New Superconductor Architecture for Fast Quench Detection in Superconducting Devices for Advanced Naval Power Systems
Abstract
The objective of the proposed research is a new fast quench detection method for superconducting devices in naval power systems utilizing the architecture of RE-Ba-Cu-O (REBCO, RE=rare-earth) tape itself. Quench refers to the transition of superconductors from a superconducting state to a resistive normal state. At the remarkably high current densities (>100 times that of copper), REBCO tapesare susceptible to localized heating at defective spots that are invariably present. Since the normal zone propagation velocity in REBCO is extremely small, the hot spots cannot be detected in time to prevent thermal runaway, leading to a catastrophic failure. While several methods are being developed for quench detection, they suffer from drawbacks such as susceptibility to vibrations, low signal-to-noise ratio, extrinsic sensors co-wound with the tape that increase the complexity of coil fabrication or reduce the overall current density. So, there is an imminent need for a method for rapid quench detection without these drawbacks.Our novel solution is to utilize the REBCO tape architecture itself as the main component for quench detection. Our method will be able to meet the requirements for a quench detection system namely, fast response time and strong signal intensity without the drawbacks of other methods. Also, the proposed research will lead to new knowledge including the REBCO tape configuration that provides optimum quench detection response, and how the responses changes with a) location and size of the quench-affected area, b) external noise, c) tape length, d) coil geometry, e) coil insulation, f) coolant type, and g) operating temperature.The proposed research directly addresses recommendations of the Naval Power and Energy Systems (NPES) Technology Development Roadmap (TDR) to develop superconductors to "enhance the efficiency for sustained warfighter operations and platform level energy storage and efficiency for propulsion advanced mission systems". Specifically, our project focuses on achieving superconducting state protection through superconducting tape processingand modification that are both specified in the NPES-TDR. The outcome will be transitioned to the ongoing superconductor projects at NSWC and NRL.*Approved for Public Release
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2021
- Source ID
- N000142112429
Entities
People
- Venkat Selvamanickam
Organizations
- Office of Naval Research
- United States Navy
- University of Houston System