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When energy efficiency becomes Olympic

With the construction of the "Maison Olympique", the International Olympic Committee (IOC) is setting itself ambitious goals in the context of sustainable development. Various measures are being taken to achieve this goal, including a pumping station installed by Bouygues Energies & Services InTec.

The new headquarters of the IOC will be inaugurated in 2019. As part of its ambitions for this building, the IOC is striving for an architecture that emphasises the strong values and symbols of the Olympic movement in order to unite its 600 employees under one roof and make use of the latest sustainable technologies. A future intelligent building, for which Bouygues E&S InTec has also been commissioned to strive for energy efficiency in terms of light generation and shading control, will also require electrical installations and well-designed building services engineering. As the IOC's future facilities are quite energy-intensive, the energy-saving measures were diversified with the help of solar panels, the collection of rainwater, the installation of heat pumps and, in particular, its own pumping station.

 

A submarine pipe to transport the seawater

The pumping station will draw water from Lake Geneva. The water will not only be used to cool the building, but also to heat it.

In this context, Bouygues E&S InTec's technical concept for extracting the water from the lake, providing and installing the hydraulic equipment was selected. The principle consists of a strainer (filter) and a sea pipe, which collect the lake water at a constant temperature (about 5 degrees) at a depth of over 60 metres and bring it to the pumping station, which is buried near the shore. Pumps and a filter system are installed in the station. The pipes laid in the field connect the pumping station with the IOC building to ensure the production of cooled and heated water.

In fact, the order recently went through a very impressive phase. After assembling and welding the pipes - with an amazing length of 1.2 kilometres (!) - in the Grand Canal in Noville, this extraordinary sea convoy crossed the lake to be transported to Vidy, where a huge pipe with a diameter of 50 centimetres was connected to the pumping station and then sunk by gravity. This task was carried out in collaboration with TSM-Perrottet AG, which specialises in subsea work.

Commissioning is scheduled for August 2018, after all technical tests have been completed.

The advantages of a placement on the lakeshore

The water of the lake is a precious resource. The proximity of the site guarantees optimal use for heating and air conditioning of the building. Thus, the well-being of the employees of the future headquarters of the IOC is ensured, among other things, by the technical core of this plant, which meets the desire to use renewable energy in all respects. By the way, the pumping station system is already widely used by neighbouring companies: IMD, Nestlé, EPFL and the Bellerive outdoor pool are already equipped with it.

 

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Maison olympique