Knowledge Seminar Series : High Performance...
Transcript of Knowledge Seminar Series : High Performance...
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KnowledgeSeminarSeries:HighPerformanceGlass
October18,2017
JimLarsenDirector,TechnologyMarketing
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CardinalGlassDivisions
• FG:flatglass• TG:tempered(safety)glass• CG:coatedglass(low-E)• LG:laminatedglass(safety&hurricane)• IG:insulatingglass(2and3paneunits)
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WinnipegGlassDesignPriorities
• Coldweather:DesignforlowU-Factor– Reduceheatloss– Warmerglasssurfaceatwinternight
• WintersunonSouthelevation– Potentialforpassivedesign
• SummersunonEast&Westelevations– Bewarediscomfortduetooverheat
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5 months below freezing
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5 months below freezing
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Low-Eunitsarewarmonwinternight. Clearglassiscool.
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WinterSun:8hoursofDaylight
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SummerSun:16hoursofDaylight
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Highsolargainlow-Eishotinsunlight
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EnergyTerms
• U-Factor(heatloss)
• SHGC:SolarHeatGainCoefficient
• VT:VisibleLightTransmission– Aesthetic(clarity,color)– Daylightingenergymostlyincommercial
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TraditionalEnergySolutionsforWindows
1. Addlayerstoinsulateglass– Single,double,triple,etc.
2. Changeframematerial– Metal,thermalbreak,wood/vinyl/fiberglass– Addwarm-edgespacer
3. Addtintedorreflectiveglass– Absorbsunlightwithtintedglass– Rejectwithreflectiveglass
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TheRuleofPanes
Eachlayerofglassinamulti-paneunitaddsapproximately1“R”totheinsulatingvalue
(Inch-PoundR-Value)
Low-Ecoatingsandgasfillsdisplacelayersofglass
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LotsofPanes
SinglePane ~R1DoublePane ~R2TriplePane ~R3QuadPane ~R4………
“Octo-Pane” ~R8
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“R2”Glass
WindowU~0.50(2.8)
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“R4”Glass
WindowU~0.35(2.0)
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Less“Pain”withLow-E
• SinglePane ~R1• DoublePane ~R2• TriplePane ~R3• QuadPane ~R4
• 2Pane+Low-E ~R3• 2P+Low-E+Argon ~R4
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MoreLow-EandMorePanes
• SinglePane ~R1• DoublePane ~R2• TriplePane ~R3• QuadPane ~R4
• 2Pane+Low-E ~R3• 2P+Low-E+Argon ~R4
• Triplew/2Low-E+Argon ~R8
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Non-MetalWindowU~0.30(1.7)
2Pane+WarmEdge+Low-E+Argon
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TraditionalOptionsforSolarControlGlass
Tinted– Addscolorto“body”ofglass– Absorbssunlightandre-radiatestoexterior
Reflective– Mirrorappearance– Reflectssunlightout
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ClearGlassWindowSHGC
~0.60
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WindowSHGC
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TheSolarSpectrum
45%3% 52%
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2PClear:WindowSHGC~0.6
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2PTinted:WindowSHGC0.4– 0.5
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ANewOptionforSolarControlGlass
Tinted– Addscolorto“body”ofglass– Absorbssunlightandre-radiatestoexterior
Reflective– Mirrorappearance– Reflectssunlightout
SpectrallySelectiveLow-E– Clearglassappearancewithsolarcontrol– Reflectssolarinfrared(invisibletohumaneye)
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HighSolarGainLow-E:WindowSHGC~0.5
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MediumSolarGainLow-E:WindowSHGC~0.3
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|Low-E|ClearGlassMedSolar|HighSolar
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LowSolarGainLow-E:WindowSHGC~0.2
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DualPaneInsulatingGlass
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HighSolarGainLow-EonSurface3=HotinSunlight!
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TriplePaneInsulatingGlass
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TriplePaneCoatingRecommendations
• Avoidlow-Eoncenterpane(#3or#4)
• Usehighsolargainlow-Eon#5forbestvisiblecharacteristicsandloweredriskofthermalstressbreakage
• SelectHigh,Medium,orLow solargainlow-Efor#2surface(orientationspecific)
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Thankyou!
Anyquestions?