Take a look at Fig. 2.2.3 (about 2/3rds of the way down the page) on this website: http://www.spiraxsarco.com/resources/steam-engineering-tutorials/steam-engineering-principles-and-he at-transfer/what-is-steam.asp There is a very clear explanation below the Figure... This is the best reference and explanation I've seen so far...
***************** For all those who care to chime in, I'd like to know where you think the E-Cat is operating along the A-B-C-D line segments? Or NOT on any of those segments... ***************** -Mark