Wind Speed Prediction in Complex Terrain Using a Commercial CFD Code.
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초록
InvestigationsonmodelingmethodsofaCFD windresourcepredictionprogram,WindSim foraccuratepredictions ofwindspeedswereperformedwiththefieldmeasurements. MeteorologicalMastshavingheightsof40m and50m wereinstalledattwodifferentsitesincomplexterrain.Thewindspeedsanddirectionweremonitoredfrom sensors installedon themastsandrecordedforoneyear.Modeling parametersofWindSim inputvariablesforaccurate predictionsofwindspeedswereinvestigatedbyperformingcrosspredictionsofwindspeedsatthemastsusingthe measureddata. FourparametersthatmostaffectthewindspeedpredictioninWindSim including thesizeofa topographicalmap,cellsizesinxandydirection,heightdistributionfactors,andtheroughnesslengthswerestudied tofindoutmoresuitableinputparametersforbetterwindspeedpredictions. Theparameterswerethenappliedto WindSim topredictthewindspeedofanotherlocationincomplexterraininKoreaforvalidation.Thepredictedannual windspeedswerecomparedwiththeaveragedmeasureddataforoneyearfrom meteorologicalmastsinstalledforthis study,andtheerrorswerewithin6.9%. Theresultsoftheproposedpracticalstudyarebelievedtobeveryuseful togiveguidelinestowindengineersformoreaccuratepredictionresultsandtime-savinginpredictingwindspeedof complexterrainthatwillbeusedtopredictannualenergyproductionofavirtualwindfarm incomplexterrain. Keywords:Parametricstudy,windspeed,complexterrain,WindSim,CFD
Abstract
InvestigationsonmodelingmethodsofaCFD windresourcepredictionprogram,WindSim foraccuratepredictions ofwindspeedswereperformedwiththefieldmeasurements. MeteorologicalMastshavingheightsof40m and50m wereinstalledattwodifferentsitesincomplexterrain.Thewindspeedsanddirectionweremonitoredfrom sensors installedon themastsandrecordedforoneyear.Modeling parametersofWindSim inputvariablesforaccurate predictionsofwindspeedswereinvestigatedbyperformingcrosspredictionsofwindspeedsatthemastsusingthe measureddata. FourparametersthatmostaffectthewindspeedpredictioninWindSim including thesizeofa topographicalmap,cellsizesinxandydirection,heightdistributionfactors,andtheroughnesslengthswerestudied tofindoutmoresuitableinputparametersforbetterwindspeedpredictions. Theparameterswerethenappliedto WindSim topredictthewindspeedofanotherlocationincomplexterraininKoreaforvalidation.Thepredictedannual windspeedswerecomparedwiththeaveragedmeasureddataforoneyearfrom meteorologicalmastsinstalledforthis study,andtheerrorswerewithin6.9%. Theresultsoftheproposedpracticalstudyarebelievedtobeveryuseful togiveguidelinestowindengineersformoreaccuratepredictionresultsandtime-savinginpredictingwindspeedof complexterrainthatwillbeusedtopredictannualenergyproductionofavirtualwindfarm incomplexterrain. Keywords:Parametricstudy,windspeed,complexterrain,WindSim,CFD
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