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采用有机朗肯循环的低温区域供热系统性能分析（英文）.docx

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采用有机朗肯循环的低温区域供热系统性能分析（英文） PerformanceAnalysisofLowTemperatureHeatingSystemwithOrganicRankineCycle Abstract:Inrecentyears,withtheincreasingdemandforenergyconservationandemissionreduction,lowtemperatureheatingsystemshaveattractedgreaterattention.TheOrganicRankineCycle(ORC)systemhastheadvantagesofgoodadaptability,highefficiency,andlowpollution,andithasbeenwidelyusedinlow-gradeheatrecoverypowergenerationandindustrialwasteheatrecovery.ThispaperfocusesontheperformanceanalysisoftheORCsysteminthelow-temperatureheatingsystem,whichincludesthebasicprinciplesoftheORCsystem,theselectionofworkingfluids,thethermodynamicmodeloftheORCsystem,andthecomprehensiveperformanceevaluationoftheORCsystem. Keywords:OrganicRankineCycle,lowtemperatureheatingsystem,workingfluidselection,performanceevaluation. 1.Introduction Lowtemperatureheatingsystemshavebeenwidelyusedinvariousfields,includingdistrictheating,industrialprocessheat,andbuildingheating.Asoneofthekeycomponentsoflowtemperatureheatingsystems,thethermalpowergenerationtechnologyhasbeendevelopedrapidlyinrecentyears.TheORCsystemisanefficientandenvironmentallyfriendlyconversiontechnologythatcanconvertlow-gradeheatsourcesintoelectricalenergy.ComparedwiththetraditionalsteamRankinecycle,ithastheadvantagesofhighefficiencyandgoodadaptabilitytolow-temperatureheatsources. 2.WorkingFluidSelection TheselectionofworkingfluidisoneofthekeyfactorsinfluencingtheperformanceoftheORCsystem.Theworkingfluidshouldhaveasuitableboilingpoint,highcriticaltemperatureandpressure,lowenvironmentalimpact,andgoodthermodynamicproperties.Basedontheabovecriteria,avarietyofworkingfluidshavebeenproposedandappliedintheORCsystem,includinghydrocarbons,halogenatedhydrocarbons,fluorocarbons,andnaturalworkingfluids.Inaddition,theselectionofworkingfluidsalsorequiresconsiderationofsystemsafety,environmentalprotection,andeconomicfactors. 3.ThermodynamicModelofORCSystem ThethermodynamicmodeloftheORCsystemisbasedontheprincipleoftheRankinecycle,whichincludestheevaporator,theturbine,thec