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Analysis of hydrogen vehicles with cryogenic high pressure storage
Insulated pressure vessels are cryogenic-capable pressure vessels that can be fueled with liquid hydrogen (LIQ) or ambient-temperature compressed hydrogen (CH2). Insulated pressure vessels offer the advantages of liquid hydrogen tanks (low weight and volume), with reduced disadvantages (lower energy requirement for hydrogen liquefaction and reduced evaporative losses). This paper shows an evaluation of the applicability of the insulated pressure vessels for light-duty vehicles. The paper shows an evaluation of evaporative losses and insulation requirements and a description of the current experimental plans for testing insulated pressure vessels. The results show significant advantages to the use of insulated pressure vessels for light-duty vehicles.
Date:
June 19, 1998
Creator:
Aceves, S. M. & Berry, G. D.
Object Type:
Article
System:
The UNT Digital Library
Readiness to proceed: Characterization planning basis
This report summarizes characterization requirements, data availability, and data acquisition plans in support of the Phase 1 Waste Feed Readiness to Proceed Mid-Level Logic. It summarizes characterization requirements for the following program planning documents: Waste Feed Readiness Mid-Level Logic and Decomposition (in development); Master blue print (not available); Tank Waste Remediation System (TWRS) Operations and Utilization Plan and Privatization Contract; Enabling assumptions (not available); Privatization low-activity waste (LAW) Data Quality Objective (DQO); Privatization high-level waste (HLW) DQO (draft); Problem-specific DQOs (in development); Interface control documents (draft). Section 2.0 defines the primary objectives for this report, Section 3.0 discusses the scope and assumptions, and Section 4.0 identifies general characterization needs and analyte-specific characterization needs or potential needs included in program documents and charts. Section 4.0 also shows the analyses that have been conducted, and the archive samples that are available for additional analyses. Section 5.0 discusses current plans for obtaining additional samples and analyses to meet readiness-to-proceed requirements. Section 6.0 summarizes sampling needs based on preliminary requirements and discusses other potential characterization needs. Many requirements documents are preliminary. In many cases, problem-specific DQOs have not been drafted, and only general assumptions about the document contents could be obtained from the authors. …
Date:
January 19, 1998
Creator:
Adams, M.R.
Object Type:
Report
System:
The UNT Digital Library
Heavy ion fusion experiments at LBNL and LLNL
The long-range goal of the US Heavy Ion Fusion (HIF) program is to develop heavy ion accelerators capable of igniting inertial fusion targets to generate fusion energy for electrical power production. Accelerators for heavy ion fusion consist of several subsystems: ion sources, injectors, matching sections, combiners, induction acceleration sections with electric and magnetic focusing, beam compression and bending sections, and a final-focus system to focus the beams onto the target. We are currently assembling or performing experiments to address the physics of all these subsystems. This paper will discuss some of these experiments.
Date:
August 19, 1998
Creator:
Ahle, L
Object Type:
Article
System:
The UNT Digital Library
Recent progress in the development of a circular ion induction accelerator for space charge dominated beams at LLNL
The Heavy Ion Fusion Group at Lawrence Livermore National Laboratory has for several years been developing the world�s first circular ion induction accelerator. This machine has recently been extended to 90 degrees, or 10 half-lattice periods (HLP) with full beam transport. In addition, induction cores have been installed on five of the HLP�s, each with an independent arbitrary waveform pulser. An arbitrary waveform pulser for the bending electrostatic dipoles has also been enabled. Together, they have allowed the first attempts at coordinated bending and acceleration of the beam. The results of these first attempts will be reported on in the paper by examining the output of various diagnostic devices, such as the capacitive Beam Probes (C-probes), slit scanners, and the Gated Beam Imager(GBI).
Date:
August 19, 1998
Creator:
Ahle,L; Autrey,D; Barnard, J; Berners ,D; Craig, G; Debeling, A et al.
Object Type:
Article
System:
The UNT Digital Library
Hydrogen-fueled polymer electrolyte fuel cell systems for transportation.
The performance of a polymer electrolyte fuel cell (PEFC) system that is fueled directly by hydrogen has been evaluated for transportation vehicles. The performance was simulated using a systems analysis code and a vehicle analysis code. The results indicate that, at the design point for a 50-kW PEFC system, the system efficiency is above 50%. The efficiency improves at partial load and approaches 60% at 40% load, as the fuel cell operating point moves to lower current densities on the voltage-current characteristic curve. At much lower loads, the system efficiency drops because of the deterioration in the performance of the compressor, expander, and, eventually, the fuel cell. The results also indicate that the PEFC system can start rapidly from ambient temperatures. Depending on the specific weight of the fuel cell (1.6 kg/kW in this case), the system takes up to 180s to reach its design operating conditions. The PEFC system has been evaluated for three mid-size vehicles: the 1995 Chrysler Sedan, the near-term Ford AIV (Aluminum Intensive Vehicle) Sable, and the future P2000 vehicle. The results show that the PEFC system can meet the demands of the Federal Urban Driving Schedule and the Highway driving cycles, for both warm and …
Date:
October 19, 1998
Creator:
Ahluwalia, R.; Doss, E.D. & Kumar, R.
Object Type:
Report
System:
The UNT Digital Library
RULLI/a Photon Counting Imager
The Remote Low Light Imaging (RULLI) system responds to individual photons using a modification to conventional image intensifier technology and fast timing electronics. Each photon received at the detector is resolved in three dimensions (X, Y, and time). The accumulation of photons over time allows the system to image with very low light levels, such as starlight illumination. Using a low power pulsed laser and very fine time discrimination, three dimensional imaging has been accomplished with a vertical resolution of five cm.
Date:
October 19, 1998
Creator:
Albright, K. L.; Smith, R. C.; Ho, C.; Wilson, S. K.; Bradley, J.; Bird, A. et al.
Object Type:
Article
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 6, Ed. 1 Wednesday, August 19, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
August 19, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 47, Ed. 1 Monday, October 19, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 19, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 70, Ed. 1 Thursday, November 19, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 19, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Domain decomposition methods for parallel laser-tissue models with Monte Carlo transport
Achieving parallelism in simulations that use Monte Carlo transport methods presents interesting challenges. For problems that require domain decomposition, load balance can be harder to achieve. The Monte Carlo transport package may have to operate with other packages that have different optimal domain decompositions for a given problem. To examine some of these issues, we have developed a code that simulates the interaction of a laser with biological tissue; it uses a Monte Carlo method to simulate the laser and a finite element model to simulate the conduction of the temperature field in the tissue. We will present speedup and load balance results obtained for a suite of problems decomposed using a few domain decomposition algorithms we have developed.
Date:
October 19, 1998
Creator:
Alme, H.J.; Rodrique, G. & Zimmerman, G.
Object Type:
Article
System:
The UNT Digital Library
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Oklahoma State University
Photograph of a scene on the Tulsa Campus of Oklahoma State University.
Date:
June 19, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History