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Sustainable green buildings

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Chanette Kristensen

on 6 November 2017

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Transcript of Sustainable green buildings

Concept of Passiv-
and Activhouse

Danish buildings

The Danish way to sustainable buildings

Passive house principles

Active houses


Film om Green Lighthouse
- evt beskrivelse
We need to save energy...
Why is building energy
demand important?
EU’s Climate- and Energy plan 2008
20% reduced CO2 emission by 2020
20 % sustainable energy by 2020 (in Denmark 30%)
20% reduced energy consumption by 2020

Energy consumption
for domestic heating
The Danish way to
sustainable buildings
The development of maximum allowed heating for new buildings in Denmark
Other important private initiatives
Passive houses (first Danish projects in 2005/2006)
Active houses (first Danish project finished in 2009)
DGNB-certification (first Danish projects started in 2012)

None of the above are included in the Danish legislation!

Active house
Active House Vision
Passive Houses - The Comfort Houses
The Comfort houses - The Cube

Trias Energetica

Design principles of the Active House
- does sustainability affects the architecture?
UCN Global office - Vietnam
Asia Director

René Martin Larsen
Architectual Technologist and Construction Manager MAK
Executive MBA

Approximately 40% of our energy consumption
comes from buildings
Source: Michael Waibel, University of Hamburg

Source: Michael Waibel, University of Hamburg

Source: Berkeley Lab

Source: Glass for Europe

In September 2012, the government approved the Vietnam Green Growth Strategy, targeting an 8% to 10% reduction in greenhouse gas emissions by 2020 compared to levels recorded in 2010.

The development has been driven by
Private innovation
Demonstration projects
Overall a great interest within energy savings and energy optimization

Comfort House – passive house

Home for life – active house

Passive house
Passive house principles
A well insulated house, which keep the heat inside and thereby minimizes the demand for energy

A comfortable house with good indoor air quality

The principles in passive
house design
1. Minimization of heat loss

2. Optimization of the heat gains

3. Optimization of active systems (heat recovery)
Passive house criterions
and recommendations
Passive house criterions:
Demand for space
heating/cooling: 15 kWh/m2 year (net m2)
Primary energy demand: 120 kWh/m2 year(net m2)
Air tightness: 0,6 h-1 v. 50 Pa

Passive house recommendations:
Heat load: max: 10 W/m2 (air heating)
Over temperature: max: 10 % > 25°C
Window U-value : max: 0,80 W/m2K

Active House is a vision of buildings that create healthier and more comfortable lives for their users without impacting negatively on the climate and the environment – thus moving us towards a cleaner, healthier and safer world.

Buildings that gives more than they take...

Contributes positively to the energy
balance of the building

Creates a healthier and more
comfortable life for the occupants’

Has a positive impact on the

DGNB puts sustainability on formula

DGNB is a voluntary system, which was originally developed in Germany

The system is based on the building's life cycle and the materials used for the building


Based on a holistic and flexible approach

What is included in DGNB?
The DGNB system assesses sustainability from 6 overall criteria

The site quality is assessed separately

One score is given for the building and one score for the site

The DGNB-GB have been adjusted to Danish standards and legislation

The first Danish consultants were educated in the summer of 2012

The Danish version of The DGNB system includes 49 assessment criteria

The future of DGNB-DK
DGNB was chosen between LEED, BREEAM and HQE

DGNB-DK is now the prefered standard for new sustainable buildings in Denmark

Green Building Council Denmark aims for DGNB to become mandatory

Some of the first certified passive houses in Denmark (www.passiv.de)

10 single-family houses
Single storey
169 m2 living area

Passive measures
Compact building form - square

Heat accumulating concrete core
Relatively large windows facing south, east and west - fewer north

Overhang - shades for the hot summer sun

Active Houses
Specification and demonstration
Sunlight House, Austria
Home for life, Denmark
Jadarhus, Norway
Lighthaus Beaconsfield, Canada
Aktivnyi Dom, Russia
Source: Mikkel Skott Olsen, VELUX A/S

Active house - Home for Life
Home for Life produces more energy than it consumes. With an energy surplus of 9 kWh/m2/year, it takes approximately 40 years for the house to generate the same amount of energy that was used to produce its building materials.

At that point, the house will have returned more to nature than it consumed.

A solar heat pump and 7 m2 solar collectors generate energy for heating and hot water

50 m2 solar cells generate more electricity than the home consumes.

Solar Heat Pump
Solar thermals
Passive principles are still widely used even though it is an active house

Bag Green Lighthouse står en styregruppe med Københavns Universitet, Universitets og Byggestyrelsen under Ministeriet for Videnskab, Teknologi og Udvikling, VELUX, VELFAC og Københavns Kommune.
Huset er tegnet og bygget af et konsortium bestående af Christensen og Co. Arkitekter, Hellerup Byg og COWI.
Areal: 950 m²
Huset rummer 19 arbejdspladser og har 15.000 brugere om året
Opvarmningsbehov: 14 kWh/m²/år
Ca. 50% af husets energiforbrug forventes af blive dækket af vedvarende energi

Green Lighthouse
Functions - Green Lighthouse
Strategies for the building - Green Lighthouse
Natural ventilation - Green Lighthouse
Art in the building - Green Lighthouse
Spejle reflekterer lyset fra solen. Herved opstår en cirkel. Lyset rammet spejlene fra den ene ende, således at der kommer en ny lysplet i cirklen ca. en gang hvert minut. Pletterne forsvinder igen på samme måde. Placeringen af cirklerne på gulvet vil variere efter årstid.

- new Danish Certification System
Single storey
169 m2 living area

Compact building form - square
Heat accumulating concrete core
Relatively large windows facing south, east and west - fewer north
Overhang - shades for the hot summer sun

The Cube - passive measures
Full transcript