建筑环境与能源应用工程专业英语15PPT推荐.ppt

建筑环境与能源应用工程专业英语15PPT推荐.ppt

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,ProvidesmultiplezonesofcomfortLifecyclecostwillbelessthanotherHVACSystemstryingtoaccomplishsimilarcomfortlevelsLoaddiversitySmallerequipment（lowerACunitfirstcostcomparedtoConstantVolume）Lesssupplyair（lessenergyconsumption）Abletoadapttochangesinbuildinguse,WhyNot?

HigherfirstcostthancomparablesinglezoneControls,equipment,commissioningIncreasedmaintenancecostMorepiecestolookafter,Constantvolume-variabletemperaturesystemhavebeendominatingtheHVACapplicationsinthepastforobviousreasons.Theimplementationofvariablevolumecontrolhasbeendonewithdampersorothermechanicalcontrolmethods.Theadvantagesofvariableairvolumesystemimplementedwithvariablespeedcontrolare:

FastcontroltokeepthecomfortzonelimitsLowconsumptionofelectricalenergyLowerconsumptionofheatingandcoolingenergythaninconstantairvolumesystemsSimplertokeepnoiseleveldown,1.Introduction2.Commissioningmethodstatement3.Systemcomponents4.Preliminarychecks5.Commissioningsequence6.Settingtowork7.Terminalunits8.Secondaryairdistribution9.Returnairspigots10.Systemdiversity11.Fandesignperformancecheck12.Systemperformancechecks,Frequentlyusedwordsandphrases:

Variableairvolume（VAV）system变风量系统commissioning试运行调试airvolumeflowrate空气体积流量terminalunit终端设备flexibleduct柔性风管Pitottube毕托管thermalanemometer热线风速仪supplyfan送风风机extractfan排风机over-pressurization压力过高spigot套管、栓、龙头,1.Variableairvolume（VAV）systemsaredynamicairdistributionsystemsand,astheirnameimplies,theairvolumeflowrateisvariedaccordingtovariousparameterstoachievetherequireddesignconditions.2.ThefactthatVAVsystemsaredesignedtovarysystemperformanceimposesanumberofspecifictasksonthecommissioningspecialist,whichmustbecarriedoutinordertoachievesatisfactoryoverallperformance.3.Proprietaryunitsmayemployavarietyofmeansofregulatingairvolumeflowrateincludingmotorizeddampers,inflatingbellows,restrictingflexibleductsectionsoracombinationofsuchdevices.,Variableairvolume（VAV）systems:

变风量系统dynamic:

动态的airvolumeflowrate:

空气体积流率designconditions:

设计条件,impose:

施加带来commissioningspecialist:

调试人员,proprietary:

私人拥有的inflatingbellows:

静压箱常用plenumchamberflexibleductsection:

柔性风管部件,plenumchamber静压箱acousticplenumchamber消声静压箱静压箱是送风系统减少动压、增加静压、稳定气流和减少气流振动的一种必要的配件，它可使送风效果更加理想。

静压箱的作用可以把部分动压变为静压使风吹得更远；

可以降低噪音风量均匀分配静压箱可用来减少噪声，又可获得均匀的静压出风，减少动压损失。

而且还有万能接头的作用。

把静压箱很好地应用到通风系统中，可提高通风系统的综合性能。

4.Controlsensorsmaymeasureairflowbymeansofpressuredifferential,Pitottube,flowgridorthermalanemometerusingspotoraveragingsensors.5.Theguidanceisnotsystem-specific,becausethedetailedtasksassociatedwithonesystemtypemaynotbethesameforanothertype.6.VAVsystemtechnologyofferssuchawiderangeofdesignoptionsandproprietarycomponentsthattheresultinginstallationsarelikelytorequiredifferentcommissioningtechniques.,pitottube:

毕托管flowgrid:

流动网格thermalanemometer:

热线风速仪,option:

选择选项,system-specific:

根据系统而特殊或不同的,7.Toensurethattheappropriatecommissioningproceduresareemployed,thecommissioningspecialistshouldcarefullyreviewtherecommendationsoftheequipmentsuppliers.8.VAVsystemstypicallycomprisethefollowingcomponents,someofwhichmayrequirespecialistcommissioningbythemanufacturerinadditiontogeneralcommissioningaspartofacompleteairdistributionsystem9.Aparticularcheckshouldbemadetoensurethatdistributionductworkinternalsarecleanthroughout.Ifthereisanydoubtregardingthestateofsystemcleanliness,thecommissioningspecialistshouldformallydrawattentiontothis.,review:

查阅复习equipmentsuppliers:

设备提供商,howtotranslate?

internal:

内部drawattentionto:

对注意,10.Withthesupplyandextractfansoperatingsimultaneously,therunningspeedshouldbeincreasedgradually.Motorrunningcurrentchecksshouldbemadeatvariousincrements,andtheresultsrecordedforeachfan,toassessperformanceandpreventoverloadingofthemotor.11.Thefansshouldthenbestoppedandmadesafesothatthecauseofthestaticpressureirregularitycanbeinvestigatedandrectifiedbytheappropriatepersonnelbeforeproceedingfurther.12.duringthecommissioningoftheindividualVAVterminals,itmaybenecessarytofurtherfine-tunethefanspeedtocompensateforanysystempressurevariations.,current:

电流increment:

增量overloading:

过载,irregularity:

无规律（的变化）rectify:

修正调整personnel:

人员proceed:

继续进行,terminal:

终端终点terminalstationfine-tune:

微调,13.Allproceduresandtechniquestobeappliedincheckingterminalunitvolumeflowratesshouldbeinaccordancewiththemanufacturersinstructionsandshouldbeincorporatedintothecommissioningmethodstatement.14.Verificationofthesearrangementsisnecessary,andthenumberofVAVterminalunitstobecheckedshouldbedefinedwithintheprojectcommissioningspecification.15.attheoutsetoftheVAVterminalchecks,thecommissioningspecialistshouldselectanumberofunitswithinletductconfigurationssuitableforin-ductflowmeasurementstobetaken.,instruction:

指示说明instructionbookspecificationincorporate:

合并结合incorporated:

组成公司的Inc.DELLInc.statement:

说明陈述,verification:

确认查证define:

详细说明,outset:

开始inletductconfiguration:

风管入口结构in-ductflow:

风管入口流动,16.Volumeflowratechecksbypitot-staticducttraverseshouldbeconductedontheseterminalstovalidatethemethodofflowratemeasurementadoptedwithinthecommissioningmethodstatement,17.Withsuchanarrangement,thecommissioningspecialistmustbalanceproportionallyeachofthesecondaryterminalsbythemethodsdetailedinsectionA3.2sothattheydischargethespecifiedproportionofthevolumeofairdeliveredbytheVAVterminal,withinthespecified（orappropriate）tolerances.18.Foralltheabovearrangements,regulationofthereturnairinletsmustbecarriedouttoachieveaproportionalbalancewithinthespecifiedtolerancelimits.,pitot-staticducttraverse:

风管横截面布置毕托管conduct:

进行,carryout:

执行,secondaryterminal:

二次终端设备tolerance:

公差允许的误差specified:

指定的,19.Itmaybenecessarytoimposeareducedairflowconditiononanumberofterminalstoac