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Final Report of Modeling of CWM Droplet Combustion

Description: The objective of the present study was to develop a one-dimensional, unsteady state model for coal-water mixture droplet combustion, and to compare the characteristic times for the various processes, such as water vaporization, devolatilization and char oxidation with available experimental data. A water film surrounding a spherical coal particle is considered to undergo vaporization by heat transfer from the hot air. After the water vaporization is complete, devolatilization begins. This proce… more
Date: October 1, 1983
Creator: Pandalai, Krish; Aggarwal, Suresh & Sirignano, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid waste handling facilities for a conceptual LWR spent fuel reprocessing complex

Description: The waste evaporator systems and the methods for evaporating the liquid wastes of various radioactivity levels are discussed. After the liquid wastes are evaporated and nitric acid is recovered the high-level liquid waste is incorporated into borosilicate glass and the intermediate-level liquid waste into concrete for final disposal. (LK)
Date: January 1, 1978
Creator: Witt, D.C. & Bradley, R.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cadmium sulfide/copper ternary heterojunction cell research. Final report, January 8, 1979-June 7, 1980

Description: Dual source, Se and CuInSe/sub 2/, coevaporation and flash evaporation of stoichiometric CuInSe/sub 2/ powder were investigated to develop a process of fabricating large area CdS/CuInSe/sub 2/ heterojunction solar cells. CuInSe/sub 2/ was seen to decompose upon evaporation, producing layered films in the dual source system. Annealing of these films and alternative dual sources have been considered. Single phase p type films have been produced but no devices have been made from such films. Flash… more
Date: January 1, 1980
Creator: Fleming, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Open cycle OTEC system with falling jet evaporator and condenser

Description: A configuration for the open cycle (OC) Ocean Thermal Energy Conversion (OTEC) system is presented incorporating a countercurrent falling jet evaporator and a concurrent falling jet condenser. The parameters governing performance of the proposed configuration are discussed and the sizing of equipment for a 100-MWe net power output OC OTEC plant is performed, based on recent experimental falling jet heat and mass transfer results. The performance of an OC OTEC plant with falling jet evaporator-c… more
Date: July 1, 1980
Creator: Kogan, A.; Johnson, D. H.; Green, H. J. & Olson, D. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Flashing inception in flowing liquids

Description: The inception of net vaporization in flashing flows is examined. It is suggested that the flashing inception can be expressed as two additive effects. One is due to the static decompression which is a function of the initial temperature and also of the expansion rate. The other effect which is a function of Reynolds number and flashing index, is due to the turbulent fluctuations of the flowing liquid. It is shown that by taking a three standard deviation band on the turbulent velocity fluctuati… more
Date: April 1, 1980
Creator: Jones, O. C., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Active layer hydrology for Imnavait Creek, Toolik, Alaska

Description: The hydrology of the active layer of a watershed is described. In the annual hydrologic cycle, snowmelt is the most significant event at Imnavait Creek located near Toolik Lake, Alaska. Precipitation that has accumulated for more than 6 months on the surface melts in a relatively short period of 7 to 10 days once sustained melting occurs. Significant runoff events are few. Convective storms covering relatively small areas on the North Slope of Alaska can produce significant small-scale events i… more
Date: April 1, 1987
Creator: Hinzman, L.D. & Kane, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Open-cycle OTEC system performance analysis. [Claude cycle]

Description: An algorithm developed to calculate the performance of Claude-Cycle ocean thermal energy conversion (OTEC) systems is described. The algorithm treats each component of the system separately and then interfaces them to form a complete system, allowing a component to be changed without changing the rest of the algorithm. Two components that are subject to change are the evaporator and condenser. For this study we developed mathematical models of a channel-flow evaporator and both a horizontal jet… more
Date: October 1, 1980
Creator: Lewandowski, A.A.; Olson, D.A. & Johnson, D.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Installation restoration program: Hydrologic measurements with an estimated hydrologic budget for the Joliet Army Ammunition Plant, Joliet, Illinois. [Contains maps of monitoring well locations, topography and hydrologic basins]

Description: Hydrologic data were gathered from the 36.8-mi{sup 2} Joliet Army Ammunition Plant (JAAP) located in Joliet, Illinois. Surface water levels were measured continuously, and groundwater levels were measured monthly. The resulting information was entered into a database that could be used as part of numerical flow model validation for the site. Deep sandstone aquifers supply much of the water in the JAAP region. These aquifers are successively overlain by confining shales and a dolomite aquifer of… more
Date: July 1, 1991
Creator: Diodato, D. M.; Cho, H. E. & Sundell, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear materials research progress reports for 1979

Description: Research is presented concerning iodide stress corrosion cracking of zircaloy, self-diffusion of oxygen in hypostoichiometric urania, surface chemistry of epitaxial silicon deposition by thermal cracking of silane, kinetics of laser pulse vaporization of UO/sub 2/, gas laser model for laser induced evaporation, solubility of hydrogen in uranium dioxide, thermal gradient migration of metallic inclusions in UO/sub 2/, molecular beam studies of atomic hydrogen reduction of oxides, and thermal grad… more
Date: December 1, 1979
Creator: Olander, D.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Arctic hydrology and meteorology

Description: The behavior of arctic ecosystems is directly related to the ongoing physical processes of heat and mass transfer. Furthermore, this system undergoes very large fluctuations in the surface energy balance. The buffering effect of both snow and the surface organic soils can be seen by looking at the surface and 40 cm soil temperatures. The active layer, that surface zone above the permafrost table, is either continually freezing or thawing. A large percentage of energy into and out of a watershed… more
Date: January 1, 1988
Creator: Kane, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrological and geochemical investigations of selenium behavior at Kesterson Reservoir

Description: From 1985 to the present we have studied the behavior of selenium in various habitats and environments at Kesterson reservoir, shifting emphasis as remedial actions altered the physical setting. Investigations have evaluated the efficacy of several remedial alternatives, from innovative techniques relying on the complex geochemical behavior of selenium alternatives, from innovative techniques relying on the complex geochemical behavior of selenium in aquatic environments to conventional excavat… more
Date: October 1, 1990
Creator: Benson, S. M.; Tokunaga, T. K.; Zawislanski, P.; Yee, A. W.; Daggett, J. S.; Oldfather, J. M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of copper sulfide/cadmium sulfide thin film solar cells. First technical progress report, 13 July 1979 to 12 October 1979

Description: Preparation of CdS films by evaporation from a single graphite source, as generally used by the Institute of Energy Conversion (IEC) group at the University of Delaware, has been implemented. Previously at Westinghouse, four evaporation sources were used to permit uniform coverage of large area substrates. The graphite source used in this period is somewhat smaller than the IEC design to permit accommodation to the heater geometry currently available. Initial efforts with the single source evap… more
Date: February 14, 1980
Creator: Szedon, J. R.; Shirland, F. A.; Stoll, J. A. & Dickey, H. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A comparison of three self-tuning control algorithms developed for the Bristol-Babcock controller

Description: A brief overview of adaptive control methods relating to the design of self-tuning proportional-integral-derivative (PID) controllers is given. The methods discussed include gain scheduling, self-tuning, auto-tuning, and model-reference adaptive control systems. Several process identification and parameter adjustment methods are discussed. Characteristics of the two most common types of self-tuning controllers implemented by industry (i.e., pattern recognition and process identification) are su… more
Date: April 1, 1992
Creator: Tapp, P.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evapotranspiration studies for protective barriers: FY 1990 status report

Description: Pacific Northwest Laboratory (PNL) and Westinghouse Hanford Company (Westinghouse Hanford) are working together to develop for the US Department of Energy (DOE) protective barriers for the near-surface disposal of hazardous waste at the Hanford Site. The proposed barrier design consists of a layer of fine-textured soil overlying a series of layers grading from sand to basalt riprap. A multiyear research program is being conducted to assess the long-term performance of barrier configurations in … more
Date: May 1, 1992
Creator: Link, S.O.; Downs, J.L.; Thiede, M.E.; Lettau, D.J.; Twaddell, T.R. (Pacific Northwest Lab., Richland, WA (United States)) & Black, R.A. (Washington State Univ., Pullman, WA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Shale-oil-wastewater treatment by evaporation

Description: Experimental studies were performed to assess the feasibility of using evaporation to treat oil shale retort water. Retort wastewaters from an in situ shale oil site near Vernal, Utah, were used in this study. This wastewater has a chemical oxygen demand (COD) of 7000 mg/L, total organic carbon (TOC) of 2000 mg/L, and ammonia concentrations of 1600 mg/L. Data for this study were collected from a bench-model evaporator with a 95 L/day capacity. Preliminary results show that reductions of 90% in … more
Date: January 1, 1980
Creator: Wakamiya, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cultivation of Macroscopic Marine Algae and Freshwater Aquatic Needs. Progress Report, May 1, 1979-December 15, 1979

Description: Progress for the period May 1979 to December 1979 is reported in the following subject areas: (1) the ORCA clone of the red seaweed Gracilaria tikvakiae has now been grown continuously in tank culture for two years; (2) studies were continued on the culture of freshwater plants such as water hyacinth, pennywort, water lettuce, and duckweed; (3) the loss of water from evapotranspiration of freshwater plants was measured and compared with water loss from evaporation from open water; and (4) exper… more
Date: January 1, 1980
Creator: Ryther, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Using computers to answer fundamental questions in combustion theory: an example from droplet combustion

Description: Many fundamental questions in combustion theory are either partially or totally intractable analytically. Thus, it is often desirable to use computed results to supplement information obtained by analytic means. We illustrate how computation can supplement analysis by examining the role of gas-phase unsteadiness in droplet vaporization and combustion. 9 refs., 4 figs., 2 tabs.
Date: January 1, 1985
Creator: Janssen, R.D. & O'Rourke, P.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Chemical Technology Division, Annual technical report, 1991

Description: Highlights of the Chemical Technology (CMT) Division's activities during 1991 are presented. In this period, CMT conducted research and development in the following areas: (1) electrochemical technology, including advanced batteries and fuel cells; (2) technology for fluidized-bed combustion and coal-fired magnetohydrodynamics; (3) methods for treatment of hazardous and mixed hazardous/radioactive waste; (4) the reaction of nuclear waste glass and spent fuel under conditions expected for an uns… more
Date: March 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Condensation processes in coal combustion products. Progress report, July 1, 1979-June 30, 1980

Description: Slag vaporization is a serious problem in high-temperature coal combustion and gasification processes. Cooling of process gas streams causes the slag vapors to condense, but they do not necessarily do so at equilibrium. Predicting the compositions and properties of the condensing species requires modeling the nucleation processes occurring in these systems. This is a report on our progress toward modeling this nucleation process and toward implementing the model with a computer code suitable fo… more
Date: April 1, 1980
Creator: Katz, J. L. & Donohue, M. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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(Investigation of low-cost solar cells based on Cu/sub 2/O). Third quarterly progress report, November 1, 1979-January 31, 1980

Description: Efforts this quarter concentrated on completion and check-out of the MBE system, deposition of ZnS films, analysis of the internal photoresponse for Cu-Cu/sub 2/O cells, and fabrication and characterization of Cu-Cu/sub 2/O solar cells. In-doped ZnS films with very good optical quality and finite conductivity were obtained by co-depositing In and ZnS. Analysis of the internal photoresponse indicated that minority carrier diffusion lengths on the order of 10 ..mu..m are being achieved with the p… more
Date: March 12, 1980
Creator: Olsen, L. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthesis, evaluation and defect compensation of tetrahedral glasses as possible solar cell materials. Final report, February 1, 1979-April 30, 1980

Description: The work reported was directed towards evaluation of new amorphous compounds for application in solar cells. The ternary A/sup II/B/sup IV/C/sub 2//sup V/ chalcopyrite systems were selected because of their inexpensive constituent elements and tetrahedral geometry. Polycrystalline samples of the ternary arsenides with Cd and Zn as the group II element and Ge, Si, Sn as the group IV element were synthesized. Thin films were deposited by vacuum evaporation of the bulk ternary arsenides. The stoic… more
Date: April 1, 1980
Creator: Rauh, R. D.; Rose, T. L. & Scoville, A. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Indium phosphide/cadmium sulfide thin-film solar cells. Quarterly technical progress report No. 1, June 1979-August 1979

Description: Cadmium sulfide and InP thin films were prepared by thermal evaporation and planar reactive deposition, respectively. Polycrystalline CdS films up to 10 ..mu..m thick showed absorption losses of less than 10% over the 0.6- to 1.0-..mu..m wavelength range. A threefold increase in lateral grain size was achieved when CdS/ITO/GLASS structures were partially recrystallized in flowing H/sub 2/S/Ar at 550/sup 0/C. InP deposited onto (100) InP semiinsulating substrate at substrate temperatures as low … more
Date: November 1, 1979
Creator: Zanio, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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