约克变频离心机vsd

《约克变频离心机vsd》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、VariableSpeedDriveTechnologyYORKMILLENNIUMVSDCHILLERSFranciscanHospitalSEMIncorporatedOneValleyBankMarch11,1999Today’sTopicsHowchillersoperateHowVSDworksEnergycomparisonFeaturesandbenefitsHarmonicsApplicationExperienceEvaluatingchillerperformanceCentrifugalChillerC

2、entrifugalChillerOrificeSubcoolerCondenserDiffuserPlateImpellerFloodedEvaporatorPrerotationVanesMistEliminatorPressureEnthalpyPressure-EnthalpyChartEvaporatorCompressorCondenserMeteringDeviceRefrigerantrejectsheattoatmosphereRefrigerantabsorbsheatfromloadPressureEnt

3、halpyPressure-EnthalpyChart95°85°CoolingTower44°54°Lessthan1%ofchillerrunhoursareatdesignfull-load!HartfordWeatherHartfordWeatherHartfordWeatherHartfordWeatherHartfordWeatherHartfordWeather99.2%EvaporatorCompressorCondenserPressureEnthalpyHeadPressureHeadPressureEva

4、poratorCompressorCondenserPressureEnthalpyHeadPressureLoweringcondenserwatertemperatureEvaporatorCompressorCondenserPressureEnthalpyHeadPressureHeadPressureLoweringcondenserwatertemperatureLowersheadpressureEvaporatorCompressorCondenserPressureEnthalpyHeadPressureHe

5、adPressureLoweringcondenserwatertemperatureLowersheadpressureHeadPressureEvaporatorCompressorCondenserPressureEnthalpyHeadPressureLoweringcondenserwatertemperatureLowersheadpressureReducescompressorworkEvaporatorCompressorCondenserPressureEnthalpyHeadPressureHeadPre

6、ssureLoweringcondenserwatertemperatureLowersheadpressureReducescompressorworkReducesenergyconsumptionEvaporatorCompressorCondenserPressureEnthalpyHeadPressureHeadPressureFanLawsRPM~CFMRPM2~STATICHEADRPM3~HPRPMvsHP%RPM%HP100100907375425012Howdoweapplythistoachiller?V

7、ariableSpeedDrivesWhatisVariableSpeed?CarAnalogyPrerotationvanesElectricmotorConstantSpeedAcceleratorpeggedtothefloorConstantSpeedBraketoslowdownAcceleratorpeggedtothefloorConstantSpeedBraketoslowdownAcceleratorpeggedtothefloorConstantSpeedBraketoslowdownAccelerator

8、peggedtothefloorConstantSpeedBraketoslowdownAcceleratorpeggedtothefloorVariableSpeedFullcontrolofacceleratorBrakeonlyifnecessaryVariableSp