Aquifer Thermal Energy Storage for district heating and cooling: Stockholm Arlanda Airport

Project information

Index: 0992C3
Priority:2: Environment and risk prevention
Sub Theme:Energy and sustainable transport
Location SWEDEN ÖSTRA SVERIGE Stockholm Stockholm Start/End date of the practice
Start: 2009-06-01
End: ongoing

Topic of the practice

Aquifer Thermal Energy Storage system

Good Practice Information

The world’s largest energy storage unit − the aquifer that supplies cooling and heating for Stockholm-Arlanda Airport − has been in service since the summer of 2009. From now on, all cooling of airport buildings, including the terminals, will come from the aquifer. Arlanda consumes as much energy as a city of 25,000 people. Areas as large as one hundred European football pitches need to be cooled in summer and warmed in winter. During the summer, the aquifer supplies cooling to Stockholm-Arlanda’s buildings while at the same time storing heat. In the winter, this stored heat is used in the ground heating system at the airport’s aircraft parking stands and to pre-heat ventilation air in buildings. The aquifer’s impressive size, in combination with excellent energy efficiency and the fact that it is easy to visit (located at an international airport) makes it an excellent demonstrator. It also shows the importance of a holistic approach to achieve a sustainable energy supply. Arlanda airport have the goal to be climate neutral (excluding transportation fuels) and energy efficient. The airport management, facility, and energy divisions, and also management and technical consultants were involved. The same concept is possible to use in new as well as in existing structures. The key is to involve all stakeholders, regardless of organisational affiliation, in the proximity of an aquifer.

Evidence of success

The aquifer will reduce the airport’s annual electricity consumption by 4 GWh (no longer needed for operation of electrical chillers) and its district heating consumption by around 15 GWh making a total of 19 GWh. The system efficiency is world class. No heat pumps are used and electrical chillers less than 100 hours per year, gives a SPF (seasonal performance factor) closer to 100.

Contact details to obtain further information on the practice

Oskar Räftegård

SP Technical Research Institute

Annex completed on: 03-25-2011

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