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Practical Superconductor Development for Electrical Power Applications Semiannual Report: October 1989-June 1990

Description: Progress report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes technical progress of research and development efforts aimed at producing superconducting components based on the Y-Ba-Cu, Bi-Sr-Ca-Cu, and Tl-Ba-Ca-Cu oxide systems.
Date: June 1990
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1990

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes technical progress of research and development efforts aimed at producing superconducting components based on the Y-Ba--Cu, Bi-Sr-Ca-Cu, Bi-Pb-Sr-Ca-Cu, and TI-Ba-Ca-Cu oxide systems including: synthesis and heat treatment of high-Ta superconductors, formation of monolithic and composite wires and tapes, superconductor/metal connectors, characterization of structures and superconducting and mechanical properties, and fabrication and properties of thin films.
Date: October 1990
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1991

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes technical progress of research and development efforts aimed at producing superconducting components based on the Y-Ba-Cu, BI-Sr-Ca-Cu, Bi-Pb-Sr-Ca-Cu, and TI-Ba-Ca-Cu oxide systems including: synthesis and heat treatment of high-Te superconductors, formation of monolithic and composite wires and tapes, superconductor/metal connectors, characterization of structures and superconducting and mechanical properties, and fabrication and properties of thin films.
Date: October 1991
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1988

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report documents research efforts aimed at producing superconducting components based on oxide systems.
Date: February 1989
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1994

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes technical progress of research and development efforts aimed at producing superconducting components in the Y-Ba-Cu, (Bi,Pb)-Sr-Ca-Cu, (Tl,Pb,Bi)-(Ba,Sr)-Ca-Cu, and Hg-Ba-Ca-Cu-O oxide systems including: synthesis and heat treatment of high-Ta superconductors, formation of monolithic and composite conductors, characterization of structures and superconducting and mechanical properties, and fabrication and testing of prototype components.
Date: October 1994
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1995

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes the technical progress of research and development efforts aimed at producing superconducting components in the (Bi,Pb)-Sr-Ca-Cu, (T,Pb,Bi,V)- (Ba,Sr)-Ca-Cu, and Y-Ba-Cu oxide systems including: synthesis and heat treatment of high-Te superconductors, formation of monolithic and composite conductors, characterization of structures and superconducting and mechanical properties, and fabrication and testing of prototype components.
Date: October 1995
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1993

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes technical progress of research and development efforts aimed at producing superconducting components in the Y-Ba-Cu, (B1,Pb)-Sr-Ca-Cu, (Tl,Pb,BI)-(Ba,Sr)-Ca-Cu, and Hg-Ba-Ca-Cu-O oxide systems including: synthesis and heat treatment of high-Ta superconductors; formation of monolithic and composite wires, tapes, and coils; characterization of structures and superconducting and mechanical properties; fabrication and properties of films; and development of prototype components.
Date: October 1993
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

Practical Superconductor Development for Electrical Power Applications, Annual Report: 1992

Description: Annual report for the superconductor program at Argonne National Laboratory discussing the group's activities and research. This report describes the technical progress of research and development efforts aimed at producing superconducting components that are based on the Y-Ba-Cu, Bi-Sr-Ca-Cu, Bi-Pb-Sr-Ca-Cu, and (Tl,Pb)-(Ba,Sr)-Ca-Cu oxide systems including: synthesis and heat treatment of high-Ta superconductors, formation of monolithic and composite wires and tapes, superconductor/metal connectors, characterization of structures and superconducting and mechanical properties, fabrication and properties of thin films, and development of prototype components.
Date: October 1992
Creator: Argonne National Laboratory. Materials and Components Technology Division.
Partner: UNT Libraries Government Documents Department

High-Temperature Superconductivity in Perspective

Description: This is the second of two OTA assessments on the subject of high-temperature superconductivity (HTS). As the title suggests, this study attempts to put HTS in perspective, both in terms of competing technologies (e.g., the more mature low-temperature superconductors), and in terms of the many technical and economic problems that must be overcome before HTS can be widely used.
Date: April 1990
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department

Commercializing high-temperature superconductivity

Description: Since the discovery of high-temperature superconductivity (HTS), research laboratories around the world have pushed the temperature limits steadily upward, opening the way to commercial applications with potentially revolutionary impacts. The scientific race is becoming a commercial race, one featuring U.S. and Japanese companies, and one that the United States could lose. Indeed, American firms may already be falling behind in commercializing the technology of superconductivity.
Date: June 1988
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department

Results of Compact Stellarator Engineering Trade Studies

Description: number of technical requirements and performance criteria can drive stellarator costs, e.g., tight tolerances, accurate coil positioning, low aspect ratio (compactness), choice of assembly strategy, metrology, and complexity of the stellarator coil geometry. With the completion of a seven-year design and construction effort of the National Compact Stellarator Experiment (NCSX) it is useful to interject the NCSX experience along with the collective experiences of the NCSX stellarator community to improving the stellarator configuration. Can improvements in maintenance be achieved by altering the stellarator magnet configuration with changes in the coil shape or with the combination of trim coils? Can a mechanical configuration be identified that incorporates a partial set of shaped fixed stellarator coils along with some removable coil set to enhance the overall machine maintenance? Are there other approaches that will simplify the concepts, improve access for maintenance, reduce overall cost and improve the reliability of a stellarator based power plant? Using ARIES-CS and NCSX as reference cases, alternative approaches have been studied and developed to show how these modifications would favorably impact the stellarator power plant and experimental projects. The current status of the alternate stellarator configurations being developed will be described and a comparison made to the recently designed and partially built NCSX device and the ARIES-CS reactor design study.
Date: May 27, 2009
Creator: Brown, Tom; Bromberg, L. & Cole, M.
Partner: UNT Libraries Government Documents Department

Field Demonstration of a 24-kV Superconducting Cable at Detroit Edison

Description: Customer acceptance of high temperature superconducting (HTS) cable technology requires a substantial field demonstration illustrating both the system's technical capabilities and its suitability for installation and operation within the utility environment. In this project, the world's first underground installation of an HTS cable using existing ductwork, a 120 meter demonstration cable circuit was designed and installed between the 24 kV bus distribution bus and a 120 kV-24 kV transformer at Detroit Edison's Frisbie substation. The system incorporated cables, accessories, a refrigeration system, and control instrumentation. Although the system was never put in operation because of problems with leaks in the cryostat, the project significantly advanced the state-of-the-art in the design and implementation of Warm Dielectric cable systems in substation applications. Lessons learned in this project are already being incorporated in several ongoing demonstration projects.
Date: December 1, 2004
Creator: Kelley, Nathan & Corsaro, Pietro
Partner: UNT Libraries Government Documents Department

New Processing and Characterization Approaches for Achieving Full Performance of High Temperature Superconducting Tapes of (Bi,Pb)2Sr2Ca2Cu3Ox

Description: The thrust of this research was to identify and understand current limiting mechanisms (CLMs) that limit the current carrying capacity of (Bi,Pb)2Sr2Ca2Cu3Ox (2223) in Ag-sheathed wire. Our program concentrated on developing new methods to identify CLMs at the micrometer scale and new processing techniques to eliminate CLMs. All of the DOE Superconductivity Partnership Initiative (SPI) programs are using 2223 wire, so increasing the critical current density (Jc) in the wire can improve the technical performance of the demonstration projects, and at the same time it can decrease the cost of the wire. The important cost metric for superconducting wire is $/kAm, so increasing Jc, which is in the denominator, decreases the wire cost. The obvious CLMs were micrometer size obstacles in the 2223 ceramic that block current flow, including: misaligned grains, cracks, pores, and nonsuperconducting phases. Pores and cracks - regions where there is no superconductor or the grains are not physically connected to one another ? cannot carry supercurrent, so they were the first CLMs we tried to eliminate with improved processing. Prior to the contract, we had started investigating overpressure (OP) processing with Williams at ORNL to heal cracks and remove pores. OP processing, which is a variant of hot isostatic pressing (HIP), uses an Ar/O2 gas mixture to apply a high pressure (up to 200 atm) to compress the sample and to set the oxygen partial pressure (pO2) to form 2223. Williams had a static pressure system we used to demonstrate that OP processing healed cracks and densified the wire, but the static system limited the processing parameters we could investigate. We proposed building a new gas-flow OP system to expand the experimental capabilities and to investigate new processing routes using the gas-flow OP system. Using the gas-flow OP system, we established new world records in 2003 ...
Date: March 22, 2006
Creator: Hellstrom, E.E. & Larbalestier, D.C.
Partner: UNT Libraries Government Documents Department

Cryogenic System for a High Temperature Superconducting Power Transmission Cable

Description: High-temperature superconducting (HTS) cable systems for power transmission are under development that will use pressurized liquid nitrogen to provide cooling of the cable and termination hardware. Southwire Company and Oak Ridge National Laboratory have been operating a prototype HTS cable system that contains many of the typical components needed for a commercial power transmission application. It is being used to conduct research in the development of components and systems for eventual commercial deployment. The cryogenic system was built by Air Products and Chemicals, Allentown, Pennsylvania, and can circulate up to 0.35 kg/s of liquid nitrogen at temperatures as low as 67 K at pressures of 1 to 10 bars. Sufficient cooling is provided for testing a 5-m-long HTS transmission cable system that includes the terminations required for room temperature electrical connections. Testing of the 5-m HTS transmission cable has been conducted at the design ac conditions of 1250 A and 7.5 kV line to ground. This paper contains a description of the essential features of the HTS cable cryogenic system and performance results obtained during operation of the system. The salient features of the operation that are important in large commercial HTS cable applications will be discussed.
Date: July 12, 1999
Creator: Demko, J.A.; Gouge, M.J.; Hughey, R.L.; Lue, J.W.; Martin, R.; Sinha, U. et al.
Partner: UNT Libraries Government Documents Department