ID Fan Capability - Amazon S3 .testing to relevant codes such as ASME PTC 11 - Fans • auditing

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  • HRL Technology Group Pty Ltd ABN 89 609 887 327 info@hrl.com.au hrl.com.au

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    Queensland Unit 2 33-37 Rosedale Street Coopers Plains QLD 4108 Phone +61 7 3423 4300 Fax +61 7 3345 5937

    1

    IDFan

    Cap

    ability

    hrl:

    IDFanCapabilityOptimisinginduceddraftfanperformanceandreliability

    ChallengesSub-optimalinduceddraft(ID)fanperformancecanleadtoshort-andlong-termissuessuchas: prematurecrackingoffanimpellers increasedpowerconsumptionandhenceauxiliaryload damagetofanimpellersthrougherosion.Solutionshrl:canhelpplantoperatorsmeetthesechallengesby: providingindependentIDfanperformance/acceptance

    testingtorelevantcodessuchasASMEPTC11-Fans auditingfandesignusingstressandmodalanalysis

    (finiteelementmethods),impulsetesting,fatigueassessmentsandstraingaugesurveys

    undertakingprocessmodellingandcomputationalfluiddynamics(CFD)modellingofthefansandsurroundingductworkunderexistingandpotentialoperatingconditions.

    Benefitshrl:servicesandexpertiseprovideplantoperatorswithnumerousbenefits,including: independentacceptancetestingtoensureoriginal

    equipmentsuppliersperformanceguaranteesaremet performancetestingandprocessmodellingproviding

    insightintohowplantoperatingconditionsareimpactingonIDfanperformanceandefficiency

    auditingfandesignstodeterminethesteadystate,staticanddynamicstressesexperiencedduringoperation;andthemodefrequenciesandshapes,tohelpdeterminethecauseandriskofprematurecracking

    auditingthatcanalsodetermineexpectedfanlifeandassistindevelopingweld-repairprocedures

    usingcomputationalfluiddynamicsmodellingtorevealtheunderlyingflowstructureswithinthefanandsurroundingductworktodiagnoseperformanceissuessuchasvibrationcausedbythefanoritsinteractionwithsurroundingductwork

    usingCFDmodellingtopredicterosionpatternscausedbyparticle-ladenflowstohelpplanmaintenanceandcomparescenariostominimisesucherosion.

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    Case Study Investigating premature cracking in an ID fan AnAustralianpowerstationfoundsignificantcrackingwithintheimpellerononeoftheirinduceddraftfans.Theimpellerhadbeenreplacedthreeyearsearlierandhadbeensubjectedtoseveraldesignchanges,suchthatthereplacementimpellercouldbeconsideredasadifferentstructuretotheoriginal.hrl:wasengagedbythepowerstationoperatorstoinvestigatetherootcauseofprematurecrackinginthenewimpeller.hrl:investigatedthecrackingby: installing(wireless)straingaugesontothenewimpeller

    tosurveystrainduringstart-upandnormaloperation undertakingafiniteelementanalysis(FEA)ofthefanto

    determinetheresonantfrequencyoftheimpellerandmodeshapeofthenaturalfrequencies

    undertakingsteady-stateanalysistocomparetheoperatingmeanstressofthenewimpellertotheoriginal

    performingastiffenedmodalanalysistodeterminethesystemsnaturalfrequenciesandmodalshapes

    performinganunstiffenedmodalanalysistodeterminestaticnaturalfrequenciesforvalidationagainstimpacttestingresults

    performancetestingofthefanduringoperationtodetermineitsefficiencyunderdifferentoperatingconditions.

    hrl:establishedthemostprobablecauseofthecrackingtobevibration,possiblylinkedtothechangedimpellerdesign.hrl:providedthepowerstationoperatorswithoptionstopreventfurthercrackingoftheirIDfans.hrl:recommended: thefanmanufacturerreviewthefanflow-design

    characteristicsbasedontheperformancetestdatahrl:collectedunderplantoperatingconditionsnearstallatlowload

    tomitigatetheflow-inducedvibration,thestationtoconsiderasmallerfan,orinstallingavariablespeedfanorbypassductsystem

    installingflue-gasflowmeasurementdevicesonbothfanstoeliminatebiastoonefan

    specificoperatinginstructionstoavoidrunningthefanatnear-stallcondition.

    Contact JamesTaylor

    Telephone+61395659867Mobile+61438862702Emailjtaylor@hrl.com.au

    Contact DaoNguyen

    Telephone+61395659783Mobile+61427184907Emaildnguyen@hrl.com.au

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