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US 20130098037Al (19) United States (12)PatentApplicationPublication (10)Pub.N0.:US2013/0098037A1 Maier (54) ADVANCEDSUPER-CRITICALCO2 EXPANDER-GENERATOR (71) Applicant:WilliamC.Maier,Almond,NY(US) (72) Inventor: WilliamC.Maier,Almond,NY (US) (73) Assignee: Dresser-RandCompany,Olean,NY (US) (21) Appl.No.113/647,972 _ (22) Flledi Oct-912012 _ _ Related U's' Apphcatlon Data (60) Provisional application No. 61/549,434, ?led on Oct. 20’ 201 1_ Publication Classi?cation (43) Pub. Date: Apr. 25, 2013 (52) US.Cl. CPC .......................................F02G1/00(2013.01) USPC ..............................................60/647;60/643 (57) ABSTRACT An expander-generatorisdisclosedhavinganexpansion deviceandageneratordisposedWithinahermetically-sealed housing. The expansion device may be overhung and sup portedonorotherwiserotateaholloWexpansionrotorhaving a thrust balance seal being arranged at least partially Within a chamberde?nedintheexpansionrotor.Partially-expanded Working?uidisextractedfromanintermediateexpansion stageanda?rstportionoftheextractedWorking?uidisused coolthegeneratorandaccompanyingradialbearings-A Sec‘ ondportionoftheextractedWorking?uidmay beintroduced into the chamber de?ned Within the expander rotor via a conduit de?ned in the thrust balance seal chamber. The sec ond portion of extracted Working ?uid minimizes unequal axial thrust loads on the expander rotor due to the overhung arrangement. 238 118 ‘7- X, 236 120 115a 1151) 226 708 116 224 (51) Int.Cl. F 02G 1/00 100\‘ (2006.01) 118 237 112 106 106D A 202 224 214 218 230 232 206PDF Image | ADVANCED SUPERCRITICAL CO2 EXPANDER GENERATOR
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