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OUT Success Stories: Advanced Airfoils for Wind Turbines
New airfoils have substantially increased the aerodynamic efficiency of wind turbines. It is clear that these new airfoils substantially increased energy output from wind turbines. Virtually all new blades built in this country today use these advanced airfoil designs.
Date:
August 31, 2000
Creator:
Jones, J. & Green, B.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: The Sun's Joules CD-ROM and the School Energy Doctor
The Sun's Joules is a CD-ROM that mixes interactive exercises, videos, photographs, and text to provide a comprehensive encyclopedia on renewable energy.
Date:
August 31, 2000
Creator:
Eber, K.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Solar Roofing Shingles
Thin-film photovoltaic (PV) cells are now doubling as rooftop shingles. PV shingles offer many advantages. The energy generated from a building's PV rooftop shingles can provide power both to the building and the utility's power grid.
Date:
August 31, 2000
Creator:
Johnson, N.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Diamond-Cutter Drill Bits
DOE contributed markedly to the geothermal, oil, and gas industries through the development of the advanced polycrystalline diamond compact (PDC) drill bit. Diamond-cutter drill bits cut through tough rock quicker, reducing the cost of drilling for energy resources.
Date:
August 31, 2000
Creator:
Burr, R.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Sunrayce
This long-distance solar car race provides a unique opportunity to increase America's awareness of a variety of important issues: renewable energy sources and technologies, environmentally clean energy options, improvements in transportation and opportunities in new, fast-growing energy-related businesses.
Date:
August 31, 2000
Creator:
Douglas, G.
Object Type:
Book
System:
The UNT Digital Library
A Machine Approach for Field Weakening of Permanent-Magnet Motors
The commonly known technology of field weakening for permanent-magnet (PM) motors is achieved by controlling the direct-axis current component through an inverter, without using mechanical variation of the air gap, a new machine approach for field weakening of PM machines by direct control of air-gap fluxes is introduced. The demagnetization situation due to field weakening is not an issue with this new method. In fact, the PMs are strengthened at field weakening. The field-weakening ratio can reach 1O:1 or higher. This technology is particularly useful for the PM generators and electric vehicle drives.
Date:
April 2, 2000
Creator:
Hsu, J.S.
Object Type:
Article
System:
The UNT Digital Library
OUT Success Stories: Power Towers
Power towers convert the thermal energy of the sun to electricity. They are large-scale power plants producing clean energy and suited for operation in sunny, semi-arid regions of the world.
Date:
August 31, 2000
Creator:
Jones, J.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Photovoltaics in the National Parks
As part of its energy management program, the National Park Service (NPS) has been actively promoting energy conservation and the greater use of renewable energy technologies such as photovoltaics (PV). PV is proving to be a very effective way to produce electricity in our parks.
Date:
August 31, 2000
Creator:
Pitchford, P.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Rural Electrification in Brazil
The United States and Brazil are collaborating to bring electricity to some 5 million households in rural Brazil. Over the next decade, there is a potential to install approximately 500 megawatts (MW) of solar home systems and 1000 MW of community systems, bringing light to households, schools, and health clinics throughout rural Brazil.
Date:
August 31, 2000
Creator:
Strawn, N.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Renewable Energy at the Olympics
Many energy efficiency and renewable energy technologies were featured at the 1996 Atlanta Olympics. Most of the projects that contributed to the Olympics continue to provide a meaningful demonstration and learning experience for the people of Atlanta.
Date:
August 31, 2000
Creator:
Green, B.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Thin-Film PV: Leadership in Materials R and D
Photovoltaics (PV) is a modern energy technology that makes use of semiconductor materials to convert sunlight directly to electricity. The idea of thin film technology is to produce truly low-cost PV devices by using pennies worth of active semiconductor materials.
Date:
August 31, 2000
Creator:
Pitchford, P.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Battery Electricity Storage for Quality Power
A 3.5-megawatt valve-regulated lead-acid (VRLA) battery system installed at a lead recycling plant in California provides one hour of energy storage for both peak-shaving and uninterruptible power. It incorporates improvements in battery materials, manufacturing processes, and quality control.
Date:
August 31, 2000
Creator:
Recca, L.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Solar Trough Power Plants
The Solar Electric Generating System (SEGS) plants use parabolic-trough solar collectors to capture the sun's energy and convert it to heat. The SEGS plants range in capacity from 13.8 to 80 MW, and they were constructed to meet Southern California Edison Company's periods of peak power demand.
Date:
August 5, 2000
Creator:
Jones, J.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Chemical Treatments for Geothermal Brines
DOE research helped develop the large, untapped geothermal resource beneath the Salton Sea in California's Imperial Valley. The very hot brines under high pressure make them excellent for electric power production. The brines are very corrosive and contain high concentrations of dissolved silica. DOE worked with San Diego Gas and Electric Company to find a solution to the silica-scaling problem. This innovative brine treatment eliminated scaling and made possible the development of the Salton Sea geothermal resource.
Date:
August 31, 2000
Creator:
Burr, R.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Wind Turbine Development
Cost-shared projects with the U.S. Department of Energy and the wind industry have produced new, commercially available turbines that generate power at low costs. Advanced wind turbine technologies will be instrumental for the United States and other countries in meeting their commitments to reduce greenhouse gases.
Date:
August 31, 2000
Creator:
Jones, J. & Green, B.
Object Type:
Book
System:
The UNT Digital Library
Welding and Weldability of Thorium-Doped Iridium Alloys
Ir-0.3%W alloys doped with thorium are currently used as post-impact containment material for radioactive fuel in thermoelectric generators that provide stable electrical power for a variety of outer planetary space exploration missions. Welding and weldability of a series of alloys was investigated using arc and laser welding processes. Some of these alloys are prone to severe hot-cracking during welding. Weldability of these alloys was characterized using Sigmajig weldability test. Hot-cracking is influenced to a great extent by the fusion zone microstructure and composition. Thorium content and welding atmosphere were found to be very critical. The weld cracking behavior in these alloys can be controlled by modifying the fusion zone microstructure. Fusion zone microstructure was found to be controlled by welding process, process parameters, and the weld pool shape.
Date:
March 12, 2000
Creator:
David, S.A.; Ohriner, E.K. & King, J.F.
Object Type:
Article
System:
The UNT Digital Library
OUT Success Stories: Biomass Gasifiers
The world's first demonstration of an efficient, low-pressure biomass gasifier capable of producing a high-quality fuel is now operating in Vermont. The gasifier converts 200 tons of solid biomass per day into a clean-burning gas with a high energy content for electricity generation.
Date:
August 31, 2000
Creator:
Jones, J.
Object Type:
Book
System:
The UNT Digital Library
Development of the Conceptual Models for Chemical Conditions and Hydrology Used in the 1996 Performance Assessment for the Waste Isolation Pilot Plant
The Waste Isolation Pilot Plant (WIPP) is a US Department of Energy (DOE) facility for the permanent disposal of defense-related transuranic (TRU) waste. US Environmental Protection Agency (EPA) regulations specify that the DOE must demonstrate on a sound basis that the WIPP disposal system will effectively contain long-lived alpha-emitting radionuclides within its boundaries for 10,000 years following closure. In 1996, the DOE submitted the ''40 CFR Part 191 Compliance Certification Application for the Waste Isolation Pilot Plant'' (CCA) to the EPA. The CCA proposed that the WIPP site complies with EPA's regulatory requirements. Contained within the CCA are descriptions of the scientific research conducted to characterize the properties of the WIPP site and the probabilistic performance assessment (PA) conducted to predict the containment properties of the WIPP disposal system. In May 1998, the EPA certified that the TRU waste disposal at the WIPP complies with its regulations. Waste disposal operations at WIPP commenced on March 28, 1999. The 1996 WIPP PA model of the disposal system included conceptual and mathematical representations of key hydrologic and geochemical processes. These key processes were identified over a 22-year period involving data collection, data interpretation, computer models, and sensitivity studies to evaluate the importance …
Date:
May 24, 2000
Creator:
LARSON, KURT W.
Object Type:
Article
System:
The UNT Digital Library
OUT Success Stories: Four National Magnetic Field Exposure Facilities
The National Magnetic Field Exposure Facilities program is regarded internationally as the standard of excellence for EMF research. Results of research conducted with the four exposure systems have been included in a 1998 report to Congress. The program has already produced a steady improvement of exposure systems and methodology for EMF experiments.
Date:
August 31, 2000
Creator:
Brown, H.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Photovoltaic Deployment in West Bengal, India
Bringing electric power to thousands of people in India allows them to pump water electrically and to light their homes at night. For these applications, photovoltaic (PV) electricity is often the least expensive and most reliable power alternative. This market represents one of the largest and fastest growing sectors for renewable energy technology.
Date:
August 31, 2000
Creator:
Strawn, N.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: The Superconductivity Partnership Initiative
The U.S. Department of Energy's (DOE's) Superconductivity Partnership Initiative (SPI) stands at the forefront of worldwide efforts to advance research and development of superconducting power equipment for energy transmission, distribution, and industrial use.
Date:
August 5, 2000
Creator:
Reeca, L. & Platt, C.
Object Type:
Book
System:
The UNT Digital Library
OUT Success Stories: Twenty Years of Success
DOE's Office of Utility Technologies celebrates 20 years of success in renewable energy research, development, and deployment.
Date:
August 31, 2000
Creator:
Eber, K.
Object Type:
Book
System:
The UNT Digital Library
Initial Evidence for Self-Organized Criticality in Electric Power System Blackouts
We examine correlations in a time series of electric power system blackout sizes using scaled window variance analysis and R/S statistics. The data shows some evidence of long time correlations and has Hurst exponent near 0.7. Large blackouts tend to correlate with further large blackouts after a long time interval. Similar effects are also observed in many other complex systems exhibiting self-organized criticality. We discuss this initial evidence and possible explanations for self-organized criticality in power systems blackouts. Self-organized criticality, if fully confirmed in power systems, would suggest new approaches to understanding and possibly controlling blackouts.
Date:
January 4, 2000
Creator:
Carreras, B. A.; Dobson, I.; Newman, D. E. & Poole, A. B.
Object Type:
Article
System:
The UNT Digital Library
OUT Success Stories: Solar Hot Water Technology
Solar hot water technology was made great strides in the past two decades. Every home, commercial building, and industrial facility requires hot water. DOE has helped to develop reliable and durable solar hot water systems. For industrial applications, the growth potential lies in large-scale systems, using flat-plate and trough-type collectors. Flat-plate collectors are commonly used in residential hot water systems and can be integrated into the architectural design of the building.
Date:
August 31, 2000
Creator:
Clyne, R.
Object Type:
Book
System:
The UNT Digital Library