Abstract: Hightemperatureheatpipereceiversarecommonlyusedasacorecomponentofspacesolardynamicpowersystem.Onthebaseofheatconductiongoverningdifferentialequationundermicrogravity,two-dimensionalnumericalanalysisofPCMcontainerwasconductedbyaenthalpymethod.Withbothvoidcavityandphasechangeconsidered,thermalperformanceofheatpipereceiverwasanalyzed.NumericalresultswerecomparedwithNASAresults.Theaccuracyofcalculationmodelundergravitywasverified.Theresultsindicatethatvoidcavityinfluencestheprocessofphasechange.ThevoidcavityreducestheutilityandthermalstorageabilityofPCM.ThetemperaturegradientofPCMzoneisverysignificantbecauseofthevoidcavity.ThePCMcontainedintheintegratedheatpipeperformstheaveragingfunctionoftheheatloads.Normalworkingofwickensurestheuniformityofheatpipe,thusheatpipereceiveralleviatesthermalspotandthermalratcheting.

Key words: Spacesolarpowersystem, Heatpipereceiver, Phasechangematerial, Voidcavity, Phasechange, Spacecraft