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.