Utility-Scale Silicon Carbide Semiconductor: Monolithic Silicon Carbide Anode Switched Thyristor for Medium Voltage Power Conversion (open access)

Utility-Scale Silicon Carbide Semiconductor: Monolithic Silicon Carbide Anode Switched Thyristor for Medium Voltage Power Conversion

ADEPT Project: GeneSiC is developing an advanced silicon-carbide (SiC)-based semiconductor called an anode-switched thyristor. This low-cost, compact SiC semiconductor conducts higher levels of electrical energy with better precision than traditional silicon semiconductors. This efficiency will enable a dramatic reduction in the size, weight, and volume of the power converters and electronic devices it's used in.GeneSiC is developing its SiC-based semiconductor for utility-scale power converters. Traditional silicon semiconductors can't process the high voltages that utility-scale power distribution requires, and they must be stacked in complicated circuits that require bulky insulation and cooling hardware. GeneSiC's semiconductors are well suited for high-power applications like large-scale renewable wind and solar energy installations.
Date: September 1, 2010
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Vehicle Technologies Program: Goals, Strategies, and Top Accomplishments (Brochure) (open access)

Vehicle Technologies Program: Goals, Strategies, and Top Accomplishments (Brochure)

Fact sheet describes the Vehicle Technologies Program and its goals, strategies and top accomplishments.
Date: December 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Voltage Regulator Chip: Power Supplies on a Chip (open access)

Voltage Regulator Chip: Power Supplies on a Chip

ADEPT Project: CPES at Virginia Tech is finding ways to save real estate on a computer's motherboard that could be used for other critical functions. Every computer processor today contains a voltage regulator that automatically maintains a constant level of electricity entering the device. These regulators contain bulky components and take up about 30% of a computer's motherboard. CPES at Virginia Tech is developing a voltage regulator that uses semiconductors made of gallium nitride on silicon (GaN-on-Si) and high-frequency soft magnetic material. These materials are integrated on a small, 3D chip that can handle the same amount of power as traditional voltage regulators at 1/10 the size and with improved efficiency. The small size also frees up to 90% of the motherboard space occupied by current voltage regulators.
Date: September 1, 2010
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Waste Heat Recovery System: Lightweight Thermal Energy Recovery (LIGHTER) System (open access)

Waste Heat Recovery System: Lightweight Thermal Energy Recovery (LIGHTER) System

Broad Funding Opportunity Announcement Project: GM is using shape memory alloys that require as little as a 10°C temperature difference to convert low-grade waste heat into mechanical energy. When a stretched wire made of shape memory alloy is heated, it shrinks back to its pre-stretched length. When the wire cools back down, it becomes more pliable and can revert to its original stretched shape. This expansion and contraction can be used directly as mechanical energy output or used to drive an electric generator. Shape memory alloy heat engines have been around for decades, but the few devices that engineers have built were too complex, required fluid baths, and had insufficient cycle life for practical use. GM is working to create a prototype that is practical for commercial applications and capable of operating with either air- or fluid-based heat sources. GM’s shape memory alloy based heat engine is also designed for use in a variety of non-vehicle applications. For example, it can be used to harvest non-vehicle heat sources, such as domestic and industrial waste heat and natural geothermal heat, and in HVAC systems and generators.
Date: January 1, 2010
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Water-Cooled Electric Chillers, Purchasing Specifications for Energy-Efficient Products (Fact Sheet) (open access)

Water-Cooled Electric Chillers, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)

Energy efficiency purchasing specifications for federal procurements of water-cooled electric chillers.
Date: December 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind Energy Aerodynamics/Aeroacoustics (Fact Sheet) (open access)

Wind Energy Aerodynamics/Aeroacoustics (Fact Sheet)

This fact sheet describes aerodynamics and aeroacoustics research conducted at the NWTC.
Date: December 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind Energy Ordinances (Fact Sheet) (open access)

Wind Energy Ordinances (Fact Sheet)

Due to increasing energy demands in the United States and more installed wind projects, rural communities and local governments with limited or no experience with wind energy now have the opportunity to become involved in this industry. Communities with good wind resources may be approached by entities with plans to develop the resource. Although these opportunities can create new revenue in the form of construction jobs and land lease payments, they also create a new responsibility on the part of local governments to create ordinances to regulate wind turbine installations. Ordinances are laws, often found within municipal codes that provide various degrees of control to local governments. These laws cover issues such as zoning, traffic, consumer protection, and building codes. Wind energy ordinances reflect local needs and wants regarding wind turbines within county or city lines and aid the development of safe facilities that will be embraced by the community. Since 2008 when the National Renewable Energy Laboratory released a report on existing wind energy ordinances, many more ordinances have been established throughout the United States, and this trend is likely to continue in the near future as the wind energy industry grows. This fact sheet provides an overview of …
Date: August 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind for Schools: A Wind Powering America Project (Alaska) (Brochure) (open access)

Wind for Schools: A Wind Powering America Project (Alaska) (Brochure)

This brochure provides an overview of Wind Powering America's Wind for Schools Project, including a description of the project, the participants, funding sources, the basic configurations, and how interested parties can become involved.
Date: February 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind for Schools Project Curriculum Brief (Fact Sheet) (open access)

Wind for Schools Project Curriculum Brief (Fact Sheet)

The U.S. Department of Energy's (DOE's) 20% Wind Energy by 2030 report recommends expanding education to ensure a trained workforce to meet the projected growth of the wind industry and deployment. Although a few U.S. higher education institutions offer wind technology education programs, most are found in community and technical colleges, resulting in a shortage of programs preparing highly skilled graduates for wind industry careers. Further, the United States lags behind Europe (which has more graduate programs in wind technology design and manufacturing) and is in danger of relinquishing the economic benefits of domestic production of wind turbines and related components and services to European countries. DOE's Wind Powering America initiative launched the Wind for Schools project to develop a wind energy knowledge base among future leaders of our communities, states, and nation while raising awareness about wind energy's benefits. This fact sheet provides an overview of wind energy curricula as it relates to the Wind for Schools project.
Date: August 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind Resource Assessments and Mapping; Knowing and Showing Where the Wind Resource Can be Found (Fact Sheet) (open access)

Wind Resource Assessments and Mapping; Knowing and Showing Where the Wind Resource Can be Found (Fact Sheet)

This fact sheet describes wind resource assessments and mapping conducted at the NWTC.
Date: August 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind Technology Application (Fact Sheet) (open access)

Wind Technology Application (Fact Sheet)

This fact sheet describes outreach and deployment activities fostered by Wind Powering America.
Date: December 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Wind Turbine Design Innovations Drive Industry Transformation; The Spectrum of Clean Energy Innovation (Fact Sheet) (open access)

Wind Turbine Design Innovations Drive Industry Transformation; The Spectrum of Clean Energy Innovation (Fact Sheet)

Fact sheet describing NREL's history developing wind turbines with GE from 1984 - 2010.
Date: June 1, 2010
Creator: unknown
Object Type: Report
System: The UNT Digital Library