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Advanced on-board electric vehicle charger. Final report

Description: The design and development of an on-board charger power module for use in electric vehicles is described. The module operates at 20KHz in a series resonant, half bridge configuration. Circuit design trade-offs, module performance, and solutions to the problems of acoustic noise, maintaining high power factor, circuit protection and operating reliability are discussed. The power module operates from a single phase, 240 V, 50/60 Hz utility line. Average power factor is 0.90; efficiency at maximum power output is 86%. The module is rated to charge a bank consisting of 20 Exide EV-106 batteries (60 cells) to an end voltage of 2.42 V/cell. Physically, the module weighs less than 17 Kg. Projected manufacturing cost at the thousand unit level is $394.00 (1978 dollars).
Date: December 31, 1979
Partner: UNT Libraries Government Documents Department

Development of Geothermal Binary Cycle Working Fluid Properties Information and Analysis of Cycles

Description: The research discussed in this report was performed at the University of Oklahoma during the period January 1, 1979 through December 31, 1979. Efforts were directed principally to the following tasks: (1) comparisons of mixture and pure fluid cascade cycles, (2) development of guidelines for working fluid selection for single boiler cycles, (3) continued evaluation of mixtures as working fluids, (4) working fluid thermophysical property correlation and presentations of properties information.
Date: December 31, 1979
Creator: Starling, Kenneth E.; Iqbal, K.Z.; Malik, Z.I.; Chu, C.T.; Ramaswamy, S.; Kumar, K.H. et al.
Partner: UNT Libraries Government Documents Department

Development of high efficiency cascade solar cells. Quarterly technical progress report No. 2

Description: Research has continued in the development of selected ternary and quaternary III-V materials that are potential candidates for cascade solar cell applications. In addition, various simple and multi-junction cascade solar cell components have been fabricated and evaluated in a continuing study of several different solar cell designs (materials combinations). During the present reporting period, work has concentrated on the following major areas: GaAlAs/GaAs cell development; AlGaAsSb/GaAsSb materials development; GaInP materials development via VPE; inverted structure development; and MO/CVD growth system work at NCSU. Progress in each of these areas is summarized.
Date: December 31, 1979
Partner: UNT Libraries Government Documents Department

Development of superior liquid coolants CCF-1. Final technical report, 1 September 1978-31 December 1979

Description: A comprehensive study of four representative commercially available heat transfer fluids being used in solar systems was undertaken to establish the most cost effective fluid over the life of the system. Criteria for making the assessment were the relative results of fluid toxicity tests, fire hazards tests, collector stagnation tests, and physical property comparison data of various fluids. The specific fluids evaluated were Dow Corning SylthermTM 444 silicone, Uniroyal PAO-LV polyalphaolefin hydrocarbon, Union Carbide Prestone II ethylene glycol/water solution and Dow Chemical Ambitrol NTC propylene glycol/water solution. Although there is no essential difference in the installed cost when comparing solar systems based on each of these fluids, there is a very large cost difference between the systems when life cycle costing is performed on the systems. The system representing propylene glycol/water is by far the most costly system followed by the system representing ethylene glycol/water due to possible failures and maintenance schedules. The Uniroyal PAO-LV polyalphaolefin system is the third most expensive system. The SylthermTM 444 silicone system is the least expensive, offering little or no potential for catastrophic failure and does not require any fluid maintenance.
Date: December 31, 1979
Creator: Hodges, R M
Partner: UNT Libraries Government Documents Department

[Experimental and theoretical plasma physics program]. Technical progress in FY 1979

Description: This report summarizes recent technical progress in the major areas of study. Because a considerable variety of work has been performed this year they authors first give brief synopses of individual research projects categorizing them as to their relevance to the general areas of plasma stability analyses, plasma heating or basic plasma physics. Next, they discuss these projects as they relate to and support the various DOE experimental programs. The DOE experimental programs are: (1) toroidal confinement systems; (2) open confinement systems; and (3) alternative concepts (EBT, Spheromak, field reversed mirrors and punches).
Date: December 31, 1979
Creator: Griem, H.
Partner: UNT Libraries Government Documents Department

Flux pinning and flux flow studies in superconductors using flux flow noise techniques. Progress report, April 1-December 30, 1979

Description: Flux flow noise power spectra were investigated, and information obtained through such spectra is applied to describe flux flow and pinning in situations where volume pinning force data is also available. In one case, the application of noise data to PB/sub 80/In/sub 20/ samples after recovery and after high temperature annealing is discussed. This work is consistent with a recent model for flux flow noise generation. In the second case we discuss experiments designed to change the fluxoid transit path length, which according to the model should affect both the noise amplitude and the parameter ..cap alpha.. specifying the longest subpulse times in terms of the average transit time, tau/sub c/. Transient flux flow voltages when a current is switched on after field cycling a Pb/sub 60/In/sub 40/ sample have been discovered. Noise spectra have been measured during the transient. These observations are discussed along with a simple model which fits the data. A surprising result is that the transient decay times increase with the applied current. Other characteristics of Pb/sub 60/In/sub 40/ after cold working are also discussed.
Date: December 31, 1979
Creator: Joiner, W.C.H.
Partner: UNT Libraries Government Documents Department

Inertial Confinement Fusion Program. Progress report FY 1979

Description: The first phase of an experimental program designed to accelerator a planar target to implosion level velocities was completed. Some results on ablation physics, the hydrodynamic stability limit, and the associated laser-plasma coupling physics are also included.
Date: December 31, 1979
Partner: UNT Libraries Government Documents Department

Linear-motor drives for machine tools

Description: Conventional techniques to position moving platforms on precision machines have relied heavily on mechanical drives such as the ball-nut/lead-screw system. Unfortunately, as positioning tolerances become more and more demanding, the cyclic errors-inherent even in precision gear drives-contribute an excessive amount of positioning uncertainty. The linear-motor drive system is one approach to provide a smooth, accurate, vibration-free method for locating a moving platform. Some existing uses of linear motors in industry as well as potential future applications on precision machines are discussed.
Date: December 31, 1979
Creator: Barkman, W.E.
Partner: UNT Libraries Government Documents Department

Model development for in situ test results in argillaceous rock

Description: Near-surface heater tests have been conducted in two different geologic settings for argillaceous rocks. The results of these tests have provided the in situ data necessary to develop the thermomechanical models for predicting the response of argillaceous rock to thermal load representative of high-level nuclear waste.
Date: December 31, 1979
Creator: Tyler, L.D.
Partner: UNT Libraries Government Documents Department

Mound Facility. 1978 annual report

Description: For Mound Facility, the year 1978 was one of progress marked by enhanced mission assignments and significant milestones. The thirtieth anniversary of the site was celebrated, and Monsanto Research Corporation began a new 5 year contract to operate the Mound Facility. Long-standing production assignments were strengthened, and were were given a new responsibility: to develop and produce all ceramic parts used in Mound-build products. progress toward US energy objectives was bolstered by Mound programs supporting the development of nuclear fusion poser, unlocking previously us attainable fossil fuels, ensuring the safety and security of nuclear material handling operations, and exploring the real promise of energy form the sun. In 1978, we focused our attention on many efforts aimed at a brighter, more secure future.
Date: December 31, 1979
Partner: UNT Libraries Government Documents Department

NTS Terminal Waste Storage Project. Annual report, FY 1978 (should have been 1979)

Description: The primary thrust of the NTS Terminal Waste Storage Project during FY 1978 was to continue an evaluation of the suitability of the Nevada Test Site (NTS) for siting a commercial spent fuel or high-level waste repository. At the beginning of the year, three primary issues were identified. They are: (1) is waste isolation at the NTS compatible with weapons testing; (2) are there suitable geohydrologic settings available on the NTS; and (3) are there suitable disposal media available at NTS. The NTS Terminal Waste Storage Project has been organized primarily to address these three issues. The southwestern area of the NTS has been identified as compatible with both current and future weapons testing. The NTS and adjacent areas of southern Nevada contain media which are probably suitable for waste isolation and which occur in a region characterized by long groundwater flow paths through sorptive media. However, utilization of the southwestern part of NTS requires that several geotechnical issues be addressed intensively. These are: (1) the potential for earthquakes at and near NTS; (2) the potential for future volcanism at possible repository sites; (3) the location and nature of faults; and (4) the characterization of the groundwater flow system from possible repository sites to places of discharge. Four potential disposal media available on the NTS were studied during FY 1978. Studies of one of these media, alluvium, were suspended due to the low near-field thermal conductivity. Studies of other potential media, granite, argillite, and tuff, will continue during FY 1979 since it appears that these media could be used for emplacement of commercial spent fuel or high-level waste. Geologic site investigations have and will continue to evaluate areas with these media.
Date: December 31, 1979
Partner: UNT Libraries Government Documents Department

Performance analyses of Elmo Bumpy Torus plasmas and plasma support systems

Description: The development and applcation of the OASIS Code (Operational Analysis of ELMO Bumpy Torus Support and Ignition Systems) for the study of EBT device and plasma performance are presented. The code performs a time-independent, zero-dimensional self-consistent calculation of plasma and plasmasupport systems parameters for the physics and engineering of EBT devices. The features of OASIS modeling for the EBT plasma include: (1) particle balance of the bulk toroidal and electron ring plasma components for experimental (H-H, D-D, He-He etc.) as well as reactor (D-T) devices; (2) energy balance in the bulk and ring plasmas for externally heated or ignition devices; (3) alpha particle effects for reactor devices; (4) auxiliary heating effects, including microwave (ECRH), RF heating (e.g., ICRH), and neutral beam methods; and (5) ignition conditions, including fusion power, alpha power and neutron wall loading. The performance studies using OASIS focussed on variation in plasma and device size and on microwave input power and frequency. An additional study was performed to determine the characteristics of an EBT reactor proof-of-principle device operated with a deuterium-tritium plasma. Sensitivity studies were performed for variation in the input microwave power sharing fractions and the dependence of the bulk n tau scaling law on bulk electron temperature.
Date: December 31, 1979
Creator: Fenstermacher, M. E.
Partner: UNT Libraries Government Documents Department

Petrology of tuff units from the J-13 drill site, Jackass Flats, Nevada

Description: The J-13 drill hole, located in Jackass Flats, Nevada Test Site, has penetrated 125 m of alluvium and 932 m of tuff. Most of the tuff deposits consist of welded tuffs; glass phases in the tuffs have been replaced by authigenic minerals, mainly K-feldspar, silica, and zeolites. The zonation of authigenic minerals, with depth, indictes that alteration of glass phases and filling of vugs occurred during welding and compaction of tuff units soon after deposition and by interaction with groundwater. Zonation of authigenic minerals in tuff deposits at Jackass Flats is similar to mineral zonation in tuffs elsewhere at the Nevada Test Site and in tuff deposits of west Texas. All appear to have been developed by leaching of glass phases and deposition of authigenic minerals in open hydrologic systems. 10 figures, 38 tables.
Date: December 31, 1979
Creator: Heiken, G.H. & Bevier, M.L.
Partner: UNT Libraries Government Documents Department

Preliminary market analysis for customer side of the meter thermal-energy storage

Description: An examination is made of the potential market size for thermal energy storage space heating, water heating, and air conditioning in the residential and commercial sector. It is concluded that a significant market for TES could develop over the next 20 years; the analysis considers the electric utility perspective, the perspective, and the expected market in detail. (MCW)
Date: December 31, 1979
Partner: UNT Libraries Government Documents Department

Projection of Favorable Gas-Producting Areas From Paleoenvironmental Data

Description: Paleoenvironmental biofacies analysis of recent wells in dark Devonian shales in the Applachian Basin has shown that these facies can be projected to areas with no control points. In particular, the facies distribution in Perry County, Kentucky, were found to be precisely those that were predicted earlier from biofacies and organic geochemical data from the VA-1 well in Wise County, Virginia, and the KY-2 well in Martin County, Kentucky. This demonstrates the importance of these data in assessing the volume of gas in the shale throughout the basin as well as in selecting future test sites. The recent biofacies and geochemical work together with a review of the tectonics of the basin have contributed to an evolving interpretation of the geologic control of the biofacies. While a marine environment persisted throughout the Upper Devonian over the Applachian and Illinois Basin (and probably the Michigan Basin), dynamic emergent areas controlled an intermittent introduction of large amounts of organic matter. Large amounts of non-marine organic matter were periodically transported in the basin from a dynamic source province to the Southeast; massive "blooms" of Tasmanites intermittently spread both east and west from the edges of the emerging Cincinnati Arch. At times one or the other of these organic types swept entirely across the basins; at other times a more normal open marine biota flourished and was deposited, probably under the influence of connections to the open seas to the south and northwest, the north being closed by the collision and suturing of continental plates and the east by the growing Applachian Mountains.
Date: December 31, 1979
Creator: Zielinski, R.E.; Dixon, J. A.; McIver, R. D. & Reaugh, A. B.
Partner: UNT Libraries Government Documents Department

Solar photovoltaic/thermal residential systems

Description: The results of a conceptual design study using computer simulations to determine the physical and economic performance of combined photovoltaic/thermal collector heat-pump solar systems for a single-family residence are presented. Economic analyses are based upon projected costs for a 1986 system installation. The results show that PV/T collector systems can be economically competitive for a cold climate residence, that systems employing on-site electrical storage batteries are not economically competitive with utility-interactive systems, and that an ambient-air-source heat-pump system has a lower life-cycle cost than a solar-source heat-pump system.
Date: December 28, 1979
Creator: Russell, M.C.
Partner: UNT Libraries Government Documents Department

Unique rod lens/video system designed to observe flow conditions in emergency core coolant loops of pressurized water reactors

Description: Techniques and equipment are described which are used for video recordings of the single- and two-phase fluid flow tests conducted with the PKL Spool Piece Measurement System designed by Lawrence Livermore Laboratory and EG and G Inc. The instrumented spool piece provides valuable information on what would happen in pressurized water reactor emergency coolant loops should an accident or rupture result in loss of fluid. The complete closed-circuit television video system, including rod lens, light supply, and associated spool mounting fixtures, is discussed in detail. Photographic examples of test flows taken during actual spool piece system operation are shown.
Date: December 28, 1979
Creator: Carter, G.W.
Partner: UNT Libraries Government Documents Department

Semi-annual Progress Report on The Electric Moped

Description: Progress is reported on the feasibility studies of two electric mopeds. One operates on a 12 volt electrical system, and the other on a 24 volt system. Both mopeds are described in detail, and the design and purchase of parts is reported.
Date: December 27, 1979
Creator: Ferschl, M S
Partner: UNT Libraries Government Documents Department

Growth of molten core debris pools in concrete. Part II. A. Pool growth in composite beds; B. Effect of overlaying steel layers. Final report, March 1, 1978-September 30, 1979. [LMFBR]

Description: The heat and mass transfer processes taking place in molten core debris/concrete systems have been experimentally investigated. Two types of experiments have been conducted. The first experiment simulates the growth of a molten debris pool in a composite sacrificial bed. This experiment models debris pool growth in an inner, low-melting point, sacrificial material zone followed by a melting attack on the concrete bed. The purpose of the inner zone is to quickly melt and dilute the debris pool so that its subsequent downward growth in the concrete may be slowed. In the second experiment a two-layer immiscible liquid system is volumetrically heated and allowed to melt into a low-density gas releasing solid bed which is miscible in the initially-higher-density bottom liquid. The solid melts, mixes with, and dilutes the bottom liquid pool until its density is lower than that of the top liquid.
Date: December 26, 1979
Creator: Abdel-Khalik, S I
Partner: UNT Libraries Government Documents Department

Regulatable elements in the high-level waste management program

Description: Regulatable elements of a deep geological nuclear waste isolation system are those characteristics of a candidate system which need to be specified to achieve control of its performance. This report identifies the regulatable elements with respect to waste form, repository design, site suitability, and the modeling and decision analysis processes. Regulatable elements in each section are listed and described briefly as they affect the short-term and long-term performance of a deep geological repository.
Date: December 26, 1979
Creator: Oakley, D.
Partner: UNT Libraries Government Documents Department

Use of a General Nonlinear Least-Squares Curve Fitting Program With Nonclosed Form Relationships. [GNLS, in FORTRAN for CDC Computers]

Description: A use for GNLS, a general nonlinear least-squares curve fitting program, is presented. In this use GNLS determines a set of best parameters for relationships that cannot be written in closed form. This program can be useful for experimenters who need to determine experimental parameters by fitting nonclosed-form relationships to experimental data. Two examples are given to indicate how GNLS can be used for this type of problem. 11 figures.
Date: December 26, 1979
Creator: Abey, A. E.
Partner: UNT Libraries Government Documents Department

Analysis of thermal efficiency for hydrogasification and gasification/methanation

Description: To confirm the potentially greater thermodynamic efficiency of hydrogasification, a study was made of carbon conversion and resulting thermal efficiency of methane production via hydrogasification as compared to gasification/methanation. The alternative systems were first compared on an ideal process basis. This approach neglects limitations imposed by the thermodynamics and kinetics of the various chemical reactions and indicates maximum potential conversion of coal to methane. These results were then compared with similar data for commercial plant designs developed for each of the processes that take into account system inefficiencies and thermodynamic restraints. Ideally, carbon conversions of 20 to 30% higher than given by gasification/methanation can be achieved by hydrogasification, resulting in 20 to 30% higher thermal efficiencies. Unfortunately, the full extent of this advantage is not realized because the carbon-hydrogen-methane reaction equilibrium is not favorable to high methane concentrations at the high temperatures required for gasification of coal in a single stage process. This limitation is overcome by the use of a large excess of hydrogen, which favors increased carbon conversion within the required gasification temperature range but reduces thermal efficiency. A comparison of both the cold gas (methane production only) and overall (methane plus byproducts) thermal efficiencies for the conceptual plant design developed by UOP/SDC for the Rockwell process with a similar plant design published for the Lurgi gasification/methanation process does, however, show about a 5% higher thermal efficiency for the Rockwell hydrogasification process.
Date: December 21, 1979
Creator: DiNapoli, R.N.
Partner: UNT Libraries Government Documents Department