简介:Thenon-isothermaldecompositionoflead2,4,6-trinitroresorcinatemonohydrate,Pb(TNR)·H2O,wasinvestigatedbymeansofTG-DTA,DSCandIR.Thethermaldecompositionmechanismandthedissociatedkineticswerealsoinvestigated.ThekineticparameterswereobtainedfromtheanalysisoftheDSCcurvesbyintegralanddifferentialmethods.ThemostprobablekineticmodelfunctionofthedehydrationreactionofPb(TNR)·H2Owassuggestedbythecomparisonofthekineticparameters.
简介:Duetotheexistenceofthermaloffsets,globalsolarirradiancesmeasuredbypyranometersaresmallerthanactualvalues,anderrorsarelargerinthedaytime.Untilnow,thereisnouniversally-recognizedcorrectionmethodforthermaloffseterrors.Therefore,itisimperativetoidentifyaconvenientandeffectivecorrectionmethod.Fivecorrectionmethodswereevaluatedbasedonthedatameasuredfromafieldexperimentfrom23Januaryto15November,2011.Resultshaveshown:1)Temporalvariationcharacteristicsofthermaloffsetsinthefourtestedpyranometersareconsistent.2)Amongthefivemethods,non-dimensionalquantitymethodissuggestedforusetocorrectthermaloffsets,becauseitisconvenientandnomodificationofinstrumentsisrequired.Ifcollocatednetlongwaveradiationandwindspeeddataareavailableandtheiruncertaintiesaresmall,thehistoricalsolarradiationdatasetscanalsobecorrected.Andcorrectioneffectsbythemethodarebetter.
简介:Athermalmodelofcrystalisestablished.Thetemperaturefielddifferentialequationofthediode-end-pumpedlasercrystalwithcircularcross-sectionandnewboundaryconditions,inwhichtheconvectionheattransferissupposedtoexistbetweenlasercrystalendsandair,isestablished.Theanalyticalexpressionsoftemperaturefield,thermaldistortionandadditionalopticalpathdifference(OPD)ofcrystalareobtained.Bynumericalcalculation,theinfluenceofheattransferonthethermaleffectsoflasercrystalNd:YAGisstudied.Resultsshowthatcrystal'sthermaleffects,includingtemperaturefield,thermaldistortion,OPDandthermalfocallength,areallweakenedastheheattransferthroughendsofcrystalisstrengthened.Thisconclusioncouldbeusedtocontrolthermaleffectsoflasercrystalandimprovelaserworkingstability.
简介:Thermalplasmawasappliedforthetreatmentofcokewastewatersludgederivedfromthesteelindustryinordertoinvestigatethefeasibilityofthesafetreatmentandenergyrecoveryofthesludge.A30kWplasmatorchsystemwasappliedtostudythevitrificationandgasproductionofcokewastewatersludge.Toxicityleachingresultsindicatedthatthesludgetreatedviathethermalplasmaprocessconvertedintoavitrifiedslagwhichresistedtheleachingofheavymetals.CO2wasutilizedasworkinggastostudytheproductionandheatenergyofthesyngas.Theheatingvalueofthegasproductsbythermalplasmaachieved8.43kJ/L,indicatingthefurtherutilizationofthegasproducts.Consideringtheutilizationofthesyngasandrecoveryheatfromthegasproducts,theestimatedtreatmentcostofcokewastewatersludgeviaplasmatorchwasabout0.98CNY/kgsludgeintheexperiment.Bypreliminaryeconomicanalysis,thedehydrationcosttakesanimportantpartofthetotalsludgetreatmentcost.Thetreatmentcostofthecokewastewatersludgewith50wt.%moisturewascalculatedtobeabout1.45CNY/kgsludgedrybasis.Thetreatmentcostofthecokewastewatersludgecouldbeeffectivelycontrolledbydecreasingthewatercontentofthesludge.Thesefindingssuggestthataneconomicdewateringpretreatmentmethodcouldbecombinedtocutthetotaltreatmentcostinanactualtreatmentprocess.
简介:Recentstudiesindicatedthatexceptfortheland-seathermalcontrast,therealsoexistedtheland-landthermalcontrast.Thecompositeanalysisandt-testmethodareusedtofurtherstudythelocalthermalcontrastvariationovertheAsiancontinent,andtodiscusstheassociationofseasonalvariationoflandthermalstatewithcirculationoverEastAsia,theearlysummerandsummermonsoonactivity,andtheprecipitationanomalyinChinainthedecadalscale.Resultsshowthatthepositivemeridionaltemperatureanomalytransportsdownwardfromuppertroposphericlayersinmiddle-highlatitudesnorthof25°Ninthepositiveyears.Inthezonaldirection,theTibetanPlateauheatinginthesuccessivespringactsasaforcetoinfluencetheatmosphere,leadingtotherapidtemperaturewarmingovereasternChinesecontinent,whichcouldincreasetheland-seathermalcontrastwiththenegativeSSTA.Accordingly,themonsoonactivityinearlysummeroverEastAsianestablishesearlierandthesummermonsoonintensitybecomesstronger.Theearlysummerprecipitationismore-than-normalovertheYangtzeRiver,andthesummerprecipitationismore-than-normaloverthenorthChinaandthesouthwestChina.Thesituationiscontraryinthenegativeyears.
简介:Becausethelargermetallicsurroundsareheatedbytheeddycurrent,whichisgeneratedbytheACcurrentflowingthroughtheACbusbarintheInternationalThermonuclearExperimentalReactor(ITER)poloidalfield(PF)convertersystem,shieldingoftheACbusbarisrequiredtodecreasethetemperatureriseofthesurroundstosatisfythedesignrequirement.ThreespecialtypesofACbusbarwithnaturalcooling,aircoolingandwatercoolingbusbarstructurehavebeenproposedandinvestigatedinthispaper.Foreachcoolingscheme,a3Dfinitemodelbasedontheproposedstructurehasbeendevelopedtoperformtheelectromagneticandthermalanalysistopredicttheiroperationbehavior.Comparingtheanalysisresultsofthethreedifferentcoolingpatterns,watercoolinghasmoreadvantagesthantheotherpatternsanditisselectedtobethethermaldissipationpatternfortheACbusbarofITERPFconverterunit.TheapproachtoqualifythesuitablecoolingschemeinthispapercanbeprovidedasareferenceonthethermaldissipationdesignofACbusbarintheconvertersystem.
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简介:在这个工作,SCSMEX数据被用来诊断并且比较本地陆地海热条件,与在1998的在夏季风的发作和开发上的西方的太平洋和西藏的高原的热强迫的可能的影响的讨论的焦点。结果显示出在热来源的分发之间的一种靠近的关系,陆地海形成对照。由于地面的堵住的效果,在有更多的明显的纵贯的陆地海对比的区域的热来源的主要最大的地区更显然是向南方的专门与海洋比那些定位了。加热的表面与在土地和海之间的明显的季节变异和差别被描绘。在西方的太平洋和夏季风的发作之间的关系在海面温度(SST)和潜伏的热的变化被反映。西藏的高原的影响机制在夏季风期间是不同的:它被在华南海季风期间的理智的加热并且由在印度季风期间的压缩潜伏的加热统治。
简介:Carboranebisphenolnovolacs(3and4)weresynthesizedinthepresenceofacidcatalystfromcarboranebisphenols(5and6)andformaldehyde.Furtherepoxidizationofcarboranebisphenolnovolacswithepichlorohydringavecarboranebisphenolepoxynovolacs(1and2).Themolecularweightandepoxyvalueofobtainedresinsweredeterminedusingthemolecularweightoftheirprecursors.Theepoxyvaluesof1and2were0.48and0.52respectively,higherthanthemaximumtheoreticalepoxyvalue(0.45)ofdifunctionalcarboranebisphenolepoxyresins.FTIRandNMRwereutilizedtocharacterize1and2.ThecuringbehaviorswerealsostudiedbyDSCandtheoptimizedcuringconditionswereobtained.TGAanalysisindicatedthatcarboranemoietycouldshielditsadjacentorganicstructuresagainstinitialdecomposition.Ontheotherhand,B―Honcarboranecagecouldreactwithoxygentoformathree-dimensionalnetworklinkedbyB―O―BandB―Cbonds,whichfurtherblockedthemovementofformedradicalsandthusthedegradationprocesswasinhibited.
简介:Inthis,phasecompsitionandthermalexpansionbehaviourofCaOStabilisedrefractorieswerestudied,Specialattentionwaspaidtotheexpasionbehaviourofthreematerialswithdifferentphasecomposition,TheresearchresultsindicatedthattheexpansionbehaviourcouldbeimprovedbymodifyingthestabilizationofZrO2,whichthusleadstotheincreaseinthethermalshockresistanceandpossiblyeroionresistaceofas-obtainedCaOstabilisedZrOmaterial.
简介:Thefailuremodeandadhesionofthermalbarriercoating(TBC)8YSZ(ZrO2+8%(w/w)Y2O3)depositedonNiCoCrAlTaYbondcoatbyatmosphericplasmasprayingwereinvestigated.Agroovedmodifiedthree-pointbendingspecimenthatcangenerateasingleinterfacecracktofacilitatethecontrolofcrackgrowthwasadoptedfortesting,whichwasconductedattheambienttemperatureof100°C.Themorphologyandcompositionoffracturedsurfaceswereexaminedbymeansofascanningelectronmicroscopy(SEM)andanenergydispersespectroscopy(EDS).ImagesandspectrumshowthatcracksareinitiatedandpropagatedexclusivelywithinYSZlayeradjacenttotop/bondcoatinterface.Theload-displacementcurvesobtainedexhibitsimilarshapesthatindicatetwodistinctstagesincrackinitiationandstablecrackgrowth.FiniteelementanalyseswereperformedtoextracttheadhesionstrengthoftheTBCs.Thedelaminationtoughnessoftheplasma-sprayed8YSZcoatingsat100°C,intermsofcriticalstrainenergyreleaserateGc,canbereliablyobtainedfromananalyticalsolution.
简介:OnFebruary16,theceremonytocelebratethebuilding-upofMeizhouwanThermalPowerPlantwassolemnlyheldattheplantconstructionsiteinPutianCounty,FujianProvince.Thisplantisafirstwhollyforeign-fundedone,approvedbytheStateDevelopmentPlanningCommission.ThetotalinvestmentinM
简介:Thermaltransportinahighlyporousmetallicwire-wovenbulkKagome(WBK)isnumericallyandanalyticallymodeled.Basedontopologysimilarityanduponintroducinganelongationparameterinthermaltortuosity,anidealizedKagomewithnon-twistedstrutsisemployed.SpecialfocusisplaceduponquantifyingtheeffectoftopologicalanisotropyofWBKuponitseffectiveconductivityItisdemonstratedthattheeffectiveconductivityreduceslinearlyastheporosityincreases,andtheextentofthereductionissignificantlydependentontheorientationofWBK.ThegoverningphysicalmechanismofanisotropicthermatransportinWBKisfoundtobetheanisotropicthermaltortuositycausedbytheintrinsicanisotropictopologyofWBK.
简介:动态、数字的方法被用来热强迫讨论大气的反应到SST。结果表演为行星的规模系统,热强迫能快速激动的站的SST稳定的大气的平衡状态回答,它被明显的大规模电视连接摆动在东方西方和南方北方方向描绘。为摘要的规模系统,SST热强迫主要使大气的低频率的摆动激动。在SST之间的某基本关系和动态过程热强迫和大气的反应模式被揭示,一些新观点被介绍。
简介:Heterogeneousprecipitationmethodwasusedtopreparedsurfacecoatingonself-madeBaMgAl10O17:Euphosphor.Resultsillustratethatthecoatingfilmcanbesilicondioxideinamorphousstatewith50nminthickness.Photoluminescenceresultsindicatethatthecoatinglayerpresentsanobservableimprovedeffectontheenhancementofthermalstability.Whenbakedat600℃for1h,theluminanceofcoatedBAMkeepsat92%higherthanthatofuncoatedBAMby23%.ThisprotectiveeffectcanbeattributedtothehighcompactdegreeanduniformityofthisamorphousSiO2coatingfilmwhichisservedasadiffusionblocklayertoinbreakoxygenatom,thusreleasestheoxidationextentofEu2+effectively.