Experimental data and model for heat transfer

《Experimental data and model for heat transfer》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、InternationalJournalofHeatandMassTransfer47(2004)3565–3572www.elsevier.com/locate/ijhmtExperimentaldataandmodelforheattransfer,inliquidfallingfilmflowonshell-side,forspiral-woundLNGheatexchangera,*abBengtO.Neeraas,ArneO.Fredheim,BjørnAunanaStatoilResearchCenter,7005Trondheim,Norwa

2、ybPGSProductionAS,7405Trondheim,NorwayReceived15February2002;receivedinrevisedform4December2003Availableonline19March2004AbstractAtestplanthasbeenconstructedformeasurementsoflocalheat-transfercoefficientsandfrictionalpressuredropsontheshell-sideofspiral-woundLNGheatexchangers.Meas

3、urementshavebeenperformedwithsingle-phasevaporflow,liquidfilmflowandtwo-phaseshearflow.Thispaperfocusesonthemeasurementsandtheresultsfromtheliquidfallingfilmflowexperiments.Onehundredandseventy-oneliquidfallingfilmheat-transfermeasurementshavebeenperformedatafilmRe-numberrangeof500–8000

4、withethane,propane,methane/ethanemixture,ethane/propanemixturesandethane/n-butanemixtureastestfluids.Ó2004ElsevierLtd.Allrightsreserved.Keywords:Experimental;Film;Heattransfer;LNG1.Introductionneeded.Inaspiral-woundheatexchangerusedforLNGproductiontherefrigerantevaporatesontheshe

5、ll-sideinThemostimportantheat-transferequipmentinbase-downwardflow.Thestreamsonthetube-sidearecon-loadLNGplantsisthemaincryogenicheatexchangerdensingorsingle-phasenaturalgasandrefrigerant.Twoforcooling,condensationandliquefactionofthenaturaldifferenttestplantshavebeenconstructedfo

6、rthepur-gas.Themulti-streamspiral-woundtypeisthemostposeofmeasuringheat-transfercoefficientsandpressurecommonlyusedheatexchangerforthisapplication.drop,bothforshell-sideevaporationandtube-sideInformationregardingheattransferandpressuredropcondensation.Basedonthemeasurementsmodelsh

7、avemodelsforspiral-woundheatexchangersisproprietarybeenselectedordeveloped.informationfortheveryfewmanufacturersofsuchAprinciplesketchofamulti-streamspiral-woundunits.Tobeabletoperformdesignandratingcalcula-heatexchangerisdepictedinFig.1[1].tionsandsteady-stateanddynamicprocesss

8、imulationThedifferenttubesarecoiledinlayersaroun