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有机朗肯循环向心透平变工况特性与调节方式研究.docx

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有机朗肯循环向心透平变工况特性与调节方式研究 Title:ResearchonPerformanceandRegulationMethodsofOrganicRankineCycleandCentrifugalCompressorinVariableOperatingConditions Abstract: TheOrganicRankineCycle(ORC)combinedwithacentrifugalcompressorhasgainedsignificantattentionduetoitspotentialforefficientlyconvertinglow-gradewasteheatintousefulelectricalpower.ThispaperaimstoinvestigatetheperformancecharacteristicsandregulationmethodsoftheORCandcentrifugalcompressorinvariableoperatingconditions.Experimentalandnumericalapproacheshavebeenemployedtoanalyzethethermodynamicperformance,heattransfer,andflowcharacteristicsunderdifferentworkingconditions.Moreover,variouscontrolstrategiesarediscussedforoptimizingthesystem'sperformanceandregulatingtheORC'soperation. 1.Introduction Theincreasingglobalenergydemandandenvironmentalconcernshavedriventhedevelopmentofrenewableenergytechnologies,suchasORC-basedsystems.TheORCutilizeslow-temperatureheatsources,includingwasteheatfromindustrialprocessesorsolarthermalenergy,togenerateelectricity.ThecentrifugalcompressorplaysacrucialroleinpressurizingtheworkingfluidandenhancingtheefficiencyoftheORCsystem.ThisstudyfocusesoninvestigatingtheperformanceandregulationmethodsoftheORCandcentrifugalcompressorinordertoenhancetheiroverallefficiencyandoperationalflexibility. 2.OrganicRankineCycle(ORC) ThissectionprovidesanoverviewoftheORC,includingitsworkingprinciple,thermodynamicprocesses,andtypicalcomponents.Differentworkingfluidsandtheirrespectiveimpactsonsystemperformanceandheattransfercharacteristicsarediscussed.Theeffectsofvariousoperatingparameters,suchaspressure,temperature,andmassflowrate,ontheORC'sperformanceandefficiencyarealsoinvestigated. 3.CentrifugalCompressor Theprincipleofoperation,designconsiderations,andperformancecharacteristicsofthecentrifugalcompressorarepresentedinthissection.Thecompressor'sgeometricparameters,suchasimpellerdiameterandbladeangle,arediscussedinrelationtotheirimpactonperformance.Theeffectsofdifferentworkingfluidsandoperatingconditionsonthecompress