Well, I think its impressive. True, just because you produce more energy than you consume does not necessarily mean you can extract it (esp with a heat exchanger). Since the Carnot Eff is 50 percent (MAX) if I produce 3 thermo-watts more than I put into the system I still won’t have enough power to make a decent cup of coffee. Still, the Wright brothers only flew 100 ft and 50 years later we were flying at Mach.
