Germany, Berlin 

TXL+ Berlin Terminal, concept for future use

TXL+ Berlin Terminal, concept for future use TXL+ Berlin Terminal, concept for future use TXL+ Berlin Terminal, concept for future use TXL+ Berlin Terminal, concept for future use TXL+ Berlin Terminal, concept for future use TXL+ Berlin Terminal, concept for future use TXL+ Berlin Terminal, concept for future use      

Entwurf Meinhard von Gerkan mit Stephan Schütz
Mitarbeiter Clemens Kampermann, David Schenke, Yu Tsai
Tutor Nicolas Pomränke

A project of the architects von Gerkan, Marg and partners and aac Academy for
Architectural Culture (aac)



TXL+Berlin Masterplan

Concepts for an "energy-plus city"
Urban metamorphosis – Natural landscape structuring
Architectural Metabolism – an urban organism
Contours of urbanity and sustainability
Life – work and density
Courtyard houses

Passive Measures
The climatic shell of the building follows a concept of "house-in-house". The solid walls of the conference hall form the climatic shell and therefore the threshold between inside and outside. The glass lobby surrounding the hall forms a climatic buffer, extending the area of use during interim seasons. The solid cores work as storage mass, decelerating change in temperature during hours of high solar impact.

Active Measures
Mechanical ventilation guarantees highest air quality inside the conference hall. It allows for 80% of the energy used for heating to be reclaimed by preheating cold fresh air ventilated in from outside. PCM storage units are kept at a reasonable dimension due to the temporary nature of use of the building. Additional to the PCM storage, used for heating energy and cooling, the benefits of a cold water storage surrounding the structure can be activated when needed. 

Energy Concept
Not all parts of the original building fulfil nowadays standards of energy efficiency. Energy requirements can be reduced, however, by means of defining separated zones and their respective needs for temperature comfort. The required energy can be delivered by renewable sources such as photovoltaics on the roof, providing an overall neutral balance between energy generated and energy used.

The Belt of Green Energy
All tenants of the Terminal building are tied together with the Belt of Green Energy a, media experience informing on local energy generation and use, providing transparency and education. The large cantilevered roof of the conference hall prevents unwanted solar gain in summer. Its horizontal surface is shaped by a number of small pyramids carrying photovoltaic elements over efficient panels of insulation. The transparent north facing elements allow glare free skylight into the structure. In summer the glass curtain wall can be opened entirely to allow a maximum of natural ventilation. Solar gain in winter preserves the structure from frost. Evaporative cooling from the water basins surrounding the conference centre influences the micro climate of the entire TXL+ courtyard.

Development Phases TXL+
The development of TXL+ is divided into phases taking into account the financial and energy efficiency of a sustainable concept of use. In a number of steps the property is freed from last minute temporary additions and air traffic specific equipment. Sources of renewable energy are added to neutralize the overall energy balance.

A solar farm, adjacent to the former terminal, will provide 140% of the energy required at this stage of the development alone. Areas for commercial and industrial development are expanded before the former terminal can finally take on its additional function as the nucleus and interchange for all the habitants of the entire TXL+ development.