Simulation and Analysis of the Heat Pump System with Flash-Tank Coupled with Scroll Compressor

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1、融The4”InternationalConferenceof]SustainableEnergyTechnotogiesJinan．China．23—25September2005SimulationandAnalysisoftheHeatPumpSystemwithFlash-TankCoupledwithScrollCompressorLihuaYu，HuixiaZhao，GuoyuanMaCollegeofEnvironmentalandEnergyEngineering，BeijingUni

2、versityofTechnology，Beijing，ChinaAbstract：Theheatpumpsystemwithflash—tankcoupledwithscrollcompressorhasgoodperformances。especiallyundertheconditionsoflowambienttemperature．byimprovingjtaJnterneJcompressionprocess．ThecorrelationofelectricefficiencyIsfitt

3、edbyIeastsquaremethodbased0ntheexperimentaldataoftheheatpumpprototypeinwhichR22isusedasrefrigerantAccordingtothecorrelation，theperformancesoftheheatpumpsystemhavebeensimulatedandanalyzedundertheconditionsofthecondensationtemperature仃0m30℃to50℃andtheevap

4、orationtemperaturefrom—30℃tO0℃Theresultsdemonatrateasfollows：theheatingcoefficientofperformanceoftheheatpumpsystemis187．thedischargetemperatureofthecompressorIslessthan130℃thepowerfnputis444kW,andtheheatingcapacityfs828kW,whenthesystemwitha5Hpscrolfcomp

5、ressorworkedlntheconditionofthecondensationtemperatureof45℃andtheevaporationtemperatureof—25℃SotheheatpumpsystemwithhighefficiencywilIbeanIdealalternativemethodforbuildingheating"1coldregionssuchasnorthChinaandYellow只iverbasin，Keywords：heatpump，scrollco

6、mpressor，performancesimulationNOMENCL^lTURESymbolDescription【UnitsIPkCondensationPressurefkWlPmMediaIPressure【kW]PoEvaporationPressureIkW]TkCondensationTemperature【℃】ToEvaporationTemperature【℃】TdDischargeTemperature【℃]QhHeatingCapacity【℃】WPowerInput『kW]

7、1．INTRODUCTIONForalonglime．air-sourceheatpumpsystemisappliedwidelyietheregionssuchasmiddleand10werreachesoftheChangjiangRiver．southwestandsouthChina．ItcansatisfyheatingandairconditioningrequlrementsofmeseregionscommendablybecauseItsenergyconsumptionandi

8、nitiaIlnvestmentarelowerItcanbeused1nbothsummerandwinterexpedientlyandhasnopollutionBuIfortheregionssuchasYellowRiverdrainageareaandnorthChina，thearabiaottemperatureIsfowerandheatingpedodisfongerinwinte5soconventionaIair—sourcehe