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1、FluidFlowSystemsAnalysisToSaveEnergyPareshS.Parekh,UnicadeInc.ABSTRACTIndustrialprocessesuserotatingequipment(e.g.;pump,fan,blower,centrifugalcompressor,positivedisplacementcompressor)andpipe(orduct)tomovefluidfrompointAtoB,withmanyprocessesusingelectri
2、cmotorsastheprimemover.Mostofthesystemsintheindustryareover-designedtomeetapeakloaddemandwhichmightoccuroverasmallfractionofthetimeortosatisfyahigherpressuredemandedbyamuchsmalleruserinthesameprocess.Thesystemover-designwillresultinaselectionoflargerbut
3、inefficientrotatingequipmentandelectricmotorsystem.Someofthetypicaldesignexamplesthatresultinhigherenergyusagearegivenbelow.·Arotatingequipmentservingmultipleend-userswithvariedprocessneeds.·Under-designedsystemcomponentssuchasasmallerpipediameter,along
4、erpiperun,and/orasmallercontrolvalvetakingexcessivepressuredrop.·Amulti-passheatexchangertoobtainclosertemperatureapproachandanexchangerwithasmallersurfaceareatoreducethecapitalcost.Theprocess,however,ispenalizedwithahigherpressuredropandahigherannualop
5、eratingcost.·Aroutinepracticeintheprocessindustrytodesignprocesscontrolvalvesthatconsumeasmuchas30%ofthesystempressuredropor10psiminimumatnormalfluidflow.·Acentrifugalpumporfannotoperatingonitsbestefficiencypoint(BEP)ofthecurve.Acarefullifecyclecostande
6、conomicevaluationmustbeundertakentoensurethattheprocessaudit,reengineeringandequipmentselectionsarenotimpactingtheindustrialprocessgoals,butresultinaleastoptimalcostoverthelifeoftheproject.Thepaperwilldefine,discuss,andpresentvarious“processsystems”inch
7、emical,hydrocarbonandpulp&paperindustries.Itwilldiscusstheinteractiveimpactofthechangesinthemechanicalsystemconfigurationandthechangesintheprocessvariablestobetterredesignthesystemandreducethecostofoperation.Itwillalsopresentachecklistofenergyconservati
8、onmeasures(“ECM”)oropportunities.SuchECMswillberelatedtohydraulics,systemcomponents,processmodifications,andsystemefficiency.Twoorthreecasestudieswillbepresentedfocusingonvariousconservationmeasuresthatimproveelectricaloperatinge
