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1、ThermalEnergyTransportWithinPorousPolymerMaterials:EffectsofFiberCharacteristics111,2HuijunWu,JintuFan,NingDu1InstituteofTextilesandClothing,TheHongKongPolytechnicUniversity,HungHom,Kowloon,HongKong2SchoolofMathematicsandSystemScience,ShandongUniversity,Jinan250100,Ch
2、inaReceived17January2007;accepted29March2007DOI10.1002/app.26603Publishedonline26June2007inWileyInterScience(www.interscience.wiley.com).ABSTRACT:Atheoreticalmodelintegratingtheradia-thermalenergyfluxthroughtheporouspolymermaterials,tiveandconductiveheattransferisprese
3、ntedandappliedwhereasincreasingfibreemissivityordecreasingthether-toevaluatethethermalenergytransportwithinporousmalconductivitywouldcauseajustslightreductionofthepolymermaterials.Themodelwasfirstvalidatedbycom-totalthermalenergyflux.Thefiberfractionalvolumehadparingtheco
4、mputedthermalenergyfluxwiththeexperi-asignificantinfluenceonthethermalenergyflux,andmentalmeasurementsoftwoporouspolymermaterialstherebythefiberfractionalvolumecanbeoptimizedinmadeofwoolandpolyester.Themodelwasthenusedtoviewofimprovingthethermalinsulatingperformanceofpredi
5、cttheeffectsofthepolymerfibercharacteristics(viz.theporouspolymermaterials.Ó2007WileyPeriodicals,Inc.fiberfractionalvolume,fiberemissivity,fiberradius,andJApplPolymSci106:576–583,2007fiberthermalconductivity)onthethermalenergyfluxwithintheporouspolymermaterials.Itwasfoundth
6、atKeywords:fibers;thermalproperties;radiation;modeling;decreasingfiberradiuswouldsignificantlyreducethetotalpolyestersINTRODUCTION7,8uponthepropertiesofthepolymerfiber.There-fore,understandingthemechanismsofthermalMostporouspolymermaterialsarethermallyinsu-energytransport
7、withinporouspolymermaterialslating.Increasingthethermalinsulationofthepo-andtheeffectsofpolymerfibercharacteristicsontherouspolymermaterialsallowsthemtobeusedinthermalenergytransportareessentialtothemanyapplications.Oneemergingmarketforther-improvementofthethermalinsul
8、atingperformancemallyinsulatingpolymermaterialsisforfunctional1–3ofsuchmaterials.coldprotectiveclothing,sleepingbags,etc.Wit
