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基于Fluent的地下U型埋管换热器传热温度场模拟分析.docx

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基于Fluent的地下U型埋管换热器传热温度场模拟分析 Abstract Inthispaper,asimulationanalysisoftheheattransfertemperaturefieldintheundergroundU-shapedpipeheatexchangerbasedonFluentispresented.Thesimulationaimstoinvestigatethecharacteristicsoftheheattransferperformanceunderdifferentworkingconditions,thermalloads,andgeometries.TheresultsshowthattheU-shapedpipeheatexchangerhasgoodheattransferperformanceandcanmeettherequirementsofpracticalengineering. Introduction TheundergroundU-shapedpipeheatexchangeriswidelyusedinthefieldsofgeothermalenergyutilization,airconditioning,andindustrialwasteheatrecoveryduetoitshighefficiencyandenvironmentalprotectioncharacteristics.TheheattransferperformanceoftheU-shapedpipeheatexchangeristhekeyfactoraffectingitsengineeringapplication.Therefore,thestudyoftheheattransferperformanceoftheU-shapedpipeheatexchangerisofgreatsignificanceforimprovingitsengineeringapplicationandreducingenergyconsumptionandemissionpollution. SimulationModel ThesimulationmodeloftheU-shapedpipeheatexchangerisestablishedbasedontheFluentsoftware.Thesimulationmodelincludesthegeometrymodel,meshmodel,andboundaryconditions. GeometryModel ThegeometryoftheU-shapedpipeheatexchangerisobtainedfromtheengineeringdrawing,andthemodelisestablishedbasedonthethree-dimensionalmodellibraryintheFluentsoftware.ThemodelincludestheU-shapedpipe,theconnectingpipe,andthesurroundingsoil. MeshModel Themeshmodelisestablishedbasedonthegeometrymodel,andtheboundaryconditionsaresetaccordingtotheactualworkingconditionsoftheU-shapedpipeheatexchanger.ThemeshmodelisshowninFigure1. BoundaryConditions Theboundaryconditionsofthesimulationmodelincludetheinletandoutletflowconditions,theheatsourceandsinkconditions,andthesurroundingsoilconditions.ThespecificsettingsareshowninTable1. SimulationResultsandDiscussion ThesimulationresultsoftheheattransfertemperaturefieldoftheU-shapedpipeheatexchangerareobtainedbasedontheFluentsoftware.TheresultsincludethetemperaturedistributionoftheU-shapedpipe,theheattransferrate,andthethermalefficiency. Te