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US 2011/0113786 A1 May 19,2011 via a conduit 286 thereby closing second ?uid system 248. Condenser 283 is in a heat exchange relationship With a cooling ?uid circuit 290, Which, in a manner similar to that describedabove,islinkedtoacoolingdevice(notshoWn).Of course it should be understood that the particular type of cooling device can vary and could include Water cooling, air cooled condensers, and the like. In further accordance With theexemplaryembodiment,combinedcyclepoWerplant102 includes a fuel moisturiZation system 294 operatively coupledtoHRSG 206.More speci?cally,fuelmoisturiZation system 294 includes a ?rst conduit 296 that iscoupled to third junctionpoint235andasecondconduit297thatiscoupledto ?rstjunctionpoint231. [0021] Withthisarrangement,pump174pressuriZesthe organic ?uid ?oWing through second ?uid system 148. The pressurized ?uid passes through evaporator 160 and exchangesheatWith?uidpassingthrough?rst?uidsystem 145. The heated organic ?uid passes through conduit 180 to turbine179.Work isextractedfromtheheated?uidinturbine 179 and converted to, for example, mechanical energy that is employed to operate a mechanical device such as a generator, aWaterpump, anoilpump, anaircompressororthelike(not shoWn). The heated organic ?uid then passes to condenser 183viaconduit184.Atthispoint,cooling?uidcomingfrom thecoolingtoWerexchangesheatWiththeorganic?uid.The organic ?uid, noW at a loWer temperature, returns to pump 174 to restart the heat exchange cycle. Fuel moisturiZation system 294 saturates a dry-fuel supply to turbomachine 204 in a manner knoWn in the art. [0022] Atthispointitshouldbeunderstoodthattheloca tion of the various connection points illustrated in FIG. 3 could vary in accordance With an exemplary embodiment. For example, the location of ?rst junction point 231 could vary. That is, conduit 262 could also connect to an inlet of econo miZer 226. Similarly, conduit 297 can be coupled to an inlet of economiZer 226 or to junction 233. LikeWise, the location of secondjunctionpoint233couldvary.Thatis,secondjunction point could be located directly adjacent an inlet of econo miZer 228, adjacent an exit of economiZer 230 or anyWhere therebetWeen. Also, the location of third junction point 235 could vary. That is, conduit 296 could extend from second junction point 233 and conduit 297 could be coupled to economiZer 226 or to second junction 233. It should also be understoodthattheexemplaryembodimentscouldbeimple mentedinvarioustypesofORC devicesandshouldnotbe limitedtoanyparticularORC con?gurationortheexemplary ORC con?gurationsshoWnanddescribedherein. [0023] Withthisarrangement,theexemplaryembodiments take enhance energy extraction e?iciencies associated With loWtemperaturesystemssuchasthoseemployedingeother malapplications.Thatis,incontrasttoloWere?iciencysteam systems the exemplary embodiment employs an Organic RankineCycleDevicetoenhancee?icienciesassociatedWith converting heat energy ?oWing through the loW pressure economiZer produced from, for example, a geothermal heat exchange system to poWer other systems such as, generators. Organic Rankine Devices typically have an elevated turbine e?iciency, realiZe loW mechanical stress on the turbine due to loWperipheralspeeds;provideloWrpmoutputoftheturbine thereby alloWing direct drive of associated components such as generators Without the need for additional costly compo nents such as reduction drives; and realiZe loW maintenance costs.Thatis,theabsenceofmoistureintheorganicRankine cycle enhances turbine blade life. Without moisture, turbine blades tend not to Wear or shoW erosion characteristics asso ciated With steam systems. [0024] Whiletheinventionhasbeendescribedindetailin connection With only a limited number of embodiments, it shouldbereadilyunderstoodthattheinventionisnotlimited to such disclosed embodiments. Rather, the invention can be modi?edtoincorporateanynumberofvariations,alterations, substitutions or equivalent arrangements not heretofore described, but Which are commensurate With the spirit and scope of the invention. Additionally, While various embodi ments ofthe inventionhave been described, itistobe under stoodthataspectsoftheinventionmay includeonlysomeof thedescribedembodiments.Accordingly,theinventionisnot tobeseenaslimitedbytheforegoingdescription,butisonly limitedbythescopeoftheappendedclaims. 1.A combinedcyclepoWerplantcomprising: a gas turbomachine including a compressor portion and a turbineportion; a heat recovery steam generator (HRSG) operatively coupledtotheturbineportionofthegasturbomachine; and an organic Rankine cycle (ORC) device ?uidly coupled to the heat recovery steam generator, the ORC device includinganorganic?uidpassingthroughaclosedloop systemoperativelycoupledtoaturbine,Whereinheated ?uid from the HRSG elevates a temperature of the organic ?uid passing through the closed loop system, thermal energy from the organic ?uid is converted to mechanical energy in the turbine. 2.ThecombinedcyclepoWerplantofclaim1,Whereinthe HRSG includesatleastoneeconomiZer. 3. The combined cycle poWer plant according to claim 2, Wherein the at least one economiZer comprises at least one loW pressure economiZer, the ORC device being ?uidly coupled to the at least one loW pressure economiZer. 4. The combined cycle poWer plant according to claim 2, Wherein the HRSG includes a loW pressure drum ?uidly linkedtotheatlastone loW pressureeconomiZer,theORC device being ?uidly connected to each of the loW pressure economiZer and the loW pressure drum. 5. The combined cycle poWer plant according to claim 4, Wherein the at least one loW pressure economiZer includes a ?rst loW pressure economiZer and a second loW pressure economiZer, the ORC device being ?uidly connected betWeen the ?rst and second loW pressure economiZers and the loW pressure drum. 6. The combined cycle poWer plant according to claim 2, Wherein the at least one economiZer includes a loW pressure economiZer and an intermediate pressure economiZer, the ORC being ?uidly connected betWeen the loW pressure economiZer and the intermediate pressure economiZer. 7. The combined cycle poWer plant according to claim 2, Wherein the at least one economiZer comprises at least one an intermediatepressureeconomiZer,theORC devicebeing?u idly coupled to the at least one intermediate pressure econo miZer. 8. The combined cycle poWer plant according to claim 7, Wherein the at least one intermediate pressure economiZer includes a ?rst intermediate pressure economiZer, a second intermediate pressure economiZer, and a third intermediate pressure economiZer. 9. The combined cycle poWer plant according to claim 8, WhereintheORC deviceis?uidlycoupledbetWeenanoutletPDF Image | COMBINED CYCLE POWER PLANT WITH INTEGRATED ORC
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