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Commercial Gas Water Heaters, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)
Performance and purchasing specifications for commercial gas water heaters under the FEMP-designated product program.
Date:
September 1, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Community Development Block Grant Funds in Disaster Relief and Recovery
This report discusses how Community Development Block Grant (CDBG) programs are funded by Congress and what they have been used for in recent years: recovery efforts following terrorist attacks, riots, and natural disasters. The 111th Congress has approved $100 million in CDBG funds to help states and communities undertake disaster recovery activities in presidentially declared disaster areas affected by severe storms and flooding during the period from March 2010 through May 2010. The act limited distribution of these funds to states where the entire state was declared a disaster area (Rhode Island) and to states where at least 20 counties within the state were declared disaster areas (Tennessee, Kentucky, and Nebraska).
Date:
September 1, 2010
Creator:
Boyd, Eugene
Object Type:
Report
System:
The UNT Digital Library
Comparative Analysis of Modeling Studies on China's Future Energy and Emissions Outlook
The past decade has seen the development of various scenarios describing long-term patterns of future Greenhouse Gas (GHG) emissions, with each new approach adding insights to our understanding of the changing dynamics of energy consumption and aggregate future energy trends. With the recent growing focus on China's energy use and emission mitigation potential, a range of Chinese outlook models have been developed across different institutions including in China's Energy Research Institute's 2050 China Energy and CO2 Emissions Report, McKinsey & Co's China's Green Revolution report, the UK Sussex Energy Group and Tyndall Centre's China's Energy Transition report, and the China-specific section of the IEA World Energy Outlook 2009. At the same time, the China Energy Group at Lawrence Berkeley National Laboratory (LBNL) has developed a bottom-up, end-use energy model for China with scenario analysis of energy and emission pathways out to 2050. A robust and credible energy and emission model will play a key role in informing policymakers by assessing efficiency policy impacts and understanding the dynamics of future energy consumption and energy saving and emission reduction potential. This is especially true for developing countries such as China, where uncertainties are greater while the economy continues to undergo rapid growth …
Date:
September 1, 2010
Creator:
Zheng, Nina; Zhou, Nan & Fridley, David
Object Type:
Report
System:
The UNT Digital Library
Compressed Natural Gas (CNG) Transit Bus Experience Survey: April 2009--April 2010
This survey was commissioned by the U.S. Department of Energy (DOE) and the National Renewable Energy Laboratory (NREL) to collect and analyze experiential data and information from a cross-section of U.S. transit agencies with varying degrees of compressed natural gas (CNG) bus and station experience. This information will be used to assist DOE and NREL in determining areas of success and areas where further technical or other assistance might be required, and to assist them in focusing on areas judged by the CNG transit community as priority items.
Date:
September 1, 2010
Creator:
Adams, R. & Horne, D. B.
Object Type:
Report
System:
The UNT Digital Library
Compressive Phase Contrast Tomography
When x-rays penetrate soft matter, their phase changes more rapidly than their amplitude. Interference effects visible with high brightness sources creates higher contrast, edge enhanced images. When the object is piecewise smooth (made of big blocks of a few components), such higher contrast datasets have a sparse solution. We apply basis pursuit solvers to improve SNR, remove ring artifacts, reduce the number of views and radiation dose from phase contrast datasets collected at the Hard X-Ray Micro Tomography Beamline at the Advanced Light Source. We report a GPU code for the most computationally intensive task, the gridding and inverse gridding algorithm (non uniform sampled Fourier transform).
Date:
September 1, 2010
Creator:
Maia, Filipe; MacDowell, Alastair; Marchesini, Stefano; Padmore, Howard A.; Parkinson, Dula Y.; Pien, Jack et al.
Object Type:
Article
System:
The UNT Digital Library
Computational and experimental platform for understanding and optimizing water flux and salt rejection in nanoporous membranes.
Affordable clean water is both a global and a national security issue as lack of it can cause death, disease, and international tension. Furthermore, efficient water filtration reduces the demand for energy, another national issue. The best current solution to clean water lies in reverse osmosis (RO) membranes that remove salts from water with applied pressure, but widely used polymeric membrane technology is energy intensive and produces water depleted in useful electrolytes. Furthermore incremental improvements, based on engineering solutions rather than new materials, have yielded only modest gains in performance over the last 25 years. We have pursued a creative and innovative new approach to membrane design and development for cheap desalination membranes by approaching the problem at the molecular level of pore design. Our inspiration comes from natural biological channels, which permit faster water transport than current reverse osmosis membranes and selectively pass healthy ions. Aiming for an order-of-magnitude improvement over mature polymer technology carries significant inherent risks. The success of our fundamental research effort lies in our exploiting, extending, and integrating recent advances by our team in theory, modeling, nano-fabrication and platform development. A combined theoretical and experimental platform has been developed to understand the interplay between water …
Date:
September 1, 2010
Creator:
Rempe, Susan B.
Object Type:
Report
System:
The UNT Digital Library
A computational study of nodal-based tetrahedral element behavior.
This report explores the behavior of nodal-based tetrahedral elements on six sample problems, and compares their solution to that of a corresponding hexahedral mesh. The problems demonstrate that while certain aspects of the solution field for the nodal-based tetrahedrons provide good quality results, the pressure field tends to be of poor quality. Results appear to be strongly affected by the connectivity of the tetrahedral elements. Simulations that rely on the pressure field, such as those which use material models that are dependent on the pressure (e.g. equation-of-state models), can generate erroneous results. Remeshing can also be strongly affected by these issues. The nodal-based test elements as they currently stand need to be used with caution to ensure that their numerical deficiencies do not adversely affect critical values of interest.
Date:
September 1, 2010
Creator:
Gullerud, Arne S.
Object Type:
Report
System:
The UNT Digital Library
Concentrating Solar Power: Best Practices Handbook for the Collection and Use of Solar Resource Data (CSP)
As the world looks for low-carbon sources of energy, solar power stands out as the most abundant energy resource. Harnessing this energy is the challenge for this century. Photovoltaics and concentrating solar power (CSP) are two primary forms of electricity generation using sunlight. These use different technologies, collect different fractions of the solar resource, and have different siting and production capabilities. Although PV systems are most often deployed as distributed generation sources, CSP systems favor large, centrally located systems. Accordingly, large CSP systems require a substantial investment, sometimes exceeding $1 billion in construction costs. Before such a project is undertaken, the best possible information about the quality and reliability of the fuel source must be made available. That is, project developers need to have reliable data about the solar resource available at specific locations to predict the daily and annual performance of a proposed CSP plant. Without these data, no financial analysis is possible. This handbook presents detailed information about solar resource data and the resulting data products needed for each stage of the project.
Date:
September 1, 2010
Creator:
Stoffel, T.; Renne, D.; Myers, D.; Wilcox, S.; Sengupta, M.; George, R. et al.
Object Type:
Report
System:
The UNT Digital Library
Conceptual Design of Forced Convection Molten Salt Heat Transfer Testing Loop
This report develops a proposal to design and construct a forced convection test loop. A detailed test plan will then be conducted to obtain data on heat transfer, thermodynamic, and corrosion characteristics of the molten salts and fluid-solid interaction. In particular, this report outlines an experimental research and development test plan. The most important initial requirement for heat transfer test of molten salt systems is the establishment of reference coolant materials to use in the experiments. An earlier report produced within the same project highlighted how thermophysical properties of the materials that directly impact the heat transfer behavior are strongly correlated to the composition and impurities concentration of the melt. It is therefore essential to establish laboratory techniques that can measure the melt composition, and to develop purification methods that would allow the production of large quantities of coolant with the desired purity. A companion report describes the options available to reach such objectives. In particular, that report outlines an experimental research and development test plan that would include following steps: •Molten Salts: The candidate molten salts for investigation will be selected. •Materials of Construction: Materials of construction for the test loop, heat exchangers, and fluid-solid corrosion tests in the …
Date:
September 1, 2010
Creator:
Sohal, Manohar S.; Sabharwall, Piyush; Calderoni, Pattrick; Wertsching, Alan K. & Grover, S. Brandon
Object Type:
Report
System:
The UNT Digital Library
CONCRETE REFLECTED ARRAYS OF U(93.2) METAL
During the period from 1963 – 1973, experiments involving highly enriched uranium units were performed at the Oak Ridge National Laboratory Critical Experiments Facility to determine various critical configurations of three-dimensional arrays. The experiments formed a four-part series, and were reported by several different experimenters; the results of interest for this evaluation are those reported for the fourth experimentation, Critical Three-Dimensional Arrays of Neutron Interacting Units: Part IV, published and performed by D.W.Magnuson (Ref 1). Information is also available in the logbook . This set of experiments utilized subcritical metal units on a split table apparatus to determine critical configurations for 2×2×2 arrangements of highly enriched uranium reflected by concrete. Magnuson manipulated the configuration of several uranium cylinders and blocks within a concrete reflector. The different permutations utilized uranium cylinders of two different heights in various positions in the three dimensional array; certain cases also placed thin uranium blocks on top of the cylinders. The thickness of the surrounding concrete, as well as the inner dimensions of the concrete reflector was also varied in certain cases. The variations resulted in fourteen different experimental permutations or configurations. All fourteen configurations were judged to be unacceptable for use as criticality safety benchmarks. …
Date:
September 1, 2010
Creator:
Gorham, Mackenzie; Bess, John D.; Briggs, J. Blair; Dean, Virginia & Reed, Davis
Object Type:
Report
System:
The UNT Digital Library
Confirmation of the Copernican principle at Gpc radial scale and above from the kinetic Sunyaev Zel'dovich effect power spectrum
The Copernican principle, a cornerstone of modern cosmology, remains largely unproven at Gpc radial scale and above. Violations of this type will inevitably cause a first order anisotropic kinetic Sunyaev Zel'dovich (kSZ) effect. Here we show that, if large scale radial inhomogeneities have amplitude large enough to explain the 'dark energy' phenomena, the induced kSZ power spectrum will be orders of magnitude larger than the ACT/SPT upper limit. This single test rules out the void model as a viable alternative to dark energy to explain the apparent cosmic acceleration, confirms the Copernican principle on Gpc radial scale and above and closes a loophole in the standard cosmology.
Date:
September 1, 2010
Creator:
Zhang, Pengjie & Stebbins, Albert
Object Type:
Article
System:
The UNT Digital Library
Considerations Associated with Reactor Technology Selection for the Next Generation Nuclear Plant Project
At the inception of the Next Generation Nuclear Plant Project and during predecessor activities, alternative reactor technologies have been evaluated to determine the technology that best fulfills the functional and performance requirements of the targeted energy applications and market. Unlike the case of electric power generation where the reactor performance is primarily expressed in terms of economics, the targeted energy applications involve industrial applications that have specific needs in terms of acceptable heat transport fluids and the associated thermodynamic conditions. Hence, to be of interest to these industrial energy applications, the alternative reactor technologies are weighed in terms of the reactor coolant/heat transport fluid, achievable reactor outlet temperature, and practicality of operations to achieve the very high reliability demands associated with the petrochemical, petroleum, metals and related industries. These evaluations have concluded that the high temperature gas-cooled reactor (HTGR) can uniquely provide the required ranges of energy needs for these target applications, do so with promising economics, and can be commercialized with reasonable development risk in the time frames of current industry interest – i.e., within the next 10-15 years.
Date:
September 1, 2010
Creator:
Demick, L. E.
Object Type:
Report
System:
The UNT Digital Library
Consistent Data Assimilation of Structural Isotopes: 23Na and 56Fe
A new approach is proposed, the consistent data assimilation, that allows to link the integral data experiment results to basic nuclear parameters employed by evaluators to generate ENDF/B point energy files in order to improve them. Practical examples are provided for the structural materials 23Na and 56Fe. The sodium neutron propagation experiments, EURACOS and JANUS-8, are used to improve via modifications of 23Na nuclear parameters (like scattering radius, resonance parameters, Optical model parameters, Statistical Hauser-Feshbach model parameters, and Preequilibrium Exciton model parameters) the agreement of calculation versus experiments for a series of measured reaction rate detectors slopes. For the 56Fe case the EURACOS and ZPR3 assembly 54 are used. Results have shown inconsistencies in the set of nuclear parameters used so that further investigation is needed. Future work involves comparison of results against a more traditional multigroup adjustments, and extension to other isotope of interest in the reactor community.
Date:
September 1, 2010
Creator:
Palmiotti, Giuseppe
Object Type:
Report
System:
The UNT Digital Library
Construction and Evaluation of Post-Tensioned Pre-Stressed Concrete Pavement
This report discusses the issues raised during the pre-construction and construction phases of 9-in thick post-tensioned concrete pavement (PCP) with 300-ft long slabs that started in May 2008.
Date:
September 2010
Creator:
Choi, Seongcheol & Won, Moon-Cheol
Object Type:
Report
System:
The Portal to Texas History
Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation Project
Graphs of composite data products produced by DOE's Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation project through September 2010.
Date:
September 1, 2010
Creator:
Wipke, K.; Spirk, S.; Kurtz, J. & Ramsden, T.
Object Type:
Report
System:
The UNT Digital Library
CRADA Final Report: Materials Development For Pulp and Paper Mills, Task 9 Proof of Commercial Concept: Commodity Carbon Fibers From Weyerhaeuser Lignin Based Fibers
Tasks were assigned to Oak Ridge National Laboratory (ORNL) researchers for the development of lignin-based carbon fiber from a specific precursor that was produced by the Participant (Weyerhaeuser Corporation). These tasks included characterization of precursor polymers and fibers; and the development of conversion parameters for the fibers. ORNL researchers provided recommendations for in-house characterization of the precursor at the participant's laboratory. During the early stage of the precursor fiber production trials of various spools of fibers with varied compositions were produced. Some of those samples were sent to ORNL (by the Participant) for the development of conversion protocol. The trial tow samples were oxidized at ORNL's precursor evaluation system (PES), a bench-scale facility consisting of an oven, filament winder, tension controller, and a let off creel. The PES is a modular tool useful for the development of precursor conversion protocol. It can handle a single filament to a large single tow (50k filaments). It can also offer precise tensioning for few-filament tows. In the PES, after oxidation, fibers are typically carbonized first at low temperature, {le} 600 C, and subsequently at a higher temperature, {le} 1200 C with controlled residence time. ORNL has recently installed a new carbonization furnace with …
Date:
September 1, 2010
Creator:
Paulauskas, Felix L.; Naskar, Amit K.; Ozcan, Soydan; Keiser, James R. & Gorog, John Peter
Object Type:
Report
System:
The UNT Digital Library
The Cross Timbers Gazette (Flower Mound, Tex.), Ed. 1, September 2010
Monthly newspaper from Flower Mound, Texas that includes news and information for communities in southern Denton County along with advertising.
Date:
September 2010
Creator:
Miller, Max
Object Type:
Newspaper
System:
The Portal to Texas History
CW RF system of the Project-X accelerator front end
Front end of a CW linac of the Project X contains an H{sup -} source, an RFQ, a medium energy transport line with the beam chopper, and a SC low-beta linac that accelerates H{sup -} from 2.5 MeV to 160 MeV. SC Single Spoke Resonators (SSR) will be used in the linac, because Fermilab already successfully developed and tested a SSR for beta = 0.21. Two manufactured cavities achieve 2.5 times more than design accelerating gradients. One of these cavities completely dressed, e.g. welded to helium vessel with integrated slow and fast tuners, and tested in CW regime. Successful tests of beta = 0.21 SSR give us a confidence to use this type of cavity for low beta (0.117) and for high-beta (0.4) as well. Both types of these cavities are under development. In present report the basic constrains, parameters, electromagnetic and mechanical design for all the three SSR cavities, and first test results of beta = 0.21 SSR are presented.
Date:
September 1, 2010
Creator:
Khabiboulline, T.; Barbanotti, S.; Gonin, I.; Solyak, N.; Terechkine, I.; Yakovlev, V. et al.
Object Type:
Article
System:
The UNT Digital Library
[Cynthia Izaguirre in Student Union]
A photograph of Cynthia Izaguirre, an anchor with Dallas' WFAA, in the courtyard inside of the UNT Student Union for the Multicultural Center's Grand Re-Opening. She is wearing a grey blazer and white blouse and has a microphone attached to her lapel. She also has her purse over one arm. Other people and a banner are visible behind her.
Date:
September 1, 2010
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
[Cynthia Izaguirre speaking at Grand Re-Opening]
A photograph of Cynthia Izaguirre, an anchor with Dallas' WFAA, speaking behind a podium inside of the UNT Student Union for the Multicultural Center's Grand Re-Opening. She is wearing a grey blazer and white blouse and has a microphone attached to her lapel and one in front of her. The backdrop behind her is green and has the UNT logo and tagline on it.
Date:
September 1, 2010
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
Decomposition of Rare Earth Loaded Resin Particles
The Fuel Cycle R and D (FCR and D) program within the Department of Energy Office of Nuclear Energy (DOE-NE) is evaluating nuclear fuel cycle options, including once-through, modified open, and fully closed cycles. Each of these scenarios may utilize quite different fuel management schemes and variation in fuel types may include high thermal conductivity UO{sub 2}, thoria-based, TRISO, metal, advanced ceramic (nitride, carbide, composite, etc.), and minor actinide (MA) bearing fuels and targets. Researchers from the US, Europe, and japan are investigating methods of fabricating high-specific activity spherical particles for fuel and target applications. The capital, operating, and maintenance costs of such a fuel fabrication facility can be significant, thus fuel synthesis and fabrication processes that minimize waste and process losses, and require less footprint are desired. Investigations have been performed at the Institute for Transuranium Elements (ITU) and the French Atomic Energy Commission (CEA) studying the impact of americium and curium on the fuel fabrication process. proof of concept was demonstrated for fabrication of MA-bearing spherical particles, however additional development will be needed for engineering scale-up. Researchers at the Paul Scherer Institute (PSI) and the Japan Atomic Energy Association (JAEA) have collaborated on research with ceramic-metallic (CERMET) fuels …
Date:
September 1, 2010
Creator:
Voit, Stewart L & Rawn, Claudia J
Object Type:
Report
System:
The UNT Digital Library
Deep-sea oil plume enriches psychrophilic oil-degrading bacteria
The biological effects and expected fate of the vast amount of oil in the Gulf of Mexico from the Deepwater Horizon blowout are unknown owing to the depth and magnitude of this event. Here, we report that the dispersed hydrocarbon plume stimulated deep-sea indigenous {gamma}-Proteobacteria that are closely related to known petroleum degraders. Hydrocarbon-degrading genes coincided with the concentration of various oil contaminants. Changes in hydrocarbon composition with distance from the source and incubation experiments with environmental isolates demonstrated faster-than-expected hydrocarbon biodegradation rates at 5 C. Based on these results, the potential exists for intrinsic bioremediation of the oil plume in the deep-water column without substantial oxygen drawdown.
Date:
September 1, 2010
Creator:
Hazen, T. C.; Dubinsky, E. A.; DeSantis, T. Z.; Andersen, G. L.; Piceno, Y. M.; Singh, N. et al.
Object Type:
Article
System:
The UNT Digital Library
Delivery of workshops on corridor management and preservation in Texas
"This report summarizes the delivery and outcome of a series of workshops conducted at 23 Texas Department of Transportation (TxDOT) districts across the state on corridor management and preservation in Texas. The workshops served as follow-up implementation work for research project 0-5606, "Creating Partnerships with Local Communities to Manage and Preserve Corridors." The report provides an overview of the project and documents the dates, locations, and attendance of workshops implemented during the three-year project period."
Date:
September 2010
Creator:
Bochner, Brian S. & Hard, Edwin N.
Object Type:
Report
System:
The Portal to Texas History
Demonstration Report: Handheld UXO Discriminator, SERDP No. MR-1667
In 2003, the Defense Science Board observed: 'The problem is that instruments that can detect the buried UXOs also detect numerous scrap metal objects and other artifacts, which leads to an enormous amount of expensive digging. Typically 100 holes may be dug before a real UXO is unearthed! The Task Force assessment is that much of this wasteful digging can be eliminated by the use of more advanced technology instruments that exploit modern digital processing and advanced multi-mode sensors to achieve an improved level of discrimination of scrap from UXOs.' In keeping with these remarks and with prior funding (UX-1225, MM-0437, and MM-0838), the LBNL group has successfully designed and built the cart-mounted Berkeley UXO Discriminator (BUD) and demonstrated its performance at various test sites (cf. Gasperikova et al., 2007, 2008, and 2009). Because hand-held systems have the advantage of being lightweight, compact, portable, and deployable under most site conditions, they are particularly useful in areas of dense vegetation or challenging terrain. In heavily wooded areas or areas with steep or uneven terrain, hand-held sensors may be the only suitable device for UXO detection and discrimination because it can be carried through spaces that the operator could walk through or …
Date:
September 1, 2010
Creator:
Gasperikova, E.
Object Type:
Report
System:
The UNT Digital Library