Speaker
Dr
Jacob Kephart
(Navy)
Description
Most modern-day high temperature superconducting (HTS) power systems are designed to immerse the entire cable in subcooled nitrogen, taking advantage of favorable thermal and electrical properties. This project investigates the use of nitrogen in two phases, gas and liquid. The latent heat of vaporization of nitrogen provides a means of absorbing heat leaked into the cryostat or generated in a power cable with without an associated temperature rise in the cryogen. Using this phase change approach cryostats of long length can be held at nearly constant temperatures using only fraction of the cryogen compared to a conventional sub-cooled liquid cryogen approach. This paper provides an overview of the demonstrator and its key design points, while discussing improvements planned for ongoing efforts.
Author
Dr
Jacob Kephart
(Navy)
Co-authors
Jason Miller
(Navy)
Dr
Kevin Woods
(Navy)
