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1、哈尔滨工业大学硕士学位论文AbstractThepulsetubecooler(PTC)isanewtypeofrefrigerator,whichcanmakethecoolpowerbyusingtheprincipleofadiabaticexpanse.UnliketheStirlingorGifford-McMahonrefrigerators,thepulsetubecoolerhasnomovingpartsatthecoldhead.Thelackofcoldmovingpartshasallowedittohavesomeadvantagesoflowmechanic
2、alvibration,highreliability,longlifetime,lowelectromagneticnoiseandsoon,soitisusuallyusedinmanyfields,suchasspacescience,superconductivitytechnology,cryoelectricity,etc.However,itsefficiencyisstilllowerthanthatofthetraditionalcryocoolers,whichisoneofthebarrierstofurtherdevelopmentofthisrefrigera
3、tionmethod.ToinsureacommercialsuccessofthePTCbyreplacementofconventionalcoolersinmostoftheirapplications,itisofmajorimportancetooptimizethePTCandtodemonstrateperformancesandefficienciesascloseaspossibletothoseknownfortheconventionalcryocoolers.Afteradetailedreviewontherecentdevelopmentofthepulse
4、tubecooler,theaimofthecoolingpower7Wat20Kispresented.Thepresentworkfocusesonthefollowingobjects:FirstlyIcalculatetheCoolingpowerofthesingle-stagePTC.IcalculatethetheoreticcoolingpowerbyusingRadebaughenthalpyphasictheory.ThenIsubtractallkindsofenergylossfromthelastresult.SoIgetthegenuinecoolpower
5、ofthesinglestagepulsetubecoolerthatis6.8Wat20K.SecondlyIbuildtheexperimentplatformofthesingle-stagePTC.Theexperimentplatformofthesingle-tagePTCincludesthreepartsofthecoolersystem,themeasuresystemandthevacuumsystem,whichhasadvantagesofhighprecision,agilityoperation,stablecapabilityandsoon.Thisexp
6、erimentplatformisthebaseofgettinggoodresult.LastlyItestthecapabilityofthesinglestagePTC.Iexperimentbychangingtheconditionsofthelongnecktube,thedouble-inlettube,theregenerator’spaddingandthechargingpressure.Afteraseriesofexperiments,IgetthebestresultofthePTC’scapabilitythatthelowestattainableno-l
7、oadrefrigerationtemperatureofthecoldendofPTCis19.8Kandthecoolingcapacityis21Wat39K.--II哈尔滨工业大学硕士学位论文KeywordsPulsetubecooler;Longnecktube;Double-inlettube;20Ktemperaturerange--III哈尔滨工业大学硕士学位论文目录摘要.............................
