June 28, 2015 to July 2, 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Development of high efficiency Stirling cryocooler for high temperature superconducting motor

Jun 29, 2015, 11:30 AM
Tucson Ballroom E

Tucson Ballroom E

Contributed Oral Presentation CEC-03 - Cryocoolers (Non-Aerospace) C1OrA - Cryocoolers for Superconducting Applications


Nakano Kyousuke (Sumitomo Heavy Industries, Ltd.)


For the wide spread of high-temperature superconductor (HTS) devices, a cryocooler having COP of >0.1, compact size, light-weight, high efficiency and high reliability is required. For practical use of superconductive devices, especially HTS motor used for electric vehicle. We developed a high efficiency Stirling pulse-tube cryocooler (STP). STP has high reliability and low vibration. However its efficiency was not enough to meet the demands of HTS motor. To further improve the efficiency, we reconsidered the expander of cryocooler and developed a Stirling cryocooler. A cooling capacity of 151W at 70K and a minimum temperature of 33K have been achieved with compressor input power of 2.15kW. Accordingly, the COP was about 0.07. The detail of cryocooler and the experimental results will be reported in this paper. *This work was supported by Strategic Innovation Program for Energy Conservation Technologies Project of the New Energy and Industrial Technology Development Organization (NEDO) of Japan and a joint research with Sumitomo Electric Industries, Ltd.*

Primary author

Nakano Kyousuke (Sumitomo Heavy Industries, Ltd.)


Dr Yoshikatsu Hiratsuka (Sumitomo Heavy Industries, Ltd.) Yumoto Kenta (Sumitomo Heavy Industries)

Presentation materials