Nearly Zero Energy Exemplar Buildings

NEARLY ZERO ENERGYEXEMPLAR BUILDINGS

IRENA KONDRATENKO

Consultation Forum for Sustainable Energy

in the Defence and Security Sector

14th January 2016, Brussels

WHAT IS NEARLY ZERO

ENERGY BUILDING ?

Directive 2010/31/EU (EPBD recast)

Article 2

“A building that has a

very high energy performance”

and

“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”.

TIMING?

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”.

Member States shall furthermore “draw

up national plans for increasing the

number of nearly zero-energy buildings”

.. and

“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”.

EXEMPLAR NEARLY ZERO ENERGY

BUILDINGS

.. Typical features

NEW & DEEP RENOVATIONS

VARIETY OF FUNCTIONS & EU LOCATION

INSPIRATIONAL / LEADING EXAMPLES

(beyond current national building legislation)

LONGER TERM VISION (life cycle costs)

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..)

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)

EXAMPLES

OFFICE

AEROPOLIS II

BRUSSELS

2008-2010

7388m2

Very low heatingdemand 14kWh/m2.y

Modular Facade

Flexibility!

Thermal + acousticinsulation

Attention to reducingsummer overheating

Techniques:

Nigh time ventilation

High thermal mass

Ventilation with heat recovery

All installations in technical floor

Geothermal heat exchangers

Energy monitoring 5y

APARTMENTS

INNSBRUCK, AT

334 apartments

Heating demand: 15kWh/m2.y

Primary energy: 112kWh/m2.y

High energy performant facade

Very low heating & maintenance costs

User friendlyinstallations

1050m2 Solar thermalpanels + wood pellets + gas boiler

Energy monitoring (performance check vscalculated, includingindoor air quality)

Periferal underfloor heating

COMMUNITY CENTRE

LUDESCH, AT

3135m2

Mixed function

Patio with semi-transparent BIPV (electricity + shadow)

Solar thermal panels (60m2, roof)

Timber structure

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

Off-site prefabrication

Technical room in the basement4 central ventilation groupsVentilation with heat recoveryAttention to indoor-air quality: relativehumidity sensors in rooms

External shading (prevention overheating)

RENOVATIONS

RENOVATION

HOUSE/NEIGHBOURHOOD

ROOSENDAAL, NL

1958-1966

First large-scale highlyenergy efficientrenovation (134 houses + show-house)

Heating demand: 25kWh/m2.y

User-occupied duringrenovation

Total renovation = 15days

Strong renovation processcoordination & communication

Total prefabricationfacade (5days) & roof (1day)

Solar thermal panels on theprefabricated roof

1 year energy monitoring, including user-satisfaction

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

RENOVATION

SCHOOL

BUCHLOE, DE

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

RENOVATIONSCHOOL NEUMARKT, AT1978/2011

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

..highlights to successful NZEB

ENERGY EFFICIENCY FIRST PRINCIPLE !

then

RENEWABLES COVER MINIMIZED ENERGY DEMAND to

extend feasible

..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

..finally

KNOW THE BUILDINGS:

GATHER ENERGY CONSUMPTION DATA

(before/after)

COMMUNICATION TO USERS

&

GOOD BUILDING MAINTENANCE MATTER!