User: con fuoco

While on the subject...very neat cooling idea

On: 100th Anniversary of Air Conditioning

http://www.utilities.cornell.edu/LSC/Mailer/HowLSC Works.htm

Basically, Cornell U uses Cayuga Lake as their heat exchanger. They run their campus cooling water down to the lake where it's heat is removed. It appears that this system doesn't require a refrigerant/compression/expansion cycle at the campus -- the cooling water is cold enough to do the job.