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1、Labsforthe21stCenturyApplying3ÅMolecularSieveTotalEnergyRecoveryWheelstoLaboratoryEnvironmentsJointPresentationBy:MikeDauschP.E.–DirectorofDesign&ConstructionJohnsHopkinsSchoolofMedicineDuanePinnixP.E.–President,RMFEngineeringInc.JohnFischer–TechnologyConsultant,SEMCOInc.JohnsHopkinsRossResearchBu
2、ilding:TheOwner’sPerspectiveJohnsHopkinsRossResearchBuilding:•450,000cfmofcombinedlaboratory/vivarium•164fumehoods,154biosafetycabinetsandgeneralexhaustthroughrecoverywheels•EightSEMCO3Åmolecularsievecoatedtotalenergyrecoverywheels(14’diameter)•13yearsofsuccessfuloperationInitialRiskAssessmentProc
3、ess:•HeadofHealthandSafety,ProjectEngineer,ProjectManagerandothersvisitedasuccessfullaboratoryinstallationusingthewheeltechnology•JohnsHopkinsinstalleda20,000cfmpilotsysteminAnimalVirologytoallowin-housetestingbytheHealthandSafetyOffice•GoodresultsledtotheacceptanceofthetechnologyfortheRossResearc
4、hBuilding•ASHRAEPaperonresultsbyHopkinsStaff(1996)RossBuildingLifeCycleAnalysisTotalrecoverywheelsoffset1452tonsofchillercapacityand680boilerhorsepowerProvidedapositivepresentvaluecashflowof$9,100,000basedon20yearlifecycleWillprovideestimatedenergysavingsintheamountof$16,600,000overthe20yearlifecy
5、cleanalysisperiodAssumes:inflationat2.5%andcostofcapitalof6%,notaxesMaintenanceRequirements•Allwheelmaintenanceiscompletedinthesupplyairstream,noneedtogoinexhaust•Bearingmaintenance,checkdrivebelt,idlerandgearmotor•Noneedtocleanmediaorchangelabyrinthsealsunlessdamaged•Mediasectionsreplaceableshoul
6、ddamageorcorrosionoccur•Purgeangleadjustedatcommissioning•Initial5yearpartsandlaborwarrantyRossBuildingMaintenanceCost•Nofiltersintheexhaustaircompartment,currentpressurelossiswithin10%ofwhatitwaswhennew•Over13yearsmaintenancecostsamountedtoapproximately$94,000intotalinvolving:–Annualdrivebeltrepl
7、acement–Frequencydriveupgrade–Replacedtransfermediainthreewheelsduetodamage•Maintenancecostlessthan1%ofenergysavingsoverfirst13years($94,000/$9,890,000)JohnsHopkinsRossResearchBuilding:DesignsEngineer’sPerspectiv
