BUILDINGTECHNOLOGIESPROGRAMFebruary6,2014ASRACPumpsWorkingGroupMetricConstructDetails2MetricApplicabilitytoPumpConfigurationsPumpConfigurationBare Pump BarePump+Motor BarePump+Motor+Controls

Metric CoverageBarePumpDoesnotincludemotorefficiencyDoesnotdescribecontrollossesorbenefitsBarePump+Motor(w/ std.motor)DoesnotdescribecontrollossesorbenefitsBarePump+Motor+Controls(w/ std.motorandcontrols)(w/std.controls)

PumpMotor PumpMotorControl Pump3CoveredProductMetricBarePumpEfficiencyorEnergyUseMotorEfficiencyorEnergyUseControlsEfficiencyorEnergyUse‘Pump’EfficiencyorEnergyUse=4PossibleMetricPumpEnergyRating(PER):equallyweightedaverageelectricinputpower(P1)tothe‘pump’measured(orcalculated)atthemotorinputor,whenpresent,controlsinput,overaspecifiedloadprofile(100%,75%,50%,and25%ofBestEfficiencyPoint(BEP)flowatnominalspeed).•Forbarepumporpump+motor,achievepart‐loadbythrottlingthroughpumpcurveatratedspeed.•Forpump+motor+controls,achievepart‐loadbyreducingspeedandcorrectingtoaspecifiedsystemcurveshape.PER=0.25(P1BEP) +0.25(P10.75BEP)+0.25(P10.5BEP)+0.25(P10.25BEP)Notes:DenominatorcouldbeincludedinmetricRatingpointof25%maynotbeappropriate/feasibleforthrottledconfigurations5×standardizedmotorefficiencyandpartloadcurveMOTORpumpperformancedatafrompumptestatratedspeedBarePumpTesting×standardizedcontrolsperformanceControlsExampleofMotorChoice:•Ifstandardmotor:ACInduction,NEMADesignB,openenclosure.•CouldusenextHPabovebrakehorsepowerat120%BEPorotherdefinedmotorrating.•Poleswouldbebasedonspeedatwhichpumpisbeingrated.•Ifstandardfullloadmotorefficiencyisused,itwouldbebasedonFederalstandards(assumingthemotorisatypecoveredbyFederalstandards).•Couldusefullloadmotorefficiencyforallpointsordevelopstandardmotorpart‐loadcurves.6×manufacturermotorefficiencyatfullandpartloadAMOTORBMOTORPUMPBarePump+MotorTestingManufacturercanpairitspumpdatawithmanufacturermotordata.Manufacturercanmeasurepowerofpump+motorcombo.standardizedcontrolsperformanceControls×pumpperformancedatafrompumptestatratedspeedstandardizedcontrolsperformanceControls×7pumpperformancefrompumptestatratedandreducedspeed×motor/driveperformancedataABVFDMOTORControlsMOTORPUMPBarePump+Motor+ControlsTestingManufacturercanpairitspumpdatawithtestedmotor+VFD data.Manufacturercanmeasurepowerofpump+motor+controlscombo.Alternative•Coulddevelopstandardsystemcurve/factorstouseforthisconfiguration,andtestingthemotorandcontrolsmightnotberequired.8ܲܧܴ ൌ 	 ߱଴.ଶହ௉బ.మఱఎ೘೚೟೚ೝ,బ.మఱ൅ ߱଴.ହ଴௉బ.ఱబఎ೘೚೟೚ೝ,బ.ఱబ൅ ߱଴.଻ହ௉బ.ళఱఎ೘೚೟೚ೝ,బ.ళఱ൅ ߱஻ா௉௉ಳಶುఎ೘೚೟೚ೝ,ಳಶುWhere:•ωi=weightingateachratingpoint(coulduse0.25forallratingpointsorotherdeterminedweights),•Pi=measuredinputpower(brakehorsepower)tobarepumpatratingpointi,-[Basedonthrottlingalongpumpcurve]•ηmotor,i=motorefficiencyatratingpointi,-BarePump:couldusedefaultvaluesforastandardmotor;-BarePump+Motor:couldusemotormanufacturerprovidedvaluesorfullloadefficiencyforallratingpoints•i=loadpointscorrespondingto0.25(25%ofBEPflow),0.50(50%ofBEPflow),0.75(75%ofBEPflow),andBEP(BEPflow)(orotherdeterminedpoints)Note:asindicatedabove,theformuladoesnothavetousepart‐loadefficiencyvaluesforthemotor– itcouldusethenominalfull‐loadefficiencyforallloadingpointsBarePump/BarePump+MotorEquation9ܲܧܴ ൌ߱଴.ଶହ௉బ.మఱఎ೏ೝ೔ೡ೐,బ.మఱ൅ ߱଴.ହ଴௉బ.ఱబఎ೏ೝ೔ೡ೐,బ.ఱబ൅ ߱଴.଻ହ௉బ.ళఱఎ೏ೝ೔ೡ೐,బ.ళఱ൅ ߱஻ா௉௉ಳಶುఎ೏ೝ೔ೡ೐,ಳಶುWhere:•ωi=weightingateachratingpoint(coulduse0.25forallratingpointsorotherdeterminedweights),•Pi=measuredinputpower(brakehorsepower)tobarepumpatratingpointi,-[basedonreducingspeedalongorcorrectingtoaspecifiedsystemcurve]•ηdrive,i=combinedmotorandcontrolefficiencyatratingpointi,-[couldusedefaultvalues,whichwouldbeprovidedintestprocedure]•i=loadpointscorrespondingto0.25(25%ofBEPflow),0.50(50%ofBEPflow),0.75(75%ofBEPflow),andBEP(BEPflow)(orotherdeterminedpoints).Note:asindicatedabove,theformuladoesnothavetousepart‐loadefficiencyvaluesforthedrive– itcoulduseasingleefficiencyvalueforallloadingpointsBarePump+Motor+ControlsEquation10ExampleofMetricApplicationNote:TheexampleonthefollowingslidesisprovidedforthelimitedpurposeofdemonstratingthepotentialapplicationofthePERmetric.ItdoesnotrepresentadecisionbyDOEonanappropriatemetricorstandardlevelfortheproductstobeaddressedbythepumpsworkinggroup.Valuesusedtocompareanexamplepumptotheexamplecalculatedefficiencylevelareforillustrationpurposesonlyandshouldnotbeconsideredasrepresentingrecommendedvalues.ThecomparisonoftheexamplePERmetrictotheMEImetricisprovidedonlytodemonstratetheresultsofthecalculation,anddoesnotrepresentanevaluationbyDOEoftherelativemeritsofoneapproachovertheother.11TheefficiencylevelforagivenpumpcouldbesetbyselectingatargetMEIlevel,takingintoaccountfederalbaselinemotorefficiency,andusingthosetocalculateminimumrating(PER)requiredforeachpump asafunctionofNsandQ.ܲܧܴா௙௙.௅௘௩௘௟ൌ ߱଴.ଶହ∗௉೓೤೏ೝೌೠ೗೔೎,బ.మఱఎ೛ೠ೘೛,బ.మఱ∗ఎ೘೚೟೚ೝ,బ.మఱ+߱଴.ହ଴∗௉೓೤೏ೝೌೠ೗೔೎,బ.ఱబఎ೛ೠ೘೛,బ.ఱబ∗ఎ೘೚೟೚ೝ,బ.ఱబ൅ ߱଴.଻ହ∗௉೓೤೏ೝೌೠ೗೔೎,బ.ళఱఎ೛ೠ೘೛,బ.ళఱ∗ఎ೘೚೟೚ೝ,బ.ళఱ+߱஻ா௉∗௉೓೤೏ೝೌೠ೗೔೎,ಳಶುఎ೛ೠ೘೛,ಳಶು∗ఎ೘೚೟೚ೝ,ಳಶುWhere• 

# P

hydraulic,	iishydraulicpower(HP)ateachoftheloadingpoints.Thisisameasuredvalueforeachpump.•ߟ݉ݎ݋ݐ݋,݅istheefficiencyofaminimallycompliantmotor(Federalstandards)thatisoftheappropriatetypeandsizeforagivenpump.Iffullloadefficiencyisusedatallloadpoints,eachߟ݉ݎ݋ݐ݋,	icanberepresentedbyߟ݉ݎ݋ݐ݋Thisisthesameefficiencythatwouldbeappliedwhencalculatinganindividualpump’sPERscore•ߟ௣௨௠௣,஻ா௉isatargetvaluethatisafunctionofspecificspeedandflow(asinMEIapproach)ߟ௣௨௠௣,௜aretargetvaluesthatmaybesomefractionofߟ௣௨௠௣,஻ா௉Targetߟ௣௨௠௣valueswouldnothavetobemetindividually.Rather,thepumpefficiencyvaluesareintermediatecalculationsthatwillcontributetotheoverall 

# PER

Eff.	Levelthatapumpwouldhavetomeet.ForapumpthatdoesnotmeettherequiredPER,themanufacturercouldchoosetoimprovehydraulicefficiencyORchoosetomanufacturethepumpwithamotororcontrolsystemthatmakesitmoreefficientthanthefederalbaseline.Howametriccouldbeconstructed:BarePumps12ߟݑ݌

݉݌,BEPcanbecalculatedthesamewayasinMEI,asafunctionofflowandspecificspeed.ߟݑ݌

݉݌at75%,50%,and25%canbecalculatedasapercentageofߟݑ݌

݉݌,BEP•IntheEU,pumpefficiencyat75%BEPflowmustbe94.7%ofߟݑ݌

݉݌,BEP•UsingasubsetofHIdata(ESFMpump,4pole),DOEanalyzedpart‐loadpumpefficiencyasapercentageofBEPefficiency:•Theresults,intheformofpopulationaveragevalues,areasfollows:-At75%BEP flow,ߟݑ݌

݉݌,0.75is95%ofߟݑ݌

݉݌,BEP–Efficiencyasapercentofߟݑ݌

݉݌,BEPwasindependentofflowandfairlyindependentofspecificspeed–AgreeswithEUvalue-At50%BEP flow,ߟݑ݌

݉݌,0.50is78.5%ofߟݑ݌

݉݌,BEP–Estimatedߟݑ݌

݉݌,0.50byfitting2ndorderpolynomialstothe75%,100%,and110%BEPefficiencydataprovidedbyHI.–Efficiencyasapercentofߟݑ݌

݉݌,BEPwasindependentofflow,fairlyindependentofspecificspeed,butshowedalargerstandarddeviationthanat75%BEP (possiblyduetoestimatingߟ݌݉ݑ݌,0.50(data-25%BEPflow:Nodataavailable;thisflowpointisomittedforthisanalysisSettingTargetValues13Howefficiencylevelscouldbeset:BarePumpsWithߟݑ݌

݉݌,0.50andߟݑ݌

݉݌,0.75definedas(0.785xߟݑ݌

݉݌,BEP) and(0.950xߟݑ݌

݉݌,BEP)respectively,andusingfullloadmotorefficiencyforallpoints,the 

# PER

Eff.	Levelequationcanbesimplifiedto:ܲܧܴா௙௙.௅௘௩௘௟ൌ1ߟ௥௢௧௠௢ൈ߱଴.ହ଴ܲ௛௬ௗ௥௔௨௟௜௖,଴.ହ଴0.785	 ൈ 	ߟ௣௨௠௣,஻ா௉+߱଴.଻ହܲ௛௬ௗ௥௔௨௟௜௖,଴.଻ହ0.950 ൈ 	ߟ௣௨௠௣,஻ா௉+߱୆୉୔ܲ௛௬ௗ௥௔௨௟௜௖,஻ா௉ߟ௣௨௠௣,஻ா௉Where:ߟݑ݌

݉݌,BEPinthisexampleisfromtheMEIsurface,usingflowandspecificspeed.•Ifthisapproachisused,theactualvalueofߟݑ݌

݉݌,BEPcouldbedeterminedbytheC‐valueor“MEILevel”thatisultimatelyselectedasaresultofthestandardsanalysis.PleaseNote:thevaluesof0.785and0.950arepreliminaryandareusedfordemonstrationpurposesonly.Ifthisapproachisusedfortheratingmetricandstandard,theselectionofactualvaluesforthesefactorswouldbemadebaseduponfurtheranalysis.14ExampleScenarioandCalculationsGiventheFollowingTheoreticalPumpandParameters•Flow:880GPM•SpecificSpeed:1500•PBEP=30.99HP(Shaft),26.0HP(Hydro)•P0.75=27.67HP(Shaft),22.4HP(Hydro)•P0.50=24.64HP(Shaft),17.6HP(Hydro)•ߟMotor,Default=93%•LoadPointWeight=1/3[even]ܲܧܴ௖௟௔஼௨௟௔௧௘ௗൌ	߱଴.ହ଴ܲ଴.ହ଴ߟ௥௢௧௠௢൅ ߱଴.଻ହܲ଴.଻ହߟ௥௢௧௠௢൅ ߱஻ா௉ܲ஻ா௉ߟ௥௢௧௠௢ܲܧܴ௖௟௔஼௨௟௔௧௘ௗൌ10.93ൈ13ൈܲܪ	29.86 ൌ ܲܪ30.99 ൅ ܲܪ27.67	 ൅ ܲܪ24.64ߟBEP=84.04%ߟ0.75=80.98%ߟ0.50=71.50%15ExampleScenarioandCalculationsNowwecancalculatepotentialefficiencylevelsandseehowtheexamplepump’sratingswouldcomparetotheprospectiveC‐valueorPERateachMEIlevelܲܧܴா௙௙.௅௘௩௘௟ൌ1ߟ௥௢௧௠௢ൈൈ ߱଴.ହ଴ܲ௛௬ௗ௥௔௨௟௜௖,଴.ହ଴0.785	 ൈ 	ߟ௣௨௠௣,஻ா௉+߱଴.଻ହܲ௛௬ௗ௥௔௨௟௜௖,଴.଻ହ0.95 ൈ 	ߟ௣௨௠௣,஻ா௉+߱୆୉୔ܲ௛௬ௗ௥௔௨௟௜௖,஻ா௉ߟ௣௨௠௣,஻ா௉ܲܧܴா௙௙.௅௘௩௘௟ൌ10.93ൈ13ൈ1ߟ௣௨௠௣,஻ா௉ൈ17.6.785+22.4.95+26.01PERCalculated:29.86ߟpump,BEP= 84.04%PassingC‐ValueforthisPump: 123.87MEILevel C‐ValueߟPump,BEPPEREff.Level10 134.0 73.92% 34.940 128.8 79.15% 32.670 124.8 83.10% 31.180 123.2 84.71% 30.590 121.0 86.95% 29.7Theseresultsdemonstrate howthecalculatedPERfortheexamplepumpwouldcomparetotheexamplePERefficiencylevelsateachMEIcutofflevel,comparedwiththeC‐valuecutoffvaluesforthesamepump.