home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!spool.mu.edu!agate!ames!pacbell.com!tandem!zorch!fusion
- From: Jed Rothwell <72240.1256@compuserve.com>
- Subject: Sounds plausible to me
- Message-ID: <921230195309_72240.1256_EHL73-1@CompuServe.COM>
- Sender: scott@zorch.SF-Bay.ORG (Scott Hazen Mueller)
- Reply-To: Jed Rothwell <72240.1256@compuserve.com>
- Organization: Sci.physics.fusion/Mail Gateway
- Date: Wed, 30 Dec 1992 20:59:54 GMT
- Lines: 68
-
- To: >INTERNET:fusion@zorch.sf-bay.org
-
- Tom Droege asked me:
-
- "I would like to remind Jed Rothwell that the Nickel cell heat went away with
- a Mercury bubbler between the cell and the catalyst. You tell me how the
- cell knew the catalyst was there. Perhaps it is an ESP experiment!"
-
- ...and Chris Phoenix came back with an interesting and plausible idea that
- might answer the question:
-
- "Maybe the cell knew the *bubbler* was there, not the catalyst. I don't know
- how a mercury bubbler is constructed, but it seems there must be a
- gas-mercury interface on both sides of the bubbler. I've heard that mercury
- evaporates slowly at room temperature..."
-
- Right. Maybe you should try 6 or 8 different kinds of bubblers. I think
- people use oil bubblers, but that is a definite no no with a nickel cell. You
- want a viscous, non-organic liquid. I would try no bubbler (that is, a tube
- directly from the cell to another cell with a recombiner in it). If a person
- was to work on that particular question, full-time for 6 months or so, I am
- pretty sure he would find the answer. I would start with a whole series of
- experiments, and find out a lot more about bubblers than I now know, which is
- zero. I would also try exposing a working, open cell to mercury fumes, to see
- if that kills the reaction. It does not take much to murder this reaction. If
- these cells are ever commercialized, they will have to be sealed like
- rechargeable batteries or hard disks.
-
- I don't know why nickel cells don't work well with recombiners. I don't like
- recombiners anyway, they cause endless trouble, and when they fail they can
- cause grave danger. I would never fool with one at this stage. If anyone out
- there is determined to use a recombiner with a nickel cell, wait a couple of
- weeks until I reach Bob Bush and ask him what kind he uses. Why reinvent the
- wheel? Find out what works, you can save months of heartbreaking wasted time.
-
- This raises a Very Important Point: there is a lot to be learned here.
- Furthermore, we cannot go chasing off after every weird anomaly that crops up
- along the way. Why does a mercury bubbler + recombiner poison a nickel cell?
- Who knows? Is it worth the time and effort required to find out? Nope. I
- don't think so. Maybe later, after we all get 10 times input excess heat.
- Right now, the best thing to do is to make an open nickel cell that works
- splendidly: way, way above I*V. After you wring it out, then go back to
- recombiners, or -- better yet -- fuel cells. In all cases, learn from what
- other people have done, don't waste your time trying to find a recombiner
- that works if other people already know.
-
- I just heard from another nickel experimenter who reports "substantial
- recombination" on the cathode, along with substantial excess heat above I*V.
- Actually, if we can most of the gas to recombine on the cathode every time
- with assurance, it would be a great thing: we will not need to worry so much
- about explosive gas. Notoya and others believe that the reaction occurs
- midway through the electrolytic decomposition of water, during the formation
- of an intermetalic intermediate compound. If they are right, then by time you
- get free hydrogen and oxygen, the reaction is over, you might as well put the
- two back together then and there. They say there is no need to build up a
- supply of free hydrogen at the metal surface or near surface, and you
- certainly do not want free oxygen in the cell.
-
- My hunch is that recombination on the cathode occurs with certain cathode
- geometries, but not with others. Perhaps it is also a function of the cathode
- surface temperature. I do not have a handle on the problem.
-
- - Jed
-
-
- Distribution:
- >INTERNET:fusion@zorch.sf-bay.org
-
-