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Review of state-of-the-art of solar collector corrosion processes. Task 1 of solar collector studies for solar heating and cooling applications. Final technical progress report

Description: The state-of-the-art of solar collector corrosion processes is reviewed, and Task 1 of a current research program on use of aqueous heat transfer fluids for solar heating and cooling is summarized. The review of available published literature has indicated that lack of quantitative information exists relative to collector corrosion at the present time, particularly for the higher temperature applications of solar heating and cooling compared to domestic water heating. Solar collector systems ar… more
Date: April 11, 1980
Creator: Clifford, J E & Diegle, R B
Partner: UNT Libraries Government Documents Department
open access

Multi-temperature gas chromatography using isothermal columns in series. Technical report

Description: A computer-controlled three-oven gas chromatograph having a multi-position stream-switching valve has been used first to divide a wide-boiling mixture of n-alkanes into three cuts and then to fractionate each cut using a packed column at a different temperature. After initial injection of the sample into the highest temperature column, the low boilers were switched to a low temperature oven. Then, the mid-boilers were switched to a column at an intermediate temperature. For routine repetitive a… more
Date: August 11, 1980
Creator: Spencer, W. A. & Rogers, L. B.
Partner: UNT Libraries Government Documents Department
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Study of corrosion in multimetallic systems. Task 2 of solar collector studies for solar heating and cooling applications. Final technical progress report

Description: Corrosion measurements were made on candidate alloys of construction for non-concentrating solar collectors under simulated conditions of collector operation. Materials evaluated were aluminum alloys 1100, 3003, and 6061, copper alloy 122, Type 444 stainless steel, and 1018 plain carbon steel. The solutions used were equivolume mixtures of ethylene glycol and water, and propylene glycol and water. They were used without corrosion inhibitors but with addition of chloride, sulfate, and bicarbonat… more
Date: April 11, 1980
Creator: Diegle, R B
Partner: UNT Libraries Government Documents Department
open access

Systematic efficiency enhancement in Monte Carlo applications. Final progress report, July 1, 1976-January 31, 1980

Description: Research performed under the grant period has been undertaken as part of the principal investigator's long-term efforts to develop new, more efficient estimators for application to a wide variety of practical problems. Two rather different approaches have characterized the work: (1) the use of a multistage analysis (1) to optimize the efficiencies (variances) of families of estimating random variables in a traditional statistical Monte Carlo framework, and (2) the development of parallel quasi-… more
Date: June 11, 1980
Creator: Spanier, J.
Partner: UNT Libraries Government Documents Department
open access

Methodology for assessing the impacts of alternative rate designs on industrial energy use. Draft report

Description: A task was undertaken to develop a method for analyzing industrial user responses to alternative rate designs. The method described considers the fuel switching and conservation responses of industrial users and the impact to a hypothetical utility regarding revenue stability, annual gas demand, and seasonal fluctuations. Twenty-seven hypothetical industrial plant types have been specified. For each combustor in the plant, the fuel consumption by season, initial fuel type, fuel switching costs,… more
Date: January 11, 1980
Partner: UNT Libraries Government Documents Department
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Parameter identification in groundwater flow: a feasibility study

Description: A set of first-order differential state equations is developed from taking finite differences of the partial differential equation that describes groundwater flow during a pump-drawdown test. The number of states in the model is a direct function of the number of discrete spatial segments used in the approximate model. This number of states is studied to determine a reasonably low-order model that preserves the accuracy of resulting simulations when compared with an available analytical solutio… more
Date: March 11, 1980
Creator: Azevedo, S. G.; Doerr, T. A.; Candy, J. V. & Pimentel, K. D.
Partner: UNT Libraries Government Documents Department
open access

MFTF Thomson scattering: a system study

Description: This report documents the design effort for a Thomson scattering diagnostic system for MFTF. The principal problem is obtaining enough photons, in the presence of a poorly known background, to make satisfactory measurements. No currently available laser will yield enough photons to do this. Design concepts for imaging and detection are discussed. The ability of components to survive in the high-radiation environment of MFTF is identified as an important problem. The transition to MFTF-B makes m… more
Date: September 11, 1980
Creator: Frank, A.M.
Partner: UNT Libraries Government Documents Department
open access

Novette chain design and performance

Description: The design and performance of the Novette laser system, which is a two-beam, two-wavelength (1.05 ..mu.. and 0.53 ..mu..) target irradiation facility using phosphate glass laser chains, are discussed with information on the glass properties, controlling factors in the design selection, and projected performance with varying operating conditions. (LCL)
Date: December 11, 1980
Creator: Hunt, J. T. & Speck, D. R.
Partner: UNT Libraries Government Documents Department
open access

Photovoltaic mechanisms in polycrystalline thin film silicon solar cells. Eighth month technical summary report, July 31, 1979-March 31, 1980

Description: The objective of this program is to understand fundamental aspects of grain boundary influences on photocurrent collection and opposing current transport in polycrystalline silicon cells. Results of the program are expected to aid in optimizing thin film polycrystalline silicon solar cells. Three major tasks are addressed in this program, which includes a subcontract to the Pennsylvania State University (Penn State). These are: modeling, measurement technique development, and characterization a… more
Date: July 11, 1980
Creator: Temofonte, T. A.; Szedon, J. R.; Dickey, H. C.; Fonash, S. J.; Ashok, S. & Lester, P. A.
Partner: UNT Libraries Government Documents Department
open access

Comparison of conventional and solar-water-heating products and industries report

Description: President Carter established a goal that would require installation of at least one million solar water heaters by 1985 and 20 million water-heating systems by the year 2000. The goals established require that the solar industry be sufficiently mature to provide cost-effective, reliable designs in the immediate future. The objective of this study was to provide the Department of Energy with quantified data that can be used to assess and redirect, if necessary, the program plans to assure compli… more
Date: July 11, 1980
Creator: Noreen, D; LeChevalier, R; Choi, M & Morehouse, J
Partner: UNT Libraries Government Documents Department
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Determination of Interaction Between Different Waters and Chemical Antifreeze Additives. Task 3 of Solar Collector Studies for Solar Heating and Cooling Applications. Final Technical Progress Report

Description: Chemical degradation of aqueous glycol solutions was monitored during stagnant exposure at temperatures of 100 C and 180 C. Changes in corrosivity of the solutions toward alloys of construction in solar collectors were also determined. The solutions consisted of equivolume mixtures of reagent grade ethylene glycol and water, and propylene glycol and water. The water was either distilled/deionized, or a mildy corrosive solution containing 100 ppM each of chloride, sulfate, and bicarbonate ions. … more
Date: April 11, 1980
Creator: Beavers, J. A.; Salmons, L. A. & Diegle, R. B.
Partner: UNT Libraries Government Documents Department
open access

Corrosion Problems With Aqueous Coolants, Final Report

Description: The results of a one year program to characterize corrosion of solar collector alloys in aqueous heat-transfer media are summarized. The program involved a literature review and a laboratory investigation of corrosion in uninhibited solutions. It consisted of three separate tasks, as follows: review of the state-of-the-art of solar collector corrosion processes; study of corrosion in multimetallic systems; and determination of interaction between different waters and chemical antifreeze additiv… more
Date: April 11, 1980
Creator: Diegle, R. B.; Beavers, J. A. & Clifford, J. E.
Partner: UNT Libraries Government Documents Department
open access

Literature on fabrication of tungsten for application in pyrochemical processing of spent nuclear fuels

Description: The pyrochemical processing of nuclear fuels requires crucibles, stirrers, and transfer tubing that will withstand the temperature and the chemical attack from molten salts and metals used in the process. This report summarizes the literature that pertains to fabrication (joining, chemical vapor deposition, plasma spraying, forming, and spinning) is the main theme. This report also summarizes a sampling of literature on molbdenum and the work previously performed at Argonne National Laboratory … more
Date: October 11, 1980
Creator: Edstrom, C. M.; Phillips, A. G.; Johnson, L. D. & Corle, R. R.
Partner: UNT Libraries Government Documents Department
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Effect of permeability on cooling of a magmatic intrusion in a geothermal reservoir

Description: Numerical modeling of the transient cooling of a magmatic intrusion is described in a geothermal reservoir that results from conduction and convection, considering the effects of overlying cap rock and differing horizontal and vertical permeabilities of the reservoir. These results are compared with data from Salton Sea Geothermal Field (SSGF). Multiple layers of convection cells are observed when horizontal permeability is much larger than vertical permeability. The sharp drop-off of surface h… more
Date: January 11, 1980
Creator: Lau, K. H.
Partner: UNT Libraries Government Documents Department
open access

IPCS user's manual

Description: The Interprocess Communications System (IPCS) was written to provide a virtual machine upon which the Supervisory Control and Diagnostic System (SCDS) for the Mirror Fusion Test Facility (MFTF) could be built. The hardware upon which the IPCS runs consists of nine minicomputers sharing some common memory.
Date: December 11, 1980
Creator: McGoldrick, P.R.
Partner: UNT Libraries Government Documents Department
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