98 Matching Results

Search Results

Results: 1 - 24 next
open access

Upgrading Methane Using Ultra-Fast Thermal Swing Adsorption

Description: The purpose of this project is to design and demonstrate an approach to upgrade low-BTU methane streams from coal mines to pipeline-quality natural gas. The objective of Phase I of the project was to assess the technical feasibility and cost of upgrading low-BTU methane streams using ultra-fast thermal swing adsorption (TSA) using Velocys modular microchannel process technology. The objective of Phase II is to demonstrate the process at the bench scale. The project is on schedule and on budget.… more
Date: July 1, 2004
Creator: Tonkovich, Anna Lee
Partner: UNT Libraries Government Documents Department
open access

Gridley Ethanol Demonstration Project Utilizing Gasification Technology: Feedstock Supply Plan; March 15, 2004

Description: The report describes a Feedstock Supply Plan for the proposed Gridley Ethanol Demonstration Project to be located in the City of Gridley Industrial Park in Gridley, California. This report also includes information on the establishment of the required infrastructure required for collecting approximately 113,000 Bone Dry Tons (BDT) annually for the proposed facility. Using the Pearson Technology from Aberdeen, Mississippi, and the related engineering assumptions for required feedstock, it is est… more
Date: July 1, 2004
Partner: UNT Libraries Government Documents Department
open access

Multi-Pulse DARHT Machine-Plasma Plume Problem

Description: The plasma current decay time constant is predicted to be short compared to the pulse length and so self-focusing is predicted for most of the beam pulse. Four- pulse beam envelopes for a high dose case require mitigation, those for a low dose case do not. Methods of mitigation are summarized. Hose instability growth in the plume length is predicted to be minimal.
Date: July 1, 2004
Creator: Lauer, E J
Partner: UNT Libraries Government Documents Department
open access

NREL Pyrheliometer Comparisons (NPC-2003), September 22 - October 3, 2003, Golden, Colorado

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer.
Date: July 1, 2004
Creator: Stoffel, T.; Reda, I. & Wilcox, S.
Partner: UNT Libraries Government Documents Department
open access

ACME algorithms for contact in a multiphysics environment API version 2.2.

Description: An effort is underway at Sandia National Laboratories to develop a library of algorithms to search for potential interactions between surfaces represented by analytic and discretized topological entities. This effort is also developing algorithms to determine forces due to these interactions for transient dynamics applications. This document describes the Application Programming Interface (API) for the ACME (Algorithms for Contact in a Multiphysics Environment) library.
Date: July 1, 2004
Creator: Heinstein, Martin Wilhelm; Glass, Micheal W.; Gullerud, Arne S.; Brown, Kevin H.; Voth, Thomas Eugene & Jones, Reese E.
Partner: UNT Libraries Government Documents Department
open access

A preliminary report on the development of MATLAB tensor classes for fast algorithm prototyping.

Description: We describe three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or N-way array. We present a tensor class for manipulating tensors which allows for tensor multiplication and 'matricization.' We have further added two classes for representing tensors in decomposed format: cp{_}tensor and tucker{_}tensor. We demonstrate the use of these classes by implementing several algorithms that have appeared in the literature.
Date: July 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Partner: UNT Libraries Government Documents Department
open access

Preliminary versions of the MATLAB tensor classes for fast algorithm prototyping.

Description: We present the source code for three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or Nway array. This is a supplementary report; details on using this code are provided separately in SAND-XXXX.
Date: July 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Partner: UNT Libraries Government Documents Department
open access

An analytically solvable eigenvalue problem for the linear elasticity equations.

Description: Analytic solutions are useful for code verification. Structural vibration codes approximate solutions to the eigenvalue problem for the linear elasticity equations (Navier's equations). Unfortunately the verification method of 'manufactured solutions' does not apply to vibration problems. Verification books (for example [2]) tabulate a few of the lowest modes, but are not useful for computations of large numbers of modes. A closed form solution is presented here for all the eigenvalues and eige… more
Date: July 1, 2004
Creator: Day, David Minot & Romero, Louis Anthony
Partner: UNT Libraries Government Documents Department
open access

Sundance 2.0 tutorial.

Description: Sundance is a system of software components that allows construction of an entire parallel simulator and its derivatives using a high-level symbolic language. With this high-level problem description, it is possible to specify a weak formulation of a PDE and its discretization method in a small amount of user-level code; furthermore, because derivatives are easily available, a simulation in Sundance is immediately suitable for accelerated PDE-constrained optimization algorithms. This paper is a… more
Date: July 1, 2004
Creator: Long, Kevin R.
Partner: UNT Libraries Government Documents Department
open access

AGS Sextupole Error Part II

Description: N/A
Date: July 1, 2004
Creator: L., Hutchinson & Glenn, W.
Partner: UNT Libraries Government Documents Department
open access

Automated infrasound signal detection algorithms implemented in MatSeis - Infra Tool.

Description: MatSeis's infrasound analysis tool, Infra Tool, uses frequency slowness processing to deconstruct the array data into three outputs per processing step: correlation, azimuth and slowness. Until now, an experienced analyst trained to recognize a pattern observed in outputs from signal processing manually accomplished infrasound signal detection. Our goal was to automate the process of infrasound signal detection. The critical aspect of infrasound signal detection is to identify consecutive proce… more
Date: July 1, 2004
Creator: Hart, Darren
Partner: UNT Libraries Government Documents Department
open access

Plains CO2 Reduction Partnership Quarterly Technical Report: April-June 2004

Description: The Plains Co{sub 2} Reduction (PCOR) Partnership continues to make great progress. Task 2 (Technology Deployment) activities have focused on developing information on deployment issues to support Task 5 activities by providing information to be used to assess CO{sub 2} sequestration opportunities in the PCOR Partnership region. Task 3 (Public Outreach) activities have focused on developing an informational video about CO{sub 2} sequestration. Progress in Task 4 (Sources, Sinks, and Infrastruct… more
Date: July 1, 2004
Creator: Steadman, Edward N.
Partner: UNT Libraries Government Documents Department
open access

Advanced parallel programming models research and development opportunities.

Description: There is currently a large research and development effort within the high-performance computing community on advanced parallel programming models. This research can potentially have an impact on parallel applications, system software, and computing architectures in the next several years. Given Sandia's expertise and unique perspective in these areas, particularly on very large-scale systems, there are many areas in which Sandia can contribute to this effort. This technical report provides a s… more
Date: July 1, 2004
Creator: Wen, Zhaofang. & Brightwell, Ronald Brian
Partner: UNT Libraries Government Documents Department
open access

ITS strategic test plan : revision 1.0.

Description: This test plan describes the testing strategy for the ITS (Integrated-TIGER-Series) suite of codes. The processes and procedures for performing both verification and validation tests are described. ITS Version 5.0 was developed under the NNSA's ASC program and supports Sandia's stockpile stewardship mission.
Date: July 1, 2004
Creator: Franke, Brian Claude; Lorence, Leonard Joseph, Jr.; Crawford, Martin James (K-Tech Corporation, Albuquerque, NM); Cordova, Lisa A.; Kensek, Ronald Patrick & Laub, Thomas William
Partner: UNT Libraries Government Documents Department
open access

Testing thermocline filler materials and molten-salt heat transfer fluids for thermal energy storage systems used in parabolic trough solar power plants.

Description: Parabolic trough power systems that utilize concentrated solar energy to generate electricity are a proven technology. Industry and laboratory research efforts are now focusing on integration of thermal energy storage as a viable means to enhance dispatchability of concentrated solar energy. One option to significantly reduce costs is to use thermocline storage systems, low-cost filler materials as the primary thermal storage medium, and molten nitrate salts as the direct heat transfer fluid. P… more
Date: July 1, 2004
Creator: Kelly, Michael James; Hlava, Paul Frank & Brosseau, Douglas A.
Partner: UNT Libraries Government Documents Department
open access

An evaluation of the PENCURV model for penetration events in complex targets.

Description: Three complex target penetration scenarios are run with a model developed by the U. S. Army Engineer Waterways Experiment Station, called PENCURV. The results are compared with both test data and a Zapotec model to evaluate PENCURV's suitability for conducting broad-based scoping studies on a variety of targets to give first order solutions to the problem of G-loading. Under many circumstances, the simpler, empirically based PENCURV model compares well with test data and the much more sophistic… more
Date: July 1, 2004
Creator: Broyles, Todd P.
Partner: UNT Libraries Government Documents Department
open access

Proliferation concerns in the Russian closed nuclear weapons complex cities : a study of regional migration behavior.

Description: The collapse of the Soviet Union in 1991 left the legacy of the USSR weapons complex with an estimated 50 nuclear, chemical, and biological weapons cities containing facilities responsible for research, production, maintenance, and destruction of the weapons stockpile. The Russian Federation acquired ten such previously secret, closed nuclear weapons complex cities. Unfortunately, a lack of government funding to support these facilities resulted in non-payment of salaries to employees and even … more
Date: July 1, 2004
Creator: Flores, Kristen Lee
Partner: UNT Libraries Government Documents Department
open access

Simulations of the pipe overpack to compute constitutive model parameters for use in WIPP room closure calculations.

Description: The regulatory compliance determination for the Waste Isolation Pilot Plant includes the consideration of room closure. Elements of the geomechanical processes include salt creep, gas generation and mechanical deformation of the waste residing in the rooms. The WIPP was certified as complying with regulatory requirements based in part on the implementation of room closure and material models for the waste. Since the WIPP began receiving waste in 1999, waste packages have been identified that ar… more
Date: July 1, 2004
Creator: Park, Byoung Yoon & Hansen, Francis D.
Partner: UNT Libraries Government Documents Department
open access

A user's guide to Sandia's latin hypercube sampling software : LHS UNIX library/standalone version.

Description: This document is a reference guide for the UNIX Library/Standalone version of the Latin Hypercube Sampling Software. This software has been developed to generate Latin hypercube multivariate samples. This version runs on Linux or UNIX platforms. This manual covers the use of the LHS code in a UNIX environment, run either as a standalone program or as a callable library. The underlying code in the UNIX Library/Standalone version of LHS is almost identical to the updated Windows version of LHS re… more
Date: July 1, 2004
Creator: Swiler, Laura Painton & Wyss, Gregory Dane
Partner: UNT Libraries Government Documents Department
open access

Northern Cheyenne Reservation Coal Bed Natural Resource Assessment and Analysis of Produced Water Disposal Options

Description: Coalbed methane (CBM) development in the Powder River Basin (PRB) is currently one of the most active gas plays in the United States. Monthly production in 2002 reached about 26 BCF in the Wyoming portion of the basin. Coalbed methane reserves for the Wyoming portion of the basin are approximately 25 trillion cubic feet (TCF). Although coal beds in the Powder River Basin extend well into Montana, including the area of the Northern Cheyenne Indian Reservation, the only CBM development in Montana… more
Date: July 1, 2004
Creator: Wo, Shaochang; Lopez, David A.; Sr., Jason Whiteman & Reynolds, Bruce A.
Partner: UNT Libraries Government Documents Department
open access

Reducing Electrical Power Use with a Performance Based Incentive

Description: This Departmental Energy Management Program (DEMP) funded Model Program Study developed out of a potential DOE-ID Performance Based Incentive for the Idaho National Engineering and Environmental Laboratory (INEEL), lasting from October 2001 through May 2002, which stressed reductions in electrical usage. An analysis of demand usage obtained from monthly INEEL Power Management electric reports revealed reductions in demand from a majority of the site areas. The purpose of this Model Program stud… more
Date: July 1, 2004
Creator: Nell, M. Kathleen
Partner: UNT Libraries Government Documents Department
open access

Fiber Optical Micro-Detectors for Oxygen Sensing in Power Plants Progress Report

Description: A reflection mode fiber optic oxygen sensor that can operate at high temperatures for power plant applications is being developed. The sensor is based on the {sup 3}O{sub 2} quenching of the red emission from hexanuclear molybdenum chloride clusters. Alkali salts of Mo{sub 6}Cl{sub 12} were synthesized and heated to 280 C for one hour in air. Optical measurements of the thermally treated material confirm the potential of the salts as lumophores in high temperature fiber optic sensors. In additi… more
Date: July 1, 2004
Creator: Baker, Gregory L.; Ghosh, Ruby N. & III, D.J. Osborn
Partner: UNT Libraries Government Documents Department
Back to Top of Screen