19 octubre 2015
It’s estimated that the U.S. fails to use more than half of the energy it generates — mostly because it escapes as waste heat. Scientists are now developing a new type of system to efficiently capture some of that lost heat. They have designed a surface that enhances low frequency thermal radiation, which is easier than higher frequencies to «harvest» directly out of the air and turn into usable DC electricity.
http://www.sciencedaily.com/releases/2015/10/151019104144.htm
