Hawaii to use cold ocean water for A/C

Joining Toronto and Stockholm, Hawaii is soon going to be cooled by cold water from the depths of the ocean.  Honolulu Seawater Air Conditioning LLC is installing seawater cooling in 40 buildings before 2012 when the first ones go live.  The deep sea water is transported through the buildings to cool them instead of taxing the energy grid during peak hours in order to keep the air conditioning running.  Hawaii’s energy is particularly expensive, so this will mean a great deal to the island.  The wastewater is returned to the ocean at a depth where that temperature of water is natural and will not be harmful to the aquatic life.  See more photos and an arial map at Inhabitat.