BS2008 EEBA Lstiburek rev - Building Science Corporation · Building Science Green? Joseph...
Transcript of BS2008 EEBA Lstiburek rev - Building Science Corporation · Building Science Green? Joseph...
Building Science
Green?
Joseph Lstiburek, Ph.D., P.Eng, ASHRAE Fellow
www.buildingscience.comBuilding Science Corporation
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It’s The Energy Stupid
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Buildings Are The Key To Energy SecurityAnd Climate Change
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Hubbert’s Peak
• Shape of oil production in the US lower 48
• Predicting the peak made Hubbert famous
Ref: Hirsch 2005
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Uppsala Hydrocarbon Depletion Study Group
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Production vs Discovery
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Where is the Oil?
Th
es
e f
olk
s n
ot
alw
ay
s f
rie
nd
ly
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Natural Gas
• Tight supply – likely past peak
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Total EnergyDomestic Sources Supply 70% of Total Energy40% of Total Supply is Petroleum23% of Total Supply is Natural GasBuildings are #1 Use of Energy in the US (40%)
Source: US EIA
Quadrillion Btu
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Transportation Sector Will Compete WithThe Building Sector For The Same Energy
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Coal•Fastest Growing Source of Energy
•America is the “Saudi Arabia of Coal”
•Carbon Dioxide Production Twice that of
Natural gas (fundamental chemistry)
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A half million years of data
240
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50,000100,000200,000300,000
400
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Years Before Present
Today
520
Carb
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Dio
xid
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on
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t (p
pm
)A
tmo
sp
he
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rbo
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pm
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2
-2
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De
via
tio
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rom
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era
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(C
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A half million years of data
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• There is No Question that Climate Change is Happening– The Questions are When, How Bad, Did We do it and Can
We Do Anything About it?– Looks Like Sooner Than Expected– Could be Pretty Bad, But then Again Maybe Not– Looks Like We Did Do it, But Not Completely Sure– We Can Fix It - But is it Worth it?– One Solution – Reduce CO2 Through Efficiency &
Renewables• Energy Security is a Decoupled Issue
– Solution - Efficiency and New Energy Sources (coal?)• Solving Energy Security the Wrong Way Will Worsen Climate
Change• Solving Climate Change also Solves Energy Security
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It’s The Energy Stupid
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Typical Family Carbon Footprint
50 % House
50% Transportation
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Energy 80 percent
Water 15 percent
Materials 5 percent
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Rain Control Layer
Air Control Layer
Vapor Control Layer
Thermal Control Layer
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Window
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Building Science Corporation
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50 % Total Energy Reduction(2,500 ft2 house over basement)
Advanced Framing - less $1000
Insulating Sheathing - wash
95 % Furnace - add $200
Simplified Ductwork - less $500
Basement Insulation - add $1000
Cavity and Roof Insulation - add $750
Windows - add $1000
Heat Exchanger - add $1500
Air Sealing - add $250
16 SEER a/c - add $450
Tankless DHW - add $575
Compact Fluorescent Lighting - add $250
Energy Star Appliances - add $750
Approximately $5,500 more Building Science Corporation
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50 % Total Energy Reduction(2,500 ft2 house over basement)
Costs Approximately $5,500 more
Financed For Approximately $50/month
Saves $100/month in Utilities
Cash Flow is $50/month positive
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We Don’t Have An Energy Problem
We Have A Stupid Problem
We’re Stupid
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Advanced Framing
Use Less Stuff Better
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