Active cooling would work as well as active heating so you don't need to worry about carnot efficiency. Start it up and then keep it just hot enough by pumping a liquid, under controlled rates, with an appropriately high boiling point and decent specific heat and conductivity through the system at 1200C. Liquid metal of an appropriate amalgam or even some liquid salts would do.
I wouldn't be surprised if someone has suggested this before. On Fri, Oct 17, 2014 at 6:32 PM, Paul Breed <p...@rasdoc.com> wrote: > Closing the loop with a hot side temperature of 1200C and a COP of 3, is > right on the very edge of possible... > > You need close to 50% of theoretical carnot efficiency... > > 100C cold 1200C hot gives carnot of 0.76 > > Best possible heat to mechanical work.. (3*.76) = 2.28 > Best possible Work to electricity 0.95 > > gives 2.116 so to break even close the loop and have ZERO excess energy > you would need to get to 46% of carnot > Commercial large scale power plants don't get to 46% of carnot.... > > Using something really simple like thermo electric (seebeck) generator > would require a COP of 20.2 to get to break even > assuming that electrical conversion efficency was 99% > > > > > > > > > > > On Fri, Oct 17, 2014 at 8:02 AM, Daniel Rocha <danieldi...@gmail.com> > wrote: > >> Rossi had now shown that he can get COP>3. Why doesn't he use that and >> build an ecat out of that? Show it inside a black box with some extra >> output, say 500W for several months. It will certainly destroy any doubt >> concerning his invention and will not reveal any trade secret he has. >> >> -- >> Daniel Rocha - RJ >> danieldi...@gmail.com >> > >
