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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

Description: 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.
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Mineral Industries Survey of the United States, California: Tuolumne and Mariposa Counties, Mother Lode District (South). Mines of the Southern Mother Lode Region, Part 2 -- Tuolumne and Mariposa Counties

Description: Report issued by the Bureau of Mines over mining operations in the southern Mother Lode Region of California. A review of this area is presented, and discussed. This report includes tables, illustrations, and photographs.
Date: 1940
Creator: Julihn, C. E. & Horton, F. W.
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Clay in Petroleum-Reservoir Rocks: Its effect on Permeability, with Particular Reference to Tejon-Grapevine Area, Kern County, California

Description: Report issued by the Bureau of Mines over studies conducted on clays of petroleum-reservoir rocks in Kern County, California. The effects of water sensitivity of clays are presented. This report includes tables, maps, illustrations, and photographs.
Date: 1959
Creator: Morris, Frank C.; Aune, Quinton A. & Gates, George Laurence
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Evaluation of a California Bentonitic Clay for Use in Oil-Well Drilling Muds

Description: Report issued by the Bureau of Mines over studies conducted on the bentonite deposits of San Benito County, California. As stated in the introduction, "the purpose of the study was to learn if these large deposits contain bentonite of sufficient quality and quantity to be of economic value as an oil-well drilling mud additive" (p. 1). This report includes tables, maps, illustrations, and photographs.
Date: 1959
Creator: Aune, Quinton A.; Caraway, W. Hodge; Morris, Frank C. & Gates, George Laurence
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Investigation of the Black Wonder Manganese Deposits, Santa Clara and Stanislaus Counties, California

Description: Report issued by the Bureau of Mines over manganese deposits of Santa Clara and Stanislaus Counties. As stated in the introduction, "the geology is outlined, ore deposits are described and work performed by the Bureau of Mines is covered in detail and supplemented by assay maps and figures" (p. 1). This report includes tables, maps, and illustrations.
Date: September 1956
Creator: Volin, M. E.; Matson, E. J. & Trengove, R. R.
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Reverse Osmosis for Water Desalination

Description: Report issued by the Office of Saline Water over studies conducted on the reverse-osmosis program. The methods of desalination through osmosis are discussed. This report includes tables, illustrations, and photographs.
Date: May 22, 1964
Creator: Lonsdale, H. K.; Merten, U.; Riley, R. L.; Vos, K. D. & Westmoreland, J. C.
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Plastic Magnesia

Description: Report issued by the Bureau of Mines over the production methods and uses of plastic magnesia. Methods, properties, and uses of plastic magnesia are discussed. This report includes tables, illustrations, and photographs.
Date: 1925
Creator: Ralston, Oliver C.; Pike, Robert D. & Duschak, Lionel H.
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Evaluation and verification of epitaxial process sequence for silicon solar-cell production. Final program summary report

Description: 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.
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