Characterization of Gaseous Helium Flow Cryogen in a Flexible Cryostat for Naval Applications of High Temperature Superconductors

Fitzpatrick, Brian; Kephartl, J.T.; Golda, E. Michael

doi:10.1109/tasc.2007.897763

Cited by 61 publications

(11 citation statements)

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“…However, the application of this cryogen is mainly limited to terrestrial or ground-based applications of ReBCO superconductors, due to the fact that its minimum operating temperature is 64 K under subcooled situation, below which temperature, it freezes. In order to achieve higher current carrying capacity and higher power density in superconducting equipment, much lower operating temperatures are required compared to 77 K LN2 temperature 37 . Gaseous helium (GHe) has the ability to work at lower cryogenic temperatures with a lower risk of suffocation compared with LN2.…”

Section: Iiib Liquid and Gaseous Insulationmentioning

confidence: 99%

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Yazdani-Asrami

Seyyedbarzegar

Zhang

et al. 2022

IEEE Electr. Insul. Mag.

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Superconducting technology for aerospace application is enabled by emerging development around hydrogen cooled electrically powered aircraft, aiming at zero-emission aviation. Superconductors, typically in the form of tape or wire in a composite architecture, can not only carry current density which is over 100 times that of copper and aluminium, but are also characterized by much lower losses. This property of superconductors makes them good candidates for the fabrication of superconducting devices of high specific power density, i.e. lower size and lighter weight, which is critical for aerospace applications. Superconductors, like any other conductors, require standard insulation to function safely and reliably in the electrical apparatus of aircraft, especially due to the special architecture, operating temperature, and operating condition of superconducting apparatus at high altitude. Extra attention should be drawn to choose proper insulating materials for such applications. In this paper, the challenges and considerations for choosing insulating materials for superconducting devices in cryo-electrified aircraft are reviewed and discussed.

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Section: Iiib Liquid and Gaseous Insulationmentioning

confidence: 99%

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Yazdani-Asrami

Seyyedbarzegar

Zhang

et al. 2022

IEEE Electr. Insul. Mag.

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“…One major reason to use helium gas is to avoid a phase change in the coolant allowing a much larger temperature gradient across the length of the cable [5]. Therefore, there is no phase change as the helium travels down the cryostat.…”

Section: A Hts Cable Cryogenic Cooling Systemmentioning

confidence: 99%

Naval Ship-to-Shore High Temperature Superconducting Power Transmission Cable Feasibility

Ferrara¹,

Uva²,

Nowlin³

2011

IEEE Trans. Appl. Supercond.

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The process to establish shore power connectivity for a naval ship requires the use of numerous copper cables extending from power substations on the pier to receptacles on board the ship. The copper cables are very heavy, cumbersome, and hard to handle. The weight of the cables requires a coordinated effort between a crew on the pier, and a crew on the ship. In many instances, handling these cables requires the use of a crane or a boom truck to extend them from the pier-side power substations up to the ship's connection point.A feasibility study has been conducted to investigate the use of high temperature superconducting (HTS) cables to transmit power from land based power substations to naval ships. Since a single HTS cable can replace an array of copper cables, the time required to connect a ship to shore power would be decreased therefore reducing the amount of time the ship must run its generators. The reduction in weight will also enhance safety for the personnel handling the cables.Index Terms-Helium cryogen, high temperature superconductor, power cables, shore power.

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“…Results of this testing showed that it was possible to cool a long length of cryostat, but helium charge pressure and flow rate would have a great impact on the temperature distribution along the cable [3].…”

Section: B Fiscal Year 2005 Cryogenic Loopmentioning

confidence: 99%

High Temperature Superconducting Degaussing From Feasibility Study to Fleet Adoption

Kephart

Fitzpatrick

Ferrara

et al. 2011

IEEE Trans. Appl. Supercond.

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The need for increased magnetic signature control on Navy ships has lead to the development and adoption of a three axis advanced degaussing system. While this system is effective in reducing the ship magnetic signature, it requires significantly more copper cable than the legacy two axis systems. Degaussing only requires DC currents for field manipulation. Since DC applications is where HTS use excels, a feasibility study was conducted in FY04 to determine the benefits of HTS when used in an advanced degaussing system. Results showed reduced system size and weight, while remaining cost neutral. A series of lab based demonstrations were conducted proving out key aspects of an HTS DG system, most notably cooling a long length of flexible cryostat with gaseous helium. This led to an at sea demonstration of a single HTS DG loop aboard the USS Higgins. This was the first HTS system installed on an active combatant, and it made a successful magnetic range run in April 2009 demonstrating its capability to perform in a naval environment. This paper details the development of the HTS DG system from the initial feasibility study through the successful demonstration onboard the USS HIGGINS.

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Characterization of Gaseous Helium Flow Cryogen in a Flexible Cryostat for Naval Applications of High Temperature Superconductors

Cited by 61 publications

References 1 publication

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Naval Ship-to-Shore High Temperature Superconducting Power Transmission Cable Feasibility

High Temperature Superconducting Degaussing From Feasibility Study to Fleet Adoption

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