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
