ASHRAE.4616-2003 Effects of Environmental Conditions on the Sorption

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1、4616(RP-1097)EffectsofEnvironmentalConditionsontheSorptionofVOCsonBuildingMaterials—PartII:ModelEvaluationJinsongZhangJianshunS.Zhang,Ph.D.QingyanChen,Ph.D.StudentMemberASHRAEMemberASHRAEMemberASHRAEABSTRACTwindowglass.Accordingtothestandarddeviationofthemodelparametersandcorrelationcoeff

2、icientfromcurve-Sorptiondataobtainedbyusingsmallenvironmentalfitting,Anetal.(1999)foundthatthelinearLangmuirmodelchambersunderdifferentenvironmentalconditions(airwasacceptableinfittingtheexperimentaldatafortheequilib-temperature,relativehumidity,andairvelocity)havebeenusedtoevaluatethelin

3、earLangmuirmodelandthediffusionriumconstant(ke)from0.004to22.2m.ForthediffusionmodelforVOCsorptionbydifferentbuildingmaterials.Themodel,Littleetal.(1996)foundthatitcanfittheexperimentaltwomodelswereevaluated(1)bythegoodnessofmodelcurve-datareasonablywell.Theyalsoproposedsomeindependentfit

4、tingtotheexperimentaldataaccordingtotheASTMrecom-methodstomeasurethepartitioncoefficientandthediffusionmendedstatisticalindicesand(2)bytheabilityinpredictingcoefficient(Coxetal.2001).thedesorptionperiodbasedonthedatafromtheadsorptionHowever,thereseemedtobenodirectcomparisonperiod.Thelinea

5、rLangmuirmodelappearedtobesuitableforbetweenthepredictionusingthemeasuredpartitionanddiffu-thepainteddrywallandceilingtilewhilethediffusionmodelsioncoefficientsandthechambertestdata.Duetothelackofseemsmoresuitableforcarpet.Thevariationsofthesorptionexperimentaldata,thetwotypicalsorptionmo

6、delsaregener-modelparametersarenotalwaysconsistentwiththechangesallyvalidatedonlybycurve-fittingwithoutquantitativeindi-oftheenvironmentalconditions.ces.Theystillneedtobevalidatedusingmoredata,especiallyINTRODUCTIONindependentexperimentaldata.Moreover,theeffectsofenvi-ronmentalconditions(

7、airtemperature,relativehumidity,andMostnumericalandempiricalmodelsaresimplificationsairvelocityoverthematerialsurface)onthesorptionand,ofrealityandshouldbeevaluatedfortheirapplicability,accu-thus,ontheparametersofthesorptionmodelhavenotbeenracy,andlimitations.Sorpti