外文翻译中央空调监控系统中温湿度控制的相关问题分析.docx
- 文档编号:12918307
- 上传时间:2023-04-22
- 格式:DOCX
- 页数:11
- 大小:24.42KB
外文翻译中央空调监控系统中温湿度控制的相关问题分析.docx
《外文翻译中央空调监控系统中温湿度控制的相关问题分析.docx》由会员分享,可在线阅读,更多相关《外文翻译中央空调监控系统中温湿度控制的相关问题分析.docx(11页珍藏版)》请在冰豆网上搜索。
外文翻译中央空调监控系统中温湿度控制的相关问题分析
附 录
附录A 外文翻译
TheAnalysisonRelatedProblemsofTemperaure-humidityControlforMonitoringSystemofCentralAir-condition
1Introduction
"Greenbuilding"focusonenvironmentalprotection,energysaving,efficientuseofresourcesandmaterials,especiallyfocusonrequirementsforairtemperature,humidity,ventilationandcleanliness.Therefore,theuseofairconditioningsystemismorewidely.Air-conditioningcontrolsysteminvolvesmanyaspects,butmorecomplextaskstobeachieved.Itneedssupportofcoldandheat.Therearehigh-powerairconditioningunitfan,butit'sagreatenergy.Underthepremiseofmeetingtherequirementsofuserstoairenvironment,onlytheuseofadvancedcontrolstrategiestocontrolair-conditioningsystem,canachieveenergyconservationandreducecostofoperation.Thefollowingwillmakeabriefdiscussionaboutperspectiveproblemswiththemonitoringsystemfromcontrolstrategy.
2system'sbasicstructureandworkingprinciple
Structureandcompositionofair-conditioningsystemgenerallyincludethesections:
(1)PartofthenewwindAir-conditioningsystemduringoperationtocapturepartoftheoutdoorfreshair(iefreshair),thispartofthefreshairtomeetindoorstaffrequiredminimumfreshairvolume,soairconditioningsystemoffreshairtakenintotheamountdeterminedbyair-conditioningsystemserviceusesandhygienerequirements.Thenewwindintothegeneralpopulationinthesurroundingareasfrompollution.ThesenewwindintoportandairconditioningsystemsandnewairductsinstallationofnewwindDust(newstyleairfilter),newairheaters(alsoknownasair-conditioningsysteminaheater)cametogethertoformanewairsystemairconditioningsystem.
(2)PartofairpurificationAir-conditioningsystemaccordingtotheirdifferentuses,purificationofairindifferentways.Therefore,intheairpurificationsystemhassetaninitialeffectofasimpleairfiltercleaningsystem,butalsosetaninitialeffectiveairfilterandairfilterefficiencylevelofthegeneralpurificationsystem,inadditiontosettinganinitialefficiencyairfilters,oneintheefficiencyofairfiltersandaHEPAfilterforthreehigh-purificationsystemfilter.
(3)Partoftheairheat,wetAirheating,humidificationandcooling,dehumidification,willcombinetheprocess,knownastheairconditioningsystem,heat,wetpart.Intheairtoheat,wetprocessing,surface-airheatexchanger.Settinganewairintakesinthesystem,areturnairastheairbeforetheairheaterinaheater;setbeforecoolingdehumidificationairheater,knownasthesecondaryairheater;setinair-conditionedroombeforesendingoutletairheater,knownasthethreeairheaters.Threeair-conditionedroomheatertoregulatethemainroleofthetemperature,thethermalcoalusedforthehotwaterorelectricheating.Thesurfaceheatexchangerincoldwaterorarefrigerantthroughthelow-temperaturewater-cooledsurface,calledthedirectevaporativecoolerorcoolersurface,butalsobysprayingcoldwaterorhotwaterwasher,Therearealsodirectwatersprayofsteamapproachtoachievetheairhotandwetprocessing.
(4)ThesectionofairtransportationanddistributionandcontrolFansandairconditioningsystemstosend,returnairpipeaspartofairtransport.Ductintheregulationofairvalve,butterflyvalve,damper,bootvalveandairoutletsuchaspoints,controlsection.Air-conditioningsystemaccordingtothedifferentairresistance,setthenumberoffansaredifferent,iftheairconditioningsystemforawindturbineset,thefansnotonlyfromtheairrole,therolewasunderwayasasinglereturnairfansystem;iftheairconditioningsystemsettwofans,onefortheblower,anotherfanfortheback,thencalledthetwo-fansystem.
(5).coldandheatsourceofairconditioningsystem,Airconditioningsystemsusedinthecoldcoldsourceisgenerallydividedintonaturalandartificialsourcesofcoldsource.Naturalcoolingsourcegenerallyreferstogroundwaterfromdeepwells,artificialcoldsourcegenerallyreferstotheuseofartificialrefrigerationmeansavailable,whichincludesthevaporcompressionrefrigeration,absorptionrefrigeration,andsteamjetrefrigeration,andothermeans.Modernlarge-scalebuildingsareoftenusedforcentralairconditioningsystem
Itsworkingprincipleiswhentheambienttemperatureistoohigh,theairconditioningsystem,throughre-circulatedtotheindoorheatawaysothattheindoortemperatureismaintainedatacertainvalue.Whenthecirculationofairthroughthefancoil,thehigh-temperatureairthroughthecoolingcoilofaluminummetalpriortoheatexchangecoilofaluminumabsorbsheatfromtheair,theairtemperaturedecreases,andthenthecycleoffreezingairgivenawayafterIndoor.Chilledwatercoolingcoilprovidedbythecoolingmachine,coolerbythecompressor,condenserandevaporatorcomponent.Compressortocompressrefrigerant,refrigerantcompressedintothecondenser,cooledbycoolingwaterintotheliquid,precipitationheatfromthecoolingwater,anddrainedthecoolingtowerair.Liquidrefrigerantfromthecondenserintotheevaporator,evaporation,sothatchilledwatercooling,andthenintothewater-cooledchilledwaterfancoilheatabsorptionintheair,againandagain,cyclecontinuously,theindoorheataway.Whentheambienttemperatureistoolow,theneedforhotwaterintothefancoil,andtheabove-mentionedprinciples,asgivenawayheatedindoorair.Afteraircooling,wateranalysisoftheairrelativehumiditydecreased,becomedry,soneedtoincreasehumidity,itisnecessarytoinstallhumidifiers,watersprayorspraytosteamairhumidificationtreatment,theuseofsuchwetairtosupplementinadequateamountofindoorwatervapor.
3.centralairconditioningsystemcontrolproblems
3.1Thecharacteristicsofthecontrolledobject
Air-conditioningsystemcontrolobjectsaremostlythermalobjects,fromtheperspectiveofcontrol,hasthefollowingcharacteristics:
(1)moredisruptiveForexample,incomingsolarradiationthroughwindows,heatisafunctionoftime,subjecttoweatherconditions;outdoorairtemperature,roomtemperaturethroughtheenvelopeonimpact;throughdoors,windows,buildingcrackspenetratedtheoutdoorairtemperatureimpact;tochangegas(ormaintainacertainpositivepressureroom)adoptedanewstyle,itstemperaturechangeshaveadirectimpactontheroomtemperature.Inaddition,theelectricheater(airheater)powersupplyvoltagefluctuationsandhotwaterheaterhotwaterpressure,temperature,steampressurefluctuations,willaffecttheroomtemperature.
Somuchinterference,sothatairconditioningloadinthelargercontextofchange,andtheirlocationintothesystem,form,sizeandfrequencyofsuchmagnitude,bothwiththeconstructionofthestructure(buildingthermalperformance),useofdifferentanddifferent,evenwithairconditioningtechnologyitself.Shouldbeconsideredinthedesignofairconditioningsystemstominimizeinterferencewithortakinganti-jammingmeasures.Therefore,wecansaythatairconditioningprojectisbasedonbuildingthermal,air-conditioningtechnologyandautomationtechnologybasedonacomprehensiveengineering.
(2)Multi-conditionAirconditioningtechnologyinthetreatmentprocessishighlyseasonal.Year,atleastintothewinterseasonandsummertransition.Inrecentyears,distributedsystemsintheairconditioningsystem,airconditioningformultipleapplicationstocreateconditionsfavorableconditions.Astheairconditioningsystem,diversification,operationalmanagementandcontroldevicestobecomecomplicated.Thereforerequireoperatorstobeinstrictaccordancewiththeenergy-efficientdesignrequirements,includingtechnicalmeasurestooperate,andmaintain,notfreetochangerunChengXu,andZhong'sShebeiChaigaisystem.
(3)temperature,humiditycorrelationDescribethestateofthetwomainparametersofairtemperatureandhumidityastheyarenotcompletelyindependentofthetwovariables.Whentherelativehumiditychangeswillcausehumidification(ordehumidification)action,theresultswillleadtotemperaturefluctuations;andtemperaturechanges,soindoorairvaporsaturationpressure,theabsolutemoisturecontentinthesamesituation,directlychangetherelativehumidity(relativehumiditytoreducethetemperatureincreased,thetemperatureincreasereducesrelativehumidity).Associatedwiththeparameterssuchasrelativeparameters.Clearly,inthetemperatureandhumidityoftheair-conditioningsystemsrequiredtoformtheautomaticcontrolsystemshouldpayattentiontothisfeature.
3.2ControlProblems
Suchascentralairconditioningsystemforlarge,complexprocess(orobject)ofthecontrolimplementation,usuallybysomekindofguidelines,theloweritsdecompositionintoanumberofsubsystemstoexercisecontrol,co-ordinationinthetopperformanceamongthevarioussubsystems,makingintegrationAfterthesystemisinsomesensetheoptimalstate.Problemsincontrolmainlyin:
(1)uncertaintyTraditional
(2)highlynonlinear
(3)semi-structuredandunstructured
(4)systemcomplexity
(5)Reliability
4.theselectionofcontrolstrategy
Theuncertaintyofcomplexsystems,sincethecontrolledobject(process)isdifficulttousethecharacteristicsofthemathematicalmodelaccuratelydescribed.ThetraditionalPIDcontroltheorybasedonclassicalcontrolandstatespacerepresentationbasedonmoderncontroltheorymethodstoachievehighdynamicandstaticchargedobjectqualitycontrolisverydifficult,usuallywithblack-boxmethod,thatmethodofinputandoutputdescriptioncontrolsy
- 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:
- 外文 翻译 中央空调 监控 系统 温湿度 控制 相关 问题 分析