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Orlik-KożdońB.
THEINFLUENCEOFLEAKAGEOFINSULATINGLAYER
ONTHERMALPARAMETERSOFETICSSYSTEM
Orlik-KożdońBożena
SilesianUniversityofTechnology,FacultyofCivilEnginering,
AkademickaSt.5,44-100Gliwice,Poland
e-mail:Bozena.Orlik-Kozdon@polsl.pl
Summary:
Thepurposeofthispaperistoshowapartofresultsofresearchinexamination
ofrigidmaterialusedforthermalinsulationwithmodifiedstructure.Modification
ofthematerialwasrelyingonmakingofparallelperforationstothedirectionof
theheatandmoistureflow.Thebasesolidmaterialwasanexpandedpolystyrene
(15EPS-70-040)withboardthicknessof5cm.Inthebasematerialthecircular
perforationswithdiameterof1,3and5mmweredone,onthe2cmx2cmgrid
(for15EPS-70-40materialadditionalsamplesweredonewithperforations7,9
and11mm).Theresearchesweredividedtopreliminaryandessentialones.The
scopeofresearchincludedthemeasurementofwatervapourfactor’stransferas
wellasthemeasurementofheatconductivityfactor;thethermographiccontrolof
bulkheadinsulatedbysolidandperforatedStyrofoam,thesimulationofthermal-
moisturephenomenainanalyzedbulkheads.Theessentialresearchwasconducted
intheLaboratoryofSolarEnergyUsageintheFacultyofArchitecture.Twowall
arrangementswereanalyzedintheresearch.Thecommonelementwasthewall’s
carryingconstruction.Thefirstbulkheadwasinsulatedbythematerialwitha
modifiedstructure-thestyrofoamwith5mmperforation.Therelativetemperature
andhumidityofexternalandinternalairwasregistered,ontheborderofthe
bulkheadlayersaswell.Theexternalclimateparameterswereregisteredbythe
Kombiweatherstation.Intheframeworkofresearchthemathematicalmodelof
coaxialtransportprocesseswasverified.Moreover,selectedthermal-moisture
parametersofwallarrangementswerespecified.Thesewereasfollows:theheat
conductivityfactorU,thedimensionlesstemperatureofinternalsurfacef
Rsi
,the
watervapourflow
Keywords:thermalinsulation,thermalconductivityfactor,watervapourfactor,
thermal-moistureprocessinbulkhead
Introduction
Thestyrofoamistoday,alongsidethemineralwool,themostcommonmaterialused
inthermalinsulation.Itsphysicalpropertiesasathermalinsulationmaterialusedin
architecturalengineeringwereresearchedasearlyas30yearsago.Oneofitsphysical
properties-thelowwatervapourpenetrability-wasatthesetimesacknowledgedas
disadvantageous.Thegoodthermalinsulation,easinessintreatment,lowabsorption
capacityandlowdensitycausethatthismaterialfounditsimplementationinthejointless
thermalinsulationsystemsofbuildings(ETICS,Instruction447/2009).Thestyrofoam,as
eachbuildingmaterial,hasitsdisadvantages.Thelowwatervapourpenetrabilityisoneof
them.Thefastpaceofbuildingworksandwillingnessforputtingtousethenewlyerected
buildingscausethatstyrofoamisoftenusedinbulkheadscontaininglarge(considerable)
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