The outline of a design for a liquid hydrogen cooled generator rotor that could be used to fabricate a 20 megawatt cryogenic generator is presented. The armature of an existing 20 megawatt superconducting generator could be utilized in this new cryogenic generator concept without electrical modification and with minimum modification to its housing. A hydrogen cooled aluminum rotor would eliminate requirements for helium liquefiers/refrigerators, expensive superconductors and extra vacuum and magnetic shielding in superconducting generator rotors. Ideally the aluminum rotor could utilize the higher cryogenic temperatures of liquid hydrogen at 21 K as conductor coolant and not require the fabrication techniques of a superconducting generator rotor. A most likely conductor candidate is high purity aluminum which has 1/500th its room temperature resistance at liquid hydrogen temperatures. Recent research has indicated the feasibility of fabricating high-purity aluminum conductors in a composite conductor form.
Cryogenic aluminum-wound generator rotor concept
Mit Fluessigwasserstoff gekuehlter Generator unter Ausnutzung des erwaermten Wasserstoffs als Gasturbinentreibstoff
1985
4 Seiten, 6 Bilder, 1 Tabelle, 13 Quellen
Conference paper
English
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