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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
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 are reviewed from the corrosion/service life viewpoint, with emphasis on various applications, collector design, heat transfer fluids, and freeze protection methods. Available information (mostly qualitative) on collector corrosion technology is reviewed to indicate potential corrosion problem areas and corrosion prevention practices. Sources of limited quantitative data that are reviewed are current solar applications, research programs on collector corrosion, and pertinent experience in related applications of automotive cooling and non-solar heating and cooling. A data bank was developed to catalog corrosion information. Appendix A of this report is a bibliography of the data bank, with abstracts reproduced from presently available literature accessions (about 220). This report is presented as a descriptive summary of information that is contained in the data bank.
Date:
April 11, 1980
Creator:
Clifford, J E & Diegle, R B
Object Type:
Report
System:
The UNT Digital Library
Multi-temperature gas chromatography using isothermal columns in series. Technical report
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 analyses, the multi-oven approach offers an attractive alternative.
Date:
August 11, 1980
Creator:
Spencer, W. A. & Rogers, L. B.
Object Type:
Report
System:
The UNT Digital Library
Heating by the Raman instability
Computer simulations are presented of the reflection and heating due to stimulated Raman backscatter of intense laser light in large regions of underdense plasma. The heated electron distribution is found to be approximately a Maxwellian of temperature (m/sub e//2)v/sub p//sup 2/, where v/sub p/ is the phase velocity of the electron plasma wave. A simple model of the reflection is presented. Raman may cause a pre-heat problem with large laser fusion reactor targets.
Date:
April 11, 1980
Creator:
Estabrook, K.G. & Kruer, W.L.
Object Type:
Article
System:
The UNT Digital Library
Study of corrosion in multimetallic systems. Task 2 of solar collector studies for solar heating and cooling applications. Final technical progress report
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 bicarbonate ions. The influences of dissolved oxygen, solution flow velocity, and heat transfer were evaluated. Corrosion morphologies investigated were general attack, pitting, crevice corrosion, and galvanic corrosion. Experimental results indicated that aluminum alloys can experience severe pitting and crevice corrosion at chloride concentrations approaching 50 ppM. The corrosion rate of copper exceeded about 100 ..mu..m/yr in ethylene glycol solutions and about 80 ..mu..m/yr in propylene glycol solutions. Crevice corrosion was not observed for copper, but severe galvanic corrosion occurred when it was coupled to T444 stainless steel. T444 steel corroded at rates of less than 1 ..mu..m/yr under all exposure conditions. During circulation at 100 C in the presence of air, ethylene glycol solutions acidified because of degradation of the glycol. The initial pH of propylene glycol solutions was already low, …
Date:
April 11, 1980
Creator:
Diegle, R B
Object Type:
Report
System:
The UNT Digital Library
Mechanical model for ductility loss
A mechanical model was constructed to probe into the mechanism of ductility loss. Fracture criterion based on critical localized deformation was undertaken. Two microstructure variables were considered in the model. Namely, the strength ratio of grain boundary affected area to the matrix, ..cap omega.., and the linear fraction, x, of grain boundary affected area. A parametrical study was carried out. The study shows that the ductility is very sensitive to those microstructure parameters. The functional dependence of ductility to temperature as well as strain-rate, suggested by the model, is demonstrated to be consistent with the observation.
Date:
February 11, 1980
Creator:
Hu, W.L.
Object Type:
Article
System:
The UNT Digital Library
[North side of Administration Building at North Texas State University #1]
Photograph of the exterior of the Hurley Administration Building at North Texas State University. The photograph, apparently taken from the roof of another building, depicts the Administration Building's north side and main entrance. In the left foreground is the Information Sciences Building; the Biology Building is visible in the right foreground. In the left background behind the Administration Building is the Kerr Hall dormitory complex; the A. M. Willis Library is visible in the right background. People are visible on the concrete walking path leading to the Administration Building.
Date:
March 11, 1980
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[North side of Administration Building at North Texas State University #2]
Photograph of the exterior of the Hurley Administration Building at North Texas State University. This photograph, apparently taken from the roof of another building, depicts the Administration Building's north side and main entrance. In the left foreground is the Information Sciences Building; the Biology Building and Chemistry Building are visible in the right foreground. In the left background behind the Administration Building is the Kerr Hall dormitory complex; the A. M. Willis Library is visible in the right background. People are visible on the concrete walking paths leading through the campus.
Date:
March 11, 1980
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[North side of Administration Building at North Texas State University #3]
Photograph of the exterior of the Hurley Administration Building at North Texas State University. This photograph, apparently taken from the roof of another building, depicts the Administration Building's north side and main entrance. In the left foreground is the Information Sciences Building; the Biology Building and Chemistry Building are visible in the right foreground. In the left background behind the Administration Building is the Kerr Hall dormitory complex; the A. M. Willis Library is visible in the right background. People are visible on the concrete walking paths leading through the campus.
Date:
March 11, 1980
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Photograph 2012.201.B0052.0486]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Pilot Killed A Broken Arrow man was found dead Friday in his Auto-Gyro that crashed Thursday afternoon in the Arkansas River in south Tulsa. The pilot was identified as Kunihiko Horriuchi, 33, He was reported missing from a south Tulsa airfield with 15 minutes of fuel at 2 P.M. Thursday. Officials said the craft apparently hit power lines."
Date:
October 11, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0134.0129]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "When the sun goes down at Ski island in northwest Oklahoma City, the lights come on."
Date:
December 11, 1980
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0620]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0156.0221]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 11, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0017]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Tom Coker, candidate House-44"
Date:
November 11, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0616]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Ed Clark, presidential candidate of the Libertarian Party, calls for repeal of laws prohibiting the sale or use of controlled dugs."
Date:
September 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0149.0550]
Photograph used for a story in the Oklahoma Times newspaper.
Date:
January 11, 1980
Creator:
Southerland, Paul B.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0418]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Birds instinctively obey a principle that American City dwellers have yet to learn " "They don't foul their nests, and they don't allow them to be spoiled," Jeffrey Cook, a world-renowned architect, said Thursday in Oklahoma City."
Date:
October 11, 1980
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0600]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Texas halfback Darryl comes up short on a third-and-goal play from the one, but the Longhorns scored on the next play to wrap up Saturday's 20-13 victory over Oklahoma."
Date:
October 11, 1980
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0105]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0134.0128]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "A jury-rigged Christmas tree of lights is reflected in the lake."
Date:
December 11, 1980
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0085]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Jay Dee Collins, left, is congratulated by Police Chief Rae Neal."
Date:
July 11, 1980
Creator:
White, Perry
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0642]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
February 11, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0618]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0643]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 11, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0617]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 11, 1980
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History