溴化鋰納米流體高溫條件下對(duì)流換熱特性的實(shí)驗(yàn)研究.pdf

1、北京建筑工程學(xué)院碩士學(xué)位論文溴化鋰納米流體高溫條件下對(duì)流換熱特性的實(shí)驗(yàn)研究姓名：武威申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：供熱、供燃?xì)?、通風(fēng)及空調(diào)工程指導(dǎo)教師：解國(guó)珍20100301EXPERIMENTALSTUDYONCoNVECTIVEHEATTRANSFERPROPERTIESoFNANOFLUIDSoFLITHIUMBRoMIDEAQUEOUSSOLUTIONATHIGHTEMPERATUREAbstractNanomaterialscien

2、ceisanewmaterialsscienceandtechnologyinrecentyearsWiththerapiddevelopmentofnanotechnologyandtheconstantupgradingoftraditionalindustries，nano—materialtechnologyappliedtotraditionalareasofproductionandfullaccesstoindustria

3、lizationhasbecomepossible，insomeareasarealreadyvisibleNanofluidasanewtypeofheattransferworkingfluid，theheattransfereffectsignificantlyenhancedinmanyareasofresearchhasbeenconfirmedthatthesearefortheintroductionofthenano—l

4、ithiumbromideabsorptionrefrigerationfluidprovidesthepossibilityInthispaperthelithiumbromidenanofluidsofdifferentnano—particleconcentrationanddispersantratiowouldbeanalyzedwithdifferentialscanningcalorimetrywhichverifiedt

5、heoperationreliabilityofnanofluidsintheoperatingtemperaturerangeoflithiumbromideabsorptionchillers。Theexperimentsofconvectionheattransferweremadeonthedifferentnanoparticleconcentrationanddispersantconcentrationoflithiumb

6、romidenanofluidlevelsathightemperatureoperatingconditions。ThecontrastofthermalperformancebetweennamofluidexperimentalresultsandLiBrsolution謝th58％concentrationwasanalyzedInaddition，therelationshipbetweendensity，viscosityc

7、onstantpressurespecificheatandotherthermalpropertiesoflithiumbromidenanofluidwithtemperature，aswellastherelationshipofthesurfaceconvectionheattransfercoefficient，NusseltnumberReynoldsnumberwithmeanvelocityoftheLiBrnamofl

8、uidwereanalyzedanddemonstratedthroughtestdataThroughtheexperimentalanalysisitCallbegottenthatthephasetransitiontemperatureofthedispersantusedintoLiBrnanofluidsishigherthanthehighesttemperatureofconvectionheattransferexpe