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ID:42748406
大小:35.50 KB
页数:4页
时间:2019-09-21
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1、重庆邮电大学移通学院专科毕业设计BuildingAutomationSystems–HVACControl21July2008Aset-upinamulti-storyautomatedbuildingwouldhavemanybuildingautomationcontrollersservingdifferenttypesofairconditioningandheatingequipment(BASisnotlimitedtojustHVACapplications).Everybuildingisdifferentanditisimp
2、ortantfortheBASengineertoselecttheproperBASHVACcontrolsystemandprogramstocontrolthevarioustypesofHVACsystemsinaparticularautomatedbuilding.Forbuildingautomationsystemstobeeffective,itisimportantthattheBASsystemisinstalledandtunedproperly.SomeadvantagesofagoodHVACBASbuilding
3、automationsystemare:·BuildingAutomationSystem(BAS)shouldallowtheownertosetupschedulesofoperationfortheequipmentandlightingsystemssothatenergysavingscanberealizedwhenthebuildingorspacesinthebuildingareunoccupied.·BuildingAutomationSystem(BAS)shouldallowtheequipmentoptimalsta
4、rtwithadaptivelearning.Optimalstartisallowingtheequipmenttobebroughtoninanorderedandsequentialmannerautomaticallyonaschedulebeforethebuildingisreoccupiedsothatspacesetpointscanberealizedbeforeoccupation.Adaptivelearningallowsthesystemtocomparespacetemperature,outsideaircond
5、itions,andequipmentcapabilitiessothattheequipmentcanbeturnedonatanappropriatetimetoensurespacesetpointsareachievedbeforeoccupation.·BuildingAutomationSystem(BAS)shouldhavetrimandrespondcapabilities.Basedonzonedemandthesetpointforvariousheatingandcoolingsourceswillchangeacco
6、rdingtodemandfromthezones.InaVAVsystemalltheVAVboxesareservedfromacentralairhandlingunit.Ifallthezonesareatsetpointthenthesupplyairtemperaturesetpointoftheairhandlerisautomaticallychangedtopreventmechanicalcoolingfromoccurringwhenitisunnecessary.Whenthezonesgrowwarmerthesup
7、plyairtemperaturesetpointisautomaticallyloweredtoallowmechanicalcoolingtosatisfydemand.Oldersystemshaveasinglesupplyairtemperaturesetpointof55°Fahrenheitwhichrequiresthecompressorstocycleevenwhenitisnotnecessary.·BuildingAutomationSystem(BAS)shouldhavetheabilitytomonitorene
8、rgyusageincludingtheabilitytometerelectric,gas,water,steam,hotwater,chilledwater,a
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