13 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "Lorensen, L. E."  
Results: 1 - 13
open access

Silica control and materials tests at the Salton Sea geothermal field

Description: The Lawrence Livermore Laboratory maintains and operates a test facility near Niland, California, in the Imperial Valley for field studies on SSGF brine chemistry, scale and solids control, materials, and injection. Recent work in silica control and materials testing is reviewed.
Date: June 7, 1979
Creator: Quong, R.; Harrar, J. E.; McCright, R. D.; Locke, R. D.; Lorensen, L. E. & Tardiff, G. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Elimination of defects in plasma polymerized films used in laser fusion targets

Description: This study was conducted to understand and control the parameters governing the formation of defects in plasma polymerized surfaces. An inductively-coupled discharge was used as the source of activated monomer. Four types of well characterized surface irregularities were produced on glass slides which were subsequently fluorocarbon coated. Optimization of the process variables is discussed. (MOW)
Date: April 11, 1979
Creator: Letts, S. A.; Johnson, W. L.; Myers, D. W.; Illige, J. D.; Lorensen, L. E. & Hatcher, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Double-shell inertial confinement fusion target fabrication

Description: First generation hemishells, from which spherical shells are constructed, were fabricated by micromachining coated mandrels and by molding. The remachining of coated mandrels are described in detail. Techniques were developed for coating the microsized mandrels with polymeric and metallic materials by methods including conformal coating, vapor deposition, plasma polymerization and thermoforming. Micropositioning equipment and bonding techniques have also been developed to assemble the hemishell… more
Date: August 26, 1980
Creator: Hatcher, C. W.; Lorensen, L. E. & Weinstein, B. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Methane extraction from geopressured-geothermal brine at wellhead conditions

Description: Disposal of geopressured-geothermal brine effluents by injection is expected to be costly, even into shallow aquifers. If injection into the production reservoir becomes necessary to maintain productivity and to minimize subsidence, the injection pumping costs can become overwhelming. An option aimed at reducing injection pump operating costs is to maintain a higher than normal pressure at the production wellhead to reduce the injection pumping load. The crucial element, however, is that a sign… more
Date: May 29, 1980
Creator: Quong, R.; Owen, L. B.; Locke, F. E.; Otto, C. H.; Netherton, R. & Lorensen, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine III. Scaling measurements and tests of other methods of brine modification

Description: The Lawrence Livermore Laboratory Brine Treatment Test System at Niland, Imperial Valley, California, has been used to evaluate a promising organic compound to the abatement of siliceous scale in brine handling equipment. Three-day scaling tests of Ethoquad 18/25 (Armak) alone (at a concentration of 25 ppM), and Ethoquad in combination with Dequest 2060 (Monsanto) showed a scaling rate reduction of 40 to 80% at 90/sup 0/C, 15 to 40% at 125/sup 0/C, and no reduction of 210/sup 0/C. Changes in th… more
Date: August 1, 1979
Creator: Harrar, J. E.; Locke, F. E.; Otto, C. H., Jr.; Lorensen, L. E.; Frey, W. P. & Snell, E. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine IV. Final tests of candidate additives

Description: The Lawrence Livermore Laboratory Brine Treatment Test System at Niland, Imperial Valley, California, has been used to evaluate a number of cationic polymers and surfactants as scale control agents. An initial group of compounds was narrowed to four on the basis of their activity as silica precipitation inhibitors. Three of these and certain combinations of compounds were then given a 40-h test to determine their effectiveness in retarding scales formed at 220, 125, and 90/sup 0/C. The best sin… more
Date: February 1, 1980
Creator: Harrar, J. E.; Locke, F. E.; Otto, C. H., Jr.; Lorensen, L. E.; Frey, W. P. & Snell, E. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary results of tests of proprietary chemical additives, seeding, and other approaches for the reduction of scale in hypersaline geothermal systems

Description: The LLL field brine-scaling test system and a variety of measurement techniques have been used to test a group of eight proprietary additives from eight different companies, a hydroxyethylcellulose previously found to retard silica precipitation, and geothermal sludge as a seeding agent to reduce scaling. For each additive, scaling rates at both 210 and 125/sup 0/C and on three different materials--mild steel, Teflon, and Hastelloy C-276--were measured using test coupons. Sections of steel pipe… more
Date: February 1, 1979
Creator: Harrar, J. E.; Locke, F. E.; Otto, C. H., Jr.; Deutscher, S. B.; Lim, R.; Frey, W. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tests of proprietary chemical additives as antiscalants for hypersaline geothermal brine. Final report

Description: The Lawrence Livermore Laboratory brine treatment test system has been used to carry out a short-term evaluation of a number of proprietary chemical additives as antiscalants for the hypersaline brine of the Salton Sea Geothermal Field. In addition, a test of sludge seeding was conducted as a technique for scale control. The effect of each additive on the rate of precipitation of silica from the effluent brine at 90/sup 0/C was measured, and scaling rates of brine treated with nine of the addit… more
Date: January 1, 1980
Creator: Harrar, J. E.; Locke, F. E.; Otto, C. H., Jr.; Deutscher, S. B.; Frey, W. P.; Lorensen, L. E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of organic additives on the formation of solids from hypersaline geothermal brine

Description: Studies are underway to identify compounds that will, at cost-effective concentrations, inhibit scale and solids formation when added to the brine at the high-temperature (approximately 200{sup 0}C) front end of the plant. The study reported here constitutes a preliminary, bench-test screening of 49 substances, the most promising of which will be examined later in on-line pilot plant studies. A variety of substances were tested, including both simple and polymeric alcohols, ethers, aldehydes, c… more
Date: March 1, 1978
Creator: Harrar, J. E.; Lorensen, L. E.; Otto, C. H., Jr.; Deutscher, S. B. & Tardiff, G. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine

Description: A number of compounds have been screened as potential scale control agents by examining their effect on the precipitation of silica from Magmamax No. 1 brine. The substances were tested using the Lawrence Livermore Laboratory scale-control test system at the Niland, California, test site. Solutions of the test substances were injected into flowing brine at approx. 200/sup 0/C, the brine was flashed at 125/sup 0/C, and then the kinetics of solids and silica precipitation from effluent brine held… more
Date: April 3, 1979
Creator: Harrar, J. E.; Locke, F. E.; Lorensen, L. E.; Otto, C. H., Jr.; Deutscher, S. B.; Frey, W. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine II. Tests of nitrogen-containing compounds, silanes, and additional ethoxylated compounds

Description: Several new classes of organic compounds have been screened as potential geothermal scale control agents by examining their effect on the precipitation of silica from Magmamax No. 1 brine. The substances were tested using the Lawrence Livermore Laboratory Brine Treatment Test System at the Niland, California, Test Site. Solutions of the test substances were injected into flowing brine at 210{sup 0}C, the brine was flashed to 125{sup 0}C, and then the kinetics of solids and silica precipitation … more
Date: June 1, 1979
Creator: Harrar, J. E.; Locke, F. E.; Otto, C. H., Jr.; Lorensen, L. E. & Frey, W. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen