Net Zero Energy Buildings,Net Zero Energy Buildings,
towards innovation and development solutions
Helder Gonçalves, Laura Aelenei, Daniel Aelenei
International Conference on:Solar Energy and Architecture
FCT-UNL: 30.3. 2012
IEA SHCP Task 40 / ECBCS Annex 52
Towards Net Zero Energy Buildings
Prof. Karsten Voss
University Wuppertal, School of Architecture, Building Physics and Technical Services, Germany
NZEB - definição
Necessidades == ProduçãoEnergy
DemandEnergy Supply
Energiaconsumida
Energia produzida
• Heating
• Cooling
• Lighting
• Hot Water
• Appliances
x Kwh
• Electricity
(PV, wind, geothermal)
• Thermal(Solar, Geothermal )
y Kwh
De
fin
içõ
es/
Me
tod
olo
gia
s/D
esa
fio
s
Input = Output
Energy Supply
Specific balance items
Balance boundary
Metric (Primary energy, carbon emission, cost)
Balance items (heating, cooling, DHW)
Balance period
De
fin
içõ
es/
Me
tod
olo
gia
s/D
esa
fio
s
Input = Output
Energy Demand
Challenges
Net ZEB Performance Indicators
Common Definition Framework
Building Code Relevance
Architectural Integration
Monitoring /Measured data
RECAST EPBD
DIRECTIVE 2010/31/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCILof 19 May 2010
on the energy performance of buildings(recast)
Article 9
Nearly zero-energy buildingsNearly zero-energy buildings
1. Member States shall ensure that:
(a) by 31 December 2020, all new buildings are nearly zero- energy buildings;
and
(b) after 31 December 2018, new buildings occupied and owned by public
authorities are nearly zero-energy buildings.
Member States shall draw up national plans for increasing the number of nearly
zero-energy buildings. These national plans may include targets differentiated
according to the category of building.
Nearly Zero-Energy Buildings/Edifícios com necessidades quase nulas de energia
1. Definição1. Definiçãopro
dução d
e e
nerg
ia
-
+
=
EPBD recast
Article 2Definitions
‘nearly zero-energy building’ means a building that has a very high energy performance, as determined in accordance with Annex I. The nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable
necessidades energéticas
- significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby;
Low energybuilding nZEB
International Energy Policy
USAUSA: “The building technologies program outlines the technology portofolio and activities
that are necessary to achieve our strategic goal of net zer-energy buildings (NZEB) at
low increment cost by 2025.”[www1.eere.energy.gov/buildings/about/,01/2007]
UKUK: “The objective of the proposal is to set a timetable for movinf towards zero carbon development as a contribution to meeting the UK target to reduce carbon emission by 60%
by 2050.”by 2050.”[Department for Communities and Local Government, 13th of December 2006 press release]
AustriaAustria: “Vision 2050 on energy in buildings: The building stock of the year 2050 should be
in total over the entire life cycle (involves the production and operation of the building) free of any carbon emissions.”
[www.e2050.at/pdf/energie_gebauede.pdf]
NetherlandsNetherlands: “In the Netherland, the government and the construction sector aim at
achieving energy neutral new construction in 2020.”[Chiel Boomstra, Trecodome]
GermanyGermany: “ From current point of view future capable buildings are building architectural
demanding with high user comfort, minimal energy demand, optimized technological
equipment, meaningful integration into large energy supply systems as well as together
economical energy demand cover. Zero emission houses are the long-term objective.”[“Das 5.Energgieforschungsprogramm der Bundesregierung”, BMWA, 07/2005
Towards NZEB – examples of national requirements and roadmapsRef: REHVA 03/2011
NZEB
enegy supply
rod
uçã
o d
e e
ne
rgia
+
nZEB
En
erg
y S
up
ply
Definições/Metodologias/Desafios
energy needs
energy efficiency
demands reduction
ren
ew
ab
les fe
ed
necessidades energéticas
pro
du
ção
de
en
erg
ia
-
+
=
Energy Demand
En
erg
y S
up
ply
Como alcançar NZEB
•Sistemas passivos
•Iluminação natural
•Ventilação natural
• Optimização térmica da envolvente
• Optimização dos ganhos solares
enegy supplye
ne
wa
ble
s fe
ed
1º passo: reduzir as necessidades energéticas do edifício
• Iluminação eficiente
• Equipamentos eficientes
Tecnologias Estratégias
Sistemas Sistemas eficienteseficientes
Integração
urbana
energy needsenergy efficiency
demands reduction
ren
ew
ab
les fe
ed
1º passo1º passo1º passo1º passo22 22 º pa
sso
º pas
soº p
asso
º pas
so
Como alcançar NZEB
enegy supply2º passo: produção de energia
energy needsenergy efficiency
demands reductionre
new
ab
les fe
ed
1º passo1º passo1º passo1º passo22 22 º pa
sso
º pas
soº p
asso
º pas
so
Towards Net Zero Energy solar BuildingsTowards Net Zero Energy solar Buildings(October 2008 (October 2008 –– September 2013)September 2013)
SOLAR XXI NZEB Performance
-5000
-4000
-3000
-2000
-1000
0
1000
2000
3000
4000
5000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
En
erg
y (
kW
h)
PV supply car parking 2 PV supply car parking 1
PV supply building façade Electric consumption
Solar XXI - monthly electric energy consumption/PV energy supply
So
lar
Se
ttle
me
nt,
Fre
ibu
rg
Arc
hit
ect
ure
an
d c
on
cep
t: R
olf
Dis
ch
basis: source energy, non renewable (0.9, 2.7)
“plus energy”
0
50
100
150
200total source energy credits in kWh/m2a
Residential buildings
So
lar
Se
ttle
me
nt,
Fre
ibu
rg
Arc
hit
ect
ure
an
d c
on
cep
t: R
olf
Dis
ch
note: 100 kWh/m²y = 32 kBTU/ft” y
basis: source energy, non renewable (0.9, 2.7)0
0 50 100 150 200
total source energy consuption in kWh/m2aPlus Energy Settlement
Kleehäuser Freiburg Kraftwerk B
R128 ÉCOTERRA
Res
iden
tial
bu
ildin
gs
LEAF HOUSELIMA
GREEN TOMORROW
Non-residential buildings
ENERPOS ALDO LEOPOLD NREL RSF
MERIDIAN PIXEL
Towards Innovation - Towards NZEB
sapa-s
ola
r
BIPVPCM
www.glassx.ch
BIPV-T
ex. Canada
Towards Innovation - Towards NZEB
cooltower
P. Torcellini NRELP. Torcellini NREL
Ground source heat pump
Heat recovery ventilators
Radiant slab
Solaire – Battery Park City, NY: 33 kWp USGBC LEED – Gold
Architect: Cesar Pelli
ARCHITECTURAL INTEGRATION CHALLENGE
Cortesy
Bahrain World Trade Center
Sigma House
BRE Innovation Park
ARCHITECTURAL INTEGRATION CHALLENGE
Innovation_Park/InnovParkBrochure2012.pdf
OBRIGADO
