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US 8,286,425B2 12 ENERGYCONVERSIONSYSTEMWITH motive?uidtoenterthe?rstradial?oWpassageina?rst DUPLEX RADIAL FLOW TURBINE CROSS-REFERENCE TO RELATED APPLICATIONS ThisapplicationclaimsprioritytoUS. ProvisionalPatent Application Ser. No. 61/254,515, Which Was ?led on Oct. 23, 2009. This priority application is hereby incorporated by reference in its entirety into the present application, to the extentthatitisnotinconsistentWiththepresentapplication. BACKGROUND Thisdisclosurerelatesingeneraltoenergyconversion,and inparticulartotheconversionofenergysuchas,forexample, ocean Wave energy, into mechanical rotational shaft energy. To convert ocean Wave energy into mechanical rotational shaft energy, a Wave chamber may be operably coupled to an airturbinehavingashaft,WiththeWavechamberincludingan oscillating Water column disposed therein. In response to the oscillation of the Water column, air ?oWs into and out of the Wavechamberandthustheairturbine,causingtheshaftofthe airturbinetorotate.As aresult,mechanicalrotationalshaft energyisextractedfromtheoscillatingWatercolumn.HoW ever, in some cases, the cyclically reversing air ?oW to and fromtheWave chamberrequirestheuseofconventionaluni directional turbines that are arranged to accept air ?oW in opposite directions, Which use, in turn, requires the use of a complex netWork of one-Way valving that may be prone to high maintenance costs and/or component failure. In other cases,thecyclicallyreversingair?oW toandfromtheWave chamberrequirestheuseofanairturbinecon?guredtoaccept ?oW intWo oppositedirections,Whichuse,inturn,resultsin turbine e?iciency losses, system siZe increases, cost increases, and/or any combination thereof. Therefore, What isneeded isan energy conversion system orcon?gurationthatovercomes one ormore oftheproblems describedabove. SUMMARY 20 25 30 35 40 radialdirectionandtosubstantiallyprohibitthemotive?uid from ?oWing out of the ?rst radial ?oW passage in a second radialdirection.The radial?oW turbinemay furtherinclude second vanes disposed atleastpartially inthe second radial ?oW passage,thesecondvanesbeingcon?guredtoresiliently pivotopentoalloWthemotive?uidto?oW outofthesecond radial?oW passageinthesecondradialdirectionandtopivot closedtosubstantiallyprohibitthemotive?uidfrom?oWing intothesecondradial?oW passageinthe?rstradialdirection. Embodiments of the disclosure may further provide a methodforrotatingashaft.Themethodmay includepivoting ?rst vanes from a ?rst position to a second position to open a ?rst radial ?oW passage, the ?rst vanes being compliantly mountedinthe?rstradial?oW passage,anddraWingamotive ?uidthroughthe?rstradialpassageina?rstradialdirection, past a turbine Wheel coupled to the shaft, and into a Wave chamber. The method may also include pivoting the ?rst vanesfromthesecondpositiontothe?rstpositiontoclosethe ?rstradial?oWpassage,andpivotingsecondvanesfroma ?rstpositiontoasecondpositiontoopen asecondradial?oW passage, the second vanes being compliantly mounted in the second radial ?oW passage. The method may also include draWingthemotive?uidto?oW outoftheWavechamber,past theturbineWheel,andthroughthesecondradial?oWpassage in a second radial direction. BRIEF DESCRIPTION OF THE DRAWINGS ThepresentdisclosureisbestunderstoodfromthefolloW ing detailed description When read With the accompanying Figures. It is emphasiZed that, in accordance With the stan dardpracticeintheindustry,variousfeaturesarenotdraWnto scale.Infact,thedimensionsofthevariousfeaturesmay be arbitrarilyincreasedorreducedforclarityofdiscussion. FIG. 1 is a perspective vieW of a section of an energy conversion system, according to an exemplary embodiment. FIG.2isanelevationalvieWofaradial?oW turbineofthe energy conversion system, according to an exemplary embodiment. FIG.3isasectionalvieWoftheradial?oW turbine,accord ing to an exemplary embodiment. FIG. 4 is a partial perspective vieW of the radial ?oW turbine,accordingtoanexemplaryembodiment. FIG. 5 is a partial sectional vieW the radial ?oW turbine, according to an exemplary embodiment. FIG. 6 is a partial perspective vieW of the radial ?oW turbine,accordingtoanexemplaryembodiment. FIG. 7 is a partial plan vieW of the radial ?oW turbine, accordingtoanexemplaryembodiment. FIG. 8 is a partial perspective vieW of the radial ?oW turbine,accordingtoanexemplaryembodiment. FIG. 9 is an enlarged vieW ofa portion of FIG. 8. FIG. 10 is a partial perspective vieW of the radial ?oW turbine,accordingtoanexemplaryembodiment. FIG. 11 is a partial perspective vieW of the radial ?oW turbine,accordingtoanexemplaryembodiment. FIG. 12 is a ?oWchart of a method of rotating a shaft, according to an exemplary embodiment. FIG. 13 isa ?oWchart of another method ofrotating a shaft, according to an exemplary embodiment. DETAILED DESCRIPTION It is to be understood that the folloWing disclosure describes several exemplary embodiments for implementing different features, structures, or functions of the invention. Embodiments of the disclosure may provide an energy conversion system. The energy conversion system may include a Wave chamber, and a turbine Wheel coupled to a 45 shaft and ?uidly coupled With the Wave chamber. The energy conversionsystemmay alsoincludea?rstradial?oW passage ?uidlycoupledWiththeWavechamberandtheturbineWheel, and?rstvanesdisposedatleastpartiallyinthe?rstradial?oW passage,eachofthe?rstvanesbeingcompliantlymounted andpivotalbetWeen?rstandsecondpositions,the?rstvanes beingcon?guredtoalloWamotive?uidto?oW ina?rstradial direction through the ?rst radial ?oW passage When the ?rst vanes are in the ?rst position, and the ?rst vanes being con ?guredtosubstantiallypreventthemotive?uidfrom?oWing throughthe?rstradial?oW passageinasecondradialdirec tion When the second vanes are in the second position. Embodiments ofthedisclosuremay alsoprovideanenergy conversion system including a Wave chamber disposed at leastatleastpartiallyinabodyofWater,andaradial?oW 60 turbine. The radial ?oW turbine may include ?rst and second radial ?oW passages ?uidly coupled With the Wave chamber andaturbineWheelcoupledtoashaftandpositionedbetWeen the Wave chamber and the ?rst and second radial ?oW pas sages. The radial ?oW turbine may also include ?rst vanes disposedatleastpartiallyinthe?rstradial?oW passage,the ?rst vanes being con?gured to resiliently pivot to alloW a 50 55 65PDF Image | ENERGY CONVERSION SYSTEM WITH DUPLEX RADIAL FLOW TURBINE
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