° 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":29.187525,"lon":-82.140394,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

63

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

64

Canned pump having a high inertia flywheel  

DOE Patents (OSTI)

A canned pump is described which includes a motor, impeller, shaft, and high inertia flywheel mounted within a hermetically sealed casing. The flywheel comprises a heavy metal disk made preferably of a uranium alloy with a stainless steel shell sealably enclosing the heavy metal. The outside surfaces of the stainless steel comprise thrust runners and a journal for mating with, respectively, thrust bearing shoes and radial bearing segments. The bearings prevent vibration of the pump and, simultaneously, minimize power losses normally associated with the flywheel resulting from frictionally pumping surrounding fluid. 5 figs.

Veronesi, L.; Raimondi, A.A.

1989-12-12T23:59:59.000Z

65

ESS 2012 Peer Review - Next Generation Composite Materials for Flywheel Development - Timothy Lambert, SNL  

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

Sandia! Sandia! National! Laboratories! Acknowledgments We gratefully acknowledge support from Dr. Imre Gyuk and the Office of Electricity, Delivery and Energy Reliability. Sandia is a multi-program laboratory operated by Sandia Corporation, a Lockheed-Martin Company, for the United States Department of Energy s National Nuclear Security Administration under contract DE-AC04-94AL85000. Abstract Flywheels are "mechanical battery" storage systems that have fast response times, long lifetimes and lower maintenance costs; when coupled with high-temperature superconducting (HTS) bearings, flywheels can exhibit extremely low rotational losses resulting in high efficiency. For energy storage purposes, materials with higher strengths, and lower densities that would allow the flywheel to spin

66

Design and testing of the HTS bearing for a 10 kWh flywheel system  

Science Journals Connector (OSTI)

Flywheels are of interest for a wide range of energy storage applications, from support of renewable resources to distributed power applications and uninterruptible power systems (UPS) (Day et al 2000 Proc. EESAT 2000 (Orlando, FL, Sept. 2000)). The use of high-temperature superconducting (HTS) bearings for such systems has significant advantages for applications requiring large amounts of energy to be stored with low parasitic losses and with minimal system maintenance. As flywheel systems increase in size, it becomes a significant challenge to provide adequate stiffness in these bearings without exceeding the strength limits of rotating magnet assemblies. The Boeing Company is designing and building a prototype flywheel of 10 kWh total stored energy and has focused much effort on the HTS bearing system. This paper will describe the general structure of the bearing and the steps taken to optimize its magnetic and structural performance and show recent test results.

A C Day; M Strasik; K E McCrary; P E Johnson; J W Gabrys; J R Schindler; R A Hawkins; D L Carlson; M D Higgins; J R Hull

2002-01-01T23:59:59.000Z

67

Extraction of Equilibrium Energy and Kinetic Parameters from...  

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

Investigator for the Extraction of Equilibrium Energy and Kinetic Parameters from Single Molecule Force Spectroscopy Data. LLNL BES Programs Highlight Extraction of...

68

Residential photovoltaic flywheel storage system performance and cost  

SciTech Connect

A subscale prototype of a flywheel energy storage and conversion system for use with photovoltaic power systems of residential and intermediate load-center size has been designed, built and tested by MIT Lincoln Laboratory. System design, including details of such key components as magnetic bearings, motor generator, and power-conditioning electronics, are described. Performance results of prototype testing are given and indicate that this system is the equal of or superior to battery and inverter systems for the same application. Results of cost and user-worth analysis show that residential systems are economically feasible in stand-alone and in utility-interactive applications.

Hay, R.D.; Millner, A.R.; Jarvinen, P.O.

1980-01-01T23:59:59.000Z

69

Negative kinetic energy term of general relativity and its removing  

E-Print Network (OSTI)

We first present a new Lagrangian of general relativity, which can be divided into kinetic energy term and potential energy term. Taking advantage of vierbein formalism, we reduce the kinetic energy term to a sum of five positive terms and one negative term. Some gauge conditions removing the negative kinetic energy term are discussed. Finally, we present a Lagrangian that only include positive kinetic energy terms. To remove the negative kinetic energy term leads to a new field equation of general relativity in which there are at least five equations of constraint and at most five dynamical equations, this characteristic is different from the normal Einstein field equation in which there are four equations of constraint and six dynamical equations.

T. Mei

2009-03-30T23:59:59.000Z

70

MHK Projects/Ogdensburg Kinetic Energy Project | Open Energy Information  

Open Energy Info (EERE)

Ogdensburg Kinetic Energy Project Ogdensburg Kinetic Energy Project < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":44.6942,"lon":-75.4863,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

71

An action with positive kinetic energy term for general relativity  

E-Print Network (OSTI)

At first, we state some results in arXiv: 0707.2639, and then, using a positive kinetic energy coordinate condition given by arXiv: 0707.2639, we present an action with positive kinetic energy term for general relativity. Based on this action, the corresponding theory of canonical quantization is discussed.

T. Mei

2007-11-02T23:59:59.000Z

72

Energy landscapes, folding mechanisms and kinetics of RNA tetraloop hairpins  

Science Journals Connector (OSTI)

Energy landscapes, folding mechanisms and kinetics of RNA tetraloop hairpins ... In this work, we use the discrete path sampling (DPS) approach to explore the energy landscapes of two RNA tetraloop hairpins, and provide insights into their folding mechanisms and kinetics in atomistic detail. ... Our results show that the potential energy landscapes have a distinct funnel-like bias towards the folded hairpin state, consistent with efficient structure-seeking properties. ...

Debayan Chakraborty; Rosana Collepardo-Guevara; David J. Wales

2014-12-02T23:59:59.000Z

73

Kinetic energy error in the NIMROD spheromak simulations Carl Sovinec  

E-Print Network (OSTI)

Kinetic energy error in the NIMROD spheromak simulations Carl Sovinec 10/25/00 Dmitri Ryutov at the ends (as in the spheromak simulations), it may lead to compression in a boundary layer.] The maximum

Sovinec, Carl

74

Turbulent kinetic energy balance as a tool for estimating vertical ...  

Science Journals Connector (OSTI)

Based on microstructure measurements in a simply shaped lake basin, the sources of ... Comparison with turbulent kinetic energy balances, performed in five other lakes, ...... pation (PB) is everywhere the same per unit area of sediment

1910-00-90T23:59:59.000Z

75

Kinetic Energy Principle And Neoclassical Toroidal Torque In Tokamaks  

SciTech Connect

It is shown that when tokamaks are perturbed the kinetic energy principle is closely related to the neoclassical toroidal torque by the action invariance of particles. Especially when tokamaks are perturbed from scalar pressure equilibria, the imaginary part of the potential energy in the kinetic energy principle is equivalent to the toroidal torque by the Neoclassical Toroidal Viscosity (NTV). A unified description therefore should be made for both physics. It is also shown in this case that the potential energy operator can be self-adjoint and thus the stability calculation can be simplified by minimizing the potential energy

Jong-Kyu Park

2011-11-07T23:59:59.000Z

76

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":""}]}

77

Batteries, Fuel Cells, and Flywheels  

Science Journals Connector (OSTI)

Cars and trucks are responsible for using almost 30 percent of the fossil fuel energy consumed in the United States. Almost all of this energy comes from petroleum products. When gasoline and diesel oil is bur...

Sidney Borowitz

1999-01-01T23:59:59.000Z

78

ORBITAL-FREE KINETIC-ENERGY DENSITY FUNCTIONAL THEORY  

E-Print Network (OSTI)

Chapter 5 ORBITAL-FREE KINETIC-ENERGY DENSITY FUNCTIONAL THEORY Yan Alexander Wang and Emily A Theory (DFT), there was the Thomas-Fermi (TF) model, which uses the electron density ¢¡ r£ (a function-dependent DFT Density-Functional Theory DI density-independent DM1 first-order reduced density matrix EDF energy

Wang, Yan Alexander

79

Energy Storage (II): Developing Advanced Technologies  

Science Journals Connector (OSTI)

...LOS AL SCIE ( 1973 ). POST, R.F., FLYWHEELS, SCIENTIFIC AMERICAN 229 : 17 ( 1973...proposal to store energy in rapidly rotating flywheels is eliciting much at-tention (3...example given to support this contention. Flywheels are now being used in such diverse applications...

Arthur L. Robinson

1974-05-24T23:59:59.000Z

80

A power control strategy for flywheel doubly-fed induction machine storage system using artificial neural network  

Science Journals Connector (OSTI)

A large-capacity low-speed flywheel energy storage system (FESS) based on a doubly-fed induction machine (DFIM) consists of a wound-rotor induction machine and a back-to-back converter rated at 30–35% of the machine power rating used for rotor excitation. This system has been promoted as a viable mean of energy storage for power system applications as grid frequency support/control, uninterruptible power supply (UPS), power conditioning, and voltage sag mitigation. This paper presents a simple power control strategy based on artificial neural networks (ANN) to charge/discharge a flywheel DFIM (FW-DFIM) storage system while maintaining controllable grid side power. The proposed controller is based on conventional vector control system supplemented by an ANN-based current decoupling network used to develop the required rotor current components based on the required grid power level and flywheel instantaneous speed. The controller is designed to avoid overloading both stator and rotor circuits while the flywheel is charged/discharged. Additionally, it avoids using the required outer power loop or a hysteresis power controller, hence, simplifies the overall control algorithm. The validity of the developed concept along with the effectiveness and viability of the control strategy in power system applications is confirmed by computer simulation using Matlab/Simulink for a medium voltage 1000hp FW-DFIM. The simulation study is carried out for uninterruptible power supply (UPS) applications and power leveling to improve the quality of electric power delivered by wind generators.

A. Abdel-Khalik; A. Elserougi; A. Massoud; S. Ahmed

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Flywheel storage for photovoltaics: an economic evaluation of two applications  

E-Print Network (OSTI)

A worth analysis is made for an advanced flywheel storage concept for tandem operation with photovoltaics currently being developed at MIT/Lincoln Laboratories. The applications examined here are a single family residence ...

Dinwoodie, Thomas L.

1980-01-01T23:59:59.000Z

82

Interlayer toughening of fiber composite flywheel rotors  

SciTech Connect

An interlayer toughening mechanism to mitigate the growth of damage in fiber composite flywheel rotors for long application. The interlayer toughening mechanism may comprise one or more tough layers composed of high-elongation fibers, high-strength fibers arranged in a woven pattern at a range from 0.degree. to 90.degree. to the rotor axis and bound by a ductile matrix material which adheres to and is compatible with the materials used for the bulk of the rotor. The number and spacing of the tough interlayers is a function of the design requirements and expected lifetime of the rotor. The mechanism has particular application in uninterruptable power supplies, electrical power grid reservoirs, and compulsators for electric guns, as well as electromechanical batteries for vehicles.

Groves, Scott E. (Brentwood, CA); Deteresa, Steven J. (Livermore, CA)

1998-01-01T23:59:59.000Z

83

Crystallization Kinetics and Excess Free Energy of H2O and D2O...  

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

Crystallization Kinetics and Excess Free Energy of H2O and D2O Nanoscale Films of Amorphous Solid Water. Crystallization Kinetics and Excess Free Energy of H2O and D2O Nanoscale...

84

Systems engineering analysis of kinetic energy weapon concepts  

SciTech Connect

This study examines, from a systems engineering design perspective, the potential of kinetic energy weapons being used in the role of a conventional strategic weapon. Within the Department of Energy (DOE) complex, strategic weapon experience falls predominantly in the nuclear weapons arena. The techniques developed over the years may not be the most suitable methodologies for use in a new design/development arena. For this reason a more fundamental approach was pursued with the objective of developing an information base from which design decisions might be made concerning the conventional strategic weapon system concepts. The study examined (1) a number of generic missions, (2) the effects of a number of damage mechanisms from a physics perspective, (3) measures of effectiveness (MOE`s), and (4) a design envelope for kinetic energy weapon concepts. With the base of information a cut at developing a set of high-level system requirements was made, and a number of concepts were assessed against these requirements.

Senglaub, M.

1996-06-01T23:59:59.000Z

85

Plasmadynamics and ionization kinetics of thermionic energy conversion  

SciTech Connect

To reduce the plasma arc-drop, thermionic energy conversion is studied with both analytical and numerical tools. Simplifications are made in both the plasmadynamic and ionization-recombination theories. These are applied to a scheme proposed presently using laser irradiation to enhance the ionization kinetics of the thermionic plasma and thereby reduce the arc-drop. It is also predicted that it is possible to generate the required laser light from a thermionic-type cesium plasma. The analysis takes advantage of theoretical simplifications derived for the ionization-recombination kinetics. It is shown that large laser ionization enhancements can occur and that collisional cesium recombination lasing is expected. To complement the kinetic theory, a numerical method is developed to solve the thermionic plasma dynamics. To combine the analysis of ionization-recombination kinetics with the plasma dynamics of thermionic conversion, a finite difference computer program is constructed. It is capable of solving for both unsteady and steady thermionic converter behavior including possible laser ionization enhancement or atomic recombination lasing. A proposal to improve thermionic converter performance using laser radiation is considered. In this proposed scheme, laser radiation impinging on a thermionic plasma enhances the ionization process thereby raising the plasma density and reducing the plasma arc-drop. A source for such radiation may possibly be a cesium recombination laser operating in a different thermionic converter. The possibility of this being an energy efficient process is discussed. (WHK)

Lawless, J.L. Jr.; Lam, S.H.

1982-02-01T23:59:59.000Z

86

A parametric sensitivity study of entropy production and kinetic energy dissipation using the FAMOUS AOGCM  

E-Print Network (OSTI)

A parametric sensitivity study of entropy production and kinetic energy dissipation using of APE and entropy production associated with kinetic energy dissipation, with the standard FAMOUS values of the conjecture of maximum APE production (or equivalently maximum dissipation of kinetic energy). Keywords

Ambaum, Maarten

87

On Measuring the Terms of the Turbulent Kinetic Energy Budget from an AUV LOUIS GOODMAN  

E-Print Network (OSTI)

of production of turbulent kinetic energy (TKE). Heat flux is obtained by correlating the vertical velocityOn Measuring the Terms of the Turbulent Kinetic Energy Budget from an AUV LOUIS GOODMAN School of the steady-state, homogeneous turbulent kinetic energy budgets are obtained from mea- surements of turbulence

Goodman, Louis

88

Kinetic Energy Recovery System for Sailing Yachts: Preliminary Experimental Results  

Science Journals Connector (OSTI)

Abstract SEAKERS (SEA Kinetic Energy Recovery System) is a research project, funded within the 7th EU Framework Program, whose goal is to develop an innovative device consisting in a model of a kinetic energy recovery system for sailing yachts, based on the conversion of wave-induced boat oscillations (heave, pitch and roll) into electric energy by means of a linear generator. The device aims at recovering as much kinetic energy as possible from the natural movements of a sailing yacht on the sea, therefore taking the view of a boat as a moving wave energy converter with energy harvesting capability. The boat's motions can be vertical oscillations due to the buoyancy in the presence of sea waves and rolling and pitching motions originated both by sailing in wavy waters and by the normal boat dynamics due to the sails’ propulsion. This paper presents a brief description of the prototype of linear generator, which has been developed in the SEAKERS project, and reports about the first experimental tests carried out on the prototype. Two kind of tests have been performed on the generator, which can be classified as a linear permanent magnet switched reluctance generator: first, the possibility to use the prototype like an actuator has been investigated, in order to force the cursor to have a motion in phase with the external forcing, so as to recover more energy when the machine acts as generator. The behaviour of the actuator was examined in a static way, measuring the forces between cursor and stator, varying relative position of cursor and current in the coils. The second kind of tests has been performed to analyse the efficiency of the generator, for different external loads and translational velocities. The trend shown in these tests are then explained by an analytical model based on an electromagnetic circuit.

Giuseppe Leo Guizzi; Michele Manno; Guido Manzi; Marco Salvatori; Domenico Serpella

2014-01-01T23:59:59.000Z

89

Vycon Inc | Open Energy Information  

Open Energy Info (EERE)

navigation, search Name: Vycon Inc Place: Cerritos, California Zip: 90703 Product: Vycon markets and manufactures flywheel energy storage systems for a wide range of applications...

90

Plasmadynamics and ionization kinetics of thermionic energy conversion  

SciTech Connect

To reduce the plasma arc-drop, thermionic energy conversion is studied with both analytical and numerical tools. Simplifications are made in both the plasmadynamic and ionization-recombination theories. These are applied to a scheme proposed presently using laser irradiation to enhance the ionization kinetics of the thermionic plasma and thereby reduce the arc-drop. It is also predicted that it is possible to generate the required laser light from a thermionic-type Cesium plasma. The analysis takes advantage of theoretical simplifications derived for the ionization-recombination kinetics. It is shown that large laser ionization enhancements can occur and that collisional Cesium recombination lasing is expected. To complement the kinetic theory, a numerical method is developed to solve the thermionic plasma dynamics. The effects of the complete system of electron-atom inelastic collisions on the ionization-recombination problem are shown to reduce to a system nearly as simple as the well-known one-quantum approximation. To combine the above analysis of ionization-recombination kinetics with the plasma dynamics of thermionic conversion, a finite difference computer program is constructed. Using the above developments, a proposal to improve thermionic converter performance using laser radiation is considered. In this proposed scheme, laser radiation impinging on a thermionic plasma enhances the ionization process thereby raising the plasma density and reducing the plasma arc-drop. A source for such radiation may possibly be a Cesium recombination laser operating in a different thermionic converter. The possibility of this being an energy efficient process is discussed.

Lawless, J.L. Jr.

1981-01-01T23:59:59.000Z

91

The conservative cascade of kinetic energy in compressible turbulence  

E-Print Network (OSTI)

The physical nature of compressible turbulence is of fundamental importance in a variety of astrophysical settings. We present the first direct evidence that mean kinetic energy cascades conservatively beyond a transitional "conversion" scale-range despite not being an invariant of the compressible flow dynamics. We use high-resolution three-dimensional simulations of compressible hydrodynamic turbulence on $512^3$ and $1024^3$ grids. We probe regimes of forced steady-state isothermal flows and of unforced decaying ideal gas flows. The key quantity we measure is pressure dilatation cospectrum, $E^{PD}(k)$, where we provide the first numerical evidence that it decays at a rate faster than $k^{-1}$ as a function of wavenumber. This is sufficient to imply that mean pressure dilatation acts primarily at large-scales and that kinetic and internal energy budgets statistically decouple beyond a transitional scale-range. Our results suggest that an extension of Kolmogorov's inertial-range theory to compressible turbulence is possible.

Hussein Aluie; Shengtai Li; Hui Li

2011-07-28T23:59:59.000Z

92

The conservative cascade of kinetic energy in compressible turbulence  

E-Print Network (OSTI)

The physical nature of compressible turbulence is of fundamental importance in a variety of astrophysical settings. We present the first direct evidence that mean kinetic energy cascades conservatively beyond a transitional "conversion" scale-range despite not being an invariant of the compressible flow dynamics. We use high-resolution three-dimensional simulations of compressible hydrodynamic turbulence on $512^3$ and $1024^3$ grids. We probe regimes of forced steady-state isothermal flows and of unforced decaying ideal gas flows. The key quantity we measure is pressure dilatation cospectrum, $E^{PD}(k)$, where we provide the first numerical evidence that it decays at a rate faster than $k^{-1}$ as a function of wavenumber. This is sufficient to imply that mean pressure dilatation acts primarily at large-scales and that kinetic and internal energy budgets statistically decouple beyond a transitional scale-range. Our results suggest that an extension of Kolmogorov's inertial-range theory to compressible turbu...

Aluie, Hussein; Li, Hui

2011-01-01T23:59:59.000Z

93

The Excitation Energy Dependence of the Total Kinetic Energy Release in 235U(n,f)  

E-Print Network (OSTI)

The total kinetic energy release in the neutron induced fission of $^{235}$U was measured (using white spectrum neutrons from LANSCE) for neutron energies from E$_{n}$ = 3.2 to 50 MeV. In this energy range the average post-neutron total kinetic energy release drops from 167.4 $\\pm$ 0.7 to 162.1 $\\pm$ 0.8 MeV, exhibiting a local dip near the second chance fission threshold. The values and the slope of the TKE vs. E$_{n}$ agree with previous measurements but do disagree (in magnitude) with systematics. The variances of the TKE distributions are larger than expected and apart from structure near the second chance fission threshold, are invariant for the neutron energy range from 11 to 50 MeV. We also report the dependence of the total excitation energy in fission, TXE, on neutron energy.

R. Yanez; L. Yao; J. King; W. Loveland; F. Tovesson; N. Fotiades

2014-03-18T23:59:59.000Z

94

On a Broken Formal Symmetry between Kinetic and Gravitational Energy  

E-Print Network (OSTI)

Historically, the discovery of symmetries has played an important role in the progress of our fundamental understanding of nature. This paper will demonstrate that there exists in Newtonian theory in a spherical gravitational field a formal symmetry between the kinetic (KE) and gravitational potential energy (GPE) of a test mass. Put differently, there exists a way of expressing GPE such that the form of the mathematical expression remains invariant under an interchange of KE and GPE. When extended to relativity by a suitable assumption, it leads to a framework that bridges the general relativistic and Newtonian conceptions of gravitational energy, even though the symmetry is broken except in the infinitesimal limit. Recognizing this symmetry at infinitesimal scales makes it possible to write a relativistic equation of an individual graviton, the properties of which under under one interpretation may be unexpected.

Armin Nikkhah Shirazi

2014-07-16T23:59:59.000Z

95

The transfer between electron bulk kinetic energy and thermal energy in collisionless magnetic reconnection  

SciTech Connect

By performing two-dimensional particle-in-cell simulations, we investigate the transfer between electron bulk kinetic and electron thermal energy in collisionless magnetic reconnection. In the vicinity of the X line, the electron bulk kinetic energy density is much larger than the electron thermal energy density. The evolution of the electron bulk kinetic energy is mainly determined by the work done by the electric field force and electron pressure gradient force. The work done by the electron gradient pressure force in the vicinity of the X line is changed to the electron enthalpy flux. In the magnetic island, the electron enthalpy flux is transferred to the electron thermal energy due to the compressibility of the plasma in the magnetic island. The compression of the plasma in the magnetic island is the consequence of the electromagnetic force acting on the plasma as the magnetic field lines release their tension after being reconnected. Therefore, we can observe that in the magnetic island the electron thermal energy density is much larger than the electron bulk kinetic energy density.

Lu, San; Lu, Quanming; Huang, Can; Wang, Shui [CAS Key Lab of Basic Plasma Physics, University of Science and Technology of China, Hefei 230026 (China)] [CAS Key Lab of Basic Plasma Physics, University of Science and Technology of China, Hefei 230026 (China)

2013-06-15T23:59:59.000Z

96

The magnetic flywheel flow meter: Theoretical and experimental contributions  

SciTech Connect

The development of contactless flow meters is an important issue for monitoring and controlling of processes in different application fields, like metallurgy, liquid metal casting, or cooling systems for nuclear reactors and transmutation machines. Shercliff described in his book “The Theory of Electromagnetic Flow Measurement, Cambridge University Press, 1962” a simple and robust device for contact-less measurements of liquid metal flow rates which is known as magnetic flywheel. The sensor consists of several permanent magnets attached on a rotatable soft iron plate. This arrangement will be placed closely to the liquid metal flow to be measured, so that the field of the permanent magnets penetrates into the fluid volume. The flywheel will be accelerated by a Lorentz force arising from the interaction between the magnetic field and the moving liquid. Steady rotation rates of the flywheel can be taken as a measure for the mean flow rate inside the fluid channel. The present paper provides a detailed theoretical description of the sensor in order to gain a better insight into the functional principle of the magnetic flywheel. Theoretical predictions are confirmed by corresponding laboratory experiments. For that purpose, a laboratory model of such a flow meter was built and tested on a GaInSn-loop under various test conditions.

Buchenau, D., E-mail: d.buchenau@hzdr.de; Galindo, V.; Eckert, S. [Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden (Germany)

2014-06-02T23:59:59.000Z

97

Beacon Power Corp | Open Energy Information  

Open Energy Info (EERE)

Beacon Power Corp Place: Tyngsboro, Massachusetts Zip: 1879 Sector: Solar Product: US-based developer of solar PV inverters and flywheel-based energy storage systems. References:...

98

On spherically symmetric metric satisfying the positive kinetic energy coordinate condition  

E-Print Network (OSTI)

Generally speaking, there is a negative kinetic energy term in the Lagrangian of the Einstein-Hilbert action of general relativity; On the other hand, the negative kinetic energy term can be vanished by designating a special coordinate system. For general spherically symmetric metric, the question that seeking special coordinate system that satisfies the positive kinetic energy coordinate condition is referred to solving a linear first-order partial differential equation. And then, we present a metric corresponding to the Reissner-Nordstrom solution that satisfies the positive kinetic energy coordinate condition. Finally, we discuss simply the case of the Tolman metric.

T. Mei

2008-02-28T23:59:59.000Z

99

E-Print Network 3.0 - axial kinetic energy Sample Search Results  

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

axial flow fan systems. Despite... -vortex-driven flow structures to increase the energy efficiency of axial flow fan systems to provide high quality... the mean kinetic...

100

A zinc-air battery and flywheel zero emission vehicle  

SciTech Connect

In response to the 1990 Clean Air Act, the California Air Resources Board (CARB) developed a compliance plan known as the Low Emission Vehicle Program. An integral part of that program was a sales mandate to the top seven automobile manufacturers requiring the percentage of Zero Emission Vehicles (ZEVs) sold in California to be 2% in 1998, 5% in 2001 and 10% by 2003. Currently available ZEV technology will probably not meet customer demand for range and moderate cost. A potential option to meet the CARB mandate is to use two Lawrence Livermore National Laboratory (LLNL) technologies, namely, zinc-air refuelable batteries (ZARBs) and electromechanical batteries (EMBs, i. e., flywheels) to develop a ZEV with a 384 kilometer (240 mile) urban range. This vehicle uses a 40 kW, 70 kWh ZARB for energy storage combined with a 102 kW, 0.5 kWh EMB for power peaking. These technologies are sufficiently near-term and cost-effective to plausibly be in production by the 1999-2001 time frame for stationary and initial vehicular applications. Unlike many other ZEVs currently being developed by industry, our proposed ZEV has range, acceleration, and size consistent with larger conventional passenger vehicles available today. Our life-cycle cost projections for this technology are lower than for Pb-acid battery ZEVs. We have used our Hybrid Vehicle Evaluation Code (HVEC) to simulate the performance of the vehicle and to size the various components. The use of conservative subsystem performance parameters and the resulting vehicle performance are discussed in detail.

Tokarz, F.; Smith, J.R.; Cooper, J.; Bender, D.; Aceves, S.

1995-10-03T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

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.

102

Mass independent kinetic energy reducing inlet system for vacuum environment  

DOE Patents (OSTI)

A particle inlet system comprises a first chamber having a limiting orifice for an incoming gas stream and a micrometer controlled expansion slit. Lateral components of the momentum of the particles are substantially cancelled due to symmetry of the configuration once the laminar flow converges at the expansion slit. The particles and flow into a second chamber, which is maintained at a lower pressure than the first chamber, and then moves into a third chamber including multipole guides for electromagnetically confining the particle. The vertical momentum of the particles descending through the center of the third chamber is minimized as an upward stream of gases reduces the downward momentum of the particles. The translational kinetic energy of the particles is near-zero irrespective of the mass of the particles at an exit opening of the third chamber, which may be advantageously employed to provide enhanced mass resolution in mass spectrometry.

Reilly, Peter T.A.

2014-05-13T23:59:59.000Z

103

Mass independent kinetic energy reducing inlet system for vacuum environment  

DOE Patents (OSTI)

A particle inlet system comprises a first chamber having a limiting orifice for an incoming gas stream and a micrometer controlled expansion slit. Lateral components of the momentum of the particles are substantially cancelled due to symmetry of the configuration once the laminar flow converges at the expansion slit. The particles and flow into a second chamber, which is maintained at a lower pressure than the first chamber, and then moves into a third chamber including multipole guides for electromagnetically confining the particle. The vertical momentum of the particles descending through the center of the third chamber is minimized as an upward stream of gases reduces the downward momentum of the particles. The translational kinetic energy of the particles is near-zero irrespective of the mass of the particles at an exit opening of the third chamber, which may be advantageously employed to provide enhanced mass resolution in mass spectrometry.

Reilly, Peter T. A. [Knoxville, TN

2010-12-14T23:59:59.000Z

104

Single-molecule kinetic energy of condensed normal deuterium  

Science Journals Connector (OSTI)

Inelastic scattering of 300-meV neutrons allows the study of the liquid (T=20 and 30 K, saturated vapor pressure) and solid (T=4.2 K, saturated vapor pressure) phases of the normal deuterium mixture (2/3 o-D2+1/3 p-D2) in the region of momentum transfer where a single-molecule response is expected. The spectra are analyzed within the impulse approximation and assuming Gaussian momentum distributions for the translation of the molecules. For the solid, the estimated value of the single-molecule average kinetic energy does not compare unfavorably with those obtained scaling experimental results in parahydrogen solids. In the liquid state, substantial departures seem to exist from the classical liquid behavior, even if up to second-order quantum corrections are taken into account. © 1996 The American Physical Society.

F. J. Mompeán; M. García-Hernández; F. J. Bermejo; S. M. Bennington

1996-07-01T23:59:59.000Z

105

Zero electron kinetic energy spectroscopy of the ArCl anion Thomas Lenzer,a)  

E-Print Network (OSTI)

and the neutral complexes are observed in the ZEKE spectra. From our spectroscopic data we construct modelZero electron kinetic energy spectroscopy of the ArCl anion Thomas Lenzer,a) Ivan Yourshaw, Berkeley, California 94720 Received 19 January 1999; accepted 23 February 1999 Zero electron kinetic energy

Neumark, Daniel M.

106

Zero electron kinetic energy spectroscopy of the XeCl Thomas Lenzer,a)  

E-Print Network (OSTI)

measurements for the neutral state we construct a Morse­Morse-switching­van der Waals model potential functionZero electron kinetic energy spectroscopy of the XeCl� anion Thomas Lenzer,a) Ivan Yourshaw, Berkeley, California 94720 Received 9 November 2001; accepted 21 December 2001 Zero electron kinetic energy

Neumark, Daniel M.

107

Power spectral analysis of Jupiter's clouds and kinetic energy from Cassini David S. Choi  

E-Print Network (OSTI)

of wind vectors and atmospheric kinetic energy within Jupiter's troposphere. We computed power spectraPower spectral analysis of Jupiter's clouds and kinetic energy from Cassini David S. Choi , Adam P o Article history: Received 16 December 2010 Revised 8 September 2011 Accepted 6 October 2011

108

Author's personal copy Power spectral analysis of Jupiter's clouds and kinetic energy from Cassini  

E-Print Network (OSTI)

full-longitudinal maps of wind vectors and atmospheric kinetic energy within Jupiter's troposphere. WeAuthor's personal copy Power spectral analysis of Jupiter's clouds and kinetic energy from Cassini 85721, USA a r t i c l e i n f o Article history: Received 16 December 2010 Revised 8 September 2011

Choi, David S.

109

An Approach to Kinetic Energy Diagnosis of Meso–Synoptic Scale interactions  

Science Journals Connector (OSTI)

To explicitly describe the energy exchange between meso and synoptic-scale motions, a diagnostic scheme of kinetic energy has been developed. By using a horizontal filtering technique, meteorological variables are separated into synoptic and ...

Shou-Jun Chen; Le-Sheng Bai; Ernest C. Kung

1990-12-01T23:59:59.000Z

110

Magnetic bearing development for support of satellite flywheels  

Science Journals Connector (OSTI)

The use of magnetic bearings (MB) for support of space based flywheels can provide significant improvement in efficiency due to reduction in drag torque. A NASA supported program directed through the Texas A&M Center for Space Power has been formed to advance the technology of MB’s for satellite flywheel applications. The five areas of the program are: (a) Magnetic Field Simulation (b) MB controller Development (c) Electromechanical Rotordynamics Modeling (d) Testing and (e) Technology Exchange. Planned innovations in these tasks include eddy current drag torque and power loss determination including moving conductor effects digital (DSP) based control for high speed operation MATLAB-based coupled flexible rotor/controller/actuator electromechanical model with fuzzy logic nonlinear control and ultra high speed>100?krpm measurement of drag torque. The paper examines these areas and provides an overview of the project.

Alan Palazzolo; Mu Li; Andrew Kenny; Shuliang Lei; Danny Havelka; Albert Kascak

1998-01-01T23:59:59.000Z

111

Micro Hydro Kinetic Turbines from Smart Hydro Power | Open Energy...  

Open Energy Info (EERE)

to the MHK database homepage Retrieved from "http:en.openei.orgwindex.php?titleMicroHydroKineticTurbinesfromSmartHydroPower&oldid720939" Category: Marine and...

112

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

113

Quasiperiodic Energy Dependence of Exciton Relaxation Kinetics in the Sexithiophene Crystal  

Science Journals Connector (OSTI)

Quasiperiodic Energy Dependence of Exciton Relaxation Kinetics in the Sexithiophene Crystal ... Femtosecond kinetics of fluorescence rise in the sexithiophene crystal is studied on a microscopic model of intraband relaxation, where exciton energy is assumed to be dissipated by phonon-accompanied scattering, with the rates calculated earlier. ... Not only the time scale but also the shape of the rise curves is found to be unusually sensitive to excitation energy, exhibiting unique quasiperiodic dependence thereon, which is rationalized in terms of the underlying model. ...

Piotr Petelenz; Emil ?ak

2014-09-16T23:59:59.000Z

114

California | Department of Energy  

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

10, 2010 10, 2010 CX-001055: Categorical Exclusion Determination American Recovery and Reinvestment Act - Energy Efficiency and Conservation Block Grant City of Los Angeles Strategy CX(s) Applied: A9, A11, B5.1 Date: 02/10/2010 Location(s): Los Angeles, California Office(s): Energy Efficiency and Renewable Energy, Golden Field Office February 9, 2010 CX-000760: Categorical Exclusion Determination Amber Kinetics Flywheel Energy Storage Demonstration CX(s) Applied: B3.6 Date: 02/09/2010 Location(s): Freemont, California Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory February 8, 2010 CX-000665: Categorical Exclusion Determination Development of an Advanced Stimulation/Production Predictive Simulator for Enhanced Geothermal Systems

115

Spider orb webs rely on radial threads to absorb prey kinetic energy  

Science Journals Connector (OSTI)

...points. A planar grid with 2.54 cm...a range in the energy that we compute...projectiles The pre-impact kinetic energy...radial thread energy absorption when...damping). The energy (R) dissipated...air during prey impact at velocities...are derived from wind or water tunnel...

2012-01-01T23:59:59.000Z

116

Statistical Prediction of Integrated Kinetic Energy in North Atlantic Tropical Cyclones  

Science Journals Connector (OSTI)

Integrated kinetic energy (IKE) is a useful quantity that measures the size and strength of a tropical cyclone wind field. As a result, it is inherently related to the destructive potential of these powerful storms. In most current operational ...

Michael E. Kozar; Vasubandhu Misra

2014-12-01T23:59:59.000Z

117

Using an ADCP to estimate turbulent kinetic energy dissipation rate in sheltered coastal waters  

Science Journals Connector (OSTI)

Turbulent microstructure and acoustic Doppler current profiler (ADCP) data were collected near Tacoma Narrows in Puget Sound, WA. Over 100 coincident microstructure profiles have been compared to ADCP estimates of turbulent kinetic energy ...

A. D. Greene; P. J. Hendricks; M. C. Gregg

118

On Measuring the Terms of the Turbulent Kinetic Energy Budget from an AUV  

Science Journals Connector (OSTI)

The terms of the steady-state, homogeneous turbulent kinetic energy budgets are obtained from measurements of turbulence and fine structure from the small autonomous underwater vehicle (AUV) Remote Environmental Measuring Units (REMUS). The ...

Louis Goodman; Edward R. Levine; Rolf G. Lueck

2006-07-01T23:59:59.000Z

119

Microprocessor Field Impactometer Calibration: Do We Measure Drops’ Momentum or Their Kinetic Energy?  

Science Journals Connector (OSTI)

This study presents the construction and calibration of a low-cost piezoelectric microprocessor impactometer designed for the field measurements of the rainfall kinetic energy (KE) flux. Its precise calibration was performed in laboratory ...

Pawe? Licznar; Janusz ?omotowski; S?awomir B?o?ski; Grzegorz J. Ciach

2008-05-01T23:59:59.000Z

120

Measurement of Turbulent Kinetic Energy Dissipation Rate with a Lagrangian Float  

Science Journals Connector (OSTI)

This study tests the ability of a neutrally buoyant float to estimate the dissipation rate of turbulent kinetic energy ? from its vertical acceleration spectrum using an inertial subrange method. A Lagrangian float was equipped with a SonTek ...

Ren-Chieh Lien; Eric A. D'Asaro

2006-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Atmospheric Kinetic Energy Spectra from Global High-Resolution Nonhydrostatic Simulations  

Science Journals Connector (OSTI)

Kinetic energy (KE) spectra derived from global high-resolution atmospheric simulations from the Model for Prediction Across Scales (MPAS) are presented. The simulations are produced using quasi-uniform global Voronoi horizontal meshes with 3-, ...

William C. Skamarock; Sang-Hun Park; Joseph B. Klemp; Chris Snyder

2014-11-01T23:59:59.000Z

122

Path-integral Monte Carlo calculation of the kinetic energy of condensed lithium  

Science Journals Connector (OSTI)

We report path-integral Monte Carlo calculations of the kinetic energy of condensed lithium for several temperatures in both the solid and liquid phases. The excess kinetic energy of lithium decreases from about 10.4% of the classical value at 300 K to 3.2% at 520 K indicating a very slow decay with temperature. A Wigner-Kirkwood perturbation treatment of quantum effects to order ?2 gives a satisfactory agreement with the path-integral results.

Claudia Filippi and David M. Ceperley

1998-01-01T23:59:59.000Z

123

Amber Kinetics, Inc. Smart Grid Demonstration Project | Open Energy  

Open Energy Info (EERE)

Kinetics, Inc. Smart Grid Demonstration Project Kinetics, Inc. Smart Grid Demonstration Project Jump to: navigation, search Project Lead Amber Kinetics, Inc. Country United States Headquarters Location Fremont, California Recovery Act Funding $4,000,000.00 Total Project Value $10,000,000.00 Coordinates 37.5482697°, -121.9885719° 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":[]}

124

Interface structure for hub and mass attachment in flywheel rotors  

DOE Patents (OSTI)

An interface structure for hub and mass attachment in flywheel rotors. The interface structure efficiently transmits high radial compression forces and withstands both large circumferential elongation and local stresses generated by mass-loading and hub attachments. The interface structure is comprised of high-strength fiber, such as glass and carbon, woven into an angle pattern which is about 45.degree. with respect to the rotor axis. The woven fiber is bonded by a ductile matrix material which is compatible with and adheres to the rotor material. This woven fiber is able to elongate in the circumferential direction to match the rotor growth during spinning.

Deteresa, Steven J. (Livermore, CA); Groves, Scott E. (Brentwood, CA)

1998-06-02T23:59:59.000Z

125

Interface structure for hub and mass attachment in flywheel rotors  

DOE Patents (OSTI)

An interface structure is described for hub and mass attachment in flywheel rotors. The interface structure efficiently transmits high radial compression forces and withstands both large circumferential elongation and local stresses generated by mass-loading and hub attachments. The interface structure is comprised of high-strength fiber, such as glass and carbon, woven into an angle pattern which is about 45{degree} with respect to the rotor axis. The woven fiber is bonded by a ductile matrix material which is compatible with and adheres to the rotor material. This woven fiber is able to elongate in the circumferential direction to match the rotor growth during spinning. 2 figs.

Deteresa, S.J.; Groves, S.E.

1998-06-02T23:59:59.000Z

126

A Kinetic Energy Budget and Internal Instabilities in the Fine Resolution Antarctic Model  

Science Journals Connector (OSTI)

An energy analysis of the Fine Resolution Antarctic Model (FRAM) reveals the instability processes in the model. The main source of time-mean kinetic energy is the wind stress and the main sink is transfer to mean potential energy. The wind ...

V. O. Ivchenko; A. M. Treguier; S. E. Best

1997-01-01T23:59:59.000Z

127

Wind turbines convert the kinetic energy in moving air into rotational energy, which in turn is converted  

E-Print Network (OSTI)

Wind turbines convert the kinetic energy in moving air into rotational energy, which in turn of electricity wind can make varies constantly. Sometimes a wind turbine will make no power at all is an indicator of how much energy a particular wind turbine makes in a particular place. Continued on page 2 #12

Massachusetts at Amherst, University of

128

Analysis of electromechanical interactions in a flywheel system with a doubly fed induction machine  

E-Print Network (OSTI)

This paper analyzes the electromechanical inter-action in a flywheel system with a doubly fed induction machine, used for wind farm power smoothing or grid frequency response control. The grid-connected electrical machine ...

Ran, Li

129

Flywheel Cooling: A Cooling Solution for Non Air-Conditioned Buildings  

E-Print Network (OSTI)

"Flywheel Cooling" utillzes the natural cooling processes of evaporation, ventilation and air circulation. These systems are providing low-cost cooling for distribution centers, warehouses, and other non air-conditioned industrial assembly plants...

Abernethy, D.

130

Design and analysis of a composite flywheel preload loss test rig  

E-Print Network (OSTI)

process. Successful detection of the change in mass eccentricity was verified analytically through dynamic modeling of the flywheel rotor and magnetic suspension system. During steady state operation detection was determined to be feasible via...

Preuss, Jason Lee

2004-09-30T23:59:59.000Z

131

Barotropic Impacts of Surface Friction on Eddy Kinetic Energy and Momentum Fluxes: An Alternative to the Barotropic Governor  

E-Print Network (OSTI)

Barotropic Impacts of Surface Friction on Eddy Kinetic Energy and Momentum Fluxes: An Alternative energy decreases, a response that is inconsistent with the conventional barotropic governor mechanism on eddy momentum fluxes and eddy kinetic energy. Analysis of the pseudomomentum budget shows

Garfinkel, Chaim I.

132

Analytic results for Gaussian wave packets in four model systems: I. Visualization of the kinetic energy  

E-Print Network (OSTI)

Using Gaussian wave packet solutions, we examine how the kinetic energy is distributed in time-dependent solutions of the Schrodinger equation corresponding to the cases of a free particle, a particle undergoing uniform acceleration, a particle in a harmonic oscillator potential, and a system corresponding to an unstable equilibrium. We find, for specific choices of initial parameters, that as much as 90% of the kinetic energy can be localized (at least conceptually) in the `front half' of such Gaussian wave packets, and we visualize these effects.

R. W. Robinett; L. C. Bassett

2004-08-06T23:59:59.000Z

133

Kinetic energy and the Born-Green-Yvon method for fermion quantum fluids  

Science Journals Connector (OSTI)

The Born-Green-Yvon (BGY) equations for two-body distribution functions of fermion-Jastrow many-body trial functions are derived using a diagrammatic method. Also derived are the Jackson-Feenberg and Pandharipande-Bethe expressions for the kinetic energy of this function in terms of partial two- and three-body distribution functions. Simple approximations for these three-body functions are then used in the BGY equations and the kinetic energies and are solved for the ground state of liquid He3.

C. E. Campbell; K. E. Kürten; E. Krotscheck

1982-02-01T23:59:59.000Z

134

Influence of the Richtmyer-Meshkov instability on the kinetic energy spectrum.  

SciTech Connect

The fluctuating kinetic energy spectrum in the region near the Richtmyer-Meshkov instability (RMI) is experimentally investigated using particle image velocimetry (PIV). The velocity field is measured at a high spatial resolution in the light gas to observe the effects of turbulence production and dissipation. It is found that the RMI acts as a source of turbulence production near the unstable interface, where energy is transferred from the scales of the perturbation to smaller scales until dissipation. The interface also has an effect on the kinetic energy spectrum farther away by means of the distorted reflected shock wave. The energy spectrum far from the interface initially has a higher energy content than that of similar experiments with a flat interface. These differences are quick to disappear as dissipation dominates the flow far from the interface.

Weber, Christopher R. (University of Wisconsin-Madison, Madison, WI)

2010-09-01T23:59:59.000Z

135

Wave Turbulence in Superfluid 4 Energy Cascades, Rogue Waves & Kinetic Phenomena  

E-Print Network (OSTI)

Outline Wave Turbulence in Superfluid 4 He: Energy Cascades, Rogue Waves & Kinetic Phenomena Conference, Chernogolovka, 3 August 2009 McClintock Efimov Ganshin Kolmakov Mezhov-Deglin Wave Turbulence in Superfluid 4 He #12;Outline Outline 1 Introduction Motivation 2 Modelling wave turbulence Need for models

Fominov, Yakov

136

Zero electron kinetic energy and photoelectron spectroscopy of the XeI anion  

E-Print Network (OSTI)

spectroscopic data we construct model potentials for the anion and three neutral states, which are comparedZero electron kinetic energy and photoelectron spectroscopy of the XeI anion Thomas Lenzer, Michael and the corresponding neutral X1/2, I3/2, and II1/2 electronic states have been studied by means of zero electron

Neumark, Daniel M.

137

Energy Blog | Department of Energy  

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

30, 2010 30, 2010 Seven-foot tall cylinders equipped with flywheel technology (shown above) will make up Beacon Power's energy storage plant in Stephentown, N.Y. The company received a $43 million loan guarantee from the Energy Department to build the plant. | Photo courtesy of Beacon Power Corporation 'Recycling' Grid Energy with Flywheel Technology Beacon Power in New York is using innovative flywheel technology to manage and store energy better -- it continuously absorbs and injects electricity. September 30, 2010 Renovations to Pinehurst's City Hall are saving residents of this bedroom community $1,335 a year | Photo courtesy of Pinehurst Big Energy Savings for Small Idaho City The Pinehurst City Hall had been in need of renovations for quite some time. Constructed in the 1960s, the building had received few physical

138

Interaction between a high-kinetic-energy plasma jet and a target surface  

SciTech Connect

A model is constructed to estimate the net energy deposited on a target wall bombarded by a plasma jet with gross kinetic energy much greater than its temperature and with density on the order of about 10/sup 19//cc (such as the plasma generated by a rail gun). Both one- and two-dimensional cases are examined to study the interactions between incident and reflected plasma ions. The results show that the reflected plasma plays an essential role in stopping the incident plasma energy over some small range of parameters.

Chen, Y.K.; Varghese, P.L.; Howell, J.R.

1986-12-01T23:59:59.000Z

139

Energy Storage Systems 2010 Update Conference Presentations - Day 2,  

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

4 4 Energy Storage Systems 2010 Update Conference Presentations - Day 2, Session 4 The U.S. DOE Energy Storage Systems Program (ESS) conducted a record-breaking Update Conference at the Washington DC Marriott Hotel on Nov. 2 - 4, 2010, with more than 500 attendees. The 2010 agenda reflected increased national interest in energy storage issues. The 3-day conference included 11 sessions plus a poster session on the final day. Presentations from the fourth session of Day 2, chaired by NETL's Kim Nuhfer, are below. ESS 2010 Update Conference - Low Cost Energy Storage - Ted Wiley, Aquion.pdf Ess 2010 Update Conference - Solid State Li Metal Batteries for Grid-Scale Storage - Mohit Singh, Seeo.pdf ESS 2010 Update Conference - Utility Scale Flywheel Energy Storage Demonstration - Edward Chiao, Amber Kinetics.pdf

140

Phase 1 STTR flywheel motor/alternator for hybrid electric vehicles. CRADA final report  

SciTech Connect

Visual Computing Systems (VCS) and the Oak Ridge National Laboratory (ORNL) have teamed, through a Phase 1 Small Business Technology Transfer (STTR) grant from the US Department of Energy (DOE), to develop an advanced, low-cost motor/alternator drive system suitable for Flywheel Energy Storage (FES) applications. During Phase 1, system performance and design requirements were established, design concepts were generated, and preliminary motor/alternator designs were developed and analyzed. ORNL provided mechanical design and finite element collaboration and Lynx Motion Technology, a spin-off from VCS to commercialize their technology, constructed a proof-of-concept axial-gap permanent magnet motor/alternator that employed their Segmented Electromagnetic Array (SEMA) with a survivable design speed potential of 10,000 rpm. The VCS motor/alternator was successfully tested in ORNL`s Motor Test Tank using an ORNL inverter and ORNL control electronics. It was first operated as an unloaded motor to 6,000 rpm and driven as an unloaded generator to 6,000 rpm. Output from the generator was then connected to a resistance bank, which caused the loaded generator to decelerate to 3,860 rpm where data was collected. After about 4-1/2 minutes, the test was terminated because of an impact noise. Subsequent inspection and operation at low speeds did not reveal the source of the noise. Electrical performance of the motor was excellent, encouraging continued development of this technology. Phase 2 efforts will focus on further design development and optimization, manufacturing development and prototype construction, testing, and evaluation.

McKeever, J.W.; Scudiere, M.B.; Ott, G.W. Jr.; White, C.P. [Oak Ridge National Lab., TN (United States); Kessinger, R.L. Jr.; Robinson, S.T.; Seymour, K.P.; Dockstadter, K.D. [Visual Computer Systems Corp., Greenville, IN (United States)

1997-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Thermal characterization and pyrolysis kinetics of tropical biomass feedstocks for energy recovery  

Science Journals Connector (OSTI)

Abstract This paper aims to analyse energy related properties, thermal degradation behaviour and devolatilization kinetics of five Cameroonian biomasses namely, Palm Kernel Shells (PKS), Mesocarp Fibres (PMF), Coffee Husk (CH), Corn Cob (CC) and Peanut Shell (PNS). The thermal degradation was performed using thermogravimetric analysis (TG). Different behaviours related to the presence of chemical constituents such as cellulose, hemicellulose and lignin were obtained. Comparison of the thermal characterization shows that PMF is the most interesting feedstock with the highest heating values and reactivity due to higher volatile content. Decomposition of TG data was analysed by applying diffusion and chemical reaction kinetic models. Obtained results show that biomass pyrolysis is represented by two successive steps. The devolatilization stage characterized by high weight loss rate is well described by diffusion reaction models. In contrast, the char formation stage characterized by low weight loss rate is well described by third order chemical reaction models.

M. Jeguirim; J. Bikai; Y. Elmay; L. Limousy; E. Njeugna

2014-01-01T23:59:59.000Z

142

Condition on the KohnSham kinetic energy and modern parametrization of the ThomasFermi density  

E-Print Network (OSTI)

; published online 20 January 2009 We study the asymptotic expansion of the neutral-atom energy as the atomic-correlation energy, EXC n , must be approximated. But a direct, orbital-free DFT could be constructed if onlyCondition on the Kohn­Sham kinetic energy and modern parametrization of the Thomas­Fermi density

Burke, Kieron

143

Flywheel-Based Distributed Bus Signalling Strategy for the Public Fast Charging Station  

E-Print Network (OSTI)

to vehicle owners since the off-road time is similar as for refuelling at conventional public gas stations1 Flywheel-Based Distributed Bus Signalling Strategy for the Public Fast Charging Station Tomislav M. Guerrero, Senior Member, IEEE Abstract--Fast charging stations (FCS) are able to recharge plug

Vasquez, Juan Carlos

144

Enhanced von Weizsäcker Wang-Govind-Carter kinetic energy density functional for semiconductors  

SciTech Connect

We propose a new form of orbital-free (OF) kinetic energy density functional (KEDF) for semiconductors that is based on the Wang-Govind-Carter (WGC99) nonlocal KEDF. We enhance within the latter the semi-local von Weizsäcker KEDF term, which is exact for a single orbital. The enhancement factor we introduce is related to the extent to which the electron density is localized. The accuracy of the new KEDF is benchmarked against Kohn-Sham density functional theory (KSDFT) by comparing predicted energy differences between phases, equilibrium volumes, and bulk moduli for various semiconductors, along with metal-insulator phase transition pressures. We also compare point defect and (100) surface energies in silicon for a broad test of its applicability. This new KEDF accurately reproduces the exact non-interacting kinetic energy of KSDFT with only one additional adjustable parameter beyond the three parameters in the WGC99 KEDF; it exhibits good transferability between semiconducting to metallic silicon phases and between various III-V semiconductors without parameter adjustment. Overall, this KEDF is more accurate than previously proposed OF KEDFs (e.g., the Huang-Carter (HC) KEDF) for semiconductors, while the computational efficiency remains at the level of the WGC99 KEDF (several hundred times faster than the HC KEDF). This accurate, fast, and transferable new KEDF holds considerable promise for large-scale OFDFT simulations of metallic through semiconducting materials.

Shin, Ilgyou [Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009 (United States)] [Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009 (United States); Carter, Emily A., E-mail: eac@princeton.edu [Department of Mechanical and Aerospace Engineering, Program in Applied and Computational Mathematics, and Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544-5263 (United States)

2014-05-14T23:59:59.000Z

145

Kinetic energy of protons in ice Ih and water: A path integral study  

Science Journals Connector (OSTI)

The kinetic energy of H and O nuclei has been studied by path integral molecular-dynamics simulations of ice Ih and water at ambient pressure. The simulations were performed by using the q-TIP4P/F model, a point-charge empirical potential that includes molecular flexibility and anharmonicity in the OH stretch of the water molecule. Ice Ih was studied in a temperature range between 210 and 290 K, and water between 230 and 320 K. Simulations of an isolated water molecule were performed in the range 210–320 K to estimate the contribution of the intramolecular vibrational modes to the kinetic energy. Our results for the proton kinetic energy KH in water and ice Ih show both agreement and discrepancies with different published data based on deep inelastic neutron-scattering experiments. Agreement is found for water at the experimental melting point and in the range 290–300 K. Discrepancies arise because data derived from the scattering experiments predict in water two maxima of KH around 270 and 277 K, and that KH is lower in ice than in water at 269 K. As a check of the validity of the employed water potential, we show that our simulations are consistent with other experimental thermodynamic properties related to KH, such as the temperature dependence of the liquid density, the heat capacity of water and ice at constant pressure, and the isotopic shift in the melting temperature of ice upon isotopic substitution of either H or O atoms. Moreover, the temperature dependence of KH predicted by the q-TIP4P/F model for ice Ih is found to be in good agreement with results of path integral simulations using ab initiodensity-functional theory.

R. Ramírez and C. P. Herrero

2011-08-31T23:59:59.000Z

146

A Look Inside the Detroit Auto Show | Department of Energy  

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

A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show January 12, 2011 - 1:15pm Addthis Kerry Duggan Waking up at 4:30AM is not my idea of fun. But after I witnessed the 6:30AM unveiling of the shiny new Porsche 918 RSR Hybrid at the North American International Auto Show, I got over it. To those who know cars, its lineage is in the #22 Porsche 917 race car, winner of the LeMans in 1971. With a top speed of 140 mph, the new 918 RSR combines the power of a 563-horsepower V-8 engine and a dual inertial flywheel system to produce a total 767-horsepower. On the efficiency side, a Kinetic Energy Recovery System (KERS) allows the two 75-kW flywheels to capture wasted energy when the brakes are applied. The Porsche president said that their goal is to achieve high fuel efficiency in extreme driving

147

A Look Inside the Detroit Auto Show | Department of Energy  

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

A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show A Look Inside the Detroit Auto Show January 12, 2011 - 1:15pm Addthis Kerry Duggan Waking up at 4:30AM is not my idea of fun. But after I witnessed the 6:30AM unveiling of the shiny new Porsche 918 RSR Hybrid at the North American International Auto Show, I got over it. To those who know cars, its lineage is in the #22 Porsche 917 race car, winner of the LeMans in 1971. With a top speed of 140 mph, the new 918 RSR combines the power of a 563-horsepower V-8 engine and a dual inertial flywheel system to produce a total 767-horsepower. On the efficiency side, a Kinetic Energy Recovery System (KERS) allows the two 75-kW flywheels to capture wasted energy when the brakes are applied. The Porsche president said that their goal is to achieve high fuel efficiency in extreme driving

148

Electromagnetic energy conversion in downstream fronts from three dimensional kinetic reconnection  

SciTech Connect

The electromagnetic energy equation is analyzed term by term in a 3D simulation of kinetic reconnection previously reported by Vapirev et al. [J. Geophys. Res.: Space Phys. 118, 1435 (2013)]. The evolution presents the usual 2D-like topological structures caused by an initial perturbation independent of the third dimension. However, downstream of the reconnection site, where the jetting plasma encounters the yet unperturbed pre-existing plasma, a downstream front is formed and made unstable by the strong density gradient and the unfavorable local acceleration field. The energy exchange between plasma and fields is most intense at the instability, reaching several pW/m{sup 3}, alternating between load (energy going from fields to particles) and generator (energy going from particles to fields) regions. Energy exchange is instead purely that of a load at the reconnection site itself in a region focused around the x-line and elongated along the separatrix surfaces. Poynting fluxes are generated at all energy exchange regions and travel away from the reconnection site transporting an energy signal of the order of about S?10{sup ?3}W/m{sup 2}.

Lapenta, Giovanni [Departement Wiskunde, KU Leuven, Universiteit Leuven (Belgium)] [Departement Wiskunde, KU Leuven, Universiteit Leuven (Belgium); Goldman, Martin; Newman, David [University of Colorado, Colorado 80309 (United States)] [University of Colorado, Colorado 80309 (United States); Markidis, Stefano [High Performance Computing and Visualization (HPCViz) Department, KTH Royal Institute of Technology, Stockholm (Sweden)] [High Performance Computing and Visualization (HPCViz) Department, KTH Royal Institute of Technology, Stockholm (Sweden); Divin, Andrey [Swedish Institute of Space Physics, Uppsala (Sweden)] [Swedish Institute of Space Physics, Uppsala (Sweden)

2014-05-15T23:59:59.000Z

149

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

150

Design and analysis of kinetic energy recovery system for automobiles: Case study for commuters in Edinburgh  

Science Journals Connector (OSTI)

Transport and its energetic and environmental impacts affect our daily lives. The transport sector is the backbone of the United Kingdom’s economy with 2.3 million people being employed in this sector. With a high dependency on transport for passengers and freight and with the knowledge that oil reserves are rapidly decreasing a solution has to be identified for conserving fuel. Passenger vehicles account for 61% of the transport fuel consumed in the U.K. and should be seen as a key area to tackle. Despite the introduction and development of electric powered cars the widespread infrastructure that is required is not in place and has attributed to their slow uptake as well as the fact that the electric car’s performance is not yet comparable with the conventional internal combustion engine. The benefits of the introduction of kinetic energy recovery systems to be used in conjunction with internal combustion engines and designed such that the system could easily be fitted into future passenger vehicles are examined. In this article a review of automobile kinetic energy recovery system is presented. It has been argued that the ultracapacitor technology offers a sustainable solution. An optimum design for the urban driving cycle experienced in the city of Edinburgh has been introduced. The potential for fuel savings is also presented.

John Walsh; Tariq Muneer; Ali N. Celik

2011-01-01T23:59:59.000Z

151

Electromagnetic Energy Conversion in Downstream Fronts from 3D Kinetic Reconnection  

E-Print Network (OSTI)

The electromagnetic energy equation is analyzed term by term in a 3D simulation of kinetic reconnection previously reported by \\citet{vapirev2013formation}. The evolution presents the usual 2D-like topological structures caused by an initial perturbation independent of the third dimension. However, downstream of the reconnection site, where the jetting plasma encounters the yet unperturbed pre-existing plasma, a downstream front (DF) is formed and made unstable by the strong density gradient and the unfavorable local acceleration field. The energy exchange between plasma and fields is most intense at the instability, reaching several $pW/m^3$, alternating between load (energy going from fields to particles) and generator (energy going from particles to fields) regions. Energy exchange is instead purely that of a load at the reconnection site itself in a region focused around the x-line and elongated along the separatrix surfaces. Poynting fluxes are generated at all energy exchange regions and travel away fro...

Lapenta, Giovanni; Newman, David; Markidis, Stefano; Divin, Andrey

2014-01-01T23:59:59.000Z

152

Hamilton's principle: why is the integrated difference of kinetic and potential energy minimized?  

E-Print Network (OSTI)

I present an intuitive answer to an often asked question: why is the integrated difference K-U between the kinetic and potential energy the quantity to be minimized in Hamilton's principle? Using elementary arguments, I map the problem of finding the path of a moving particle connecting two points to that of finding the minimum potential energy of a static string. The mapping implies that the configuration of a non--stretchable string of variable tension corresponds to the spatial path dictated by the Principle of Least Action; that of a stretchable string in space-time is the one dictated by Hamilton's principle. This correspondence provides the answer to the question above: while a downward force curves the trajectory of a particle in the (x,t) plane downward, an upward force of the same magnitude stretches the string to the same configuration x(t).

Alberto G. Rojo

2005-04-02T23:59:59.000Z

153

Covalent bonds are created by the drive of electron waves to lower their kinetic energy through expansion  

SciTech Connect

An analysis based on the variation principle shows that in the molecules H{sub 2}{sup +}, H{sub 2}, B{sub 2}, C{sub 2}, N{sub 2}, O{sub 2}, F{sub 2}, covalent bonding is driven by the attenuation of the kinetic energy that results from the delocalization of the electronic wave function. For molecular geometries around the equilibrium distance, two features of the wave function contribute to this delocalization: (i) Superposition of atomic orbitals extends the electronic wave function from one atom to two or more atoms; (ii) intra-atomic contraction of the atomic orbitals further increases the inter-atomic delocalization. The inter-atomic kinetic energy lowering that (perhaps counter-intuitively) is a consequence of the intra-atomic contractions drives these contractions (which per se would increase the energy). Since the contractions necessarily encompass both, the intra-atomic kinetic and potential energy changes (which add to a positive total), the fact that the intra-atomic potential energy change renders the total potential binding energy negative does not alter the fact that it is the kinetic delocalization energy that drives the bond formation.

Schmidt, Michael W.; Ruedenberg, Klaus, E-mail: ruedenberg@iastate.edu [Department of Chemistry and Ames Laboratory USDOE, Iowa State University, Ames, Iowa 50011 (United States); Ivanic, Joseph [Advanced Biomedical Computing Center, Information Systems Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702 (United States)

2014-05-28T23:59:59.000Z

154

Covalent bonds are created by the drive of electron waves to lower their kinetic energy through expansion  

SciTech Connect

An analysis based on the variation principle shows that in the molecules H2 +, H2, B2, C2, N2, O2, F2, covalent bonding is driven by the attenuation of the kinetic energy that results from the delocalization of the electronic wave function. For molecular geometries around the equilibrium distance, two features of the wave function contribute to this delocalization: (i) Superposition of atomic orbitals extends the electronic wave function from one atom to two or more atoms; (ii) intra-atomic contraction of the atomic orbitals further increases the inter-atomic delocalization. The inter-atomic kinetic energy lowering that (perhaps counter-intuitively) is a consequence of the intra-atomic contractions drives these contractions (which per se would increase the energy). Since the contractions necessarily encompass both, the intra-atomic kinetic and potential energy changes (which add to a positive total), the fact that the intra-atomic potential energy change renders the total potential binding energy negative does not alter the fact that it is the kinetic delocalization energy that drives the bond formation.

Schmidt, Michael W.; Ivanic, Joseph; Ruedenberg, Klaus

2014-05-28T23:59:59.000Z

155

Concentric ring flywheel with hooked ring carbon fiber separator/torque coupler  

DOE Patents (OSTI)

A concentric ring flywheel with expandable separators, which function as torque couplers, between the rings to take up the gap formed between adjacent rings due to differential expansion between different radius rings during rotation of the flywheel. The expandable separators or torque couplers include a hook-like section at an upper end which is positioned over an inner ring and a shelf-like or flange section at a lower end onto which the next adjacent outer ring is positioned. As the concentric rings are rotated the gap formed by the differential expansion there between is partially taken up by the expandable separators or torque couplers to maintain torque and centering attachment of the concentric rings.

Kuklo, Thomas C. (Oakdale, CA)

1999-01-01T23:59:59.000Z

156

Kinetic and electron-electron energies for convex sums of ground state densities with degeneracies and fractional electron number  

SciTech Connect

Properties of exact density functionals provide useful constraints for the development of new approximate functionals. This paper focuses on convex sums of ground-level densities. It is observed that the electronic kinetic energy of a convex sum of degenerate ground-level densities is equal to the convex sum of the kinetic energies of the individual degenerate densities. (The same type of relationship holds also for the electron-electron repulsion energy.) This extends a known property of the Levy-Valone Ensemble Constrained-Search and the Lieb Legendre-Transform refomulations of the Hohenberg-Kohn functional to the individual components of the functional. Moreover, we observe that the kinetic and electron-repulsion results also apply to densities with fractional electron number (even if there are no degeneracies), and we close with an analogous point-wise property involving the external potential. Examples where different degenerate states have different kinetic energy and electron-nuclear attraction energy are given; consequently, individual components of the ground state electronic energy can change abruptly when the molecular geometry changes. These discontinuities are predicted to be ubiquitous at conical intersections, complicating the development of universally applicable density-functional approximations.

Levy, Mel, E-mail: ayers@mcmaster.ca, E-mail: mlevy@tulane.edu [Department of Chemistry, Duke University, Durham, North Carolina 27708 (United States) [Department of Chemistry, Duke University, Durham, North Carolina 27708 (United States); Department of Physics, North Carolina A and T State University, Greensboro, North Carolina 27411 (United States); Department of Chemistry, Tulane University, New Orleans, Louisiana 70118 (United States); Anderson, James S. M.; Zadeh, Farnaz Heidar; Ayers, Paul W., E-mail: ayers@mcmaster.ca, E-mail: mlevy@tulane.edu [Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario (Canada)

2014-05-14T23:59:59.000Z

157

Energy Blog | Department of Energy  

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

9, 2010 9, 2010 Flywheel Project Escalates Grid Efficiency How does an energy storage plant recycle energy? Find out how flywheels are expanding the capacity for renewable energy sources. August 9, 2010 LEDs such as this are expected to save Altoona, Pa. thousands in energy costs. | File photo Lighting Retrofits Saving Energy, Helping Local Companies It's easy to measure the effects of a lighting retrofit project in a city like Altoona, Pa., where 169 new LED units are expected to save $4,078 in energy costs annually. But there are also other benefits to such energy efficiency initiatives, which can be seen in the local companies that make the projects possible... August 9, 2010 AcuTemp received a $900,000 48C manufacturing tax credit under the American Recovery and Reinvestment Act to increase production of the company's ThermoCor vacuum insulation panels for more efficient ENERGY STAR appliances. | Photo courtesy of AcuTemp |

158

4A.5 DERIVING TURBULENT KINETIC ENERGY DISSIPATION RATE WITHIN CLOUDS USING GROUND BASED 94 GHZ RADAR  

E-Print Network (OSTI)

distribution of the optical and microphysics properties. Turbulence is also directly linked to the life cycle is to perform spectral analysis on air- craft data (for instance Gultepe and Starr (1995)) or from ground based. The variance 1 #12;v 2 of the mean wind is an indicator of the kinetic energy in turbulent scales

Hogan, Robin

159

ON THE KINETIC ENERGY AND RADIATIVE EFFICIENCY OF GAMMA-RAY BURSTS Nicole M. Lloyd-Ronning1  

E-Print Network (OSTI)

ON THE KINETIC ENERGY AND RADIATIVE EFFICIENCY OF GAMMA-RAY BURSTS Nicole M. Lloyd-Ronning1 of 17 gamma-ray bursts (GRBs) during the afterglow phase and ac- counting for radiative losses, we the implications of these results for the GRB radiation and jet models. Subject headinggs: gamma rays: bursts

Zhang, Bing

160

Direct measurements of the mean flow and eddy kinetic energy structure of the upper ocean circulation in the NE Atlantic  

E-Print Network (OSTI)

Direct measurements of the mean flow and eddy kinetic energy structure of the upper ocean, University of Bergen, Bergen, Norway Tom Rossby Graduate School of Oceanography, University of Rhode Island and variable wind-forcing, and strong and variable deep currents that lead to large uncertainties in the use

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Efficiency of Magnetic to Kinetic Energy Conversion in a Monopole Magnetosphere  

Science Journals Connector (OSTI)

Unconfined relativistic outflows from rotating, magnetized compact objects are often well modeled by assuming that the field geometry is approximately a split-monopole at large radii. Earlier work has indicated that such an unconfined flow has an inefficient conversion of magnetic energy to kinetic energy. This has led to the conclusion that ideal magnetohydrodynamical (MHD) processes fail to explain observations of, e.g., the Crab pulsar wind at large radii where energy conversion appears efficient. In addition, as a model for astrophysical jets, the monopole field geometry has been abandoned in favor of externally confined jets since the latter appeared to be generically more efficient jet accelerators. We perform time-dependent axisymmetric relativistic MHD simulations in order to find steady-state solutions for a wind from a compact object endowed with a monopole field geometry. Our simulations follow the outflow for 10 orders of magnitude in distance from the compact object, which is large enough to study both the initial "acceleration zone" of the magnetized wind as well as the asymptotic "coasting zone." We obtain the surprising result that acceleration is actually efficient in the polar region, which develops a jet despite not being confined by an external medium. Our models contain jets that have sufficient energy to account for moderately energetic long and short gamma-ray burst (GRB) events (~1051-1052 erg), collimate into narrow opening angles (opening half-angle ? j ? 0.03 rad), become matter-dominated at large radii (electromagnetic energy flux per unit matter energy flux ? j ~ 200 for our fiducial model). The simulated jets have ? j ? j ~ 5-15, so they are in principle capable of generating "achromatic jet breaks" in GRB afterglow light curves. By defining a "causality surface" beyond which the jet cannot communicate with a generalized "magnetic nozzle" near the axis of rotation, we obtain approximate analytical solutions for the Lorentz factor that fit the numerical solutions well. This allows us to extend our results to monopole wind models with arbitrary magnetization. Overall, our results demonstrate that the production of ultrarelativistic jets is a more robust process than previously thought.

Alexander Tchekhovskoy; Jonathan C. McKinney; Ramesh Narayan

2009-01-01T23:59:59.000Z

162

Effects of He and Ar ion kinetic energies in protection of organosilicate glass from O{sub 2} plasma damage  

SciTech Connect

In-situ x-ray photoelectron spectroscopy (XPS) and ex-situ Fourier transform infrared studies of He plasma and Ar{sup +} ion bombardment pretreatments of organosilicate glass demonstrate that such pretreatments inhibit subsequent O{sub 2} plasma-induced carbon loss by forming a SiO{sub 2}-like damaged overlayer, and that the degree of protection correlates directly with increased ion kinetic energies, but not with the thickness of the SiO{sub 2} overlayer. This thickness is observed by XPS to be roughly constant and <1 nm regardless of ion energies involved. The data indicate that ion kinetic energies are an important parameter in protective noble gas plasma pretreatments to inhibit O{sub 2} plasma-induced carbon loss.

Lee, Joe; Graves, David B. [Department of Chemical Engineering, University of California-Berkeley, Berkeley, California 94720 (United States); Kazi, Haseeb; Gaddam, Sneha; Kelber, Jeffry A. [Department of Chemistry and Center for Electronic Materials Processing and Integration, University of North Texas, Denton, Texas 76203 (United States)

2013-07-15T23:59:59.000Z

163

Energy Research at the UW Crea ng sustainable energy sources  

E-Print Network (OSTI)

design: designing proteins for use in fuel cells and hydrogen produc on Solar: energy from the sun Tidal on energy use Fuel cells: conver ng fuels to electricity IT and telecommunica ons: transmi ng and processing renewable energy at the lowest cost Mechanical storage: flywheels, pumped storage, compressed gas Ba eries

Yetisgen-Yildiz, Meliha

164

The status and prospects for flywheels and SMES that incorporate HTS  

Science Journals Connector (OSTI)

With one firm offering to provide SMES with HTS current leads and several other entities developing flywheels with bearings that incorporate bulk ReBaCuO, the progress made toward meeting their technical goals appears promising. Another question needs attention from the research, development, and demonstration (RD&D) community: “Will technical success yield equipment that will sell?” Here, we recall what is being done and review issues touching on the specifications for equipment that customers might want. These specifications pose technical challenges that have received little attention from the community.

A.M. Wolsky

2002-01-01T23:59:59.000Z

165

Kinetics of Cdc42 Membrane Extraction by Rho-GDI Monitored by Real-Time Fluorescence Resonance Energy Transfer  

Science Journals Connector (OSTI)

Kinetics of Cdc42 Membrane Extraction by Rho-GDI Monitored by Real-Time Fluorescence Resonance Energy Transfer† ... This assay enabled us to directly monitor the (GDI-induced) release of Cdc42 from membranes. ... Specifically, we propose that the GDI first binds rapidly to membrane-associated Cdc42 and then a slower isomerization occurs which represents the rate-limiting step for the dissociation of the Cdc42?RhoGDI complex from membranes. ...

Tyzoon K. Nomanbhoy; Jon W. Erickson; Richard A. Cerione

1999-01-16T23:59:59.000Z

166

Part II Energy Storage Technologies  

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

II. II. Energy Storage Technology Overview * Instructor - Haresh Kamath, EPRI PEAC * Short term - Flywheels, Cranking Batteries, Electrochemical Capacitors, SMES * Long term - Compressed Air, Pumped Hydro storage, Stationary, Flow Batteries 2 Overview * Technology Types - Batteries, flywheels, electrochemical capacitors, SMES, compressed air, and pumped hydro * Theory of Operation - Brief description of the technologies and the differences between them * State-of-the-art - Past demonstrations, existing hurdles and performance targets for commercialization * Cost and cost projections: - Prototype cost vs. fully commercialized targets Technology Choice for Discharge Time and Power Rating (From ESA) 4 Maturity Levels for Energy Storage Technologies * Mature Technologies - Conventional pumped hydro

167

Distributed Energy | Department of Energy  

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

Distributed Distributed Energy Distributed Energy Distributed energy consists of a range of smaller-scale and modular devices designed to provide electricity, and sometimes also thermal energy, in locations close to consumers. They include fossil and renewable energy technologies (e.g., photovoltaic arrays, wind turbines, microturbines, reciprocating engines, fuel cells, combustion turbines, and steam turbines); energy storage devices (e.g., batteries and flywheels); and combined heat and power systems. Distributed energy offers solutions to many of the nation's most pressing energy and electric power problems, including blackouts and brownouts, energy security concerns, power quality issues, tighter emissions standards, transmission bottlenecks, and the desire for greater control over energy costs.

168

CX-004955: Categorical Exclusion Determination | Department of Energy  

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

5: Categorical Exclusion Determination 5: Categorical Exclusion Determination CX-004955: Categorical Exclusion Determination Beacon Power -Development of a 100 Kilowatt Hour/1100 Kilowatt Flywheel Energy Storage Module CX(s) Applied: B3.6 Date: 08/09/2010 Location(s): Tyngsboro, Massachusetts Office(s): Advanced Research Projects Agency - Energy Funding will support laboratory and bench scale research and development on a flywheel energy storage module that will provide 4 times the stored energy at 118 the cost-per-energy of Beacon's state-of-the-art Gen 4 flywheel. The proposed work is consistent with the goal of Grid-Scale Rampable Intermittently Dispachable Storage (GRIDS): development of new technologies to enable the widespread deployment of cost-effective, grid-scale energy storage. Work consists entirely of research, development,

169

U.S. Department of Energy Categorical Exclusion Determination Form  

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

P P r o m or Field Office: Advanced Research Projects Agency - Energy Proiect Title: (0290-1654) Beacon Power - Development of a 100 k w h 1 100 kW Flywheel Energy Storage Module Location: Massachusetts Proposed Action or Project Description: American Recovery and Reinvestment Act: Fundingwill support laboratory and bench scale researchand development on a flywheel energy storage modulethat will provide4 times the stored energy at 118 the cost-per-energy of Beacon's state-of-the-art Gen4 flywheel. The proposedwork is consistentwith the goal of GRIDS: development of newtechnologies to enable the widespreaddeployment of cost-effective, grid-scale energy storage. Work consists entirely of RD&D to be completed at the Beacon Power facility in Tyngsboro, MA The work performed

170

Energy Sciences Institute Talks at West Campus  

E-Print Network (OSTI)

such as pumped hydroelectric storage, compressed air energy storage (CAES), flywheels, and electrochemical electric storage devices, but viable battery technology able to store large amounts of electric energyEnergy Sciences Institute Talks at West Campus Jaephil Cho Professor at SAMSUNG SDI-UNIST Future

171

Electrochemistry: Metal-free energy storage  

Science Journals Connector (OSTI)

... % of total energy capacity will require electric-energy storage systems to be deployed. For grid-scale applications and remote generation sites, cheap and flexible storage systems are needed, but ... level as a source of potential energy) or expensive (for example, conventional batteries, flywheels and superconductive electromagnetic storage). On page 195 of this issue, Huskinson et al. ...

Grigorii L. Soloveichik

2014-01-08T23:59:59.000Z

172

Mass and nuclear charge yields for 237Np(2nth,f) at different fission fragment kinetic energies  

Science Journals Connector (OSTI)

The recoil mass separator LOHENGRIN of the Laue-Langevin Institute Grenoble has been used to measure for the first time, the yields of light fission fragments from the fissioning system: 23993Np; this odd-Z nucleus is formed after double thermal neutron capture in a 23993Np target. The mass distributions were measured for different kinetic energies between 92 and 115.5 MeV, but the nuclear charge distributions were determined only up to 112 MeV. These distributions are compared to the distributions obtained for the even-even system 24094Pu. At high kinetic energy, the mass distribution shows a prominent peak around mass number AL = 106. These cold fragmentations are discussed in terms of a calculation based on a scission point model extrapolated to the cold fission case. As expected for an odd-Z fissioning nucleus, the nuclear charge distributions do not reveal any odd-even effect. The global neutron odd-even effect is found to be (8.1 ± 1.5)%. A simple model has been used to show that most of the neutron odd-even effect results from prompt neutron evaporation from the fragments.

G. Martinez; G. Barreau; A. Sicre; T.P. Doan; P. Audouard; B. Leroux; W. Arafa; R. Brissot; J.P. Bocquet; H. Faust; P. Koczon; M. Mutterer; F. Gönnenwein; M. Asghar; U. Quade; K. Rudolph; D. Engelhardt; E. Piasecki

1990-01-01T23:59:59.000Z

173

Electron impact ionization of neutral and ionized fullerenes: ionization cross–sections and kinetic energy release  

Science Journals Connector (OSTI)

...and 1000 eV, with an energy spread of approximately...exit electrode by an electric field penetrating from...measurements of appearance energies and ionization cross-sections...measurements have been car- ried out (in both...cross-sections versus electron energy from threshold up to...

1999-01-01T23:59:59.000Z

174

Harvesting Broadband Kinetic Impact Energy from Mechanical Triggering/Vibration and Water Waves  

Science Journals Connector (OSTI)

(13) Although efforts in utilizing ocean wave energy could be dated back to 1890,(13) there has not been any commercial wave power farms up to now. ... This demonstrates that in addition to water wave energy harvesting our TENG also has the potential for hydrological analysis, which is a very important function for a wave energy farming system. ... Last but not least, the major component for ocean wave harvesting is the offshore wind power. ...

Xiaonan Wen; Weiqing Yang; Qingshen Jing; Zhong Lin Wang

2014-06-25T23:59:59.000Z

175

NiTi shape-memory transformations: minimum-energy pathways between austenite, martensites, and kinetically-limited intermediate states  

E-Print Network (OSTI)

NiTi is the most used shape-memory alloy, nonetheless, a lack of understanding remains regarding the associated structures and transitions, including their barriers. Using a generalized solid-state nudge elastic band (GSSNEB) method implemented via density-functional theory, we detail the structural transformations in NiTi relevant to shape memory: those between body-centered orthorhombic (BCO) groundstate and a newly identified stable austenite ("glassy" B2-like) structure, including energy barriers (hysteresis) and intermediate structures (observed as a kinetically limited R-phase), and between martensite variants (BCO orientations). All results are in good agreement with available experiment. We contrast the austenite results to those from the often-assumed, but unstable B2. These high- and low-temperature structures and structural transformations provide much needed atomic-scale detail for transitions responsible for NiTi shape-memory effects.

Zarkevich, N A

2014-01-01T23:59:59.000Z

176

Picosecond Energy Transfer Kinetics between Different Pigment Pools in Chlorosomes from the Green Bacterium Chloroflexus Aurantiacus  

Science Journals Connector (OSTI)

Chloroflexus aurantiacus a thermophilic green bacterium, contains at least four different bacteriochlorophyll ... coupled in a specific way to optimize the energy transfer from the main antenna, ...

Kai Griebenow; Marc G. Müller…

1990-01-01T23:59:59.000Z

177

Technoeconomic analysis of biorefinery based on multistep kinetics and integration of geothermal energy.  

E-Print Network (OSTI)

??In this work, a technoeconomic study is conducted to assess the feasibility of integrating geothermal energy into a biorefinery for biofuel production. The biorefinery is… (more)

Banerjee, Sudhanya

2012-01-01T23:59:59.000Z

178

EA-1631: Final Environmental Assessment | Department of Energy  

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

1: Final Environmental Assessment 1: Final Environmental Assessment EA-1631: Final Environmental Assessment Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, New York The environmental assessment examines the potential environmental impacts associated with issuing a Federal loan guarantee to Beacon Power Corporation for construction and operation of a flywheel-based frequency regulation facility at an undeveloped seven acre site in Stephentown, New York. Environmental Assessment for Department of Energy Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, New York, DOE/EA-1631, February 2009 More Documents & Publications EA-1631: Finding of No Significant Impact Fact Sheet: Grid-Scale Flywheel Energy Storage Plant

179

An ocean kinetic energy converter for low-power applications using piezoelectric disk elements  

Science Journals Connector (OSTI)

The main problem facing long-term electronic system deployments in the sea, is to find a feasible way to supply them with the power they require. Harvesting mechanical energy from the ocean wave oscillations and ...

C. Viñolo; D. Toma; A. Mànuel; J. del Rio

2013-09-01T23:59:59.000Z

180

Multiplication of high-energy electrons in irradiated materials studied using the Boltzmann kinetic equation  

Science Journals Connector (OSTI)

Processes involved in the formation of electron collision cascades created by nonrelativistic high-energy electrons, which can develop in materials exposed to electron and gamma radiation fluxes, ... is solved us...

A. I. Ryazanov; T. I. Mogilyuk…

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Measurement of the Rates of Production and Dissipation of Turbulent Kinetic Energy in an Energetic Tidal Flow: Red Wharf Bay Revisited  

Science Journals Connector (OSTI)

Simultaneous measurements of the rates of turbulent kinetic energy (TKE) dissipation (?) and production (P) have been made over a period of 24 h at a tidally energetic site in the northern Irish Sea in water of 25-m depth. Some ? profiles from ?5 ...

Tom P. Rippeth; John H. Simpson; Eirwen Williams; Mark E. Inall

2003-09-01T23:59:59.000Z

182

2378 J. Phys. Chem. 1990. 94, 2378-2380 Linear Free Energy Relations for MultlelectronTransfer Kinetics: A Brief Look at the  

E-Print Network (OSTI)

Transfer Kinetics: A Brief Look at the Brcansted/Tafel Analogy M. S. Ram and Joseph T . Hupp* Department linear free energy relation (Brmsted plot) for mechanistic purposes is closely analogous to the well-knownTafel these relations take the form of so-called "Tafel plots", i.e., plots of In i (or sometimes In k ) versus

183

In conventional accelerators, energy from RF electro-magnetic waves in vacuum is transformed into kinetic energy  

E-Print Network (OSTI)

In conventional accelerators, energy from RF electro- magnetic waves in vacuum is transformed for accelerating and storing countercirculating beams of 7-TeV protons, has a stored beam energy exceeding 300 MJ. Accelerator-based light sources rely on the fact that when beams of GeV electrons interact with magnetic

Geddes, Cameron Guy Robinson

184

Ranges and kinetic energies of fragments from 14.5-mev neutrons induced fission of ²³?U  

E-Print Network (OSTI)

for two hours were 7. 3 x 10 n/cm -sec and 4. 0 x 10 n/cm ? sec, respectively. 8 2 8 2 Absolute neutron flux can be measured if one deter- mines the absolute activity of copper monitor at the end 0 of irradiation for a known time. The A activity is re...); the semiconductor detector measurement of the energies for the charged-particle-in- duced fission of Ra and Th (5); and time-of-flight measurement of energies and velocities of fragments from U, 2 U and 3 Pu (6). One of the interesting aspects...

Desai, Rajanikant Dattatraya

2012-06-07T23:59:59.000Z

185

TheChandraViewofRadiativeandKineticEnergyDissipationin The X-rayView of Radiative and  

E-Print Network (OSTI)

Energy Dissipation in AGN Dan Evans (MIT Kavli Institute), Herman Marshall (MIT), Stefano Bianchi (Roma Tre), Patrick Ogle (Caltech), James Reeves (Keele) Mike Nowak (MIT), Norbert Schulz (MIT), Anna Lia Effect of AGN? #12;[OIII] arcs [OIII] knots Radio ejecta Chandra 0.3-2 keV 3'' = 1 kpc Bianchi, Evans, et

Evans, Dan

186

Eddy kinetic energy and small-scale sea level height variability  

E-Print Network (OSTI)

the two are obtained for the long- and short-wave (compared to the grid scale) portions of the ocean power is established between the ocean near-surface geostrophic ki- netic energy and the small-scale variance of its an important dynamical attribute of the ocean, is often used to describe its mesoscale variability, or eddy

187

EA-1753: Finding of No Significant Impact | Department of Energy  

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

753: Finding of No Significant Impact 753: Finding of No Significant Impact EA-1753: Finding of No Significant Impact Beacon Power Corporation Flywheel Frequency Regulation Plant, Chicago Heights, Illinois Based on the analyses in the environmental assessment (EA), DOE determined that its proposed action--awarding a federal grand to Beacon Power Corporation (Beacon Power) to facilitate installation and operation of a 20-megawatt flywheel frequency regulation plant--would result in no significant adverse impacts. DOE further determined that the proposed project could result in beneficial impacts o the nation's energy efficiency and air quality. Operating the flywheel plant could result in a decrease in carbon dioxide emissions from regional power plants. In addition, there would be small positive socioeconomic impacts from the expenditures for the

188

EA-1753: Finding of No Significant Impact | Department of Energy  

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

3: Finding of No Significant Impact 3: Finding of No Significant Impact EA-1753: Finding of No Significant Impact Beacon Power Corporation Flywheel Frequency Regulation Plant, Chicago Heights, Illinois Based on the analyses in the environmental assessment (EA), DOE determined that its proposed action--awarding a federal grand to Beacon Power Corporation (Beacon Power) to facilitate installation and operation of a 20-megawatt flywheel frequency regulation plant--would result in no significant adverse impacts. DOE further determined that the proposed project could result in beneficial impacts o the nation's energy efficiency and air quality. Operating the flywheel plant could result in a decrease in carbon dioxide emissions from regional power plants. In addition, there would be small positive socioeconomic impacts from the expenditures for the

189

COMPRESSED-AIR ENERGY STORAGE SYSTEMS FOR STAND-ALONE OFF-GRID PHOTOVOLTAIC MODULES  

E-Print Network (OSTI)

COMPRESSED-AIR ENERGY STORAGE SYSTEMS FOR STAND-ALONE OFF-GRID PHOTOVOLTAIC MODULES Dominique materials, flywheels, pumped hydro (PH), superconducting magnetic energy storage (SMES) and compressed air-grid alternative to the large-scale compressed air energy storage systems we propose to examine the viability

Deymier, Pierre

190

Dual air-gap axial flux permanent magnet machines for flywheel energy storage systems.  

E-Print Network (OSTI)

??More and more renewable distributed generation (DG) connected to the grid has brought about significant impacts on network system security and reliability. The employment of… (more)

Nguyen, Trong Duy.

2012-01-01T23:59:59.000Z

191

A master equation approach to the dynamics of zero electron kinetic energy (ZEKE) states and ZEKE spectroscopy  

SciTech Connect

We have theoretically studied important dynamic processes involved in zero electron kinetic energy (ZEKE) spectroscopy using the density matrix method with the inverse Born-Oppenheimer approximation basis sets. In ZEKE spectroscopy, the ZEKE Rydberg states are populated by laser excitation (either a one- or two-photon process), which is followed by autoionizations and l-mixing due to a stray field. The discrimination field is then applied to ionize loosely bound electrons in the ZEKE states. This is followed by using the extraction field to extract electrons from the ZEKE levels which have a strength comparable to that of the extraction field. These extracted electrons are measured for the relative intensities of the ion states under investigation. The spectral positions are determined by the applied laser wavelength and modified by the extraction electric field. In this paper, all of these processes are conducted within the context of the density matrix method. The density matrix method can provide not only the dynamics of system's population and coherence (or phase) but also the rate constants of the processes involved in the ZEKE spectroscopy. Numerical examples are given to demonstrate the theoretical treatments.

Wang, Yi-Hsieh [Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan (China); Mineo, H.; Chao, S. D. [Institute of Applied Mechanics, National Taiwan University, Taipei 106, Taiwan (China); Selzle, H. L.; Neusser, H. J.; Schlag, E. W. [Institut fuer Physikalische und Theoretische Chemie, Technische Universitaet Muenchen, Lichtenbergstr. 4, D-85748 Garching (Germany); Teranishi, Y. [Institute of Applied Chemistry, Institute of Molecular Science, Chiao-Tung University, Hsin-Chu, Taiwan (China); Lin, S. H. [Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan (China); Institute of Applied Chemistry, Institute of Molecular Science, Chiao-Tung University, Hsin-Chu, Taiwan (China); Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan (China)

2011-02-14T23:59:59.000Z

192

Ion kinetic energy conservation and magnetic field strength constancy in multi-fluid solar wind Alfv\\'enic turbulence  

E-Print Network (OSTI)

We investigate properties of the plasma fluid motion in the large amplitude low frequency fluctuations of highly Alfv\\'enic fast solar wind. We show that protons locally conserve total kinetic energy when observed from an effective frame of reference comoving with the fluctuations. For typical properties of the fast wind, this frame can be reasonably identified by alpha particles, which, owing to their drift with respect to protons at about the Alfv\\'en speed along the magnetic field, do not partake in the fluid low frequency fluctuations. Using their velocity to transform proton velocity into the frame of Alfv\\'enic turbulence, we demonstrate that the resulting plasma motion is characterized by a constant absolute value of the velocity, zero electric fields, and aligned velocity and magnetic field vectors as expected for unidirectional Alfv\\'enic fluctuations in equilibrium. We propose that this constraint, via the correlation between velocity and magnetic field in Alfv\\'enic turbulence, is at the origin of ...

Matteini, L; Pantellini, F; Velli, M; Schwartz, S J

2015-01-01T23:59:59.000Z

193

Mixed Conduction in Rare-Earth Phosphates  

E-Print Network (OSTI)

compressed   air,   flywheels,   biofuels,   hydropower,   and   electrochemical   energy   storage  

Ray, Hannah Leung

2012-01-01T23:59:59.000Z

194

Ionization cross sections of gases for protons at kinetic energies between 20 MeV and 385 GeV, and applications to vacuum gauges in superconducting accelerators  

Science Journals Connector (OSTI)

Measurements have been made of the ionization cross sections of air, hydrogen, and argon by use of the KEK 500-MeV booster, the KEK 12-GeV main ring, and the Fermilab main ring. Within the beam duct of each of those accelerators, we placed a gas ionization monitor and recorded the current in the monitor as a function of the time elapsed since the beam injection for each pulse. This time is uniquely related to the instantaneous kinetic energy of protons. Because gas pressure in the monitor was kept sufficiently low (about 10-5 Torr), the current is attributable to single ionizing collisions of protons with molecules and is therefore proportional to the specific primary ionization, or the ionization cross section (rather than the total ionization). The dependence of the cross section on proton kinetic energy, measured for air, hydrogen, and argon, agrees closely with the prediction of the Bethe theory, and is represented by a straight line on the Fano plot. The data were tested for consistency with other measurements for electrons and protons at lower kinetic energies. Implications of the work for the design of accelerator vacuum components and of particle detectors are included. For instance, the technique used in the present measurements can be readily applied to the determination of the pressure distribution in a beam duct at liquid-helium temperature of an accelerator using superconducting magnets.

Hajime Ishimaru; Shinkichi Shibata; Mitio Inokuti

1995-06-01T23:59:59.000Z

195

Full charge-density scheme with a kinetic-energy correction: Application to ground-state properties of the 4d metals  

Science Journals Connector (OSTI)

We present a full charge-density technique to evaluate total energies from the output of self-consistent linear muffin-tin orbitals (LMTO) calculations in the atomic-sphere approximation (ASA). The Coulomb energy is calculated exactly from the complete, nonspherically symmetric charge density defined within nonoverlapping, space-filling Wigner-Seitz cells; the exchange-correlation energy is evaluated by means of the local-density approximation or the generalized gradient approximation applied to the complete charge-density; and the ASA kinetic energy is corrected for the nonspherically symmetric charge density by a gradient expansion. The technique retains most of the simplicity and the computational efficiency of the LMTO-ASA method, and calculations of atomic volumes and elastic constants of the 4d elements show that it has the accuracy of full-potential methods.

L. Vitos; J. Kollár; H. L. Skriver

1997-05-15T23:59:59.000Z

196

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

197

Energy Storage in Datacenters: What, Where, and How Di Wang, Chuangang Ren, Anand Sivasubramaniam, Bhuvan Urgaonkar, and Hosam Fathy  

E-Print Network (OSTI)

-capacitors, to different kinds of batteries, flywheels and even compressed air-based storage. These ESDs offer veryEnergy Storage in Datacenters: What, Where, and How much? Di Wang, Chuangang Ren, Anand,bhuvan}@cse.psu.edu, hkf2@engr.psu.edu ABSTRACT Energy storage - in the form of UPS units - in a datacenter has been

Urgaonkar, Bhuvan

198

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 &...

199

Energy Storage - More Information | Department of Energy  

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

Energy Storage - More Information Energy Storage - More Information Energy Storage - More Information As energy storage technology may be applied to a number of areas that differ in power and energy requirements, DOE's Energy Storage Program performs research and development on a wide variety of storage technologies. This broad technology base includes batteries (both conventional and advanced), flywheels, electrochemical capacitors, superconducting magnetic energy storage (SMES), power electronics, and control systems. The Energy Storage Program works closely with industry partners, and many of its projects are highly cost-shared. The Program collaborates with utilities and State energy organizations such as the California Energy Commission and New York State Energy Research and Development Authority to field major pioneering storage installations that

200

Kohn-Sham Kinetic Energy Density in the Nuclear and Asymptotic Regions: Deviations from the Von Weizs\\"acker Behavior and Applications to Density Functionals  

E-Print Network (OSTI)

We show that the Kohn-Sham positive-definite kinetic energy (KE) density significantly differs from the von Weizs\\"acker (VW) one at the nuclear cusp as well as in the asymptotic region. At the nuclear cusp, the VW functional is shown to be linear and the contribution of p-type orbitals to the KE density is theoretically derived and numerically demonstrated in the limit of infinite nuclear charge, as well in the semiclassical limit of neutral large atoms. In the latter case, it reaches 12 of the KE density. In the asymptotic region we find new exact constraints for meta Generalized Gradient Approximation (meta-GGA) exchange functionals: with an exchange enhancement factor proportional to $\\sqrt{\\alpha}$, where $\\alpha$ is the common meta-GGA ingredient, both the exchange energy density and the potential are proportional to the exact ones. In addition, this describes exactly the large-gradient limit of quasi-two dimensional systems.

Della Sala, F; Constantin, L A

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Determining the influence of wind-wave breaking on the dissipation of the turbulent kinetic energy in the upper ocean and on the dependence of the turbulent kinetic energy on the stage of wind-wave development  

Science Journals Connector (OSTI)

New experimental data that make it possible to explain and predict the observed variability of turbulent-energy dissipation in the upper ocean are discussed. ... For this purpose, the dependence of the energy dis...

S. A. Kitaigorodskii

2009-06-01T23:59:59.000Z

202

CX-004960: Categorical Exclusion Determination | Department of Energy  

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

4960: Categorical Exclusion Determination 4960: Categorical Exclusion Determination CX-004960: Categorical Exclusion Determination Boeing Research and Technology -Low-Cost, High-Energy Density Flywheel Storage Grid CX(s) Applied: B3.6 Date: 08/13/2010 Location(s): Kent, Washington Office(s): Advanced Research Projects Agency - Energy Funding will support laboratory and bench-scale research and development, and pilot scale testing of a low-cost, flywheel-based energy storage system. The proposed work is consistent with the goal of Grid-Scale Rampable Intermittently Dispachable Storage (GRIDS): development of new technologies to enable the widespread deployment of cost-effective, grid-scale energy storage. Work consists entirely of research, development, and demonstration to be completed at the Boeing Research and Technology

203

Energy Storage  

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

Daniel R. Borneo, PE Daniel R. Borneo, PE Sandia National Laboratories September 27, 2007 San Francisco, CA PEER REVIEW 2007 DOE(SNL)/CEC Energy Storage Program FYO7 Projects Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000. 2 Presentation Outline * DOE(SNL)/CEC Collaboration - Background of DOE(SNL)/CEC Collaboration - FY07 Project Review * Zinc Bromine Battery (ZBB) Demonstration * Palmdale Super capacitor Demonstration * Sacramento Municipal Utility District (SMUD) Regional Transit (RT) Super capacitor demonstration * Beacon Flywheel Energy Storage System (FESS) 3 Background of DOE(SNL)/CEC Collaboration * Memorandum of Understanding Between CEC and DOE (SNL). - In Place since 2004

204

U.S. Department of Energy Categorical Exclusion Determination Form  

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

0290-1757 Boeing Research and Technology - 0290-1757 Boeing Research and Technology - Low-Cost, High-Energy Density Flywheel Storage Grid Location: Washington ProposedAction or Project Description: American Recovery and Reinvestment Act: Funding will support laboratory and bench-scale research and development, and pilot scale testing of a low-cost, flywheel-based energy storage system. The proposed work is consistent with the goal of GRIDS: development of new technologies to enable the widespread deployment of cost- effective, grid-scale energy storage. Work consists entirely of RD&D to be completed at the Boeing Research and Technology development and test facilities in Kent and Seattle, WA. The work performedwill be limited to research, development, pilot scale testing, and evaluation.

205

Energy Storage/Conservation and Carbon Emissions Reduction Demonstration Project  

SciTech Connect

The U.S. Department of Energy (DOE) awarded the Center for Transportation and the Environment (CTE) federal assistance for the management of a project to develop and test a prototype flywheel-­?based energy recovery and storage system in partnership with Test Devices, Inc. (TDI). TDI specializes in the testing of jet engine and power generation turbines, which uses a great deal of electrical power for long periods of time. In fact, in 2007, the company consumed 3,498,500 kW-­?hr of electricity in their operations, which is equivalent to the electricity of 328 households. For this project, CTE and TDI developed and tested a prototype flywheel-­?based energy recovery and storage system. This technology is being developed at TDI’s facilities to capture and reuse the energy necessary for the company’s core process. The new technology and equipment is expected to save approximately 80% of the energy used in the TDI process, reducing total annual consumption of power by approximately 60%, saving approximately two million kilowatt-­?hours annually. Additionally, the energy recycling system will allow TDI and other end users to lower their peak power demand and reduce associated utility demand charges. The use of flywheels in this application is novel and requires significant development work from TDI. Flywheels combine low maintenance costs with very high cycle life with little to no degradation over time, resulting in lifetimes measured in decades. All of these features make flywheels a very attractive option compared to other forms of energy storage, including batteries. Development and deployment of this energy recycling technology will reduce energy consumption during jet engine and stationary turbine development. By reengineering the current inefficient testing process, TDI will reduce risk and time to market of efficiency upgrades of gas turbines across the entire spectrum of applications. Once in place the results from this program will also help other US industries to utilize energy recycling technology to lower domestic energy use and see higher net energy efficiency. The prototype system and results will be used to seek additional resources to carry out full deployment of a system. Ultimately, this innovative technology is expected to be transferable to other testing applications involving energy-­?based cycling within the company as well as throughout the industry.

Bigelow, Erik

2012-10-30T23:59:59.000Z

206

Energy Storage Systems Program at Sandia National Laboratories  

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

at Sandia National Laboratories at Sandia National Laboratories John D. Boyes Nov. 2, 2010 Sandia National Laboratories is a multiprogram Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000. FY10 SNL ESS Program FY10 Budget ~$11 M * System and Prototype Development - HYBSIM model development - Boeing Superconducting Flywheel - ABMASS Hybrid Controller - Iowa Stored Energy Project - CEC Support - NYSERDA Support Molecules to Megawatts * Applied Research increased to $2.3 M - Develop Ionic Liquid Electrolytes for Flow Batteries - N2-O2 Battery Feasibility - CRADA formed with East Penn Manufacturing Co. to study carbon additions to plate structure of lead acid battery - Advanced Flywheel Materials *

207

Low energy ion-molecule reaction dynamics and chemiionization kinetics. Progress report, February 1, 1980-January 31, 1981  

SciTech Connect

Reactive scattering studies were completed over a wide energy range on the systems H/sub 2//sup +/ + Ar, H/sub 2//sup +/ + H/sub 2/O, H/sub 2//sup +/ + D/sub 2/O, and H/sub 2//sup +/ + Ne. Work was begun on the proton transfer system HCO/sup +/ + H/sub 2/O ..-->.. H/sub 3/O/sup +/ + CO.

Farrar, J.M.

1981-01-01T23:59:59.000Z

208

DOE Global Energy Storage Database  

DOE Data Explorer (OSTI)

The DOE International Energy Storage Database has more than 400 documented energy storage projects from 34 countries around the world. The database provides free, up-to-date information on grid-connected energy storage projects and relevant state and federal policies. More than 50 energy storage technologies are represented worldwide, including multiple battery technologies, compressed air energy storage, flywheels, gravel energy storage, hydrogen energy storage, pumped hydroelectric, superconducting magnetic energy storage, and thermal energy storage. The policy section of the database shows 18 federal and state policies addressing grid-connected energy storage, from rules and regulations to tariffs and other financial incentives. It is funded through DOE’s Sandia National Laboratories, and has been operating since January 2012.

209

Energy Storage Systems 2012 Peer Review Presentations - Day 2, Session 2 |  

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

2 2 Energy Storage Systems 2012 Peer Review Presentations - Day 2, Session 2 The U.S. DOE Energy Storage Systems Program (ESS) conducted a peer review and update meeting in Washington, DC on Sept. 26 - 28, 2012. The 3-day conference included 9 sessions plus two poster sessions. Presentations from the second session of Day 2, chaired by Sandia's Ross Guttromson, are below. ESS 2012 Peer Review - Na-ion Intercalation Electrodes for Na-ion Battery - Jun Liu, PNNL ESS 2012 Peer Review - Unique Li-ion Batteries for Utility Applications - Daiwon Choi, PNNL ESS 2012 Peer Review - Carbon Enhanced VRLA Batteries - David Enos, SNL ESS 2012 Peer Review - Improved Properties of Nanocomposites for Flywheel Applications - Tim Boyle, SNL ESS 2012 Peer Review - Magnetic Composites for Flywheel Energy Storage -

210

ESS 2012 Peer Review - NYSERDA Energy Storage Projects - Dhruv Bhatnagar, SNL  

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

NYSERDA Energy Storage Projects NYSERDA Energy Storage Projects Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND No. 2011-XXXXP NaS Battery at MTA Long Island Bus Depot Beacon Flywheel Plant at Stephentown, NY 4 Demonstration Project Sites 1) Beacon Flywheel Plant at Stephentown, NY * Ancillary services in NYISO 2) NaS Battery at MTA Long Island Bus Depot * Time of day load shifting to avoid TOU rates 3) Flow Battery at Niagara Falls State Park * Renewables integration/firming &

211

Energy Storage Systems 2012 Peer Review Presentations - Day 2, Session 2 |  

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

2, 2, Session 2 Energy Storage Systems 2012 Peer Review Presentations - Day 2, Session 2 The U.S. DOE Energy Storage Systems Program (ESS) conducted a peer review and update meeting in Washington, DC on Sept. 26 - 28, 2012. The 3-day conference included 9 sessions plus two poster sessions. Presentations from the second session of Day 2, chaired by Sandia's Ross Guttromson, are below. ESS 2012 Peer Review - Na-ion Intercalation Electrodes for Na-ion Battery - Jun Liu, PNNL ESS 2012 Peer Review - Unique Li-ion Batteries for Utility Applications - Daiwon Choi, PNNL ESS 2012 Peer Review - Carbon Enhanced VRLA Batteries - David Enos, SNL ESS 2012 Peer Review - Improved Properties of Nanocomposites for Flywheel Applications - Tim Boyle, SNL ESS 2012 Peer Review - Magnetic Composites for Flywheel Energy Storage -

212

Optimal Energy Systems | Open Energy Information  

Open Energy Info (EERE)

Optimal Energy Systems Optimal Energy Systems Jump to: navigation, search Name Optimal Energy Systems Place Torrance, California Zip 90505 Product Manufacturer of flywheel power system, specialising in aerospace and defence sector. Coordinates 40.417285°, -79.223959° 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":40.417285,"lon":-79.223959,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

213

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

214

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

215

Techno-economic evaluation of hybrid energy storage technologies for a solar–wind generation system  

Science Journals Connector (OSTI)

Huazhong University of Science and Technology is planning to establish a hybrid solar–wind generation dynamic simulation laboratory. Energy storage technologies will be vital to this system for load leveling, power quality control and stable output. In this paper, the technical feasibility of energy storage technologies for renewable intermittent sources like wind and solar generation is analyzed. Furthermore, the different combination modes of energy storage technologies are proposed. The involved energy storage technologies include superconducting magnetic energy storage systems (SMESs), flywheels (FWs), electrochemical super-capacitors (SCs) and redox flow batteries (RFBs). Based on that, the economic analysis of hybrid energy storage technologies is conducted.

L. Ren; Y. Tang; J. Shi; J. Dou; S. Zhou; T. Jin

2013-01-01T23:59:59.000Z

216

E-Print Network 3.0 - atomistic kinetic monte Sample Search Results  

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

Materials Science ; Physics 5 Mesoscopic model for dynamic simulations of carbon nanotubes Leonid V. Zhigilei* Summary: of the potential energy and kinetic energy of a 395...

217

Kinetic Energy LLC | Open Energy Information  

Open Energy Info (EERE)

Id 56210 Utility Location Yes Ownership R NERC ERCOT Yes ISO Ercot Yes Activity Retail Marketing Yes This article is a stub. You can help OpenEI by expanding it. Utility...

218

Physics 321 Energy Conservation Potential Energy in  

E-Print Network (OSTI)

Physics 321 Hour 7 Energy Conservation ­ Potential Energy in One Dimension Work-Energy Theorem = 1 work increases kinetic energy, negative work decreases kinetic energy Gravity Depending on initial is independent of path. If we know we also know . 1 2 y x Potential Energy If T is dependent only on the end

Hart, Gus

219

Washington | Department of Energy  

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

16, 2010 16, 2010 CX-003457: Categorical Exclusion Determination Sidewall Coring of Single-Shell Tank 241-A-106 CX(s) Applied: A9, B3.1, B3.11 Date: 08/16/2010 Location(s): Richland, Washington Office(s): Environmental Management, Office of River Protection-Richland Office August 13, 2010 CX-004960: Categorical Exclusion Determination Boeing Research and Technology -Low-Cost, High-Energy Density Flywheel Storage Grid CX(s) Applied: B3.6 Date: 08/13/2010 Location(s): Kent, Washington Office(s): Advanced Research Projects Agency - Energy August 12, 2010 CX-003624: Categorical Exclusion Determination Replacement of Twenty 22-L Structures on the Satsop-Aberdeen Number 2 230-kilovolt Transmission Line CX(s) Applied: B1.3 Date: 08/12/2010 Location(s): Gray's Harbor County, Washington

220

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

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

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.

222

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

223

Is It Time to Shoot for the Sun?  

Science Journals Connector (OSTI)

...Solar energy advocates acknowledge that a global solar energy grid would face plenty of other challenges as well. Chief among...electrochemical energy of a battery or the kinetic energy of a flywheel. The massive scale of global electric use makes both of those...

Robert F. Service

2005-07-22T23:59:59.000Z

224

Economics of electric energy storage for energy arbitrage and regulation in New York  

Science Journals Connector (OSTI)

Unlike markets for storable commodities, electricity markets depend on the real-time balance of supply and demand. Although much of the present-day grid operates effectively without storage, cost-effective ways of storing electrical energy can help make the grid more efficient and reliable. We investigate the economics of two emerging electric energy storage (EES) technologies: sodium sulfur batteries and flywheel energy storage systems in New York state's electricity market. The analysis indicates that there is a strong economic case for EES installations in the New York City region for applications such as energy arbitrage, and that significant opportunities exist throughout New York state for regulation services. Benefits from deferral of system upgrades may be important in the decision to deploy EES. Market barriers currently make it difficult for energy-limited EES such as flywheels to receive revenue for voltage regulation. Charging efficiency is more important to the economics of EES in a competitive electricity market than has generally been recognized.

Rahul Walawalkar; Jay Apt; Rick Mancini

2007-01-01T23:59:59.000Z

225

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

226

Page not found | Department of Energy  

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

11 - 1320 of 28,905 results. 11 - 1320 of 28,905 results. Download CX-004504: Categorical Exclusion Determination Beacon Power 20 Megawatt Flywheel Frequency Regulation Plant CX(s) Applied: A1, A9, A11 Date: 11/19/2010 Location(s): Tyngsboro, Massachusetts Office(s): Electricity Delivery and Energy Reliability, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-004504-categorical-exclusion-determination Download CX-004473: Categorical Exclusion Determination Deepwater Subsea Test Tree and Intervention Riser System CX(s) Applied: A9, A11 Date: 11/18/2010 Location(s): Houston, Texas Office(s): Fossil Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-004473-categorical-exclusion-determination Download CX-004474: Categorical Exclusion Determination

227

Microsoft Word - OE_Energy_Storage_Program_Plan_Feburary_2011v3[2].docx  

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

Images-Front cover: 20MW Beacon Power flywheel storage facility; Ameren's 440MW pumped-hydro storage at Taum Sauk, Missouri. Back cover: 8MW SCE / A123 Lithium-ion storage at Tehachapi wind farm; 25MW Primus Power flow battery at Modesto, California; 110MW compressed air energy storage in McIntosh, Alabama. TABLE OF CONTENTS Executive Summary............................................................................................................. 1 1.0 Introduction to the OE Storage Program ...................................................................... 5 1.1. The Grid Energy Storage Value Proposition ..................................................................................... 5 1.2. Grid Energy Storage at DOE .............................................................................................................

228

Effect of adaptation to high light intensity on the kinetics of energy transfer from phycobilisomes to photosystem II in Anabaena cylindrica  

Science Journals Connector (OSTI)

Transfer efficiencies between phycobilisomes and photosystem II antenna chlorophylls were determined on membrane fragments isolated from low and high light adapted Anabaena cells. The observed increase in energy ...

E. Kaiseva; L. Zimányi; I. Laczkó

1988-12-01T23:59:59.000Z

229

Study of the ArBr-, AC, and Krl-anions and the corresponding neutral van der Waals complexes by anion zero electron kinetic energy  

E-Print Network (OSTI)

rotational transitions. From our data, we construct the potential energy curve for each neutral state as well energy functions between open and closed shell species or between neutrals and ions are gener- ally muchStudy of the ArBr-, AC, and Krl- anions and the corresponding neutral van der Waals complexes

Neumark, Daniel M.

230

Fully kinetic simulations of megajoule-scale dense plasma focus  

Science Journals Connector (OSTI)

Dense plasma focus (DPF) Z-pinch devices are sources of copious high energy electrons and ions x-rays and neutrons. Megajoule-scale DPFs can generate 1012 neutrons per pulse in deuterium gas through a combination of thermonuclear and beam-target fusion. However the details of the neutron production are not fully understood and past optimization efforts of these devices have been largely empirical. Previously we reported on the first fully kinetic simulations of a kilojoule-scale DPF and demonstrated that both kinetic ions and kinetic electrons are needed to reproduce experimentally observed features such as charged-particle beam formation and anomalous resistivity. Here we present the first fully kinetic simulation of a MegaJoule DPF with predicted ion and neutron spectra neutron anisotropy neutron spot size and time history of neutron production. The total yield predicted by the simulation is in agreement with measured values validating the kinetic model in a second energy regime.

M. May

2014-01-01T23:59:59.000Z

231

Page not found | Department of Energy  

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

51 - 25260 of 29,416 results. 51 - 25260 of 29,416 results. Article 25 Cities Meet to Discuss How to Eliminate Barriers and Bring More Solar to Market Representatives from 25 cities meet to discuss how to reduce local red tape, like zoning, financing and unwieldy permitting processes, that drives up the cost of solar. http://energy.gov/articles/25-cities-meet-discuss-how-eliminate-barriers-and-bring-more-solar-market Article Energy Innovations from Livermore Lab to Power Hawaiian Nonprofit LLNL's pilot electromechanical battery/flywheel and electrostatic (ES) generator/motor technologies will reduce the plant's electrical bills by 50 percent and provide sustainable and energy efficient solutions for the nonprofit. http://energy.gov/articles/energy-innovations-livermore-lab-power-hawaiian-nonprofit

232

r- and p-space electron densities and related kinetic and exchange energies in terms of s states alone for the leading term in the 1/Z expansion for nonrelativistic closed-shell atomic ions  

Science Journals Connector (OSTI)

As a step towards constructing nonlocal energy density functionals, the leading term in the so-called 1/Z expansion for closed-shell atomic ions is the focus here. This term is characterized by the properties of the bare Coulomb potential (-Ze2/r), and for an arbitrary number of closed shells it is known that ??(r)/?r=-(2Z/a0)?s(r), where ?(r) is the ground-state electron density while ?s(r) is the s-state (l=0) contribution to ?(r). Here, the kinetic-energy density t(r) is also derived as a double integral in terms of ?s(r) and Z. Although the exchange energy density ?x(r) is more complex than t(r), a proof is given that, in the Coulomb limit system, ?x is indeed also determined by s-state properties alone. The same is shown to be true for the momentum density n(p), which here is obtained explicitly for an arbitrary number of closed shells. Finally, numerical results are presented that include (a) ten-electron atomic ions (K+L shells), (b) the limit as the number of closed shells tends to infinity, where an appeal is made to the analytical r-space study of Heilmann and Lieb [Phys. Rev. A 52, 3628 (1995)], and (c) momentum density and Compton line shape for an arbitrary number of closed shells.

I. A. Howard; N. H. March; V. E. Van Doren

2001-05-04T23:59:59.000Z

233

Study of the kinetics of the gas-phase, iodine catalyzed elimination of HBr from isobutylbromide: the tertiary C-H bond dissociation energy in isobutylbromide.  

E-Print Network (OSTI)

, (with the possible exception of the very electronegative F atom) unless the substituent can delocalize the odd electron such as with the vinyI substituent, i. e. the allyl radical. The stabi'Iization energy is defined as the difference between... of formation of the radical. f s indicated in section (II); the stabilization energy of bromine bridged radical by the delocalization of tne odd electron can be obtained by comparisior, with a localized free radical. Thus, the stabi11zat1on energy...

Jirustithipong, Pongsiri

2012-06-07T23:59:59.000Z

234

Pontificia Universidad Catlica de Chile Escuela de Ingeniera  

E-Print Network (OSTI)

) Electric Compressed Air Energy Storage (CAES) Potential/Enthalpy 15.000 in kJ/m3 Electric Flywheels Kinetic-600 Li-polymer ~ 1.400 Transport, Buildings Superconducting Magnetic Energy Storage (SMES (e.g. Hidroelectricidad Bombeada, Almacenamiento de Energía con Aire Comprimido, Volantes de Inercia

Rudnick, Hugh

235

New Reports and Other Materials | Department of Energy  

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

New Reports and Other Materials New Reports and Other Materials New Reports and Other Materials Recently released reports, presentations, and other materials are available for download below. Energy Emergency Preparedness Quarterly Vol 1 Issue 4 - October 2012 October 2012 Energy Assurance Planning Bulletin Volume 3 No 4 Fact Sheet: Wind Firming EnergyFarm (October 2012) Fact Sheet: Tehachapi Wind Energy Storage Project (October 2012) Fact Sheet: Sodium-Ion Batteries for Grid-Level Applications (October 2012) Fact Sheet: Isothermal Compressed Air Energy Storage (October 2012) Fact Sheet: Grid-Scale Flywheel Energy Storage Plant (October 2012) Fact Sheet: Grid-Scale Energy Storage Demonstration Using UltraBattery Technology (October 2012) Fact Sheet: Community Energy Storage for Grid Support (October 2012)

236

Fact Sheet: Energy Storage Technology Advancement Partnership (October 2012)  

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

Clean Energy States Alliance Clean Energy States Alliance Batteries, flywheels, above-ground compressed air, micro pumped hydro, and other forms of energy storage may be able to provide significant support to the integration of renewable energy in the United States. Public funding and support are critical to accelerate progress, achieve cost reductions, and encourage widespread deployment of these technologies. Overview The Energy Storage Technology Advancement Partnership (ESTAP) is a new, cooperative funding and information-sharing partnership between the U.S. Department of Energy (DOE) and interested states that aims to accelerate the commercialization and deployment of energy storage technologies in the United States via joint funding and coordination. Facilitated by the Clean Energy States Alliance, ESTAP is funded by Sandia National

237

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:...

238

Kinetics of Silica Polymerization  

E-Print Network (OSTI)

G. E Tardiff, "The LLL Geothermal Energy Program St s Reportmal Effluent Inj ection", Geothermal Energy Novelty Becomesfor Injection", Geothermal Energy Novelty Becomes Resource:

Weres, Oleh

2011-01-01T23:59:59.000Z

239

Kinetics of Silica Polymerization  

E-Print Network (OSTI)

mal Effluent Inj ection", Geothermal Energy Novelty Becomesfor Injection", Geothermal Energy Novelty Becomes Resource:G. E Tardiff, "The LLL Geothermal Energy Program St s Report

Weres, Oleh

2011-01-01T23:59:59.000Z

240

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

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

A high-intensity, pulsed supersonii:, carbon source aivith C("Pi> kinetic energies of 0.08-0.7 eV for crossed beam experiments  

E-Print Network (OSTI)

. INTRODUCTION Chemical reactions of ground state atomic carbon C(3Pj) play a major role in combustion processes,`-3 hydrocarbon syntheses,lm3 and interstellar chemistry."-* However, pre- dominantly energy sources.2*14**5 Heating of (1) and (2) releases nitrogen, hydrogen chloride, and atomic carbon (1

Kaiser, Ralf I.

242

DOI: 10.1002/ejic.200600960 Synthesis and Sublimation Kinetics of a Highly Volatile Asymmetric Iron(II)  

E-Print Network (OSTI)

FULL PAPER DOI: 10.1002/ejic.200600960 Synthesis and Sublimation Kinetics of a Highly Volatile: Asymmetric iron(II) amidinate / Bridging ligands / Metathesis / Sublimation kinetics / Thermochemistry properties have been the subject of intense investigations in chemistry, electronics, optics, energy

243

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

244

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 &...

245

Page not found | Department of Energy  

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

41 - 14950 of 26,764 results. 41 - 14950 of 26,764 results. Download EA-1753: Finding of No Significant Impact Beacon Power Corporation Flywheel Frequency Regulation Plant, Chicago Heights, Illinois http://energy.gov/nepa/downloads/ea-1753-finding-no-significant-impact Download Software Risk Management A Practical Guide http://energy.gov/cio/downloads/software-risk-management-practical-guide Download Independent Oversight Inspection, Sandia National Laboratories- July 2006 Emergency Management Inspection of the Sandia National Laboratories http://energy.gov/hss/downloads/independent-oversight-inspection-sandia-national-laboratories-july Download EA-1157: Final Environmental Assessment Methyl Chloride via Oxyhydrochlorination of Methane: A Building Black for Chemicals and Fuels from Natural Gas

246

Page not found | Department of Energy  

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

71 - 3780 of 28,905 results. 71 - 3780 of 28,905 results. Download EIS-0440: DOE and EPA Notice of Availability of a Draft Environmental Impact Statement Quartzsite Solar Energy Project and Proposed Yuma Field Office Resource Management Plan Amendment, La Paz County, Arizona (November 2011) http://energy.gov/nepa/downloads/eis-0440-doe-and-epa-notice-availability-draft-environmental-impact-statement Download EA-1753: Finding of No Significant Impact Beacon Power Corporation Flywheel Frequency Regulation Plant, Chicago Heights, Illinois http://energy.gov/nepa/downloads/ea-1753-finding-no-significant-impact Article T-622: Adobe Acrobat and Reader Unspecified Memory Corruption Vulnerability The vulnerability is due to an unspecified error in the affected software when it processes .pdf files. An unauthenticated, remote attacker could

247

FY06 DOE Energy Storage Program PEER Review  

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

7 DOE Energy Storage Program 7 DOE Energy Storage Program PEER Review FY07 DOE Energy Storage Program PEER Review John D. Boyes Sandia National Laboratories Mission Mission Develop advanced electricity storage and PE technologies, in partnership with industry, for modernizing and expanding the electric supply. This will improve the quality, reliability, flexibility and cost effectiveness of the existing system. Help create an energy storage industry Make energy storage ubiquitous ESS Program Makeup ESS Program Makeup ESS Base Program - CEC/DOE Data Acquisition and Project Support - NYSERDA/DOE Data Acquisition and Project Support - BPA ETO based STATCOM Project - ETO Development Project - Boeing Superconducting Flywheel - ACONF Coast Guard Project - Iowa Stored Energy Project - Electrolyte Research

248

Education Toolbox Search | Department of Energy  

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

energy.goveerevideosenergy-101-wind-turbines-2014-update Video Energy 101: Hydroelectric Power Learn how hydropower captures the kinetic energy of flowing water and turns...

249

Accurate calculations of neutron kerma (Kinetic Energy Released in MAterials) and damage from ENDF/B-VI evaluations for silicon, chromium, iron and nickel, and comparison with ENDF/B-V results  

SciTech Connect

Accurate calculations of kerma (Kinetic Energy Released in MAterials) factors and displacement cross sections are fundamental to studies of neutron heating and neutron radiation damage. Damage and heating studies are important elements in both fission and fusion reactor design. For fusion reactor studies, heating in the blanket helps determine the efficiency, and heating studies in the superconducting magnet regions determine properties of the blanket and shield, thereby affecting the economics of the reactor. Radiation damage is important for reactor core lifetime studies and is related directly to the economy and safety of both fusion and fission reactors. Calculation of kerma factors and displacement cross sections require nuclear data for neutron-induced reactions. These data are normally obtained from evaluated nuclear data libraries, such as ENDF/B (US), JENDL (Japan), JEF/EFF (Europe) and BROND (USSR). Unfortunately, most of these evaluated libraries do not contain sufficient information for a direct calculation of these quantities, and various approximations must be employed. The accuracy of the kerma factors and displacement cross sections, and thus the heating and damage functions, are directly related to the available information from the data libraries. In this paper we describe improvements incorporated in the latest version of the US library, ENDF/B-VI, which allow exact calculations of these quantities for many of the structural materials included in the library. 11 refs., 6 figs.

Larson, D.C.; Hetrick, D.M.; Fu, C.Y.; Epperson, S.J. (Oak Ridge National Lab., TN (USA)); MacFarlane, R.E. (Los Alamos National Lab., NM (USA))

1990-01-01T23:59:59.000Z

250

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES  

E-Print Network (OSTI)

We present measurements of exclusive \\pi^{+,0} and \\eta\\ production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of \\pi^+ and \\pi^0, high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of \\Delta(1232) and higher lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross sections are of special interest in the case of pp \\to pp \\eta, since controversial data exist at 2.0 GeV; we find \\sigma =0.142 \\pm 0.022 mb. Using the dielectron channels, the \\pi^0 and \\eta\\ Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance corrected helicity angle distributions are found in good agreement with model predictions.

Agakishiev, G; Balanda, A; Bassini, R; Böhmer, M; Boyard, J L; Cabanelas, P; Chernenko, S; Christ, T; Destefanis, M; Dohrmann, F; Dybczak, A; Eberl, T; Fabbietti, L; Fateev, O; Finocchiaro, P; Friese, J; Fröhlich, I; Galatyuk, T; Garzón, J A; Gernhäuser, R; Gilardi, C; Golubeva, M; González-Díaz, D; Guber, F; Gumberidze, M; Hennino, T; Holzmann, R; Iori, I; Ierusalimov, A; Ivashkin, A; Jurkovic, M; Kämpfer, B; Kanaki, K; Karavicheva, T; Koenig, I; Koenig, W; Kolb, B W; Kotte, R; Kozuch, A; Krizek, F; Kühn, W; Kugler, A; Kurepin, A; Lang, S; Lapidus, K; Liu, T; Maier, L; Markert, J; Metag, V; Michalska, B; Morinière, E; Mousa, J; Müntz, C; Naumann, L; Otwinowski, J; Pachmayer, Y C; Pechenov, V; Pechenova, O; Pietraszko, J; Przygoda, W; Ramstein, B; Reshetin, A; Roy-Stephan, M; Rustamov, A; Sadovsky, A; Sailer, B; Salabura, P; Sánchez, M; Schmah, A; Schwab, E; Sobolev, Yu G; Spataro, S; Spruck, B; Ströbele, H; Stroth, J; Sturm, C; Tarantola, A; Teilab, K; Tlusty, P; Toia, A; Traxler, M; Trebacz, R; Tsertos, H; Wagner, V; Wisniowski, M; Wüstenfeld, J; Yurevich, S; Zanevsky, Y

2012-01-01T23:59:59.000Z

251

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES  

E-Print Network (OSTI)

We present measurements of exclusive \\pi^{+,0} and \\eta\\ production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of \\pi^+ and \\pi^0, high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of \\Delta(1232) and higher lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross sections are of special interest in the case of pp \\to pp \\eta, since controversial data exist at 2.0 GeV; we find \\sigma =0.142 \\pm 0.022 mb. Using the dielectron channels, the \\pi^0 and \\eta\\ Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance corrected helicity angle distributions are found in good agreement with model predictions.

HADES Collaboration; G. Agakishiev; H. Alvarez-Pol; A. Balanda; R. Bassini; M. Böhmer; H. Bokemeyer; J. L. Boyard; P. Cabanelas; S. Chernenko; T. Christ; M. Destefanis; F. Dohrmann; A. Dybczak; T. Eberl; L. Fabbietti; O. Fateev; P. Finocchiaro; J. Friese; I. Fröhlich; T. Galatyuk; J. A. Garzón; R. Gernhäuser; C. Gilardi; M. Golubeva; D. González-Díaz; F. Guber; M. Gumberidze; T. Hennino; R. Holzmann; A. Ierusalimov; I. Iori; A. Ivashkin; M. Jurkovic; B. Kämpfer; K. Kanaki; T. Karavicheva; I. Koenig; W. Koenig; B. W. Kolb; R. Kotte; A. Kozuch; F. Krizek; W. Kühn; A. Kugler; A. Kurepin; S. Lang; K. Lapidus; T. Liu; L. Maier; J. Markert; V. Metag; B. Michalska; E. Morinière; J. Mousa; M. Münch; C. Müntz; L. Naumann; J. Otwinowski; Y. C. Pachmayer; V. Pechenov; O. Pechenova; T. Pérez Cavalcanti; J. Pietraszko; V. Pospísil; W. Przygoda; B. Ramstein; A. Reshetin; M. Roy-Stephan; A. Rustamov; A. Sadovsky; B. Sailer; P. Salabura; M. Sánchez; A. Schmah; E. Schwab; Yu. G. Sobolev; S. Spataro; B. Spruck; H. Ströbele; J. Stroth; C. Sturm; A. Tarantola; K. Teilab; P. Tlusty; A. Toia; M. Traxler; R. Trebacz; H. Tsertos; V. Wagner; M. Wisniowski; T. Wojcik; J. Wüstenfeld; S. Yurevich; Y. Zanevsky; P. Zumbruch

2012-04-23T23:59:59.000Z

252

The Wide-area Energy Management System Phase 2 Final Report  

SciTech Connect

The higher penetration of intermittent generation resources (including wind and solar generation) in the Bonneville Power Administration (BPA) and California Independent System Operator (CAISO) balancing authorities (BAs) raises issue of requiring expensive additional fast grid balancing services in response to additional intermittency and fast up and down power ramps in the electric supply system. The overall goal of the wide-area energy management system (WAEMS) project is to develop the principles, algorithms, market integration rules, a functional design, and a technical specification for an energy storage system to help cope with unexpected rapid changes in renewable generation power output. The resulting system will store excess energy, control dispatchable load and distributed generation, and utilize inter-area exchange of the excess energy between the California ISO and Bonneville Power Administration control areas. A further goal is to provide a cost-benefit analysis and develop a business model for an investment-based practical deployment of such a system. There are two tasks in Phase 2 of the WAEMS project: the flywheel field tests and the battery evaluation. Two final reports, the Wide-area Energy Management System Phase 2 Flywheel Field Tests Final Report and the Wide-area Energy Storage and Management System Battery Storage Evaluation, were written to summarize the results of the two tasks.

Lu, Ning; Makarov, Yuri V.; Weimar, Mark R.

2010-08-31T23:59:59.000Z

253

Locomotion: Dealing with friction  

Science Journals Connector (OSTI)

...recover and reuse the kinetic energy, as can be done with flywheels in principle, or as sometimes done on electric vehicles...it fortuitous, of this particular aircraft, he called the Boeing 747 the commuter train of the global village and noted that...

V. Radhakrishnan

1998-01-01T23:59:59.000Z

254

Kinetic modeling of the Townsend breakdown in argon  

SciTech Connect

Kinetic modeling of the Townsend breakdown in argon was performed in the “forward-back” approximation. The kinetic model was found to adequately describe the left branch of the Paschen curve, and the important role of ionization by fast ions and atoms near the cathode, as well as the increase in secondary emission coefficient in strong electric fields described in the literature, was confirmed. The modeling also showed that the electron energy distribution function develops a beam of high-energy electrons and that the runaway effect, i.e., the monotonic increase of the mean electron energy with the distance from the cathode, occurs at the left branch of the Paschen curve.

Macheret, S. O.; Shneider, M. N. [Department of Mechanical and Aerospace Engineering, Princeton University, D-414 Engineering Quadrangle, Princeton, New Jersey 08544 (United States)] [Department of Mechanical and Aerospace Engineering, Princeton University, D-414 Engineering Quadrangle, Princeton, New Jersey 08544 (United States)

2013-10-15T23:59:59.000Z

255

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

256

Energy Storage Systems 2012 Peer Review Presentations - Poster Session 1  

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

Energy Storage Systems 2012 Peer Review Presentations - Poster Energy Storage Systems 2012 Peer Review Presentations - Poster Session 1 (Day 1): ARPA-E Projects Energy Storage Systems 2012 Peer Review Presentations - Poster Session 1 (Day 1): ARPA-E Projects The U.S. DOE Energy Storage Systems Program (ESS) conducted a peer review and update meeting in Washington, DC on Sept. 26 - 28, 2012. The 3-day conference included 9 sessions plus two poster sessions. ARPA-E project presentations from the first poster session on Day 1, chaired by DOE's Mark Johnson, are below. ESS 2012 Peer Review - Dispatchable Wind--Wind Power on Demand - Ian Lawson, General Compression ESS 2012 Peer Review - Novel Regenerative Fuel Cells based on Anion Exchange Membranes - Katherine Ayers, Proton Onsite ESS 2012 Peer Review - Low Cost, High-Energy Density Flywheel Storage Grid

257

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

258

Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2  

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

2 (Day 2): ARRA Projects 2 (Day 2): ARRA Projects Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2 (Day 2): ARRA Projects The U.S. DOE Energy Storage Systems Program (ESS) conducted a peer review and update meeting in Washington, DC on Sept. 26 - 28, 2012. The 3-day conference included 9 sessions plus two poster sessions. ARRA project presentations from the second poster session on Day 2, chaired by Sandia's Georgianne Huff, are below. ESS 2012 Peer Review - 20 MW Flywheel Frequency Regulation Plant - Jim Arseneaux, Beacon Power ESS 2012 Peer Review - Advanced Implementation of Community ESS for Grid Support - Haukur Asgeirsson, Detroit Edison ESS 2012 Peer Review - Notrees Wind Storage - Jeff Gates, Duke Energy ESS 2012 Peer Review - Compressed Air Energy Storage - Robert Booth,

259

Energy Storage Systems 2006 Peer Review - Day 1 morning presentations |  

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

1 morning 1 morning presentations Energy Storage Systems 2006 Peer Review - Day 1 morning presentations The 2006 Peer Review Meeting for the DOE Energy Storage Systems (ESS) Program was held in Washington DC on November 2-3, 2006. Current and completed program projects were presented and reviewed by a group of industry professionals. Presentations from the Day 1 morning session are below. ESS 2006 Peer Review - NAS Battery Performance at Charleston, WV - Ali Nourai, AEP.pdf ESS 2006 Peer Review - Evaluation of the Kauai Island Utility Cooperative System for Energy Storage Potential - Abbas Akhil, SNL.pdf ESS 2006 Peer Review - Iowa Stored Energy Plant - Bob Haug, ISEPA.pdf ESS 2006 Peer Review - Superconducting Flywheel Development - Phil Johnson, Boeing.pdf ESS 2006 Peer Review - Bipolar NiMH Battery Development and Testing - James

260

Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2  

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

2 (Day 2): ARRA Projects 2 (Day 2): ARRA Projects Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2 (Day 2): ARRA Projects The U.S. DOE Energy Storage Systems Program (ESS) conducted a peer review and update meeting in Washington, DC on Sept. 26 - 28, 2012. The 3-day conference included 9 sessions plus two poster sessions. ARRA project presentations from the second poster session on Day 2, chaired by Sandia's Georgianne Huff, are below. ESS 2012 Peer Review - 20 MW Flywheel Frequency Regulation Plant - Jim Arseneaux, Beacon Power ESS 2012 Peer Review - Advanced Implementation of Community ESS for Grid Support - Haukur Asgeirsson, Detroit Edison ESS 2012 Peer Review - Notrees Wind Storage - Jeff Gates, Duke Energy ESS 2012 Peer Review - Compressed Air Energy Storage - Robert Booth,

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Kinetic Wave Power | Open Energy Information  

Open Energy Info (EERE)

Wave Power Address: 2861 N Tupelo St Place: Midland Zip: 48642 Region: United States Sector: Marine and Hydrokinetic Phone Number: 989-839-9757 Website: http:...

262

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...

263

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...

264

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...

265

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...

266

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...

267

Vlasov simulations of Kinetic Alfv\\'en Waves at proton kinetic scales  

E-Print Network (OSTI)

Kinetic Alfv\\'en waves represent an important subject in space plasma physics, since they are thought to play a crucial role in the development of the turbulent energy cascade in the solar wind plasma at short wavelengths (of the order of the proton inertial length $d_p$ and beyond). A full understanding of the physical mechanisms which govern the kinetic plasma dynamics at these scales can provide important clues on the problem of the turbulent dissipation and heating in collisionless systems. In this paper, hybrid Vlasov-Maxwell simulations are employed to analyze in detail the features of the kinetic Alfv\\'en waves at proton kinetic scales, in typical conditions of the solar wind environment. In particular, linear and nonlinear regimes of propagation of these fluctuations have been investigated in a single-wave situation, focusing on the physical processes of collisionless Landau damping and wave-particle resonant interaction. Interestingly, since for wavelengths close to $d_p$ and proton plasma beta $\\bet...

Vasconez, C L; Camporeale, E; Veltri, P

2014-01-01T23:59:59.000Z

268

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

269

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

270

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

271

Definition: Electricity Storage Technologies | Open Energy Information  

Open Energy Info (EERE)

Dictionary.png Dictionary.png Electricity Storage Technologies Technologies that can store electricity to be used at a later time. These devices require a mechanism to convert alternating current (AC) electricity into another form for storage, and then back to AC electricity. Common forms of electricity storage include batteries, flywheels, and pumped hydro. Electricity storage can provide backup power, peaking power, and ancillary services, and can store excess electricity produced by renewable energy resources when available.[1] Related Terms electricity generation References ↑ https://www.smartgrid.gov/category/technology/electricity_storage_technologies [[C LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ategory: Smart Grid Definitionssmart grid,smart grid,

272

FY06 DOE Energy Storage Program PEER Review  

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

6 DOE Energy Storage Program 6 DOE Energy Storage Program PEER REVIEW John D. Boyes Sandia National Laboratories ESS Program Makeup ESS Base Program - CEC/DOE Data Acquisition and Project Support - NYSERDA/DOE Data Acquisition and Project Support - Boeing Superconducting Flywheel - ACONF Coast Guard Project - HybSim Hybrid Storage Model Development Congressionally-Directed Programs - University of Missouri-Rolla - Grid Modernization - Iowa Stored Energy Project - EEI - BiPolar Ni-MH Battery Development - Sprint - Storage for Telecommunications Apps. - Emerson - Network Power - Beacon Power - Frequency Regulation Plant Design - Mead Westvaco - Research on Lead-Carbon Asymmetric Super capacitors (FY05) ESS Program Makeup (cont.) ESS Program Makeup cont. SBIR - Aegis Technology - PII - Arkansas Power Electronic International -

273

Energy Storage Systems 2006 Peer Review - Day 2 morning presentations |  

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

6 Peer Review - Day 2 morning 6 Peer Review - Day 2 morning presentations Energy Storage Systems 2006 Peer Review - Day 2 morning presentations The 2006 Peer Review Meeting for the DOE Energy Storage Systems (ESS) Program was held in Washington DC on November 2-3, 2006. Current and completed program projects were presented and reviewed by a group of industry professionals. Presentations from the Day 2 morning session are below. ESS 2006 Peer Review - EESAT 2007 Conference Information - Georgianne Peek, SNL.pdf ESS 2006 Peer Review - Ultracapacitor EnergyBridge UPS - Chris McKay, Northern Power.pdf ESS 2006 Peer Review - Flywheel-based Frequency Regulation Demonstration Projects - Jim Arseneaux, Beacon Power.pdf ESS 2006 Peer Review - Design of the FESS 20MW Frequency Regulation Plant -

274

Energy Storage Systems 2010 Update Conference Presentations - Day 1,  

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

3 3 Energy Storage Systems 2010 Update Conference Presentations - Day 1, Session 3 The U.S. DOE Energy Storage Systems Program (ESS) conducted a record-breaking Update Conference at the Washington DC Marriott Hotel on Nov. 2 - 4, 2010, with more than 500 attendees. The 2010 agenda reflected increased national interest in energy storage issues. The 3-day conference included 11 sessions plus a poster session on the final day. Presentations from the third session of Day 1, chaired by PNNL's Jun Lui, are below. ESS 2010 Update Conference - MetILs, New Ionic Liquids for Flow Batteries - Travis Anderson, SNL.pdf ESS 2010 Update Conference - Nitrogen-Air Battery - David Ingersoll, SNL.pdf ESS 2010 Update Conference - Improved Properties of Nanocomposites for Flywheel Applications - Tim Boyle, SNL.pdf

275

Department of Energy and Beacon Power Finalize $43 Million Loan Guarantee  

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

Beacon Power Finalize $43 Million Loan Beacon Power Finalize $43 Million Loan Guarantee for Innovative Energy Storage Project in New York State Department of Energy and Beacon Power Finalize $43 Million Loan Guarantee for Innovative Energy Storage Project in New York State August 9, 2010 - 12:00am Addthis Washington D.C. --- Energy Secretary Steven Chu today announced that a $43 million loan guarantee has been finalized for Beacon Power Corporation's 20 megawatt innovative flywheel energy storage plant in Stephentown, NY. The plant will help improve the stability and reliability of the state's electric grid and Beacon estimates it will create 20 construction jobs in New York and 40 permanent jobs in Massachusetts. Beacon Power is an energy storage company headquartered in Tyngsboro, Massachusetts.

276

Education Toolbox Search | Department of Energy  

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

terms Search Retain current filters Showing 1 - 2 of 2 results. Video Energy 101: Hydroelectric Power Learn how hydropower captures the kinetic energy of flowing water and turns...

277

Education Toolbox Search | Department of Energy  

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

terms Search Retain current filters Showing 1 - 10 of 10 results. Video Energy 101: Hydroelectric Power Learn how hydropower captures the kinetic energy of flowing water and turns...

278

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 " â–  ' 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

279

Thermodynamics and Kinetics Analysis of Gasoline Reforming Assisted by Arc Discharge  

Science Journals Connector (OSTI)

Thermodynamics and Kinetics Analysis of Gasoline Reforming Assisted by Arc Discharge ... In the first one, the electric discharge is accounted for as a homogeneous energy source inside the whole reactor. ... kinetic schemes, without inclusion of specific plasma processes, is sufficient for simulation of H prodn. in discharges with hot plasmas, in particular, in low-current arc discharges. ...

Jean-Damien Rollier; Guillaume Petitpas; José Gonzalez-Aguilar; Adeline Darmon; Laurent Fulcheri; Rudolf Metkemeijer

2008-04-18T23:59:59.000Z

280

Intrinsic Primary and Secondary Hydrogen Kinetic Isotope Effects for Alanine Racemase from Global Analysis of  

E-Print Network (OSTI)

Intrinsic Primary and Secondary Hydrogen Kinetic Isotope Effects for Alanine Racemase from Global of the intrinsic primary kinetic isotope effects, the lower boundary on the energy of the quinonoid intermediate, making alanine racemase an attractive target for antibacterials. Global analysis of protiated

Toney, Michael

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Dependability of Wind Energy Generators with Short-Term Energy Storage  

Science Journals Connector (OSTI)

...system connected into a common grid. This leads to a maximum possible...power plant. With the present grid size, this means that wind...storage systems are batteries, flywheels, pumped water, compressed...probably being associated with a flywheel system. In Fig. 1, power...

BENT SØRENSEN

1976-11-26T23:59:59.000Z

282

MHK Technologies/OCEANTEC Wave Energy Converter | Open Energy Information  

Open Energy Info (EERE)

Wave Energy Converter Wave Energy Converter < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage OCEANTEC Wave Energy Converter.jpg Technology Profile Primary Organization OCEANTEC Energias Marinas S L Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description OCEANTEC Marine Energy Company Ltd owned by Iberdrola and TECNALIA is developing a sensor for wave energy technology type Spanish attenuator Floating body oscillates due to wave excitation in its main DOF pitch Mooring system allows the body to weathervane so that it is faced to the predominant wave propagation direction Main advantage capture system completely encapsulated free of contact with sea water A flywheel continuously spins under the action of an electric motor Z The pitching motion of the WEC caused by wave action is transformed into an alternating precession in the longitudinal hull axis X A coupling device transforms this precession into an unidirectional rotation of higher frequency that is used to feed a conventional electric generator

283

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

284

Energy  

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

Energy newsroomassetsimagesenergy-icon.png Energy Research into alternative forms of energy, and improving and securing the power grid, is a major national security...

285

Portable Energy and Propulsion Technologies  

Science Journals Connector (OSTI)

An electro-dynamic flywheel device or “mechanical battery” is a ... everyone’s garage by electricity from the power grid. In such a direct electricity-to-electricity ... chemical or electrochemical storage system...

Jeff W. Eerkens

2010-01-01T23:59:59.000Z

286

Moderately dense gas quantum kinetic theory: Aspects of pair correlations R. F. Snider and G. W. Wei  

E-Print Network (OSTI)

Boltzmann equation emphasizes the need to explicitly include pair correlations and the conversion of kinetic energy to potential energy as important effects in the kinetic theory of moderately dense gases that the pair density operator used for collisions should be such that it factors both before and after

Wei, Guo-Wei

287

Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2  

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

Poster Poster Session 2 (Day 2): SBIR Projects Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2 (Day 2): SBIR Projects The U.S. DOE Energy Storage Systems Program (ESS) conducted a peer review and update meeting in Washington, DC on Sept. 26 - 28, 2012. The 3-day conference included 9 sessions plus two poster sessions. SBIR project presentations from the second poster session on Day 2, chaired by Sandia's Georgianne Huff, are below. ESS 2012 Peer Review - Higher Power Motor for ARPA-E Flywheel - Jim Arseneaux, Beacon Power ESS 2012 Peer Review - Acid Based Blend Membranes for Redox Flow Batteries - Alan Cisar, Lynntech ESS 2012 Peer Review - Flow Battery Membrane - David Ofer, Tiax ESS 2012 Peer Review - Sodium Intercalation Battery for Stationary Storage

288

Note on numerical study of the beam energy spread in NDCX-I  

E-Print Network (OSTI)

of beam current, (d) kinetic energy history by of beam macroF I G . 3. N D C X - I beam energy history from (left) Warpplate and their kinetic energy history is plotted in F i g .

Vay, J.-L.

2011-01-01T23:59:59.000Z

289

ONE-DIMENSIONAL PSEUDO-HOMOGENEOUS PACKED BED REACTOR MODELING INCLUDING NO-CO KINETICS  

E-Print Network (OSTI)

the chemical species and energy equations for dynamically incompressible flow in one-dimension. Furthermore, the chemical kinetics on the reduction reaction of nitric oxide by carbon monoxide over rhodium-alumina and platinum-alumina catalysts is investigated...

Srinivasan, Anand

2011-08-31T23:59:59.000Z

290

Design Principles of a flywheel Regenerative Braking System (f-RBS) for Formula SAE type racecar and system testing on a Virtual Test Rig modeled on MSC ADAMS  

E-Print Network (OSTI)

momentum in the industry [4]. These vehicles (BEVs and HEVS) use electric motor/generator pairs to propel themselves and to recapture braking energy (electric RBS) and the power source is the battery. The regenerative braking system uses a generator..., aerodynamic and road losses. 4. Improvised Transmission design to reduce losses. 5. Hybrid and Alternative Energy Propulsion systems e.g. the Hybrid Electric Vehicle (HEV), the Fuel Cell Vehicle (FCV). 6. Recycling Braking energy – Storage and reuse...

Pochiraju, Anirudh

2012-08-31T23:59:59.000Z

291

Kinetic Isotope Effects of L-Dopa Decarboxylase  

Science Journals Connector (OSTI)

Kinetic Isotope Effects of L-Dopa Decarboxylase ... A mixed centroid path integral and free energy perturbation method (PI-FEP/UM) has been used to investigate the primary carbon and secondary hydrogen kinetic isotope effects (KIEs) in the amino acid decarboxylation of L-Dopa catalyzed by the enzyme L-Dopa decarboxylase (DDC) along with the corresponding uncatalyzed reaction in water. ... The computed kinetic isotope effects (KIE) on the carboxylate C-13 are consistent with that observed on decarboxylation reactions of other PLP-dependent enzymes, whereas the KIEs on the ? carbon and secondary proton, which can easily be validated experimentally, may be used as a possible identification for the active form of the PLP tautomer in the active site of DDC. ...

Yen-lin Lin; Jiali Gao

2011-03-02T23:59:59.000Z

292

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

293

First principles Tafel kinetics of methanol oxidation on Pt(111)  

Science Journals Connector (OSTI)

Abstract Electrocatalytic methanol oxidation is of fundamental importance in electrochemistry and also a key reaction in direct methanol fuel cell. To resolve the kinetics at the atomic level, this work investigates the potential-dependent reaction kinetics of methanol oxidation on Pt(111) using the first principles periodic continuum solvation model based on modified-Poisson–Boltzmann equation (CM-MPB), focusing on the initial dehydrogenation elementary steps. A theoretical model to predict Tafel kinetics (current vs potential) is established by considering that the rate-determining step of methanol oxidation (to CO) is the first CH bond breaking (CH3OH(aq) ? CH2OH* + H*) according to the computed free energy profile. The first CH bond breaking reaction needs to overcome a large entropy loss during methanol approaching to the surface and replacing the adsorbed water molecules. While no apparent charge transfer is involved in this elementary step, the charge transfer coefficient of the reaction is calculated to be 0.36, an unconventional value for charge transfer reactions, and the Tafel slope is deduced to be 166 mV. The results show that the metal/adsorbate interaction and the solvation environment play important roles on influencing the Tafel kinetics. The knowledge learned from the potential-dependent kinetics of methanol oxidation can be applied in general for understanding the electrocatalytic reactions of organic molecules at the solid–liquid interface.

Ya-Hui Fang; Zhi-Pan Liu

2014-01-01T23:59:59.000Z

294

Gravitational energy  

E-Print Network (OSTI)

Observers at rest in a stationary spacetime flat at infinity can measure small amounts of rest-mass+internal energies+kinetic energies+pressure energy in a small volume of fluid attached to a local inertial frame. The sum of these small amounts is the total "matter energy" for those observers. The total mass-energy minus the matter energy is the binding gravitational energy. Misner, Thorne and Wheeler evaluated the gravitational energy of a spherically symmetric static spacetime. Here we show how to calculate gravitational energy in any static and stationary spacetime for isolated sources with a set of observers at rest. The result of MTW is recovered and we find that electromagnetic and gravitational 3-covariant energy densities in conformastatic spacetimes are of opposite signs. Various examples suggest that gravitational energy is negative in spacetimes with special symmetries or when the energy-momentum tensor satisfies usual energy conditions.

Joseph Katz

2005-10-20T23:59:59.000Z

295

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,...

296

Chemical kinetics parameters of nuclear graphite gasification  

Science Journals Connector (OSTI)

This paper provides chemical kinetics parameters for the gasification of nuclear graphite grades of IG-110, IG-430, NBG-18 and NBG-25 and presents empirical correlations for their surface areas of free active sites as a function of mass. The kinetics parameters for the four elementary chemical reactions of gasification of these grades of nuclear graphite include the values and Gaussian distributions of the specific activation energies and the values of the pre-exponential rate coefficients for the adsorption of oxygen and desorption of CO and CO2 gases. The values of these parameters and the surface area of free active sites for IG-110 and NB-25, with fine and medium petroleum coke filler particles, are nearly the same, but slightly different from those of NBG-18 and IG-430, with medium and fine coal tar pitch coke filler particles. Recommended parameters are applicable to future safety analysis of high and very high temperature gas cooled reactors in the unlikely event of a massive air ingress accident.

Mohamed S. El-Genk; Jean-Michel P. Tournier

2013-01-01T23:59:59.000Z

297

The Impact of Alternative Fuels on Combustion Kinetics  

SciTech Connect

The research targets the development of detailed kinetic models to quantitatively characterize the impact of alternative fuels on the performance of Navy turbines and diesel engines. Such impacts include kinetic properties such as cetane number, flame speed, and emissions as well as physical properties such as the impact of boiling point distributions on fuel vaporization and mixing. The primary focus will be Fischer-Tropsch liquids made from natural gas, coal or biomass. The models will include both the effects of operation with these alternative fuels as well as blends of these fuels with conventional petroleum-based fuels. The team will develop the requisite kinetic rules for specific reaction types and incorporate these into detailed kinetic mechanisms to predict the combustion performance of neat alternative fuels as well as blends of these fuels with conventional fuels. Reduced kinetic models will be then developed to allow solution of the coupled kinetics/transport problems. This is a collaboration between the Colorado School of Mines (CSM) and the Lawrence Livermore National Laboratory (LLNL). The CSM/LLNL team plans to build on the substantial progress made in recent years in developing accurate detailed chemical mechanisms for the oxidation and pyrolysis of conventional fuels. Particular emphasis will be placed upon reactions of the isoalkanes and the daughter radicals, especially tertiary radicals, formed by abstraction from the isoalkanes. The various components of the program are described. We have been developing the kinetic models for two iso-dodecane molecules, using the same kinetic modeling formalisms that were developed for the gasoline and diesel primary reference fuels. These mechanisms, and the thermochemical and transport coefficient submodels for them, are very close to completion at the time of this report, and we expect them to be available for kinetic simulations early in the coming year. They will provide a basis for prediction and selection of desirable F-T molecules for use in jet engine simulations, where we should be able to predict the ignition, combustion and emissions characteristics of proposed fuel components. These mechanisms include the reactions and chemical species needed to describe high temperature phenomena such as shock tube ignition and flammability behavior, and they will also include low temperature kinetics to describe other ignition phenomena such as compression ignition and knocking. During the past years, our hydrocarbon kinetics modeling group at LLNL has focused a great deal on fuels typical of gasoline and diesel fuel. About 10 years ago, we developed kinetic models for the fuel octane primary reference fuels, n-heptane [1] and iso-octane [2], which have 7 and 8 carbon atoms and are therefore representative of typical gasoline fuels. N-heptane represents the low limit of knock resistance with an octane number of 0, while iso-octane is very knock resistant with an octane number of 100. High knock resistance in iso-octane was attributed largely to the large fraction of primary C-H bonds in the molecule, including 15 of the 18 C-H bonds, and the high bond energy of these primary bonds plays a large role in this knock resistance. In contrast, in the much more ignitable n-heptane, 10 of its 16 C-H bonds are much less strongly bound secondary C-H bonds, leading to its very low octane number. All of these factors, as well as a similarly complex kinetic description of the equally important role of the transition state rings that transfer H atoms within the reacting fuel molecules, were quantified and collected into large kinetic reaction mechanisms that are used by many researchers in the fuel chemistry world.

Pitz, W J; Westbrook, C K

2009-07-30T23:59:59.000Z

298

Energy Storage and Solar Power: An Exaggerated Problem  

Science Journals Connector (OSTI)

...capac-ity in an electric grid. The data base for wind correlation...intermittent sources through a grid to circumvent storage is particularly...com-pressed-air systems, flywheels, and su-perconducting magnets...compressed-air systems, flywheels, and superconducting storage...

WILLIAM D. METZ

1978-06-30T23:59:59.000Z

299

Emergence of energy storage technologies as the solution for reliable operation of smart power systems: A review  

Science Journals Connector (OSTI)

Abstract The ever increasing penetration of renewable energy systems (RESs) in today deregulated intelligent power grids, necessitates the use of electrical storage systems. Energy storage systems (ESSs) are helpful to make balance between generation and demand improving the performance of whole power grid. In collaboration with RESs, energy storage devices can be integrated into the power networks to bring ancillary service for the power system and hence enable an increased penetration of distributed generation (DG) units. This paper presents different applications of electrical energy storage technologies in power systems emphasizing on the collaboration of such entities with RESs. The role of \\{ESSs\\} in intelligent micropower grids is also discussed where the stochastic nature of renewable energy sources may affect the power quality. Particular attention is paid to flywheel storage, electrochemical storage, pumped hydroelectric storage, and compressed air storage and their operating principle are discussed as well. The application of each type in the area of power system is investigated and compared to others.

Sam Koohi-Kamali; V.V. Tyagi; N.A. Rahim; N.L. Panwar; H. Mokhlis

2013-01-01T23:59:59.000Z

300

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

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Wind Energy Basics | Department of Energy  

Energy Savers (EERE)

with the United States increasing its wind power capacity 30% year over year. Wind turbines, as they are now called, collect and convert the kinetic energy that wind produces...

302

Energy  

Science Journals Connector (OSTI)

Energy ... “Scientific Challenges in Sustainable Energy Technology,” by Nathan S. Lewis of the California Institute of Technology, summarizes data on energy resources and analyses the implications for human society. ... ConfChem Conference on Educating the Next Generation: Green and Sustainable Chemistry—Solar Energy: A Chemistry Course on Sustainability for General Science Education and Quantitative Reasoning ...

John W. Moore

2008-07-01T23:59:59.000Z

303

Kinetics of wet sodium vapor complex plasma  

SciTech Connect

In this paper, we have investigated the kinetics of wet (partially condensed) Sodium vapor, which comprises of electrons, ions, neutral atoms, and Sodium droplets (i) in thermal equilibrium and (ii) when irradiated by light. The formulation includes the balance of charge over the droplets, number balance of the plasma constituents, and energy balance of the electrons. In order to evaluate the droplet charge, a phenomenon for de-charging of the droplets, viz., evaporation of positive Sodium ions from the surface has been considered in addition to electron emission and electron/ion accretion. The analysis has been utilized to evaluate the steady state parameters of such complex plasmas (i) in thermal equilibrium and (ii) when irradiated; the results have been graphically illustrated. As a significant outcome irradiated, Sodium droplets are seen to acquire large positive potential, with consequent enhancement in the electron density.

Mishra, S. K., E-mail: nishfeb@rediffmail.com [Institute for Plasma Research (IPR), Gandhinagar 382428 (India); Sodha, M. S. [Centre of Energy Studies, Indian Institute of Technology Delhi (IITD), New Delhi 110016 (India)] [Centre of Energy Studies, Indian Institute of Technology Delhi (IITD), New Delhi 110016 (India)

2014-04-15T23:59:59.000Z

304

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

305

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.

306

MHK Technologies/Gyroscopic wave power generation system | Open Energy  

Open Energy Info (EERE)

Gyroscopic wave power generation system Gyroscopic wave power generation system < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization Gyrodynamics Corporation Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description This gyroscopic wave power generation system is a pure rotational mechanical system that does not use conventional air turbines and is housed on a unique floating platform float In particular its outstanding feature is that it utilizes the gyroscopic spinning effect A motor is used to turn a 1 meter diameter steel disc flywheel inside the apparatus and when the rolling action of waves against the float tilts it at an angle the gyroscopic effect causes the disc to rotate longitudinally This energy turns a generator producing electricity

307

EA-1631: Finding of No Significant Impact | Department of Energy  

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

31: Finding of No Significant Impact 31: Finding of No Significant Impact EA-1631: Finding of No Significant Impact Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, N.Y. The environmental assessment examines the potential environmental impacts associated with issuing a Federal loan guarantee to Beacon Power Corporation for construction and operation of a flywheel-based frequency regulation facility at an undeveloped seven acre site in Stephentown, New York. Environmental Assessment for Department of Energy Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, New York, DOE/EA-1631, February 2009, Finding of No Significant Impact More Documents & Publications EA-1631: Final Environmental Assessment EA-1753: Finding of No Significant Impact

308

Benchmarking kinetic calculations of resistive wall mode stability  

SciTech Connect

Validating the calculations of kinetic resistive wall mode (RWM) stability is important for confidently predicting RWM stable operating regions in ITER and other high performance tokamaks for disruption avoidance. Benchmarking the calculations of the Magnetohydrodynamic Resistive Spectrum—Kinetic (MARS-K) [Y. Liu et al., Phys. Plasmas 15, 112503 (2008)], Modification to Ideal Stability by Kinetic effects (MISK) [B. Hu et al., Phys. Plasmas 12, 057301 (2005)], and Perturbed Equilibrium Nonambipolar Transport (PENT) [N. Logan et al., Phys. Plasmas 20, 122507 (2013)] codes for two Solov'ev analytical equilibria and a projected ITER equilibrium has demonstrated good agreement between the codes. The important particle frequencies, the frequency resonance energy integral in which they are used, the marginally stable eigenfunctions, perturbed Lagrangians, and fluid growth rates are all generally consistent between the codes. The most important kinetic effect at low rotation is the resonance between the mode rotation and the trapped thermal particle's precession drift, and MARS-K, MISK, and PENT show good agreement in this term. The different ways the rational surface contribution was treated historically in the codes is identified as a source of disagreement in the bounce and transit resonance terms at higher plasma rotation. Calculations from all of the codes support the present understanding that RWM stability can be increased by kinetic effects at low rotation through precession drift resonance and at high rotation by bounce and transit resonances, while intermediate rotation can remain susceptible to instability. The applicability of benchmarked kinetic stability calculations to experimental results is demonstrated by the prediction of MISK calculations of near marginal growth rates for experimental marginal stability points from the National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)].

Berkery, J. W.; Sabbagh, S. A. [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)] [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States); Liu, Y. Q. [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)] [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Wang, Z. R.; Logan, N. C.; Park, J.-K.; Manickam, J. [Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)] [Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States); Betti, R. [Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)] [Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

2014-05-15T23:59:59.000Z

309

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...

310

LABORATORY III POTENTIAL ENERGY  

E-Print Network (OSTI)

LABORATORY III POTENTIAL ENERGY Lab III - 1 In previous problems, you have been introduced to the concepts of kinetic energy, which is associated with the motion of an object, and internal energy, which is associated with the internal structure of a system. In this section, you work with another form of energy

Minnesota, University of

311

Master equation approach to protein folding and kinetic traps  

E-Print Network (OSTI)

The master equation for 12-monomer lattice heteropolymers is solved numerically and the time evolution of the occupancy of the native state is determined. At low temperatures, the median folding time follows the Arrhenius law and is governed by the longest relaxation time. For good folders, significant kinetic traps appear in the folding funnel whereas for bad folders, the traps also occur in non-native energy valleys.

Marek Cieplak; Malte Henkel; Jan Karbowski; Jayanth R. Banavar

1998-04-21T23:59:59.000Z

312

Thermodynamics of Potassium Exchange in Soil Using a Kinetics Approach1 D. L. SPARKS AND P. M. JARDINEZ  

E-Print Network (OSTI)

Thermodynamics of Potassium Exchange in Soil Using a Kinetics Approach1 D. L. SPARKS AND P. M. JARDINEZ ABSTRACT Thermodynamics of potassium (K) exchange using a kinetics ap- proach was investigated that more energy was needed to desorb K than to adsorb K. Thermodynamic and pseudother- modynamic parameters

Sparks, Donald L.

313

Electrical energy storage systems: A comparative life cycle cost analysis  

Science Journals Connector (OSTI)

Abstract Large-scale deployment of intermittent renewable energy (namely wind energy and solar PV) may entail new challenges in power systems and more volatility in power prices in liberalized electricity markets. Energy storage can diminish this imbalance, relieving the grid congestion, and promoting distributed generation. The economic implications of grid-scale electrical energy storage technologies are however obscure for the experts, power grid operators, regulators, and power producers. A meticulous techno-economic or cost-benefit analysis of electricity storage systems requires consistent, updated cost data and a holistic cost analysis framework. To this end, this study critically examines the existing literature in the analysis of life cycle costs of utility-scale electricity storage systems, providing an updated database for the cost elements (capital costs, operational and maintenance costs, and replacement costs). Moreover, life cycle costs and levelized cost of electricity delivered by electrical energy storage is analyzed, employing Monte Carlo method to consider uncertainties. The examined energy storage technologies include pumped hydropower storage, compressed air energy storage (CAES), flywheel, electrochemical batteries (e.g. lead–acid, NaS, Li-ion, and Ni–Cd), flow batteries (e.g. vanadium-redox), superconducting magnetic energy storage, supercapacitors, and hydrogen energy storage (power to gas technologies). The results illustrate the economy of different storage systems for three main applications: bulk energy storage, T&D support services, and frequency regulation.

Behnam Zakeri; Sanna Syri

2015-01-01T23:59:59.000Z

314

Answers for Homework Handout for unit 4 Work and Energy  

E-Print Network (OSTI)

potential energy spinning top: (rotational) kinetic energy pot of hot water: thermal (kinetic) energy x-rays: electromagnetic energy (not really "storage" per se, however) 6. From the top to the bottom, the gymnast's centerAnswers for Homework Handout for unit 4 Work and Energy 1. Here we use W = F D = FD cos : a) W

Mansell, Edward "Ted"

315

Toward Cost-Effective Solar Energy Use  

Science Journals Connector (OSTI)

...cost), then the sale price of grid-connected PV electricity...would have to be hooked up to the grid, and they would have to cost as...superconducting global transmission grid, supercapacitors, flywheels, etc., as promoted by Smalley...

Nathan S. Lewis

2007-02-09T23:59:59.000Z

316

Slide 1  

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

10 Amber Kinetics, Inc. All rights reserved. 10 Amber Kinetics, Inc. All rights reserved. Edward Chiao | co-founder & CEO | nov 2010 Amber_Kinetics, Inc. | utility scale flywheel energy storage Smart Grid Demonstration Program Sub-Area: 2.5 Demonstration of Promising Energy Storage Technologies Funded in part by the Energy Storage Systems Program of the U.S. Department Of Energy through National Energy Technology Laboratory Copyright 2010 Amber Kinetics, Inc. All rights reserved. problem intermittent wind & solar generation = unstable electric grid Copyright 2010 Amber Kinetics, Inc. All rights reserved. solution energy storage: balances supply & demand = smarter electric grid Copyright 2010 Amber Kinetics, Inc. All rights reserved. Metric Requirements Capital Cost < $1,500 / kW (4 hr duration)

317

The 700-1500 cm{sup ?1} region of the S{sub 1} (A{sup ~1}B{sub 2}) state of toluene studied with resonance-enhanced multiphoton ionization (REMPI), zero-kinetic-energy (ZEKE) spectroscopy, and time-resolved slow-electron velocity-map imaging (tr-SEVI) spectroscopy  

SciTech Connect

We report (nanosecond) resonance-enhanced multiphoton ionization (REMPI), (nanosecond) zero-kinetic-energy (ZEKE) and (picosecond) time-resolved slow-electron velocity map imaging (tr-SEVI) spectra of fully hydrogenated toluene (Tol-h{sub 8}) and the deuterated-methyl group isotopologue (?{sub 3}-Tol-d{sub 3}). Vibrational assignments are made making use of the activity observed in the ZEKE and tr-SEVI spectra, together with the results from quantum chemical and previous experimental results. Here, we examine the 700–1500 cm{sup ?1} region of the REMPI spectrum, extending our previous work on the region ?700 cm{sup ?1}. We provide assignments for the majority of the S{sub 1} and cation bands observed, and in particular we gain insight regarding a number of regions where vibrations are coupled via Fermi resonance. We also gain insight into intramolecular vibrational redistribution in this molecule.

Gardner, Adrian M.; Green, Alistair M.; Tamé-Reyes, Victor M.; Reid, Katharine L.; Davies, Julia A.; Parkes, Victoria H. K.; Wright, Timothy G., E-mail: Tim.Wright@nottingham.ac.uk [School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom)

2014-03-21T23:59:59.000Z

318

NAS battery demonstration at American Electric Power:a study for the DOE energy storage program.  

SciTech Connect

The first U.S. demonstration of the NGK sodium/sulfur battery technology was launched in August 2002 when a prototype system was installed at a commercial office building in Gahanna, Ohio. American Electric Power served as the host utility that provided the office space and technical support throughout the project. The system was used to both reduce demand peaks (peak-shaving operation) and to mitigate grid power disturbances (power quality operation) at the demonstration site. This report documents the results of the demonstration, provides an economic analysis of a commercial sodium/sulfur battery energy storage system at a typical site, and describes a side-by-side demonstration of the capabilities of the sodium/sulfur battery system, a lead-acid battery system, and a flywheel-based energy storage system in a power quality application.

Newmiller, Jeff (Endecon Engineering, San Ramon, CA); Norris, Benjamin L. (Norris Energy Consulting Company, Martinez, CA); Peek, Georgianne Huff

2006-03-01T23:59:59.000Z

319

Basic Energy Sciences (BES) at LLNL  

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

in GB Networks Coherency Does Not Equate to Stability Laser Crystallization of Phase Change Material Extraction of Equilibrium Energy and Kinetic Parameters from Single Molecule...

320

Energy  

Gasoline and Diesel Fuel Update (EIA)

Federal, State, local, and foreign governments, EIA survey respondents, and the media. For further information, and for answers to questions on energy statistics, please...

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Energy  

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

Energy Energy Energy Express Licensing Accelerator-Driven Transmutation Of Spent Fuel Elements Express Licensing Acid-catalyzed dehydrogenation of amine-boranes Express Licensing Air Breathing Direct Methanol Fuel Cell Express Licensing Aligned Crystalline Semiconducting Film On A Glass Substrate And Method Of Making Express Licensing Anion-Conducting Polymer, Composition, And Membrane Express Licensing Apparatus for Producing Voltage and Current Pulses Express Licensing Biaxially oriented film on flexible polymeric substrate Express Licensing Corrosion Test Cell For Bipolar Plates Express Licensing Device for hydrogen separation and method Negotiable Licensing Durable Fuel Cell Membrane Electrode Assembly (MEA) Express Licensing Energy Efficient Synthesis Of Boranes Express Licensing

322

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

323

Two-Dimensional Kinetic Turbulence in the Solar Wind  

Science Journals Connector (OSTI)

We present the first 2D hybrid-Vlasov simulations of turbulence in the solar wind that describe the evolution of the energy spectra in a range of two decades of wavelengths around the ion inertial scale. Several previous magnetohydrodynamics and particle-in-cell simulations in the range of large (fluid) wavelengths showed a marked anisotropy of the energy spectra in the direction perpendicular to the mean magnetic field. Here we give evidence that the parallel direction can also be a privileged way for turbulence to develop towards short scales, where kinetic effects govern the plasma dynamics.

F. Valentini; F. Califano; P. Veltri

2010-05-17T23:59:59.000Z

324

A direct search method for determination of DAEM kinetic parameters from nonisothermal TGA data (note)  

Science Journals Connector (OSTI)

In this study, a simple direct search method to be used for the determination of distributed activation energy model (DAEM) kinetic parameters from the nonisothermal thermogravimetric analysis (TGA) data of coals has been introduced. Process steps of ... Keywords: curve fitting, direct search technique, distributed activation energy model (DAEM), thermogravimetric analysis data (TGA)

Mustafa Güne?; Semin Güne?

2002-08-01T23:59:59.000Z

325

Kinetic effects of temperature on rates of genetic divergence and speciation  

E-Print Network (OSTI)

in speciation rates caused by some independent variable, such as earth surface area or solar energy input (5; and ¶Department of Biology, University of New Mexico, Albuquerque, NM 87131 Contributed by James H. Brown, May 2 understood. We derive a model that quantifies the role of kinetic energy in generating biodiver- sity

Brown, James H.

326

Kinetic effects of temperature on rates of genetic divergence and speciation  

Science Journals Connector (OSTI)

...temperature on rates of genetic divergence...University of Florida, Gainesville...role of kinetic energy in generating...predicts that rates of genetic divergence...enormous quantity of energy; it exceeds global...annual fossil fuel consumption by...because the absolute rate of genetic divergence...

Andrew P. Allen; James F. Gillooly; Van M. Savage; James H. Brown

2006-01-01T23:59:59.000Z

327

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...

328

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

329

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

330

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

331

INTRODUCTION Energy harvesting is the transformation of ambient energy present in  

E-Print Network (OSTI)

INTRODUCTION Energy harvesting is the transformation of ambient energy present in the environment into electrical energy. This energy is derived from different external sources such as solar power, thermal energy, wind energy, salinity gradient and kinetic energy. Harvesting energy from ambient vibration has

Sóbester, András

332

Dependability of Wind Energy Generators with Short-Term Energy Storage  

Science Journals Connector (OSTI)

...ca-pacity must be enlarged, or storage facili-ties must be added...re-gions where reservoirs for pumped water storage are available, the wind...Examples of possible storage systems are batteries, flywheels, pumped water, compressed air...

BENT SØRENSEN

1976-11-26T23:59:59.000Z

333

Chemistry Resolved Kinetic Flow Modeling of TATB Based Explosives  

SciTech Connect

Detonation waves in insensitive, TATB based explosives are believed to have multi-time scale regimes. The initial burn rate of such explosives has a sub-microsecond time scale. However, significant late-time slow release in energy is believed to occur due to diffusion limited growth of carbon. In the intermediate time scale concentrations of product species likely change from being in equilibrium to being kinetic rate controlled. They use the thermo-chemical code CHEETAH linked to an ALE hydrodynamics code to model detonations. They term their model chemistry resolved kinetic flow as CHEETAH tracks the time dependent concentrations of individual species in the detonation wave and calculates EOS values based on the concentrations. A HE-validation suite of model simulations compared to experiments at ambient, hot, and cold temperatures has been developed. They present here a new rate model and comparison with experimental data.

Vitello, P A; Fried, L E; Howard, W M; Levesque, G; Souers, P C

2011-07-21T23:59:59.000Z

334

Kinetics of surface roughening and smoothing during ion sputtering  

SciTech Connect

We have measured the kinetics of roughness evolution during low energy ion sputtering of SiO{sub 2} surfaces using in situ x-ray reflectivity. Sputtering with heavy ions (Xe) leads to rapid roughening of the surface that can not be explained by a simple random removal process. Subsequent bombardment with light ions (He,H) leads to an exponential decrease in the surface roughness. These kinetics are explained quantitatively by a linear model that contains a balance between smoothing by surface diffusion and viscous flow and roughening by sputter removal of material. A curvature dependent sputter yield leads to amplification of a limited range of spatial frequencies on the surface and the formation of a ripple topography.

Chason, E.; Mayer, T.M.; Howard, A.J.

1993-12-31T23:59:59.000Z

335

Nonequilibrium sensing and its analogy to kinetic proofreading  

E-Print Network (OSTI)

For a paradigmatic model of chemotaxis, we analyze the effect how a nonzero affinity driving receptors out of equilibrium affects sensitivity. This affinity arises whenever changes in receptor activity involve ATP hydrolysis. The sensitivity integrated over a ligand concentration range is shown to be enhanced by the affinity, providing a measure of how much energy consumption improves sensing. With this integrated sensitivity we can establish an intriguing analogy between sensing with nonequilibrium receptors and kinetic proofreading: the increase in integrated sensitivity is equivalent to the decrease of the error in kinetic proofreading. The influence of the occupancy of the receptor on the phosphorylation and dephosphorylation reaction rates is shown to be crucial for the relation between integrated sensitivity and affinity. This influence can even lead to a regime where a nonzero affinity decreases the integrated sensitivity, which corresponds to anti-proofreading.

Hartich, David; Seifert, Udo

2015-01-01T23:59:59.000Z

336

Protein Folding Kinetics and Thermodynamics from Atomistic Simulations  

Science Journals Connector (OSTI)

Determining protein folding kinetics and thermodynamics from all-atom molecular dynamics (MD) simulations without using experimental data represents a formidable scientific challenge because simulations can easily get trapped in local minima on rough free energy landscapes. This necessitates the computation of multiple simulation trajectories, which can be independent from each other or coupled in some manner, as, for example, in the replica exchange MD method. Here we present results obtained with a new analysis tool that allows the deduction of faithful kinetics data from a heterogeneous ensemble of simulation trajectories. The method is demonstrated on the decapeptide Chignolin for which we predict folding and unfolding time constants of 1.0±0.3 and 2.6±0.4???s, respectively. We also derive the energetics of folding, and calculate a realistic melting curve for Chignolin.

David van der Spoel and M. Marvin Seibert

2006-06-15T23:59:59.000Z

337

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

338

Energy 101: Hydroelectric Power | Department of Energy  

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

Energy 101: Hydroelectric Power Energy 101: Hydroelectric Power Energy 101: Hydroelectric Power August 13, 2013 - 2:27pm Addthis Learn how hydroelectric power, or hydropower, captures the kinetic energy of flowing water and turns it into electricity for our homes and businesses. Humans have been using water to generate power for thousands of years. Hydroelectric power, or hydropower, captures the kinetic energy of flowing water and turns it into electricity, which is then fed into the electrical grid to be used in homes and businesses. This edition of Energy 101 shows how the Energy Department is supporting the development of new hydropower technologies to produce clean, renewable, and reliable power here in the United States. For more information on hydropower from the Office of Energy Efficiency and

339

Electric utility applications of hydrogen energy storage systems  

SciTech Connect

This report examines the capital cost associated with various energy storage systems that have been installed for electric utility application. The storage systems considered in this study are Battery Energy Storage (BES), Superconducting Magnetic Energy Storage (SMES) and Flywheel Energy Storage (FES). The report also projects the cost reductions that may be anticipated as these technologies come down the learning curve. This data will serve as a base-line for comparing the cost-effectiveness of hydrogen energy storage (HES) systems in the electric utility sector. Since pumped hydro or compressed air energy storage (CAES) is not particularly suitable for distributed storage, they are not considered in this report. There are no comparable HES systems in existence in the electric utility sector. However, there are numerous studies that have assessed the current and projected cost of hydrogen energy storage system. This report uses such data to compare the cost of HES systems with that of other storage systems in order to draw some conclusions as to the applications and the cost-effectiveness of hydrogen as a electricity storage alternative.

Swaminathan, S.; Sen, R.K.

1997-10-15T23:59:59.000Z

340

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

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

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

342

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

343

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

344

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.

345

A comprehensive kinetics model for CO oxidation during char combustion  

SciTech Connect

The most important parameter in representing energy feedback to a particle during char combustion concerns the oxidation of CO to CO/sub 2/. If substantial oxidation of CO occurs near a particle, then the greater heat of combustion for the complete oxidation of carbon to CO/sub 2/ (94.1 kcal/mole vs. 26.4 kcal/mole for oxidation to CO) is available for energy feedback mechanisms. ''Energy feedback'' is here defined as any situation in which an individual particle receives a significant fraction of its heat of combustion directly, through the localized oxidation of emitted combustible species, i.e. CO. Conversely, if the oxidation of CO does not occur near a particle, then energy feedback will occur only indirectly, through heating of the bulk gas. The primary reaction product at the particle surface during char combustion is generally considered to be CO, and the location of the subsequent CO oxidation zone plays a very important role in determining the particle temperature. Ayling and Smith performed experimental and modeling work which indicates that CO oxidation is not of major importance under the conditions they investigated, although they noted the need for improved accuracy in measuring char reactivities, as well as for better modeling of the gas phase CO oxidation kinetics. The modeling work presented in this paper attempts to develop an improved understanding of the boundary layer oxidation of CO through the use of a comprehensive set of kinetic expressions.

Haussmann, G.; Kruger, C.

1986-04-01T23:59:59.000Z

346

Energy  

Office of Legacy Management (LM)

..) ".. ..) ".. _,; ,' . ' , ,; Depar?.me.nt ,of.' Energy Washington; DC 20585 : . ' , - $$ o"\ ' ~' ,' DEC ?;$ ;y4,,, ~ ' .~ The Honorable John Kalwitz , 200 E. Wells Street Milwaukee, W~isconsin 53202, . . i :. Dear,Mayor 'Kalwitz: " . " Secretary of Energy Hazel' O'Leary has announceha new,approach 'to,openness in " the Department of Ene~rgy (DOE) and its communications with'the public. In -. support of~this initiative, we areipleased to forward the enclosed information related to the Milwaukee Ai.rport site in your jurisdiction that performed work, for DOE orits predecessor agencies. information; use, and retention. ., This information .is provided for your '/ ,' DOE's Formerly Utilized Sites Remedial:'Action~'Prog&is responsible for ,"'

347

Kinetic modelling of krypton fluoride laser systems  

SciTech Connect

A kinetic model has been developed for the KrF* rare gas halide laser system, specifically for electron-beam pumped mixtures of krypton, fluorine, and either helium or argon. The excitation produced in the laser gas by the e-beam was calculated numerically using an algorithm checked by comparing the predicted ionization yields in the pure rare gases with their experimental values. The excitation of the laser media by multi-kilovolt x-rays was also modeled and shown to be similar to that produced by high energy electrons. A system of equations describing the transfer of the initial gas excitation into the laser upper level was assembled using reaction rate constants from both experiment and theory. A one-dimensional treatment of the interaction of the laser radiation with the gas was formulated which considered spontaneous and stimulated emission and absorption. The predictions of this model were in good agreement with the fluorescence signals and gain and absorption measured experimentally.

Jancaitis, K.S.

1983-11-01T23:59:59.000Z

348

Femtosecond kinetics of photoexcited carriers in germanium  

Science Journals Connector (OSTI)

Thermalization, intervalley scattering, and cooling of photoexcited carriers are observed in the indirect-band-gap semiconductor Ge through time-resolved direct-band-gap transmission and luminescence with 100-fs resolution. The transmission experiment, which uses ?=1.53 ?m, 120-fs pulses from a 76-MHz optical parametric oscillator takes advantage of the indirect-band-gap character of Ge to unambiguously determine the ??L intervalley scattering time at 295 K. The measured ??L transfer time for electrons at the ? valley edge is 230±25 fs yielding 4.2±0.2×108 eV/cm for the D?-L intervalley deformation potential. The luminescence experiments were performed at 10 K using a standard time and spectrally gated up-conversion technique employing an 82-MHz, 80-fs pulse width Ti:sapphire laser operating at ?=750 nm. From the luminescence experiments conducted with peak carrier densities of 1018–1019 cm-3, we observe that ??L,X scattering competes with carrier-carrier scattering so that nonthermalized carriers are observed for up to several hundred femtoseconds after an excitation pulse. Because the initial carrier kinetic energy is quite high we find that in addition to phonon-assisted L-L intervalley scattering, X-L and X-X processes must be included to account for a carrier-cooling time. A value of 5×108 eV/cm is obtained for the DX-X deformation potential.

X. Q. Zhou; H. M. van Driel; G. Mak

1994-08-15T23:59:59.000Z

349

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 &...

350

DOE/EA-1631: Final Environmental Assessment for Department of Energy Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, NY (February 2009)  

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

31 31 Environmental Assessment for DEPARTMENT OF ENERGY LOAN GUARANTEE FOR BEACON POWER CORPORATION FREQUENCY REGULATION FACILITY IN STEPHENTOWN, N.Y. U.S. Department of Energy Loan Guarantee Program Office Washington, DC 20585 February 2009 FINAL ENVIRONMENTAL ASSESSMENT Environmental Assessment for Department of Energy Loan Guarantee for Beacon Power Corporation Frequency Regulation Facility in Stephentown, N.Y. DOE/EA-1631 TABLE OF CONTENTS LIST OF ACRONYMS iii 1.0 PURPOSE AND NEED 1 1.1 Introduction 1 1.2 Purpose and Need for Agency Action 1 2.0 DESCRIPTION OF PROPOSED ACTION AND NO ACTION ALTERNATIVE 3 2.1 Location 3 2.2 Proposed Action 3 2.2.1 Flywheel 3 2.2.2 Project Elements 4 2.2.3 Project Systems 5 2.2.4 Construction

351

HIGH PRESSURE COAL COMBUSTON KINETICS PROJECT  

SciTech Connect

As part of the U.S. Department of Energy (DoE) initiative to improve the efficiency of coal-fired power plants and reduce the pollution generated by these facilities, DOE has funded the High-Pressure Coal Combustion Kinetics (HPCCK) Projects. A series of laboratory experiments were conducted on selected pulverized coals at elevated pressures with the specific goals to provide new data for pressurized coal combustion that will help extend to high pressure and validate models for burnout, pollutant formation, and generate samples of solid combustion products for analyses to fill crucial gaps in knowledge of char morphology and fly ash formation. Two series of high-pressure coal combustion experiments were performed using SRI's pressurized radiant coal flow reactor. The first series of tests characterized the near burner flame zone (NBFZ). Three coals were tested, two high volatile bituminous (Pittsburgh No.8 and Illinois No.6), and one sub-bituminous (Powder River Basin), at pressures of 1, 2, and 3 MPa (10, 20, and 30 atm). The second series of experiments, which covered high-pressure burnout (HPBO) conditions, utilized a range of substantially longer combustion residence times to produce char burnout levels from 50% to 100%. The same three coals were tested at 1, 2, and 3 MPa, as well as at 0.2 MPa. Tests were also conducted on Pittsburgh No.8 coal in CO2 entrainment gas at 0.2, 1, and 2 MPa to begin establishing a database of experiments relevant to carbon sequestration techniques. The HPBO test series included use of an impactor-type particle sampler to measure the particle size distribution of fly ash produced under complete burnout conditions. The collected data have been interpreted with the help of CFD and detailed kinetics simulation to extend and validate devolatilization, char combustion and pollutant model at elevated pressure. A global NOX production sub-model has been proposed. The submodel reproduces the performance of the detailed chemical reaction mechanism for the NBFZ tests.

Stefano Orsino

2005-03-30T23:59:59.000Z

352

Definition: Thermal energy | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Thermal energy Jump to: navigation, search Dictionary.png Thermal energy The kinetic energy associated with the random motions of the molecules of a material or object; often used interchangeably with the terms heat and heat energy. Measured in joules, calories, or Btu.[1][2][3] View on Wikipedia Wikipedia Definition Thermal energy is the part of the total potential energy and kinetic energy of an object or sample of matter that results in the system temperature. It is represented by the variable Q, and can be measured in Joules. This quantity may be difficult to determine or even meaningless unless the system has attained its temperature only through warming (heating), and not been subjected to work input or output, or any other

353

Background and Available Potential Energy in Numerical Simulations of a Boussinesq Fluid.  

E-Print Network (OSTI)

??In flows with stable density stratification, a portion of the gravitational potential energy is available for conversion to kinetic energy. The remainder is not and… (more)

Panse, Shreyas S

2013-01-01T23:59:59.000Z

354

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...

355

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...

356

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...

357

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

358

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...

359

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...

360

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...

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

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...

362

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...

363

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...

364

Southern company energy storage study : a study for the DOE energy storage systems program.  

SciTech Connect

This study evaluates the business case for additional bulk electric energy storage in the Southern Company service territory for the year 2020. The model was used to examine how system operations are likely to change as additional storage is added. The storage resources were allowed to provide energy time shift, regulation reserve, and spinning reserve services. Several storage facilities, including pumped hydroelectric systems, flywheels, and bulk-scale batteries, were considered. These scenarios were tested against a range of sensitivities: three different natural gas price assumptions, a 15% decrease in coal-fired generation capacity, and a high renewable penetration (10% of total generation from wind energy). Only in the elevated natural gas price sensitivities did some of the additional bulk-scale storage projects appear justifiable on the basis of projected production cost savings. Enabling existing peak shaving hydroelectric plants to provide regulation and spinning reserve, however, is likely to provide savings that justify the project cost even at anticipated natural gas price levels. Transmission and distribution applications of storage were not examined in this study. Allowing new storage facilities to serve both bulk grid and transmission/distribution-level needs may provide for increased benefit streams, and thus make a stronger business case for additional storage.

Ellison, James; Bhatnagar, Dhruv; Black, Clifton [Southern Company Services, Inc., Birmingham, AL; Jenkins, Kip [Southern Company Services, Inc., Birmingham, AL

2013-03-01T23:59:59.000Z

365

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

366

Kinetic dissipation and anisotropic heating in a turbulent collisionless plasma  

E-Print Network (OSTI)

The kinetic evolution of the Orszag-Tang vortex is studied using collisionless hybrid simulations. In the magnetohydrodynamic regime this vortex leads rapidly to broadband turbulence. Significant differences from MHD arise at small scales, where the fluid scale energy dissipates into heat almost exclusively through the magnetic field because the protons are decoupled from the magnetic field. Although cyclotron resonance is absent, the protons heat preferentially in the plane perpendicular to the mean field, as in the corona and solar wind. Effective transport coefficients are calculated.

Parashar, T N; Cassak, P A; Matthaeus, W H

2008-01-01T23:59:59.000Z

367

Kinetics of light induced defect creation in organic solar cells  

Science Journals Connector (OSTI)

The kinetics of light-induced recombination centers in bulk heterojunction organic solar cells are measured as a function of exposure time intensity and the illumination photon energy. The density of induced centers increases with exposure but stabilizes partially due to self-annealing. UV exposure is roughly 50 times more effective for defect creation than white light or yellow-filtered white light. Light-induced breaking of C-H bonds to create H-related localized states is proposed as the underlying mechanism.

R. A. Street; D. M. Davies

2013-01-01T23:59:59.000Z

368

Non-minimal Kinetic coupling to gravity and accelerated expansion  

E-Print Network (OSTI)

We study a scalar field with kinetic term coupled to itself and to the curvature, as a source of dark energy, and analyze the role of this new coupling in the accelerated expansion at large times. In the case of scalar field dominance, the scalar field and potential giving rise to power-law expansion are found in some cases, and a dynamical equation of state is calculated for a given solution of the field equations. A behavior very close to that of the cosmological constant was found.

L. N. Granda

2009-11-19T23:59:59.000Z

369

Energy 101: Marine and Hydrokinetic Energy | Department of Energy  

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

Marine and Hydrokinetic Energy Marine and Hydrokinetic Energy Energy 101: Marine and Hydrokinetic Energy Addthis Below is the text version for the Energy 101: Marine & Hydrokinetic Energy video. The words "Energy 101: Marine & Hydrokinetic Energy" appear onscreen. Montage of renewable energy technologies ending with shots of ocean waves. We all know energy can come from the wind and the sun, but there's a plentiful renewable resource covering more than 75% of the planet that you might not have thought about: our water! The movement of the ocean's waves, tides, and currents carries energy that can be harnessed and converted into electricity to power our homes, buildings and cities. The words "Kinetic Energy" appear onscreen with shots of ocean scientists at sea. The words "Marine & Hydrokinetic" appear onscreen.

370

Air Oxidation Kinetics for Zr-based Alloys [Corrosion and Mechanics of  

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

Air Oxidation Kinetics for Air Oxidation Kinetics for Zr-based Alloys Capabilities Materials Testing Environmentally Assisted Cracking (EAC) of Reactor Materials Corrosion Performance/Metal Dusting Overview Light Water Reactors Fatigue Testing of Carbon Steels and Low-Alloy Steels Environmentally Assisted Cracking of Ni-Base Alloys Irradiation-Induced Stress Corrosion Cracking of Austenitic Stainless Steels Steam Generator Tube Integrity Program Air Oxidation Kinetics for Zr-based Alloys Fossil Energy Fusion Energy Metal Dusting Publications List Irradiated Materials Steam Generator Tube Integrity Other Facilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Corrosion and Mechanics of Materials Light Water Reactors Bookmark and Share

371

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

372

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

373

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

374

Nonlinear evolution of the magnetized Kelvin-Helmholtz instability: From fluid to kinetic modeling  

SciTech Connect

The nonlinear evolution of collisionless plasmas is typically a multi-scale process, where the energy is injected at large, fluid scales and dissipated at small, kinetic scales. Accurately modelling the global evolution requires to take into account the main micro-scale physical processes of interest. This is why comparison of different plasma models is today an imperative task aiming at understanding cross-scale processes in plasmas. We report here the first comparative study of the evolution of a magnetized shear flow, through a variety of different plasma models by using magnetohydrodynamic (MHD), Hall-MHD, two-fluid, hybrid kinetic, and full kinetic codes. Kinetic relaxation effects are discussed to emphasize the need for kinetic equilibriums to study the dynamics of collisionless plasmas in non trivial configurations. Discrepancies between models are studied both in the linear and in the nonlinear regime of the magnetized Kelvin-Helmholtz instability, to highlight the effects of small scale processes on the nonlinear evolution of collisionless plasmas. We illustrate how the evolution of a magnetized shear flow depends on the relative orientation of the fluid vorticity with respect to the magnetic field direction during the linear evolution when kinetic effects are taken into account. Even if we found that small scale processes differ between the different models, we show that the feedback from small, kinetic scales to large, fluid scales is negligible in the nonlinear regime. This study shows that the kinetic modeling validates the use of a fluid approach at large scales, which encourages the development and use of fluid codes to study the nonlinear evolution of magnetized fluid flows, even in the collisionless regime.

Henri, P. [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy) [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy); Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur, BP 4229 06304, Nice Cedex 4 (France); Cerri, S. S. [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy) [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy); Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching (Germany); Califano, F.; Pegoraro, F. [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy)] [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy); Rossi, C. [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy) [Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa (Italy); LPP-CNRS, Ecole Polytechnique, UPMC, Université Paris VI, Université Paris XI, route de Saclay, 91128 Palaiseau (France); Faganello, M. [International Institute for Fusion Science/PIIM, UMR 7345 CNRS, Aix-Marseille University, 13397 Marseille (France)] [International Institute for Fusion Science/PIIM, UMR 7345 CNRS, Aix-Marseille University, 13397 Marseille (France); Šebek, O. [Astronomical Institute and Institute of Atmospheric Physics, AS CR Bocni II/1401, CZ-14131 Prague, Czech Republic and Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, B?ehová 7, 11519 Prague (Czech Republic)] [Astronomical Institute and Institute of Atmospheric Physics, AS CR Bocni II/1401, CZ-14131 Prague, Czech Republic and Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, B?ehová 7, 11519 Prague (Czech Republic); Trávní?ek, P. M. [Space Sciences Laboratory, University of California Berkeley, 7 Gauss Way, Berkeley, California 94720, USA and Astronomical Institute and Institute of Atmospheric Physics, AS CR Bocni II/1401, CZ-14131 Prague (Czech Republic)] [Space Sciences Laboratory, University of California Berkeley, 7 Gauss Way, Berkeley, California 94720, USA and Astronomical Institute and Institute of Atmospheric Physics, AS CR Bocni II/1401, CZ-14131 Prague (Czech Republic); Hellinger, P. [Astronomical Institute and Institute of Atmospheric Physics, AS CR Bocni II/1401, CZ-14131 Prague (Czech Republic)] [Astronomical Institute and Institute of Atmospheric Physics, AS CR Bocni II/1401, CZ-14131 Prague (Czech Republic); and others

2013-10-15T23:59:59.000Z

375

High-energy transients  

Science Journals Connector (OSTI)

...kinetic energy. GRB 101225 Christmas burst. GRB 101225 was quite...find an adequate fit to the light curve by positing a 5g asteroid...spectral energy distribution and light curve of the optical emission...observations, and fit the long-term light curve with a template of the...

2013-01-01T23:59:59.000Z

376

An overview of the progress in photoelectrochemical energy conversion  

Science Journals Connector (OSTI)

An overview of the progress in photoelectrochemical energy conversion ... Kinetic studies of carrier transport and recombination at the n-silicon methanol interface ...

Bruce Parkinson

1983-01-01T23:59:59.000Z

377

Mesoscale Energy Spectra of the Mei-Yu Front System. Part II: Moist Available Potential Energy Spectra  

Science Journals Connector (OSTI)

In Part II of this study, a new formulation of the spectral energy budget of moist available potential energy (MAPE) and kinetic energy is derived. Compared to previous formulations, there are three main improvements: (i) the Lorenz available ...

Jun Peng; Lifeng Zhang; Yu Luo; Chunhui Xiong

2014-04-01T23:59:59.000Z

378

Kinetic model for the catalytic disproportionation of pine oleoresin over Pd/C catalyst  

Science Journals Connector (OSTI)

Abstract The kinetics of the disproportionation of pine oleoresin (a renewable bioresource) over a carbon-supported palladium catalyst was studied. Kinetic experiments, constructed to eliminate internal and external mass transfer limitations, were performed in the temperature range of 210–250 °C. The samples, withdrawn from reaction mixtures at different intervals, were determined by GC–MS and GC. A new reaction scheme together with a lumped kinetic model was proposed to describe the complex reaction system. The kinetic parameters for each involved reaction were estimated using the Levenberg–Marquart method by MATLAB software. The various activation energies of rosin acids in pine oleoresin, for the isomerization, dehydrogenation and hydrogenation reactions, were 83.05–172.75 kJ mol?1. The various activation energies of monoterpenes in pine oleoresin, for the dehydrogenation and hydrogenation reactions, were 103.97–133.82 kJ mol?1. The kinetic model well fitted the experimental observations and could be used to predict the concentration distribution of the products at 260 °C. The results showed that the disproportionations of rosin acids and monoterpenes followed second order and first order reactions, respectively. In addition, dehydrogenation was the main reaction in the disproportionation of pine oleoresin. Dehydrogenated acid and p-cymene were main components in the final products.

Linlin Wang; Xiaopeng Chen; Wenjing Sun; Jiezhen Liang; Xu Xu; Zhangfa Tong

2013-01-01T23:59:59.000Z

379

Folding Kinetics of the Cooperatively Folded Subdomain of the IB Ankyrin Repeat Domain  

E-Print Network (OSTI)

Naturales, Universidad de Buenos Aires, C1428EGA Buenos Aires, Argentina 3 Consejo Nacional de Investigaciones Cientificas y Tecnicas de Argentina, C1428EGA Buenos Aires, Argentina Received 17 December 2010 complex folding kinetics, with two sequential on-pathway high-energy intermedi- ates. The effect

Komives, Elizabeth A.

380

A Study on the Relationship between Fuel Composition and Pyrolysis Kinetics  

Science Journals Connector (OSTI)

A Study on the Relationship between Fuel Composition and Pyrolysis Kinetics ... ‡ Foster Wheeler Energy Corporation, Clinton, New Jersey 08809, United States ... The DTR system, illustrated in Figure 1, consists of four main components: a fuel feeder, a preheater, a furnace, and a sample collection probe. ...

Laura C. Bradley; Sharon Falcone Miller; Bruce G. Miller; David A. Tillman

2011-03-26T23:59:59.000Z

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Self-dual soliton solutions in a Chern-Simons-CP(1) model with a nonstandard kinetic term  

E-Print Network (OSTI)

A generalization of the Chern-Simons-CP(1) model is considered by introducing a nonstandard kinetic term. For a particular case, of this nonstandard kinetic term, we show that the model support self-dual Bogomolnyi equations. The BPS energy has a bound proportional to the sum of the magnetic flux and the CP(1) topological charge. The self-dual equations are solved analytically and verified numerically.

Rodolfo Casana; Lucas Sourrouille

2013-11-27T23:59:59.000Z

382

Introduction to progress and promise of superconductivity for energy storage in the electric power sector  

SciTech Connect

Around the world, many groups conduct research, development and demonstration (RD and D) to make storage an economic option for the electric power sector. The progress and prospects for the application of superconductivity, with emphasis on high-temperature superconductivity, to the electric power sector has been the topic of an IEA Implementing Agreement, begun in 1990. The present Task members are Canada, Denmark, Finland, Germany, Israel, Italy, Japan, Korea, the Netherlands, Norway, Sweden, Switzerland, Turkey, the United Kingdom and the US. As a result of the Implementing Agreement, work has been done by the Operating Agent with the full participation of all the member countries. This work has facilitated the exchange of informtion among experts in all countries and has documented relevant assessments. Further, this work has reviewed the status of SMES and is now updating same, as well as investigating the progress on and prospects for flywheels with superconducting bearings. The Operating Agent and Task members find a substantially different set of opportunities for and alternatives to storage than was the case before the 1987 discovery of high-temperature superconductivity. Beside the need to level generation, there is also the need to level the load on transmission lines, increase transmission stability, and increase power quality. These needs could be addressed by high power storage that could be brought in and out of the grid in fractions of a second. Superconducting Magnetic Energy Storage and flywheels with superconducting bearings are devices that deserve continued RD and D because they promise to be the needed storage devices.

Wolsky, A.M.

1998-05-01T23:59:59.000Z

383

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

384

South Africa’s peaceful use of nuclear energy under the nuclear non-proliferation treaty and related treaties .  

E-Print Network (OSTI)

??Energy is the natural power stored in matter which can be potential and kinetic energy. This occurs in nature in various forms such as chemical… (more)

Qasaymeh, Khaled Ahmed

2014-01-01T23:59:59.000Z

385

Kinetic and Fluid Ballooning Stability with Anisotropic Energetic Electron Layers  

SciTech Connect

A kinetic ballooning mode theory is developed from the gyrokinetic equation in the frequency range for which the ions are fluid, the thermal electron response is adiabatic and the hot electrons are non-interacting due to their large drift velocity. Trapped particle effects are ignored, The application of the quasineutrality condition together with the parallel and binomial components of Ampere's Law reduces the gyrokinetic equation to a second order ordinary differential equation along the equilibrium magnetic field lines. The instability dynamics are dominated by the pressure gradients of the thermal species in the fluid magnetohydrodynamic limit. The resulting equation combines features of both the Kruskal-Oberman energy principle and the rigid hot particle energy principle proposed by Johnson et al. to model the Astron device.

Cooper, W. A. [Ecole Polytechnique Federale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confederation Suisse, CH-1015 Lausanne (Switzerland)

2006-11-30T23:59:59.000Z

386

Consistent description of kinetic equation with triangle anomaly  

SciTech Connect

We provide a consistent description of the kinetic equation with a triangle anomaly which is compatible with the entropy principle of the second law of thermodynamics and the charge/energy-momentum conservation equations. In general an anomalous source term is necessary to ensure that the equations for the charge and energy-momentum conservation are satisfied and that the correction terms of distribution functions are compatible to these equations. The constraining equations from the entropy principle are derived for the anomaly-induced leading order corrections to the particle distribution functions. The correction terms can be determined for the minimum number of unknown coefficients in one charge and two charge cases by solving the constraining equations.

Pu Shi; Gao Jianhua; Wang Qun [Interdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)

2011-05-01T23:59:59.000Z

387

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

388

The emerging roles of energy storage in a competitive power market: Summary of a DOE Workshop  

SciTech Connect

This report contains a summary of the workshop, {open_quotes}The Emerging Roles of Energy Storage in a Competitive Power Market,{close_quotes} which was sponsored by the U.S. Department of Energy and Sandia National Laboratories and was held in Pleasanton, California on December 6-7, 1994. More than 70 people attended, representing government agencies, national laboratories, equipment vendors, electric utilities and other energy providers, venture capital interests, and consultants. Many types of energy storage were discussed, including electrical (batteries and superconducting magnets), mechanical (flywheels and pumped hydro), hydrogen, compressed air, and thermal energy storage. The objectives of the workshop were to communicate within the energy storage community regarding the costs, benefits, and technical status of various technology options; to explore and elucidate the evolving roles of energy storage in a more dynamic and competitive power and energy marketplace; and to discuss the optimum federal role in this area. The goals of the workshop were fully realized through knowledgeable and insightful presentations and vigorous discussion, which are summarized.

Gordon, S.P.; Falcone, P.K. [eds.

1995-06-01T23:59:59.000Z

389

Investigation of Coal-biomass Catalytic Gasification using Experiments, Reaction Kinetics, and Computational Fluid Dynamics  

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

Coal-biomass Catalytic Coal-biomass Catalytic Gasification using Experiments, Reaction Kinetics, and Computational Fluid Dynamics Background The U.S. Department of Energy (DOE) supports research and development efforts targeted to improve efficiency and reduce the negative environmental effects of the use of fossil fuels. One way to achieve these goals is to combine coal with biomass to create synthesis gas (syngas) for use in turbines and refineries to produce energy, fuels,

390

Wind energy | Open Energy Information  

Open Energy Info (EERE)

(Redirected from Wind) (Redirected from Wind) Jump to: navigation, search Wind energy is a form of solar energy.[1] Wind energy (or wind power) describes the process by which wind is used to generate electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. A generator can convert mechanical power into electricity[2]. Mechanical power can also be utilized directly for specific tasks such as pumping water. The US DOE developed a short wind power animation that provides an overview of how a wind turbine works and describes the wind resources in the United States. Contents 1 Wind Energy Basics 1.1 Equation for Wind Power 2 DOE Wind Programs and Information 3 Worldwide Installed Capacity 3.1 United States Installed Capacity 4 Wind Farm Development 4.1 Land Requirements

391

Energy Conversions and Mean Vertical Motions in the High Latitude Summer Mesosphere and Lower Thermosphere  

Science Journals Connector (OSTI)

As is well known, an appreciable part of the solar energy initially absorbed in the upper atmosphere is not immediately converted to kinetic energy, but appears in chemical form (dissociation energy or energy ...

Paul J. Crutzen

1971-01-01T23:59:59.000Z

392

Computational Fluid Dynamic Simulations of a Pilot-Scale Transport Coal Gasifier: Evaluation of Reaction Kinetics  

Science Journals Connector (OSTI)

It was found that appropriate chemical kinetics for gasification reactions are key to the numerical prediction of syngas composition and the kinetics from Niksa Energy Associate’s PC Coal Lab yielded reasonable agreement to the experimental data. ... Air for the primary burner is present below the recycle feed, and additional air is fed into the mixing zone from various locations between coal and recycle inlets; this arrangement evenly distributes heat generated from the partial combustion of the circulating solids. ... Char burning rates become faster with coals of progressively lower rank, although the reactivity is somewhat less sensitive to coal quality at elevated pressure than at atm. pressure. ...

Tingwen Li; Kiran Chaudhari; Dirk VanEssendelft; Richard Turton; Philip Nicoletti; Mehrdad Shahnam; Chris Guenther

2013-11-18T23:59:59.000Z

393

The jet kinetic power, distance and inclination of GRS 1915+105  

E-Print Network (OSTI)

We apply a recently developed technique of calculating the minimum jet kinetic power to the major mass ejections of the black-hole binary GRS 1915+105 observed in radio wavelengths in 1994 and 1997. We derive for them the distance-dependent minimum power, the mass flow rate, the total energy content and the total mass. We find that a very fast increase of the jet power with the increasing distance combined with a known relation between the jet kinetic power and luminosity imply the source distance is 9 kpc.

Zdziarski, Andrzej A

2014-01-01T23:59:59.000Z

394

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

395

CX-000760: Categorical Exclusion Determination | Department of...  

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

Delivery and Energy Reliability, National Energy Technology Laboratory Develop a low-cost flywheel system and demonstrate a utility-scale installation to provide the...

396

EAC 2012 Storage Report: Progress and Prospects - Recommendations...  

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

for DOE Action (October 17, 2012) More Documents & Publications Fact Sheet: Grid-Scale Flywheel Energy Storage Plant Energy Storage Activities in the United States...

397

Kinetics of liquid phase catalytic dehydration of methanol to dimethyl ether  

SciTech Connect

This paper reports the kinetics of the liquid phase catalytic dehydration of methanol to dimethyl ether investigated. The experiments were carried out under low concentrations of feed in a 1-L stirred autoclave, according to a statistical experimental design. The inert liquid phase used for this investigation was a 78:22 blend of paraffinic and naphthenic mineral oils. A complete thermodynamic analysis was carried out in order to determine the liquid phase concentrations of the dissolved species. A global kinetic model was developed for the rate of dimethyl ether synthesis in terms of the liquid phase concentration of methanol. The activation energy of the reaction was found to be 18,830 cal/gmol. Based on a step-wise linear regression analysis of the kinetic data, the order of the reaction which gave the best fit was 0.28 with respect to methanol.

Gogate, M.R.; Lee, B.G.; Lee, S. (Akron Univ., OH (USA). Dept. of Chemical Engineering); Kulik, C.J. (Electric Power Research Inst., Palo Alto, CA (USA))

1990-01-01T23:59:59.000Z

398

Kinetics of the [beta]-[delta]phase transition in PBX9501.  

SciTech Connect

The initial step in the thermal decomposition of HMX is the solid state phase transition from the centrosymmetric beta form to the noncentrosymmetric delta form. The symmetry change makes the phase transition amenable to the application of second harmonic generation (SHG) as a probe of transition kinetics. We have used SHG to study the temperature dependence of the kinetics for unconfined PBX9501 and HMX. Spatially resolved SHG measurements have shown a nucleation and growth mechanism for the solid state phase transition. We have measured the transition rate as a function of temperature in order to obtain the activation energy and entropy of transition, which determine the phase transition kinetics. Additionally, we have observed temperature dependent reversion of the delta phase to beta phase and have fimd that we can control the reversion rate by controlling the cooling.

Smilowitz, L. B. (Laura B.); Henson, B. F. (Bryan F.); Asay, B. W. (Blaine W.); Dickson, P. M. (Peter M.); Robinson, J. M. (Jeanne M.)

2001-01-01T23:59:59.000Z

399

Kinetic studies of anomalous transport  

SciTech Connect

Progress in achieving a physics-based understanding of anomalous transport in toroidal systems has come in large part from investigations based on the proposition that low frequency electrostatic microinstabilities are dominant in the bulk ( confinement'') region of these plasmas. Although the presence here of drift-type modes dependent on trapped particle and ion temperature gradient driven effects appears to be consistent with a number of important observed confinement trends, conventional estimates for these instabilities cannot account for the strong current (I{sub p}) and /or q-scaling frequently found in empirically deduced global energy confinement times for auxiliary-heated discharges. The present paper deals with both linear and nonlinear physics features, ignored in simpler estimates, which could introduce an appreciable local dependence on current. It is also pointed out that while the thermal flux characteristics of drift modes have justifiably been the focus of experimental studies assessing their relevance, other transport properties associated with these microinstabilities should additionally be examined. Accordingly, the present paper provides estimates and discusses the significance of anomalous energy exchange between ions and electrons when fluctuations are present. 19 refs., 3 figs.

Tang, W.M.

1990-11-01T23:59:59.000Z

400

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

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Unsteady-state kinetic simulation of naphtha reforming and coke combustion processes in the fixed and moving catalyst beds  

Science Journals Connector (OSTI)

Abstract The work is dedicated to the construction of kinetics models for the naphtha reforming process and the adjacent process of catalyst regeneration by coke combustion. The proposed kinetic model for the reforming process is based on the use of common rate equations for the groups of similar reactions with account of difference in reaction rates for individual homologs within these groups by simple correlations with thermodynamic properties (first of all – with the values of Gibbs free energy) of individual reactions and by other simplification methods. Such approach gives the way to construct the kinetics models optimal from the point of view of compromise between accuracy and simplicity. The proposed naphtha reforming model is characterized with the high level of kinetic scheme detailization (62 individual and group reactants and 146 individual reactions), at the same it is rather simple and provides the accurate description of the experimental data using only 22 kinetic parameters. This model is thermodynamically consistent and provides accurate description of experimental data in a wide range of process parameters. Account of catalyst deactivation by coke deposition in the model gives the way to simulate transient reforming process performance both in fixed and moving catalyst beds. Kinetics of coke combustion for catalysts with moderate coke content (up to 3% mass) may described by simple kinetic equation with apparent reaction rate orders closed to unit for relative coke content and to 1/2 for oxygen. Demonstration simulations of naphtha reforming and coke combustion processes are presented.

Andrey N. Zagoruiko; Alexander S. Belyi; Mikhail D. Smolikov; Alexander S. Noskov

2014-01-01T23:59:59.000Z

402

Astrophysical gyrokinetics: kinetic and fluid turbulent cascades in magnetized weakly collisional plasmas  

E-Print Network (OSTI)

We present a theoretical framework for plasma turbulence in astrophysical plasmas (solar wind, interstellar medium, galaxy clusters, accretion disks). The key assumptions are that the turbulence is anisotropic with respect to the mean magnetic field and frequencies are low compared to the ion cyclotron frequency. The energy injected at the outer scale scale has to be converted into heat, which ultimately cannot be done without collisions. A KINETIC CASCADE develops that brings the energy to collisional scales both in space and velocity. Its nature depends on the physics of plasma fluctuations. In each of the physically distinct scale ranges, the kinetic problem is systematically reduced to a more tractable set of equations. In the "inertial range" above the ion gyroscale, the kinetic cascade splits into a cascade of Alfvenic fluctuations, which are governed by the RMHD equations at both the collisional and collisionless scales, and a passive cascade of compressive fluctuations, which obey a linear kinetic equation along the moving field lines associated with the Alfvenic component. In the "dissipation range" between the ion and electron gyroscales, there are again two cascades: the kinetic-Alfven-wave (KAW) cascade governed by two fluid-like Electron RMHD equations and a passive phase-space cascade of ion entropy fluctuations. The latter cascade brings the energy of the inertial-range fluctuations that was damped by collisionless wave-particle interaction at the ion gyroscale to collisional scales in the phase space and leads to ion heating. The KAW energy is similarly damped at the electron gyroscale and converted into electron heat. Kolmogorov-style scaling relations are derived for these cascades. Astrophysical and space-physical applications are discussed in detail.

A. A. Schekochihin; S. C. Cowley; W. Dorland; G. W. Hammett; G. G. Howes; E. Quataert; T. Tatsuno

2007-03-31T23:59:59.000Z

403

Review of electrical energy storage system for vehicular applications  

Science Journals Connector (OSTI)

Abstract Recently, automotive original equipment manufacturers have focused their efforts on developing greener propulsion solutions in order to meet the societal demand and ecological need for clean transportation, so the development of new energy vehicle (NEV) has become a consensus among governments and automotive enterprises. Efficient electrical energy storage system (EESS) appears to be very promising for meeting the rapidly increased requirements of vehicular applications. It is necessary to understand performances of electrical energy storage technologies. Therefore, this paper reviews the various electrical energy storage technologies and their latest applications in vehicle, such as battery energy storage (BES), superconducting magnetic energy storage (SMES), flywheel energy storage (FES), ultra-capacitor (UC) energy storage (UCES) and hybrid energy storage (HES). The research priorities and difficulties of each electrical energy storage technology are also presented and compared. Afterwards, the key technologies of EESS design for vehicles are presented. In addition, several conventional \\{EESSs\\} for vehicle applications are also analyzed; the comparison on advantages and disadvantages of various conventional \\{EESSs\\} is highlighted. From the rigorous review, it is observed that almost all current conventional \\{EESSs\\} for vehicles cannot meet a high-efficiency of power flow over the full operation range; optimization of EESS and improved control strategies will become an important research topic. Finally, this paper especially focuses on a type of linear engine, a brand new automotive propulsion system used for NEV; the guiding principle of EESS design for the new type of linear engine is proposed, an overview of a novel hybrid EESS based on hybrid power source and series–parallel switchover of UC with high efficiency under wide power flow range for the type of linear engine is presented, and advanced features of the novel hybrid EESS are highlighted.

Guizhou Ren; Guoqing Ma; Ning Cong

2015-01-01T23:59:59.000Z

404

Exploring growth kinetics of carbon nanotube arrays by in situ optical diagnostics and modeling  

SciTech Connect

Simple kinetic models of carbon nanotube growth have been able to successfully link together many experimental parameters involved in the growth of carbon nanotubes for practical applications including the prediction of growth rates, terminal lengths, number of walls, activation energies, and their dependences on the growth environment. The implications of recent experiments utilizing in situ monitoring of carbon nanotube growth on our past kinetic model are first reviewed. Then, sub-second pulsed feedstock gas introduction is discussed to explore the nucleation and initial growth of carbon nanotubes in the context of the kinetic model. Moreover, kinetic effects in "pulsed CVD" - using repeated pulsed gas introduction to stop and restart nanotube growth - are explored to understand renucleation, the origin of alignment in nanotube arrays, and incremental growth. Time-resolved reflectivity of the surface is used to remotely understand the kinetics of nucleation and the coordinated growth of arrays. This approach demonstrates that continuous vertically aligned single wall carbon nanotubes can be grown incrementally by pulsed CVD, and that the first exposure of fresh catalyst to feedstock gas is critical to nanotubes site density required for coordinated growth. Aligned nanotube arrays (as short as 60 nm) are shown to nucleate and grow within single, sub-second gas pulses. The multiple-pulse growth experiments (> 100 pulses) show that a high fraction of nanotubes renucleate on subsequent gas pulses.

Puretzky, Alexander A [ORNL] [ORNL; Geohegan, David B [ORNL] [ORNL; Pannala, Sreekanth [ORNL] [ORNL; Rouleau, Christopher [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL)

2014-01-01T23:59:59.000Z

405

Geometry, Heat Removal and Kinetics Scoping Models for Hydrogen Storage Systems  

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

WSRC-TR-2007-00439, REVISION 0 WSRC-TR-2007-00439, REVISION 0 Keywords: Hydrogen Kinetics, Hydrogen Storage Vessel Metal Hydride Retention: Permanent Geometry, Heat Removal and Kinetics Scoping Models for Hydrogen Storage Systems Bruce J. Hardy November 16, 2007 Washington Savannah River Company Savannah River Site Aiken, SC 29808 Prepared for the U.S. Department of Energy Under Contract Number DEAC09-96-SR18500 DISCLAIMER This report was prepared for the United States Department of Energy under Contract No. DE-AC09-96SR18500 and is an account of work performed under that contract. Neither the United States Department of Energy, nor WSRC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for accuracy, completeness, or

406

Kinetics of ion and prompt electron emission from laser-produced plasma  

SciTech Connect

We investigated ion emission dynamics of laser-produced plasma from several elements, comprised of metals and non-metals (C, Al, Si, Cu, Mo, Ta, W), under vacuum conditions using a Faraday cup. The estimated ion flux for various targets studied showed a decreasing tendency with increasing atomic mass. For metals, the ion flux is found to be a function of sublimation energy. A comparison of temporal ion profiles of various materials showed only high-Z elements exhibited multiple structures in the ion time of flight profile indicated by the observation of higher peak kinetic energies, which were absent for low-Z element targets. The slower ions were seen regardless of the atomic number of target material propagated with a kinetic energy of 1–5 keV, while the fast ions observed in high-Z materials possessed significantly higher energies. A systematic study of plasma properties employing fast photography, time, and space resolved optical emission spectroscopy, and electron analysis showed that there existed different mechanisms for generating ions in laser ablation plumes. The origin of high kinetic energy ions is related to prompt electron emission from high-Z targets.

Farid, N. [Center for Materials Under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States) [Center for Materials Under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics and Optical Engineering, Dalian University of Technology, Dalian (China); Harilal, S. S.; Hassanein, A. [Center for Materials Under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)] [Center for Materials Under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Ding, H. [Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics and Optical Engineering, Dalian University of Technology, Dalian (China)] [Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics and Optical Engineering, Dalian University of Technology, Dalian (China)

2013-07-15T23:59:59.000Z

407

Energy Conversion, Mixing Energy, and Neutral Surfaces with a Nonlinear Equation of State  

E-Print Network (OSTI)

Energy Conversion, Mixing Energy, and Neutral Surfaces with a Nonlinear Equation of State JONAS effect) such a neutral displacement is accompanied by a conversion between internal energy E and gravitational potential energy U, and an equal conversion between U and kinetic energy K. While there is thus

Nycander, Jonas

408

Multiple-relaxation-time lattice Boltzmann kinetic model for combustion  

E-Print Network (OSTI)

To probe both the Mechanical Non-Equilibrium (MNE) and Thermodynamic Non-Equilibrium (TNE) in the combustion procedure, a two-dimensional Multiple-Relaxation-Time (MRT) version of the Lattice Boltzmann Kinetic Model(LBKM) for combustion phenomena is presented. The chemical energy released in the progress of combustion is dynamically coupled into the system by adding a chemical term to the LB kinetic equation. The LB model is required to recover the Navier-Stokes equations with chemical reaction in the hydrodynamic limit. To that aim, we construct a discrete velocity model with $24$ velocities divided into $3$ groups. In each group a flexible parameter is used to control the size of discrete velocities and a second parameter is used to describe the contribution of the extra degrees of freedom. The current model works for both subsonic and supersonic flows with or without chemical reaction. In this model both the specific-heat ratio and the Prandtl number are flexible, the TNE effects are naturally presented in...

Xu, Aiguo; Zhang, Guangcai; Li, Yingjun

2014-01-01T23:59:59.000Z

409

MHK Technologies/The Crestwing Wave Energy Converter | Open Energy  

Open Energy Info (EERE)

Crestwing Wave Energy Converter Crestwing Wave Energy Converter < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage The Crestwing Wave Energy Converter.jpg Technology Profile Primary Organization Waveenergyfyn Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 7 8 Open Water System Testing Demonstration and Operation Technology Description The connected pontoons swing around the hinge when the top of the waves passes under the floats The pontoons relative motion is converted into usable energy through a linear PTO system The pontoons are pushed upwards from the below passing wave and again dragged down by the same passing wave Complex hydrodynamic conditions occur under the pontoons when the wave formation pushes the unit up and down simultaneously The energy from waves can be divided into fifty percent potential energy and fifty percent kinetic energy Crestwing absorbs both the potential energy as the kinetic energy which is the back ground for the high efficiency

410

Chemical Kinetics in Support of Syngas Turbine Combustion  

SciTech Connect

This document is the final report on an overall program formulated to extend our prior work in developing and validating kinetic models for the CO/hydrogen/oxygen reaction by carefully analyzing the individual and interactive behavior of specific elementary and subsets of elementary reactions at conditions of interest to syngas combustion in gas turbines. A summary of the tasks performed under this work are: 1. Determine experimentally the third body efficiencies in H+O{sub 2}+M = HO{sub 2}+M (R1) for CO{sub 2} and H{sub 2}O. 2. Using published literature data and the results in this program, further develop the present H{sub 2}/O{sub 2}/diluent and CO/H{sub 2}/O{sub 2}/diluent mechanisms for dilution with CO{sub 2}, H{sub 2}O and N{sub 2} through comparisons with new experimental validation targets for H{sub 2}-CO-O{sub 2}-N{sub 2} reaction kinetics in the presence of significant diluent fractions of CO{sub 2} and/or H{sub 2}O, at high pressures. (task amplified to especially address ignition delay issues, see below). 3. Analyze and demonstrate issues related to NOx interactions with syngas combustion chemistry (task amplified to include interactions of iron pentacarbonyl with syngas combustion chemistry, see below). 4. Publish results, including updated syngas kinetic model. Results are summarized in this document and its appendices. Three archival papers which contain a majority of the research results have appeared. Those results not published elsewhere are highlighted here, and will appear as part of future publications. Portions of the work appearing in the above publications were also supported in part by the Department of Energy under Grant No. DE-FG02-86ER-13503. As a result of and during the research under the present contract, we became aware of other reported results that revealed substantial differences between experimental characterizations of ignition delays for syngas mixtures and ignition delay predictions based upon homogenous kinetic modeling. We adjusted emphasis of Task 2 to understand the source of these noted disparities because of their key importance to developing lean premixed combustion technologies of syngas turbine applications. In performing Task 3, we also suggest for the first time the very significant effect that metal carbonyls may have on syngas combustion properties. This work is fully detailed. The work on metal carbonyl effects is entirely computational in nature. Pursuit of experimental verification of these interactions was beyond the scope of the present work.

Dryer, Frederick

2007-07-31T23:59:59.000Z

411

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

412

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

413

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

414

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

415

Energy Systems High Pressure Test Laboratory (Fact Sheet)  

SciTech Connect

This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Energy Systems High Pressure Test Laboratory at the Energy Systems Integration Facility. The purpose of the Energy Systems High Pressure Test Laboratory at NREL's Energy Systems Integration Facility (ESIF) is to provide space where high pressure hydrogen components can be safely tested. High pressure hydrogen storage is an integral part of energy storage technology for use in fuel cell and in other distributed energy scenarios designed to effectively utilize the variability inherent with renewable energy sources. The high pressure storage laboratory is co-located with energy storage activities such as ultra-capacitors, super conducting magnetic flywheel and mechanical energy storage systems laboratories for an integrated approach to system development and demonstration. Hazards associated with hydrogen storage at pressures up to 10,000 psi include oxygen displacement, combustion, explosion, and pressurization of room air due to fast release and physical hazards associated with burst failure modes. A critical understanding of component failure modes is essential in developing reliable, robust designs that will minimize failure risk beyond the end of service life. Development of test protocol for accelerated life testing to accurately scale to real world operating conditions is essential for developing regulations, codes and standards required for safe operation. NREL works closely with industry partners in providing support of advanced hydrogen technologies. Innovative approaches to product design will accelerate commercialization into new markets. NREL works with all phases of the product design life cycle from early prototype development to final certification testing. High pressure tests are performed on hydrogen components, primarily for the validation of developing new codes and standards for high pressure hydrogen applications. The following types of tests can be performed: Performance, Component and system level efficiency, Strength of materials and hydrogen compatibility, Safety demonstration, Model validation, and Life cycle reliability.

Not Available

2011-10-01T23:59:59.000Z

416

Spectral Cascade and Energy Dissipation in Kinetic Alfven Wave Turbulence  

E-Print Network (OSTI)

zhihongl@uci.edu Department of Physics and Astronomy, University of California, Irvine, California 92697 magnetic field (Bieber, J. W. et al 1996; Podesta, J. J. 2009). Consistent with observations in the solar

Lin, Zhihong

417

Turbulent Vertical Kinetic Energy in the Ocean Mixed Layer  

Science Journals Connector (OSTI)

Vertical velocities in the ocean boundary layer were measured for two weeks at an open ocean, wintertime site using neutrally buoyant floats. Simultaneous measurements of the surface meteorology and surface waves showed a large variability in ...

Eric A. D'Asaro

2001-12-01T23:59:59.000Z

418

Velcro Measurement of Turbulence Kinetic Energy Dissipation Rate ?  

Science Journals Connector (OSTI)

Turbulence in the ocean results from many different processes operating over a wide range of space scales and timescales, with spatial and temporal variability particularly extreme in coastal oceans. If the origins and effects of turbulent ...

Ann E. Gargett

1999-12-01T23:59:59.000Z

419

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...

420

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...

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

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

422

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

423

Walking in simulated reduced gravity: mechanical energy fluctuations and exchange  

E-Print Network (OSTI)

, such that the ratio of horizontal kinetic to gravitational potential energy fluctuations remained constant over a four cycle the kinetic and potential energy are exchanged such that the total external work required to lift to a point mass on massless rigid legs (2, 12, 29). The amount of exchange, often described as ``per- cent

Kram, Rodger

424

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.

425

Probing the disilane adsorption kinetics:?An alternative approach  

Science Journals Connector (OSTI)

The adsorption kinetics and subsequent dissociation of disilane during gas source molecular beam epitaxy on Si(001) surface is studied in situ using modulated beam mass spectrometry, thermal desorption spectroscopy, reflection high energy electron diffraction and growth of epitaxial layers involving repeated cycles of disilane adsorption and hydrogen desorption. The dissociation of disilane molecules is found to occur sequentially and the major intermediate reaction products are SiH2 and SiH. At temperatures above 400 °C, disilane dissociates readily to give two silicon atoms and all six hydrogen atoms and forms the monohydride (2×1)+(1×2) surface. The formation of a Si-monohydride surface also passivates against further adsorption and dissociation of disilane. The main reaction pathway for the decomposition of SiH2 to SiH is identified and studied as a function of incident flux and growth temperature. This process is found to be controlled by the number of unsaturated dangling orbitals.

R. W. Price; E. S. Tok; J. Zhang

1999-02-15T23:59:59.000Z

426

Kinetically determined shapes of grain boundaries in CVD graphene  

E-Print Network (OSTI)

Predicting the shape of grain boundaries is essential to control results of the growth of large graphene crystals. A global energy minimum search predicting the most stable final structure contradicts experimental observations. Here we present Monte Carlo simulation of kinetic formation of grain boundaries (GB) in graphene during collision of two growing graphene flakes. Analysis of the resulting GBs for the full range of misorientation angles $\\alpha$ allowed us to identify a hidden (from post facto analysis such as microscopy) degree of freedom - the edge misorientation angle $\\beta$. Edge misorientation characterizes initial structure rather than final structure and therefore provides more information about growth conditions. Use of $\\beta$ enabled us to explain disagreements between the experimental observations and theoretical work. Finally, we report an analysis of an interesting special case of zero-tilt GBs for which structure is determined by two variables describing the relative shift of initial isl...

Bets, Ksenia V; Yakobson, Boris I

2014-01-01T23:59:59.000Z

427

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

428

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.

429

A Position Sensitive X-ray Spectrophotometer using Microwave Kinetic Inductance Detectors  

E-Print Network (OSTI)

The surface impedance of a superconductor changes when energy is absorbed and Cooper pairs are broken to produce single electron (quasiparticle) excitations. This change may be sensitively measured using a thin-film resonant circuit called a microwave kinetic inductance detector (MKID). The practical application of MKIDs for photon detection requires a method of efficiently coupling the photon energy to the MKID. We present results on position sensitive X-ray detectors made by using two aluminum MKIDs on either side of a tantalum photon absorber strip. Diffusion constants, recombination times, and energy resolution are reported. MKIDs can easily be scaled into large arrays.

Benjamin A. Mazin; Megan E. Eckart; Bruce Bumble; Sunil Golwala; Peter K. Day; Jonas Zmuidzinas; Fiona A. Harrison

2006-10-04T23:59:59.000Z

430

Energy-based analysis of biochemical cycles using bond graphs  

Science Journals Connector (OSTI)

...encouragement to embark on a new research direction...Hill, TL . 1989 Free energy transduction and biochemical cycle kinetics. New York, NY: Springer...cellular systems. New York, NY: Chapman Hall...D . 1977 Power and energy in linearized physical...

2014-01-01T23:59:59.000Z

431

Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors  

SciTech Connect

This document is the final report for Cooperative Agreement DE-FC26-04NT42314, 'Kinetics Study of Mercury Reactions in FGD Liquors'. The project was co-funded by the U.S. DOE National Energy Technology Laboratory and EPRI. The objective of the project has been to determine the mechanisms and kinetics of the aqueous reactions of mercury absorbed by wet flue gas desulfurization (FGD) systems, and develop a kinetics model to predict mercury reactions in wet FGD systems. The model may be used to determine optimum wet FGD design and operating conditions to maximize mercury capture in wet FGD systems. Initially, a series of bench-top, liquid-phase reactor tests were conducted and mercury species concentrations were measured by UV/visible light spectroscopy to determine reactant and byproduct concentrations over time. Other measurement methods, such as atomic absorption, were used to measure concentrations of vapor-phase elemental mercury, that cannot be measured by UV/visible light spectroscopy. Next, a series of bench-scale wet FGD simulation tests were conducted. Because of the significant effects of sulfite concentration on mercury re-emission rates, new methods were developed for operating and controlling the bench-scale FGD experiments. Approximately 140 bench-scale wet FGD tests were conducted and several unusual and pertinent effects of process chemistry on mercury re-emissions were identified and characterized. These data have been used to develop an empirically adjusted, theoretically based kinetics model to predict mercury species reactions in wet FGD systems. The model has been verified in tests conducted with the bench-scale wet FGD system, where both gas-phase and liquid-phase mercury concentrations were measured to determine if the model accurately predicts the tendency for mercury re-emissions. This report presents and discusses results from the initial laboratory kinetics measurements, the bench-scale wet FGD tests, and the kinetics modeling efforts.

Gary Blythe; John Currie; David DeBerry

2008-03-31T23:59:59.000Z

432

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...

433

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

434

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

435

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

436

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

437

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

438

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

439

Non-Equilibrium Superconductivity in Kinetic Inductance Detectors for THz Photon Sensing  

E-Print Network (OSTI)

Low temperature Kinetic Inductance Detectors (KIDs) are attractive candidates for producing quantumsensitive, arrayable sensors for astrophysical and other precision measurement applications. The readout uses a low frequency probe signal with quanta of energy well-below the threshold for pair-breaking in the superconductor. We have calculated the detailed non-equilibrium quasiparticle and phonon energy spectra generated by the probe signal of the KID when operating well-below its superconducting transition temperature Tc within the framework of the coupled kinetic equations described by Chang and Scalapino.[1] At the lowest bath temperature studied Tb/Tc = 0.1 the quasiparticle distributions can be driven far from equilibrium. In addition to the low frequency probe signal we have incorporated a high frequency (~ 1 THz) source signal well-above the pair-breaking threshold of the superconductor. Calculations of source signal detection efficiency are discussed

Goldie, D J

2014-01-01T23:59:59.000Z

440

Secretary Chu Announces $620 Million for Smart Grid Demonstration...  

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

projects include advanced battery systems (including flow batteries), flywheels, and compressed air energy systems. View the full list of selected projects. Media contact(s):...

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Microsoft Word - 2014.09 EAC 2014 Storage Plan Assessment Recommendati...  

Office of Environmental Management (EM)

system research, new nano-structured flywheel and magnet materials; 2. Compressed Air Energy Storage (CAES): proof-of-concept isothermal CAES research; 3. Electrochemical:...

442

Network Analysis of Photovoltaic Energy Conversion  

Science Journals Connector (OSTI)

Photovoltaic energy conversion in photovoltaic cells has been analyzed by the detailed balance approach or by thermodynamic arguments. Here we introduce a network representation to analyze the performance of such systems once a suitable kinetic model (...

Mario Einax; Abraham Nitzan

2014-11-03T23:59:59.000Z

443

Energy Analysis of Convectively Induced Wind Perturbations  

Science Journals Connector (OSTI)

Budgets of divergent and rotational components of kinetic energy (KD and KR) are examined for four upper level wind speed maxima that develop during the fourth Atmospheric Variability Experiment (AVE IV) and the first AVE-Severe Environmental ...

Henry E. Fuelberg; Dennis E. Buechler

1989-04-01T23:59:59.000Z

444

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

445

Evidence for energy savings from aerial running in the Svalbard rock ptarmigan (Lagopus muta hyperborea)  

Science Journals Connector (OSTI)

...nonsensical result. Energy savings during aerial...attributed to elastic storage mechanisms [4...horizontal kinetic energy of the COM. Figure-3...and (d) stride frequency = 1.499 + 1...C. Prefaut 1994 Energy expenditure and cardiorespiratory responses at the transition...

2011-01-01T23:59:59.000Z

446

Energy Analysis and Public Policy  

Science Journals Connector (OSTI)

...kinetic energy of the wind or tides (in the case...within the ecosystem or wind flow through it were...more concentrated than wind energy (12). Since...years. Steam-driven turbines Resource flow Dry steam...what depth onshore and offshore will oil and natural...

Martha W. Gilliland

1975-09-26T23:59:59.000Z

447

Divergent–rotational Nonlinear Energy Conversions in Wavenumber–frequency Domain During Summer Monsoon  

Science Journals Connector (OSTI)

...—This work deals with computational modelling designed to understand the dynamical mechanism of low frequency monsoonal transients that results from nonlinear divergent–rotational (?-?) kinetic energy (KE) conversions

D. R. Chakraborty; N. K. Agarwal

2000-10-01T23:59:59.000Z

448

E-Print Network 3.0 - acid energy percentage Sample Search Results  

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

Renewable Energy ; Engineering 45 A Kinetic Study on the Decomposition of 5-Hydroxymethylfurfural into Summary: -Hydroxymethylfurfural into Levulinic Acid 3.7 References 1...

449

Coalescence kinetics in surfactant stabilized emulsions: Evolution equations from direct numerical simulations  

SciTech Connect

Lattice Boltzmann simulations were used to study the coalescence kinetics in emulsions with amphiphilic surfactant, under neutrally buoyant conditions, and with a significant kinematic viscosity contrast between the phases (emulating water in oil emulsions). The 3D simulation domain was large enough (256 3rd power -- 10 7th power grid points) to obtain good statistics with droplet numbers ranging from a few thousand at early times to a few hundred near equilibrium. Increased surfactant contents slowed down the coalescence rate between droplets due to the Gibbs-Marangoni effect, and the coalescence was driven by a quasi-turbulent velocity field. The kinetic energy decayed at a relatively slow rate at early times, due to conversion of interfacial energy to kinetic energy in the flow during coalescence. Phenomenological, coupled differential equations for the mean droplet diameter D(t) and the number density nd(t) were obtained from the simulation data and from film draining theories. Local (in time) power law exponents for the growth of the mean diameter (and for the concomitant decrease of nd) were established in terms of the instantaneous values of the kinetic energy, coalescence probability, Gibbs elasticity, and interfacial area. The model studies indicated that true power laws for the growth of the droplet size and decrease of the number of droplets with time may not be justified, since the exponents derived using the phenomenological model were time dependent. In contrast to earlier simulation results for symmetric blends with surfactant, we found no evidence for stretched logarithmic scaling of the formD -- [ln (ct)]a for the morphology length, or exponential scalings associated with arrested growth, on the basis of the phenomenological model.

R. Skartlien; E. Sollum; A. Akselsen; P. Meakin; B. Grimes; J. Sjoblom

2012-12-01T23:59:59.000Z

450

Thermodynamics and Kinetics of a Go Proteinlike Heteropolymer Model with Two-State Folding Characteristics  

E-Print Network (OSTI)

We present results of Monte Carlo computer simulations of a coarse-grained hydrophobic-polar Go-like heteropolymer model and discuss thermodynamic properties and kinetics of an exemplified heteropolymer, exhibiting two-state folding behavior. It turns out that general, characteristic folding features of realistic proteins with a single free-energy barrier can also be observed in this simplified model, where the folding transition is primarily driven by the hydrophobic force.

Anna Kallias; Michael Bachmann; Wolfhard Janke

2007-12-06T23:59:59.000Z

451

Florida's 8th congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Florida. Florida. US Recovery Act Smart Grid Projects in Florida's 8th congressional district Intellon Corporation Smart Grid Project Registered Energy Companies in Florida's 8th congressional district Alternative Concepts and Technology Florida Power Electronics Center FPEC Florida Solar Energy Center (Building America Partnership for Improved Residential Construction FuelClinic Iosil Energy Corporation Kinetic Energy Systems Planar Energy Devices Energy Generation Facilities in Florida's 8th congressional district Space Coast Next Generation Solar Energy Center Solar Power Plant Retrieved from "http://en.openei.org/w/index.php?title=Florida%27s_8th_congressional_district&oldid=182793" Categories: Places Stubs Congressional Districts What links here Related changes

452

Slide 1  

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

Energy Storage Systems Program of the U.S. Department Of Energy through Pacific Energy Storage Systems Program of the U.S. Department Of Energy through Pacific Northwest National Laboratories EES technologies and PNNL focus Electrical energy Electrical charges: Capacitors Potential energy: pump hydro, compress air Kinetic energy: flywheels Chemical energy: batteries Direct Storage in charges Indirect storage via energy conversion PNNL strategy in stationary EES R&D EES R&D at PNNL EES Technologies Novel redox flow batteries, MWhs New gen Na-batteries, up to MWhs Low cost, long life Li-ion, community storage ... Crosscutting science Advanced diagnostic study, NMR, TEM, etc. Electrochemical study * Mass/charge transport * Electrical fields * Flow, thermal, ... * Basic chemistry * Materials structure * Physical properties * Electrochemical activity * Reaction kinetics

453

Tidal Energy Research  

SciTech Connect

This technical report contains results on the following topics: 1) Testing and analysis of sub-scale hydro-kinetic turbines in a flume, including the design and fabrication of the instrumented turbines. 2) Field measurements and analysis of the tidal energy resource and at a site in northern Puget Sound, that is being examined for turbine installation. 3) Conceptual design and performance analysis of hydro-kinetic turbines operating at high blockage ratio, for use for power generation and flow control in open channel flows.

Stelzenmuller, Nickolas [Univ of Washington; Aliseda, Alberto [Univ of Washington; Palodichuk, Michael [Univ of Washington; Polagye, Brian [Univ of Washington; Thomson, James [Univ of Washington; Chime, Arshiya [Univ of Washington; Malte, Philip [Univ of washington

2014-03-31T23:59:59.000Z

454

Kinetic Modeling of Toluene Oxidation for Surrogate Fuel Applications  

SciTech Connect

New environmental issues, like the effect of combustion-generated greenhouse gases, provide motivation to better characterize oxidation of hydrocarbons. Transportation, in particular, significantly contributes to energy consumption and CO{sub 2} emissions. Kinetic studies about the combustion of fuels under conditions typical of internal combustion engines provides important support to improve mechanism formulation and to eventually provide better computational tools that can be used to increase the engine performance. It is foreseeable that at least in the next 30 years the main transportation fuels will be either gasoline or diesel. Unfortunately, these fuels are very complex mixtures of many components. Moreover, their specifications and performance requirements significantly change the composition of these fuels: gasoline and diesel mixtures are different if coming from different refineries or they are different from winter to summer. At the same time a fuel with a well defined and reproducible composition is needed for both experimental and modeling work. In response to these issues, surrogate fuels are proposed. Surrogate fuels are defined as mixtures of a small number of hydrocarbons whose relative concentrations is adjusted in order to approximate the chemical and physical properties of a real fuel. Surrogate fuels are then very useful both for the design of reproducible experimental tests and also for the development of reliable kinetic models. The primary reference fuels (PRF) are a typical and old example of surrogate fuel: n-heptane and iso-octane mixtures are used to reproduce antiknock propensity of complex mixtures contained in a gasoline. PRFs are not able to surrogate gasoline in operating conditions different from standard ones and new surrogates have been recently proposed. Toluene is included in all of them as a species able to represent the behavior of aromatic compounds. On the other side, the toluene oxidation chemistry is not so well established and uncertainties still remain in the mechanism. This is especially true in the low temperature regime (< 850K). In these conditions, the toluene reactivity is too low to be conveniently investigated. Nonetheless, gasoline surrogates work in the engine at low temperatures, because of the presence of very reactive alkanes. The effect of these component interactions have to be taken into account. This work's aim is to present the model activity carried out by two different research groups, comparing the main pathways and results, matching data carried out in different devices both for pure toluene and mixtures. This is the starting point for a further activity to improve the two kinetic schemes.

Frassoldati, A; Mehl, M; Fietzek, R; Faravelli, T; Pitz, W J; Ranzi, E

2009-04-21T23:59:59.000Z

455

PUBLISHED ONLINE: 8 APRIL 2012 | DOI: 10.1038/NPHYS2278 Observation of the kinetic condensation of  

E-Print Network (OSTI)

phases can condense in a formally identical manner6­9 . In complete analogy with gas kinetics, particle­5 . This transition is characterized by a macroscopic occupation of the ground state. The quantum nature of the bosons, turbulent wave mixing leads to a self-organized redistribution of energy: an inverse cascade increases

Loss, Daniel

456

Peer Review Oct 2005  

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

Peer Review Sept , 2008 Peer Review Sept , 2008 Design, Fabrication, and Test of a 5 kWh Flywheel Energy Storage System Utilizing a High Temperature Superconducting Magnetic Bearing - Phase III Boeing Technology | Phantom Works Superconducting Flywheel Development 2 Copyright © 2004 Boeing. All rights reserved. Flywheel Energy Storage Systems Objective: *Design, build and deliver flywheel energy storage systems utilizing high temperature superconducting (HTS) bearings tailored for uninterruptible power systems and off-grid applications Goal: *Successfully integrate FESS into a demonstration site through cooperative agreements with DOE and contracts with Sandia National Labs Deployment of a demo system, shown in relation to diesel genset and balance of system. Over All Status:

457

Questions and Answers - Do rotating magnets create energy? Where can I find  

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

If energy is formed by a generator,how does it form the energy? If energy is formed by a generator,<br>how does it form the energy? Previous Question (If energy is formed by a generator, how does it form the energy?) Questions and Answers Main Index Next Question (What is the fastest type of energy?) What is the fastest type of energy? Do rotating magnets create energy? Where can I find more information on this subject? The first law of thermodynamics is that matter/energy cannot be "created" or destroyed. We can convert energy from one form to another. For instance, in a car, we convert chemical energy (actually the binding energy of electrons) to heat, which in turn is converted to kinetic energy (motion). Your question has a similar answer. When you rotate a magnet, you are using kinetic energy to move it. This kinetic energy can be converted to

458

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

459

Parameter estimation for models of ligninolytic and cellulolytic enzyme kinetics  

SciTech Connect

While soil enzymes have been explicitly included in the soil organic carbon (SOC) decomposition models, there is a serious lack of suitable data for model parameterization. This study provides well-documented enzymatic parameters for application in enzyme-driven SOC decomposition models from a compilation and analysis of published measurements. In particular, we developed appropriate kinetic parameters for five typical ligninolytic and cellulolytic enzymes ( -glucosidase, cellobiohydrolase, endo-glucanase, peroxidase, and phenol oxidase). The kinetic parameters included the maximum specific enzyme activity (Vmax) and half-saturation constant (Km) in the Michaelis-Menten equation. The activation energy (Ea) and the pH optimum and sensitivity (pHopt and pHsen) were also analyzed. pHsen was estimated by fitting an exponential-quadratic function. The Vmax values, often presented in different units under various measurement conditions, were converted into the same units at a reference temperature (20 C) and pHopt. Major conclusions are: (i) Both Vmax and Km were log-normal distributed, with no significant difference in Vmax exhibited between enzymes originating from bacteria or fungi. (ii) No significant difference in Vmax was found between cellulases and ligninases; however, there was significant difference in Km between them. (iii) Ligninases had higher Ea values and lower pHopt than cellulases; average ratio of pHsen to pHopt ranged 0.3 0.4 for the five enzymes, which means that an increase or decrease of 1.1 1.7 pH units from pHopt would reduce Vmax by 50%. (iv) Our analysis indicated that the Vmax values from lab measurements with purified enzymes were 1 2 orders of magnitude higher than those for use in SOC decomposition models under field conditions.

Wang, Gangsheng [ORNL; Post, Wilfred M [ORNL; Mayes, Melanie [ORNL; Frerichs, Joshua T [ORNL; Jagadamma, Sindhu [ORNL

2012-01-01T23:59:59.000Z

460

MHK Technologies/WavePlane | Open Energy Information  

Open Energy Info (EERE)

WavePlane WavePlane < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage WavePlane.jpg Technology Profile Primary Organization WavePlane A S Project(s) where this technology is utilized *MHK Projects/WavePlane Prototype 1 Technology Resource Click here Wave Technology Type Click here Overtopping Device Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The WavePlane is a V-shaped design, which is anchored with the head up against the incoming waves. Below the waterline the device is fitted with an artificial beach, which is designed to improve the capture of wave energy. The WavePlane is symmetrical in its construction. Each side captures the water from the waves of various heights. The device splits the oncoming waves with a series of intakes, known as lamellas, which guide the captured water into a 'flywheel tube.' The fast moving vortex that is formed then forces the water across two turbines, which are located at the ends of the two 'V-shaped legs'. Finally the water is discharged back into the ocean.

Note: This page contains sample records for the topic "kinetics flywheel energy" 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

Beilstein-Institut Reflections on Energy Conversion in  

E-Print Network (OSTI)

Beilstein-Institut Reflections on Energy Conversion in Biological and Biomimetic Systems Athel by conversion of the heat into work, chemical energy or electrical power, and the inevitable energy losses 2011 Abstract In principle any form of energy (light, electrical, potential, chemical, kinetic energy

462

Thermochemical Kinetics for Multireference Systems: Addition Reactions of Ozone  

SciTech Connect

The 1,3-dipolar cycloadditions of ozone to ethyne and ethene provide extreme examples of multireference singlet-state chemistry, and they are examined here to test the applicability of several approaches to thermochemical kinetics of systems with large static correlation. Four different multireference diagnostics are applied to measure the multireference characters of the reactants, products, and transition states; all diagnostics indicate significant multireference character in the reactant portion of the potential energy surfaces. We make a more complete estimation of the effect of quadruple excitations than was previously available, and we use this with CCSDT/CBS estimation of Wheeler et al. (Wheeler, S. E.; Ess, D. H.; Houk, K. N. J. Phys. Chem. A 2008, 112, 1798.) to make new best estimates of the van der Waals association energy, the barrier height, and the reaction energy to form the cycloadduct for both reactions. Comparing with these best estimates, we present comprehensive mean unsigned errors for a variety of coupled cluster, multilevel, and density functional methods. Several computational aspects of multireference reactions are considered: (i) the applicability of multilevel theory, (ii) the convergence of coupled cluster theory for reaction barrier heights, (iii) the applicability of completely renormalized coupled cluster methods to multireference systems, (iv) the treatment by density functional theory, (v) the multireference perturbation theory for multireference reactions, and (vi) the relative accuracy of scaling-type multilevel methods as compared with additive ones. It is found that scaling-type multilevel methods do not perform better than the additive-type multilevel methods. Among the 48 tested density functionals, only M05 reproduces the best estimates within their uncertainty. Multireference perturbation theory based on the complete-active-space reference wave functions constructed using a small number of reaction-specific active orbitals gives accurate forward barrier heights; however, it significantly underestimates reaction energies.

Zhao, Yan; Tishchenko, Oksana; Gour, Jeffrey R.; Li, Wei; Lutz, Jesse; Piecuch, Piotr; Truhlar, Donald G.

2009-05-14T23:59:59.000Z

463

Astrophysical Gyrokinetics: Kinetic and Fluid Turbulent Cascades In Magentized Weakly Collisional Plasmas  

SciTech Connect

This paper presents a theoretical framework for understanding plasma turbulence in astrophysical plasmas. It is motivated by observations of electromagnetic and density fluctuations in the solar wind, interstellar medium and galaxy clusters, as well as by models of particle heating in accretion disks. All of these plasmas and many others have turbulentmotions at weakly collisional and collisionless scales. The paper focuses on turbulence in a strong mean magnetic field. The key assumptions are that the turbulent fluctuations are small compared to the mean field, spatially anisotropic with respect to it and that their frequency is low compared to the ion cyclotron frequency. The turbulence is assumed to be forced at some system-specific outer scale. The energy injected at this scale has to be dissipated into heat, which ultimately cannot be accomplished without collisions. A kinetic cascade develops that brings the energy to collisional scales both in space and velocity. The nature of the kinetic cascade in various scale ranges depends on the physics of plasma fluctuations that exist there. There are four special scales that separate physically distinct regimes: the electron and ion gyroscales, the mean free path and the electron diffusion scale. In each of the scale ranges separated by these scales, the fully kinetic problem is systematically reduced to a more physically transparent and computationally tractable system of equations, which are derived in a rigorous way. In the "inertial range" above the ion gyroscale, the kinetic cascade separates into two parts: a cascade of Alfvenic fluctuations and a passive cascade of density and magnetic-fieldstrength fluctuations. The former are governed by the Reduced Magnetohydrodynamic (RMHD) equations at both the collisional and collisionless scales; the latter obey a linear kinetic equation along the (moving) field lines associated with the Alfvenic component (in the collisional limit, these compressive fluctuations become the slow and entropy modes of the conventional MHD). In the "dissipation range" below ion gyroscale, there are again two cascades: the kinetic-Alfven-wave (KAW) cascade governed by two fluid-like Electron Reduced Magnetohydrodynamic (ERMHD) equations and a passive cascade of ion entropy fluctuations both in space and velocity. The latter cascade brings the energy of the inertial-range fluctuations that was Landau-damped at the ion gyroscale to collisional scales in the phase space and leads to ion heating. The KAWenergy is similarly damped at the electron gyroscale and converted into electron heat. Kolmogorov-style scaling relations are derived for all of these cascades. The relationship between the theoretical models proposed in this paper and astrophysical applications and observations is discussed in detail.

A.A. Schekochihin, S.C. Cowley, W. Dorland, G.W. Hammett, G.G. Howes, E. Quataert, and T. Tatsuno

2009-04-23T23:59:59.000Z

464

Gasification characteristics and kinetics for an Eastern oil shale  

SciTech Connect

Gasification reactivity of an Eastern oil shale was studied in a three-year research project under a cooperative agreement between the Department of Energy, Morgantown Energy Technology Center, and HYCRUDE Corp. to expand the data base on the hydroretorting of Eastern oil shales. Gasification tests were conducted with the Indiana New Albany oil shale during the first year of the program. A total of six Eastern oil shales are planned to be tested during the program. A laboratory thermobalance and a 2-inch diameter fluidized bed were used to conduct gasification tests with Indiana New Albany oil shale. Temperature and pressure ranges used were 1600 to 1900/sup 0/F and 15 to 500 psig, respectively. Fifteen thermobalance tests were made in hydrogen/steam and synthesis gas/steam mixtures. Six fluidized-bed tests were made in the same synthesis gas/steam mixture. Carbon conversions as high as 95% were achieved. Thermobalance test results and a kinetic description of weight loss during hydrogen/steam gasification are presented. 14 refs., 6 figs., 4 tabs.

Lau, F.S.; Rue, D.M.; Punwani, D.V.; Rex, R.C. Jr.

1987-01-01T23:59:59.000Z

465

ARPA-E 2013 | Department of Energy  

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

ARPA-E 2013 ARPA-E 2013 ARPA-E 2013 Addthis The Technology Showcase: AC Kinetics 1 of 11 The Technology Showcase: AC Kinetics The Technology Showcase at the 2013 ARPA-E Energy Innovation Summit presents America's next generation of transformational energy technologies. In this photo, motor control company AC Kinetics, Inc. highlighted its next-generation motor control technology on the showcase floor. Image: Sarah Gerrity, Energy Department Date taken: 2013-02-26 11:49 The Technology Showcase: AutoGrid 2 of 11 The Technology Showcase: AutoGrid The Technology Showcase at the 2013 ARPA-E Energy Innovation Summit presents America's next generation of transformational energy technologies. AutoGrid, a California-based energy start-up, aims to take two-way-communicating smart thermostats from different vendors and turn

466

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

467

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

468

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

469

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

470

Energy Programs at the Johns Hopkins University Applied Physics Laboratory, Quarterly Report, October-December 1980  

SciTech Connect

The Johns Hopkins University Applied Physics Laboratory is engaged in developing energy resources, utilization concepts, and monitoring and storage methods. This Quarterly Report summarizes the work on the various tasks as of 31 December 1980. The Energy Quarterly Report is divided into five sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Division of Geothermal Energy (DOE/DGE), contains reports on the progress of geothermal-related tasks on which effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, supported by the Department of Energy/Resource Applications (DOE/RA), contains a report on institutional problems for small-scale hydroelectric power development in the southeastern states and a list of documents published by APL in the hydroelectric program and in the geothermal program, above. The third section, Seismotectonic Investigations, contains an article on work on the geologic structure of the Danbury Quadrangle that is supported by the Reactor Safety Research Division of the Nuclear Regulatory Commission (NRC) and an in-house supported study on a new method for assessing earthquakes in intraplate regions. The fourth section, Energy Conversion and Storage Techniques, contains four articles. The first is an evaluation of the Einstein refrigerator, supported by independent IR and D funds. The second concerns fly-wheel technology development at APL supported by the Department of Energy, Division of Energy Storage (DOE/STOR). The third is a report on APL energy conservation efforts at its own buildings, and the fourth is an article on liquefied natural gas (LNG) safety evaluation, supported by the National Academy of Sciences. The fifth section explores the value of establishing an Energy Research Institute at The Johns Hopkins University.

None

1980-12-01T23:59:59.000Z

471

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

472

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

473

3.205 Thermodynamics and Kinetics of Materials, Fall 2003  

E-Print Network (OSTI)

Laws of thermodynamics applied to materials and materials processes. Solution theory. Equilibrium diagrams. Overview of fluid transport processes. Kinetics of processes that occur in materials, including diffusion, phase ...

Allen, Samuel M.

474

Simulations of Kinetic Events at the Atomic Scale  

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

Presentation on the Simulations of Kinetic Events at the Atomic Scale given at the DOE Theory Focus Session on Hydrogen Storage Materials on May 18, 2006.

475

Kinetics, Mechanics and Microstructure Changes in Storage Media  

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

Focus Session on Hydrogen Storage DOE Hydrogen Program Review Crystal Gateway Marriott, Crystal City, VA May 18, 2006 Kinetics, Mechanics and Microstructure Changes in Storage...

476

Kinetics, Mechanics and Microstructure Changes in Storage Media  

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

Presentation on the Kinetics, Mechanics and Microstructure Changes in Storage Media given at the DOE Theory Focus Session on Hydrogen Storage Materials on May 18, 2006.

477

Method for converting heat energy to mechanical energy with monochlorotetrafluoroethane  

SciTech Connect

Monochlorotetrafluoroethane is useful as a power fluid with particular suitability for large scale Rankine cycle applications based on systems with moderate temperature heat sources. The fluid is utilized in a Rankine cycle application by vaporizing the fluid by passing the same in heat exchange relationship with a heat source and utilizing the kinetic energy of the resulting expanding vapors to perform work. In this manner heat energy is converted to mechanical energy.

Allen, R.A.; Murphy, K.P.; Stiel, L.I.

1980-09-30T23:59:59.000Z

478

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 electrolytes as well as due to the defective properties of the mucin polymer network.

S. Sircar; A. J. Roberts

2015-01-20T23:59:59.000Z

479

Acifluorfen Sorption and Sorption Kinetics in Soil  

Science Journals Connector (OSTI)

The time-dependent increase in sorbed acifluorfen up to 48 h was described by a two-site equilibrium/kinetic model where Si is sorbed concentration (?mol kg-1), C is solution concentration (?M), ke (L kg-1) is the coefficient for sorption at sites 1 exhibiting instantaneous equilibrium, kf (L kg-1 h-1) and kr (h-1) are rate constants for sorption and desorption, respectively, from sites 2, 1/N accounts for sorption nonlinearity, and t (h) is time. ... Alternatively, acifluorfen degradation and time-dependent sorption of metabolites may be qualitatively described by assuming first-order kinetics: where P is the solution concentration of all metabolic products (?M), SP is concentration of sorbed metabolite (?mol kg-1), kd (h-1) and kp (h-1) are first-order rate constants for substrate degradation and metabolite sorption, respectively, v is solution volume (L), and m is sorbent mass (kg). ... All sorption isotherms were nonlinear and exponent (1/N) values less than 1 (Table 1), indicating decreasing fraction sorbed with increasing initial acifluorfen concentration. ...

Martin A. Locke; Lewis A. Gaston; Robert M. Zablotowicz

1997-01-20T23:59:59.000Z

480

Direct Kinetic Measurements of a Criegee Intermediate  

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

Direct Kinetic Measurements of a Criegee Intermediate Print Direct Kinetic Measurements of a Criegee Intermediate Print In the earth's troposphere, which blankets the planet surface where we live and breathe, dust particles, gas molecules, water vapor, and sunlight provide the ingredients for a multitude of chemical reactions that can generate effects ranging from clouds and smog to acid rain and climate change. In 1949, chemist Rudolf Criegee proposed a novel chemical pathway for one such reaction, known as ozonolysis: the destruction of alkenes (a type of hydrocarbon), via reaction with ozone, a key pollutant in the troposphere. Although there has been much indirect evidence supporting Criegee's mechanism, breakthrough research done at the ALS by chemists from Sandia National Laboratories, the University of Manchester, and Bristol University has for the first time directly measured reaction rates for so-called "Criegee intermediates," elusive molecules formed at intermediate stages of ozonolysis. The surprising results may have important implications for subjects ranging from advanced engine design to air quality and climate modeling.

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481

In-Flight Performance of the Balloon-Borne High Energy Focusing Telescope C. M. Hubert Chena  

E-Print Network (OSTI)

encoders ¯ Motor for elevation control; flywheels for yaw and roll The Flight HEFT was launched at 19 rectangular grids show the extent of the detectors. The blue curve shows the trajectory of the target centroid

482

CLEERS Coordination & Joint Development of Benchmark Kinetics...  

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

of Energy Technical Highlights SCR 13 Managed by UT-Battelle for the U.S. Department of Energy Protocol data show wide operating window for fresh commercial Cu zeolite * Cu...

483

Cosmic steps in modeling dark energy  

Science Journals Connector (OSTI)

Past and recent data analyses gave some hints of steps in dark energy. Considering dark energy as a dynamical scalar field, we investigate several models with various steps: a step in the scalar potential, a step in the kinetic term, a step in the energy density, and a step in the equation-of-state parameter w. These toy models provide a workable mechanism to generate steps and features of dark energy. Remarkably, a single real scalar can cross w=-1 dynamically with a step in the kinetic term.

Tower Wang

2009-11-17T23:59:59.000Z

484

Quantum potential energy as concealed motion  

E-Print Network (OSTI)

It is known that the Schroedinger equation may be derived from a hydrodynamic model in which the Lagrangian position coordinates of a continuum of particles represent the quantum state. Using Routh\\s method of ignorable coordinates it is shown that the quantum potential energy of particle interaction that represents quantum effects in this model may be regarded as the kinetic energy of additional concealed freedoms. The method brings an alternative perspective to Planck\\s constant, which plays the role of a hidden variable, and to the canonical quantization procedure, since what is termed kinetic energy in quantum mechanics may be regarded literally as energy due to motion.

Peter Holland

2014-11-13T23:59:59.000Z

485

Vapor-deposited non-crystalline phase vs ordinary glasses and supercooled liquids: evidence for significant thermodynamic and kinetic differences  

E-Print Network (OSTI)

Vapor deposition of molecules on a substrate often results in glassy materials of high kinetic stability and low enthalpy. The extraordinary properties of such glasses are attributed to high rates of surface diffusion during sample deposition, which makes it possible for constituents to find a configuration of much lower energy on a typical laboratory time scale1,2,7. The exact structure of the resulting phase is often assumed to be identical to that obtained by aging of ordinary glass over exceedingly long times. Using Fast Scanning Calorimetry technique, we show that out-of-equilibrium relaxation kinetics and possibly the enthalpy of vapor-deposited films of toluene, an archetypical fragile glass former, are distinct from those of ordinary supercooled phase even when the deposition takes place at temperatures above the glass softening. These observations provide support to the conjecture that the vapor-deposition may result in formation of non-crystalline phase of unique structural, thermodynamic, and kinetic properties.

Deepanjan Bhattacharya; Vlad Sadtchenko

2014-10-31T23:59:59.000Z

486

To print this page, select File then Print from your browser URL: http://www.hgtvpro.com/hpro/nws_ind_nws_trends/article/0,2624,HPRO_26519_6023943,00.html  

E-Print Network (OSTI)

Flywheel Energy Storage Silva Cell Subsurface Tree Protection and Stormwater System Mobile Solar Power is particularly diverse, ranging from a recycled-content concrete block, to a flywheel energy storage system for schools. Energy-saving products among the Top-10 include a line of mineral wool insulation, an integrated

487

Adaptive kinetic Monte Carlo simulation of methanol decomposition on Cu(100)  

SciTech Connect

The adaptive kinetic Monte Carlo method was used to calculate the dynamics of methanol decomposition on Cu(100) at room temperature over a time scale of minutes. Mechanisms of reaction were found using min-mode following saddle point searches based upon forces and energies from density functional theory. Rates of reaction were calculated with harmonic transition state theory. The dynamics followed a pathway from CH3-OH, CH3-O, CH2-O, CH-O and finally C-O. Our calculations confirm that methanol decomposition starts with breaking the O-H bond followed by breaking C-H bonds in the dehydrogenated intermediates until CO is produced. The bridge site on the Cu(100) surface is the active site for scissoring chemical bonds. Reaction intermediates are mobile on the surface which allows them to find this active reaction site. This study illustrates how the adaptive kinetic Monte Carlo method can model the dynamics of surface chemistry from first principles.

Xu, Lijun; Mei, Donghai; Henkelman, Graeme A.

2009-12-31T23:59:59.000Z

488

Dielectric function beyond the random-phase approximation: Kinetic theory versus linear response theory  

Science Journals Connector (OSTI)

Calculating the frequency-dependent dielectric function for strongly coupled plasmas, the relations within kinetic theory and linear response theory are derived and discussed in comparison. In this context, we give a proof that the Kohler variational principle can be extended to arbitrary frequencies. It is shown to be a special case of the Zubarev method for the construction of a nonequilibrium statistical operator from the principle of the extremum of entropy production. Within kinetic theory, the commonly used energy-dependent relaxation time approach is strictly valid only for the Lorentz plasma in the static case. It is compared with the result from linear response theory that includes electron-electron interactions and applies for arbitrary frequencies, including bremsstrahlung emission. It is shown how a general approach to linear response encompasses the different approximations and opens options for systematic improvements.

H. Reinholz and G. Röpke

2012-03-08T23:59:59.000Z