Environment
There is an ongoing work to limit Arlanda's negative impact on the environment. In an effort to save electricity, buildings at Arlanda use district heating with biofuels and district cooling with water from a nearby lake. The take off charges for aircraft are partly based on the environmental performance of the aircraft and Arlanda is experimenting with Continuous Descent Approaches and landings, often referred to as "green landings". Jet fuel is since around 2006 delivered by boat to Gävle and via train to Brista close to Märsta and from there through pipeline. Previously fuel was delivered by ship to Värtahamnen in Stockholm and then by trucks through Stockholm city to Arlanda. The airport also takes measures to promote the use of bio fuel in taxis operating to and from the airport.
One of the most interesting eco-friendly systems Stockholm Arlanda Airport uses is their unique heating and cooling system for their hangar, terminals, and other buildings on the airfield. There innovative system uses a series of wells which are linked to a large underground aquifer. The water from this underground source is plumbed up and into the facilities air system which controls the temperature of the air coming from the vents. In the summertime, the underground water remains cooler than the surface. This allows the terminals to be cooled off without using extra energy that an air conditioner would require. Then, in the winter months, the underground water remains warmer than the surface. The water is then plumbed to a control/heating unit which uses bio-fuel to heat the water to a temperature appropriate for warming up the buildings. This heated water is also used to heat pads of cement on the ramp and near the large hangar doors. This is a very efficient way to keep the doors and ramps clear of ice. After the water is run through the system, it is then all replaced back into the aquifer to be used again. The unique aquifer system is one of Arlanda's most defining environmentally friendly designs.
Read more about this topic: Stockholm Arlanda Airport
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