214 Matching Results

Search Results

Results: 1 - 24 next
open access

Climate Change Mitigation and Green Growth in Developing Asia

Description: Developing Asia is the driver of today’s emissions intensive global economy. As the principal source of future emissions, the region is critical to the task of global climate change mitigation. Reflecting this global reality and a range of related domestic issues, the governments of the People’s Republic of China, India, Indonesia, Thailand, and Viet Nam have embarked upon an ambitious policy agenda. This report reviews the present and future policy settings for climate change mitigation and gr… more
Date: July 1, 2012
Creator: Stephen Howes & Paul Wyrwoll
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

UPGRADING THE CEBAF INJECTOR WITH A NEW BOOSTER, HIGHER VOLTAGE GUN, AND HIGHER FINAL ENERGY

Description: The Continuous Electron Beam Accelerator Facility (CEBAF) accelerator at Jefferson Lab will be upgraded from 6 GeV to 12 GeV in the next few years. To meet the requirement of the new machine and to take the opportunity to improve the beam quality, the CEBAF injector will be upgraded with a higher voltage gun, a new booster, and a new accelerating RF module. The CEBAF injector creates and accelerates three beams at different currents simultaneously. The beams are interleaved, each at one third o… more
Date: July 1, 2012
Creator: Kazimi, Reza; Freyberger, Arne; Hofler, Alicia; Hutton, Andrew & Hannon, Fay
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

USE OF SILICON CARBIDE MONITORS IN ATR IRRADIATION TESTING

Description: In April 2007, the Department of Energy (DOE) designated the Advanced Test Reactor (ATR) a National Scientific User Facility (NSUF) to advance US leadership in nuclear science and technology. By attracting new users from universities, laboratories, and industry, the ATR will support basic and applied nuclear research and development and help address the nation's energy security needs. In support of this new program, the Idaho National Laboratory (INL) has developed in-house capabilities to fabr… more
Date: July 1, 2012
Creator: Davis, K. L.; Chase, B.; Unruh, T.; Knudson, D. & Rempe, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Status of Proof-of-principle Experiment for Coherent Electron Cooling

Description: Coherent electron cooling (CEC) has a potential to significantly boost luminosity of high-energy, high-intensity hadron colliders. To verify the concept we conduct proof-of-the-principle experiment at RHIC. In this paper, we describe the current experimental setup to be installed into 2 o'clock RHIC interaction regions. We present current design, status of equipment acquisition and estimates for the expected beam parameters.
Date: July 1, 2012
Creator: Pinayev, I.; Ben-Zvi, Ilan; Bengtsson, J.; Elizarov, A.; Fedotov, A. V.; Gassner, D. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigating the performance of catalyst layer micro-structures with different platinum loadings

Description: In this study a four-phase micro-structure of a PEFC catalyst layer was reconstructed by randomly placing overlapping spheres for each solid catalyst phase. The micro-structure was mirrored to make a micro-structure. A body-fit computational mesh was produced for the reconstructed micro-structure in OpenFOAM. Associated conservation equations were solved within all the phases with electrochemical reaction as the boundary condition at the interface between ionomer and platinum phases. The study … more
Date: July 1, 2012
Creator: Khakaz-Baboli, Moben; Harvey, David & Pharoah, Jon
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Developing Government Renewable Energy Projects

Description: The US Army Corps of Engineers has retained Idaho National Laboratory (INL) to conduct a study of past INL experiences and complete a report that identifies the processes that are needed for the development of renewable energy projects on government properties. The INL has always maintained expertise in power systems and applied engineering and INL’s renewable energy experiences date back to the 1980’s when our engineers began performing US Air Force wind energy feasibility studies and developm… more
Date: July 1, 2012
Creator: Myers, Kurt S.; Baldwin, Thomas L.; Bush, Jason W. & Gentle, Jake P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Managing System of Systems Requirements with a Requirements Screening Group

Description: Figuring out an effective and efficient way to manage not only your Requirement’s Baseline, but also the development of all your individual requirements during a Program’s/Project’s Conceptual and Development Life Cycle Stages can be both daunting and difficult. This is especially so when you are dealing with a complex and large System of Systems (SoS) Program with potentially thousands and thousands of Top Level Requirements as well as an equal number of lower level System, Subsystem and Confi… more
Date: July 1, 2012
Creator: Barden, Ronald R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tritium Permeability of Incoloy 800H and Inconel 617

Description: Design of the Next Generation Nuclear Plant (NGNP) reactor and its high-temperature components requires information regarding the permeation of fission generated tritium and hydrogen product through candidate heat exchanger alloys. Release of fission-generated tritium to the environment and the potential contamination of the helium coolant by permeation of product hydrogen into the coolant system represent safety basis and product contamination issues. Of the three potential candidates for high… more
Date: July 1, 2012
Creator: Winston, Philip; Calderoni, Pattrick & Humrickhouse, Paul
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Raising Photoemission Efficiency with Surface Acoustic Waves

Description: We are developing a novel technique that may help increase the efficiency and reduce costs of photoelectron sources used at electron accelerators. The technique is based on the use of Surface Acoustic Waves (SAW) in piezoelectric materials, such as GaAs, that are commonly used as photocathodes. Piezoelectric fields produced by the traveling SAW spatially separate electrons and holes, reducing their probability of recombination, thereby enhancing the photoemission quantum efficiency of the photo… more
Date: July 1, 2012
Creator: A. Afanasev, F. Hassani, C.E. Korman, V.G. Dudnikov, R.P. Johnson, M. Poelker, K.E.L. Surles-Law
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Statistical Simulation of the Performance and Degradation of a PEMFC Membrane Electrode Assembly

Description: A 1-D MEA Performance model was developed that considered transport of liquid water, agglomerate catalyst structure, and the statistical variation of the MEA characteristic parameters. The model was validated against a low surface area carbon supported catalyst across various platinum loadings and operational conditions. The statistical variation was found to play a significant role in creating noise in the validation data and that there was a coupling effect between movement in material proper… more
Date: July 1, 2012
Creator: Harvey, David; Bellemare-Davis, Alexander; Karan, Kunal; Jayansankar, Barath; Pharoah, Jon; Colbow, Vesna et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improving EM&V for Energy Efficiency Programs (Fact Sheet)

Description: This fact sheet describes the objectives of the U.S. Department of Energy Uniform Methods Project to bring consistency to energy savings calculations in U.S. energy efficiency programs. The U.S. Department of Energy (DOE) is developing a framework and a set of protocols for determining gross energy savings from energy efficiency measures and programs. The protocols represent a refinement of the body of knowledge supporting energy efficiency evaluation, measurement, and verification (EM&V) a… more
Date: July 1, 2012
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measure Guideline: Internal Insulation of Masonry Walls

Description: This measure guideline provides recommendations for interior insulation assemblies that control interstitial condensation and durability risks; recommendations for acceptable thermal performance are also provided. An illustrated guide of high-risk exterior details (which concentrate bulk water), and recommended remediation details is provided. This is followed by a recommended methodology for risk assessment of a masonry interior insulation project: a series of steps are suggested to assess the… more
Date: July 1, 2012
Creator: Straube, J. F.; Ueno, K. & Schumacher, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Radiation Research Laboratory (Poster)

Description: SunShot Initiative awardee posters describing the different technologies within the four subprograms of the DOE Solar Program (Photovoltaics, Concentrating Solar Power, Soft Costs, and Systems Integration).
Date: July 1, 2012
Creator: Stoffel, T.; Andreas, A.; Reda, I.; Dooraghi, M.; Habte, A.; Kutchenreiter, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Role of Smarter Grids in Variable Renewable Resource Integration

Description: This presentation discusses the role of smarter grids in variable renewable resource integration and references material from a forthcoming ISGAN issue paper: Smart Grid Contributions to Variable Renewable Resource Integration, co-written by the presenter and currently in review.
Date: July 1, 2012
Creator: Miller, M.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

LIDAR Wind Speed Measurements of Evolving Wind Fields

Description: Light Detection and Ranging (LIDAR) systems are able to measure the speed of incoming wind before it interacts with a wind turbine rotor. These preview wind measurements can be used in feedforward control systems designed to reduce turbine loads. However, the degree to which such preview-based control techniques can reduce loads by reacting to turbulence depends on how accurately the incoming wind field can be measured. Past studies have assumed Taylor's frozen turbulence hypothesis, which impl… more
Date: July 1, 2012
Creator: Simley, E. & Pao, L. Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rising Above the Water: New Orleans Implements Energy Efficiency and Sustainability Practices Following Hurricanes Katrina and Rita (Fact Sheet)

Description: This fact sheet describes the technical assistance that the U.S. Department of Energy, through its National Renewable Energy Laboratory, provided to New Orleans, Louisiana, which helped the city incorporate energy efficiency into its rebuilding efforts for K-12 schools and homes following Hurricanes Katrina and Rita. NREL also provided support and analysis on energy policy efforts.
Date: July 1, 2012
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fast-neutron coded-aperture imaging of special nuclear material configurations

Description: In the past year, a prototype fast-neutron coded-aperture imager has been developed that has sufficient efficiency and resolution to make the counting of warheads for possible future treaty confirmation scenarios via their fission-neutron emissions practical. The imager is constructed from custom-built pixelated liquid scintillator detectors. The liquid scintillator detectors enable neutron-gamma discrimination via pulse shape, and the pixelated construction enables a sufficient number of pixel… more
Date: July 1, 2012
Creator: Hausladen, P. A.; Blackston, M. A.; Brubaker, E.; Chichester, D. L.; Marleau, P. & Newby, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HIGH POWER TEST OF RF SEPARATOR FOR 12 GEV UPGRADE OF CEBAF AT JLAB

Description: CEBAF at JLab is in the process of an energy upgrade from 6 GeV to 12 GeV. The existing setup of the RF separator cavities in the 5th pass will not be adequate to extract the highest energy (11 GeV) beam to any two existing halls (A, B or C) while simultaneously delivering to the new hall D in the case of the proposed 12 GeV upgrade of the machine. To restore this capability, we are exploring the possibility of extension of existing normal conducting 499 MHz TEM-type rf separator cavities. Deta… more
Date: July 1, 2012
Creator: Ahmed, S.; Wissmann, M.; Mammosser, J.; Hovater, C.; Spata, M.; Krafft, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Studies of the Twin Helix Parametric-resonance Ionization Cooling Channel with COSY INFINITY

Description: A primary technical challenge to the design of a high luminosity muon collider is an effective beam cooling system. An epicyclic twin-helix channel utilizing parametric-resonance ionization cooling has been proposed for the final 6D cooling stage. A proposed design of this twin-helix channel is presented that utilizes correlated optics between the horizontal and vertical betatron periods to simultaneously focus transverse motion of the beam in both planes. Parametric resonance is induced in bot… more
Date: July 1, 2012
Creator: J.A. Maloney, K.B. Beard, R.P. Johnson, A. Afanasev, S.A. Bogacz, Y.S. Derbenev, V.S. Morozov, B. Erdelyi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Verification and Validation of EnergyPlus Conduction Finite Difference and Phase Change Material Models for Opaque Wall Assemblies

Description: Phase change materials (PCMs) represent a potential technology to reduce peak loads and HVAC energy consumption in buildings. There are few building energy simulation programs that have the capability to simulate PCM but their accuracy has not been completely tested. This report summarizes NREL efforts to develop diagnostic tests cases to obtain accurate energy simulations when PCMs are modeled in residential buildings.
Date: July 1, 2012
Creator: Tabares-Velasco, P. C.; Christensen, C.; Bianchi, M. & Booten, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Progress on muon parametric-resonance ionization cooling channel development

Description: Parametric-resonance Ionization Cooling (PIC) is intended as the final 6D cooling stage of a high-luminosity muon collider. To implement PIC, a continuous-field twin-helix magnetic channel was developed. A 6D cooling with stochastic effects off is demonstrated in a GEANT4/G4beamline model of a system where wedge-shaped Be absorbers are placed at the appropriate dispersion points in the twin-helix channel and are followed by short rf cavities. To proceed to cooling simulations with stochastics o… more
Date: July 1, 2012
Creator: V.S. Morozov, Ya.S. Derbenev, A. Afanasev, K.B. Beard, R.P. Johnson, B. Erdelyi, J.A. Maloney
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of Wind Power and Load Forecasting Error Distributions: Preprint

Description: The introduction of large amounts of variable and uncertain power sources, such as wind power, into the electricity grid presents a number of challenges for system operations. One issue involves the uncertainty associated with scheduling power that wind will supply in future timeframes. However, this is not an entirely new challenge; load is also variable and uncertain, and is strongly influenced by weather patterns. In this work we make a comparison between the day-ahead forecasting errors enc… more
Date: July 1, 2012
Creator: Hodge, B. M.; Florita, A.; Orwig, K.; Lew, D. & Milligan, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ground Testing a Nuclear Thermal Rocket: Design of a sub-scale demonstration experiment

Description: In 2008, the NASA Mars Architecture Team found that the Nuclear Thermal Rocket (NTR) was the preferred propulsion system out of all the combinations of chemical propulsion, solar electric, nuclear electric, aerobrake, and NTR studied. Recently, the National Research Council committee reviewing the NASA Technology Roadmaps recommended the NTR as one of the top 16 technologies that should be pursued by NASA. One of the main issues with developing a NTR for future missions is the ability to econom… more
Date: July 1, 2012
Creator: Bedsun, David; Lee, Debra; Townsend, Margaret; Cooper, Clay A.; Chapman, Jennifer; Samborsky, Ronald et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen