填料塔设计英文文档格式.docx
- 文档编号:17205854
- 上传时间:2022-11-28
- 格式:DOCX
- 页数:9
- 大小:38.90KB
填料塔设计英文文档格式.docx
《填料塔设计英文文档格式.docx》由会员分享,可在线阅读,更多相关《填料塔设计英文文档格式.docx(9页珍藏版)》请在冰豆网上搜索。
Keywords:
LiquidDesiccantAirConditioningPackedtowerdehumidifierExperimentalstudy
PerformanceAnalysis
1Introduction
Liquiddesiccantairconditioningsystemwithclean,energy-saving,easyoperationandlow-gradeenergy,environmentalprotectionandgoodperformance,itissuitableforsolarenergyandindustrialwasteheatasrenewableheatsource,withgreatenergysavingpotentialandenvironmentaleffects[6].Manyexpertsandscholarsathomeandabroadforliquiddesiccantairconditioningforalargenumberofstudies.Inliquiddesiccantairconditioningsystem,thedehumidifieristhecorecomponentofthesystem,dehumidifierthestructureandpropertiesofadirectbearingonthemeritsofthesuccessorfailureoftheair-conditioningsystem.Howtodesignadehumidifier,dehumidifierenhancedheatandmasstransferintheprocess,reducetheflowresistanceistobeprocessed,suchasairthroughthedehumidificationprocessofair-conditioningrequiredtoachievethekey.
Thedesiccantdehumidifierisacomplexprocessofheatandmasstransferprocess.Itsbasicprinciples,isthedrivingforceofmasstransferofwatervaporinairpressureandmoistureabsorptionofthesaltsolutionthesurfaceofthewatervaporpressuredifference,whenthepartialpressureofwatervaportheairishigherthanthesurfaceofsaltsolutionofthewatervaporpressure,toachievewatersteamfromgastoliquidtransferprocess,gas-liquidtwo-phaselongenoughexposuretime,thetwo-phasemasstransferprocessofachievingthisbalance,themigrationofwatervaporintheairandgetoutofdrydesiccanttoabsorbmoistureanddilutedsolution.Afterabsorptionbythedilutesolutionafterheating,intotheregenerator,whenthesaltsolutionishigherthanthevaporpressureofwatervaportheairpressure,watervaporbegantotransferfromliquidtogas,toachievetheregenerationofthedesiccantsolution.Usuallydonothaveahighheatsourceheating,solarorindustrialwasteheatcanmakeuseof.Renewableafterre-sentbacktothestrongsolutionfordesiccantdehumidifiers,sothatthedehumidificationandregenerationoftheformationofacontinuouscycle.
2Principleanddevicetest
Packedtowerdehumidifierforresearch,includingtheoreticalresearchandexperimentalstudyoftwoaspects,firstofall,theoreticalstudiesbasedontheoreticalmodelingofenergybalanceandmassbalanceequationsforthedesiccantdehumidifierintheprocessoftheoreticalresearchandanalysis,theestablishmentofregulartypepackingofthepackedtowerdehumidifierheatandmasstransfermodeltostudytheprocessoftowerdesiccantdehumidificationperformanceofthevariousparametersonimpact.Packedtowerdehumidifierinthetheoreticalresearchthattherearemanyresearchresults,thispaperwillbere-PointsonthedesiccantairconditioningsysteminthepackedtowerdehumidifierExperimentalresearch,focusingontheprocessrevealsthedesiccantsolutionintheairandtheimportandexportoftemperature,humidity,flowratechangesinparameterssuchastheimpactofthedesiccantsystemandtheirroleinthelawtoexperimenttofindliquiddesiccantdehumidificationairconditioningsystemdesignparametersandthebestoperatingconditions.
2.1DataAcquisitionandProcessing
Experimentalstudyofliquiddesiccantintheprocess,theuseofcopper-constantanthermocoupletomeasureairandsolutiontemperature,airrelativehumidityandabsolutehumidity,measuredbythedryandwet-bulbtemperaturevalue,calculatedthroughthedevelopmentofcomputerprogramsbe;
theuseofY-BiTrustandmicro-pressureairflowratemeasured;
theuseofglassLZB-40rotameterwasataflowrateofsolution;
leastsquaremethodwiththesolutionconcentrationandthecorrespondingrelationshipbetweenthedensitybymeasuringthedensityofthesolution,findthecorrespondingsolutionconcentration.ParametervaluesthroughalloftheADAM-4018+-basedacquisitionmodulewiththeADAM-4520convertermoduletothemeasuredsignalanalog-digitalconversion,bytheRS-232serialtransmissiontothecomputerthroughthepreparationofdatacollectionproceduresforVBaccesstoreal-timedata.
3ExperimentalResultsandAnalysis
Theimpactofpackedtowerdesiccantdehumidifierperformanceofanumberoffactors,thisexperimentwastodeterminetheparametersofthetheoreticalresearchinstitutewithintheeffectiverangeof[2],forairandsolutiontemperature,flowrateandsolutionconcentrationontheimpactofdesiccant.Importsofselectedparametersofthedesiccanttoweris:
a.airimportwind:
thewindspeedrange1.0~3.0m/s,eachexperimentinordertospeed0.4m/sincrements;
b.solutionflow:
theflowchangesinthescopeof1.68~1.68×
5kg/m2•s,foreachexperimentto1.68kg/m2•sincrements;
c.importairdry-bulbtemperature:
airtemperaturerange26~42℃,foreachexperimenttocontroltheincreaseof2℃around;
d.airabsoluteimportsmoisturecontent:
thescopeoftheairabsolutemoisturecontent12~24g/kgDA,eachexperimenttocontroltheincreasing2g/kgDAaround;
e.solutiontemperature:
25~40℃intheframeworkofcontrolforeachexperimentinordertoincreaseabout1℃.Experimenttomaintaina~e,respectively,inacertainparameterincreasedfromlowtohigh,whiletheotherparametersremainunchanged.Adjusteachparameter,untilastablecondition,andthencollectandrecorddata,analysis,afterfinishingagroupofdehumidifierscometotheentranceoftheparametersoftheimpactofthevolumeofairdehumidificationcurves.
Figure2~Figure4describethestateoftheparametersonthesolutionofimportandexportparametersanddehumidificationofairvolumechange.Responsetodifferentconcentrationsofthesolution,thesolutionandtheairchangetheimportparameters,aswellastheirexportsdehumidificationefficiencyparameterchangesaffectthetrend.
3.1solutionflowofimportstoexportsofairmoisture,temperature,solutiontemperatureanddehumidificationefficiencyofexportoftheimpactof
amoisturecontentofairchangesinexportsbairoutlettemperature
csolutionoutlettemperaturechangesdchangesintheefficiencyofdDehumidifier
Figure2withtheparametersoftheexportstatusofthechangesintheflowofimportsofsolution
Figure2(a),(b)and(c)reflectthemoisturecontentofairexport,airandsolutionoutlettemperatureasthesolutiontoreducetheincreaseintraffic.Increasetheflowofsolutionbetweenthegas-liquidheatandmasstransfertomorefullycarriedout,butcomparedwiththeunitmassofsolutionflow,theliquidabsorbedbythesensibleheatandlatentheatarereduced,thustheimportexportsolutiontemperaturesolutionwiththeincreaseintrafficdownwardtrend.Thelowerthesolutiontemperature,solutionthesmallerthepartialpressureofwatervapor,thegreaterthedrivingforceofmasstransfer,masstransfercoefficientwillbehigher.Therefore,whenthesolutionflowofheatandmasstransferhavebeenstrengthened;
solutionflowinsmall,relativelysteepcurve,withtheincreaseofsolutionflow,thetrendtendstosmoothcurves.Showthatthereducedflowinthesolution,thewettabilityofthefillerisnotenoughtoincreasethesolutionflow,packedcolumnwettingrateofincreaseineffectiveareatoincreaseheatandmasstransfer,heatandmasstransfertoenhancerapid,withtheincreaseofsolutionflow,heatandmasstransferareahasbecomestable,heatandmasstransferprocessisstabilized,theperformancecurvestendtoflat.Figure2(a),(b)below,theairmoisturecontentwiththesolutionoftheexportflowsdownwardtrendintheincreaseoftemperatureandconcentrationbythesolutionoftheconstraints,thefinalvaporpressureandsolutionequilibriumexports;
andairtemperaturedecreasedthelevelofexportsWiththeincreaseofsolutiontendstoflowgently,whenthesolutionflowtoreach4×
1.68kg/m2•smore,theconcentrationofthesolutionhaslittleeffectcausedbythechange;
Figure2(c),(d)respondtothesolutionoutlettemperature,desiccantsolutionflowwiththechangesintheefficiencyoftheexperimentaldata,whenthesolutionflowtoreach3×
1.68kg/m2•smore,thesolutionoutlettemperatureanddehumidificationefficiencytendstoacertainvalue.
3.2volumeofimportsofairmoistureandairtothesolutionoftheimpactofexportparameters
Figure3describesthedry-bulbairtemperaturefor34℃,thesolutionflow5.04kg/m2•s,thesolutiontemperatureis30℃,thesolutionconcentrationof30%,35%,40%,thesolutionandairimportexportparameterswithairabsolutemoisturecontentchanges.
Figure3withtheparametersoftheexportstatusoftheairmoisturecontentchangeinimport
Figure3(a)and(b)showthattheimportsofairabsolutemoisturecontentchangesinairmoisturecontentontheexportofalmostnoeffect;
airandsolutionwiththeairoutlettemperatureoftheincreaseinimportswhileabsolutehumidityincreased,theexperime
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 填料塔设计 英文 填料 设计
![提示](https://static.bdocx.com/images/bang_tan.gif)