Funded by Installation and Testing of Helium Gas Cooled Superconducting DC Cable at FSU-CAPS Sastry Pamidi, Chul Han Kim, Lukas Graber, Danny Crook, Steve Ranner, Bianca Trociewitz, and Steinar Dale The Florida State University - Center for Advanced Power Systems Tallahassee, Florida David Knoll, Dag Willen, Carsten Thidemann, and Heidi Lentge Ultera 19-Pamidi 11 th EPRI Superconductivity Conference, October 28-30, 2013, Houston, TX
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Funded by
Installation and Testing of Helium Gas Cooled
Superconducting DC Cable at FSU-CAPS
Sastry Pamidi, Chul Han Kim, Lukas Graber, Danny Crook, Steve Ranner,
Bianca Trociewitz, and Steinar Dale The Florida State University - Center for Advanced Power Systems
Tallahassee, Florida
David Knoll, Dag Willen, Carsten Thidemann, and Heidi Lentge Ultera
19-Pamidi
11th EPRI Superconductivity Conference, October 28-30, 2013,
Houston, TX
Team Members
Sastry Pamidi
Chul Kim
Steinar Dale
Superconductivity Cryogenics
Danny Crook
Sastry Pamidi
Chul Kim
Facilities/
Electrical
Steve Ranner
Bianca Trociewitz
CAPS
NSWCCD, Philadelphia
Brian Fitzpatrick
Advice on Navy needs & relevance
Ultera/Southwire
David Knoll
Cable Fabrication
Cryo Dielectrics
Lukas Graber
Horatio Rodrigo
Steinar Dale
Benefits of Helium Gas Cooled
Superconducting Power Devices
Flexibility in operating temperatures (30 K–80 K)
Enhanced superconducting properties at lower temperatures
Lower temperatures allow higher power densities when
necessary
Larger temperature gradients can be maintained without
accompanying a phase change
Easier to integrate with other superconducting devices
operating under helium gas cooling
Increased flexibility in power system design optimization
Helium Gas Based Systems - Challenges
Low heat capacity of helium gas – requires high
pressures and flow rates for efficient heat removal
Helium gas has low dielectric strength – dielectric design
has to depend on the solid dielectric medium
Little experience on helium gas cooled superconducting
power devices
Commercial cryocoolers are inefficient –technological
developments necessary
Current Phase – Validate cryogenic and thermal issues
Monopole
Current rating: 3 kA and @ 77 K (up to 10 kA @ 40 K)