TXL+ An energy-plus city
Future use concept of the Berlin Tegel Airprort
Design Meinhard von Gerkan with Stephan Schütz and Nicolas Pomränke
Project leader Clemens Kampermann
Design team Clemens Ahlgrimm, Anna Liesicke, Jochen Sültrup, Michael Reiss
Client Land Berlin
Airport Berlin Brandenburg Willy Brandt
aac Academy for Architectural Culture
Concepts for an "energy-plus city"
Terminal, concept for future use
Urban metamorphosis – Natural landscape structuring
Architectural Metabolism – an urban organism
Contours of urbanity and sustainability
Life – work and density
A project of the architects von Gerkan, Marg and partners and aac Academy for Architectural Culture (aac) www.aac-hamburg.de
While mainly pragmatic and simple measures are proposed for the exploitation of the existing site, with as rapid an implementation as possible, the aim of the energy-plus-city of Tegel is to act as a planning model for the future that conforms with the highest architectural, energy and social requirements. The general change of paradigm here is not however a matter of optimizing buildings technically. The new city must generate new forms of living through density and functional flexibility that are structurally conducive to the optimum utilization of energy.
As a strip of land defined by the two existing runways, Tegel has a powerful symbolic aura and high recognition value. At the same time, the clearly defined boundaries of the site set markers for a strategy countering land-devouring urban sprawl by means of a compact, high-density urban structure with an excellent quality of life. Urban density is one of the basic features of TXL+ planning.
Putting it into practice has the following benefits:
- reducing traffic
- optimizing the surface:volume ratio per inhabitant
- reducing sealing
- releasing large open spaces (crops, agriculture, returning to nature)
- better-knit social structures, creation of urban quality
- better economic utilization of public infrastructure
- concentration of public institutions
This involves not so much a specific ideal density value e.g. in terms of the floor-space index, as a spatial, social and functional density viewed principally in the context of ist architectural and atmospheric quality. This concept allows for structurally differentiated answers that produce a range of living environments that are nonetheless all high-quality.
Functionally open-ended building structures
A further strategy of sustainability is to create functionally open-ended structures instead of functionally predefined buildings.
Longterm, the flexibility resulting from that is as beneficial for energy consumption as for the quality of life in the new city, producing:
- an appreciable lengthening of the life of buildings, as little or no conversion / new-build work is needed for a change of function
- a functional mix, creating urban quality in the process
- the intermeshing of professional and private spheres, further reducing traffic
Along with sustainability of urban development, the buildings themselves need also to contribute to sustainable construction. To this end, a "triple-zero" strategy is pursued, constructing buildings that:
- need no energy to operate on an annualized basis (zero energy)
- give off no harmful emissions (zero emissions)
- are completely recyclable (zero waste)
This strategy enables the whole range of current technical solutions to be exploited, while at the same time making clear that sustainable building is possible only on the basis of high-quality urban and architectural planning.