›› 2017, Vol. 37 ›› Issue (6): 68-.doi: 10.16708/j.cnki.1000-758X.2017.0049

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Designandapplicationofheatpipethermalswitchonlunarbasedultraviolettelescope

 ZHANG  Bing-Qiang, 吕Wei , ZHANG  You-Wei, LI  Fu, LIU  Zi-Jun, GUO  Lin, MIAO  Jian-Yin   

  1. 1BeijingInstituteofSpacecraftSystemEngineering,Beijing100094,China
    2BeijingKeyLaboratoryofSpaceThermalControlTechnology,Beijing100094,China
    3Xi′anInstituteofOpticsandPrecisionMechanics,ChineseAcademyofSciences,Xi′an710119,China
  • Received:2016-12-19 Revised:2017-04-21 Online:2017-12-25 Published:2017-06-29

Abstract: Inthebrutaltemperatureenvironmentinmoonsurfacewiththerangeof-180℃to90℃,itneedstosolvetheLunarBasedUltravioletTelescope(LUT)heatdissipationduringlunardaytimeandheatpreservationduringmoonlitnightwithoutelectricenergysupply.Inordertosolvetheheatconsumptiontransmission,discharge,andtheheatpreservationproblemofmoonnight,apassiveheatpipethermalswitch(HPTS)wasproposedasameansoflongdistanceheattransferbetweenthedeviceandtheradiator,accordingtothephasetransitioncharacteristicsoftheworkingfluid.Dependingontheequipmenttemperatureindex,aworkingfluidwithsuitablefreezingpointandheattransfercapacitywasselected.TheHPTSwasfilledwithworkingfluid,whichcantransmitenergyfromevaporatortocondenserbyphasechange.Inextremelylowtemperatureofthenight,theworkingfluidisfrozen,itcausestheconnectiontobeinterrupted,andthentheLUTcanbemaintainedabovethesurvivaltemperature.IthasbeenproventhroughthegroundtestandinorbitresultthattheswitchingratioofHPTSisgreaterthan30nearthefreezingpoint.Ataworkingtemperatureof7℃,theheattransfercapacityofHPTSisgreaterthan15W,andheattransfertemperaturedifferenceislessthan4℃.Inaddition,theHPTScanaccommodateLander′stiltof±15°.AllthepropertiesoftheHPTSensurethattheLUTonLanderworksinorbitwithhighperformance.

Key words: Chang′E3Lander, lunarbasedultraviolettelescope, heatpipethermalswitch, conductanceratio