The point of the article is that (unlike people would expect) THERE IS a direct way how to convert mechanical energy to heat. It can be even more effective (in

The point of the article is that (unlike people would expect) THERE IS a direct way how to convert mechanical energy to heat. It can be even more effective (in theory) than heating via electricity from wind, because there is only one energy conversion (motion -> heat unlike motion -> electricity -> heat). Big downside is that heating with water brake is somewhat impractical and unexplored territory. However big plus of this approach is that you can make water brake with middle-age technology.