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1、EnergyandBuildings39(2007)328–334www.elsevier.com/locate/enbuildThree-yearsoperationexperienceofagroundsourceheatpumpsysteminNorthernGreeceA.Michopoulos,D.Bozis,P.Kikidis,K.Papakostas,N.A.Kyriakis*ProcessEquipmentDesignLaboratory,DepartmentofMechanicalEngineering,Aristotle
2、UniversityofThessaloniki,P.O.Box487,54124Thessaloniki,GreeceReceived16May2006;receivedinrevisedform1August2006;accepted4August2006AbstractThepaperpresentsthebasicparametersandtheenergyflowsofagroundsourceheatpumpsystem(GSHP)usedforairconditioningtheNew2CityHallofPylaia(Thes
3、salonikiarea—NorthernGreece).Thebuildingisatypicalpublicone,withanair-conditionedareaof1350m.ThegroundsourceheatpumpinstallationisthelargestinGreece,anditsoperationismonitoredwiththeaidofaDAQsystem.TheenergyflowspresentedinthepaperarebasedonDAQrecordingsofthefirst3yearsofsys
4、tem’soperation.Itisprovedthattheenergydemandofthesystemissignificantlylower,comparedtothatofconventionalheatingandcoolingsystems.TheseasonalCOPofthesystemhasnotyetbeenstabilized,graduallyincreasing,asitisexpectedduetotheoperationofthegroundheatexchanger.#2006ElsevierB.V.All
5、rightsreserved.Keywords:Groundsourceheatpumpsystem(GSHP);Energydemand;Heatingloads;Coolingloads1.Introductiontheprimarycircuitoftheheatpumpwithafluidofamoreorlessconstanttemperature.HeatpumpsarecharacterizedbythestrongdependencyofAnumberofgroundheatexchangerconcepts(vertica
6、l,theircoefficientofperformance(COP)onprimarycircuithorizontal,ofinseriesorinparallelconnection,etc.)havebeentemperature.Consequently,‘‘pumping’’heatfromaverylowdeveloped,featuringdifferentdegreesoffluidtemperature(e.g.aroundfreezingorbelow)temperatureheatreservoirorstabilit
7、y[2–4].rejectingheattoahightemperature(408Corhigher)heatInthiswork,averticalgroundheatexchangerofparallelreservoirmakethesysteminefficientintermsofprimaryconnectioncoupledtoaheatpumpsystemforairconditioningaenergy(electricity)demand.Thischaracteristicimpliesthatthepublicbui
8、ldinginnorthernGreeceispresentedwithenergyambientair,dependingonclimateconditions,maynotb
