Orly Airport, one of the two large airports serving Paris, has announced plans to use geothermal energy to slash its heating bills, according to a recent Agence France-Presse news release.
Plans call for two shafts of about one mile deep to be drilled on the perimeter of the airport to access a water table warmed by geothermal heat. The water will emerge at the surface at some 165 degrees F and be injected into the airport heating system. It will be returned into the ground at a temperature of 113 degrees F.
The project is projected to cost more than $17 million. The Orly-Quest terminal, the airport's Hilton Hotel and two business districts will be included on the system by 2011. Airport administrators hope the geothermal energy system will meet a third of the airport's heating needs and save some 7,000 tons (about a third) of its annual CO2 emissions. Two neighboring towns already use geothermal energy to meet some of their heating requirements.