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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
[Letter from Cassandra Broadus to Rhonda Sherrill, April 11, 1991]
Photocopy of a letter from Cassandra Broadus to Rhonda Sherrill, teacher at Sam Houston Elementary School. Broadus congratulates Sherrill on her students presentation, "Living Paintings." Broadus requests video, photos or other documentation of that evening for North Texas Institute for Educators on the Visual Arts newsletters and brochures. Broadus ends the letter saying she hopes to see Sherrill at the 1991 Summer Institute.
Date:
April 11, 1991
Creator:
Broadus, Cassandra
Object Type:
Letter
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
[News Clip: Hoopla]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 11, 1994, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Van Cliburn]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
April 11, 1994, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Ball park]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10pm.
Date:
April 11, 1994, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
DIRECTIONS FOR THE FABRICATION OF A PROBE FOR THE MEASUREMENT OF PLATE SPACING IN PLATE-TYPE FUEL ELEMENTS
A probe for measurement of the space between fuel plates in high-burnup MTR-type fuel elements by eddycurrent techniques is described/su The sensing section is supported near the end of a flattened stainless steel tube into which a rectangular hole was cut to receive it/su The sensing section consists essentially of two slightly bowed springs, the midsections of which protrude slightly above the upper and lower surfaces of the flattened tube. Each spring- carries a section of a ball bearing as the contact point/su It is these two slightly bowed springs that serve as expanding calipers sensing variations in the spacing between adjacent plates. Essentially the rest of the probe is a long handle to permit probing and a conduit for the electrical leads. A two-wire shielded cable is firmly attached to the unflattened end of the probe and then attached to a modified Wheatstone bridge, from which the output is fed into a chart recorder. (M.C.G.)
Date:
April 11, 1962
Creator:
Dismuke, S.E.
Object Type:
Report
System:
The UNT Digital Library
The Mangum Star. (Mangum, Okla. Terr.), Vol. 19, No. 41, Ed. 1 Thursday, April 11, 1907
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
April 11, 1907
Creator:
Echols, R. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 13, No. 40, Ed. 1 Thursday, April 11, 1901
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
April 11, 1901
Creator:
Echols, R. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oklahoma State Register (Guthrie, Okla.), Vol. 27, No. 48, Ed. 1 Thursday, April 11, 1918
Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1918
Creator:
Golobie, John
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Leader (Guthrie, Okla.), Vol. 28, No. 17, Ed. 1 Thursday, April 11, 1918
Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1918
Creator:
Niblack, Leslie G.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star (Mangum, Okla.), Vol. 30, No. 43, Ed. 1 Thursday, April 11, 1918
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1918
Creator:
Jessee, Elmer V.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 6, No. 2, Ed. 1 Thursday, April 11, 1912
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1912
Creator:
Williams, R. T.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1455, Ed. 1 Wednesday, April 11, 1894
Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 11, 1894
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News (Altus, Okla.), Vol. 19, No. 7, Ed. 1 Thursday, April 11, 1918
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
April 11, 1918
Creator:
Orr, J. P.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 28, No. 6, Ed. 1 Thursday, April 11, 1918
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1918
Creator:
Denny, J. Q.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cushing Independent. (Cushing, Okla.), Vol. 6, No. 18, Ed. 1 Thursday, April 11, 1907
Weekly newspaper from Cushing, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 11, 1907
Creator:
Holland, Al. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 22, No. 5, Ed. 1 Thursday, April 11, 1912
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1912
Creator:
Zimmerman, Warren
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 8, No. 29, Ed. 1 Friday, April 11, 1913
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1913
Creator:
Barrow, A. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla. Terr.), Vol. 17, No. 4, Ed. 1 Thursday, April 11, 1907
Weekly newspaper from Guymon, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 11, 1907
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Sentinel Leader. (Sentinel, Okla.), Vol. 9, No. 37, Ed. 1 Friday, April 11, 1913
Weekly newspaper from Sentinel, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1913
Creator:
Inglish, G. L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Hollis Tribune. (Hollis, Okla.), Vol. 3, No. 33, Ed. 1 Friday, April 11, 1913
Weekly newspaper from Hollis, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 1913
Creator:
DeVilliers, H. L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Hobart Republican. (Hobart, Okla.), Vol. 7, No. 7, Ed. 1 Thursday, April 11, 1907
Weekly newspaper from Hobart, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
April 11, 1907
Creator:
Benedict, Roy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History