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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,DepartmentofMechanicalEngine
2、ering,AristotleUniversityofThessaloniki,P.O.Box487,54124Thessaloniki,GreeceReceived16May2006;receivedinrevisedform1August2006;accepted4August2006AbstractThepaperpresentsthebasicparametersandtheenergyflowsofagroundsourceheatpumpsystem(GSHP)usedforairconditioni
3、ngtheNew2CityHallofPylaia(Thessalonikiarea—NorthernGreece).Thebuildingisatypicalpublicone,withanair-conditionedareaof1350m.ThegroundsourceheatpumpinstallationisthelargestinGreece,anditsoperationismonitoredwiththeaidofaDAQsystem.Theenergyflowspresentedinthepap
4、erarebasedonDAQrecordingsofthefirst3yearsofsystem’soperation.Itisprovedthattheenergydemandofthesystemissignificantlylower,comparedtothatofconventionalheatingandcoolingsystems.TheseasonalCOPofthesystemhasnotyetbeenstabilized,graduallyincreasing,asitisexpecteddu
5、etotheoperationofthegroundheatexchanger.#2006ElsevierB.V.Allrightsreserved.Keywords:Groundsourceheatpumpsystem(GSHP);Energydemand;Heatingloads;Coolingloads1.Introductiontheprimarycircuitoftheheatpumpwithafluidofamoreorlessconstanttemperature.Heatpumpsarechara
6、cterizedbythestrongdependencyofAnumberofgroundheatexchangerconcepts(vertical,theircoefficientofperformance(COP)onprimarycircuithorizontal,ofinseriesorinparallelconnection,etc.)havebeentemperature.Consequently,‘‘pumping’’heatfromaverylowdeveloped,featuringdiff
7、erentdegreesoffluidtemperature(e.g.aroundfreezingorbelow)temperatureheatreservoirorstability[2–4].rejectingheattoahightemperature(408Corhigher)heatInthiswork,averticalgroundheatexchangerofparallelreservoirmakethesysteminefficientintermsofprimaryconnectioncoupl
8、edtoaheatpumpsystemforairconditioningaenergy(electricity)demand.ThischaracteristicimpliesthatthepublicbuildinginnorthernGreeceispresentedwithenergyambientair,dependingonclimateconditions,maynotb
