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Defense Suppliers: Factors Affecting U.S. Titanium Aircraft Component Manufacturers' Market Share of DOD Business

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Census data show that U.S. and foreign produced titanium prices varied from 2003 through 2012 depending on the product. For example, in 2012, the export price (the proxy for the U.S. price) for titanium bar--used to make engine blades--was higher than the import price (the proxy for the foreign price), while the export price for titanium sheet--used to make wing components--was less than the import pric… more
Date: July 1, 2013
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Performance and Reliability of Interface Materials for Automotive Power Electronics

Description: Thermal management and reliability are important because excessive temperature can degrade the performance, life, and reliability of power electronics and electric motors. Advanced thermal management technologies enable keeping temperature within limits; higher power densities; and lower cost materials, configurations and systems. Thermal interface materials, bonded interface materials and the reliability of bonded interfaces are discussed in this presentation.
Date: July 1, 2013
Creator: Narumanchi, S.; DeVoto, D.; Mihalic, M. & Paret, P.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

Potential Economic Impacts from Offshore Wind in the Southeast Region (Fact Sheet)

Description: Offshore wind is a clean, renewable source of energy and can be an economic driver in the United States. To better understand the employment opportunities and other potential regional economic impacts from offshore wind development, the U.S. Department of Energy (DOE) funded research that focuses on four regions of the country. The studies use multiple scenarios with various local job and domestic manufacturing content assumptions. Each regional study uses the new offshore wind Jobs and Economi… more
Date: July 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Summary of Conclusions and Recommendations Drawn from the DeepCWind Scaled Floating Offshore Wind System Test Campaign: Preprint

Description: The DeepCwind consortium is a group of universities, national labs, and companies funded under a research initiative by the U.S. Department of Energy (DOE) to support the research and development of floating offshore wind power. The two main objectives of the project are to better understand the complex dynamic behavior of floating offshore wind systems and to create experimental data for use in validating the tools used in modeling these systems. In support of these objectives, the DeepCwind c… more
Date: July 1, 2013
Creator: Robertson, A. N.; Jonkman, J. M.; Masciola, M. D.; Molta, P.; Goupee, A. J.; Coulling, A. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Novel Scanning Lens Instrument for Evaluating Fresnel Lens Performance: Equipment Development and Initial Results

Description: A system dedicated to the optical transmittance characterization of Fresnel lenses has been developed at NREL, in collaboration with the UPM. The system quantifies the optical efficiency of the lens by generating a performance map. The shape of the focused spot may also be analyzed to understand change in the lens performance. The primary instrument components (lasers and CCD detector) have been characterized to confirm their capability for performing optical transmittance measurements. Measure… more
Date: July 1, 2013
Creator: Herrero, R.; Miller, D. C.; Kurtz, S. R.; Anton, I. & Sala, G.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

Intra-membrane molecular interactions of K%2B channel proteins : application to problems in biodefense and bioenergy.

Description: Ion channel proteins regulate complex patterns of cellular electrical activity and ionic signaling. Certain K+ channels play an important role in immunological biodefense mechanisms of adaptive and innate immunity. Most ion channel proteins are oligomeric complexes with the conductive pore located at the central subunit interface. The long-term activity of many K+ channel proteins is dependent on the concentration of extracellular K+; however, the mechanism is unclear. Thus, this project focuse… more
Date: July 1, 2013
Creator: Moczydlowski, Edward G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Feasibility Study of Economics and Performance of Solar Photovoltaics at the Santo Domingo Pueblo in Sandoval County, New Mexico

Description: The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Pueblo of Santo Domingo in Sandoval County, New Mexico, for a renewable energy production feasibility study. The National Renewable Energy Laboratory (NREL) provided technical assistance for this project. The purpose of this report is to assess specific areas on the Pueblo for potential installation of photovoltaic (PV) systems and to estimate the cost, performance, and sit… more
Date: July 1, 2013
Creator: Geiger, J.; Lisell, L. & Mosey, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessing Fatigue and Ultimate Load Uncertainty in Floating Offshore Wind Turbines Due to Varying Simulation Length

Description: With the push towards siting wind turbines farther offshore due to higher wind quality and less visibility, floating offshore wind turbines, which can be located in deep water, are becoming an economically attractive option. The International Electrotechnical Commission's (IEC) 61400-3 design standard covers fixed-bottom offshore wind turbines, but there are a number of new research questions that need to be answered to modify these standards so that they are applicable to floating wind turbine… more
Date: July 1, 2013
Creator: Stewart, G.; Lackner, M.; Haid, L.; Matha, D.; Jonkman, J. & Robertson, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Scale/Analytical Analyses of Freezing and Convective Melting with Internal Heat Generation

Description: Using a scale/analytical analysis approach, we model phase change (melting) for pure materials which generate constant internal heat generation for small Stefan numbers (approximately one). The analysis considers conduction in the solid phase and natural convection, driven by internal heat generation, in the liquid regime. The model is applied for a constant surface temperature boundary condition where the melting temperature is greater than the surface temperature in a cylindrical geometry. Th… more
Date: July 1, 2013
Creator: Siahpush, Ali S.; Crepeau, John & Sabharwall, Piyush
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Rotation Angle for the Optimum Tracking of One-Axis Trackers

Description: An equation for the rotation angle for optimum tracking of one-axis trackers is derived along with equations giving the relationships between the rotation angle and the surface tilt and azimuth angles. These equations are useful for improved modeling of the solar radiation available to a collector with tracking constraints and for determining the appropriate motor revolutions for optimum tracking.
Date: July 1, 2013
Creator: Marion, W. F. & Dobos, A. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced Energy Retrofit Guide: Practical Ways to Improve Energy Performance; Grocery Stores (Revised) (Book)

Description: The U.S. Department of Energy developed the Advanced Energy Retrofit Guides (AERGs) to provide specific methodologies, information, and guidance to help energy managers and other stakeholders successfully plan and execute energy efficiency improvements. Detailed technical discussion is fairly limited in these guides. Instead, we emphasize actionable information, practical methodologies, diverse case studies, and unbiased evaluations of the most promising retrofit measures for each building type… more
Date: July 1, 2013
Creator: Hendron, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental Regulation Impacts on Eastern Interconnection Performance

Description: In the United States, recent environmental regulations will likely result in the removal of nearly 30 GW of oil and coal-fired generation from the power grid, mostly in the Eastern Interconnection (EI). The effects of this transition on voltage stability and transmission line flows have previously not been studied from a system-wide perspective. This report discusses the results of power flow studies designed to simulate the evolution of the EI over the next few years as traditional generation … more
Date: July 1, 2013
Creator: Markham, Penn N; Liu, Yilu & Young II, Marcus Aaron
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

UNDERSTANDING FLOW OF ENERGY IN BUILDINGS USING MODAL ANALYSIS METHODOLOGY

Description: It is widely understood that energy storage is the key to integrating variable generators into the grid. It has been proposed that the thermal mass of buildings could be used as a distributed energy storage solution and several researchers are making headway in this problem. However, the inability to easily determine the magnitude of the building’s effective thermal mass, and how the heating ventilation and air conditioning (HVAC) system exchanges thermal energy with it, is a significant challe… more
Date: July 1, 2013
Creator: Gardner, John; Heglund, Kevin; Wymelenberg, Kevin Van Den & Rieger, Craig
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Enhancing Tribal Energy Security and Clean Energy (Fact Sheet)

Description: This fact provides information on the Strategic Technical Assistance Response Team (START) Program, a U.S. Department of Energy Office of Indian Energy Policy and Programs (DOE-IE) initiative to provide technical expertise to support the development of next-generation energy projects in Indian Country.
Date: July 1, 2013
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Constitutive Modeling of High Temperature Uniaxial Creep-Fatigue and Creep-Ratcheting Responses of Alloy 617

Description: Inconel Alloy 617 is a high temperature creep and corrosion resistant alloy and is a leading candidate for use in Intermediate Heat Exchangers (IHX) of the Next Generation Nuclear Plants (NGNP). The IHX of the NGNP is expected to experience operating temperatures in the range of 800 degrees - 950 degrees C, which is in the creep regime of Alloy 617. A broad set of uniaxial, low-cycle fatigue, fatigue-creep, ratcheting, and ratcheting-creep experiments are conducted in order to study the fatigue… more
Date: July 1, 2013
Creator: Pritchard, P.G.; Carroll, L.J. & Hassan, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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