energy efficiency in buildings in the eu and in japan · maison & travaux . french energy...
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Energy Efficiency in Buildings in the EU and in Japan 13 December 2013
Benefits of Energy Efficiency in Buildings
François-Xavier Lienhart Saint-Gobain MAG-Isover
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When we think about Energy, we think about…
Production
2
…
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But these various solutions have drawbacks
CO2 emissions
3
Safety risks
Geopolitical risks (Strategic routes…)
Environmental problems
Cost
Sensitivity of Japanese economy to outside elements (shale gas in the US…)
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When we think about Energy, we also think about… Distribution
Storage Small quantity
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Future grid connections with Korea and China?
Big quantity
?
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My topic is not about all of this, it is about Energy Consumption
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The fewer the issues are
The more we reduce energy needs,
Energy Efficiency is the key
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Which sectors are energy-consuming in Japan ?
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Energy Efficiency = important potential in the Building sector
Buildings = +30% of total energy consumption in most industrialized countries
Develop sustainable energy through reduction of buildings’ needs
Thermal bridges = 5%
Floors = 7%
Windows = 13%
Renewed air = 20%
Roof = 30%
Walls = 25%
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How to improve Energy Efficiency in Buildings?
-
High performance insulation (floor, walls, roof, windows & doors)
- -
)
Green Design (Low impact design)
Efficient Ventilation
Low Energy consumption house =
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How to Develop Greener Buildings?
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Low energy needs
Renewables
New Technologies
Zero Energy House
= = 0 +
=
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It is possible: the French example
New buildings: Maximum primary energy consumption < 50 kWh/m2/year By 2020, primary energy consumption < 40 kWh/m2/year and energy
positive balance
Existing buildings: Long term thermal renovation programme: 400 000 dwellings/year Thermal Regulation and Label consumption <. 80 kWhEP/m2/year Energy Performance Certificate mandatory for all buildings since 2011 Mandatory White Certificates for energy savings by energy distributors
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30 millions dwellings = 40% total final energy consumption 25% GHG emissions
Financing programme for renovation : 0% interest rate loan and tax credit Conditionned on Qualification of installers
photo: Armel ISTIN Architect: Patrice Bideau
Photo: Marie Turner Maison & Travaux
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French Energy Performance Certificate
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French Energy Performance Certificate
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Real estate agency ads Housing ads
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November 2010
Implementation: French Thermal Regulation Agenda
2008 2009 2010 2011 2012 2014 2016 2020
RT 2012* 50
kWhpe/m2/yr
RT 2020*
Grenelle Law
s
Loans (Eco-PTZ), Tax credit
DPE =Energy Performance
Certificate Mandatory for all buildings
NEW Buildings
Existing Buildings
RT existing buildings* and
BBC Label =80 kWhpe /m2/y
0 Interest Loan
(Eco-PTZ)
0 Interest Loan
(Eco-PTZ )
New label Positive Energy
Bldg 40 kWhpe/m2/y
*RT= Thermal Regulation
Recast RT existing buildings
New law for energy transition and
renovation long term programme
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19% 37%
Insulation Standards
Standard annual heating
and cooling MJ/m 2 /yr
Source: MLIT
CO 2 Emission
Existing Building Stock 2009 Source: MLIT
New Buildings Source: MAG
39% 5% -
47% 30% 20% - -
MJ/m 2 /yr
< 54
1980 Reference MJ/m 2 /yr
1030
1992 Reference MJ/m 2 /yr
800
Passive House 1999 Standard MJ/m 2 /yr
460
NONE MJ/m 2 /yr
> 1030
* Zone IV : Tokyo, Nagoya, Kyoto, Osaka, Fukuoka
? 15 kWh/m 2 /yr 127 kWh/m 2 /yr 222 kWh/m 2 /yr 286 kWh/m 2 /yr
20%
*
76% of the existing stock is not or poorly
insulated
30% Only 30% of new houses are built
according to 99 standards
** Building stock: 49 millions of households in 2011
Primary energy
**
3% 50% 50% of new houses in Japan are built according to1999 standard * Zones II to V
76% of the existing building stock is not or poorly insulated
2011
Isover
FR RT 2012 MJ/m2/yr
180 50kWh/m2/yr
Toward EU Passive House in 2020
In Japan, Energy Efficiency also a focus but buildings still lag behind for insulation performances
Japan regulation
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Energy Efficient Houses in Japan are not a dream, they already exist !
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Multi Comfort House Machiya in Kyoto
New houses Traditional-style houses
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Reducing the energy needs is good…
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… At individual level
- Decrease households’ energy bill
- Increase durability of buildings and asset value
- Decrease heating and cooling demand for a better comfort
- Increase air quality and healthy environment benefits
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Reducing the energy needs is good…
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… At country level
- Decrease trade deficit - Decrease geopolitical risks - Decrease CO2 emissions - Keep and create employments (+ minimum 60 000 stable and sustainable jobs)
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Reducing the energy needs is good…
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… For the Japanese economy
Low energy needs in buildings
=
Cheaper energy
Jobs in Japan
=
In particular, in the building sector • Buildings renovation cannot be exported • Building materials are produced locally
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The cheapest and cleanest energy is the energy we don’t need to produce
THANK YOU FOR YOUR ATTENTION
Every Kw/h saved in the building sector will help Japanese Industry’s competitiveness