home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!ames!pacbell.com!tandem!zorch!fusion
- From: Jed Rothwell <72240.1256@compuserve.com>
- Subject: I * V
- Message-ID: <921121164207_72240.1256_EHL48-1@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: Sun, 22 Nov 1992 04:12:24 GMT
- Lines: 93
-
- To: >INTERNET:fusion@zorch.sf-bay.org
-
- Hoping to pour oil on troubled waters, and not on a bonfire, let me say David
- Buehler and Steve Jones are right, most of the time Notoya left the control
- cell at lower power level than the CF cell, in order to compensate for power
- lost to electrolysis. However, I believe that from time to time she showed it
- to people, and disassembled it, and so on, and she adjusted the power to
- demonstrate other aspects of the system, so it is possible that Buehler
- observed it with different power levels at different times. On the last day,
- she and I were having a good time playing around with it. This is a hands-on
- demo after all, not a strict lab experiment. It is merely intended to give
- people a feel for the kind of results she is getting back at the lab.
-
- Some people have suggested she bring "a better calorimeter." I remind everyone
- that she is not allowed to schlepp a ton of lab equipment and computers into
- the overhead compartment on airplanes. If you want to see the real experiment,
- go to Hokkaido.
-
- Three more quick notes on this, and then let us drop the subject until Dec. 3,
- when we can run this mini-experiment again with thick, uniform, silver wires.
- First, the settling time for the glass jar is about 15 or 20 minutes, which is
- convenient, it lets you demonstrate a variety of different power levels.
- Second, when you adjust both cells to exactly the same power in (ignoring
- recombination) you see there is still a substantially higher temperature in the
- CF cell. Third, Notoya tossed the old silver wire, so she can't say how
- resistant it was, but she doubts very much that 6 cm of silver wire thick
- enough to be visable could possibly offer as much resistance as a 4 cm nichrome
- heater, which is what is in the cell. I doubt it too. In fact, I think the very
- suggestion is preposterous. I expect Buehler made some kind of error when he
- moved the alligator clips. I do *not* think he is kidding, or lying, I am sure
- he believes what he says. I suggest Bueler and Jones might want to run one more
- little mini-experiment, if they have 15 minutes to spare: measure the
- resistance of the thinnest silver wire you find (or see), and then measure the
- resistance of a 4 cm nichrome heater, and report back to us if they are the
- same.
-
-
- In my brief review of the light water work, I forgot to mention Tom Droege.
- Sorry Tom! Tom says:
-
- "My results were that there are problems in assuming that the
- 1.48*I correction is valid."
-
- Notoya measured the gas that evolved from the cell and found that it was the
- amount predicted by this standard factor for light water electrolysis. I
- believe Noninski also measured the gas, but I am not sure. Notoya and
- Srinivasan also both measured far more heat than the total input I * V, so even
- if there is recombination on the nickel cathode, it is not an issue.
-
- Tom predicts:
-
- "When [the light water experiment is] done in closed form, for a very long
- time, with the energy balance measured from the start of the experiment, and
- with equally good instrumentation; the experiment will be null."
-
- This would be a good test, but based upon my conversations with people who
- doing the light water experiments, I have several cautions and warnings to
- anyone who wishes to try this:
-
- Keep everything as clean as possible. The light water systems do not like
- conventional recombiner materials. Throw one of those dirty things in the cell,
- and "you can kiss it goodby."
-
- Get a lot of practice with "open" cells first. Be sure you exceed I * V.
-
- If possible, use a separate recombiner. Tom did this, as I recall. One person
- told me, "be sure it is *really* separate, you don't want gunk going back up
- the tube."
-
- Maybe a fuel cell arrangement would be clean? I don't know the details.
-
-
- Dick Blue comments: "Since this experiment is conducted in 'vacuum' it is time
- to give Jed a little review of what that word means..." Well, Dick, I believe
- Yamaguchi said it was 10 ^ -8 torr. That sounds pretty vacuuous to me, kind of
- like your knowledge of what Yamaguchi is doing. I notice that you immediately
- started making fun of Yamaguchi, and attacking him, and asking "when will he
- get serious," and then from time to time you stopped and asked questions like:
-
- "Is this being done in a vacuum or in a liquid"
-
- "Is he using a mass spec?"
-
- Such questions indicate that you have not got the foggiest, vaugest idea of
- what he is doing, or even what kind of instruments he is using, and that you
- have jumped to the conclusion that he is incompetant without knowing anything
- at all about him! I bet you have never heard of the guy. You are asking
- elementary questions about the experiment which reveal that you have not even
- seen the abstract, not to mention the full paper. In my opinion, you are are
- making a fool of yourself.
-
- - Jed
-
-