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Efficient air conditioning

posted by Jason Kottke   Sep 13, 2010

Engineers at the National Renewable Energy Laboratory in Colorado have devised an air conditioning unit that could use up to 90% less energy than a conventional unit.

The new, patented system abandons the power-hungry compressor-driven refrigeration process used in many domestic (and virtually all commercial) air conditioners in favor of a couple of high-efficiency pumps and fans. But it also uses water for evaporative cooling — a concept familiar to many people living in the arid West who have roof-mounted “swamp coolers.” Swamp coolers work well when the outside air is dry, as evaporating water carries away heat, cooling and moistening the air that is re-circulated into the house.

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