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Development of a pneumatic GM cryocooler with dual-displacer

Bao, Qian; Xu, Mingyao; Morie, Takaaki


As an alternative to conventional low temperature superconducting (LTS) materials, high temperature superconducting (HTS) materials have the potential to significantly reduce the cooling cost due to their higher critical temperature. Usually proportional to the physical size of the cooling object, cost reduction is especially conspicuous in large scale applications including power transmission cable and power generator. On the other hand, relatively high cooling capacity, roughly around 102 W to 104 W, remains indispensable for most cryocooler consumers in HTS area. In order to fulfill this requirement, a single-stage, dual-displacer, pneumatic type GM cryocooler has been developed at Sumitomo Heavy Industries, Ltd.(SHI). GM type cryocoolers can be more compact and efficient compared with the currently available large-scale Turbo-Brayton cryocoolers. The main difficulty, however, is that the force needed to drive the displacer increases with the cooling capacity at the same time, which leads to the scale-up of the housing and consequently impairs the reliability of the whole system. To overcome this problem, a pneumatic type design is proposed in which the driving force is substituted by the pressure difference of helium gas. ... mehr

Volltext §
DOI: 10.5445/IR/1000075582
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Poster
Publikationsjahr 2017
Sprache Englisch
Identifikator urn:nbn:de:swb:90-755825
KITopen-ID: 1000075582
HGF-Programm 37.06.02 (POF III, LK 01) New Power Network Technology
Veranstaltung 2nd International Workshop on Cooling Systems for HTS Applications (IWC-HTS), Karlsruhe, Germany, 13th - 15th September 2017
Bemerkung zur Veröffentlichung Author affiliation: Sumitomo Heavy Industries, Ltd., Japan
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