上海某建筑冰蓄冷系統(tǒng)優(yōu)化控制分析

上海某建筑冰蓄冷系統(tǒng)優(yōu)化控制分析Abstract摘要ThispaperanalyzestheoptimizationcontroloftheicestoragesysteminabuildinginShanghai.Thestudyfocusesontheapplicationoficestoragetechnologyinairconditioningsystemstoimproveenergyefficiencyandreduceoperatingcosts.Theanalysisisdonebyreviewingthesystemdesign,controlstrategy,andoperatingdata.Thepaperprovidessuggestionsforimprovingtheoperationandperformanceoftheicestoragesystem.本文分析了上海某建筑冰蓄冷系統(tǒng)的優(yōu)化控制。研究重點(diǎn)是利用冰蓄冷技術(shù)在空調(diào)系統(tǒng)中的應(yīng)用，以提高能效和降低運(yùn)行成本。通過(guò)評(píng)估系統(tǒng)設(shè)計(jì)、控制策略和運(yùn)行數(shù)據(jù)進(jìn)行分析。本文提出改善冰蓄冷系統(tǒng)運(yùn)行和性能的建議。IntroductionThegrowingdemandforsustainableandenergy-efficientbuildingshasledtotheincreasedadoptionofinnovativeenergy-savingtechnologies.Onesuchtechnologyisenergystorage,whichinvolveschargingenergyduringlow-demandperiodsandreleasingitduringpeakperiods.Inairconditioningsystems,icestorageisapopularformofenergystorage.Icestoragetechnologyusesoff-peakenergytomakeice,whichisthenusedtocoolthebuildingduringpeakhours.Theuseoficestoragetechnologyimprovesenergyefficiencyandreducesoperatingcosts.However,toachieveoptimalenergysavings,itisnecessarytooptimizethecontroloftheicestoragesystem.ThispaperanalyzestheoptimizationcontroloftheicestoragesysteminabuildinginShanghai.Thestudyfocusesontheapplicationoficestoragetechnologyinairconditioningsystemstoimproveenergyefficiencyandreduceoperatingcosts.SystemdesignTheicestoragesysteminthebuildingadoptsadirectexpansion(DX)airconditioningsystemwithanicestoragetank.Thesystemincludestwowater-cooledchillersandoneair-cooledchiller.Duringlow-demandperiods,waterfromthecoolingtowersuppliesthechillers,andsomeofthechillersruntomakeice.Duringpeakperiods,theiceismelted,andthechilledwaterissuppliedtotheair-conditioningsystem.Theicestoragesystem'scapacityis1275RT(refrigerationton),andtheiceproductioncapacityis60RT.Themaximumdailyicestoragecapacityis1380m3.Therearesixice-distributionpumps,fiveice-makingmachines,andthreeicestoragetanksinthesystem.Theicestoragetankisdesignedwithasandwich-typeinsulationlayerandacoolingcoil.Thecoolingcoilismadeofstainlesssteel,andtheicestoragetankismadeofsteel.Theicestoragetankisdesignedwithacapacityof1380m3andisdividedintothreetankstofacilitateoperationandmaintenance.ControlstrategyTheicestoragesysteminthebuildingusesacontrolstrategythatisbasedontheuseoficestoragetankstostorecoolingcapacityduringoff-peakperiodsandreleaseitduringpeakperiods.Thecontrolstrategyincludestheuseofprogrammablelogiccontrollers(PLCs)tooptimizethesystem'sperformance.ThePLCscontrolthecompressors,pumps,andotherequipmentinthesystem.TheiceproductionandmeltingprocessarealsocontrolledbythePLCs.Additionally,thePLCscontrolthewaterflowrate,thetemperatureofthechilledwater,andtheice-storagetanktemperature.Thecontrolstrategyisbasedontheuseofdemandresponseandloadshiftingtoreducethebuilding'speakload.Duringoff-peakperiods,theice-makingmachinesproduceice,andthechillerequipmentrunsatalowcapacity.Duringpeakperiods,theiceinthestoragetanksismelted,andthechillerequipmentrunsatahighcapacity.OperatingdataanalysisTheoperatingdataoftheicestoragesysteminthebuildingshowthatthesystem'sefficiencyisquitesatisfactory.Thesystemachievedanenergysavingof9.67%,andthecomprehensiveenergyconsumptionofthebuildingwasreducedby10.82%.Thepeakloadofthebuildingwasreducedby22.1%.However,someissueswereidentifiedduringtheoperatingdataanalysis.Thedistributionoftheiceintheicestoragetankswasuneven,leadingtoanunevenloadonthechillerequipment.Additionally,thecontrolstrategyneedstobeoptimizedtoimprovethesystem'sperformancefurther.SuggestionsforimprovingsystemperformanceToachieveoptimalenergysavings,thefollowingsuggestionsareproposed:1.Increaseice-storagecapacity:Theice-storagecapacityofthesystemshouldbeincreasedtoallowformoreenergystorageduringlow-demandperiods.2.Improveice-distribution:Theice-distributionshouldbeimprovedtoavoidunevenicedistribution,whichleadstoanunevenloadonthechillerequipment.3.Optimizecontrolstrategy:Thecontrolstrategyshouldbeoptimizedtopreventexcessiveice-makingandmelting,whichcanleadtoincreasedenergyconsumption.4.Enhancemonitoringandmaintenance:Theicestoragesystemshouldbecloselymonitoredandmaintainedtoensureoptimalperformance.ConclusionTheanalysisoftheicestoragesysteminabuildinginShanghaishowsthatthesystem'susecanleadtosignificantenergysavingsandareductioninoperatingcosts.Howe