Uranium in Granites From the Southwestern United States: Actinide Parent-Daughter Systems, Sites and Mobilization: First Year Report, [Color Figures]

Color copies of photomicrograph figures that accompany a report studying uranium in granites in the southwestern United States.
Date: October 1980
Creator: Silver, L. T.; Williams, I. S. & Woodhead, J. A.
Object Type: Image
System: The UNT Digital Library
Proceedings of the conference on research for the development of geothermal energy resources held in Pasadena, California, September 23--25, 1974 (open access)

Proceedings of the conference on research for the development of geothermal energy resources held in Pasadena, California, September 23--25, 1974

None
Date: December 31, 1974
Creator: unknown
Object Type: Article
System: The UNT Digital Library
Fixed tilt solar collector employing reversible vee-trough reflectors and vacuum tube receivers for solar heating and cooling systems. Final report. JPL Publication 77-78 (open access)

Fixed tilt solar collector employing reversible vee-trough reflectors and vacuum tube receivers for solar heating and cooling systems. Final report. JPL Publication 77-78

The objective of the Vee-Trough/Vacuum Tube Collector (VTVTC) Project was to prove the usefulness of vee-trough concentrators in improving the efficiency and reducing the cost of collectors assembled from evacuated tube receivers. The VTVTC was analyzed rigorously and various mathematical models were developed to calculate the optical performance of the vee-trough concentrator and the thermal performance of the evacuated tube receiver. A test bed was constructed to verify the mathematical analyses and compare reflectors made out of glass, Alzak and aluminized FEP Teflon. Tests were run at temperatures ranging from 95 to 180/sup 0/C during the months of April, May, June, July and August 1977. Vee-trough collector efficiencies of 35 to 40% were observed at an operating temperature of about 175/sup 0/C. Test results compared well with the calculated values. Test data covering a complete day are presented for selected dates throughout the test season. Predicted daily useful heat collection and efficiency values are presented for a year's duration at operation temperatures ranging from 65 to 230/sup 0/C. Estimated collector costs and resulting thermal energy costs are presented. Analytical and experimental results are discussed along with a complete economic evaulation. Recommendations for the continuation of the project are presented.
Date: December 1, 1977
Creator: Selcuk, M. K.
Object Type: Report
System: The UNT Digital Library
Evaluation and verification of epitaxial process sequence for silicon solar-cell production. Final program summary report (open access)

Evaluation and verification of epitaxial process sequence for silicon solar-cell production. Final program summary report

Progress, present status, and data are presented for work in the areas of silicon substrate materials epitaxial substrates and epitaxial growth and of solar cells production process sequence determination especially, and also in the areas of process specification, minimodule design, process and design verification, and cost evaluation and projections. (LEW)
Date: November 1, 1981
Creator: Redfield, D.
Object Type: Report
System: The UNT Digital Library
Helical Screw Expander Evaluation Project. Final report (open access)

Helical Screw Expander Evaluation Project. Final report

A functional 1-MW geothermal electric power plant that featured a helical screw expander was produced and then tested in Utah in 1978 to 1979 with a demonstrated average performance of approximately 45% machine efficiency over a wide range of test conditions in noncondensing operation on two-phase geothermal fluids. The Project also produced a computer-equipped data system, an instrumentation and control van, and a 1000-kW variable load bank, all integrated into a test array designed for operation at a variety of remote test sites. Additional testing was performed in Mexico in 1980 under a cooperative test program using the same test array, and machine efficiency was measured at 62% maximum with the rotors partially coated with scale, compared with approximately 54% maximum in Utah with uncoated rotors, confirming the importance of scale deposits within the machine on performance. Data are presented for the Utah testing and for the noncondensing phases of the testing in Mexico. Test time logged was 437 hours during the Utah tests and 1101 hours during the Mexico tests.
Date: March 1, 1982
Creator: McKay, R.
Object Type: Report
System: The UNT Digital Library
Development of alternative oxygen production source using a zirconia solid electrolyte membrane (open access)

Development of alternative oxygen production source using a zirconia solid electrolyte membrane

The objective of this multiyear effort was the development, fabrication and testing of a zirconia oxygen production module capable of delivering approximately 100 liters/minute (LPM) of oxygen. The work discussed in this report consists of development and improvement of the zirconia cell along with manufacture of cell components, preliminary design of the final plant, additional economic analysis and industrial participation. (VC)
Date: August 1, 1990
Creator: Suitor, J. W.; Clark, D. J. & Losey, R. W.
Object Type: Report
System: The UNT Digital Library
Energy conservation in citrus processing. Technical progress report, October 1, 1979-March 31, 1980 (open access)

Energy conservation in citrus processing. Technical progress report, October 1, 1979-March 31, 1980

The Sunkist Citrus Plant in Ontario, California, processes about 6 million pounds of citrus fruit per day to make products which include frozen concentrated juice; chilled, pasteurized, natural strength juice; molasses from peel; dried meal from peel; pectin; citrus oil; and bioflavonoids. The energy intensive operations at the plant include concentration, drying, and refrigeration. The objective of the two-year two-phase project is to identify an economically viable alternative to the existing method of meeting energy requirements. Progress on the technical work of Phase I is reported. The following are summarized: requirements (energy price projection, atmospheric emission requirements, citrus juice quality constraints, economic evaluations); characterization (basic citrus processing operations, energy consumption and fruit processed vs time, identification and measurement of energy uses, energy balance for a typical citrus juice evaporator); and thermodynamic analysis (heat pump model, thermal evaporator, and co-generation model).
Date: June 15, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Direct Conversion Technology (open access)

Direct Conversion Technology

The overall objective of the Direct Conversion Technology task is to develop an experimentally verified technology base for promising direct conversion systems that have potential application for energy conservation in the end-use sectors. Initially, two systems were selected for exploratory research and advanced development. These are Alkali Metal Thermal-to-Electric Converter (AMTEC) and Two-Phase Liquid Metal MD Generator (LMMHD). This report describes progress that has been made during the first six months of 1992 on research activities associated with these two systems. (GHH)
Date: July 1, 1992
Creator: Back, L.H.; Fabris, G. & Ryan, M.A.
Object Type: Report
System: The UNT Digital Library
Theory and tests of two-phase turbines (open access)

Theory and tests of two-phase turbines

Two-phase turbines open the possibility of new types of power cycles operating with extremely wet mixtures of steam and water, organic fluids, or immiscible liquids and gases. Possible applications are geothermal power, waste-heat recovery, refrigerant expansion, solar conversion, transportation turbine engines, and engine bottoming cycles. A theoretical model for two-phase impulse turbines was developed. Apparatus was constructed for testing one- and two-stage turbines (using speed decrease from stage to stage). Turbines were tested with water-and-nitrogen mixtures and Refrigerant 22. Nozzle efficiencies were 0.78 (measured) and 0.72 (theoretical) for water-and-nitrogen mixtures at a water/nitrogen mixture ratio of 68, by mass; and 0.89 (measured) and 0.84 (theoretical) for Refrigerant 22 expanding from 0.02 quality to 0.28 quality. Blade efficiencies (shaft power before windage and bearing loss divided by nozzle jet power) were 0.63 (measured) and 0.71 (theoretical) for water-and-nitrogen mixtures and 0.62 (measured) and 0.63 (theoretical) for Refrigerant 22 with a single-stage turbine, and 0.70 (measured) and 0.85 (theoretical) for water-and-nitrogen mixtures with a two-stage turbine.
Date: March 15, 1982
Creator: Elliot, D.G.
Object Type: Report
System: The UNT Digital Library
Litigation - Sierra Club v. Babbit - Edwards Aquifer (open access)

Litigation - Sierra Club v. Babbit - Edwards Aquifer

Litigation - Sierra Club v. Babbit - Edwards Aquifer. Box 61, GC-005.
Date: unknown
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
Navy Data Calls - San Bruno, CA; San Jose, CA; San Bernardino, CA (open access)

Navy Data Calls - San Bruno, CA; San Jose, CA; San Bernardino, CA

Navy Data Calls - San Bruno, CA; San Jose, CA; San Bernardino, CA. Box 222, L-154.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Naval Research and Development Center, San Diego - Data Calls (open access)

Naval Research and Development Center, San Diego - Data Calls

Naval Research and Development Center, San Diego - Data Calls. Box 252, N-013.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Naval Amphibious Base, Coronado, CA - Data Call (open access)

Naval Amphibious Base, Coronado, CA - Data Call

Naval Amphibious Base, Coronado, CA - Data Call. Box 192, L-124.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Navy Data Call - NWAD (open access)

Navy Data Call - NWAD

Navy Data Call - NWAD. Military Value Analysis. Box 260, N-027.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Navy - Corona, CA (open access)

Navy - Corona, CA

Navy - Corona, CA. Environmental Data Call. Box 260, N-027.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Navy - Corona, CA (open access)

Navy - Corona, CA

Navy - Corona, CA. Response to Inquiries. Box 260, N-027.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Navy Correspondence (open access)

Navy Correspondence

Navy Correspondence. NWAD Corona, CA. Box 260, N-027.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Navy - Corona, CA COBRA (open access)

Navy - Corona, CA COBRA

Navy - Corona, CA COBRA. Box 260, N-027.
Date: unknown
Creator: United States. Department of Defense.
Object Type: Text
System: The UNT Digital Library
R&A Working Papers and Staff Presentations (open access)

R&A Working Papers and Staff Presentations

R&A Working Papers and Staff Presentations. Box 260, N-027.
Date: unknown
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
Navy Data Calls - NWAD HAZMAT Materials List (open access)

Navy Data Calls - NWAD HAZMAT Materials List

Navy Data Calls - NWAD HAZMAT Materials List. Box 260, N-027.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Data Call 1 - Naval Shipyard Long Beach, CA (open access)

Data Call 1 - Naval Shipyard Long Beach, CA

Data Call 1 - Naval Shipyard Long Beach, CA. Box 168, L-100.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Naval Weapons Station Seal Beach, California - Data Call (open access)

Naval Weapons Station Seal Beach, California - Data Call

Naval Weapons Station Seal Beach, California - Data Call. General Installation Information. Box 166, L-098.
Date: unknown
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
Fleet Training Center, San Diego, CA - Data Call (open access)

Fleet Training Center, San Diego, CA - Data Call

Fleet Training Center, San Diego, CA - Data Call. Box 192, L-124.
Date: unknown
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Data Calls - Fleet Anti-Submarine Warfare Training Center Pacific San Diego, CA (open access)

Data Calls - Fleet Anti-Submarine Warfare Training Center Pacific San Diego, CA

Data Calls - Fleet Anti-Submarine Warfare Training Center Pacific San Diego, CA. Contains installation data, military value, capacity analysis, and environmental data. (Box 191)
Date: unknown
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library