energy use in buildins: facts, trends & strategies eurima general meeting budapest, june, 2007
DESCRIPTION
ENERGY USE IN BUILDINS: FACTS, TRENDS & STRATEGIES EURIMA GENERAL MEETING Budapest, June, 2007. EUROPEAN PROPERTY FEDERATION. Represents all aspects of property ownership and investment: residential landlords and housing companies; commercial property investment and development companies; - PowerPoint PPT PresentationTRANSCRIPT
ENERGY USE IN BUILDINS:
FACTS, TRENDS & STRATEGIES
EURIMA GENERAL MEETING
Budapest, June, 2007
• Represents all aspects of property ownership and investment:– residential landlords and housing companies;– commercial property investment and development companies;– shopping centres;– institutional investors (banks, insurance, pension funds, etc.)
• Members provide and manage buildings for the residential, services and industry tenants (own property assets valued at € 800 billion).
EUROPEAN PROPERTY FEDERATION
INTRODUCTION
INTRODUCTION
• “Sustainability” is a complex issue… But we are not alone:
– USGBC (“United States Green Building Council”):
LEED (“Leadership in Energy and Environmental Design”)
– BRE (“British Research Establishment”):
BREEAM (“British Research Establishment Environmental Assessment Method”)
– iiSBE (“International Initiative for a Sustainable Built Environment”)
SB TOOL (“Sustainable Building Tool”)
– “Toronto Green Development Standards”• Toronto City Council
– …
INTRODUCTION
• Certification implies compliance with:• requisites (base line environmental quality);• a percentage of the available credits (leadership environmental quality).
• Different levels of environmental leadership are recognized (silver, gold, …), depending on the number of achieved credits.
INTRODUCTION
• LEED:– 7 requisites;
INTRODUCTION
> 52
> 39> 33
> 26
0
20
40
60
80
Certified Silver Gold Platinum
Environmental Quality
Cred
its
Maximum number of credits: 70
• Substantial growth in the last years…
INTRODUCTION
0
2500
5000
7500
2002 2003 2004 2005 2006
LEED
(n
umbe
r of r
egis
ted
build
ings
)
1414
29
43
88
18
25
18
23
Energy andAtmosphere
IndoorEnvironmental
Quality
Sustainable Sites Materials andResources
Water Efficiency Innovation andDesign
Pré-
requ
isito
s / c
ritér
ios
(dis
trib
uiçã
o po
r áre
a te
mát
ica)
[%]
Critério
Pré-requisito45 % requisites (!)25 % credits
• LEED:
INTRODUCTION
• Independently of the methodology (LEED; BREEAM, etc.), energy is always a key issue in sustainability…
• … which is not a surprise:– Stern Review, 2006: “The scientific evidence points to increasing risks of
serious, irreversible impacts from climate change associated with business-as-usual paths for emissions”;
– …
INTRODUCTION
• BUT “Indoor Environmental Quality” must also be regarded as a “top level priority”…
• …and special attention towards this subject is needed… Energy savings CANNOT be achieved reducing thermal comfort or indoor air quality (as it was the case in the 70’s, when oil price crisis leads to a reduction in outdoor ventilation rates and, consequently, to “Sick Building Syndrome” cases).
INTRODUCTION
INTRODUCTION
0,90,7
0,3
0,5
0,9
0,0
1,0
Scho
ols
Rest
aura
nts
Mee
ting
room
s
Hote
l roo
ms
Offi
ces
Out
door
Ven
tilat
ion
Rat
es[A
SHR
AE
62.2
004
/ ASH
RA
E 62
.200
1]
INTRODUCTION
Fonte: “The effects of Outdoor Air Supply Rate on Perceived Air Quality and SBS Symptoms”, Wargocki, Fanger et al, Indoor Air, FiSIAQ, 2000
0
10
20
30
40
3 10 30
Outdoor Air Ventilation Rate [l/s.pessoa]
Discomfort = 100
Comfort = 0
• Directive 2002/91/EC on energy performance of buildings, Article 1 (Objective):– “… improvement of energy performance… as well as
indoor climate requirements…”;
INTRODUCTION
• 2004: EN 13779 (“Performance Requirements for Ventilation and Room-Conditioning Systems”)
Energy
INTRODUCTION
ENERGY USE IN BUILDINS:
FACTS, TRENDS & STRATEGIES
EURIMA GENERAL MEETING
Budapest, June, 2007
FACTS
• TPES based on non-renewable / high impact energy sources:
Fonte: “World Energy Outlook” IEA 2006
Combustíveis fósseis: 80%
Carvão25%
Gás21%
Nuclear6%
Renováveis13%
Petróleo35%
World, 2004
Fossil and nuclear: 87%Combustíveis fóssesis: 79%
Carvão18%
Gás24%
Nuclear15%
Petróleo37%
Renováveis6%
EU25, 2004
Fossil and nuclear: 94%
FACTS• EU 25, 2004:
Fonte: “Energy and Environment in the European Union”, EEA, 2006
80
70
80 80
0
25
50
75
100
Greenhouse gasemissions
Acidifying substances Tropospheric Ozoneprecursors
Particles
Envi
ronm
enta
l Im
pact
s(g
reen
hous
e ga
s an
d ai
r pol
luta
nts)
[%]
700.000 ton of oil in the oceanes (discharges and splits) and 45.000 ton of nuclear waste (1990 – 2005)
FACTS• EU 25, 2004 (TPES):
INDUSTRY35%
RESIDENTIAL, SERVICES AND
OTHERS45%
TRANSPORT20%
Source: “World Energy Outlook” IEA 2006
ENERGY USE IN BUILDINS:
FACTS, TRENDS & STRATEGIES
EURIMA GENERAL MEETING
Budapest, June, 2007
TRENDS
• Energy use reduction as a “top priority” (legislation, energy costs, investors
CSR policies, general public opinion, etc.):– COM(2006)545 final: “Action Plan for Energy Efficiency: realising the
potential”, 19.10.2006:• “… provide EU citizens with the globally most energy-efficient infrastructure,
buildings, appliances, processes, transport means and energy systems…”
TRENDS
• COM(2006)545 final: “Action Plan for Energy Efficiency: realising
the potential”, 19.10.2006:1. Appliance and equipment labeling and minimum energy performance standards;
2. Building performance requirements:• Based on Directive 2002/91/CE of 16 de December 2002 on energy performance of
buildings;3. Power generation and distribution;
4. Fuel efficiency of cars;
5. Facilitating appropriate financing of energy efficiency investments;
6. Spurring energy efficiency in the new members;
7. Coherent taxation (e.g., Portugal.: VAT for electricity = 5%; VAT thermal insulation = 21%)
8. Raising energy efficiency awareness;
9. Energy efficiency in built-up areas;
10. Foster energy efficiency worldwide.
TRENDS• BAU “versus” COM(2006)545
17501890
1500
0
500
1000
1500
2000
2500
BAU Alternativo COM(2006)545
2005 2020
Mto
e
20% 15%
TRENDS
Fonte: “World Energy Outlook, 2006”, IEA, 2006
19731847
2004 (1756)
0
500
1000
1500
2000
2500
Business as Usual Alternative Policy
TPES
[Mto
e]
= 5%
• BAU “versus” Alternative Policy, EU25 (IEA, 2006):
• “Compared with investment in supply, end-use efficiency improvements…requires a much great number of individual decisions…”
TRENDS
Fonte: “Financing Energy Efficiency: lessons recent experiences”, World Bank, 2006
ENERGY USE IN BUILDINS:
FACTS, TRENDS & STRATEGIES
EURIMA GENERAL MEETING
Budapest, June, 2007
• In the specific case of the building industry, it also necessary to understand:– that “who plays is who decides” (investors and promoters NOT design
teams);– that typical business models do not encourage investments in energy
efficiency…• Speculative business models: promoters will not be users… investments in energy
saving equipments / materials / … do not result in savings;• Non-speculative business models: promoters will be users (the same companies but
not always the same actors) but investments are NOW and REAL while EVENTUAL savings will happen in the FUTURE…
STRATEGIES
• “Bussiness Models”:– The typical argument “invest now and save latter” do not make any
business sense ! What is really necessary is to create:• conditions that allow us to say “invest now and you will sell first” or “invest now and
you will sell more expensive”… (in other words it is necessary that market values energy efficiency);
• effective incentives (e.g., land use bonus, faster administrative process, etc. – the role of local authorities);
• well designed and well enforced legislation.
STRATEGIES
• Project Teams (architects, engineers):– they follow promoters instructions (which will include, if the previous
conditions are fulfilled, energy performance targets…) ;– “know-how”.
BUT
– they are of utmost importance because they are responsible for choosing the most adequate technical solutions to achieve promoters targets (without entailing excessive extra cost).
STRATEGIES
• The list of available technical solutions is almost endless…• Architecture: orientation, fenestration, thermal insulation, …• Energy-use systems: HVAC, lighting, electric motors, … • Energy-supply systems: solar thermal, PV, biomass, …
• … but investment funds are always scarce !
STRATEGIES
• Strategy:– define the base-line solutions (those that leads to legal compliance but no
more); – identify leadership solutions (those that leads to a better performance);– quantify costs and savings associated with each leadership solution (e.g.,
kg CO2 / €) ;
– classify each leadership solution according to its ratio between CO2 emissions savings and investment [CO2/€];
– implement the leadership measures, starting with those with the highest CO2/€ ratio until the limit of available capital.
STRATEGIES
“Strategic Energy Management Hierarchy:
Before considering the incorporation of renewable energy in a building, it is important to ensure that all reasonable cost-effective energy efficiency measures have been incorporated… Once energy efficiency measures have been exhausted, then renewable energy technologies should be considered.”
STRATEGIES
STRATEGIES
ENERGY USE IN BUILDINS:
FACTS, TRENDS & STRATEGIES
EURIMA GENERAL MEETING
Budapest, June, 2007
• The ambition of constructing energy-efficient buildings must be complemented by the ambition of constructing “sustainable” buildings.
CONCLUSIONS
• But energy efficiency, together with indoor environmental quality, is key issue of building sustainability.
CONCLUSIONS
• In the building industry (as well as in the majority of the business activities) who plays is who decides (investors and promoters);
• It is thus necessary to create conditions to make from these players the first interested in energy efficiency:– market must value energy efficiency;– effective incentives (e.g., land use bonus, faster administrative process,
etc.); – well designed and well enforced legislation.
CONCLUSIONS
• Strategy for energy efficient buildings:– commanded by the promoters;
– included in a broader environmental policy;
– but, to be effective, it must be supported by project teams with adequate skills and know-how… they must be able to choose cost-effective solutions to achieve promoters energy performance objectives !
CONCLUSIONS
FUTURE ?
• “Zero Energy Buildings”
FUTURE ?
“Pearl River Tower”, Guangzhou, China (design phase)
• “Zero Energy Buildings”
FUTURE ?