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
When we think about Energy, we think about…
Production
2
…
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…)
When we think about Energy, we also think about… Distribution
Storage Small quantity
4
Future grid connections with Korea and China?
Big quantity
?
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
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%
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 =
How to Develop Greener Buildings?
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Low energy needs
Renewables
New Technologies
Zero Energy House
= = 0 +
=
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
French Energy Performance Certificate
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French Energy Performance Certificate
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Real estate agency ads Housing ads
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
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
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
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
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)
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
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