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Survey of absorption cooling technology in solar applications

Description: A comprehensive survey of the current state of the absorption cooling technology has been conducted. This survey discusses the basic and applied absorption cooling/heating technology, analyses the current state of the art including the discussion of limitations and possible solutions, identifies areas where promising developments are indicated, lists the current products and activities of the absorption industry, and presents the current RD and D efforts of the U.S. government. The main subject… more
Date: July 1, 1977
Creator: Auh, P C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical composition of atmospheric precipitation in Minnesota and North Dakota. Final report, July 1, 1977-Jun 30, 1980

Description: Precipitation chemistry in central North American appears to e controlled by interaction between soil-derived alkaline dust and gaseous NH/sub 3/ from the cultivated prairie and anthropogenic acid aerosols from the urban-industrial Lower Great Lakes-Ohio Valley region. Analyses of major ions and trace metals in precipitation event and snow core samples along a 600-km transect from the North Dakota prairie to the northeastern Minnesota forest indicate that loadings and concentrations of Ca/sup +… more
Date: July 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reactor Materials Study. Research and Development of Metal Hydrides. Quarterly Report No. 7 for April 1, 1960 to June 30, 1960

Description: High-temperature x-ray diffraction experiments provided confirming evidence regarding the origin of the metastable gamma phase and of the general features of the zirconiumhydrogen phase system. These experiments also showed that the reaction alpha + delta -- beta (the eutectoid reactlon on heating) proceeds at an extraordinarily slow rate, although the reverse reaction proceeds so rapidly that beta phase cannot be retained to room temperature by quenching. The sluggishness of the eutectoid reac… more
Date: July 1, 1960
Creator: Beck, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thin film polycrystalline silicon solar cells: first technical progress report, April 15, 1980-July 15, 1980

Description: The objectives of this contract are to fabricate large area thin film silicon solar cells with AM1 efficiency of 10% or greater with good reproducibility and good yield and to assess the feasibility of implementing this process for manufacturing solar cells at a cost of $300/kWe. Efforts during the past quarter have been directed to the purification of metallurgical silicon, the preparation of substrates, and the fabrication and characterization of solar cells. The partial purification of metal… more
Date: July 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ZrH-reactor-technology program. Progress report, April-June 1974

Description: The report on the 2 kW(e) reactor-organic Rankine system was drafted. This report details the design parameters of a minimum weight, 2 kW(e) reactor-organic Rankine system. The system is designed for 5 years unattended life in space. The reactor produces 16.2 kW of thermal power with a NaK outlet temperature of 800/sup 0/F and a 200/sup 0/F ..delta..T. The reactor contains 19 fuel elements, 1.25'' in diameter by 10'' long, hydrided to an N/sub H/ of 6.35. The terrestrial applications effort was… more
Date: July 12, 1974
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Technical and economic assessment of the use of ammonia expanders for energy recovery in air-cooled power plants

Description: Binary cycle power plants have been the subject of much discussion among engineers and scientists for nearly 100 years. Current economic and environmental concerns have stimulated new interest and research. Ammonia has been recommended by other studies as the leading contender for use as simply the heat rejection medium in an air-cooled power plant. This study investigates the technical feasibility and economic potential of including an expander in the heat rejection system of an air-cooled pow… more
Date: July 1, 1982
Creator: Hauser, S. G.; Hane, G. J. & Johnson, B. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Continuation of systems study of fuels from grasses and grains: Phase 2 and Phase 3. Final report

Description: Results are presented of an investigation of biomass-derived fuels from grasses and grains. A region-by-region analysis of biomass production, with both the present (near-term) and the future (mid-term) being considered is presented. The overall approach for analysis of the near-term involved least cost analysis of production, transportation, and energy conversion. The mid-term analyses were structured around the assumed implementation of modified crop production systems in which land was more … more
Date: July 31, 1979
Creator: McElroy, A. D.; Tinberg, C.; Davis, M.; Snyder, M. & Allen, A. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transmission Electron Microscopy Study of InN Nanorods

Description: InN nanorods were grown on a, c-, and r-plane of sapphire and also on Si (111) and GaN (0001) by non-catalytic, template-free hydride metal-organic vapor phase epitaxy and studied by transmission electron microscopy, electron energy loss (EELS) and photoluminescence (PL) at room temperature. These nanocrystals have different shapes and different faceting depending on the substrate used and their crystallographic orientation. EELS measurements have confirmed the high purity of these crystals. Th… more
Date: July 13, 2006
Creator: Liliental-Weber, Z.; Li, X.; Kryliouk, Olga; Park, H.J.; Mangum,J. & Anderson, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

TRITIUM BARRIER MATERIALS AND SEPARATION SYSTEMS FOR THE NGNP

Description: Contamination of downstream hydrogen production plants or other users of high-temperature heat is a concern of the Next Generation Nuclear Plant (NGNP) Project. Due to the high operating temperatures of the NGNP (850-900 C outlet temperature), tritium produced in the nuclear reactor can permeate through heat exchangers to reach the hydrogen production plant, where it can become incorporated into process chemicals or the hydrogen product. The concentration limit for tritium in the hydrogen produ… more
Date: July 17, 2008
Creator: Sherman, S & Thad Adams, T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Occupational hazards associated with geothermal energy

Description: Exposure to noise, H{sub 2}S, NH/sub 3/, hazardous chemicals and wastes, and heat are the major occupational health hazards associated with geothermal energy development - from drilling to power production. Exposures to these agents, although not unique to geothermal energy development, occur in situations peculiar to the industry. Reports show that occupational illnesses associated with geothermal energy development are increasing, while the corresponding rates from all power production are de… more
Date: July 20, 1979
Creator: Hahn, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Applications of pulsed nuclear magnetic resonance to chemistry: multiple-pulse NMR, cross polarization, magic-angle spinning annd instrumental design

Description: Pulsed Nuclear Magnetic Resonance (NMR) has been applied to: (1) Measurements of the prinicpal components of the proton shielding tensors of the hydrides of zirconium chloride and zirconium bromide. Multiple-Pulse techniques have been used to remove static homonuclear dipolar coupling. The anisotropies and isotropic shifts of these tensors have been used to infer the possible locations of the hydrogen within the sandwich-like layers of these unusual compounds. (2) Studies of the oscillatory tra… more
Date: July 1, 1979
Creator: Murphy, P.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrical Conductivity and Equation of State Measurements on Planetary Fluids at High Pressures and Temperatures

Description: Hugoniot equation-of-state, shock temperature, and electrical conductivity measurements are reported for fluids believed to be the primary constituents of the planets Uranus and Neptune. The equation-of-state results are compared with calculations performed using a statistical mechanical, chemical equilibrium computer code and electrical conductivities are discussed in terms of the recently measured magnetic field of Uranus. 4 refs., 2 figs., 1 tab.
Date: July 1, 1987
Creator: Hamilton, D. C.; Nellis, W. J.; Holmes, N. C.; Radousky, H. B.; Ree, F. H. & Nicol, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low-cost thin-film polycrystalline silicon solar cells. Quarterly project report No. 1, March 15, 1979-June 30, 1979

Description: The objective of this contract is to advance the thin film silicon solar cell technology developed at Southern Methodist University, Dallas, Texas, with a view toward achieving photovoltaic conversion efficiencies greater than 10% at a cost of $100 to $300/kWe. The technology developed at SMU consists of: (1) the purification of metallurgical silicon by acid extraction and phosphorus pentoxide treatment, (2) the preparation of metallurgical silicon substrates by the unidirectional solidificatio… more
Date: July 1, 1979
Creator: Crownover, J. D. & van der Leeden, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Novel neutralized-beam intense neutron source for fusion technology development

Description: We describe a neutralized-beam intense neutron source (NBINS) as a relevant application of fusion technology for the type of high-current ion sources and neutral beamlines now being developed for heating and fueling of magnetic-fusion-energy confinement systems. This near-term application would support parallel development of highly reliable steady-state higher-voltage neutral D/sup 0/ and T/sup 0/ beams and provide a relatively inexpensive source of fusion neutrons for materials testing at up … more
Date: July 8, 1983
Creator: Osher, J.E. & Perkins, L.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of continuous oxydesulfurization processes. Final technical report, September 1979-July 1981

Description: Three processes developed by Pittsburgh Energy Technology Center (PETC), Ledgemont Laboratories, and Ames Laboratories for the oxydesulfurization of coal were evaluated in continuous processing equipment designed, built, and/or adapted for the purpose at the DOE-owned Multi-Use Fuels and Energy Processes Test Plant (MEP) located at TRW's Capistrano Test Site in California. The three processes differed primarily in the chemical additives (none, sodium carbonate, or ammonia), fed to the 20% to 40… more
Date: July 1, 1981
Creator: Jones, J. F. & Wever, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Survey of biomass gasification. Volume I. Synopsis and executive summary

Description: Biomass can be converted by gasification into a clean-burning gaseous fuel that can be used to retrofit existing gas/oil boilers, to power engines, to generate electricity, and as a base for synthesis of methanol, gasoline, ammonia, or methane. This survey describes biomass gasification, associated technologies and issues in three volumes. Volume I contains the synopsis and executive summary, giving highlights of the findings of the other volumes. In Volume II, the technical background necessar… more
Date: July 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sub-gap and band edge optical absorption in a-Si:H by photothermal deflection spectroscopy

Description: Using photothermal deflection spectroscopy, the optical absorption of various a-Si:H films was investigated in the range of 2.1 to 0.6 eV. An absorption shoulder which depends on deposition conditions and on doping was found and was attributed to dangling bonds. The exponential edge broadens with increasing spin density.
Date: July 1, 1981
Creator: Jackson, W.B. & Amer, N.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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1986 wet deposition temporal and spatial patterns in North America

Description: The focus of this report is on North American wet deposition temporal patterns from 1979 to 1986 and spatial patterns for 1986. The report provides statistical distribution summaries of annual precipitation-weighted average concentration and annual deposition for nine ion species: hydrogen, sulfate, nitrate, ammonium, calcium, chloride, sodium, potassium, and magnesium. The data in the report are from the Acid Depositing System (ADS) for the statistical reporting of North American deposition da… more
Date: July 1, 1989
Creator: Olsen, A.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Survey of biomass gasification. Volume II. Principles of gasification

Description: Biomass can be converted by gasification into a clean-burning gaseous fuel that can be used to retrofit existing gas/oil boilers, to power engines, to generate electricity, and as a base for synthesis of methanol, gasoline, ammonia, or methane. This survey describes biomass gasification, associated technologies, and issues in three volumes. Volume I contains the synopsis and executive summary, giving highlights of the findings of the other volumes. In Volume II the technical background necessar… more
Date: July 1, 1979
Creator: Reed, T.B. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low-Cost Solar Array Project. Task I. Silicon material: investigation of the hydrogenation of SiCl/sub 4/. Quarterly report

Description: A program was initiated in April of this year to study the hydrogenation of silicon tetrachloride to trichlorosilane, 3 SiCl/sub 4/ + 2 H/sub 2/ + Si reversible 4 SiHCl/sub 3/. This contract is conducted as a complementary research and development program to supplement the engineering process development activities for the process-unit under Union Carbide Contract No. 954 334. Two parallel efforts are included in the submitted program plan. One is a process study to collect reaction kinetic dat… more
Date: July 12, 1979
Creator: Mui, J. Y. P. & Seyferth, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

OTEC performance tests of the Carnegie-Mellon University vertical fluted-tube evaporator

Description: Performance tests were conducted with the Carnegie-Mellon University (C-MU) vertical fluted-tube evaporator. Under nominal operating conditions (3200 gpm water flow, 3.2 million Btu/hr heat duty, and 100 gpm ammonia feed rate), the overall heat transfer coefficient (U/sub 0/) was 825 Btu/hr ft/sup 2/ /sup 0/F and the ammonia-side and water-side heat transfer coefficients were 1800 and 2610 Btu/hr ft/sup 2/ /sup 0/F, respectively. The water-side pressure drop was 3.2 psi. Tests were conducted at… more
Date: July 1, 1979
Creator: Lorenz, J J; Yung, D T; Hillis, D L & Sather, N F
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of laboratory apparatus dedicated to the study of hydride--dehydride reactions. [LiAlH/sub 4/; NiZr]

Description: Hydrogen-compatible laboratory apparatus has been designed and developed to study hydride--dehydride reactions at elevated pressures and temperatures. The system has operated at pressures and temperatures up to 34 MPa and 550/sup 0/C during experiments conducted on LiAlH/sub 4/ and NiZr. Instrumentation incorporated into the system also allows differential thermal analysis and acoustic emission data to be collected as the chemical reactions progress. 13 figures.
Date: July 1, 1979
Creator: Wemple, R. P. & Kass, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced heat pump cycle

Description: The desorption and absorption process of a vapor compression heat pump with a solution circuit (VCHSC) proceeds at gliding temperature intervals, which can be adjusted over a wide range. In case that the gliding temperature intervals in the desorber and the absorber overlap, a modification of the VCHSC employing a desorber/absorber heat exchange (DAHX) can be introduced, which results in an extreme reduction of the pressure ratio. Although the DAHX-cycle has features of a two-stage cycle, it st… more
Date: July 1, 1993
Creator: Groll, E.A. & Radermacher, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of standardized air-blown coal gasifier/gas turbine concepts for future electric power systems

Description: CRS Sirrine (CRSS) is evaluating a novel IGCC process in which gases exiting the gasifier are burned in a gas turbine combustion system. The turbine exhaust gas is used to generate additional power in a conventional steam generator. This results in a significant increase in efficiency. However, the IGCC process requires development of novel approaches to control SO{sub 2} and NO{sub x} emissions and alkali vapors which can damage downstream turbine components. Ammonia is produced from the react… more
Date: July 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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