keoto | Zero Emisson HighRise Tower, Grosspeter

Zero Emisson HighRise Tower, Grosspeter

Project: Low Ex – Zero Emission, Grosspeter Tower Basel
Period: October 2010 – Dezember 2010
Phase: Energy-Concept
Characteristics: Zero Emission High Rise tower
Architect: Degelo Architekten, Basel


This work consisted of a study on the potential to make the operation phase of the Grosspeter project CO2-free.

The architectural components as well as the building engineering systems were analyzed according to the Second Law of Thermodynamics and were put together in a single building concept. The exergy concept provided us with a tool with which the productivity of a system or material stream could be maximized. Furthermore, the actual losses can be calculated. This method can assist in solving engineering problems, especially when the exergy concept is coupled with economic values, that is, when “thermo-economic” methods are applied.

The relation Exergy + Anergy = Energy can often be found in the literature, where “anergy” designates the portion of the total energy that cannot be used.”

In the context of this project, applying the exergy concept would allow low temperature heating systems and high temperature cooling systems to supply the building’s needs while avoiding CO2 emissions during operation. In order to study the area’s potential, the system was outlined, the yearly consumption was simulated and the necessary amount of PV panels was determined.

The study also found that the electricity demand for ventilation could be decreased by using sensor-controlled ventilation for the inlet and outlet air and implementing efficient fans, thus further reducing the total electricity consumption. This reduced electricity demand can be completely supplied by electricity production from renewable resources, so that the building operation does not generate CO2 emissions over the course of a year – a ZERO EMISSION BUILDING is thus conceived.

Publication: NZZ 24.2.2013 Keoto Highriser Basel