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dc.contributor.authorSun, Jiuce
dc.contributor.authorSanz, Santiago
dc.contributor.authorLeón, Andrés
dc.contributor.authorFraser, Jim
dc.contributor.authorNeumann, Holger
dc.date.accessioned2018-11-19T12:23:44Z
dc.date.available2018-11-19T12:23:44Z
dc.date.issued2017-12-30
dc.identifier.citationSun, Jiuce, Santiago Sanz, Andrés León, Jim Fraser, and Holger Neumann. “Development of a Rotary Union for Gifford-McMahon Cryocoolers Utilized in a 10 MW Offshore Superconducting Wind Turbine.” IOP Conference Series: Materials Science and Engineering 278 (December 2017): 012067. doi:10.1088/1757-899x/278/1/012067.en
dc.identifier.issn1757-8981en
dc.identifier.urihttp://hdl.handle.net/11556/650
dc.description.abstractSuperconducting generators (SCG) show the potential to reduce the head mass of large offshore wind turbines. By evaluating the availability and required cooling capacity in the temperatures range around 20 K, a Gifford-McMahon (GM) cryocooler among all the candidates was selected. The cold head of GM cryocooler is supposed to rotate together with the rotating superconducting coil. However, the scroll compressor of the GM cryocooler must stay stationary due to lubricating oil. As a consequence, a rotary helium union (RHU) utilizing Ferrofluidic® sealing technology was successfully developed to transfer helium gas between the rotating cold head and stationary helium compressor at ambient temperatures. It contains a high-pressure and low-pressure helium path with multiple ports, respectively. Besides the helium line, slip rings with optical fiber channels are also integrated into this RHU to transfer current and measurement signals. With promising preliminary test results, the RHU will be installed in a demonstrator of SCG and further performance investigation will be performed.en
dc.description.sponsorshipThis research is primarily supported by the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement 308793. Thanks for the technical support from Tom Black and Mark Granoff at Ferrotec.en
dc.language.isoengen
dc.publisherInstitute of Physics Publishingen
dc.titleDevelopment of a rotary union for Gifford-McMahon cryocoolers utilized in a 10 MW offshore superconducting wind turbineen
dc.typeconferenceObjecten
dc.identifier.doi10.1088/1757-899X/278/1/012067en
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/308793/EU/SUPerconducting, Reliable, lightweight, And more POWERful offshore wind turbine/SUPRAPOWERen
dc.rights.accessRightsopenAccessen
dc.subject.keywordsGifford-McMahon cryocoolersen
dc.subject.keywordsWind turbineen
dc.subject.keywordsOffshoreen
dc.subject.keywordsSuperconducting generators (SCG)en
dc.identifier.essn1757-899Xen
dc.journal.titleIOP Conference Series: Materials Science and Engineeringen
dc.page.final8en
dc.page.initial1en
dc.volume.number278en
dc.conference.title2017 Cryogenic Engineering Conference, CEC 2017; Monona Terrace Community and Conference CenterMadison; United States; 9 July 2017 through 13 July 2017en


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