被动式低能耗建筑外保温系统冬季内部冷凝问题研究 - 副本.docxVIP

研究探讨

建设科技2018年9月上

CONSTRUCTIONSCIENCEANDTECHNOLOGY总第367期

被动式低能耗建筑外保温系统冬季内部冷凝问题研究

霍伟业陈占虎马国栋

（河北三楷深发科技股份有限公司，河北石家庄050430）

[摘要]以单层岩棉条结构和岩棉条-石墨聚苯板双层结构作为被动式低能耗建筑外墙保温层，构建外墙

保温围护结构，研究其在成都、北京、哈尔滨三种典型冬冷气候条件下的冬季内部冷凝情况，围护结构各

层厚度依据《被动式超低能耗绿色建筑技术导则(试行)(居住建筑)》中对外墙传热系数的要求确定。研

究结果表明，围护结构材料的排序对冷凝有明显影响，应在结构允许的情况下，将蒸汽渗透系数低的材料

布置于高温侧；单层岩棉条结构和岩棉条-石墨聚苯板双层结构在三种典型气候区冬季均未出现冷凝现象，

故均可作为被动式低能耗建筑的外墙保温结构。

[关键词]被动式低能耗建筑；岩棉条；石墨聚苯板；围护结构；冷凝

ResearchonInternalCondensationofExternalThermal

InsulationSystemofPassiveandLow-EnergyBuilding

HuoWeiye,ChenZhanhu,MaGuodong

(HebeiSunskyDeeplyDevelopedTechnologyCo.,Ltd.,Shijiazhuang,051430Hebei)

Abstract:Inordertotesttheinternalcondensationinwinter,aresearchiscarriedontoutilizesingle-layerstructure

withrockwoolstripanddouble-layerstructurewithrockwoolstripandgraphitepolystyreneboardastheexternal

insulationmaterialsforthepassiveandlow-energybuildingenveloperespectivelyunderthreetypicalwinter

climaticconditionsinChengdu,BeijingandHarbin.Thethicknessofeachlayerofthetwoenvelopestructuresis

determinedaccordingtotherequirementsoftheheattransfercoef?cientofexteriorwallaccordingtotheTechnical

GuidelinesforPassiveandUltra-low-energyGreenBuildings(Trial)(ResidentialBuilding).Theresultsshow

that,thearrangementofenvelopematerialhasobviousin?uenceoninternalcondensation.Thematerialwithlow

vaporpermeabilitycoef?cientshouldbeplacedonthehightemperaturesideifthestructureispermitted.Boththe

single-layerstructurewithrockwoolstripanddouble-layerstructurewithrockwoolstripandgraphitepolystyrene

boarddonotcondensateinwinterinthethreetypicalclimaticregions,thereforetheycanbeusedasexteriorwall

insulationstructureforpassiveandlow-energybuilding.

Keywords:Passiveandlow-energybuilding,rockwoolstrip,graphitepolystyreneboard,enclosurestructure,

condensation

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