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US 2011/0113786 A1 May 19,2011 [0014] InfurtheraccordanceWiththeembodimentshown, second ?uid system 48 includes a pump 74 that is ?uidly connectedtoevaporator60viaaconduit76.Evaporator60is, in turn, linked to a turbine 79 via a conduit 80. Turbine 79 is linked to a condenser 83 via a conduit 84. Condenser 83 is linked to pump 74 via a conduit 86 thereby closing second ?uid system 48. Condenser 83 includes a cooling ?uid circuit 90 that iscoupled to a cooling device (not shoWn). Of course it should be understood that the particular type of cooling device can vary and could include Water cooling, air cooled condensers,andthelike.More speci?cally,pump 74pressur izestheorganic?uid?oWingthroughsecond?uidsystem48. The pressurized ?uid passes through evaporator 60 and exchangesheatWith?uidpassingthrough?rst?uidsystem 45. The heated organic ?uid passes through conduit 80 to turbine79.Work isextractedfromtheheated?uidinturbine 79 and converted to, for example, mechanical energy that is employed to operate a mechanical device such as a generator, aWaterpump, anoilpump, anaircompressororthelike(not shoWn).Theheatedorganic?uidthenpassestocondenser83 via conduit 84. At this point, cooling ?uid coming from the cooling toWer exchanges heat With the organic ?uid. The organic?uid,noW ataloWertemperature,returnstopump 74 to restart the heat exchange cycle. At this point it should be understoodthatthelocationofvariousjunctionpointsinthe exemplary embodiment could vary in accordance With an exemplaryembodiment.Forexample,?rstjunctionpoint31 is located at a position Where exit temperature of economizer 26 is substantially similar to the temperature of ?uid ?oWing throughconduit62. [0015] ReferenceWillnoWbemadetoFIG.2indescribing a combined cycle poWer plant 102 constructed in accordance Withanotherexemplaryembodiment oftheinvention.Com bined cycle poWer plant 102 includes a gas turbomachine 104 operativelylinkedtoanHRSG 106.Gasturbomachine104 includes a compressor portion 110 operatively linked to a turbineportion112viaacombustorportion114.HRSG 106 includes an HP portion 119, an IP portion 120 and an LP portion 121 having a loW pressure drum 122. LoW pressure portion 121 is also shoWn to include an economizer 123 that is?uidlycoupledtoafeedpump 125thatdeliversheated?uid to LP portion 121. Economizer 123 includes a ?rst econo mizer portion 126 ?uidly linked to a second economizer portion128viaa?rstjunctionpoint131.Secondeconomizer portion 128 is linked to loW pressure drum 122 via a second junctionpoint133.Inaddition,HRSG 106includesanIP economizer 135 ?uidly linked to second junction point 133. In accordance With the exemplary embodiment shoWn, com bined cycle poWer plant 102 includes an Organic Rankine Cycledevice140operativelycoupledtoHRSG 106. [0016] OrganicRankineCycledevice140includesa?rst ?uidsystem145thatisinaheatexchangerelationshipWitha second,closedloop,?uidsystem148.A supplyconduit158 extends betWeen an outlet 159 of IP economizer 135 and an evaporator 160 that is integrated With second ?uid system 148.A returnconduit162extendsfromevaporator160,toa pump 165,andthento?rstjunctionpoint131.Inamanner similartothatdescribedabove,heatentrainedWithinthe?uid passing through ?rst ?uid system 145 is exchanged With an organic ?uid ?oWing through second ?uid system 148 at evaporator160. conduit180.Turbine179is?uidlyconnectedtoacondenser 183 via a conduit 184. Condenser 183 is then ?uidly con nected to pump 174 via a conduit 186 thereby closing the second ?uid system 148. Condenser 183 is also coupled to a cooling ?uid circuit 190, Which, in 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 cooledcondensers,andthelike.More speci?cally,pump 174 pressurizes the organic ?uid ?oWing through second ?uid system148.Thepressurized?uidpassesthroughevaporator 160 and exchanges heat With ?uid passing through ?rst ?uid system145.Theheatedorganic?uidpassesthroughconduit 180 toturbine 179. Work isextractedfrom theheated ?uid in turbine179andconvertedto,forexample,mechanicalenergy that is employed to operate a mechanical device such as a generator, a Water pump, an oil pump, an air compressor or the like (not shoWn). The heated organic ?uid then passes to condenser 183 via conduit 184. At this point, cooling ?uid coming from the cooling toWer exchanges heat With the organic?uid.Theorganic?uid,noW ataloWertemperature, returnstopump 174torestarttheheatexchangecycle.Atthis point it should be understood that the location of various junction points in the exemplary embodiment could vary in accordance With an exemplary embodiment. That is, ?rst junctionpoint131couldbelocateddirectlyadjacentaninlet of economizer 126, adjacent an exit of economizer 128 or anyWherein-betWeen. [0018] ReferenceWillnoWbemadetoFIG.3indescribing a combined cycle poWer plant 202 constructed in accordance Withyetanotherexemplaryembodiment.Combinedcycle poWer plant 102 includes a gas turbomachine 204 that is operativelylinkedtoanHRSG 206.Gasturbomachine204 includes a compressor portion 210 operatively linked to a turbineportion212viaacombustorportion214.HRSG 206 includesanHP portion219,andanIPportion220havingan IPpressuredrum222.HRSG 206isalsoshoWntoincludean economizer 223 ?uidly connected to a feed pump 225 that delivers heated ?uid to IP portion 220. Economizer 223 includesa?rsteconomizerportion226,asecondeconomizer portion228,andathirdeconomizerportion230.Firstecono mizerportion226islinkedtosecondeconomizerportion228 via a ?rstjunction point 231, While second economizer por tion 228 is linked to third economizer portion 230 via a secondjunctionpoint233.A thirdjunctionpoint235links third economizer portion 230 With IP drum 222. In a manner similartothatdescribedabove,combinedcyclepoWerplant 202 includes an Organic Rankine Cycle device 240 that is ?uidlyconnectedtoHRSG 206. [0019] OrganicRankineCycledevice240includesa?rst ?uidsystem245thatisinaheatexchangerelationshipWitha second,closedloop,?uidsystem248.A supplyconduit258 extends from second junction point 233 to an evaporator 260 that is integrated With second ?uid system 248. A return conduit262leadsfromapump 265backto?rstjunctionpoint 231. With this arrangement, heat entrained Within ?uid pass ing through ?rst ?uid system 145 is exchanged With an organic ?uid ?oWing through second ?uid system 248 in a manner that Will be described more fully beloW. [0020] Second?uidsystem248includesapump274thatis ?uidlyconnectedtoevaporator260viaaconduit276.Evapo [0017] Second?uidsystem148includesapump174thatis rator260is,inturn,?uidlylinkedtoaturbine279viaa ?uidly connected to evaporator 160 via a conduit 176. Evapo conduit 280. Turbine 279 is linked to a condenser 283 via a rator 160 is also ?uidly connected to a turbine 179 via a conduit284.Condenser283is?uidlyconnectedtopump 274PDF Image | COMBINED CYCLE POWER PLANT WITH INTEGRATED ORC
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