On 5/1/12 5:51 PM, Jim Wilkins wrote:
Wasn't it you who pointed me at "Steam Tables" by Keenan, Keyes, Hill
and Moore? In the appendix (page 139 in my edition) there was a plot of
experimental data that eventually led me to this Wikipedia article that
(also) made my head hurt, but that I found helpful:
After working through that and a couple of other articles, I wrote a
software model which let me plot calculated vapor pressures. You can see
my vapor pressure plot contrasted with an Ideal Gas (air) at:
which nicely matches the experimental data plotted in "Steam Tables". It
actually turns out that water behaves like an Ideal Gas (with a quite
large R constant) only beyond its critical point.
Since my design is aimed at third world 24/7 use, I worked out a way to
make the reactor tolerant of "wet" hydrogen - primarily because I wanted
the generator to be independently capable of producing its own hydrogen
on the fly. If I hadn't been able to do that, the CaCl would have been a
good way to go.