The Internet supplier Bahnhof’s Thule facility in central Stockholm is probably Sweden’s most energy-efficient data centre. With a cooling system that has been linked both to Stockholm Exergi’s district heating network and district cooling network, Bahnhof has created a technical solution that combines financial benefit with sustainability and very high operational reliability. The excess heat is recovered. At the same time the facility’s excess cooling capacity is used to meet the needs of other district cooling customers whenever Thule does not need the capacity.
Bahnhof Thule’s premises were initially built to house the insurance company Skandia’s data centre. The place is the same, but the circumstances have changed a lot. The new data centre requires far more energy than the facility that previously occupied the premises. Thule comprises three separate halls that have been built with energy efficiency and recovery as primary considerations.
Bahnhof has taken a conscious decision to build up expertise on how to design and build data centres, based on several new ideas concerning IT operations. One philosophy that is unusual in the industry is that Bahnhof likes to be close to its customers physically, with facilities in central locations in the middle of the city.