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50,862 Matching Results

Start Over Decade 2010-2019 Year 2012

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prev Results: 50,857 - 50,862 of 50,862
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
Sustainable Transportation Fuels from Natural Gas (H{sub 2}), Coal and Biomass (open access)

Sustainable Transportation Fuels from Natural Gas (H{sub 2}), Coal and Biomass

This research program is focused primarily on the conversion of coal, natural gas (i.e., methane), and biomass to liquid fuels by Fischer-Tropsch synthesis (FTS), with minimum production of carbon dioxide. A complementary topic also under investigation is the development of novel processes for the production of hydrogen with very low to zero production of CO{sub 2}. This is in response to the nation�s urgent need for a secure and environmentally friendly domestic source of liquid fuels. The carbon neutrality of biomass is beneficial in meeting this goal. Several additional novel approaches to limiting carbon dioxide emissions are also being explored.
Date: December 31, 2012
Creator: Huffman, Gerald
Object Type: Report
System: The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 298, Ed. 1 Monday, December 31, 2012 (open access)

Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 298, Ed. 1 Monday, December 31, 2012

Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date: December 31, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Testing the effectiveness of an acoustic deterrent for gray whales along the Oregon coast (open access)

Testing the effectiveness of an acoustic deterrent for gray whales along the Oregon coast

This study was conducted to determine whether a low-powered sound source could be effective at deterring gray whales from areas that may prove harmful to them. With increased interest in the development of marine renewal energy along the Oregon coast the concern that such development may pose a collision or entanglement risk for gray whales. A successful acoustic deterrent could act as a mitigation tool to prevent harm to whales from such risks. In this study, an acoustic device was moored on the seafloor in the pathway of migrating gray whales off Yaquina Head on the central Oregon coast. Shore-based observers tracked whales with a theodolite (surveyor’s tool) to accurately locate whales as they passed the headland. Individual locations of different whales/whale groups as well as tracklines of the same whale/whale groups were obtained and compared between times with the acoustic device was transmitting and when it was off. Observations were conducted on 51 d between January 1 and April 15, 2012. A total of 143 individual whale locations were collected for a total of 243 whales, as well as 57 tracklines for a total of 142 whales. Inclement weather and equipment problems resulted in very small sample sizes, especially …
Date: December 31, 2012
Creator: Lagerquist, Barbara; Winsor, Martha & Mate, Bruce
Object Type: Report
System: The UNT Digital Library
[Treasury report] (open access)

[Treasury report]

A treasury report for the Dallas Way.
Date: December 31, 2012
Creator: unknown
Object Type: Report
System: The UNT Digital Library
University of Arizona Compressed Air Energy Storage: Executive Summary (open access)

University of Arizona Compressed Air Energy Storage: Executive Summary

Boiled down to its essentials, the grant’s purpose was to develop and demonstrate the viability of compressed air energy storage (CAES) for use in renewable energy development. While everyone agrees that energy storage is the key component to enable widespread adoption of renewable energy sources, the development of a viable scalable technology has been missing. The Department of Energy has focused on expanded battery research and improved forecasting, and the utilities have deployed renewable energy resources only to the extent of satisfying Renewable Portfolio Standards. The lack of dispatchability of solar and wind-based electricity generation has drastically increased the cost of operation with these components. It is now clear that energy storage coupled with accurate solar and wind forecasting make up the only combination that can succeed in dispatchable renewable energy resources. Conventional batteries scale linearly in size, so the price becomes a barrier for large systems. Flow batteries scale sub-linearly and promise to be useful if their performance can be shown to provide sufficient support for solar and wind-base electricity generation resources. Compressed air energy storage provides the most desirable answer in terms of scalability and performance in all areas except efficiency. With the support of the DOE, Tucson …
Date: December 31, 2012
Creator: Simmons, Joseph & Muralidharan, Krishna
Object Type: Report
System: The UNT Digital Library
The use of real-time off-site observations as a methodology for increasing forecast skill in prediction of large wind power ramps one or more hours ahead of their impact on a wind plant. (open access)

The use of real-time off-site observations as a methodology for increasing forecast skill in prediction of large wind power ramps one or more hours ahead of their impact on a wind plant.

ABSTRACT Application of Real-Time Offsite Measurements in Improved Short-Term Wind Ramp Prediction Skill Improved forecasting performance immediately preceding wind ramp events is of preeminent concern to most wind energy companies, system operators, and balancing authorities. The value of near real-time hub height-level wind data and more general meteorological measurements to short-term wind power forecasting is well understood. For some sites, access to onsite measured wind data - even historical - can reduce forecast error in the short-range to medium-range horizons by as much as 50%. Unfortunately, valuable free-stream wind measurements at tall tower are not typically available at most wind plants, thereby forcing wind forecasters to rely upon wind measurements below hub height and/or turbine nacelle anemometry. Free-stream measurements can be appropriately scaled to hub-height levels, using existing empirically-derived relationships that account for surface roughness and turbulence. But there is large uncertainty in these relationships for a given time of day and state of the boundary layer. Alternatively, forecasts can rely entirely on turbine anemometry measurements, though such measurements are themselves subject to wake effects that are not stationary. The void in free-stream hub-height level measurements of wind can be filled by remote sensing (e.g., sodar, lidar, and radar). However, …
Date: December 31, 2012
Creator: Wilde, Martin
Object Type: Report
System: The UNT Digital Library