As in a solar thermal system, use molten salts such as sodium and potassium nitrate or a combination of the two.
It is cheaper to have 1000 thin molten salts pipes and a high pressure heat exchange, then 1000 high pressure steam pipes. On Thu, May 26, 2011 at 3:50 AM, Peter Gluck <peter.gl...@gmail.com> wrote: > Based on my experience with many thermal transfer agents for higher > temperatures I think water remains the unique choice . Mercury as used in a > process of converting cyclohexanol to cyclohexanone) is prohibitely > expensive and very toxic- while organic agents as Diphyl (diphenil oxide > plus diphenyl) will rapidly degarde in contact with a very hot surface and > this will lead to fouling. What other possibilities are in your opinion? > Peter. > > > On Wed, May 25, 2011 at 11:59 PM, Alan J Fletcher <a...@well.com> wrote: > >> At 01:24 PM 5/25/2011, you wrote: >> >> *HARD CURRENCY ENERGY*- how the thermal energy of the active core can be >> converted in electric energy in an economical way? >> >> I don't think that's going to (or needs to) happen any time soon --- it >> only delivers 500C (limited by the nickel powder degrading?) at 50 bar. >> Electrical conversion efficiency at that level is less than 20% (??) -- >> times the 6x factor is barely over unity. >> >> >> I'm probably too conservative there. 40% ? 60% ? >> (Way out of my expertise, anyway.) >> >> But the working fluid doesn't have to be water. >> I'm not sure that a http://en.wikipedia.org/wiki/Mercury_vapour_turbinewould >> get approval for domestic use, though !!!! >> > > > > -- > Dr. Peter Gluck > Cluj, Romania > http://egooutpeters.blogspot.com > >
