简介：Anairsourceheatpumpsystem(ASHPS)usedinanofficebuildingissetupandstudiedexperimentally.Itsoperatingperformanceinwinterisevaluatedbasedontestdataandacomparativediscussionisgivenontheeffectofclimateconditionsandheatingloadratioontheoperationbehavior.Thenheatingcapacityvariationcausedbyevaporatorfrostingisanalyzedaswell.Finally,thedefrostingparametersandthetechnicalfeasibilityarestudiedforaconstantheatingdemand.TheexperimentalresultsindicatethatboththeoutletwatertemperaturedropandthesystemCOPshouldbetakenintoaccountwhensettingdefrostingparameters,andASHPSisaviabletechnologyforspaceheatingandhot-waterproductioninwinterinTianjin,whichcanmaintaintheroomtemperatureabove19℃whentheoutdoortemperatureis-2℃.

简介：Thispaperpresentstheheatingperformanceandenergydistributionofasystemwiththecombinationofground-sourceheatpumpandsolarcollectororasolar-assistedground-sourceheatpumpsystem(SAGSHPS)bycalculationandexperiment.Theresultsshowthattheaverageabsoluteerrorislessthan0.6℃andtherelativeerrorislessthan5%underthepulseloadwhentheanalyticalsolutiontothe2-DsolidcylindricalsourcemodelisusedfortheSAGSHPS.Thecoefficientofperformance(COP)oftheSAGSHPSis2.95-4.70.Theaveragefluidtemperatureintheboreholeheatexchangercanincreaseby3℃withtheassistanceofsolarcollector,whichwillimprovetheCOPoftheheatpumpbyapproximately10%fromtheexperimentaldata.Theenergycontributionstothetotalheatingloadofsoil,electricityandsolarare56.30%,36.87%and6.83%,respectively.

简介：新致冷的混合BY-3的理论、试验性的分析基于一个singlestage蒸汽压缩制冷系统被进行。当低温度是20时，水水热泵系统使用了BY-3生产热水