冷却塔辅助冷却地源热泵系统的研究-土木工程专业毕业论文

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1、AbstractSoilsourceheatpumpsystemhasbeenwidelyappliedduetoitsadvantagesofhighefficiencyandenergysaving．Butitstillexistsproblemssuchasgeographiclimitationsandeconomyduringtheuseofthissystem．Thereisasummerheatthanwinterheatproblemingroundsourceheatpumpsysteminpredominant

2、lysummerairconditioningarea．Thereexistsaproblemthattheheattakenfromthesoilinwinterisgreaterthantheheatinsummerincoldregion．Thesoiltoexothermicimbalancewillleadthesoiltemperatureofthissystemsignificantlytodeviatefromtheinitialtemperatureafterlong—termrunning．Andtheeffi

3、ciencyofthesystemwilldropafteralong—termrunning．Theundergroundthermalbalanceproblemisanurgentproblemforthesoilsourceheatpumpsystem．Itisgoodtokeeptheheatbalancetousecoolingtowerauxiliarygroundsourceheatpumpsystem．Ithasaimportantsignificancetoresearchtheoperationstrateg

4、yofthecoolingtowertoimprovethesystemefficiencyandkeepthermalbalanceadjustment．Basedonthecylindricalsourcemodelofundergroundsoil，theheattransferbetweenburiedpipeandsoilwassimulatedinthispaper．Andtheresultswereverifiedaccordingtotheexperimentalplatformofsimulation．Thena

5、long-termoperationcouldbesimulatedinthissystem．Andwecanstudytheoperationofthegroundsourceheatpumptotheinfluenceoftheundergroundthermalbalanceandthethermalrecoveryabilityofthesoil．Accordingtothesimulationresults，itcanleadtothephenomenonofundergroundheataccumulationforl

6、ong—termrunningsoilsourceheatpumpsystem．Thetemperatureofthesoilhasarecoverytrendinthetransitionperiod．Inordertoadjusttheundergroundthermalbalance，wecanonlyrunthecoolingtowerintheeralyandlateofthecoolingseason．Ontheotherhand，wecancascadethecoolingtowerandtheburiedtubeh

7、eatexchangerdirectlyinthetransitionseason．Fourkindsofoperationstrategyofthehybridsystemwerestudiedinthispaper．Theresultsshowthatrunningthehybridsystemonthebasisofthetemperaturedifferencebetweentheexportofburiedpipeheatexchangerlocalfluidwetbulbtemperatureisthebestoper

8、ationstrategyinWuhan．II万方数据Keywords：Groundsourceheatpump；simulation；experiment；undergroundheatbalance；thecoolingtowerllI万方数据