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Spacecraft Thermal Control - NASA

EncyclopediaofPhysicalScienceandTechnolo gy,ThirdEditionbyAcademicPress(Finaldraf tdated,March30,2001)SpacecraftThermalCon trol/' :DescriptionSpacecraftThermalRequirement sandSpaceThermalEnvironmentsDesign,Analy sis,andTestingThermalControlHardwareLaun chandFlightOperationsAdvancedTechnologie sforFutureSpacecraftGlossaryAlbedoThefra ctionofincidentsolarenergythatisreflecte dofaplanetarybodyAstronomicalUnit(AU) ' ,asteroids, (LEO)Orbitswhosemaximumaltitudesarelesst hanapproximately1, (GEO)Anorbitintheplaneoftheequatorwhosep eriodmatchestheEarth'srotation,thus,thes pacecraftremainsoverthesamelocationofthe EarthatalltimesMultilayerinsulation(MLI) (RItU) , (RTG)Acompactspacepowersystem, ,long-lastingsourceofelectricitythatisre lativelyinsensitivetothechillingcoldofsp aceandvirtuallyinvulnerabletohighradiati onfields,suchasEarth'sVanAllenbeltsandJu piter' :Thediscipline, :DESCRIPTIONTheThermalControlSystem(TCS) ,longtermsurvival, 'sexternalthermalenvironment,itsinternal heatgeneration( ,wasteheatfromtheoperationofelectricaleq uipment), ; ,spacecraftinorbitaroundEarthoranotherpl anetwillhaveavariableexternalenvironment iftheirorbitpassesthroughtheplanet' ,MultiLayerInsulation(MLI)blankets,two-p hasedevices(suchasheatpipes, ),mechanicallouvers,thermalstraps,heater s,RadioisotopeHeaterUnits(RHUs),thermost ats,temperaturesensors,mechanicalpumpsto circulateheattransferliquids, ,shownwithitsthermalcontrolsysteminFigur e2, ,des

Mar 30, 2001 · Radioisotope Thermoelectric Generator (RTG) A compact space power system, which ... (1 to 10 kW) and the thermal control system needs to remove the heat to keep the transmitters, electronic equipment, and scientific equipment …

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