Overview of examples in Nearly Zero Energy Buildings (NZEB) and definition requirements in the Energy Performance of Buildings Directive (EPBD recast).

1. NEARLY ZERO ENERGY
EXEMPLAR BUILDINGS
IRENA KONDRATENKO
Consultation Forum for Sustainable Energy
in the Defence and Security Sector
14th January 2016, Brussels

2. WHAT IS
NEARLY ZERO
ENERGY BUILDING ?

3. Directive 2010/31/EU (EPBD recast)
Article 2
“A building that has a
very high energy performance”
and

4. “The nearly zero or very low amount of
energy required should be covered to a
very significant extent by energy from
renewable sources, including energy from
renewable sources produced on-site or
nearby”.

5. TIMING?

6. Article 9
“Member States shall ensure that by
31 December 2020 all new buildings
are nearly zero-energy buildings;
and after 31 December 2018, new
buildings occupied and owned by
public authorities are nearly zero-
energy buildings”.

7. Member States shall furthermore “draw
up national plans for increasing the
number of nearly zero-energy buildings”
.. and

8. “following the leading example of the
public sector, develop policies and take
measures such as the setting of targets
in order to stimulate the transformation of
buildings that are refurbished into nearly
zero-energy buildings”.

10. EXEMPLAR
NEARLY ZERO ENERGY
BUILDINGS
.. Typical features

11. NEW & DEEP RENOVATIONS
VARIETY OF FUNCTIONS & EU LOCATION
INSPIRATIONAL / LEADING EXAMPLES
(beyond current national building legislation)
LONGER TERM VISION (life cycle costs)

12. HIGHLY EFFICIENT
FACADE & TECHNICAL SOLUTIONS
(incl. renewables)
ATTENTION TO OPTIMIZED BUILDING
MANAGEMENT & USE
OPTIMIZED CONSTRUCTION & RENOVATION
PROCESS (prefabrication, new business models..)
FINANCING (higher upfront investment,
ESCO+EPC..)

13. LATEST TENDENCIES
UPSCALING: DISTRICT SOLUTIONS
(heating, cooling networks + renewables)
INTERACTION
(buildings + e-storage + smart grid
+ mobility + internet of things)
ENERGY PLUS BUILDINGS (exceed own demand)

14. EXAMPLES

15. OFFICE
AEROPOLIS II
BRUSSELS

16. 2008-2010
7388m2
Very low heating
demand 14kWh/m2.y

17. Modular Facade
Flexibility!
Thermal + acoustic
insulation
Attention to reducing
summer overheating

20. Techniques:
Nigh time ventilation
High thermal mass
Ventilation with heat
recovery
All installations in
technical floor
Geothermal heat
exchangers
Energy monitoring 5y

21. APARTMENTS
INNSBRUCK, AT
334 apartments
Heating demand:
15kWh/m2.y
Primary energy:
112kWh/m2.y

22. High energy performant
facade
Very low heating &
maintenance costs
User friendly
installations
1050m2 Solar thermal
panels + wood pellets +
gas boiler
Energy monitoring
(performance check vs
calculated, including
indoor air quality)

23. Periferal underfloor heating

24. COMMUNITY CENTRE
LUDESCH, AT
3135m2
Mixed function
Patio with semi-
transparent BIPV
(electricity + shadow)
Solar thermal panels
(60m2, roof)
Timber structure

25. Heating demand: 14kWh/m2.y
Cooling demand: 7,5kWn/m2.y

26. Off-site prefabrication

27. Technical room in the basement
4 central ventilation groups
Ventilation with heat recovery
Attention to indoor-air quality: relative
humidity sensors in rooms
External shading (prevention overheating)

28. RENOVATIONS

29. RENOVATION
HOUSE/NEIGHBOURHOOD
ROOSENDAAL, NL

30. 1958-1966
First large-scale highly
energy efficient
renovation (134 houses +
show-house)
Heating demand:
25kWh/m2.y
User-occupied during
renovation
Total renovation = 15days
Strong renovation process
coordination &
communication

31. Total prefabrication
facade (5days) & roof (1day)

32. Solar thermal panels on the
prefabricated roof
1 year energy monitoring,
including user-satisfaction

33. All techniques in the attic:
Gas boiler + balance ventilation with heat recovery

34. RENOVATION
SCHOOL
BUCHLOE, DE

35. 8903m2
Heating demand:
16kWh/m2.y
Primary energy
demand: 60kWh/m2.y
Concrete existing
construction
& new timber
prefabricated facade
+ interior improvements
(2 phases)
Very short time for
renovation

37. RENOVATION
SCHOOL
NEUMARKT, AT
1978/2011

38. 3526m2
Well insulated
perfabricated timber
facade modules
Biomass (pellets) & PV
Central mechanical
ventilation with heat
recovery
Heating demand
reduction:
160kWh/m2.y to
14kWh/m2.y
91% reduction

39. ..highlights to successful NZEB
ENERGY EFFICIENCY FIRST PRINCIPLE !
then
RENEWABLES COVER MINIMIZED ENERGY DEMAND to
extend feasible

40. ..highlights to successful NZEB
DECISIONS BASED ON LONG TERM VISION
ACHIEVING HIGH QUALITY REQUIRES OPTIMIZED
CONSTRUCTION PROCESS & COOPERATION
USE OF PREFABRICATION FOR
SHORTER ON-SITE WORKS

41. ..finally
KNOW THE BUILDINGS:
GATHER ENERGY CONSUMPTION DATA
(before/after)
COMMUNICATION TO USERS
&
GOOD BUILDING MAINTENANCE MATTER!