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1、外文文献翻译(含：英文原文及中文译文)文献出处：HShizu.HowAirConditionersenergyConservationTechnologyResearch[J].ElectronicTest,2013,1(5):31-41.英文原文HowAirConditionersenergyConservationTechnologyResearchHShizu1IntroductionEnergysavingcanbesaidtobethestartingpointanddestinationofbuildingautomationsystems.Itiswellknownthatth
2、eenergyconsumedbyanHVAC(heating,ventilation,andairconditioning)systeminanintelligentbuildingaccountsforalargeproportionofthetotalenergyconsumedbythebuilding,whichisroughlyaround50%to60%.Inparticular,freezerweaving,coolingtowers,circulatingwaterpumpsandair-conditioningunits,andnewairunitsarealllarge
3、energyconsumers.Therefore,itisnecessarytodevelopaneffectiveenergy-savingmethodforair-conditioningsystems,inparticulartoimprovetheautomationofexistingbuildingair-conditioningsystems.DDC(Dircctdigitalcontrol)directdigitalcontrolisacontroldevicethatiseasytoconstructandoperateeasily.Itcanbecontrolledby
4、theinterfacetosetupvariousloadchanges,suchasairconditioningcoldwatercirculationsystem,airconditioningboxautomaticvariableairvolumeadjustmentandcoolingtowers.Thefrequencyconversioncontrolofthecoolingfancanmaketheair-conditioningsystemoperatemoreefficiently.Thisnotonlybringsgreateconomicbenefitstothe
5、propertymanagement,butalsoenablesthesystemtooperateunderbetterconditionstoextendtheservicelifeoftheequipment.Andtoachieveacomfortableair-conditionedenvironmentandenergy-savingpurposes.Commonair-conditioningsystemsingeneralbuildingsincludeCAV,VAV,VWV,etc.Eachofthemhasdifferentcontrolmethodsandcanall
6、becontrolledbyDDC.(1)ConstantAirVolumeSystem(CAV)ConstantAirVolume(CAV)ConstantAirVolume(CAV)Theconstantairvolumesystemblowsoutacertainamountofairfortheairconditionertoprovidethecold(warm)airrequiredintheairconditioningarea.Whentheloadintheair-conditioningareachanges,theair-conditioningtemperaturei
7、schangedtocopewiththeindoorload,andtherequirementtomaintaintheindoortemperatureinthecomfortzoneisachieved.CommonlyusedcentralairconditioningsystemsareAHU(airconditioner)andcoldwaterpipesystem(FCUsystem).Bot
