雙層屋面空氣層隔熱性能計(jì)算分析.pdf

1、浙江大學(xué)建筑工程學(xué)院碩士學(xué)位論文雙層屋面空氣層隔熱性能計(jì)算分析姓名：趙黎申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：土木工程指導(dǎo)教師：俞亞南20080601AbstractDoubleskindesignisknownasaneffectivewayteducethebuilding’SsolarheatgainInthetradition，wepayattentiontOthe“energysavinginthestructure”，settingthe

2、rmalinsulatinglayertoinsulateheatfromoutside，butinthisway，thestructuredidnotexpressallthepotentialoftheairlayer，andtherealsoexistmanyproblemofleakingandseepingTheCUBICSpaceFrameconnectthetopchordplyandthebottomchordplywi

3、ththeshearconnector，itispropitioustoexpressthemechanicalpropertiesandthermalinsulationproperty，itcangatherthebuildingfunctionandthemechanicalpropertiesinintegralwholeTheoreticalresearchonheatinsulationeffectofairlayerisn

4、otyetperfectAnalyzetheeffectoftheparameterstotheheatthansferhavetheoreticalsignificanceandguidingsignificanceinengineeringThispaperdescribethethermalinsulationpropertyofCUBICSpaceFrame，analyzetheeffectsofthespacebetween，

5、airvelocityandventilationmodeintheCUBICSpaceFrameFirst，usethenaturalconvectiontheorytoanalyzethermalresistanceofsealedairlayer，andtheoreticarithmeticformulaofthebiggestthermalresistancevalueisputforwardSecendly，basedonth

6、eboundarylayerheattransfertheory，theoreticarithmeticformulaofairgapheightundertheconditionoftwodimensionalforcedstableflowingisputforwardFinally，amathematicalmodeloftemperaturefieldanvelocityfieldbetweenthethermalinsulat

7、inglayerandtheroofwasestablishedwiththesoftwareFLOTRANbyusingthel卜一￡turbulencemodeliterativecomputationwascarriedonuntilconvergencewasreachedthendetailsonvelocityandtemperaturedistributionwasgainedDifferentconditionsthat

8、influencetheheattransferbytheairflowwerecomparedsuchasthevelocityofinletair，distancebetweenoverheadthermalinsulatinglayerandroofandSOonTheresultshowthatbyusingdouble—skinrooftheheattransferredbytheair，willincreaseswithth

9、eriseofthedistancebetweenWhenthedistanceiSmorethan03meter，theincreasetrendofheattransferedisslowlyTheheattransferisalsoincreasewiththevelocityofairflowSowhendesigningthewindgapshouldmadethevelocityasbigaspossibleTheoreti

10、carithmeticformulaofsealedairlayerandopenedairlayergivedoutbythispapercanbeusedforreferenceinengineeringdesignKeyWords：BuildingenergysavingDoubleskinroofsAirheatinsulationFlowandheattransferThermalconductionThermalresist