Nederland Renewable Energy Project

http://www.renewableenergyworld.com/rea/news/article/2010/03/cool-collaboration-mines-forgotten-technologies-for-huge-energy-savings While I would prefer geothermal heating & cooling, the Ned Library is going with evaporative cooling.  Hopefully they will avoid direct coolers to avoid mold on the books!  From the article: There are three types of evaporative-only coolers: direct, indirect, and 2-stage. Direct coolers use a media that evaporates the water directly into the air. Indirect coolers use two air streams to avoid adding moisture to the cooled air, providing cool, dry air.  2-Stage systems (also known as direct-indirect units) use a direct media as well as an indirect heat exchanger, thereby creating cooler air at a lower temperature and lower humidity level as compared to direct-only coolers.