The Experts below are selected from a list of 7827 Experts worldwide ranked by ideXlab platform
Jacob Ostergaard - One of the best experts on this subject based on the ideXlab platform.
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operation experiences with a 30 kv 100 mva high temperature superconducting cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, Chresten Træholt, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, E Veje, Dag Willen, Jacob OstergaardAbstract:A superconducting cable based on Bi-2223 Tape Technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
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Operation experiences with a 30 kV/100 MVA high temperature superconducting cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, Chresten Træholt, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, E Veje, Dag Willen, Jacob OstergaardAbstract:A superconducting cable based on Bi-2223 Tape Technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
Ole Tonnesen - One of the best experts on this subject based on the ideXlab platform.
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operation experiences with a 30 kv 100 mva high temperature superconducting cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, Chresten Træholt, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, E Veje, Dag Willen, Jacob OstergaardAbstract:A superconducting cable based on Bi-2223 Tape Technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
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Operation experiences with a 30 kV/100 MVA high temperature superconducting cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, Chresten Træholt, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, E Veje, Dag Willen, Jacob OstergaardAbstract:A superconducting cable based on Bi-2223 Tape Technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
Hsing-bung Chen - One of the best experts on this subject based on the ideXlab platform.
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IEEE CLOUD - Cost of Tape versus Disk for Archival Storage
2014 IEEE 7th International Conference on Cloud Computing, 2014Co-Authors: Jeff Inman, Gary Grider, Hsing-bung ChenAbstract:For archiving large datasets in high-performance computing facilities, Tape Technology has a long history of providing inexpensive capacity. However, as the memory-size of supercomputers continues to grow geometrically, the cost of Tape bandwidth is becoming more important. The projected costs for Tape-drives, robotics, and maintenance, are creating challenges for Tape-based archives. The advent of erasure-coded object storage, driven by the "cloud storage" industry, might make it practical to implement archives using disks, or hybrid disk-and-Tape systems. We used linear optimization techniques to investigate when and how this transition might best be made, taking into consideration our significant investment in Tape Technology. Our models introduce a technique to systematically relax constraints on the relationship between Tape-capacity and Tape-bandwidth, which governs a trade-off between cost and performance. We ran parameter studies that support some preliminary conclusions about paths forward for archive infrastructure at LANL.
Erich Thanhardt - One of the best experts on this subject based on the ideXlab platform.
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using data science to understand Tape based archive workloads
Proceedings of the 2015 XSEDE Conference on Scientific Advancements Enabled by Enhanced Cyberinfrastructure, 2015Co-Authors: Bill Anderson, Marc Genty, David L Hart, Erich ThanhardtAbstract:Data storage needs continue to grow in most fields, and the cost per byte for Tape remains lower than the cost for disk, making Tape storage a good candidate for cost-effective long-term storage. However, the workloads suitable for Tape archives differ from those for disk file systems, and archives must handle internally generated workloads that can be more demanding than those generated by end users (e.g., migration of data from an old Tape Technology to a new one). To better understand the variegated workloads, we have followed the first steps in the data science methodology. For anyone considering the use or deployment of a Tape-based data archive or for anyone interested in details of data archives in the context of data science, this paper describes key aspects of data archive workloads.
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XSEDE - Using data science to understand Tape-based archive workloads
Proceedings of the 2015 XSEDE Conference on Scientific Advancements Enabled by Enhanced Cyberinfrastructure - XSEDE '15, 2015Co-Authors: Bill Anderson, Marc Genty, David L Hart, Erich ThanhardtAbstract:Data storage needs continue to grow in most fields, and the cost per byte for Tape remains lower than the cost for disk, making Tape storage a good candidate for cost-effective long-term storage. However, the workloads suitable for Tape archives differ from those for disk file systems, and archives must handle internally generated workloads that can be more demanding than those generated by end users (e.g., migration of data from an old Tape Technology to a new one). To better understand the variegated workloads, we have followed the first steps in the data science methodology. For anyone considering the use or deployment of a Tape-based data archive or for anyone interested in details of data archives in the context of data science, this paper describes key aspects of data archive workloads.
Chresten Træholt - One of the best experts on this subject based on the ideXlab platform.
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operation experiences with a 30 kv 100 mva high temperature superconducting cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, Chresten Træholt, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, E Veje, Dag Willen, Jacob OstergaardAbstract:A superconducting cable based on Bi-2223 Tape Technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
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Operation experiences with a 30 kV/100 MVA high temperature superconducting cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, Chresten Træholt, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, E Veje, Dag Willen, Jacob OstergaardAbstract:A superconducting cable based on Bi-2223 Tape Technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS cable. The cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS cable systems are analysed.
