The Thermal Performance of a 1.5 MVA HTS Generator

J. A. Urbahn, R. A. Ackermann, X. Huang, E. T. Laskaris, K. Sivasubramaniam, A. Steinbach

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A 1.5-MVA high temperature superconducting (HTS) generator of novel design has been designed, built and successfully tested by the General Electric Company. The 1.5- MVA generator has served as the engineering prototype for a much larger 100-MVA beta unit now under design. The HTS coil in the 1.5 - MVA demonstrator is designed to operate in the range of 20-40 K and is cooled with a closed-cycle helium refrigeration system employing GM type cryocoolers. This paper will discuss the calculation of the thermal loads to the rotor from all anticipated sources. These sources include conduction losses through the coil suspension system, radiative heat loads to the cold-system components, residual gas conduction losses, helium-transfer coupling losses and lead losses. These predicted losses were compared to those measured during actual electrical testing of the rotor at 3600 RPM in order to validate the predictive calculations employed for the 100 MVA machine.

Original languageEnglish (US)
Title of host publicationAdvances in Cryogenic Engineering
Subtitle of host publicationTransactions of the Cryogenic Engineering Conference - CEC
EditorsJohn Pfotenhauer, Steven Van Sciver, Albert Zeller, Jonathan Demko, Christopher Rey, John G. Weisend II, John Barclay, Michael DiPirro, Quan-Sheng Shu, Peter Kittel, Edward Daly, John R. Hull, Jennifer Lock, Joseph Waynert, Susan Breon, James Maddocks, John Zbasnik, Patrick J. Kelley, Arkadiy Klebaner
PublisherAmerican Institute of Physics Inc.
Number of pages10
ISBN (Electronic)0735401861
StatePublished - Jun 23 2004
Externally publishedYes
Event2003 Cryogenic Engineering Conference, CEC 2003 - Anchorage, United States
Duration: Sep 22 2003Sep 26 2003

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other2003 Cryogenic Engineering Conference, CEC 2003
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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