09 Feb '12, 3pm

Finding Energy Advantages Six Feet Under

Finding Energy Advantages Six Feet Under

Ball State University A geothermal heat pump uses the earth as a heat source when operating in heating mode in the winter, and as a heat sink when operating in cooling mode in the summer. To take one calorie of heat out of a hot classroom in the summertime, or to add a calorie to a cold space in the winter, Ball State University’s boilers , all from the middle of the last century, have to burn one calorie of coal. But in a few months, the university’s heating and cooling system will become seven times more efficient by dumping heat or gathering it, depending on the season, from the dirt around six feet under the campus. It seems that universities are competing more and more these days in the efficiency of heating and cooling. New York University recently unveiled a heating and cooling system that it says is 90 percent efficient. Ball State, in Muncie, Ind., says its techno...

Full article: http://green.blogs.nytimes.com/2012/02/09/finding-energy-...

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